CN100531350C - Video data storing method and apparatus - Google Patents

Video data storing method and apparatus Download PDF

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CN100531350C
CN100531350C CNB2005100718357A CN200510071835A CN100531350C CN 100531350 C CN100531350 C CN 100531350C CN B2005100718357 A CNB2005100718357 A CN B2005100718357A CN 200510071835 A CN200510071835 A CN 200510071835A CN 100531350 C CN100531350 C CN 100531350C
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picture element
data
paintings
series
image
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CN1867056A (en
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谢百举
王子欣
林建佑
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Sunplus Technology Co Ltd
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Abstract

The invention relates to a method for storing image information and relative device. Wherein, said method uses one picture element processor to divide the picture element values of one image information, according to the highest magnification of secondary sampling and the information width of memory, into several picture element groups, to be recombined and separated stored into different memory blocks of memory; therefore, the invention can effectively obtain the secondary sampled image at 2n magnification, by only storing the full-resolution image information, to improve the defects of former technique that storing low-resolution image additively; then the invention alternatively arranges said picture element groups to make each memory block opened uniformly and alternatively, when storing the secondary sample and original image, to improve the utilization of memory.

Description

The method and apparatus of video data storing
Technical field
The invention relates to a kind of method of video data storing, and particularly relevant for a kind of video data storing so that obtain complete, 2,4 ..., 2 nThe method of the image of multiplying power sub-sampling.
Background technology
It is an image coder calcspar that uses hierarchy type dynamically to search that Fig. 1 illustrates, when carrying out image coding, except the raw video that needs full resolution, also need one to several layers low resolution to dwindle image for rough mobile search device 120 uses, and the method that image is dwindled in generation, comprise the picture element elder generation filtering of using 110 pairs of raw videos of an images filter device, reduce resolution again and get, or directly reduce the sub-sampling (sub-sample) of the pixel points of raw video and get.Yet, in the way in the past, in the time will realizing, all can produce the image data of low resolution and be stored in the extra internal memory, thereby increase the usage space of internal memory with hardware.
In addition, in the sub-sampling way that reduces pixel points, the picture element value of the picture element of low resolution and full resolution is identical, do not need to store the sub-sampling image in theory, and can read as the hop that Fig. 2 illustrated shown in the data structure of odd even picture element, in the full resolution image data, the mode of utilizing hop to read obtains the sub-sampling image data.But practical operation is restricted, when internal memory is when being storage unit with the character, to the position being the picture element data of unit, the action that can't read as hop in high efficiency mode, when causing most hardware to realize, all must store the image of low resolution in addition, conveniently to read.
Summary of the invention
Purpose of the present invention is exactly that a kind of method that stores the data of image is being provided, be that the picture element in the original image data is separated according to the highest sub-sampling multiplying power, internal memory is gone in the storage of laying equal stress on after the new layout, and be able under the situation that only stores the full resolution image data, the sub-sampling image be needn't store in addition, and then needed memory headroom and frequency range reduced.
A further object of the present invention provides a kind of device that stores the data of image, be to adopt a picture element processor that the picture element of reception image is separated according to the highest sub-sampling multiplying power, and after the data length reorganization with an internal memory, be stored in the different memory regions of this internal memory, and the reading efficiency of raising internal memory.
The present invention proposes a kind of method that stores the data of image, be convenient to from be stored one store data obtain complete, 2,4 ..., 2 nThe image of multiplying power sub-sampling, the step of the method comprises the picture element P with x bar picture element line X, y, be separated into 2 nThe plain group of a series of paintings, be expressed as the 1st, the 2nd respectively ..., the 2nd nThe plain group of a series of paintings, then the picture element of the plain group of the 1st a series of paintings comprises
Figure C20051007183500061
The picture element of the plain group of the 2nd a series of paintings comprises
Figure C20051007183500062
By that analogy, the 2nd nThe picture element of the plain group of a series of paintings comprises
Figure C20051007183500063
Above k, n, x, y are the positive integer greater than zero, with the picture element in the plain groups of these a series of paintings, recombinate respectively according to the data width of internal memory then, and are stored to different 2 of internal memory respectively nIn the individual memory region.
Method according to the data of the described storage image of preferred embodiment of the present invention, above-mentioned method comprises that also the picture element group with each bar picture element line is stored to respectively in the different memory region of internal memory, makes different described memory regions store the plain group of different described a series of paintings.
According to the method for the data of the described storage image of preferred embodiment of the present invention, above-mentioned method also comprises the separating step of the picture element of repetition picture element line, and each bar picture element line of this image data all is separated into 2 nThe plain group of a series of paintings.
Method according to the data of the described storage image of preferred embodiment of the present invention, when the above-mentioned data that stores when these picture element groups arrives a data quantity, then, be stored to respectively in these memory regions of internal memory after the data width reorganization of these picture element groups according to internal memory.
According to the method for the data of the described storage image of preferred embodiment of the present invention, all be separated into 2 with each described picture element line with this image data at the separating step of the picture element that repeats the picture element line nAfter the plain group of a series of paintings, and the picture element in plain groups with these a series of paintings is recombinated respectively according to the data width of internal memory and is stored to different 2 of internal memory respectively nAlso comprising before the step in the individual memory region, make the picture element group of odd number and even number, is unit with many described picture element lines, and cross arrangement is stored in these memory regions of internal memory, makes when reading, and these memory regions can alternately be opened.
According to the method for the data of the described storage image of preferred embodiment of the present invention,, be unit then, with picture element group cross arrangement in these memory regions of internal memory of odd number and even number with multiple bar chart frame picture element line if adopt the sub-sampling image of picture frame pattern.
Method according to the data of the described storage image of preferred embodiment of the present invention, if adopt the sub-sampling image of figure field mode, be unit then with multiple bar chart field picture element line, with picture element group cross arrangement in these memory regions of internal memory of odd number and even number, comprising picture element group cross arrangement in these memory regions of internal memory that will belong to figure field, top picture element line and base map field picture element line.
The present invention proposes a kind of device that stores the data of image, comprises a picture element processor, in order to the picture element P with the x bar picture element line in this image data X, y, be separated into 2 nThe plain group of a series of paintings, be expressed as the 1st, the 2nd respectively ..., the 2nd nThe plain group of a series of paintings, then the picture element of the plain group of the 1st a series of paintings comprises
Figure C20051007183500071
The picture element of the plain group of the 2nd a series of paintings comprises By that analogy, the 2nd nThe picture element of the plain group of a series of paintings comprises
Figure C20051007183500073
Above k, n, x, y are the positive integer greater than zero, comprise a Memory Controller Hub in addition, are coupled to the picture element processor, in order to the picture element in the plain group of these a series of paintings, recombinate respectively according to the data width of internal memory, and comprise 2 nIndividual memory region is coupled to Memory Controller Hub, in order to store the picture element group after recombinating, makes different described memory regions store the plain group of different described a series of paintings.
Device according to the data of the described storage image of preferred embodiment of the present invention, above-mentioned picture element processor also comprises a plurality of data buffers, a plurality of picture element values in order to video data storing, and comprise a data buffer control unit, be coupled to these data buffers,, the picture element value that is stored in these data buffers be separated into picture element group in order to according to the picture element position in the image data, and, store back the data buffer respectively according to the data width.
According to the device of the data of the described storage image of preferred embodiment of the present invention, above-mentioned when these data buffers are filled with the picture element value, then by after the memory controller reorganization, plain groups deposit in respectively in these memory regions with these a series of paintings.
The present invention is because of adopting the picture element value of a picture element processor with an image data, separate according to the data width of the high magnification of sub-sampling and internal memory and to be reassembled as a plurality of picture element group, and after handing over the trouble layout separate storage, reduce needed memory headroom and frequency range and can reach, and the purpose that improves the reading efficiency of internal memory.
For above and other objects of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below.
Description of drawings
It is an image coder calcspar that uses hierarchy type dynamically to search that Fig. 1 illustrates;
Fig. 2 illustrate is read the data structure of odd even picture element for hop;
Fig. 3 is the device calcspar of the data of the storage image that illustrates according to preferred embodiment of the present invention;
Fig. 4 is the method flow diagram of the data of the storage image that illustrates according to preferred embodiment of the present invention;
Fig. 5 is the device calcspar of data that illustrates the storage image of 2 times of the highest sub-samplings according to another preferred embodiment of the present invention;
Fig. 6 is the data structure of data that illustrates the storage image of 2 times of the highest sub-samplings according to another preferred embodiment of the present invention;
Fig. 7 reads the data structure of 2 times of data of sub-sampling according to what another preferred embodiment of the present invention illustrated 2 times of the highest sub-samplings by internal memory;
Fig. 8 reads the data structure of former resolution image data according to what another preferred embodiment of the present invention illustrated 2 times of the highest sub-samplings by internal memory;
Fig. 9 be according to the present invention again a preferred embodiment illustrate the data structure of data of the storage image of 4 times of the highest sub-samplings.
Embodiment
Fig. 3 and Fig. 4 are respectively the device calcspar and the method flow diagrams of the data of the storage image that illustrates according to preferred embodiment of the present invention.Please also refer to Fig. 3 and Fig. 4, at first receive the raw video data by raw video receiver 31, and by comprising the 1st buffer the 321, the 2nd buffer 322 in the picture element processor 32 ..., and the 2nd nA plurality of buffers of buffering 323 store (step S400) with the picture element value of raw video.
Then, judge whether that the stored picture element value of these buffers reaches a data quantity (step S410), if not, then continue to receive and store raw video data (step S400); If when having reached this data quantity, then utilize data buffer control unit 320 in it by picture element processor 32, read the x bar picture element line of the raw video data of these storages according to the high magnification of sub-sampling, and be separated into 2 nThe plain group (step S420) of a series of paintings repeats above-mentioned action, and judges whether each bar picture element line of the raw video data of these storages, all is separated into 2 nThe plain group (step S430) of a series of paintings if not, then continues the separating action of step S420; If then deposit back these buffers after the data length reorganization according to internal memory.
Then, see through Memory Controller Hub 33, do intersection layout (step S440) according to the data structure that odd even picture element intersection is deposited, and each memory region of write memory 34 comprise the 1st memory region the 341, the 2nd memory region 342 respectively ..., and the 2nd nMemory region 343 (step S450), last then judge whether that all raw video data all dispose (step S460), then repeat above-mentioned reception, processing if not, and the action that stores; If then finish the action of data storage.
In addition, when the dynamic search engine 35 of hierarchy type needs the sub-sampling image data, then read and use the stored sub-sampling image data of this data structure, deliver to the dynamic search engine 35 of hierarchy type and do subsequent treatment; When the module in the encoder needs complete solution to analyse image data, then read and use the stored complete solution of this data structure to analyse image data, and the odd even picture element recombinant that will separate returns, delivering to then needs the module of this data to do subsequent treatment.
Fig. 5 is the device calcspar of data that illustrates the storage image of 2 times of the highest sub-samplings according to another preferred embodiment of the present invention, wherein the raw video receiver 51, picture element processor 52, Memory Controller Hub 53, internal memory 54, and the function of data buffer 520 and raw video receiver 31, picture element processor 32, Memory Controller Hub 33, internal memory 34, and the function of data buffer 320 is identical, so do not repeat them here, and present embodiment is to be example with 2 times of sub-samplings, so the buffer in picture element processor 52 is to be one group with the 1st buffer 521 and the 2nd buffer 522, memory region in the internal memory 54 also is to be one group with the 1st memory region 541 and the 2nd memory region 542, and the data width of internal memory 54 and bus is 32 (i.e. 4 pixel points).In order to promote the service efficiency of internal memory 54 and bus, each buffer in the picture element processor 52 can be deposited 8 documents, so Memory Controller Hub 53 is after handling the data of the 1st memory region 541 earlier, handle the data of the 2nd memory region 542 again.Also comprise the dynamic search engine 55 of hierarchy type that receives the sub-sampling image data in addition, and other coding module 56 that receives former resolution image data.
Fig. 6 is the data structure of data that illustrates the storage image of 2 times of the highest sub-samplings according to another preferred embodiment of the present invention.Please be simultaneously with reference to Fig. 5 and Fig. 6, at first receive one 8 * 8 image data 61 by raw video receiver 51, after raw video receiver 51 receives full 4 pixel points, the transfer of data that is about to 32 is given picture element processor 52, and, the 1st buffered data 621 and the 2nd buffering data 622 are deposited in respectively in the 1st buffer 521 and the 2nd buffer 522 according to the address setting of data structure 62.
When the 1st buffer 521 of picture element processor 52 and the data quantity in the 2nd buffer 522 arrive a predetermined value (for example 8 documents), then read the 1st buffering data 621 of the 1st buffer 521 and the 2nd buffering data 622 of the 2nd buffer 522 simultaneously by data buffer control unit 520, and isolate needed even picture element and strange picture element, and obtain the 1st picture element group 631 and the 2nd picture element group 632 of data structure 63.
Then, to do the intersection layout every the picture element of 1 picture element line in this 1st picture element group 631 and the 2nd picture element group 632 by Memory Controller Hub 53, obtain the 1st data memory 641 and the 2nd memory document 642, in last the 1st memory region 541 and the 2nd memory region 542 with this 1st memory document 641 and the 2nd memory document 642 difference write memories 54 again as data structure 64.
Fig. 7 reads the data structure of 2 times of data of sub-sampling according to what another preferred embodiment of the present invention illustrated 2 times of the highest sub-samplings by internal memory.Please be simultaneously with reference to Fig. 5 and Fig. 7, at first read the memory document 711 of the 1st memory region 541 of internal memory 54 by Memory Controller Hub 53 hops, obtain the picture element group 721 of 2 times of sub-samplings, deposit in then in the 1st buffer 521 of picture element processor 52 as the 1st buffering data 731, wherein so-called hop reads typical example as only reading the 1st and the 4th document.Then, repeat the memory document 711 of above-mentioned action in running through the 1st memory region 541, or be filled with till the 1st buffer 521 of picture element processor 52.
Coming then is the memory document 712 that hop reads the 2nd memory region 542 of internal memory 54 again, obtain the picture element group 722 of 2 times of sub-samplings, and deposit in the 2nd buffer 522 of picture element processor 52 as the 2nd buffering data 732, repeat the memory document 712 of above-mentioned steps in running through the 2nd memory region 542, or be filled with till the 2nd buffer 522 of picture element processor 52.
Then, according to the dynamic search engine 55 needed data orders of hierarchy type, read the buffering data 731 of the 1st buffer 521 of picture element processor 52 and the buffering data 732 of the 2nd buffer 522, and obtain the image 74 of 2 times of sub-samplings, and the image 74 of 2 times of this sub-samplings is passed to the dynamic search engine 55 of hierarchy type.
Fig. 8 reads the data structure of former resolution image data according to what another preferred embodiment of the present invention illustrated 2 times of the highest sub-samplings by internal memory.Please be simultaneously with reference to Fig. 5 and Fig. 8, at first read the 1st memory document 811 in the 1st memory region 541 of internal memory 54 continuously by Memory Controller Hub 53, obtain the 1st picture element group 821 of former resolution, deposit in then in the 1st buffer 521 of picture element processor 52 as the 1st buffering data 831.Then, and repeat 1st memory document 811 of above-mentioned action in running through the 1st memory region 541, or be filled with till the 1st buffer 521 of picture element processor 52.
Coming then is the 2nd memory document 812 that reads continuously in the 2nd memory region 542 of internal memory 54 again, obtain the 2nd picture element group 822 of former resolution, and deposit in the 2nd buffer 522 of picture element processor 52 as the 2nd buffering data 832, repeat 2nd memory document 812 of above-mentioned steps in running through the 2nd memory region 542, or be filled with till the 2nd buffer 522 of picture element processor 52.Then, according to other coding module 56 needed data orders, read the 1st buffering data 831 of the 1st buffer 521 in the picture element processor 52 and the 2nd buffering data 832 of the 2nd buffer 522, the odd even picture element recombinant of having separated is returned, and obtain former resolution image 84, and this former resolution image 84 is passed to other coding module 56.
Fig. 9 be according to the present invention again a preferred embodiment illustrate the data structure of data of the storage image of 4 times of the highest sub-samplings, wherein present embodiment is that high magnification is 4 times a sub-sampling data structure.At first according to 4 times the highest sub-sampling multiplying power pixel points is separated, just raw video is made the image that the separation of odd even picture element obtains 2 times of sub-samplings, again the image of 2 times of sub-samplings is done the separation of odd even picture element, and obtains the image data of 4 times of sub-samplings.In order to allow each memory bank can be under all sub-sampling multiplying powers, can both be alternately by access, so be unit with 2 picture element lines earlier, memory region (0 is arrived in the odd even picture element cross-assignment of 2 times of sub-samplings, 1) and (2,3), be unit with 4 picture element lines again, the odd even picture element of 4 times of sub-samplings is intersected layout more separately in memory bank (0,1) and (2,3), be unit with 8 picture element lines at last, data in memory bank 0 and 2 and 1 and 3 are exchanged, so just can get under the situation only storing raw video, obtaining the sub-sampling multiplying power in high efficiency mode is 0,2,4 image data.
Another embodiment of the present invention is the picture element group that makes odd number and even number, is unit with many described picture element lines, and cross arrangement is stored in the memory region of internal memory, makes when reading, and these memory regions can alternately be opened., be unit then, wherein with picture element group cross arrangement in these memory regions of internal memory of odd number and even number with multiple bar chart frame picture element line if adopt the sub-sampling image of picture frame pattern; If adopt the sub-sampling image of figure field mode, then except being unit with multiple bar chart field picture element line, the picture element group of odd number and even number outside the cross arrangement, is also comprised and will belong to picture element group cross arrangement in these memory regions of internal memory of figure field, top picture element line and base map field picture element line in these memory regions of internal memory.
In sum, in the method and device of the data of storage image of the present invention, because of adopting the picture element value of a picture element processor with an image data, separate according to the data width of the high magnification of sub-sampling and internal memory and to be reassembled as a plurality of picture element group, and separate storage is in the different memory regions of internal memory, and be able to only storing the full resolution image data and do not needing to store in addition under the situation of sub-sampling image, can obtain 2 expeditiously nThe sub-sampling image of multiplying power, and and then reduce needed memory headroom and frequency range, and improve the shortcoming that in the past needed to deposit in addition the low resolution image.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; anyly have the knack of this skill person; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking accompanying the claim person of defining.

Claims (10)

1. method that stores the data of image, be convenient to from be stored one store data obtain complete, 2,4 ..., 2 nThe sub-sampling image of multiplying power, the method for the data of this storage image comprises the following steps:
A. with the picture element P of x bar picture element line X, y, be separated into 2 nThe plain group of a series of paintings, be expressed as the 1st, the 2nd respectively ..., the 2nd nThe plain group of a series of paintings, then the picture element of the plain group of the 1st a series of paintings comprises P X, 1,
Figure C2005100718350002C1
..., , the picture element of the plain group of the 2nd a series of paintings comprises P X, 2,
Figure C2005100718350002C3
...,
Figure C2005100718350002C4
By that analogy, the 2nd nThe picture element of the plain group of a series of paintings comprises ,
Figure C2005100718350002C6
, Above k, n, x, y are the positive integer greater than zero; And
B. with the picture element in the plain group of described a series of paintings, recombinate respectively, be stored to different 2 of this internal memory respectively according to a data width of an internal memory nIn the individual memory region.
2. the method for the data of storage image as claimed in claim 1, also comprise the plain group of described a series of paintings of each described picture element line is stored to respectively in the different described memory region of this internal memory, make different described memory regions store the plain group of different described a series of paintings.
3. the method for the data of storage image as claimed in claim 1 also comprises repeating step a., and each described picture element line of this image data all is separated into 2 nThe plain group of a series of paintings.
4. the method for the data of storage image as claimed in claim 3 when the data that stores when described picture element group arrives a data quantity, then with after this data width reorganization according to this internal memory of described picture element group, is stored to respectively in the described memory region of this internal memory.
5. the method for the data of storage image as claimed in claim 3 all is separated into 2 at repeating step a. with each the described picture element line with this image data nAfter the plain group of a series of paintings, and before step b., also comprise the following steps:
Making the plain group of described a series of paintings of odd number and even number, is unit with many described picture element lines, and cross arrangement is stored in the described memory region of this internal memory, makes when reading, and described memory region can alternately be opened.
6. the method for the data of storage image as claimed in claim 5 also comprises the following steps:
If adopt the sub-sampling image of picture frame pattern, be unit then, with the plain group of described a series of paintings cross arrangement in the described memory region of this internal memory of odd number and even number with multiple bar chart frame picture element line.
7. the method for the data of storage image as claimed in claim 5 also comprises the following steps:
If adopt the sub-sampling image of figure field mode, be unit then with multiple bar chart field picture element line, with the plain group of described a series of paintings cross arrangement in the described memory region of this internal memory of odd number and even number, comprising the plain group of described a series of paintings cross arrangement in the described memory region of this internal memory that will belong to figure field, top picture element line and base map field picture element line.
8. device that stores the data of image comprises:
One picture element processor is in order to the picture element P with the x bar picture element line in this image data X, y, be separated into 2 nThe plain group of a series of paintings, be expressed as the 1st, the 2nd respectively ..., the 2nd nThe plain group of a series of paintings, then the picture element of the plain group of the 1st a series of paintings comprises P X, 1,
Figure C2005100718350003C1
,
Figure C2005100718350003C2
The picture element of the plain group of the 2nd a series of paintings comprises P X, 2,
Figure C2005100718350003C3
, By that analogy, the 2nd nThe picture element of the plain group of a series of paintings comprises
Figure C2005100718350003C5
Figure C2005100718350003C6
,
Figure C2005100718350003C7
Above k, n, x, y are the positive integer greater than zero;
One Memory Controller Hub is coupled to this picture element processor, in order to the picture element in the plain group of described a series of paintings, recombinates respectively according to a data width of an internal memory; And
2 nIndividual memory region is coupled to this Memory Controller Hub, in order to store the plain group of described a series of paintings after recombinating, makes different described memory regions store the plain group of different described a series of paintings.
9. the device of the data of storage image as claimed in claim 8, wherein this picture element processor also comprises:
A plurality of data buffers are in order to store a plurality of picture element values of this image data; And
One data buffer control unit, be coupled to described data buffer,, the described picture element value that is stored in the described data buffer be separated into the plain group of described a series of paintings in order to according to the picture element position in this image data, and, store back described data buffer respectively according to this data width.
10. the device of the data of storage image as claimed in claim 9, wherein when described data buffer was filled with described picture element value, then by after this Memory Controller Hub reorganization, plain group deposited in respectively in the described memory region with described a series of paintings.
CNB2005100718357A 2005-05-20 2005-05-20 Video data storing method and apparatus Expired - Fee Related CN100531350C (en)

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