CN102595236B - A kind of method of Set Top Box and changing channels of digital television thereof - Google Patents
A kind of method of Set Top Box and changing channels of digital television thereof Download PDFInfo
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Abstract
The invention discloses a kind of method of changing channels of digital television, described method comprises: receive zapping instruction; Judge that according to described zapping instruction described zapping target channel is whether in preparation zapping group; If be judged as YES, use Program Map Table PMT and the Entitlement Control Message ECM data of the described target channel of buffer memory in advance, realize zapping; If be judged as NO, receive the PMT of described target channel, after analysis, open audio frequency and video and ECM passage, receive ECM, realize zapping; Realize after zapping, rebuild preparation zapping group. The invention also discloses a kind of Set Top Box. By the way, the present invention can shorten the time of changing channels of digital television, improves user and experiences.
Description
Technical field
The present invention relates to digital television techniques field, particularly relate to a kind of Set Top Box and numeral electricity thereofDepending on the method for zapping.
Background technology
Current domestic CADTV integral motion completes substantially, and televiewer has started extensivelyUse digital television signal to watch program. Compare over traditional anolog TV signals, numeral electricityHave view reception effect good depending on signal, antijamming capability is strong, can transmit multiple digitalized data increment industryThe features such as business. And DTV utilizes digitalization compressed coding and multiplex technique, can be formerCan only transmit on the frequency of an analog channel and transmit 4～10 cover digital channels, greatly abundantTelevision channel quantity. The digital channel now having broadcasted has reached more than 200 covers, but thereuponAlso bring a problem, all the time, television program receiving spectators have custom, like forward or toAfter according to the rendition list order switching channels fast, may interested program or only to searchOnly in order to while away the time, and now because the increase of digital channel quantity switches one by all channelsThe cycle of wheel is obviously elongated, waste user's plenty of time.
Prior art DTV switches the principle of program, digital television system comprise a road orMulti-channel tv programs data and some additional information on services (Serviceinformation, SI) numberAccording to etc., in each TV programme, comprise one or more audio frequency and video elementary stream (ElementaryStreams, ES) data. These data-reusings (MUX) grouping is packaged into different MPTSs(TransportStream, TS) grouping, with unique this number of a 13bits numeral flag of systemAccording to type, wrap identifier (Packetidentification, PID). Set Top Box demodulation module lockFrequently after, receive MPTS, then first analyze SI data, then to the data in TS stream, according to PIDCarry out demultiplexing (DEMUX), obtain ES stream and then the broadcasting of decoding, if scramblingProgram, also need additionally to receive Entitlement Control Message (EntitlementControlMessage,ECM), after intelligent card in processing ECM, obtain descrambled control words (CW) and send into set top box decodes coreAfter the descrambling passage of sheet, audio frequency and video could normally be broadcasted. Single-definition digital television machine top nowThe main flow demultiplexing decoding chip that box uses can provide very strong demultiplexing multichannel disposal ability,Such as just supporting 48 PID passages, STi5105 is used for synchronously processing audio frequency and video and packet.
Illustrate that below by detailed description of the invention prior art DTV switches the method for program,Suppose that, from A channel zapping to B channel, common zapping flow process is first to close the sound of A channelVideo and descrambling passage and ECM receive path also stop Conditional Access (CA) descrambling, asFruit A and B different frequent points, Set Top Box will first lock B channel place frequency, program receiving afterwardsContingency table (ProgramAssociationTable, PAT), finds the Program Map Table of B channelThe PMTPID of (ProgramMapTable, PMT), receives that PMT post analysis obtains B frequentlyThe audio frequency and video PID in road and ECMPID also start CA descrambling, open subsequently the sound of decoding chipVideo decode and descrambling passage and ECM receive path, now still can't see audio/video program,Receive ECM and by intelligent card in processing after obtain CW, send into after the descrambling passage of decoding chipCould normally show and complete zapping one time by audio/video program. As can be seen here, the fastest zapping situationBe that A and B do not have scrambling with frequency and B channel, the slowest zapping situation is that A and B need notFrequency and the scrambling of B channel.
Although DTV STB has generally used the self-defined classification of user's favor program now, frontEnd is broadcast the method such as program classification and is helped that user selects, searches, switching channels, but zapping at every turnAll to first close PMT and the ECM receive path of previous channel, then open target channelPMT and ECM receive path, only have the ECM of waiting until to receive and give after CA resume moduleJust can complete zapping. Like this when user is when forward or backward according to the rendition list order fast channel switchingEfficiency be very low, affect user watched experience.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of Set Top Box and changing channels of digital television thereofMethod, can shorten time of changing channels of digital television, improve user and experience.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: a kind of number is providedThe method of word TV zapping, the method comprises: build preparation zapping group, be specially: calculate preparationThe upper limit of zapping group, if demultiplexing chip is except normal open wireless tunnel and the shared passage of current channelOutward, residue X vacant passage, and if each channel need Y passage to do pre-zapping,M=X/Y, M is the upper limit of preparation zapping group; Calculate preparation zapping group, if current channel is iIndividual channel Oi, wherein i belongs to 1 to N, first records the direction of a front zapping, taking i asInitial point, recording zapping direction is the direction reducing along i or the direction increasing along i; Then fromChannel Oi starts to calculate to zapping direction, if arrive the border of frequency, and 1 or N, also do not haveBe accumulated to the upper limit M of preparation zapping group, calculate until accumulative total along the direction of zapping opposite directionChannel number reaches M, completes the structure of preparation zapping group; Or start to zapping side from channel OiTo reckoning, do not run into frequency border but accumulative total channel number reached M, complete preparation changeThe structure of platform group. Receive zapping instruction; According to zapping, instruction judges that zapping target channel is whether in advanceIn standby zapping group; If be judged as YES, use the Program Map Table of the target channel of buffer memory in advancePMT and Entitlement Control Message ECM data, realize zapping; If be judged as NO, receiving targetThe PMT of channel, opens audio frequency and video and ECM passage after analysis, receive ECM, realizes zapping;Realize after zapping, rebuild preparation zapping group.
Wherein, comprise after rebuilding the step of preparation zapping group: open the preparation rebuildingThe PMT of the channel of zapping group and ECM passage; The channel of the preparation zapping group that buffer memory rebuildsAll PMT and ECM data.
Wherein, receive zapping instruction step and comprise afterwards: close the audio frequency and video passage of current channel,The PMT of current channel and ECM passage stay open.
Wherein, if M is less than (N-1), on current frequency except the channel of playing, (N-1)M in individual channel channel forms preparation zapping group; Wherein, X, Y, M and N are positive integer.
Wherein, comprise after building the step of preparation zapping group: open the channel of preparation zapping groupPMT and ECM passage; All PMT and the ECM data of the channel of buffer memory preparation zapping group.
Wherein, after the step of reception zapping instruction, comprise: judge zapping target channel and current frequencyWhether road is same frequency; If be judged as NO, directly close the demultiplexing core of preparation zapping groupSheet passage, zapping is after target channel, and reconstruct prepares zapping group.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: a kind of machine is providedTop box, this Set Top Box comprises: build module, for building preparation zapping group, refer to receive zappingZapping is carried out in order; Build module specifically for: calculate the upper limit of preparation zapping group, if demultiplexing coreSheet except normal open wireless tunnel and the shared passage of current channel, X vacant passage of residue, and ifEach channel needs Y passage to do pre-zapping, M=X/Y, and M is the upper limit of preparation zapping group;Calculate preparation zapping group, if current channel is i channel Oi, wherein i belongs to 1 to N, headFirst record the direction of a front zapping, taking i as initial point, recording zapping direction is to reduce along iDirection or along i increase direction; Then start to calculate to zapping direction from channel Oi, if arriveReach the border of frequency, 1 or N, be not also accumulated to the upper limit M of preparation zapping group, along changingThe direction of platform opposite direction is calculated until the channel number of accumulative total reaches M, completes preparation zapping groupBuild; Or start to calculate to zapping direction from channel Oi, do not run into the border of frequency but accumulative totalChannel number has reached M, completes the structure receiver module of preparation zapping group, for receiving zappingInstruction; The first judge module, for according to zapping, instruction judges that whether zapping target channel is in preparationIn zapping group; The first zapping module, in the judged result of the first judge module when being, makeBy Program Map Table PMT and the Entitlement Control Message ECM data of the target channel of buffer memory in advance,Realize zapping; The second zapping module, when being no in the judged result of the first judge module, connectsThe PMT that receives target channel, opens audio frequency and video and ECM passage after analysis, receive ECM, realizesZapping; Reconstructed module, for realizing after zapping, rebuilds preparation zapping group.
Wherein, Set Top Box also comprises: first opens module, rebuilds preparation for reconstructed moduleAfter zapping group, open PMT and the ECM passage of the channel of the preparation zapping group rebuilding; TheOne cache module, all PMT of the channel of the preparation zapping group rebuilding for buffer memory andECM data.
Wherein, Set Top Box also comprises: closing module, receive after zapping instruction for receiver module,Close the audio frequency and video passage of current channel, the PMT of current channel and ECM passage stay open.
Wherein, build module specifically for: when the channel quantity of a certain frequency is N, if M is greater thanEqual (N-1), on current frequency except the channel of playing, other all channels formPreparation zapping group; If M is less than (N-1), on current frequency except the channel of playing,(N-1) M channel in individual channel forms preparation zapping group; Wherein, X, Y, M and NFor positive integer.
Wherein, Set Top Box also comprises: second opens module, for building module construction preparation zappingAfter group, open PMT and the ECM passage of the channel of preparation zapping group; The second cache module, usesPrepare all PMT and the ECM data of the channel of zapping group in buffer memory.
Wherein, Set Top Box also comprises: the second judge module, receives zapping instruction for receiver moduleAfter, judge whether zapping target channel and current channel are same frequency; The 3rd zapping module,For while being no, directly closing the demultiplexing of preparation zapping group in the judged result of the second judge moduleChip channel, zapping is after target channel, and reconstruct prepares zapping group.
The invention has the beneficial effects as follows: be different from the situation of prior art, the present invention receives zapping and refers toAfter order, judge that whether zapping target channel is preparing in zapping group, if in preparation zapping group,Just can use Program Map Table PMT and the mandate of the target channel of buffer memory in advance of preparation zapping groupControl information ECM data, receive the process of PMT and ECM while having skipped prior art zapping,Save the zapping time, realized fast channel switching; If, in preparation zapping group, do not use existingSome zapping technology, i.e. the PMT of receiving target channel, opens audio frequency and video and ECM logical after analysisRoad, receives ECM, realizes zapping. Realize after zapping, need to rebuild preparation zapping group, withGuarantee that the channel that is about to conversion is as much as possible in preparation zapping group. By the way, the present inventionCan shorten the time of changing channels of digital television, improve user and experience.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of method one embodiment of changing channels of digital television of the present invention;
Fig. 2 is the schematic flow sheet of another embodiment of method of changing channels of digital television of the present invention;
Fig. 3 is the schematic flow sheet of the another embodiment of method of changing channels of digital television of the present invention;
Fig. 4 is the structural representation of Set Top Box one embodiment of the present invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in detail.
Fig. 1 is the schematic flow sheet of method one embodiment of changing channels of digital television of the present invention, specifically realExecute step as follows:
Step 101, receives zapping instruction;
After the zapping instruction that Set Top Box reception user sends, the audio frequency and video of first closing current channel are logicalRoad, but the PMT of current channel and ECM passage are stayed open. Wherein, each numeral frequentlyThe passage that road uses is approximately 4, comprises 1 PMT, 1 road video, 1 road audio frequency, 1ECM。
Step 102, according to zapping, instruction judges that zapping target channel is whether in preparation zapping group;
PMT and ECM that in prior art, each zapping all will first be closed current channel receive logicalRoad, then open PMT and the ECM receive path of target channel, only has under ECM receives by the timeAfter giving CA resume module, just can complete zapping. Like this when user is forward or backward according to jointEfficiency when order tab sequential fast channel switching is very low.
In whole zapping process, although frequency locking and CA module are to these two parts of the processing of ECMConsuming time more, but the technical characterstic that is subject to DTV self cannot avoid, so the present invention is to usingMultiple possibility channels that family is about to switch be made a prediction, and build preparation zapping group, pass through structureThe preparation zapping group of building, connects PMT and the ECM data in advance of the channel that belongs to preparation zapping groupTake down and buffer memory, to improve zapping speed.
Lower mask body is introduced preparation zapping group constructive method and the corresponding pre-zapping that the present invention proposesTechnology, is ensureing under the prerequisite of normal zapping time, the zapping of buffer memory preparation as far as possible in advance groupPMT and ECM data, shorten the zapping time next time, to improve zapping efficiency.
First calculate the upper limit of preparation zapping group, if demultiplexing chip is except normal open wireless tunnel and current frequencyOutside the shared passage in road, X vacant passage of residue, and if each channel need Y passage to doPre-zapping, M=X/Y, M is the upper limit of preparation zapping group. Wherein, X and Y are positive integer,M value is got its integer part.
Illustrate the upper limit of calculating preparation zapping group below as an example of STi5105 example, STi5105 separatesMultiplexer is supported 48 PID passages, and wherein some passage need to often be opened, and comprises PAT, barPart access list (ConditionalAccessTable, CAT), network information table (NetworkInformationTable, NIT), SDT Service Description Table (ServiceDescriptionTable, SDT),Event Information Table (EventInformationTable, EIT), time and date table (TimeDateTable, TDT), Entitlement Management Message (EntitledManageMessage, EMM), addFor the passage that value-added service data retain such as advertisement etc., remaining can be for audio/video program usePassage is probably 36. The passage that each digital channel uses is approximately 4, comprise 1 PMT,1 road video, 1 road audio frequency, 1 ECM, remove the current channel of watching, also surplus 32Vacant passage, and our pre-zapping target is advanced processing PMT and ECM, thus this 32Individual vacant passage has the pre-zapping ability of processing 16 channels. Certainly this numeral in actual applicationsCan be very different according to the difference of the configuration of front end broadcasting system, such as single channel multichannelAudio frequency, audio frequency and video respectively scrambling or many CA all can increase with close etc. the passage that single channel takiesQuantity.
The upper limit M that has had preparation zapping group, also needs a prediction algorithm to form preparation zappingGroup. This algorithm, except being subject to the restriction of M, is also subject to the restriction of frequency, because exhausted on present marketGreat majority are all single-frequency point Set Top Boxes, thus want pre-zapping in ensureing to watch current channel,All channels of that preparation zapping group all must be with current viewing channel at same frequency. Suppose oneThe channel quantity of individual frequency is N, if M is more than or equal to (N-1), that is to say that demodulation multiplexer canTo provide pre-zapping ability to all channels of current frequency, on current frequency except playingChannel beyond all other channels formed preparation zapping group. If M is less than (N-1), separateMultiplexer can only be for except the channel of playing, and M in remaining (N-1) individual channel frequentlyRoad provides pre-zapping. Wherein, N is positive integer.
Here introduce in detail the system of selection of M channel in preparation zapping group, if current channel is theI channel Oi, wherein i belongs to 1 to N, first records the direction of a front zapping, with iFor initial point, the direction that records zapping is the direction reducing along i or the direction increasing along i.
Then start to calculate to the zapping direction of record from channel Oi, if arrive the border of frequency,1 or N, be not also accumulated to the upper limit M of preparation zapping group, along the zapping direction phase of recordAnti-direction is calculated until the channel number of accumulative total reaches M, completes the structure of preparation zapping group. OrStart to calculate to the zapping direction of record from channel Oi, do not run into the border of frequency but add up frequentlyRoad sum has reached M, completes equally the structure of preparation zapping group.
Wherein, to there being the Set Top Box of multiple-tuned ability, because preparation zapping group has not had frequency restriction,Only use M as the upper limit, according to channel sequencing reconstruct preparation zapping group, can be to greatest extentUtilize demultiplexing chip multichannel disposal ability to realize pre-zapping.
Wherein, switch for the channel in preparation zapping group, needn't be according to channel order,Can shorten equally the time of changing channels of digital television.
Therefore, Set Top Box is receiving after zapping instruction, whether need to judge the target channel of zappingIn preparation zapping group, carry out zapping to determine by prior art, still use side of the present inventionMethod is carried out zapping.
Step 103, if be judged as YES, is used the Program Map Table of the target channel of buffer memory in advancePMT and Entitlement Control Message ECM data, realize zapping;
If need the target channel of zapping in preparation zapping group, take out the PMT of buffer memory in advanceWith ECM data, while having skipped prior art zapping, receive the process of PMT and ECM, realizeFast channel switching.
Step 104, if be judged as NO, the PMT of receiving target channel, opens sound and looks after analysisFrequency and ECM passage, receive ECM, realizes zapping;
If need the target channel of zapping not in preparation zapping group, by the side of prior artMethod is carried out zapping, i.e. the PMT of receiving target channel opens audio frequency and video and ECM passage after analysis,Receive ECM, realize zapping.
Above-mentioned situation is to need the target channel of zapping and the current channel situation at same frequency, whenThe target channel that needs zapping and current channel, in the time of identical frequency, are not just directly closed original preparationThe all passages of zapping group, use prior art normal zapping to reconstruct preparation zapping again after target channelGroup realizes pre-zapping. Therefore, the present invention can not have greatly improved for the speed across frequency zapping.
Step 105, realizes after zapping, rebuilds preparation zapping group.
Realize after zapping, taking the channel after zapping as starting point, according to above-mentioned structure preparation zapping groupMethod rebuild preparation zapping group. After preparation zapping group has built, close and exit in advancePMT and the ECM passage of the channel of standby zapping group are opened the frequency that newly adds preparation zapping group simultaneouslyThe PMT in road and ECM passage, and all PMT and the ECM data of buffer memory preparation zapping group,Wherein, PMT only upgrades in the time that MPEGsection version changes, and ECM only needs buffer memory up-to-dateA section.
In sum, the present invention proposes one and utilizes the powerful multichannel place of Set Top Box demultiplexing chipReason ability realizes the method for pre-zapping, utilizes demultiplexing chip idle channel to receive and buffer memory preparationThe PMT of zapping group and ECM data, reducing the zapping time, and proposed preparation zapping groupConstitution principle and method. By the present invention, user habit is pressed to the channel order situation of zapping successively,Can obviously shorten the time of zapping, especially when the logic sequence of channel is suitable with its physics in frequencyWhen order is basically identical, can bring into play maximum efficiency.
Be different from the situation of prior art, the present embodiment receives after zapping instruction, judges zapping targetWhether channel is preparing in zapping group, if in preparation zapping group, just can use preparation zappingOrganize Program Map Table PMT and the Entitlement Control Message ECM data of the target channel of buffer memory in advance,While having skipped prior art zapping, receive the process of PMT and ECM, saved the zapping time, realShow fast channel switching; If, in preparation zapping group, do not use existing zapping technology, connectThe PMT that receives target channel, opens audio frequency and video and ECM passage after analysis, receive ECM, realizesZapping. Realize after zapping, need to rebuild preparation zapping group, to guarantee to be about to the channel of conversionAs much as possible in preparation zapping group. By the way, the present invention can shorten DTV and changesThe time of platform, improve user and experience.
Fig. 2 is the schematic flow sheet of another embodiment of method of changing channels of digital television of the present invention, as figureShown in, concrete implementation step is as follows:
Step 201, builds preparation zapping group;
Step 202, opens PMT and the ECM passage of the channel of preparation zapping group;
Step 203, all PMT and the ECM data of the channel of buffer memory preparation zapping group;
Step 204, receive zapping instruction, and whether instruction judges zapping target channel according to zappingIn preparation zapping group;
Receive after zapping instruction, need to close the audio frequency and video passage of current channel, but make current channelPMT and ECM passage stay open.
Step 205, if be judged as YES, is used the Program Map Table of the target channel of buffer memory in advancePMT and Entitlement Control Message ECM data, realize zapping;
Step 206, if be judged as NO, the PMT of receiving target channel, opens sound and looks after analysisFrequency and ECM passage, receive ECM, realizes zapping;
Step 207, realizes after zapping, rebuilds preparation zapping group.
For the preparation zapping group rebuilding, appoint and so need to open the preparation zapping group rebuildingPMT and the ECM passage of channel, and the institute of the channel of the preparation zapping group that rebuilds of buffer memoryThere are PMT and ECM data.
Fig. 3 is the schematic flow sheet of the another embodiment of method of changing channels of digital television of the present invention, as figureShown in, concrete implementation step is as follows:
Step 301, builds preparation zapping group, to carry out zapping;
Step 302, judges after the instruction of reception zapping whether zapping target channel and current channel are sameA frequency;
Step 303, if be judged as NO, directly closes the demultiplexing chip channel of preparation zapping group,Zapping is after target channel, and reconstruct prepares zapping group.
If not at same frequency, carry out zapping according to existing zapping technology, zapping is to targetAfter channel, rebuild preparation zapping group according to the frequency at target channel place.
Wherein, if the judged result of step 302 is target channel and the current channel that needs zappingWhether at same frequency, so just continuing judgement needs the target channel of zapping in preparation zapping groupIn, ensuing operating in the embodiment shown in Fig. 1, is described later in detail, at this no longerRepeat.
Be different from the situation of prior art, the present invention receives after zapping instruction, judges that zapping target frequentlyRoad, whether preparing in zapping group, if in preparation zapping group, just can use preparation zapping groupThe Program Map Table PMT of the target channel of buffer memory and Entitlement Control Message ECM data in advance,While having skipped prior art zapping, receive the process of PMT and ECM, saved the zapping time, realShow fast channel switching; If, in preparation zapping group, do not use existing zapping technology, connectThe PMT that receives target channel, opens audio frequency and video and ECM passage after analysis, receive ECM, realizesZapping. Realize after zapping, need to rebuild preparation zapping group, to guarantee to be about to the channel of conversionAs much as possible in preparation zapping group. By the way, the present invention can shorten DTV and changesThe time of platform, improve user and experience.
Fig. 4 is the structural representation of Set Top Box one embodiment of the present invention, as shown in the figure, and Set Top Box bagDraw together: receiver module 41, the first judge module 42, the first zapping module 43, the second zapping module44, reconstructed module 45, first open module 46, the first cache module 47, closing module 48,Build module 49, second open module 50, the second cache module 51, the second judge module 52 withAnd the 3rd zapping module 53.
Wherein, receiver module 41 is for receiving zapping instruction; The first judge module 42 is for basisZapping instruction judges that zapping target channel is whether in preparation zapping group; The first zapping module 43 useIn in the judged result of the first judge module 42 when being, use the target channel of buffer memory in advanceProgram Map Table PMT and Entitlement Control Message ECM data, realize zapping; The second zapping mouldPiece 44 when being no in the judged result of the first judge module 42, the PMT of receiving target channel,After analysis, open audio frequency and video and ECM passage, receive ECM, realize zapping; Reconstructed module 45Be used for realizing after zapping, rebuild preparation zapping group; First opens module 46 for reconstruct mouldPiece 45 rebuilds after preparation zapping group, opens the PMT of the channel of the preparation zapping group rebuildingWith ECM passage; The channel of the preparation zapping group that the first cache module 47 rebuilds for buffer memoryAll PMT and ECM data; Closing module 48 receives zapping instruction for receiver module 41After, closing the audio frequency and video passage of current channel, the PMT of current channel and ECM passage keep beatingOpen; Build module 49 for building preparation zapping group, carry out zapping to receive zapping instruction; TheTwo open module 50 builds after preparation zapping groups for building module 49, opens preparation zapping groupThe PMT of channel and ECM passage; The second cache module 51 is for the frequency of buffer memory preparation zapping groupAll PMT in road and ECM data; The second judge module 52 receives and changes for receiver module 41After platform instruction, judge whether zapping target channel and current channel are same frequency; The 3rd zappingModule 53 when being no in the judged result of the second judge module 52, is directly closed preparation zappingThe demultiplexing chip channel of group, zapping is after target channel, and reconstruct prepares zapping group.
Wherein, build module 49 specifically for: calculate the upper limit of preparation zapping group, if demultiplexingChip except normal open wireless tunnel and the shared passage of current channel, X vacant passage of residue, andIf each channel needs Y passage to do pre-zapping, M=X/Y, M is the upper of preparation zapping groupLimit; Wherein, when the channel quantity of a certain frequency is N, if M is more than or equal to (N-1), currentOn frequency, except the channel of playing, other all channels form preparation zapping group; If M is littleIn (N-1), on current frequency except the channel of playing, (N-1) M in individual channelIndividual channel forms preparation zapping group; Wherein, X, Y, M and N are positive integer; Calculate to prepare and changePlatform group, if current channel is i channel Oi, wherein i belongs to 1 to N, first records lastThe direction of inferior zapping, taking i as initial point, record zapping direction and be the direction that reduces along i orThe direction increasing along i; Then start to calculate to zapping direction from channel Oi, if arrive the limit of frequencyBoundary, 1 or N, be not also accumulated to the upper limit M of preparation zapping group, along zapping opposite directionDirection calculate until the channel number of accumulative total reaches M, complete the structure of preparation zapping group; Or fromChannel Oi starts to calculate to zapping direction, does not run into the border of frequency but adds up channel numberThrough reaching M, complete the structure of preparation zapping group.
The work function of the each module of Set Top Box is as follows, and Set Top Box of the present invention is realized in the process of zapping,Before zapping, first need to build module 49 and build preparation zapping group, enter to receive zapping instructionRow zapping, builds module 49 and builds after preparation zapping groups, and second opens module 50 opens preparation and changeThe PMT of the channel of platform group and ECM passage, by the second cache module 51 buffer memory preparation zappingsAll PMT and the ECM data of the channel of group.
Send zapping instruction user, receiver module 41 receives after zapping instruction, and first judges mouldAccording to zapping, instruction judges that zapping target channel is whether in preparation zapping group to piece 42, sentences when firstThe judged result of disconnected module 42 is when being, and the first zapping module 43 is used the target frequency of buffer memory in advanceThe Program Map Table PMT in road and Entitlement Control Message ECM data, realize zapping; When firstWhen the judged result of judge module 42 is no, the PMT of the second zapping module 44 receiving target channels,After analysis, open audio frequency and video and ECM passage, receive ECM, realize zapping.
No matter what mode to realize zapping by, realize after zapping, reconstructed module 45 rebuildsPreparation zapping group, to guarantee that the channel that is about to conversion is as much as possible in preparation zapping group. Reconstruct mouldPiece 45 rebuilds after preparation zapping group, and first opens module 46 opens the preparation rebuilding and changeThe PMT of the channel of platform group and ECM passage, rebuild by the first cache module 47 buffer memorysAll PMT and the ECM data of channel of preparation zapping group, during for zapping next time, use.
Wherein, receive after zapping instruction at receiver module 41, closing module 48 need to be closed currentThe audio frequency and video passage of channel, but the PMT of current channel and ECM passage are stayed open.
, receive after zapping instruction at receiver module 41, the second judge module 52 also needs to sentence meanwhileWhether disconnected zapping target channel and current channel are same frequency, if the second judge module 52Judged result is no, and the 3rd zapping module 53 is directly closed the demultiplexing chip of preparation zapping groupPassage, zapping is after target channel, and reconstruct prepares zapping group.
Be different from the situation of prior art, the present embodiment receives after zapping instruction, judges zapping targetWhether channel is preparing in zapping group, if in preparation zapping group, just can use preparation zappingOrganize Program Map Table PMT and the Entitlement Control Message ECM data of the target channel of buffer memory in advance,While having skipped prior art zapping, receive the process of PMT and ECM, saved the zapping time, realShow fast channel switching; If, in preparation zapping group, do not use existing zapping technology, connectThe PMT that receives target channel, opens audio frequency and video and ECM passage after analysis, receive ECM, realizesZapping. Realize after zapping, need to rebuild preparation zapping group, to guarantee to be about to the channel of conversionAs much as possible in preparation zapping group. By the way, the present invention can shorten DTV and changesThe time of platform, improve user and experience.
The foregoing is only embodiments of the invention, not thereby limit the scope of the claims of the present invention,Every equivalent structure or conversion of equivalent flow process that utilizes description of the present invention and accompanying drawing content to do, orDirectly or indirectly be used in other relevant technical fields, be all in like manner included in patent of the present invention and protectProtect in scope.
Claims (10)
1. a method for changing channels of digital television, is characterized in that, described method comprises:
Build preparation zapping group, be specially:
Calculate the upper limit of preparation zapping group, if demultiplexing chip is except normal open wireless tunnel and current channel instituteOutside the passage taking, residue X vacant passage, and if each channel need Y passage to do in advance to changePlatform, M=X/Y, M is the upper limit of preparation zapping group;
Calculate preparation zapping group, if current channel is i channel Oi, wherein i belongs to 1 to N,First record the direction of a front zapping, taking described i as initial point, record described zapping directionThe direction reducing along i or the direction increasing along i; Then start to zapping direction from channel OiCalculate, if arrive the border of frequency, 1 or N, be not also accumulated to the upper limit of preparation zapping groupM, calculates until the channel number of accumulative total reaches M along the direction of zapping opposite direction, completes instituteState the structure of preparation zapping group; Or start to calculate to zapping direction from channel Oi, do not run into frequentlyPoint border but accumulative total channel number reached M, complete the structure of described preparation zapping group;
Receive zapping instruction;
Judge that according to described zapping instruction zapping target channel is whether in preparation zapping group;
If be judged as YES, use the Program Map Table PMT of the described target channel of buffer memory in advanceWith Entitlement Control Message ECM data, realize zapping;
If be judged as NO, receive the PMT of described target channel, after analysis, open audio frequency and video andECM passage, receives ECM, realizes zapping;
Realize after zapping, rebuild preparation zapping group.
2. method according to claim 1, is characterized in that,
After the described step that rebuilds preparation zapping group, comprise:
PMT and the ECM passage of the channel of the preparation zapping group rebuilding described in opening;
All PMT and the ECM data of the channel of the preparation zapping group rebuilding described in buffer memory.
3. method according to claim 1, is characterized in that,
After described reception zapping instruction step, comprise:
Close the audio frequency and video passage of current channel, the PMT of described current channel and ECM passage are protectedHold and open.
4. method according to claim 1, is characterized in that,
The upper limit of described calculating preparation zapping group, if demultiplexing chip is except normal open wireless tunnel and current frequencyOutside the shared passage in road, X vacant passage of residue, and if each channel need Y passage to doPre-zapping, M=X/Y, M is that the upper limit step of preparation zapping group comprises:
When the channel quantity of a certain frequency is N, if M is more than or equal to (N-1), on current frequencyExcept the channel of playing, other all channels form preparation zapping group; If M is less than(N-1), on current frequency except the channel of playing, (N-1) M in individual channelChannel forms preparation zapping group; Wherein, X, Y, M and N are positive integer;
After the step of described structure preparation zapping group, comprise:
Open PMT and the ECM passage of the channel of described preparation zapping group;
Described in buffer memory, prepare all PMT and the ECM data of the channel of zapping group.
5. method according to claim 1, is characterized in that,
After the step of described reception zapping instruction, comprise:
Judge whether described zapping target channel and current channel are same frequency;
If be judged as NO, directly close the demultiplexing chip channel of described preparation zapping group, zappingAfter described target channel, reconstruct preparation zapping group.
6. a Set Top Box, is characterized in that, described Set Top Box comprises:
Build module, for building preparation zapping group, carry out zapping to receive zapping instruction;
Described structure module specifically for:
Calculate the upper limit of preparation zapping group, if demultiplexing chip is except normal open wireless tunnel and current channel instituteOutside the passage taking, residue X vacant passage, and if each channel need Y passage to do in advance to changePlatform, M=X/Y, M is the upper limit of preparation zapping group;
Calculate preparation zapping group, if current channel is i channel Oi, wherein i belongs to 1 to N,First record the direction of a front zapping, taking described i as initial point, record described zapping directionThe direction reducing along i or the direction increasing along i; Then start to zapping direction from channel OiCalculate, if arrive the border of frequency, 1 or N, be not also accumulated to the upper limit of preparation zapping groupM, calculates until the channel number of accumulative total reaches M along the direction of zapping opposite direction, completes instituteState the structure of preparation zapping group; Or start to calculate to zapping direction from channel Oi, do not run into frequentlyPoint border but accumulative total channel number reached M, complete the structure of described preparation zapping group;
Receiver module, for receiving zapping instruction;
The first judge module, for judging that according to described zapping instruction zapping target channel is whether in advanceIn standby zapping group;
The first zapping module, in the judged result of described the first judge module when being, useThe Program Map Table PMT of the described target channel of buffer memory and Entitlement Control Message ECM number in advanceAccording to, realize zapping;
The second zapping module, when being no in the judged result of described the first judge module, receivesThe PMT of described target channel, opens audio frequency and video and ECM passage after analysis, receive ECM, realExisting zapping;
Reconstructed module, for realizing after zapping, rebuilds preparation zapping group.
7. Set Top Box according to claim 6, is characterized in that, described Set Top Box comprises:
First opens module, rebuilds after preparation zapping group for described reconstructed module, opens instituteState PMT and the ECM passage of the channel of the preparation zapping group rebuilding;
The first cache module, all for the channel of the preparation zapping group that rebuilds described in buffer memoryPMT and ECM data.
8. Set Top Box according to claim 6, is characterized in that, described Set Top Box comprises:
Closing module, receives after zapping instruction for described receiver module, closes the sound of current channelVideo channel, the PMT of described current channel and ECM passage stay open.
9. Set Top Box according to claim 6, is characterized in that,
Described structure module specifically for:
When the channel quantity of a certain frequency is N, if M is more than or equal to (N-1), on current frequencyExcept the channel of playing, other all channels form preparation zapping group; If M is less than(N-1), on current frequency except the channel of playing, (N-1) M in individual channelChannel forms preparation zapping group; Wherein, X, Y, M and N are positive integer;
Described Set Top Box also comprises:
Second opens module, after described structure module construction preparation zapping group, opens described pre-PMT and the ECM passage of the channel of standby zapping group;
The second cache module, for described in buffer memory, prepare zapping group channel all PMT andECM data.
10. Set Top Box according to claim 6, is characterized in that, described Set Top Box comprises:
The second judge module, receives after zapping instruction for described receiver module, judges described zappingWhether target channel and current channel are same frequency;
The 3rd zapping module, when being no in the judged result of described the second judge module, directlyClose the demultiplexing chip channel of described preparation zapping group, zapping arrives after described target channel, reconstructPreparation zapping group.
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Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103297852A (en) * | 2013-06-07 | 2013-09-11 | 华为终端有限公司 | Channel change speed improving method, device and system |
| US9420323B2 (en) * | 2013-12-19 | 2016-08-16 | The Nielsen Company (Us), Llc | Methods and apparatus to verify and/or correct media lineup information |
| CN105430489B (en) * | 2014-09-18 | 2019-01-25 | 青岛海信宽带多媒体技术有限公司 | A kind of switching method of television channel, device and equipment |
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| CN105245941B (en) * | 2015-09-30 | 2018-06-12 | 青岛海信宽带多媒体技术有限公司 | A kind of encrypted television program switching method and device |
| CN106658162A (en) * | 2015-11-03 | 2017-05-10 | 中兴通讯股份有限公司 | Channel changing method, channel changing device and set-top box |
| CN105847947A (en) * | 2016-03-25 | 2016-08-10 | 海信电子科技（深圳）有限公司 | Method and apparatus for acquiring program data information |
| CN107645671A (en) * | 2016-07-22 | 2018-01-30 | 南京中兴新软件有限责任公司 | Program switching method and device |
| CN106341727A (en) * | 2016-10-08 | 2017-01-18 | 北京邦天信息技术有限公司 | Channel switching method and apparatus, and video terminal |
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| CN107396175A (en) * | 2017-08-16 | 2017-11-24 | 四川长虹电器股份有限公司 | A kind of method of optimization IPTV channel switch speed |
| CN107750011A (en) * | 2017-11-03 | 2018-03-02 | 泾县吉祥纸业有限公司 | A kind of DTV multithreading channel switching method and system |
| CN108777813B (en) * | 2018-06-28 | 2021-04-20 | 广州视源电子科技股份有限公司 | Switching method, device, terminal and storage medium of scrambled digital television program |
| CN109618219B (en) * | 2018-12-28 | 2021-11-23 | 中国移动通信集团江苏有限公司 | Method, device, equipment and storage medium for quickly changing channel of network television |
| CN114449357A (en) * | 2020-11-02 | 2022-05-06 | 青岛海信宽带多媒体技术有限公司 | Method, device and terminal for optimizing IPTV multicast channel switching |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1691762A (en) * | 1999-10-06 | 2005-11-02 | Lg电子株式会社 | Channel control apparatus of digital television and method thereof |
| CN101202901A (en) * | 2007-10-17 | 2008-06-18 | 深圳市同洲电子股份有限公司 | Method, device and system for processing package identifier of program transmission package |
| CN101667208A (en) * | 2009-09-25 | 2010-03-10 | 深圳创维数字技术股份有限公司 | Digital television receiver and methods for searching and switching programs thereof |
| CN101883232A (en) * | 2010-07-30 | 2010-11-10 | 福建新大陆通信科技股份有限公司 | Quick channel search method of set top box |
| CN102149013A (en) * | 2011-03-29 | 2011-08-10 | 深圳创维数字技术股份有限公司 | Data processing system and method for digital television as well as digital television receiving terminal |
-
2012
- 2012-01-31 CN CN201210021856.8A patent/CN102595236B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1691762A (en) * | 1999-10-06 | 2005-11-02 | Lg电子株式会社 | Channel control apparatus of digital television and method thereof |
| CN101202901A (en) * | 2007-10-17 | 2008-06-18 | 深圳市同洲电子股份有限公司 | Method, device and system for processing package identifier of program transmission package |
| CN101667208A (en) * | 2009-09-25 | 2010-03-10 | 深圳创维数字技术股份有限公司 | Digital television receiver and methods for searching and switching programs thereof |
| CN101883232A (en) * | 2010-07-30 | 2010-11-10 | 福建新大陆通信科技股份有限公司 | Quick channel search method of set top box |
| CN102149013A (en) * | 2011-03-29 | 2011-08-10 | 深圳创维数字技术股份有限公司 | Data processing system and method for digital television as well as digital television receiving terminal |
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| Publication number | Publication date |
|---|---|
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