CN103533404B - The method of reseptance of digital broadcast television - Google Patents
The method of reseptance of digital broadcast television Download PDFInfo
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- CN103533404B CN103533404B CN201210230644.0A CN201210230644A CN103533404B CN 103533404 B CN103533404 B CN 103533404B CN 201210230644 A CN201210230644 A CN 201210230644A CN 103533404 B CN103533404 B CN 103533404B
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Abstract
The present invention proposes the method for reseptance of a kind of digital broadcast television.The method of reseptance of described digital broadcast television comprises the following steps: in the broadcasting stage, it is judged that whether the decoded information that program channel is corresponding exists in matching database.If decoded information does not exist in matching database, then judge whether the sum transmitting stratum is one.When the sum of transmission stratum be for the moment, use single stratum iterative decoding mode to decode and transmit stratum, and to update the transmission stratum quantity that the iterative decoding in decoded information is labeled as in enabled status, and carrying recorded decoding information be one.
Description
Technical field
The present invention relates to the method for reseptance of a kind of digital broadcast television, and it is wide to particularly relate to a kind of integrated service numeral
Broadcast the numeral of TV (Integrated Services Digital Broadcasting Television, ISDB-T) system
Broadcast television signal method of reseptance.
Background technology
Being different from general digital broadcasting-television signal, integrated service digital broadcast television has the general of stratum (layer)
Read.One integrated service digital broadcast television channel or frequency spectrum generally can comprise many sub-channels or multiple stratum, such as, include
One high definition (high definition, HD) channel or most three SDs (standard definition, SD) channel.
In general, digital television signal (digital television signal) is to connect through digital television signal
Receive device (receiver) to receive.But, in prior art receives the practice of integrated service digital broadcast television, when to play
The program of one integrated service digital broadcast television, digital TV signal receiver simultaneously parallel multiplexing must process this and comprehensively takes
Many sub-channels in business digital broadcast television channel or frequency spectrum or stratum, with obtain likely be dispersed in many individual sub-channels or
Program (program) content in multiple stratum and the specific information of the program/service information table (Program-of its correspondence
Specific Information/Service Information Table, PSI/SI table).Thereby, DTV letter
Number receptor could play program smoothly.Although recently having and only single stratum being iterated decoding technique and be suggested, to carry
Rise the decoding efficiency receiving digital broadcast television, but still lack at present and effectively combine iterative decoding technology and have multiple with decoding
The method of reseptance of the digital broadcast television of stratum.
Summary of the invention
In view of this, the present invention proposes the method for reseptance of a kind of digital broadcast television, can effectively promote decoded digital wide
Broadcast the usefulness of TV.
The present invention proposes the method for reseptance of a kind of digital broadcast television.According to one embodiment of the invention, described numeral
The method of reseptance of radio and television comprises the following steps: in the broadcasting stage, it is judged that whether the decoded information that program channel is corresponding exists
In matching database；If decoded information does not exist in matching database, then judge whether the sum of at least one transmission stratum is one,
At least a part of which one is transmitted stratum and is included in playing the PSI/SI table needed for program channel and program
Hold；And if the sum of at least one transmission stratum be one, then use single stratum iterative decoding mode to decode transmission stratum, and more
The transmission stratum quantity that iterative decoding in new decoding information is labeled as in enabled status, and carrying recorded decoding information is one.
In one embodiment of this invention, the method for reseptance of described digital broadcast television further includes: when judging program frequency
The decoded information that road is corresponding exists in matching database, then represent and once program channel was carried out automatch.
In one embodiment of this invention, the method for reseptance of described digital broadcast television further includes: if decoded information is not
Exist in matching database and the sum of at least one transmission stratum is not one, then use single stratum iterative decoding mode sequentially to translate
At least one transmission stratum described in Ma.
In one embodiment of this invention, the method for reseptance of described digital broadcast television further includes: when utilizing single rank
Stacking for decoding process sequentially decode described at least one transmission stratum time, it may be judged whether can successfully play program channel；And
If program channel can successfully be play, then update the iterative decoding in decoded information and be labeled as enabled status, update decoded information
In transmission stratum quantity, and in decoded information record there is the PSI/SI table that program channel is corresponding
Transmission stratum stratum's index value.
In one embodiment of this invention, the method for reseptance of described digital broadcast television further includes: if cannot successfully broadcast
Put program channel, then change use non-iterative decoding process decode simultaneously described at least one transmission stratum, and update decoded information
In iterative decoding be labeled as disabled state, and to arrange the stratum's index value in decoded information be prepending non-significant value.
In one embodiment of this invention, the method for reseptance of described digital broadcast television further includes: if programme content pair
The decoded information answered exists in matching database, decodes according to the stratum's index value in decoded information and iterative decoding labelling
Described at least one transmission stratum, and find out the PSI/SI table that program channel is corresponding, and specific according to program
Information/service information table obtains the programme content play needed for program channel.
In one embodiment of this invention, described PSI/SI table includes Program Association Table and joint
Mesh mapping table.
In one embodiment of this invention, the method for reseptance of described digital broadcast television further includes: play the stage it
Before, perform to sweep step section, wherein in sweeping step section only with non-iterative decoding process decode simultaneously described at least one transmission rank
Layer, and the sum of at least one transmission stratum described in record.
Based on above-mentioned, the present invention proposes the method for reseptance of a kind of digital broadcast television, and it is sweeping step section acquirement numeral extensively
Broadcast the sum of the transmission stratum of TV, and judge whether matching database has, in the broadcasting stage, the decoding that program channel is corresponding
Information, and decode at least one transmission stratum according to this decoded information, or decide whether to use single stratum iterative decoding mode
Decode transmission stratum.Thereby, can select to use suitable decoded mode, Jin Eryou for the transmission situation that program channel is corresponding
Effect ground promotes the usefulness of decoded digital radio and television.
For the features described above of the present invention and advantage can be become apparent, special embodiment below, and coordinate institute's accompanying drawings
It is described in detail below.
Accompanying drawing explanation
Fig. 1 is the functional block diagram of the digital broadcast television player of one embodiment of the invention；
Fig. 2 A is the functional block diagram of the forward error correction decoder of Fig. 1；
Fig. 2 B is the schematic diagram of the forward error correction decoder execution single stratum iterative decoding illustrating Fig. 1；
Fig. 3 is that the method for reseptance of the digital broadcast television of one embodiment of the invention is at the schematic flow sheet sweeping step section；
And
Fig. 4 is the method for reseptance schematic flow sheet in the stage of broadcasting of the digital broadcast television of one embodiment of the invention.
Main element symbol description
10: digital broadcast television player
11: front end processing block
12: antenna
15: demodulator
16: forward error correction decoder
1601: forward direction inputoutput multiplexer
1602,1609,1612: internal decoder
1603,1604: temporary computer
1605: frame synchronizer
1606: internal o controller
1607,1610,1613: deinterleaver
1608,1611,1614,1620: descrambler
1615: stratum's controller
1616,1619: outer decoder
1617: disarrangement device
1618: interleaver
1621: the temporary controller of transmission stream
17: demultiplexer
191: audio decoder
193: Video Decoder
14: store media
13: controller
D, D_L1 ~ D_L3: coded data
D1_L1 ~ D1_L3: internal decoding data
D1: the first data
D1 ': synchronize the first data
D1_L1 ': synchronize internal decoding data
D2: the second data
D2_L1 ~ D2_L3: control data
D3: the three data
D3_L1 ~ D3_L3: deinterleaved data
D4: the four data
D4_L1 ~ D4_L3: descrambling random number evidence
D5: the five data
D5_L1-3: integral data
D6, D6 ': the 6th data
D6_L1-3: external decoder data
D7: the seven data
D7_L1-3: transmission flow data
L1 ~ L3: transmission stratum
S302 ~ S308, S402 ~ S420: step
TS, TS ': transmission stream
Detailed description of the invention
Fig. 1 is the functional block diagram of the digital broadcast television player according to one embodiment of the invention.Refer to Fig. 1,
Digital broadcast television player 10 may be used for receiving and playing program channel (the most each digital broadcasting electricity of digital broadcast television
The program channel of television stations).In the present embodiment, the digital broadcasting-television signal that digital broadcast television player 10 receives can be
Such as meet the digital broadcasting-television signal of integrated service digital broadcast television specification (ISDB-T).In other embodiments, number
Word radio and television player also can receive and such as meet Europe rule wireless DVB-T broadcast standard (DVB-T), wired DVB-T
Broadcast standard (DVB-C), U.S. rule advanced television standard committee standard (ATSC), middle rule numerical digit multimedia broadcasting standards (DMB-
TH), the digital broadcasting-television signal such as middle rule ground DVB-T broadcast standard (DTMB), but the embodiment of the present invention is not
It is defined in above-mentioned.
Refer to Fig. 1, digital broadcast television player 10 includes front end processing block 11, controller 13 and stores media
14.Front end processing block 11 is used for receiving and process (comprise demodulation, decode and demultiplex) digital broadcasting-television signal, in order to
Perform the actions such as follow-up program channel search and program channel broadcasting.In the present embodiment, front end processing block 11 can wrap
Include antenna 12, demodulator (demodulator) 15, forward error correction decoder (Forward Error Correction
Decoder, FEC Decoder) 16 and demultiplexer (Demultiplexer) 17.It is wide that antenna 12 is used for receiving DTV
Broadcast signal.Demodulator 15 connects antenna 12, is used for solving the digital TV broadcast signal that modulation is received, and obtains this DTV
One transmission stratum of broadcast singal or multiple transmission stratum.
Forward error correction decoder 16 connects demodulator 15, is used for decoding the one or more of this digital TV broadcast signal
Transmission stratum, to obtain the transmission stream (Transport Stream, TS) in one or more transmission stratum.It is worth mentioning at this
, in the present embodiment, the decoding circuit of forward error correction decoder 16 can be set using single stratum iteration through configuration
Decoding (single layer iterative decoding) and non-iterative decoding (non-iterative decoding) two
Plant decoded mode.Outline below for implementing of both decoded modes.
Fig. 2 A is the functional block diagram of the forward error correction decoder 16 of Fig. 1.Refer to Fig. 2 A, in the present embodiment, front
To error-correcting code decoder 16 include forward direction inputoutput multiplexer (FEC input multiplexer) 1601, internal decoder 1602,
Temporary computer 1603, temporary computer 1604, frame (frame) lock unit 1605, internal o controller 1606, deinterleaver
(de-interleaver) 1607, descrambler (descrambler) 1608, internal decoder 1609, deinterleaver 1610, solve
Disarrangement device 1611, internal decoder 1612, deinterleaver 1613, descrambler 1614, stratum controller (layer
Controller) 1615, outer decoder 1616, disarrangement device (scrambler) 1617, interleaver (interleaver) 1618,
Outer decoder 1619, descrambler 1620 and the temporary controller 1621 of transmission stream.
Include explaining as a example by 3 transmission stratum L1 ~ L3 by decoded digital broadcast television signal below.At this enforcement model
In example, forward direction inputoutput multiplexer 1601 transmission stratum L1 ~ L3 that reception antenna 12 receives simultaneously, and export transmission stratum respectively
Including coded data D_L1 ~ D_L3.Coded data D_L1 is to be delivered directly to internal decoder 1602, and encoded
Data D_L2 and D_L3 are then first to be temporary in after temporary computer 1603,1604 reaches one section of Preset Time to be transmitted the most respectively
To internal decoder 1609,1612.Then, internal decoder 1602,1609,1612 is respectively to coded data D_L1 ~ D_L3
Carry out internal decoding, and export internal decoding data D1_L1 ~ D1_L3 respectively to frame synchronizer 1605 and internal o controller
1606。
Coded data D_L1 after becoming internal decoding data D1_L1 via internal decoder 1602 decoding, frame synchronization
Device 1605 can continue and internal decoding data D1_L1 performs to synchronize computing, and exports the internal decoding data D1_L1 ' of synchronization to interior
Portion's o controller 1606.Then, internal o controller 1606 receives internal decoding data D1_L1 ', D1_L2 ~ D1_L3, root
Produce according to internal decoding data D1_L1 ', D1_L2 ~ D1_L3 and control data D2_L1 ~ D2_L3, and output controls data D2_ respectively
L1 ~ D2_L3 is to deinterleaver 1607,1610,1613.
Deinterleaver 1607,1610,1613 paired domination number respectively is deinterleaved producing deinterleaving according to D2_L1 ~ D2_L3
Data D3_L1 ~ D3_L3, and export deinterleaved data D3_L1 ~ D3_L3 respectively to descrambler 1608,1611,1614.Descrambling
Random device 1608,1611,1614 carry out deinterleaved data D3_L1 ~ D3_L3 respectively solving upset with produce descrambling random number according to D4_L1 ~
D4_L3, and output descrambles random number according to D4_L1 ~ D4_L3 to stratum's controller 1615 respectively.Descrambling integrated by stratum's controller 1615
Random number is integral data D5_L1-3 according to D4_L1 ~ D4_L3.Then, outside integral data D5_L1-3 is carried out by outer decoder 1619
Portion decodes to produce external decoder data D6_L1-3, and exports external decoder data D6_L1-3 to descrambler 1620.Descrambling
External decoder data D6_L1-3 are carried out solving by random device 1620 again to be upset to produce transmission flow data D7_L1-3 to transmission stream temporarily
Memory controller 1621.Finally, the temporary controller 1621 of transmission stream receives and keeps in transmission flow data D7_L1-3, and according to biography
Defeated flow data D7_L1-3 output transport stream TS.
At this it should be noted that the standard function mode of the forward error correction decoder 16 of above-mentioned outline introduction is only the present embodiment
One enforcement example of the non-iterative decoding process being previously mentioned.In other words, in the enforcement example of Fig. 2 A, forward error correction decoder
The non-iterative decoding process of 16 is for all transmission stratum (such as, transmission stratum L1 ~ L3) (or parallel) simultaneously received
Carry out decoding process, therefore it can come according to the coded data (such as coded data D_L1 ~ D_L3) in all transmission stratum
Produce the transmission stream of complete interpretation, thereby ensuring that program channel can completely be play.Embodiments of the present invention are applicable to numeral
Broadcast television signal includes the situation of N number of transmission stratum, and wherein N is positive integer and is more than or equal to 1.
But, above-mentioned non-iterative decoding process consumes relatively multi-system resource (because will be to all of transmission when running
Stratum carries out decoding process), and some program channel required information broadcasting when playing the most only comes through single transmission stratum
Transmission.Therefore, the present embodiment is in addition to using above-mentioned non-iterative decoding process, it is also possible to decode via configuration forward error correction
The electric connection mode of assembly in device 16 circuit, changes into using single stratum iterative decoding mode.Thereby, can effectively alleviate
The error-correcting code decoder 16 power consumption when performing decoding, and single stratum iterative decoding mode can promote the effect of decoding
Energy.
Fig. 2 B is the schematic diagram that the forward error correction decoder 16 of Fig. 1 performs single stratum iterative decoding.At this it should be noted that
Different places between the flow process that the flow process of the single stratum iterative decoding of Fig. 2 B decodes from the non-iterative of Fig. 2 A are forward error correction
The transmission stratum quantity of code decoder 16 interpretation, and the electric connection side of members in forward error correction decoder 16 circuit
Formula, and members execution action changes.
Refer to Fig. 2 B, following with the forward error correction decoder of the transmission stratum L1 of only interpreting digital radio and television
16 illustrate for example.Implement at this in example, the transmission stratum L1 that forward direction inputoutput multiplexer 1601 reception antenna 12 transmits
Coded data D to internal decoder 1602.Coded data D is carried out internal decoding to produce the by internal decoder 1602
One data D1, and export the first data D1(or make internal decoding data) to frame synchronizer 1605.It is right that frame synchronizer 1605 continues
First data D1 perform to synchronize computing and synchronize the first data D1 to produce ', and export synchronization the first data D1 ' (or in making to synchronize
Portion's decoding data) to deinterleaver 1607.
Deinterleaver 1607 is to synchronizing the first data D1 ' it is deinterleaved producing the second data D2, and export the second number
According to D2(or make deinterleaved data) to descrambler 1608.Second data D2 are carried out solving by descrambler 1608 to be upset to produce the
Three data D3, and export the 3rd data D3(or make descrambling random number evidence) to outer decoder 1616.Outer decoder 1616 is to
Three data D3 carry out external decoder to produce the 4th data D4, and export the 4th data D4(or make external decoder data) to upsetting
Device 1617.4th data D4 are upset to produce the 5th data D5 by disarrangement device 1617, and transmit the 5th data D5(or disturb
Random number evidence) to interleaver 1618.Then, interleaver 1618 is interleaved computing to produce the 6th data D6 to the 5th data D5,
And transmit the 6th data D6(or make interleaving data) to temporary computer 1603.
Temporary computer 1603 decides whether to update by the first data D1 temporary before comparison and the 6th data D6
6th data D6 are the 6th data D6 ' (or making internal decoding data).Ensuing decoding handling process then as aforementioned respectively
Step iteration is carried out, and does not repeat constructed content at this.Fig. 2 B illustrates forward error correction decoder 16 and carries out twice iteration fortune
The flow process calculated, but in reality application, the number of times of interative computation then can be adjusted depending on the setting of threshold condition.In other words, this
Bright embodiment is not limited to twice interative computation, and other transmission stratum outside transmission stratum L1 can be performed list
Single order layer iterative decoding.When arriving threshold condition, the 4th data that outer decoder 1616 is exported by descrambler 1620
D4 carries out solution and upsets to produce the 7th data D7, and output the 7th data D7 to transmission flow temporary controller 1621.Finally, transmission stream
Temporary controller 1621 receives and keeps in the 7th data D7(or makees transmission flow data), and according to the 7th data D7 output transmission
Stream TS '.
In other words, single stratum iterative decoding mode the most only can decode for a transmission stratum, and through many
After secondary interative computation, decoded data (are such as received to an acceptable range of error by the Data Convergence after decoding
Hold back within range of error is 10%, or using a threshold value as judging whether to continue executing with the foundation of interative computation), use
Obtain one or more transmission stream of this transmission stratum.If at this it is noted that forward error correction decoder 16 selects with single
Stratum's iterative decoding mode decodes, now forward error correction decoder 16 cannot be simultaneous for multiple transmission stratum carry out also
Row decoding, and can only in order one of them of multiple transmission stratum be decoded.
On the other hand, if from the point of view of with resource required during decoding or decoding efficiency, single stratum iterative decoding is better than non-changing
Generation decoding, because single stratum iterative decoding need not all of transmission stratum is all carried out decoding process, and simply through repeatedly
The mode of generation decoding obtains the Data Convergence value in a transmission stratum, needs the resource taken when therefore can reduce decoding, and
Promote decoding efficiency simultaneously.But, when playing a program channel, if programme content corresponding to this program channel is specific with program
Information/service information table (Program-Specific Information/Service Information Table, PSI/SI
Table) it is to transmit via different transmission stratum, now possibly cannot obtain via single stratum iterative decoding mode simultaneously
Programme content and PSI/SI table, and then cause cannot successfully playing program channel.Additionally, due to it is single
Single order layer iterative decoding is the foundation being used as judging degree of convergence with a threshold value or a range of error, therefore what it finally produced
May there is error slightly with data originally in data, and these errors would potentially result in cannot successfully playing this program
Channel.Accordingly, in an embodiment of the present invention, forward error correction decoder 16 can optionally demand and judge use both translate
One of them of code mode decodes.
Demultiplexer 17 connects forward error correction decoder 16, for demultiplexing the one of forward error correction decoder 16 output
Or multiple transmission stream, and since then transmission stream picks out the PSI/SI table play needed for program channel, enter
And the package identification code (PID) indicated through thus PSI/SI table finds out the joint that this program channel is corresponding
Mesh content.As an example it is assumed that program channel to be play is the program channel A of certain television station, demultiplexer 17 is permissible
Explain the PSI/SI table picking out corresponding this program channel A in the transmission stream translated by oneself, then save according to this
Mesh customizing messages/service information table transmits at this in stream finds out audio frequency package corresponding for this program channel A or video package.
But the present invention is not limited, in another embodiment of the invention, front end processing block 11 can also include
Audio decoder 191 and Video Decoder 193.Audio decoder 191 is connected demultiplexer respectively with Video Decoder 193
17.Demultiplexer 17 obtains program channel that user specifies corresponding audio frequency package PID or video package PID, and according to sound
Frequently package PID or video package PID is by transmitting acquirement audio frequency package or video package in stream.Audio decoder 191 can decode
The audio frequency package of demultiplexer 17 output, to provide the sound of audio output circuit (not illustrating) this program channel of follow-up play.
Video Decoder 193 then decodes the video package of demultiplexer 17 output, to provide video output circuit (not illustrating) continued broadcasting afterwards
Put the image of this program channel.
Referring once again to Fig. 1, store media 14 and connect controller 13, store media 14 and include at least one matched data
Storehouse, wherein matching database is used to store multiple decoded informations that multiple program channel is the most corresponding.In the present embodiment, respectively
Decoded information can include the transmission stratum quantity (or making sum) of television broadcasting signal, iterative decoding labelling (FEC
Iteration label) and stratum's index value (layer index), but embodiment of the present invention is not limited.
Specifically, in the present embodiment, transmission stratum's quantity of television broadcasting signal or the sum of transmission stratum are inevitable
For positive integer, and the sum of transmission stratum's quantity of each television broadcasting signal or transmission stratum can be according to its signal transmitting terminal
Set and perhaps can change.Iterative decoding labelling is used to judge whether the program channel playing this decoded information corresponding fits
By the foundation of single stratum iterative decoding mode, such as, it is expressed as enabled status when the iterative decoding labelling in a decoded information
Time, i.e. represent that the program channel that this decoded information is corresponding is applicable to single stratum iterative decoding mode.When in a decoded information
Iterative decoding labelling when being expressed as disabled state, i.e. represent that the program channel that this decoded information is corresponding is not suitable for single stratum
Iterative decoding mode.
Stratum's index value is used to judge which transmission stratum of digital TV broadcast signal to be carried out single stratum
The foundation of iterative decoding.In other words, front end processing block 11 can judge such as according to the decoded information that a program channel is corresponding
What obtains the programme content package that this program channel is corresponding.Such as, according to transmission stratum's quantity or the sum of transmission stratum, front end
Processing module 11 is appreciated that the total degree that all transmission stratum may sequentially perform single stratum iterative decoding, or
To perform the sum of the transmission stratum of non-iterative decoding simultaneously.The most such as, according to iterative decoding labelling and stratum's index value, front end
Processing module 11 may directly learn that the decoded mode being best suitable for the program channel that user is specified (such as, passes specific
Defeated stratum performs single stratum iterative decoding, or directly all of transmission stratum is performed non-iterative decoding etc.).Need at this
It is noted that above-mentioned labelling or index value can be according to considering and change its record kenel or recording mode in design, this
The embodiment of invention is not limited to above-mentioned.
In one embodiment of this invention, storing media 14 can be various non-volatility memory or a combination thereof, such as
Dynamic Random Access Memory (Dynamic Random Access Memory, DRAM) or SRAM
(Static Random Access Memory, SRAM) etc..It addition, store media 14 separately can include hard disc, laser disc or circumscribed
Storage devices (such as memory card, Portable disk etc.) etc. store media or a combination thereof, at this not to the embodiment mode storing media 14
It is any limitation as.In the present embodiment, matching database can utilize the mode of information bank (database) to embody, but the present invention
Its embodiment mode is not restricted by embodiment.
Controller 13 connects demodulator 15, forward error correction decoder 16, demultiplexer 17 and stores media 14.Control
Device 13 can be used to manage digital broadcast television player 10 overall operation (such as, carry out the judgement of multiple conditional, or
Store reading or the write performing data in media 14).At this it should be noted that controller 13 can be according to the coupling storing media 14
The decoded information that program channel stored in data base is the most corresponding, controls front end processing block 11 and performs decoding or play
Action, described decoding action or playback action were being introduced the most.It addition, in the decoding having performed a program channel every time
Or after the action such as broadcasting, controller 13 can update the decoded information that this program channel is corresponding in this matching database.
In the present embodiment, controller 13 can be microcontroller (micro-controller), embedded controller
(embedded controller) or central processing unit (central processing unit, CPU) etc., but the present invention can be real
Execute mode not above-mentioned to being defined in.
In another embodiment of the invention, digital broadcast television player can also include playing module (not illustrating),
It is connected with front end processing block 11, is used for programme content package (such as, the video package obtained according to front end processing block 11
With audio frequency package) play program channel.
In general, the most complete digital broadcast television playing program can be divided into two stages by outline, and this i.e. sweeps platform
(search) stage and (play) stage of broadcasting.Sweep step section and mainly digital broadcast television is made all-channel scanning (full
Channel scan), use all of program channel of acquisition.Particularly, in the present embodiment, step Duan Shihui mono-is swept in execution
And obtain and store the sum transmitting stratum in digital broadcasting-television signal.The broadcasting stage is then to hold after sweeping step section
OK, after it can receive the program channel that user appointment is to be play, in one or more transmission stratum of digital broadcast television
In find out the programme content package play required for this program channel specified, and play this program channel according to this.
Fig. 3 is that the method for reseptance of the digital broadcast television of one embodiment of the invention is at the schematic flow sheet sweeping step section.
Refer to Fig. 3, after entering the search phase, in step s 302, forward error correction decoder is same with non-iterative decoding process
Time decode all transmission stratum, and by demultiplexer lock all transmission stratum transmission stream.In step s 304, controller is sentenced
Disconnected demultiplexer the most locked transmission stream, wherein, if not yet locking all transmission stream, then repeats after step S304
Step S302；If locked all transmission stream, then continue after step S304 execution step S306.
In step S306, the sum of controller record transmission stratum is to the decoded information in matching database.Such as, control
Device processed can record transmission stratum sum in the storage media 14 of Fig. 1, for follow-up in the broadcasting stage use.In step
In S308, demultiplexer searches for all of program channel, is then departed from the search phase.After having performed to sweep step section, numeral is wide
Broadcast device of televising and can enter the broadcasting stage.
Fig. 4 is the method for reseptance schematic flow sheet in the stage of broadcasting of the digital broadcast television of one embodiment of the invention.
Referring to Fig. 1 and Fig. 4, in step S402, it is assumed herein that controller 13 receives user input via input equipment
Appointed program channel, then controller 13 judges whether the decoded information that this program channel is corresponding exists the coupling storing media 14
In data base.Such as, can to judge that user currently indicates according to an input operation of user to be play for controller 13
Program channel, then controller 13 searches, in the matching database storing media 14, the decoded information that this program channel is corresponding.
If in step S402, controller 13 judges that the decoded information that program channel is corresponding has existed in this matching database, then in step
Continue after rapid S402 execution step S404.It is noted that in the present embodiment, if decoded information corresponding to program channel is
Exist in matching database, i.e. represent controller 13 and once this program channel was carried out automatch (auto
matching procedure).In other words, via automatch, a program channel can be matched to it by controller 13
The decoded mode (the most single stratum iterative decoding mode or non-iterative decoding process) being suitable for and the biography obtaining needs decoding
The quantity etc. of defeated stratum.These coupling information can be recorded in the decoded information that this program channel is corresponding by controller 13 simultaneously,
Wherein this decoded information can include aforesaid transmission stratum's quantity or the transmission sum of stratum, iterative decoding labelling or stratum's rope
Draw value etc..
In step s 404, front end processing block 11 is according to the stratum's index value in decoded information and iterative decoding labelling
Decode transmission stratum.In other words, owing to decoded information the most completely including, this program channel past is via automatch
Produced stratum's index value and iterative decoding labelling, front end processing block 11 can be with record in this decoded information of direct basis
Stratum's index value and iterative decoding labelling decode relevant transmission stratum.With stratum's index value of record in decoded information
For " 1 " and iterative decoding be labeled as " 1 " as example, stratum's index value is that " 1 " represents that program corresponding to this program channel is special
Determine information/service information table to be present in transmitting stratum 1(layer1), it is then to represent single rank that iterative decoding is labeled as " 1 "
In stacking generation, is decoded as enabled status.Accordingly, if front end processing block 11 performs single stratum iterative decoding to transmission stratum 1, and
Can find out the PSI/SI table that this program channel is corresponding, wherein this PSI/SI table can
To include Program Association Table (Program Association Table, PAT) and Program Map Table (Program Map
Table, PMT) etc..Then, front end processing block 11 can be further according to these Program Association Table and Program Map Table etc.
The information of relevant form, obtains the programme content package play needed for this program channel.Such as, according to Program Specific Information/
Service information table, front end processing block 11 can by package identification code (Packet Identifier, PID) find out for
Play audio content package and the video content package of this program channel.Accordingly, front end processing block 11 need not to every time
All transmission stratum decoding of digital broadcast television, and required audio content package can be obtained rapidly and seal with video content
Bag, then plays this program channel.
Turning back in step S402, if controller 13 judges that the decoded information that this program channel is corresponding is not stored in storage
Deposit in the matching database of media 14, then continue after step S402 execution step S406.
In step S406, controller 13 judges whether the sum of at least one transmission stratum is one.For example, control
Device 13 from storing the sum obtaining the transmission stratum recorded in sweeping step section in Fig. 3 in media 14, and can judge forward error correction
Whether the sum of the transmission stratum that code decoder 16 receives is one.If the sum of transmission stratum is one, then after step S406
Continue execution step S408.
In step S408, owing to the sum sweeping step Duan Zhong known transmission stratum at Fig. 3 is one, therefore front-end processing mould
Block 11 can directly utilize single stratum iterative decoding mode and decode this transmission stratum.Then, controller 13 is storing media 14
Matching database updates the iterative decoding labelling in the decoded information of this program channel corresponding, and in carrying recorded decoding information
Transmission stratum quantity.Such as, controller 13 updates the iterative decoding in decoded information and is labeled as enabled status, and carrying recorded decoding
Transmission stratum quantity in information is one.Thereby, when this program channel is required to play again, according to this decoded information, control
Device 13 processed can be to notify that forward error correction decoder 16 uses single stratum iterative decoding mode uniquely to pass to decode this immediately
Defeated stratum.
Please return in step S406, if controller 13 judge the sum of at least one transmission stratum be not one (this i.e., number
Word radio and television have multiple transmission stratum quantity), then continue after step S406 execution step S410.
In step S410, front end processing block 11 utilizes single stratum iterative decoding mode to decode these transmission stratum
One of them, the PSI/SI table corresponding to obtain this program channel.
In step S412, controller 13 judges whether front end processing block 11 can find out program frequency in step S410
The PSI/SI table that road is corresponding, and judged whether can successfully play this program channel by demultiplexer 17.
If demultiplexer 17 judges successfully to play this program channel, then continue after step S412 execution step S414.
In step S414, controller 13 updates the iterative decoding labelling in the decoded information that this program channel is corresponding and biography
Defeated stratum quantity, and record has the biography of PSI/SI table corresponding to this program channel in decoded information
Stratum's index value of defeated stratum.Such as, controller 13 updates this program channel correspondence in the matching database storing media 14
Decoded information in iterative decoding be labeled as enabled status (such as record iterative decoding be labeled as " 1 "), and sweeping according to Fig. 3
The sum of the transmission stratum obtained in step section updates the transmission stratum quantity in this decoded information, simultaneously according to front-end processing
Module 11 obtains the transmission stratum of PSI/SI table corresponding to this program channel, and the most more new decoding letter
(such as record stratum index value is Program Specific Information/service that " 1 " is corresponding to represent program channel to stratum's index value in breath
Information table is to transmit via transmission stratum 1).
Please again return in step S412, if controller 13 or demultiplexer 17 judge cannot successfully play this program frequency
Road, then continue after step S412 execution step S416.
In step S416, it is the most decoded that controller 13 judges whether also to transmit stratum.If also having transmission stratum still
The most decoded, repeated execution of steps S410 after step S416, front end processing block 11 utilize single stratum iterative decoding
Mode decodes the most decoded transmission stratum.If in step S416, controller 13 has judged all transmission stratum the most
Decoded, but demultiplexer 17 judges still cannot successfully play this program channel, then continue after step S416 and perform step
Rapid S418.
In step S418, all could because all of transmission stratum being performed single stratum iterative decoding respectively
Playing smoothly this program channel, now front end processing block 11 can only change employing non-iterative decoding process and decodes all simultaneously
Transmission stratum, and update the iterative decoding labelling in decoded information and stratum's index value.In this case, preferably locate
Reason mode decodes all of transmission stratum, to obtain complete data (or package) for using non-iterative decoding process simultaneously.
In other words, now must via decode simultaneously all of transmission stratum could multiple transmission stratum in accurately find broadcasting this
Programme content package needed for program channel.For example, in such a case, it is possible to decoding corresponding for this program channel is believed
Breath iterative decoding flag update is that " 0 " is to represent that (this i.e. plays this program channel and be not suitable for using single stratum a disabled state
Iterative decoding), and stratum's index value is updated to prepending non-significant value (such as, " 0 "), to represent in this automatch
Learn and cannot have been obtained, by single transmission stratum, the PSI/SI table that this program channel is corresponding, or cannot be suitable
Profit plays this program channel.Thereby, when this program channel again be required play time, can according to this iterative decoding labelling (such as "
0 ") and this stratum's index value (such as " 0 ") and directly use non-iterative decoding process decoding all of transmission stratum, with obtain
PSI/SI table corresponding to program channel and programme content package, and then successfully play this program channel.
In addition, in step S404, S408, S410 and S418, whether use iterative decoding side of single stratum
Formula or non-iterative decoding process are to the decoding of one or more transmission stratum, and its main purpose is all on one or more transmission rank
PSI/SI table corresponding to program channel (such as Program Association Table and Program Map Table) is found out in Ceng, with
And follow-up according to this PSI/SI table obtain play this program channel programme content package.For example,
The multiple package identification codes playing the video package needed for this program channel with audio frequency package can be obtained through Program Association Table,
And in the transmission stream interpreted, capture, according to these package identification codes, video package and the audio frequency envelope that this program channel needs
Bag).Thereby, in follow-up step S420, can successfully play this program channel.
Specifically, in the present embodiment, step S406 ~ S418 can be considered an automatch.Change speech
It, is as long as once performing the program channel of this automatch, required relevant data (the such as television broadcasting signal of decoding
Transmission stratum quantity, the iterative decoding labelling of this program channel corresponding and stratum's index value etc.) all can be recorded in this joint
In the decoded information that mesh channel is corresponding.Then, as long as digital broadcast television player just can be rapidly according to this decoded information
Selection to decode via single stratum iterative decoding mode or non-iterative decoding process, and plays this program channel.
In sum, according to embodiments of the invention, the method for reseptance of described digital broadcast television includes sweeping platform
Stage and the stage of broadcasting.Sweeping step section, the desirable transmission stratum obtaining digital broadcast television of described method.In the stage of broadcasting,
Described method can determine whether whether to have in matching database the decoded information that program channel is corresponding.If matching database has
This decoded information, then decode transmission stratum according to this decoded information.If matching database does not has this decoded information, then continue
Judge the sum of transmission stratum, and decide whether to use single stratum iterative decoding mode to translate according to the sum of transmission stratum
Code transmits stratum.The most also cannot successfully play after using single stratum iterative decoding mode all transmission stratum all to be decoded
During program channel, then use non-iterative decoding process to decode all transmission stratum simultaneously.Thereby, can be corresponding according to program channel
Digital broadcasting-television signal transmission situation, select suitable decoded mode, and then effectively promote decoded digital radio and television
The usefulness of signal.
Although the present invention is disclosed above with embodiment, so it is not limited to the present invention, any art
Middle tool usually intellectual, without departing from the spirit and scope of the present invention, when making a little change and retouching, therefore the present invention
Protection domain when being as the criterion depending on the defined person of appended claims.
Claims (8)
1. a method of reseptance for digital broadcast television, including:
In the stage of broadcasting, it is judged that whether the decoded information that program channel is corresponding exists in matching database；
If this decoded information does not exist in this matching database, then judge whether the sum of at least one transmission stratum is one, wherein
This at least one transmission stratum includes in playing the PSI/SI table needed for this program channel and program
Hold；And
If the sum of this at least one transmission stratum is one, then single stratum iterative decoding mode is used to decode this transmission stratum, and
Update the iterative decoding in this decoded information and be labeled as enabled status, and the transmission stratum quantity recorded in this decoded information is
One,
Wherein, this single stratum iterative decoding mode includes:
The coded data of this transmission stratum is carried out internal decoding to produce the first data；
These first data temporary, and these first data are performed computing to produce the second data；And
According to these first data and the difference value of these the second data, it may be judged whether continue executing with this iterative decoding side of single stratum
Formula,
Wherein, this computing includes:
Carry out these first data synchronizing computing to produce an internal decoding data of synchronization；
Decoding data internal to this synchronization is deinterleaved producing a deinterleaved data；
Carry out this deinterleaved data solving and upset to produce a descrambling random number evidence；
To this descrambling random number according to carrying out external decoder to produce external decoder data；
Upset to produce upset data to these external decoder data；And
These upset data are interleaved computing to produce this second data.
The method of reseptance of digital broadcast television the most according to claim 1, wherein:
When judging that this decoded information that this program channel is corresponding exists in this matching database, then represent once to this program channel
Carry out automatch.
The method of reseptance of digital broadcast television the most according to claim 1, further includes:
If this decoded information does not exist in this matching database and the sum of this at least one transmission stratum is not one, then use this list
Single order stacking sequentially decodes this at least one transmission stratum for decoding process.
The method of reseptance of digital broadcast television the most according to claim 3, further includes:
When utilizing this single stratum iterative decoding mode sequentially to decode this at least one transmission stratum, it may be judged whether can successfully broadcast
Put this program channel；And
If this program channel can successfully be play, then this iterative decoding updated in this decoded information is labeled as enabled status, more
This transmission stratum quantity in this decoded information new, and record has this program that this program channel is corresponding in this decoded information
Stratum's index value of the transmission stratum of customizing messages/service information table.
The method of reseptance of digital broadcast television the most according to claim 4, further includes:
If this program channel cannot successfully be play, then use non-iterative decoding process to decode this at least one transmission stratum simultaneously, and
Update this iterative decoding in this decoded information and be labeled as disabled state, and this stratum's index value arranged in this decoded information is
Prepending non-significant value.
The method of reseptance of digital broadcast television the most according to claim 5, further includes:
If this decoded information that this program channel is corresponding exists in this matching database, according to this stratum's rope in this decoded information
Drawing value and this iterative decoding labelling to decode this at least one transmission stratum, and this program finding out this program channel corresponding is specific
Information/service information table, and this program play needed for this program channel is obtained according to this PSI/SI table
Content.
The method of reseptance of digital broadcast television the most according to claim 1, wherein this PSI/SI table
Including Program Association Table and Program Map Table.
The method of reseptance of digital broadcast television the most according to claim 1, further includes:
Before the broadcasting stage, perform to sweep step section, wherein translate only with non-iterative decoding process in this sweeps step section simultaneously
This at least one transmission stratum of code, and record the sum of this at least one transmission stratum.
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| CN1820507A (en) * | 2003-08-20 | 2006-08-16 | 韩国电子通信研究院 | System and method for digital multimedia broadcasting |
| CN101960726A (en) * | 2008-03-06 | 2011-01-26 | 通用仪表公司 | Method and apparatus for decoding an enhanced video stream |
| CN102326387A (en) * | 2008-12-22 | 2012-01-18 | 韩国电子通信研究院 | Apparatus and method for multiplexig and demultiplxeing based on digitgal multimedia broadcasting |
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| CN1820507A (en) * | 2003-08-20 | 2006-08-16 | 韩国电子通信研究院 | System and method for digital multimedia broadcasting |
| CN101960726A (en) * | 2008-03-06 | 2011-01-26 | 通用仪表公司 | Method and apparatus for decoding an enhanced video stream |
| CN102326387A (en) * | 2008-12-22 | 2012-01-18 | 韩国电子通信研究院 | Apparatus and method for multiplexig and demultiplxeing based on digitgal multimedia broadcasting |
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