CN101370134B - Digital broadcast receiver and method for processing stream of digital broadcast receiver - Google Patents
Digital broadcast receiver and method for processing stream of digital broadcast receiver Download PDFInfo
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- CN101370134B CN101370134B CN 200810148924 CN200810148924A CN101370134B CN 101370134 B CN101370134 B CN 101370134B CN 200810148924 CN200810148924 CN 200810148924 CN 200810148924 A CN200810148924 A CN 200810148924A CN 101370134 B CN101370134 B CN 101370134B
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Abstract
Disclosed is a method of formatting a digital broadcast transport stream packet, a digital broadcast transmitter, and a signal processing method thereof, including constructing a transport stream packet that includes a stuffing region for an insertion of a known supplementary reference signal (SRS) data therein, randomizing the packet that includes the stuffing region is randomized, and the SRS data is inserted into the stuffing region of the randomized packet. Adding a parity for an error correction to the packet into which the SRS data has been inserted, the packet to which the parity has been added is interleaved, and a trellis encoding of the interleaved packet is performed. Inserting a segment sync signal and a field sync signal into the trellis-encoded packet, and a vestigial side band (VSB) modulation and an RF conversion of the packet are performed to transmit the VSB-modulated and RF-converted packet.
Description
The application is to be that May 19, application number in 2006 are 200680017764.5, are entitled as the dividing an application of patent application of " the formatting digital broadcast transport stream packet is to improve method, digital broadcast transmitter and the signal processing method of receptivity " applying date.
Technical field
Aspect of the present invention relates to a kind of method of formatting digital broadcast transport stream packet, a kind of digital broadcast transmitter and signal processing method thereof, more particularly, relate to a kind of by in transport stream packet, producing the self adaptation field, and the position that given data (that is, replenish reference sequences (hereinafter referred to as " SRS ")) is inserted the self adaptation field improved the receptivity of receiving system and keep method, digital broadcast transmitter and signal processing method thereof with the formatting digital broadcast transport stream packet of the compatibility of existing system.
Background technology
Advanced Television Systems Committee (ATSC) residual sideband (VSB) system (American DTB Digital Terrestrial Broadcasting system) is a kind of signal carrier type broadcast system, and uses field sync signal take 312 sections as unit.Fig. 1 is the block diagram that illustrates as the structure of the emittor/receiver of the ATSC DTV standard of general American DTB Digital Terrestrial Broadcasting system.The digital broadcast transmitter of Fig. 1 comprises: randomizer 110 is used for moving picture expert group 2 (MPEG-2) is transmitted stream (TS) randomization; Reed-Solomon (RS) encoder 120 is used for adding the RS parity byte to transmission stream (TS) and processes the bit error that causes owing to the characteristic of channel to correct to transmit.Interleaver 130 is according to the designated mode RS coded data that interweaves.Trellis encoder 140 is by carrying out data-mapping that grid coding will interweave to 8 level symbols (8-level symbol) with 2/3 code check to interleaving data.Digital broadcast transmitter transmits stream to MPEG-2 and carries out error correction coding.
Digital broadcast transmitter comprises that also multiplexer 150 is with the data with segment sync signal and field sync signal insertion error correction coding.Modulator/RF transducer 160 will be by specifying the DC value to insert the data symbol that has inserted segment sync signal and field sync signal, with pilot tone (pilot tone) data inserting symbol, by the data symbol pulse shaping being come the data symbol is carried out the VSB modulation, and be that RF channel band signal is to send this RF channel band signal with the modulated data symbol up conversion.
Therefore, digital broadcast transmitter transmits the stream randomization with MPEG-2, by RS encoder 120 (outer encoder) randomization data is encoded outward, and comes the distributed code data by interleaver 130.In addition, digital broadcast transmitter will be encoded in the interleaving data take 12 symbols as unit by trellis encoder 140, internally coded data is carried out mapping, make it be mapped to 8 level symbols, field sync signal and segment sync signal are inserted coded data, coming data are carried out the VSB modulation by pilot tone being inserted coded data, is that the RF signal is to export this RF signal subsequently with the modulating data up conversion.
Simultaneously, the digital broadcasting transmitter of Fig. 1 comprises: the tuner (not shown), the RF signal down conversion that is used for receiving by channel is baseband signal.The baseband signal of 220 pairs of conversions of demodulator is carried out and is detected synchronously and demodulation.Equalizer 230 compensates the channel distortion of the restituted signal that occurs owing to Multipath Transmission.240 pairs of equalizing signals of grid decoder carry out error correction and equalizing signal are decoded as symbol data.The data rearrangement that deinterleaver 250 will be distributed by the interleaver 130 of digital broadcast transmitter.260 error correction of RS decoder go randomizer 270 to go randomization by the data of RS decoder 260 error correction, and output MPEG-2 transmits stream.
Therefore, the digital broadcasting transmitter of Fig. 1 is baseband signal with RF signal down conversion, to signal demodulation and the equilibrium of conversion, subsequently restituted signal is carried out channel-decoding to revert to primary signal.
The VSB Frame of Fig. 2 has illustrated the insertion used in American digital broadcasting (8-VSB) system segment sync signal and field sync signal.As shown in Figure 2, a frame comprises two.One comprises a field synchronization segments and 312 data segments as first paragraph.In addition, a section in the VSB Frame is corresponding with a MPEG-2 bag, and comprises segment sync signal and 828 data symbols of four symbols.
In Fig. 2, segment sync signal and field sync signal are used for the synchronous and balanced of digital broadcasting transmitter.Namely, field sync signal and segment sync signal refer to the given data between digital broadcast transmitter and the receiver, and this given data is as the reference signal when carrying out equilibrium in receiver side.
Summary of the invention
Technical problem
As shown in Figure 1, the VSB system of American DTB Digital Terrestrial Broadcasting system is single-carrier system, and the defective that therefore has is in having the multipath fading channel circumstance of Doppler effect very weak.Therefore, the performance of receiver is subject to the very large impact of performance for the equalizer of removing multipath fading.Yet according to existing transmission frame as shown in Figure 2, because primary field synchronizing signal (that is, the reference signal of equalizer) appears in per 313 sections, so its frequency is quite low with respect to a frame signal, and this causes equalization performance to descend.
Namely, existing equalizer is not easy to estimate channel and the signal that comes balanced reception by removing multipath fading with above-mentioned low volume data.Therefore, the shortcoming that has of conventional digital broadcasting receiver is: (particularly in Doppler's attenuation channel environment) its receptivity descends in the difference channel environment.
Technical scheme
An aspect of of the present present invention is to provide a kind of and can keeps and the method for the formatting digital broadcast transport stream packet of the compatibility of existing digital broadcast transmitting/receiving system and the signal processing method of digital broadcast transmitter.
Will be in ensuing description part set forth the present invention other aspect and/or advantage, some will be clearly by describing, and perhaps can learn through enforcement of the present invention.
Comprise that for format the method that head and the digital broadcasting of load transmit stream (TS) and wrap (the method comprise known additional reference sequences (SRS) data are inserted this bag) realizes above and other purpose and/or advantage substantially by providing a kind of.
According to an aspect of the present invention, this bag also comprises the self adaptation field, and the SRS data are inserted at least a portion of this self adaptation field.
According to an aspect of the present invention, the self adaptation field comprises the Option Field that is comprised by selectivity, and the SRS data are inserted at least a portion of the self adaptation field except Option Field.
According to an aspect of the present invention, Option Field is program clock reference (PCR), original program clock reference (OPCR), splicing counter (splice countdown), transmits at least one or their combination in proprietary data length and the self adaptation field extension length.
According to an aspect of the present invention, the SRS signal is used for synchronously and/or channel equalization.
In another aspect of this invention, provide a kind of digital broadcast transmitter, comprising: the bag construction unit, make up transport stream packet, this transport stream packet comprises for the fill area of inserting therein known additional reference signal (SRS) data; Randomizer will comprise the bag randomization of fill area; The SRS plug-in unit, the fill area of the SRS data being inserted randomized bag; The RS encoder adds the parity check that is used for error correction to inserted the SRS data bag; Interleaver interweaves the bag that has added parity check; Trellis encoder is carried out grid coding to the bag that interweaves; Multiplexer is with the bag of segment sync signal and field sync signal interpenetration network coding; And modulator/RF transducer, the output signal of multiplexer is carried out vestigial sideband (VSB) modulation and RF change to send the signal that VSB modulation and RF change.
In another aspect of this invention, provide a kind of signal processing method for digital broadcast transmitter, comprising: make up transport stream packet, this transport stream packet comprises for the fill area of inserting therein known additional reference signal (SRS) data; To comprising the bag randomization of fill area; The SRS data are inserted the fill area of randomized bag; Add the parity check that is used for error correction to inserted the SRS data bag; The bag that has added parity check is interweaved; The bag that interweaves is carried out grid coding; Bag with segment sync signal and field sync signal interpenetration network coding; Described bag execution vestigial sideband (VSB) modulation and RF are changed to send the bag that VSB modulates and RF changes.
Beneficial effect
As mentioned above, according to each aspect of the present invention, in digital broadcast transmitter, comprise the self adaptation field of fill area and the SRS signal is inserted the fill area by structure in the MPEG-2 transport stream packet, and in digital broadcasting transmitter by from the input SRS signal that receives and the SRS signal that detects is used for synchronous and balanced, even in poor multi-path channel, also can improve the receptivity of digital broadcasting transmitter.
According to each aspect of the present invention, provide a kind of can with the system of existing American digital broadcast transmitting/receiving system compatibility and valid function.Although the broadcast singal by wireless or wired transmission is described, should be appreciated that, in other aspects of the present invention, can transmit by being recorded in the playback that postpones on the medium.
Description of drawings
By the description of embodiment being carried out below in conjunction with accompanying drawing, these and/or other aspect of the present invention and advantage will become apparent and be easier to understand, wherein:
Fig. 1 is the block diagram that the structure of conventional digital broadcasting (ATSC VSB) emittor/receiver is shown;
Fig. 2 is the diagram that the structure of ATSC VSB Frame is shown;
Fig. 3 is the diagram that the structure of transport stream packet is shown;
Fig. 4 is the diagram that the structure of the head that transmits the self adaptation field that flows is shown;
Fig. 5 to Fig. 9 is the diagram that illustrates according to the various data formats of the MPEG-2 transport stream packet of the self adaptation field of having added byte of padding comprising of each aspect of the present invention;
Figure 10 is the block diagram that illustrates according to the structure of the digital broadcast transmitter of the embodiment of the invention;
Figure 11 illustrates the according to another embodiment of the present invention block diagram of the structure of digital broadcast transmitter;
Figure 12 is the diagram that the input type of MPEG bag according to an aspect of the present invention is shown;
Figure 13 is the exemplary diagram that illustrates according to the structure of the interleaved packet of the embodiment of the invention; With
Figure 14 is the flow chart that illustrates according to the signal processing method of the digital broadcast transmitter of the embodiment of the invention.
Embodiment
Now, describe embodiments of the invention in detail, its example represents in the accompanying drawings, and wherein, identical label represents identical parts all the time.Below by embodiment being described with reference to the drawings to explain the present invention.In addition, because known function or structure will in the fuzzy the present invention of unnecessary details, therefore will be not described in detail.
Fig. 3 and Fig. 4 illustrate the structure according to the MPEG bag of the mpeg system standard of using in the ATSC digital television standard.As shown in Figure 3, MPEG comprises that Sync_Byte, 1 bit transmit bag error indicator symbol, 1 bit load unit begins designator, 1 bit transmission Priority flag, 13 bit PID (Packet Identifier) values, 2 bits transmission scrambler control designator, 2 bit self adaptation fields control designator and 4 bit continuity counters.Load and/or self adaptation field are immediately following the 4 bit continuity counter back that showing.
As shown in Figure 4, in the MPEG bag, use Option Field (for example, program clock reference (PCR), original program clock reference (OPCR), slice_point, transmission proprietary data length, self adaptation field data and self adaptation field extension sign) to send for example information of PCR, OPCR, splicing counter, transmission exclusive data length and self adaptation field extension length.Here, Option Field can be: PCR, as the synchronizing signal of the demodulator of receiver; OPCR is used at receiver record, predetermined and playback program; The splicing counter is the number (each macro block comprises four circuit blocks, Cr piece and Cb piece) of continuous macro block; Transmitting exclusive data length, is the length of the text data of text broadcasting; And self adaptation field extension length.The discontinuous indicator field of 1 bit, 1 bit random access indicator field, 1 bit Basic Flow priority indicator field, 1 bit self adaptation field length field and a signization self adaptation field (flagged adaptation head field) have been shown in addition.
Fig. 5 to Fig. 9 illustrates to insert to replenish canonical sequence (SRS) transmits stream with the MPEG-2 of the various forms of realization transmitter according to an aspect of the present invention diagram.Here, for convenience of explanation, sync byte three bytes afterwards that transmit stream are collectively referred to as normal header, and two bytes of self adaptation field are collectively referred to as self adaptation field (AF) head.Yet, can use the byte of other titles and/or number.
Usually, SRS is the special known array that inserts in the VSB frame of determining, thereby the equalizer of receiver can utilize this known array to alleviate dynamic multi-path and other disadvantageous channel conditions.The equalizer of receiver uses these contiguous sequence (contiguous sequence) to make the channel that oneself adapts to dynamic change.When coder state is forced into known definite state (DTR), process immediately in a predetermined manner subsequently additional " known array " (SRS pattern) of calculating in advance of bit in the special time position of the frame of interleaver input.Because the working method of the interleaver of compatible ATSC will occur in abutting connection with pattern of symbol as known in the known location of symbol in the VSB frame that interleaver output obtains, receiver can be used as the additional equalizer training sequence.Use existing standard mechanism, but according to backward compatibility mode will in transmitting stream (TS) bag, being used to create the data drawing-in system of these known symbol sequences.In MPEG2 self adaptation field, carry this data.Therefore, these existing standards are supported, and have guaranteed compatibility.
The RS encoder of interleaver front calculates the RS parity check.Owing to resetting the TCM encoder, the RS parity byte mistake of calculating and need to being repaired.Therefore additional treatment step relates to the parity error of correcting in the bag of selecting.Have all bags of parity error with their RS parity check recompile.Generation comes parity byte is encoded again with time enough in abutting connection with (52) section byte interleaver device support of the unique time diversity characteristic of having of SRS pattern.The maximum number of the time restriction SRS byte that needs.
Fig. 5 is presented at the structure of the MPEG-2 bag data of the citation form in the VSB system that uses SRS.This MPEG-2 bag data comprise: normal header part (PID (bag sign) that comprises synchronizing signal and three bytes of a byte), self adaptation field (AF) head (comprising the information about the position of byte of padding) of two bytes and the byte of padding of designated length N.The remainder bytes of bag data is with corresponding as the normal flow of general load data.Because the starting position of byte of padding is fixed, therefore adopt about the information of the length of byte of padding and express information about byte location.The byte of padding length N can be in 1 to 27 scope.
Fig. 6 to Fig. 9 illustrates has the self adaptation field effectively to use the pack arrangement of SRS, comprises other information such as program clock reference (PCR), original program clock reference (OPCR), splicing counter (splice_count) etc. in the self adaptation field.In these cases, the self adaptation field is configured to has unified size.Except AF head and corresponding with the byte of padding that will insert SRS such as the part the information of PCR, OPCR, splice_count etc.To understand, except the pack arrangement that shows among Fig. 6 to Fig. 9, according to each aspect of the present invention, exist make up the various ways of the transport stream packet with the fill area of in the zone except the zone of the Option Field of self adaptation field, inserting SRS.
Figure 10 is the block diagram that illustrates according to the structure of the digital broadcast transmitter of the embodiment of the invention.With reference to Figure 10, digital broadcast transmitter comprises multiplexer (MUX) 320 behind TS multiplexer (MUX) 310, the TS, randomizer 330, SRS plug-in unit 340, RS encoder 350, data interleaver 360, trellis encoder 370, backward compatibility parity generator 380 and multiplexer 390.TS MUX310 receiver, video stream and audio stream, and make up existing MPEG transport stream packet.MUX320 is formed for the fill area of SRS data insertion from the transport stream packet of TS MUX310 output behind the TS, and exports this MPEG and transmit stream.(but being not limited to) shows by suitably moving for example example of the stream of the position of PCR, OPCR, splicing counter, transmission proprietary data length, self adaptation field extension length and other data in Fig. 6 to Fig. 9.
Randomizer 330 transmits the flow data randomization to improve the utilization of the channel space of distributing with the MPEG-2 of input.SRS plug-in unit 340 produces SRS.SRS is the specified sequence (for example training sequence) with the designated mode of arranging in advance between transmitter-side and receiver side.SRS plug-in unit 340 is replaced the byte of padding in the byte of padding position of randomization data with SRS.Because SRS and load data are differentiable (the SRS pattern are sent out/receive), so can easily be detected and for synchronous and balanced at receiver side SRS.
When SRS plug-in unit 340 exchanged byte of padding in bag, RS encoder 350 wrapped to correct because the error that channel causes by bag data execution RS coding is added to the parity check of specified bytes.Interleaver 360 interweaves to having added from the packet of the parity check of RS encoder 350 output with designated mode.Trellis encoder 370 will be converted to data symbol from the data of interleaver 360 outputs, and come data symbol DO symbol is shone upon by the grid coding of 2/3 code check.
According to an aspect of the present invention, will to be stored in the value initialization in himself the storage arrangement be designated value to trellis encoder 370 temporarily.For example, initialized value can be " 00 " state.No matter what this value is, carries out initialization in the starting point of SRS.370 pairs of these data of trellis encoder are carried out grid coding.In addition, trellis encoder 370 will output to for the value of initializes memory backward compatibility parity generator 380, the new parity check that reception is produced by backward compatibility parity generator 380, and with the corresponding existing parity check of new parity check replacement that receives, carry out grid coding thereby use from the new parity check of backward compatibility parity generator 380 receptions.
The output of trellis encoder 370 and next memory state are subject to the impact of previous memory value.Namely, if previous input changes, then will change for initialized input.If with the parity check of the corresponding bag of initialization area in the initialization area front, then because the new parity check that produces, the input value that before had been used for the memory of initialization trellis encoder 370 is changed.In this case, can not carry out initialization, perhaps use the initial value of correcting to produce accurate parity check.Therefore, according to aspects of the present invention, for the parity check that prevents initial package in the front of prime area, the maximum quantity of the byte of padding that the aspect is used according to the present invention becomes 27.Yet, should be appreciated that, for the bag of other types of the section that is divided into other numbers, can adopt other maximum numbers of the byte of padding of use.
According to an aspect of the present invention, backward compatibility parity generator 380 is by using from the initialize memory value of trellis encoder 370 inputs, produce new parity check to carry out RS coding (that is, the MPEG-2 of RS coding being wrapped again the RS coding) from the MPEG-2 bag of RS encoder 350 inputs.Backward compatibility parity generator 380 sends to trellis encoder 370 with the parity check that produces.Should be appreciated that, if do not need backward compatibility, then do not need to comprise generator 380.
MUX390 comes bag, segment sync signal and the field sync signal of multiplexing grid coding by the bag with segment sync signal and field sync signal interpenetration network coding.The modulator (not shown) is carried out the VSB modulation to the bag that has inserted segment sync signal and field sync signal, modulation is wrapped be transformed to RF channel band signal to send this RF channel band signal.
Figure 11 illustrates the according to another embodiment of the present invention block diagram of the structure of digital broadcast transmitter.In this embodiment, the direct audio reception of MUX420 and video input behind the TS (need not the MUX by TS), and the execution operation identical with the structure of Figure 10.In this case, MUX420 is not added to the TS MUX for SRS VSB behind the TS, but is considered to the new TSMUX for SRS VSB.
Consistent with Figure 10, randomizer 430 transmits the flow data randomization to strengthen the utilization of the channel space of distributing with the MPEG-2 of input.SRS plug-in unit 440 produces the SRS of the specified sequence with the designated mode of arranging in advance between launch party and recipient, and replaces the byte of padding in the byte of padding position of randomization data with SRS.RS encoder 450 by the bag data are carried out RS encode with the parity check of specified bytes add to exchanged byte of padding by SRS plug-in unit 440 bag to correct because the error that channel produces.Interleaver 460 interweaves to having added from the packet of the parity check of RS encoder 450 output with designated mode.Trellis encoder 470 will be converted to data symbol from the data of interleaver 460 output, and the grid coding by 2/3 code check comes data symbol DO symbol is shone upon.
As shown, trellis encoder 470 is designated value (for example, being initialized as " 00 " state) in the value initialization that the starting point of SRS will be stored in its oneself the storage arrangement temporarily, and data are carried out grid coding.In addition, trellis encoder 470 is used for the value of initializes memory to backward compatibility parity generator 480 outputs, the new parity check that reception is produced by backward compatibility parity generator 480, and replace with the new parity check that receives and to have accordingly parity check now.
The output of trellis encoder and next memory state are subject to the impact of previous memory value.Namely, if previous input changes, then will change for initialized input.If with the parity check of the corresponding bag of initialization area in the initialization area front, then because the new parity check that produces, the input value that before had been used for the memory of initialization trellis encoder 470 is changed.In this case, can not carry out initialization, perhaps, use the initialization value of correcting to produce accurate parity check.Therefore, for the parity check that prevents the initialization bag in the front of initialization area, the maximum number of the byte of padding of use becomes 27.
Backward compatibility parity generator 480 is by using from the initialize memory value of trellis encoder 470 inputs, encode to produce parity check to carrying out RS from the MPEG-2 bag of RS encoder 450 inputs, and the parity check that produces is sent to trellis encoder 470.Yet being appreciated that of the present invention does not need generator 480 aspect all.
MUX490 comes bag, segment sync signal and the field sync signal of multiplexing grid coding by the bag with segment sync signal and field sync signal interpenetration network coding.The modulator (not shown) is carried out the VSB modulation to the bag that has inserted segment sync signal and field sync signal, and modulation wrapped is transformed to RF channel band signal and sends RF channel band signal.
Figure 12 is the diagram that illustrates according to the exemplary input type of the MPEG of each aspect of the present invention bag, thereby can effectively operate SRS VSB.312 MPEG are included in the VSB field.The bag that comprises for example PCR, OPCR, splicing counter, transmits the information of proprietary data length and self adaptation field extension length in 312 bags can be transfused at assigned address as shown in drawings.For example when 312 sections take 52 sections as unit when being divided, the position of Option Field can followingly represent:
Program clock reference (PCR) (using 6 bytes): 52n+15, n=0;
Original program clock reference (OPCR) (using 6 bytes): 52n+15, n=1;
Self adaptation field extension length (using 2 bytes): 52n+15, n=2;
Transmit proprietary data length (using 5 bytes): 52n+15, n=3,4,5; With
Splicing counter (using 1 byte): 52n+19, n=0,1,2,3,4,5.
SRS VSB can be revised effectively to use with various forms in the formation of MPEG bag as shown in Figure 5 and the position of the bag of MPEG as shown in figure 12.
Figure 13 is the exemplary diagram that illustrates according to the structure of the bag that interweaves of the embodiment of the invention.Because compatible, for example the mpeg information of PCR should be received as it is, therefore, can not use it for initialization or SRS pattern.Therefore, use the mpeg information of the transmission stream part of not initialization trellis encoder 370 by transmission, can reduce to lose.
As shown in figure 12, when PCR or OPCR used at position 52n+15,5 bytes in 6 bytes of PCR or OPCR were used in the empty part of not using known symbol, and this known symbol that causes a byte only (namely, losing 4 symbols), and lose generation without any training.In addition, be less than in transmission in the situation of information of 5 bytes, known symbol do not occur lose.In Figure 12, splice_count is sent out at position 52n+19.The empty part of not using known symbol by as shown in figure 13 sends splice_count, splice_count can in the situation that known symbol be sent out without any losing.Have in use in the situation of MPEG bag of said structure, receiver as training sequence, specifically, for equalizer (for example is with the zone of the SRS except OPCR and PCR zone, equalizer 230) and/or the given value of forward error correction decoder (for example, decoder 240).
Below, the embodiment of the method for compatible operations SRS VSB when explaining after not having TS MUX.When the coated input of MPEG data randomizer 330, the self adaptation field control sign of randomizer 330 usefulness Fig. 3 judges whether the self adaptation field exists.As shown, the self adaptation field control sign of Fig. 3 has the sign (00) of reservation, does not have the self adaptation field to only have the sign of load (01), only has the self adaptation field not have the sign (10) of load and the sign (11) of self adaptation field back subsequent load.If the self adaptation field exists, then data randomizer 330 uses sign as shown in Figure 4 to judge whether OPCR, splicing_point, transport_private_data and adaptation_field_exension exist.If even have a sign, then it is replaced and need not to carry out byte of padding by corresponding bag.
In this case, the trellis encoder 370 of Figure 10 and backward compatibility parity generator 380 are encoded and initialize memory and need not that training sequence is carried out RS with existing VSB processing mode pack processing again.In this processing, the bag of carry information does not change, thereby can send without distortion this bag.
Reflector can send this information by sending to receiver about the information of training regional change with reserved part.In addition, receiver will be by using described information the given value that acts on equalizer and backward error correction as training sequence about the information of training the zone.
Figure 14 is the flow chart that illustrates according to the signal processing method that is used for digital broadcast transmitter of the embodiment of the invention.With reference to Fig. 6 a and Fig. 9, TS MUX310 receiver, video stream and audio stream, and make up transport stream packet.MUX320 makes up the transport stream packet (S910) that comprises be used to the fill area of inserting known SRS data behind the TS.Randomizer 330 will comprise the bag randomization (S920) of fill area.SRS plug-in unit 340 inserts the SRS signal fill area (S930) of randomized bag.
Although the stream that comprises Voice ﹠ Video is shown, should be appreciated that according to aspects of the present invention this stream can comprise other data.
Although be not to need in all respects, should be appreciated that, aspect of the present invention can be embodied as hardware, software or its combination.Although shown and described some embodiments of the present invention, it will be apparent to one skilled in the art that in situation about not breaking away from by the principle of the present invention of claim and equivalent limited range thereof and spirit, can change this embodiment.
Utilizability on the industry
Aspect of the present invention relates to a kind of method for the formatting digital broadcast transport stream packet, a kind of digital broadcast transmitter and signal processing method thereof, more particularly, relate to a kind of by in transport stream packet, producing the self adaptation field and the position that given data (that is, replenishing reference sequences " SRS ") is inserted the self adaptation field being improved the receptivity of receiving system and keep method, a kind of digital broadcast transmitter and signal processing method thereof with the formatting digital broadcast transport stream packet of the compatibility of existing system.
Claims (2)
1. digital broadcasting transmitter comprises:
Tuner receives stream and the stream that receives is carried out down conversion from digital broadcast transmitter;
Demodulator carries out demodulation to the stream of down conversion;
Equalizer carries out equilibrium to the stream of demodulation;
Grid decoder carries out trellis decode to the stream of equilibrium;
Deinterleaver deinterleaves to the stream of trellis decode;
The RS decoder carries out the RS decoding to the stream that deinterleaves; With
Remove randomizer, remove the stream of randomization RS decoding,
Wherein, in digital broadcast transmitter, training sequence be inserted into randomized stream be used to inserting the specific region of training sequence, even-odd check for error correction is added to the stream that has inserted training sequence, the stream that has added even-odd check is interleaved and by the trellis encoder grid coding, segment sync signal and field sync signal are inserted into the stream of grid coding, and the stream that has inserted segment sync signal and field sync signal is performed vestigial sideband VSB modulation and by RF, is changed to send the stream of VSB modulation and RF conversion
Wherein, trellis encoder is designated value in the value initialization that the starting point of training sequence will be stored in himself the storage arrangement temporarily.
2. method of processing the stream of digital broadcasting transmitter comprises:
Receive stream from digital broadcast transmitter, the stream that receives is carried out down conversion, and the stream of down conversion is carried out demodulation;
Stream to demodulation carries out equilibrium;
Stream to equilibrium carries out trellis decode;
Stream to trellis decode deinterleaves;
The stream that deinterleaves is carried out the RS decoding; With
Remove the stream of randomization RS decoding,
Wherein, in digital broadcast transmitter, training sequence be inserted into randomized stream be used to inserting the specific region of training sequence, even-odd check for error correction is added to the stream that has inserted training sequence, the stream that has added even-odd check is interleaved and by the trellis encoder grid coding, segment sync signal and field sync signal are inserted into the stream of grid coding, and the stream that has inserted segment sync signal and field sync signal is performed vestigial sideband VSB modulation and by RF, is changed to send the stream of VSB modulation and RF conversion
Wherein, trellis encoder is designated value in the value initialization that the starting point of training sequence will be stored in himself the storage arrangement temporarily.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US68330405P | 2005-05-23 | 2005-05-23 | |
| US60/683,304 | 2005-05-23 | ||
| US72489805P | 2005-10-11 | 2005-10-11 | |
| US60/724,898 | 2005-10-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2006800177645A Division CN101180881A (en) | 2005-05-23 | 2006-05-19 | Method for formatting digital broadcast transport stream packet for improved receiving performance, digital broadcast transmitter, and signal processing method thereof |
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| Publication Number | Publication Date |
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| CN101370134A CN101370134A (en) | 2009-02-18 |
| CN101370134B true CN101370134B (en) | 2013-05-01 |
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| CNA2006800177645A Pending CN101180881A (en) | 2005-05-23 | 2006-05-19 | Method for formatting digital broadcast transport stream packet for improved receiving performance, digital broadcast transmitter, and signal processing method thereof |
| CN 200810148924 Expired - Fee Related CN101370134B (en) | 2005-05-23 | 2006-05-19 | Digital broadcast receiver and method for processing stream of digital broadcast receiver |
| CN 200810148923 Expired - Fee Related CN101370133B (en) | 2005-05-23 | 2006-05-19 | Digital broadcast receiver and method for processing stream of digital broadcast receiver |
| CN 200810148922 Expired - Fee Related CN101370132B (en) | 2005-05-23 | 2006-05-19 | Digital broadcast receiver and method for processing stream of digital broadcast receiver |
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| CNA2006800177645A Pending CN101180881A (en) | 2005-05-23 | 2006-05-19 | Method for formatting digital broadcast transport stream packet for improved receiving performance, digital broadcast transmitter, and signal processing method thereof |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810148923 Expired - Fee Related CN101370133B (en) | 2005-05-23 | 2006-05-19 | Digital broadcast receiver and method for processing stream of digital broadcast receiver |
| CN 200810148922 Expired - Fee Related CN101370132B (en) | 2005-05-23 | 2006-05-19 | Digital broadcast receiver and method for processing stream of digital broadcast receiver |
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| Country | Link |
|---|---|
| CN (4) | CN101180881A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1497918A (en) * | 2002-10-08 | 2004-05-19 | 三星电子株式会社 | Single carrier transmission system able to adapting change of dynamic environment and its method |
| US6785733B1 (en) * | 1997-09-05 | 2004-08-31 | Hitachi, Ltd. | Transport protocol conversion method and protocol conversion equipment |
| US6810084B1 (en) * | 2000-06-12 | 2004-10-26 | Munhwa Broadcasting Corporation | MPEG data frame and transmit and receive system using same |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1011224B1 (en) * | 1998-10-02 | 2009-08-19 | Thomson Consumer Electronics, Inc. | Data rate conversion |
| US6430159B1 (en) * | 1998-12-23 | 2002-08-06 | Cisco Systems Canada Co. | Forward error correction at MPEG-2 transport stream layer |
| AU4710501A (en) * | 1999-12-03 | 2001-06-18 | Broadcom Corporation | Interspersed training for turbo coded modulation |
| US20030099303A1 (en) * | 2001-06-04 | 2003-05-29 | Koninklijke Philips Electronics N.V. | Digital television (DTV) transmission system using enhanced coding schemes |
| EP1537745A1 (en) * | 2002-09-06 | 2005-06-08 | Koninklijke Philips Electronics N.V. | Packet insertion mechanism for an improved atsc dtv system |
-
2006
- 2006-05-19 CN CNA2006800177645A patent/CN101180881A/en active Pending
- 2006-05-19 CN CN 200810148924 patent/CN101370134B/en not_active Expired - Fee Related
- 2006-05-19 CN CN 200810148923 patent/CN101370133B/en not_active Expired - Fee Related
- 2006-05-19 CN CN 200810148922 patent/CN101370132B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6785733B1 (en) * | 1997-09-05 | 2004-08-31 | Hitachi, Ltd. | Transport protocol conversion method and protocol conversion equipment |
| US6810084B1 (en) * | 2000-06-12 | 2004-10-26 | Munhwa Broadcasting Corporation | MPEG data frame and transmit and receive system using same |
| CN1497918A (en) * | 2002-10-08 | 2004-05-19 | 三星电子株式会社 | Single carrier transmission system able to adapting change of dynamic environment and its method |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2000-188614A 2000.07.04 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101370133B (en) | 2013-05-01 |
| CN101370133A (en) | 2009-02-18 |
| CN101370132B (en) | 2013-11-06 |
| CN101180881A (en) | 2008-05-14 |
| CN101370132A (en) | 2009-02-18 |
| CN101370134A (en) | 2009-02-18 |
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