CA2661650C - Video monitoring device providing parametric signal curve display features and related methods - Google Patents
Video monitoring device providing parametric signal curve display features and related methods Download PDFInfo
- Publication number
- CA2661650C CA2661650C CA2661650A CA2661650A CA2661650C CA 2661650 C CA2661650 C CA 2661650C CA 2661650 A CA2661650 A CA 2661650A CA 2661650 A CA2661650 A CA 2661650A CA 2661650 C CA2661650 C CA 2661650C
- Authority
- CA
- Canada
- Prior art keywords
- video
- curve
- pixel intensity
- intensity values
- display
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000012806 monitoring device Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims description 16
- 241000023320 Luma <angiosperm> Species 0.000 claims description 7
- 238000009825 accumulation Methods 0.000 claims description 7
- OSWPMRLSEDHDFF-UHFFFAOYSA-N methyl salicylate Chemical compound COC(=O)C1=CC=CC=C1O OSWPMRLSEDHDFF-UHFFFAOYSA-N 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 7
- 238000003672 processing method Methods 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 description 8
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 239000000872 buffer Substances 0.000 description 4
- 238000013459 approach Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010894 electron beam technology Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 235000014653 Carica parviflora Nutrition 0.000 description 1
- 241000243321 Cnidaria Species 0.000 description 1
- 235000017274 Diospyros sandwicensis Nutrition 0.000 description 1
- 241000282838 Lama Species 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000010420 art technique Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
- H04N17/02—Diagnosis, testing or measuring for television systems or their details for colour television signals
Abstract
A video monitoring device (30) may include an input (31) for a video input signal, a display (33), and a video processor (32) coupled to the input and the display. The video processor (32) may be for obtaining from the video input signal at least one parametric signal defining a curve, calculating derivative values for the curve, and displaying pixel intensity values on the display (33) based upon the derivative values so that more rapidly changing portions of the curve appear dimmer and more slowly changing portions of the curve appear brighter.
Description
VIDEO MONITORING DEVICE PROVIDING PARAMETRIC SIGNAL
CURVE DISPLAY FEATURES AND RELATED METHODS
The present invention relates to the field of video signal processing, and, more particularly, to video signal test and measurement systems and related methods.
Various types of devices have traditionally been used in video applications for signal testing and monitoring purposes. One such device is the waveform monitor, which is a specialized form of oscilloscope used to measure and display the level or voltage of a video signal (i.e., luminance) with respect to time.
This level may be used for calibrating a video camera, for example, as well as other uses. Another important device is the vectorscope, which is anoter specialized form of oscilloscope that is used to visualize chrominance components of a video signal.
As television and other video formats transition to the digital domain, the need for digital (i.e., computer-based) testing and monitoring tools has increased.
Yet, typical video monitoring tools often fall short of the level of information that can be provided with analog devices such as waveform monitors and vectorscopes. As a result, certain approaches have been developed in an attempt to replicate video signal analysis capabilities of analog devices in digital video platforms.
By way of example, one such digital video signal testing and monitoring platform is the Omnitek XR from Image Processing Techniques Ltd. of the UK. Waveform generation algorithms are used to give user-adjustable displays.
Arbitrary combinations of components may be displayed simultaneously, such as YRGB and vectorscope, or YCbCr and Composite. The continuously variable H and V magnification and Y range may be set via a region-of-interest control. The vectorscope is scalable, and may also operate on a selected region-of-interest. Further, a "luma qualification mode" enables the vectorscope to display chroma values within a specific luma range.
While such devices have begun to provide waveform monitor and vectorscope views, further enhancements to the capabilities of such digital waveform monitor and vectroscope simulators may be desirable to more closely approximate the actual output of their analog counterparts in some applications.
In view of the foregoing background, it is therefore an object of the present invention to provide video monitoring devices with enhanced testing and monitoring features and related methods.
This and other objects, features, and advantages are provided by a video monitoring device which may include an input for a video input signal, a display, and a video processor coupled to the input and the display. The video processor may be for obtaining from the video input signal at least one parametric signal defining a curve, calculating derivative values for the curve, and displaying pixel intensity values on the display based upon the derivative values so that more rapidly changing portions of the curve appear dimmer and more slowly changing portions of the curve appear brighter. As such, the video monitoring device may advantageously provide a digital or computer-based monitoring platform that more accurately approximates the outputs of traditional analog waveform monitors and/or vectorscopes, for example.
More particularly, the video processor may further perform an accumulation so that each displayed pixel intensity value is based upon a current pixel intensity value and at least one prior pixel intensity value. By way of example, the video processor may include a frame buffer for performing the accumulation. In addition, the video processor may further perform an intensity modulation so that each displayed pixel intensity value is based upon a modulated derivative value.
The video processor may further display the video signal on the display. Additionally, the video processor may perform the calculating and displaying in real-time with respect to the at least one parametric signal. The video processor may include a Graphics Processing Unit (GPU), for example. Also by way of example, the at least one parametric signal may include one or more luma and/or chroma components.
A related video processing method may include obtaining at least one parametric signal defining a curve from a video input signal, and calculating
CURVE DISPLAY FEATURES AND RELATED METHODS
The present invention relates to the field of video signal processing, and, more particularly, to video signal test and measurement systems and related methods.
Various types of devices have traditionally been used in video applications for signal testing and monitoring purposes. One such device is the waveform monitor, which is a specialized form of oscilloscope used to measure and display the level or voltage of a video signal (i.e., luminance) with respect to time.
This level may be used for calibrating a video camera, for example, as well as other uses. Another important device is the vectorscope, which is anoter specialized form of oscilloscope that is used to visualize chrominance components of a video signal.
As television and other video formats transition to the digital domain, the need for digital (i.e., computer-based) testing and monitoring tools has increased.
Yet, typical video monitoring tools often fall short of the level of information that can be provided with analog devices such as waveform monitors and vectorscopes. As a result, certain approaches have been developed in an attempt to replicate video signal analysis capabilities of analog devices in digital video platforms.
By way of example, one such digital video signal testing and monitoring platform is the Omnitek XR from Image Processing Techniques Ltd. of the UK. Waveform generation algorithms are used to give user-adjustable displays.
Arbitrary combinations of components may be displayed simultaneously, such as YRGB and vectorscope, or YCbCr and Composite. The continuously variable H and V magnification and Y range may be set via a region-of-interest control. The vectorscope is scalable, and may also operate on a selected region-of-interest. Further, a "luma qualification mode" enables the vectorscope to display chroma values within a specific luma range.
While such devices have begun to provide waveform monitor and vectorscope views, further enhancements to the capabilities of such digital waveform monitor and vectroscope simulators may be desirable to more closely approximate the actual output of their analog counterparts in some applications.
In view of the foregoing background, it is therefore an object of the present invention to provide video monitoring devices with enhanced testing and monitoring features and related methods.
This and other objects, features, and advantages are provided by a video monitoring device which may include an input for a video input signal, a display, and a video processor coupled to the input and the display. The video processor may be for obtaining from the video input signal at least one parametric signal defining a curve, calculating derivative values for the curve, and displaying pixel intensity values on the display based upon the derivative values so that more rapidly changing portions of the curve appear dimmer and more slowly changing portions of the curve appear brighter. As such, the video monitoring device may advantageously provide a digital or computer-based monitoring platform that more accurately approximates the outputs of traditional analog waveform monitors and/or vectorscopes, for example.
More particularly, the video processor may further perform an accumulation so that each displayed pixel intensity value is based upon a current pixel intensity value and at least one prior pixel intensity value. By way of example, the video processor may include a frame buffer for performing the accumulation. In addition, the video processor may further perform an intensity modulation so that each displayed pixel intensity value is based upon a modulated derivative value.
The video processor may further display the video signal on the display. Additionally, the video processor may perform the calculating and displaying in real-time with respect to the at least one parametric signal. The video processor may include a Graphics Processing Unit (GPU), for example. Also by way of example, the at least one parametric signal may include one or more luma and/or chroma components.
A related video processing method may include obtaining at least one parametric signal defining a curve from a video input signal, and calculating
-2-derivative values for the curve. The method may further include displaying pixel intensity values on a display based upon the derivative values so that more rapidly changing portions of the curve appear dimmer and more slowly changing portions of the curve appear brighter.
FIG. 1 is a schematic block diagram of an exemplary video monitoring device in accordance with the invention.
FIG. 2 is a schematic block diagram of an exemplary embodiment of the video processor of the video monitoring device of FIG. 1.
FIGS. 3 and 4 are flow diagrams illustrating video monitoring method aspects of the invention.
FIG. 5 is a display view showing, in respective quadrants of the display, a video input signal and corresponding waveform monitor and vectorscope views generated in accordance with a prior art technique.
FIG. 6 is a display view corresponding to that of FIG. 5 with the same video input signal, but with the waveform monitor and vectorscope views generated in accordance with the present invention.
The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Like numbers refer to like elements throughout, and prime notation is used to indicate similar elements or steps in alternate embodiments.
Generally speaking, components of a video signal, such a luma and chroma components, define parametric curves in which the line is parametric over some non-spatial quantity, such as time, and may cross over itself (or coincide with itself) at any number of places. Thus, when these curves are rendered in line graph form on a waveform monitor or vectorscope, for example, locations where the line crosses over itself will appear brighter (because this section is being illuminated more
FIG. 1 is a schematic block diagram of an exemplary video monitoring device in accordance with the invention.
FIG. 2 is a schematic block diagram of an exemplary embodiment of the video processor of the video monitoring device of FIG. 1.
FIGS. 3 and 4 are flow diagrams illustrating video monitoring method aspects of the invention.
FIG. 5 is a display view showing, in respective quadrants of the display, a video input signal and corresponding waveform monitor and vectorscope views generated in accordance with a prior art technique.
FIG. 6 is a display view corresponding to that of FIG. 5 with the same video input signal, but with the waveform monitor and vectorscope views generated in accordance with the present invention.
The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Like numbers refer to like elements throughout, and prime notation is used to indicate similar elements or steps in alternate embodiments.
Generally speaking, components of a video signal, such a luma and chroma components, define parametric curves in which the line is parametric over some non-spatial quantity, such as time, and may cross over itself (or coincide with itself) at any number of places. Thus, when these curves are rendered in line graph form on a waveform monitor or vectorscope, for example, locations where the line crosses over itself will appear brighter (because this section is being illuminated more
-3-often by the electron beam). Additionally, in those locations where the curve changes more rapidly, the phosphors will appear dimmer (because the beam remains on the phosphor a shorter amount of time), and vice-versa.
While these subtleties are readily apparent to the skilled artisan on traditional analog waveform monitors and vectorscopes, they typically do not translate to computer or digitally-based waveform simulation tools. Referring initially to FIG. 5, consider a CRT-based video waveform monitor which is a function plot of video input signal 61 image data (of an undersea diver next to a coral reef), where the data samples have an x,y location on a screen 60. In the illustrated example, the video input signal 61 data samples are mapped to the lower left quadrant of the screen 60, although they could be mapped to other locations or windows on the screen 60 as well.
A plot of x horizontally vs. luminance (Y) vertically may be expressed as a linear combination of red (r), green (g), and blue (b). A digitally-generated plot 62 (i.e., a simulated waveform monitor view) of this luminance function using a simple prior art line graph technique shows lines of full intensity, as seen in the upper left quadrant of the screen 60. The plot 62 does not capture the information of the time at any point on the curve as would a waveform monitor output, since any point at which the curve crosses the pixel value will be fully saturated. A vectorscope view 63 of the red and blue chroma components Cr, Cb of the input video signal 61 that is generated using the same technique is shown in the upper right quadrant.
Again, since every point at which the functions cross is fully saturated, the varying intensity level that would otherwise have been present on an analog vectorscope is lost. The lower right quadrant of the screen 60 is not used in the illustrated example.
Turning to FIGS. 1 and 4, a video monitoring device 30 and associated method in accordance with the invention are now described. The video monitoring device 30 illustratively includes an input 31 for a video input signal, a display 33, and a video processor 32 coupled to the input and the display. Generally speaking, the video processor 32 obtains from the video input signal one or more parametric signals (e.g., lama and/or chroma components) defining a curve, at Blocks 50-51 (FIG.
3) and Blocks 50'-51' (FIG. 4). The video processor 32 also illustratively calculates
While these subtleties are readily apparent to the skilled artisan on traditional analog waveform monitors and vectorscopes, they typically do not translate to computer or digitally-based waveform simulation tools. Referring initially to FIG. 5, consider a CRT-based video waveform monitor which is a function plot of video input signal 61 image data (of an undersea diver next to a coral reef), where the data samples have an x,y location on a screen 60. In the illustrated example, the video input signal 61 data samples are mapped to the lower left quadrant of the screen 60, although they could be mapped to other locations or windows on the screen 60 as well.
A plot of x horizontally vs. luminance (Y) vertically may be expressed as a linear combination of red (r), green (g), and blue (b). A digitally-generated plot 62 (i.e., a simulated waveform monitor view) of this luminance function using a simple prior art line graph technique shows lines of full intensity, as seen in the upper left quadrant of the screen 60. The plot 62 does not capture the information of the time at any point on the curve as would a waveform monitor output, since any point at which the curve crosses the pixel value will be fully saturated. A vectorscope view 63 of the red and blue chroma components Cr, Cb of the input video signal 61 that is generated using the same technique is shown in the upper right quadrant.
Again, since every point at which the functions cross is fully saturated, the varying intensity level that would otherwise have been present on an analog vectorscope is lost. The lower right quadrant of the screen 60 is not used in the illustrated example.
Turning to FIGS. 1 and 4, a video monitoring device 30 and associated method in accordance with the invention are now described. The video monitoring device 30 illustratively includes an input 31 for a video input signal, a display 33, and a video processor 32 coupled to the input and the display. Generally speaking, the video processor 32 obtains from the video input signal one or more parametric signals (e.g., lama and/or chroma components) defining a curve, at Blocks 50-51 (FIG.
3) and Blocks 50'-51' (FIG. 4). The video processor 32 also illustratively calculates
-4-derivative values for the curve, at Block 52 (FIG. 3) and Blocks 52' (FIG. 4), and displays pixel intensity values on the display 33 based upon the derivative values so that more rapidly changing portions of the curve appear dimmer, and more slowly changing portions of the curve appear brighter, at Block 53 (FIG. 3) and Blocks 53' (FIG. 4), thus concluding the illustrated method (Block 54, (FIG. 3) and Blocks 54' (FIG. 4)). As such, the video monitoring device advantageously provides a digital or computer-based monitoring platform that more accurately approximates the outputs of traditional analog waveform monitors and/or vectorscopes, for example, as will be discussed further below.
Referring more particularly to FIG. 2, in one exemplary embodiment the video processor 32 may be implemented with a graphics processing unit (GPU).
However, the various components and functions of the GPU 32 described herein need not be performed by a dedicated GPU in all embodiments, and could instead be performed by a system microprocessor, etc., as will be appreciated by those skilled in the art. In the illustrated example, the input video signal is a composite signal, and a signal splitter 34 is used to separate the composite signal into its respective luma (Y) and red/blue chroma (Cr, Cb) components, as will be appreciated by those skilled in the art. However, in some embodiments the signal provided from the input 31 may already be separated into its respective components, so that the signal splitter 34 need not be included. Moreover, in some embodiments the input 31 and video processor 32 could be integrated in the same GPU, and other parametric video signal types (e.g., RGB, etc.) maybe used instead of YCrCb.
The GPU 32 also illustratively includes a derivative module 35 downstream from the signal splitter 34 for generating derivates dY(x), dCb(x), and dCr(x) of the respective Y, Cb, and Cr components. It should be noted that in some embodiments the derivative module 35 (or other component) may first convert the Y, Cb, and Cr components to color spare (i.e., RGB) prior to performing the derivative and subsequent operations discussed below, as will be appreciated by those skilled in the art. As noted above, in a parametric function plot of position vs. time on a classical waveform monitor scope (i.e., with an electron beam illuminating phosphor), the rate of change of position of the beam is related to how much time the electron
Referring more particularly to FIG. 2, in one exemplary embodiment the video processor 32 may be implemented with a graphics processing unit (GPU).
However, the various components and functions of the GPU 32 described herein need not be performed by a dedicated GPU in all embodiments, and could instead be performed by a system microprocessor, etc., as will be appreciated by those skilled in the art. In the illustrated example, the input video signal is a composite signal, and a signal splitter 34 is used to separate the composite signal into its respective luma (Y) and red/blue chroma (Cr, Cb) components, as will be appreciated by those skilled in the art. However, in some embodiments the signal provided from the input 31 may already be separated into its respective components, so that the signal splitter 34 need not be included. Moreover, in some embodiments the input 31 and video processor 32 could be integrated in the same GPU, and other parametric video signal types (e.g., RGB, etc.) maybe used instead of YCrCb.
The GPU 32 also illustratively includes a derivative module 35 downstream from the signal splitter 34 for generating derivates dY(x), dCb(x), and dCr(x) of the respective Y, Cb, and Cr components. It should be noted that in some embodiments the derivative module 35 (or other component) may first convert the Y, Cb, and Cr components to color spare (i.e., RGB) prior to performing the derivative and subsequent operations discussed below, as will be appreciated by those skilled in the art. As noted above, in a parametric function plot of position vs. time on a classical waveform monitor scope (i.e., with an electron beam illuminating phosphor), the rate of change of position of the beam is related to how much time the electron
-5-beam illuminates the phosphor, and in turn how intense the glow of the phosphor is.
Where the curve changes value slowly over time, the glow is more intense, and where the curve changes value quickly, the glow is less intense. Taking the first derivative of the parametric curve of the components Y, Cb, and Cr with respect to time and using it to modulate the intensity of pixels being drawn provides a relatively accurate simulation of this change in intensity as it would appear on the phosphor.
The derivative of a given curve can be pre-calculated, or it may be calculated using a GPU feature that remembers the partial derivatives of X and Y in screen space with respect to the plot of the line (which corresponds to time), as will be appreciated by those skilled in the art. By way of example, using the DirectX
platform from Microsoft Corp., the partial derivatives may be calculated using the HLSL expression "fwidth(input.coord.xy)," although other platforms and approaches may also be used.
Additionally, the GPU 32 also performs an accumulation or saturation of the derivative values dY(x), dCb(x), and dCr(x) (or their equivalent RGB
values) of respective signal components so that each displayed pixel intensity value is based upon a current pixel intensity value and at least one prior pixel intensity value, at Block 55' (FIG. 4). By way of example, the GPU 32 illustratively includes one or more accumulating frame buffers 36 for performing the accumulation, providing accumulated component outputs EdY(x), EdCb(x), and EdCr(x). In other words, as each pixel is drawn, new frame buffer 36 values are assigned a linear combination of the previous frame buffer value and the new pixel value, as will be appreciated by those skilled in the art. In accordance with one exemplary embodiment, a value of saturation used may be the inverse of the first derivative, although other values may also be used.
The video processor 32 may further perform an intensity modulation so that each displayed pixel intensity value is based upon a modulated derivative value, at Block 56'. That is, the intensity of pixels to be displayed is modulated (multiplied) by the accumulated derivative quantity so that it is therefore scaled to the appropriate intensity on the display 33. The intensity modulator 37 provides the appropriate
Where the curve changes value slowly over time, the glow is more intense, and where the curve changes value quickly, the glow is less intense. Taking the first derivative of the parametric curve of the components Y, Cb, and Cr with respect to time and using it to modulate the intensity of pixels being drawn provides a relatively accurate simulation of this change in intensity as it would appear on the phosphor.
The derivative of a given curve can be pre-calculated, or it may be calculated using a GPU feature that remembers the partial derivatives of X and Y in screen space with respect to the plot of the line (which corresponds to time), as will be appreciated by those skilled in the art. By way of example, using the DirectX
platform from Microsoft Corp., the partial derivatives may be calculated using the HLSL expression "fwidth(input.coord.xy)," although other platforms and approaches may also be used.
Additionally, the GPU 32 also performs an accumulation or saturation of the derivative values dY(x), dCb(x), and dCr(x) (or their equivalent RGB
values) of respective signal components so that each displayed pixel intensity value is based upon a current pixel intensity value and at least one prior pixel intensity value, at Block 55' (FIG. 4). By way of example, the GPU 32 illustratively includes one or more accumulating frame buffers 36 for performing the accumulation, providing accumulated component outputs EdY(x), EdCb(x), and EdCr(x). In other words, as each pixel is drawn, new frame buffer 36 values are assigned a linear combination of the previous frame buffer value and the new pixel value, as will be appreciated by those skilled in the art. In accordance with one exemplary embodiment, a value of saturation used may be the inverse of the first derivative, although other values may also be used.
The video processor 32 may further perform an intensity modulation so that each displayed pixel intensity value is based upon a modulated derivative value, at Block 56'. That is, the intensity of pixels to be displayed is modulated (multiplied) by the accumulated derivative quantity so that it is therefore scaled to the appropriate intensity on the display 33. The intensity modulator 37 provides the appropriate
-6-bitmap/raster output for the display 33, which may be a liquid crystal display (LCD), cathode ray tube (CRT) monitor, or other suitable monitor type, as will be appreciated by those skilled in the art.
The GPU may also advantageously display the original video signal along with the derivative curve values. This is illustratively shown by the Y, Cr, and Cb components being directly fed from the signal splitter 34 to the intensity modulator 37 to be included in the bitmap/raster output for the display 33.
Because of the dedicated graphics processing ability of the GPU 32, the derivative calculation, accumulation, and displaying of the curve values may advantageously be performed in real-time with respect to the parametric signals Y, Cb, and Cr so that they may be displayed simulataneously on the display 33 for comparison.
Turning now to FIG. 6, the same video signal 61' discussed above with reference to FIG. 5 is again shown in the lower left quadrant of the screen 60', but here the simulated Y waveform view 62' and vectorscope view 63' are generated using the above-described derivation and accumulation approach. The viewer is now able to visualize the time component of the plots (i.e., since they are derivative-based), which was previously not represented in plots 62 and 63. In addition, the extraneous contributions of fast moving parts of the curve (vertically oriented line segments in the case of the waveform monitor) are visually reduced because they are extremely faint. In some embodiments, the degree to which the derivative modulates the intensity may be adjusted by the user at runtime, if desired.
The video processing device 30 therefore advantageously provides a computer or digitally-based broadcast, post-production, research and development, and/or manufacturing production platform which may provide side-by-side comparisons of an input video with its component waveform and vectorscope outputs, for example. Moreover, the simulated waveform and vectorscope plots more closely approximate the outputs of their analog counterparts, providing enhanced information to video engineers and technicians in a convenient multi-window display.
The GPU may also advantageously display the original video signal along with the derivative curve values. This is illustratively shown by the Y, Cr, and Cb components being directly fed from the signal splitter 34 to the intensity modulator 37 to be included in the bitmap/raster output for the display 33.
Because of the dedicated graphics processing ability of the GPU 32, the derivative calculation, accumulation, and displaying of the curve values may advantageously be performed in real-time with respect to the parametric signals Y, Cb, and Cr so that they may be displayed simulataneously on the display 33 for comparison.
Turning now to FIG. 6, the same video signal 61' discussed above with reference to FIG. 5 is again shown in the lower left quadrant of the screen 60', but here the simulated Y waveform view 62' and vectorscope view 63' are generated using the above-described derivation and accumulation approach. The viewer is now able to visualize the time component of the plots (i.e., since they are derivative-based), which was previously not represented in plots 62 and 63. In addition, the extraneous contributions of fast moving parts of the curve (vertically oriented line segments in the case of the waveform monitor) are visually reduced because they are extremely faint. In some embodiments, the degree to which the derivative modulates the intensity may be adjusted by the user at runtime, if desired.
The video processing device 30 therefore advantageously provides a computer or digitally-based broadcast, post-production, research and development, and/or manufacturing production platform which may provide side-by-side comparisons of an input video with its component waveform and vectorscope outputs, for example. Moreover, the simulated waveform and vectorscope plots more closely approximate the outputs of their analog counterparts, providing enhanced information to video engineers and technicians in a convenient multi-window display.
-7-
Claims (13)
1. A video monitoring device comprising:
an input for a video input signal;
a display; and a video processor coupled to said input and said display and configured for obtaining from the video input signal a plurality of different parametric signal components defining a curve over time, calculating respective derivative values for each of the parametric signal components defining the curve over time, generating component pixel intensity values representing the curve based upon respective calculated derivative values for each of the parametric signal components, accumulating component pixel intensity values for respective pixels, and displaying the accumulated component pixel intensity values on said display so that more rapidly changing portions of the curve with respect to time appear dimmer, and so that more slowly changing portions of the curve and portions of the curve that cross over itself appear brighter.
an input for a video input signal;
a display; and a video processor coupled to said input and said display and configured for obtaining from the video input signal a plurality of different parametric signal components defining a curve over time, calculating respective derivative values for each of the parametric signal components defining the curve over time, generating component pixel intensity values representing the curve based upon respective calculated derivative values for each of the parametric signal components, accumulating component pixel intensity values for respective pixels, and displaying the accumulated component pixel intensity values on said display so that more rapidly changing portions of the curve with respect to time appear dimmer, and so that more slowly changing portions of the curve and portions of the curve that cross over itself appear brighter.
2. The video monitoring device of Claim 1 wherein said video processor is further configured to perform the accumulation so that the displayed component pixel intensity values are based upon a current component pixel intensity values and prior component pixel intensity values.
3. The video monitoring device of Claim 1 wherein said video processor is further configured to perform an intensity modulation so that the displayed component pixel intensity values are scaled to a bitmap or raster intensity.
4. The video monitoring device of Claim 1 wherein said video processor is further configured to display on said display the video signal.
5. The video monitoring device of Claim 1 wherein said video processor comprises a Graphics Processing Unit (GPU).
6. A video processing method comprising:
obtaining from a video input signal a plurality of different parametric signal components defining a curve over time;
calculating respective derivative values for each of the parametric signal components defining the curve over time;
generating component pixel intensity values representing the curve based upon respective calculated derivative values for each of the parametric signal components;
accumulating component pixel intensity values for respective pixels; and displaying the accumulated component pixel intensity values on a display so that more rapidly changing portions of the curve with respect to time appear dimmer, and so that more slowly changing portions of the curve and portions of the curve that cross over itself appear brighter.
obtaining from a video input signal a plurality of different parametric signal components defining a curve over time;
calculating respective derivative values for each of the parametric signal components defining the curve over time;
generating component pixel intensity values representing the curve based upon respective calculated derivative values for each of the parametric signal components;
accumulating component pixel intensity values for respective pixels; and displaying the accumulated component pixel intensity values on a display so that more rapidly changing portions of the curve with respect to time appear dimmer, and so that more slowly changing portions of the curve and portions of the curve that cross over itself appear brighter.
7. The method of Claim 6 wherein accumulating comprises accumulating component pixel intensity values for respective pixels so that the displayed component pixel intensity values are based upon a current pixel intensity values and prior component pixel intensity values.
8. The method of Claim 6 further comprising performing an intensity modulation so that the displayed component pixel intensity values are scaled to a bitmap or raster intensity.
9. The method of Claim 6 further comprising displaying the video signal on the display.
10. The method of Claim 6 wherein the plurality of different parametric signal components comprise a luma component (Y), a red chroma component (Cr), and a blue chroma component (Cb).
11. The method of Claim 6 wherein the plurality of different parametric signal components comprise red, green, and blue (RGB) components.
12. The video monitoring device of Claim 1 wherein the plurality of different parametric signal components comprise a luma component (Y), a red chroma component (Cr), and a blue chroma component (Cb).
13. The video monitoring device of Claim 1 wherein the plurality of different parametric signal components comprise red, green, and blue (RGB) components.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/100,060 US8717435B2 (en) | 2008-04-09 | 2008-04-09 | Video monitoring device providing parametric signal curve display features and related methods |
US12/100,060 | 2008-04-09 |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2661650A1 CA2661650A1 (en) | 2009-10-09 |
CA2661650C true CA2661650C (en) | 2012-06-19 |
Family
ID=41161251
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA2661650A Active CA2661650C (en) | 2008-04-09 | 2009-04-07 | Video monitoring device providing parametric signal curve display features and related methods |
Country Status (4)
Country | Link |
---|---|
US (1) | US8717435B2 (en) |
EP (1) | EP2286597B1 (en) |
CA (1) | CA2661650C (en) |
WO (1) | WO2010011374A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11874302B2 (en) | 2020-02-27 | 2024-01-16 | Boe Technology Group Co., Ltd. | Digital oscilloscope and oscillogram generation system |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120210229A1 (en) | 2011-02-16 | 2012-08-16 | Andrew Bryant | Color workflow |
US8854370B2 (en) | 2011-02-16 | 2014-10-07 | Apple Inc. | Color waveform |
JP5981797B2 (en) * | 2012-07-25 | 2016-08-31 | キヤノン株式会社 | Imaging apparatus, control method therefor, and computer program |
KR102376431B1 (en) | 2015-07-06 | 2022-03-22 | 삼성디스플레이 주식회사 | Display device |
KR102370442B1 (en) * | 2017-08-17 | 2022-03-03 | 엘지전자 주식회사 | Image display apparatus |
CN111901572B (en) * | 2020-08-14 | 2022-03-18 | 广州盈可视电子科技有限公司 | Multi-channel video stream synthesis method, device, equipment and storage medium |
Family Cites Families (38)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5387896A (en) * | 1990-08-06 | 1995-02-07 | Tektronix, Inc. | Rasterscan display with adaptive decay |
US5291102A (en) * | 1990-10-12 | 1994-03-01 | Washburn Clayton A | Dynamic color separation display |
US5600573A (en) | 1992-12-09 | 1997-02-04 | Discovery Communications, Inc. | Operations center with video storage for a television program packaging and delivery system |
US5649032A (en) | 1994-11-14 | 1997-07-15 | David Sarnoff Research Center, Inc. | System for automatically aligning images to form a mosaic image |
JP3823333B2 (en) * | 1995-02-21 | 2006-09-20 | 株式会社日立製作所 | Moving image change point detection method, moving image change point detection apparatus, moving image change point detection system |
WO1996037785A1 (en) | 1995-05-23 | 1996-11-28 | Philips Electronics N.V. | Image quality improvement on raster display |
US5862312A (en) | 1995-10-24 | 1999-01-19 | Seachange Technology, Inc. | Loosely coupled mass storage computer cluster |
US5867657A (en) | 1996-06-06 | 1999-02-02 | Microsoft Corporation | Distributed scheduling in a multiple data server system |
US5929842A (en) | 1996-07-31 | 1999-07-27 | Fluke Corporation | Method and apparatus for improving time variant image details on a raster display |
US5928327A (en) | 1996-08-08 | 1999-07-27 | Wang; Pong-Sheng | System and process for delivering digital data on demand |
US6243095B1 (en) | 1996-12-05 | 2001-06-05 | Peter E. Shile | Navigation and display system for digital radiographs |
US6246389B1 (en) | 1997-06-03 | 2001-06-12 | Agilent Technologies, Inc. | Simulating analog display slew rate intensity variations in a digital graphics display |
US6222521B1 (en) | 1998-04-03 | 2001-04-24 | Tektronix, Inc. | High waveform throughput digital oscilloscope with variable intensity rasterizer and variable intensity or color display |
US6333732B1 (en) | 1998-06-05 | 2001-12-25 | Tektronix, Inc. | Multi-function digital persistence decay |
US7092621B1 (en) | 1998-11-10 | 2006-08-15 | Sony Corporation | Data recorder-reproducer and bit map data processing method, control program processing method and setting data processing method of data recorder-reproducer |
US6219094B1 (en) * | 1999-04-16 | 2001-04-17 | Tektronix, Inc. | Non-linear filter for extracting luminance component from a composite video signal |
US20040109077A1 (en) * | 1999-06-17 | 2004-06-10 | Abdellatif Mohammed A. | Camera, imaging system and illuminations sensor |
US6816194B2 (en) | 2000-07-11 | 2004-11-09 | Microsoft Corporation | Systems and methods with error resilience in enhancement layer bitstream of scalable video coding |
GB0022071D0 (en) | 2000-09-08 | 2000-10-25 | Pandora Int Ltd | Image processing |
CA2379782C (en) | 2001-04-20 | 2010-11-02 | Evertz Microsystems Ltd. | Circuit and method for live switching of digital video programs containing embedded audio data |
TWI251199B (en) * | 2003-03-31 | 2006-03-11 | Sharp Kk | Image processing method and liquid-crystal display device using the same |
US6862027B2 (en) | 2003-06-30 | 2005-03-01 | Microsoft Corp. | System and method for parallel execution of data generation tasks |
US7355601B2 (en) | 2003-06-30 | 2008-04-08 | International Business Machines Corporation | System and method for transfer of data between processors using a locked set, head and tail pointers |
EP1509040A3 (en) * | 2003-08-20 | 2006-07-12 | Lg Electronics Inc. | Method for managing digital slow shutter mode in monitor camera |
JP4255819B2 (en) * | 2003-12-11 | 2009-04-15 | パナソニック株式会社 | Signal processing method and image acquisition apparatus |
US20050254440A1 (en) | 2004-05-05 | 2005-11-17 | Sorrell John D | Private multimedia network |
JP4337673B2 (en) * | 2004-07-21 | 2009-09-30 | ソニー株式会社 | Display device and method, recording medium, and program |
EP1862017A4 (en) * | 2005-03-25 | 2011-03-23 | Algolith Inc | Apparatus and method for objective assessment of dct-coded video quality with or without an original video sequence |
US7693897B2 (en) | 2005-08-26 | 2010-04-06 | Harris Corporation | System, program product, and methods to enhance media content management |
US20070050382A1 (en) | 2005-08-26 | 2007-03-01 | Harris Corporation | System, program product, and methods to enhance media content management |
US8250051B2 (en) | 2005-08-26 | 2012-08-21 | Harris Corporation | System, program product, and methods to enhance media content management |
US7834780B2 (en) * | 2006-03-20 | 2010-11-16 | Tektronix, Inc. | Waveform compression and display |
US8446394B2 (en) * | 2006-06-16 | 2013-05-21 | Visam Development L.L.C. | Pixel circuits and methods for driving pixels |
US20080031539A1 (en) * | 2006-08-02 | 2008-02-07 | Sharp Laboratories Of America, Inc. | Derivative image domain |
DE102006038646B4 (en) * | 2006-08-17 | 2011-03-24 | Baumer Optronic Gmbh | Image processing apparatus for color image data |
US8149260B2 (en) * | 2006-10-31 | 2012-04-03 | Hewlett-Packard Development Company, L.P. | Methods and systems for producing seamless composite images without requiring overlap of source images |
KR100835894B1 (en) * | 2007-06-18 | 2008-06-09 | (주)실리콘화일 | Pixel array with broad dynamic range, better color reproduction and resolution, and image sensor using the pixel |
EP2216988B1 (en) * | 2007-12-04 | 2013-02-13 | Sony Corporation | Image processing device and method, program, and recording medium |
-
2008
- 2008-04-09 US US12/100,060 patent/US8717435B2/en active Active
-
2009
- 2009-04-07 CA CA2661650A patent/CA2661650C/en active Active
- 2009-04-08 WO PCT/US2009/039860 patent/WO2010011374A2/en active Application Filing
- 2009-04-08 EP EP09752237.9A patent/EP2286597B1/en active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11874302B2 (en) | 2020-02-27 | 2024-01-16 | Boe Technology Group Co., Ltd. | Digital oscilloscope and oscillogram generation system |
Also Published As
Publication number | Publication date |
---|---|
EP2286597A2 (en) | 2011-02-23 |
CA2661650A1 (en) | 2009-10-09 |
WO2010011374A3 (en) | 2010-03-18 |
US8717435B2 (en) | 2014-05-06 |
WO2010011374A2 (en) | 2010-01-28 |
EP2286597B1 (en) | 2015-06-03 |
US20090256907A1 (en) | 2009-10-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2661650C (en) | Video monitoring device providing parametric signal curve display features and related methods | |
US8791952B2 (en) | Method and system of immersive generation for two-dimension still image and factor dominating method, image content analysis method and scaling parameter prediction method for generating immersive sensation | |
JP5037311B2 (en) | Color reproduction system and method | |
US9013502B2 (en) | Method of viewing virtual display outputs | |
US9406113B2 (en) | Image processing apparatus and image display apparatus | |
US11956568B2 (en) | Video signal processing apparatus, video signal processing method, and video signal processing system | |
CN100489928C (en) | Method of manufacturing display device and correction value determining method | |
KR20140081693A (en) | Image processing device and method thereof | |
US9786038B2 (en) | Method for processing an image sequence having consecutive video images in order to improve the spatial resolution | |
CN109151431B (en) | Image color cast compensation method and device and display equipment | |
KR101221865B1 (en) | Sparkle processing | |
KR20030097507A (en) | Color calibrator for flat panel display and method thereof | |
US8055077B2 (en) | R/T display compression preserving intensity information | |
KR20110064631A (en) | Method and apparatus for converting dynamic ranges of input images | |
US11574607B2 (en) | Display device and control method of display device | |
KR100850166B1 (en) | Display element driving device and method thereof | |
KR100461018B1 (en) | Natural color reproduction method and apparatus on DTV | |
US20220012521A1 (en) | System for luminance qualified chromaticity | |
KR100922723B1 (en) | Apparatus for improving intensity and chroma in a display device and method of performing the same | |
KR100587587B1 (en) | True color reproduction method of a video display device | |
Lee et al. | P‐60: Novel Display Image Quality Analysis Based on Human Visual Perception | |
CN117351861A (en) | Display method and device of display screen, storage medium and processor | |
Kim | New display concept for realistic reproduction of high-luminance colors | |
Sarkar | Evaluation of the color image and video processing chain and visual quality management for consumer systems | |
Hodges et al. | Adelson, SJ, Badre, AN and |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request |