CN102307321A - Digital television reception terminal, front end server and data synchronization method - Google Patents
Digital television reception terminal, front end server and data synchronization method Download PDFInfo
- Publication number
- CN102307321A CN102307321A CN201110254782A CN201110254782A CN102307321A CN 102307321 A CN102307321 A CN 102307321A CN 201110254782 A CN201110254782 A CN 201110254782A CN 201110254782 A CN201110254782 A CN 201110254782A CN 102307321 A CN102307321 A CN 102307321A
- Authority
- CN
- China
- Prior art keywords
- time stamp
- synchroballistic
- presentation time
- decoding time
- program
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention discloses a data synchronization method which comprises the following steps: a front end server carries out configuration on synchronization compensation information and sends the information to a digital television reception terminal through a transport stream; according to the synchronization compensation information the digital television reception terminal carries out compensation on a decoding time stamp and a presentation time stamp of an audio and video, a caption and a data assembly which are included by a present program prepared to play, in order to obtain a decoding time stamp after compensation and a presentation time stamp after compensation, decoding the audio and video, caption and data assembly according to time identified by the decoding time stamp after compensation, and displaying the audio and video, caption and data assembly according to the presentation time stamp after compensation. The invention also discloses the digital television reception terminal and the front end server. According to a technical scheme disclosed in the invention, synchronization of the audio and video, caption and data can be realized without a manual operation by a user, and user experience is substantially improved.
Description
Technical field
The present invention relates to the digital television techniques field, particularly a kind of receiving terminal for digital television, front-end server and method of data synchronization.
Background technology
Digital Television (DTV:Digital Television) be meant adopt digital technology with signals such as live image and sound encode, processing such as compression, after storage or broadcasting in real time, supply the television system of user's reception, broadcast.Each link of system comprises from studio program and making, and to transmission, storage/transmission, all adopts digital technology until processes such as reception, demonstrations.Compare with the conventional analogue TV, Digital Television all has significant improvement at image and sound quality two sides.
Along with the fast development of Digital Television industry, the digital television program source of various places broadcasting and TV broadcasting is abundant, and for the criterion of digital television program quality, wherein, very more noticeable is audio frequency and video, captions and synchronization of data problem.Many engineers and technicians have proposed various solutions for addressing this problem.
In the prior art; Audio frequency and video, captions and synchronization of data are through Decoding Time Stamp (DTS; Decoding Time Stamp), Presentation Time Stamp (PTS; Presentation Time Stamp) and program clock reference (PCR, program clock reference) come collaborative accomplish.
Wherein, program clock reference provides the reference time, and the decode time of audio frequency and video, captions and elementary stream (ES, elementary stream) identifies through Decoding Time Stamp, and the demonstration time identifies through Presentation Time Stamp.
When audio frequency and video, captions and data occurring when asynchronous, can increase software and hardware facilities adjustment at digital TV front-end, also can adjust through manual fine-tuning Decoding Time Stamp and Presentation Time Stamp value at receiving terminal for digital television.
Yet above-mentioned prior art scheme has following deficiency at least:
(1) user's manual adjustment, the accuracy of audio frequency and video, captions and data sync are difficult to guarantee;
(2) need user's manual adjustments, brought inconvenience, can influence user experience greatly to user's operation;
(3) need front end to increase software and hardware facilities, cost increases.
Summary of the invention
The technical problem that the present invention mainly solves provides a kind of method of data synchronization, can regulate audio frequency and video, captions and data sync automatically, accurately.
For solving the problems of the technologies described above, the technical scheme that the embodiment of the invention adopts is: a kind of method of data synchronization is provided, may further comprise the steps:
Front-end server configuration synchronization compensated information also is issued to receiving terminal for digital television through transport stream;
Said receiving terminal for digital television compensates according to the Decoding Time Stamp and the Presentation Time Stamp of said synchroballistic information to the audio frequency and video that program comprised, captions and the data package of current preparation broadcast; With Decoding Time Stamp after the acquisition compensation and the Presentation Time Stamp after the compensation; According to the said audio frequency and video of the time decoder that Decoding Time Stamp identified, captions and the data package after the said compensation, show described decoded audio frequency and video, captions and data package according to the Presentation Time Stamp after the said compensation.
According to one preferred embodiment of the present invention; Said synchroballistic information is the synchroballistic descriptor; When audio frequency and video, captions and data in the said digital television business exist when asynchronous, the Decoding Time Stamp and the Presentation Time Stamp of the Frame of the assembly that said business comprised are revised through said synchroballistic descriptor.
According to one preferred embodiment of the present invention, said synchroballistic descriptor is added on transport stream:
During the ground floor recirculating network of network information table is described;
In the second layer circle transmission stream description of network information table;
During the ground floor circulation program of Program Map Table is described;
In the second layer circle transmission stream description of BAT bouquet association table; Or
In the ground floor circulation business description of SDT Service Description Table.
According to one preferred embodiment of the present invention, said synchroballistic descriptor comprises one or more in transport stream identification symbol, original network identification symbol, task identifier, component count, labelled component, Decoding Time Stamp sign, Decoding Time Stamp offset, Presentation Time Stamp sign, the Presentation Time Stamp offset.
According to one preferred embodiment of the present invention; With the assembly as a reference of assembly in audio frequency and video, captions and the data that said digital television business was comprised; If other assemblies are compared the demonstration time and lagged behind with said reference component, then the offset that the Decoding Time Stamp and the Presentation Time Stamp of said assembly deducted Decoding Time Stamp and Presentation Time Stamp respectively obtains final Decoding Time Stamp and Presentation Time Stamp carries out negative justification.
According to one preferred embodiment of the present invention; With the assembly as a reference of assembly in audio frequency and video, captions and the data that said digital television business was comprised; If other assemblies are compared the demonstration time in advance with said reference component, then Decoding Time Stamp and the Presentation Time Stamp with said assembly adds that respectively the offset of Decoding Time Stamp and Presentation Time Stamp obtains final Decoding Time Stamp and Presentation Time Stamp carries out positive justification.
According to one preferred embodiment of the present invention, carry out described negative justification when Decoding Time Stamp sign and Presentation Time Stamp are masked as ' 0 ' in the said synchroballistic descriptor.
According to one preferred embodiment of the present invention, carry out described positive justification when Decoding Time Stamp sign and Presentation Time Stamp are masked as ' 1 ' in the said synchroballistic descriptor.
According to one preferred embodiment of the present invention, said receiving terminal for digital television obtains said synchroballistic information in the program searching process, may further comprise the steps:
The frequency locking demodulation obtains baseband transmission stream;
Resolve Program Association Table, Program Map Table and SDT Service Description Table, obtain program-related information, resolve the synchroballistic descriptor, obtain the synchroballistic information relevant with program;
Preserve program-related information and synchroballistic information.
According to one preferred embodiment of the present invention, the synchroballistic information that said receiving terminal for digital television obtains during according to program searching when carrying out playing programs compensates the Decoding Time Stamp and the Presentation Time Stamp of assembly, may further comprise the steps:
PID filters, Data Receiving, buffer memory;
According to Decoding Time Stamp offset in the synchroballistic descriptor Decoding Time Stamp is compensated, get revised Decoding Time Stamp;
The basic value of revised Decoding Time Stamp and program clock reference is compared;
If unequal, then wait for a period of time;
If equate, then start the decoding of present frame;
According to Presentation Time Stamp offset in the synchroballistic descriptor Presentation Time Stamp is compensated, obtain revised Presentation Time Stamp;
The basic value of revised Presentation Time Stamp and program clock reference is compared;
If unequal, then wait for a period of time;
If equate, then show the output present frame, and the releasing memory space.
For solving the problems of the technologies described above, another technical scheme that the embodiment of the invention adopts is: a kind of front-end server is provided, it is characterized in that, comprising:
Configuration module, the configuration synchronization compensated information;
Add module, said synchroballistic information is added in the transport stream;
Sending module issues the transport stream after said interpolation resume module to said receiving terminal for digital television.
For solving the problems of the technologies described above, another technical scheme that the embodiment of the invention adopts is: a kind of receiving terminal for digital television is provided, it is characterized in that, comprising:
Acquisition module is used for obtaining synchroballistic information from front-end server;
Adjustment module, the Decoding Time Stamp and the Presentation Time Stamp of the audio frequency and video that program comprised, captions and the data package that current preparation is play compensate;
Output module shows described decoded audio frequency and video, captions and data package according to the Presentation Time Stamp after the said compensation.
According to one preferred embodiment of the present invention, said acquisition module comprises:
Receiving element is used for the transport stream that the receiving front-end server issues;
Demodulating unit is used for the transport stream that said receiving element receives is carried out demodulation, obtains baseband transmission stream stream;
Resolution unit, the baseband transmission stream that is used for said demodulating unit is obtained is resolved, and obtains the essential information and the synchroballistic information of program.
The beneficial effect of the embodiment of the invention is: be different from the situation of prior art, method of data synchronization disclosed by the invention and system do not need user's manual operation just can realize audio frequency and video, captions and synchronization of data, have improved user experience greatly, and be practical and convenient.
Description of drawings
Fig. 1 is the schematic flow sheet that receiving terminal for digital television obtains synchroballistic information;
Fig. 2 is the data sync of receiving terminal for digital television when the carrying out playing programs schematic flow sheet of compensation automatically;
Fig. 3 is the module diagram of front-end server;
Fig. 4 is the module diagram of receiving terminal for digital television;
Fig. 5 is the sketch map of the acquisition module in the receiving terminal for digital television.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is elaborated.
The embodiment of the invention provides a kind of method of data synchronization, may further comprise the steps:
Front-end server configuration synchronization compensated information also is issued to receiving terminal for digital television through transport stream (TS);
Said receiving terminal for digital television compensates according to the Decoding Time Stamp and the Presentation Time Stamp of said synchroballistic information to the assembly that program comprised of current preparation broadcast; With Decoding Time Stamp after the acquisition compensation and the Presentation Time Stamp after the compensation; According to the said assembly of the time decoder that Decoding Time Stamp identified after the said compensation, show described decoded assembly and output to display devices such as television set according to the Presentation Time Stamp after the said compensation.
The solution that the present invention proposes comprises front end (front-end server) processing and terminal (receiving terminal for digital television).
Wherein, described front-end processing is meant that the actual conditions according to digital television business provide said professional Decoding Time Stamp and the Presentation Time Stamp adjustment magnitude that comprises assembly (flowing ES basically);
Wherein, audio frequency and video, captions and synchronization of data compensation are carried out according to described adjustment magnitude in described terminal, thereby make audio frequency and video, captions and the data of digital television business realize synchronously.
Wherein, described adjustment is the adjustment of carrying out according to the actual synchronization situation of business;
Wherein, described adjustment is the adjustment of just carrying out when asynchronous when existing between audio frequency and video, captions and data;
Wherein, described adjustment is specially with one of them assembly of video, audio frequency, captions and data and is (flowing ES basically) reference, and the time that remaining component shows with respect to this assembly exists in advance or under the situation about lagging behind to be adjusted;
Wherein,, said assembly need carry out positive justification when showing time lead to its demonstration time and decode time;
Wherein, said positive justification is meant that Decoding Time Stamp and Presentation Time Stamp with said assembly add that respectively the offset of Decoding Time Stamp and Presentation Time Stamp obtains final Decoding Time Stamp and Presentation Time Stamp;
Wherein,, said assembly need carry out negative justification when showing time lag to its demonstration time and decode time;
Wherein, said negative justification is meant that the offset that Decoding Time Stamp and Presentation Time Stamp with said assembly deduct Decoding Time Stamp and Presentation Time Stamp respectively obtains final Decoding Time Stamp and Presentation Time Stamp.
Wherein, described adjustment is accomplished at digital TV terminal;
Wherein, described adjustment magnitude is the standard value that is provided according to measurement by front end;
Wherein, described adjustment magnitude information is to carry through the self-defining privately owned descriptor of the present invention, and is handed down to receiving terminal for digital television through transport stream.
In order to make solution of the present invention be achieved, the present invention is special self-defined a kind of privately owned descriptor; Wherein,
Said privately owned descriptor is synchroballistic descriptor (Sync_Compensating_descriptor ());
Said synchroballistic descriptor is used to provide audio frequency and video, captions and the data sync compensated information of digital television business;
Said synchroballistic information is meant that the Decoding Time Stamp and the Presentation Time Stamp of the Frame of the assembly (flowing ES basically) that said business is comprised carry out certain correction, thereby guarantees audio frequency and video, captions and synchronization of data.
Wherein, said synchroballistic descriptor comprises following critical field:
Transport stream identification symbol, original network identification symbol, task identifier, component count, labelled component, Decoding Time Stamp sign, Decoding Time Stamp offset, Presentation Time Stamp sign, Presentation Time Stamp offset.
In order to make solution of the present invention more clear, provide the detailed syntactic definition of synchroballistic descriptor (Sync_Compensating_descriptor ()) below.
Wherein, the semantic description of said each field of synchroballistic descriptor is following:
Descriptor_tag: descriptor tag, the 8bit field is used to identify different descriptors.Being defined herein as 0xFE (in SI standard the inside, providing the descriptor tag that 0x80-0xFE defines for the user voluntarily), representing that this descriptor is the synchroballistic descriptor, is the unique identification of synchroballistic descriptor.
Descriptor_length: descriptor length, the 8bit field provides this field byte number of descriptor afterwards.
Transport_stream_id: the transport stream identification symbol, the 16bit field in a transmission system, is used to identify a unique transport stream.
Original_network_id: original network identification symbol, the 16bit field, the network identifier and the transport stream identification that are used to provide the original transmitted system accord with a transport stream of unique identification (TS) together.
Service_id: task identifier, the 16bit field is used in transport stream identification symbol and business of original network identification symbol institute's uniquely identified transport stream unique identification.
Component_number: component count, the 8bit field is used to provide the number of transport stream identification symbol, original network identification symbol, the professional assembly that is comprised of task identifier institute uniquely identified, also is used to identify the period that subsequent components is described.
Component_tag: labelled component; The 8bit field; Be used for assembly of unique identification in transport stream identification symbol, original network identification symbol and task identifier institute uniquely identified business (or cry and flow ES basically), labelled component (component_tag) field value is identical in value and the traffic identifier descriptor.
DTS_offsset_flag: the Decoding Time Stamp sign, the 1bit field is used to provide the symbol of Decoding Time Stamp offset (DTS_offset).When it was designated ' 1 ', expression Decoding Time Stamp offset was for just, and Decoding Time Stamp need add that this offset is as revised Decoding Time Stamp; When it was designated ' 0 ', expression Decoding Time Stamp offset was for negative, and Decoding Time Stamp need deduct this offset as revised Decoding Time Stamp.
DTS_offsset: Decoding Time Stamp offset; The 33bit field; Be used to provide the offset of the Decoding Time Stamp (DTS) of transport stream identification symbol, original network identification symbol, task identifier and labelled component institute uniquely identified assembly, this offset is unit (90KHz just) with 1/300 of system clock frequency (27MHz).
Reserved: keep, keep following expansion and use.
PTS_offset_flag: the Presentation Time Stamp sign, the 1bit field is used to provide the symbol of Presentation Time Stamp offset (PTS_offsset).When it was designated ' 1 ', expression Presentation Time Stamp offset was for just, and Presentation Time Stamp need add that this offset is as revised Presentation Time Stamp; When it was designated ' 0 ', expression Presentation Time Stamp offset was for negative, and Presentation Time Stamp need deduct this offset as revised Presentation Time Stamp.
PTS_offset: Presentation Time Stamp offset; The 33bit field; Be used to provide the offset of the Presentation Time Stamp (DTS) of transport stream identification symbol, original network identification symbol, task identifier and labelled component institute uniquely identified assembly, this offset is unit (90KHz just) with 1/300 of system clock frequency (27MHz).
Synchroballistic descriptor based on above definition can compensate digital television business audio frequency and video, captions and synchronization of data automatically; Said synchronously automatic compensation needs front end and terminal to cooperate processing, describes the handling process and the method at front end and terminal below respectively.
Digital TV front-end is different from general digital TV front-end; The synchronous situation that is embodied in according to each digital television business provides synchroballistic information; And synchroballistic information is encapsulated in the transport stream (TS) according to the self-defining data structure of the present invention transmits; Corresponding processing is carried out at the terminal again, thereby reaches the purpose of synchroballistic.Be described in detail below the concrete processing of front end.
The digital TV front-end system need be according to audio frequency and video, captions and synchronization of data situation in the digital television business to adjusting between the assembly that said digital television business comprised synchronously;
When audio frequency and video, captions and data in the said digital television business exist when asynchronous; Need adjust the Decoding Time Stamp (DTS) and the Presentation Time Stamp (PTS) of assembly (the flowing ES basically) Frame that said digital television business comprised, thereby reach the purpose of audio frequency and video, captions and data sync;
Wherein, described Decoding Time Stamp (DTS) and Presentation Time Stamp (PTS) to assembly (the flowing ES basically) Frame that digital television business comprised adjusted through in transport stream (TS), adding the realization of synchroballistic descriptor;
Wherein, said synchroballistic descriptor can be added in the ground floor recirculating network description of network information table (NIT);
Wherein, said synchroballistic descriptor can be added in the second layer circle transmission stream description of network information table (NIT);
Wherein, said synchroballistic descriptor can be added in the ground floor circulation program description of Program Map Table (PMT);
Wherein, said synchroballistic descriptor can be added in the second layer circle transmission stream description of BAT bouquet association table (BAT);
Wherein, said synchroballistic descriptor can also be added in the ground floor circulation business description of SDT Service Description Table (SDT).
Wherein, described synchroballistic descriptor has the self-defining data structure of the present invention;
Wherein, described adjustment is controlled through the following critical field of said synchroballistic descriptor: transport stream identification symbol, original network identification symbol, task identifier, component count, labelled component, Decoding Time Stamp sign, Decoding Time Stamp offset, Presentation Time Stamp sign, Presentation Time Stamp offset.
Wherein, said transport stream identification symbol is used for a unique transport stream of transmission system sign;
Wherein, the said original network identification symbol network identifier and the transport stream identification that are used to provide the original transmitted system accords with a transport stream of unique identification (TS) together;
Wherein, said task identifier is used in transport stream identification symbol and business of original network identification symbol institute's uniquely identified transport stream unique identification;
Wherein, said component count is used to provide the number of transport stream identification symbol, original network identification symbol, the professional assembly that is comprised of task identifier institute uniquely identified, also is used to identify the period that subsequent components is described;
Wherein, Said labelled component is used for assembly of unique identification in transport stream identification symbol, original network identification symbol and task identifier institute uniquely identified business (or being basic stream ES), during stream description circulates basically in value and the Program Map Table (PMT) in the traffic identifier descriptor labelled component field value identical;
Wherein, said Decoding Time Stamp sign is used to provide the symbol of Decoding Time Stamp offset.When it was designated ' 1 ', expression Decoding Time Stamp offset was for just, and Decoding Time Stamp need add that this offset is as revised Decoding Time Stamp; When it was designated ' 0 ', expression Decoding Time Stamp offset was for negative, and Decoding Time Stamp need deduct this offset as revised Decoding Time Stamp;
Wherein, Said Decoding Time Stamp offset is used to provide the offset of the Decoding Time Stamp (DTS) of transport stream identification symbol, original network identification symbol, task identifier and labelled component institute uniquely identified assembly, and this offset is unit (90KHz just) with 1/300 of system clock frequency (27MHz);
Wherein, The positive and negative of said Decoding Time Stamp offset depends on that said Decoding Time Stamp attribute field identifies; When said Decoding Time Stamp attribute field value was ' 1 ', the Decoding Time Stamp of the Frame of said assembly need add the above Decoding Time Stamp offset and obtain revised Decoding Time Stamp; When said Decoding Time Stamp attribute field value was ' 0 ', the Decoding Time Stamp of the Frame of said assembly need deduct said Decoding Time Stamp offset and obtain revised Decoding Time Stamp;
Wherein, said Presentation Time Stamp sign is used to provide the symbol of Presentation Time Stamp offset.When it was designated ' 1 ', expression Presentation Time Stamp offset was for just, and Presentation Time Stamp need add that this offset is as revised Presentation Time Stamp; When it was designated ' 0 ', expression Presentation Time Stamp offset was for negative, and Presentation Time Stamp need deduct this offset as revised Presentation Time Stamp;
Wherein, Said Presentation Time Stamp offset is used to provide the offset of the Presentation Time Stamp (DTS) of transport stream identification symbol, original network identification symbol, task identifier and labelled component institute uniquely identified assembly, and this offset is unit (90KHz just) with 1/300 of system clock frequency (27MHz);
Wherein, The positive and negative of said Presentation Time Stamp offset depends on that said Presentation Time Stamp attribute field identifies; When said Presentation Time Stamp attribute field value was ' 1 ', the Presentation Time Stamp of the Frame of said assembly need add the above Presentation Time Stamp offset and obtain revised Presentation Time Stamp; When said Presentation Time Stamp attribute field value was ' 0 ', the Presentation Time Stamp of the Frame of said assembly need deduct said Presentation Time Stamp offset and obtain revised Presentation Time Stamp.
Can be in concrete the realization with one of them assembly that said digital television business was comprised assembly as a reference; If other assemblies are compared the demonstration time and lagged behind with said reference component, Decoding Time Stamp and the Presentation Time Stamp to said assembly carries out negative justification so; If other assemblies are compared the demonstration time in advance with said reference component, Decoding Time Stamp and the Presentation Time Stamp to said assembly carries out positive justification so;
Wherein, described positive justification is meant that Decoding Time Stamp sign and Presentation Time Stamp are masked as ' 1 ' in the said synchroballistic descriptor;
Wherein, described negative justification is meant that Decoding Time Stamp sign and Presentation Time Stamp are masked as ' 0 ' in the said synchroballistic descriptor;
Wherein, described reference component can be that video, audio frequency, captions or other data in the business flow (ES) basically.
Front end adds the synchroballistic descriptor and is used for to audio frequency and video, captions and the synchronization of data information that affords redress in transport stream (TS), receiving terminal for digital television is according to said compensated information compensating assembly in the digital television business synchronously;
Wherein, described synchroballistic information is that receiving terminal for digital television obtains in program searching;
Wherein, described synchroballistic information is brought into play the synchroballistic effect when playing programs.
Below respectively with regard to synchroballistic information obtain and the method for synchroballistic is described respectively.
See also Fig. 1, said receiving terminal for digital television obtains synchroballistic information and in the program searching process, accomplishes, and may further comprise the steps:
Step S101: the frequency locking demodulation obtains baseband transmission stream (TS).
Lock current frequency and demodulation, obtain baseband transmission stream (TS).
Wherein, described frequency can be the manually frequency point information of input of user, also can be the frequency point information of from network information table (NIT), obtaining;
Wherein, described transport stream (TS) is by original network identification symbol (original_network_id) and transport stream identification symbol (transport_stream_id) unique identification.
Step S102: resolve PAT, PMT, SDT, obtain program-related information; Resolve the synchroballistic descriptor, obtain the synchroballistic information relevant with program.
Step S101 has obtained baseband transmission stream (TS), and table and descriptor relevant in the said baseband transmission stream (TS) are resolved, and can obtain program-related information;
Wherein, described table comprises Program Association Table (PAT), Program Map Table (PMT), SDT Service Description Table (SDT);
Wherein, described PAT provides the PID of the program number that comprised in the said transport stream (TS) and each program PMT;
PID according to said PMT can obtain the PMT packet, resolves PMT and obtains PCR_PID and audio frequency and video PID;
Resolve said SDT and can obtain programm name information;
Wherein, described program identifies through program number (program_number) in PAT and PMT, in SDT, identifies through task identifier (service_id);
Wherein, described program number and task identifier are corresponding.
(this descriptor is synchroballistic descriptor ((Sync_Compensating_descriptor ())) for the privately owned descriptor of 0xFE to resolve descriptor tag (descriptor_tag); Its syntactic structure front has provided clearly definition), obtain the synchroballistic information relevant with program;
Wherein, described synchroballistic information is associated through the assembly of labelled component (component_tag) field and said business;
Wherein, the labelled component field during basic stream description circulates in the Program Map Table (PMT) of said labelled component and said business in the traffic identifier descriptor is corresponding;
Wherein, Described synchroballistic information is given by corresponding field in the synchroballistic descriptor, comprising: Decoding Time Stamp sign (DTS_offsset_flag), Decoding Time Stamp offset (DTS_offsset), Presentation Time Stamp sign (PTS_offset_flag), Presentation Time Stamp offset (PTS_offset).
Wherein, Described synchroballistic descriptor is according to the actual description in the transport stream in the network (TS), can obtain from one of position of the following stated at least: the ground floor recirculating network of network information table (NIT) is described, the second layer circle transmission stream (TS) of network information table (NIT) describe in, the ground floor circulation program of Program Map Table (PMT) describe in, the second layer circle transmission stream (TS) of BAT bouquet association table (BAT) describe in, in SDT Service Description Table (SDT) the ground floor circulation business description.
Step S103: preserve program-related information and synchroballistic information.Step S102 has obtained program-related information, comprising: program number, programm name, each program PCR_PID and the PID of basic stream, the synchroballistic information of each program.After set-top box is obtained these information, it is stored in the program data district in the Flash memory, uses when supplying playing programs.
See also Fig. 2, the synchroballistic information that said receiving terminal for digital television obtains during according to program searching when carrying out playing programs compensates the Decoding Time Stamp and the Presentation Time Stamp of assembly (flowing ES basically), may further comprise the steps:
Step S201:PID filters, Data Receiving, buffer memory.
Wherein, said PID is meant the current Packet Identifier (PID) of choosing assembly (flowing ES basically) that business comprises of user;
Wherein, said business is by transport stream identification symbol, original network identification symbol, task identifier institute unique identification;
Wherein, the Packet Identifier of assembly (flowing ES basically) that said business comprises is provided by the Program Map Table (PMT) of said business, and when program searching, acquires;
Wherein, said Packet Identifier (PID) comprises the Packet Identifier (PCR_PID) of the program clock reference of said business and the Packet Identifier (PID) of basic stream;
Wherein, described Data Receiving is meant transport stream (TS) bag of the assembly (flowing ES basically) that comprises according to the said business of said Packet Identifier (PID) filtration;
Wherein, said buffer memory is meant that the transport stream packets that will receive is cached in the memory;
Wherein, said buffer memory is that unit stores with the frame;
Wherein, described frame is meant frame of video, audio frame and other Frames.
Step S202: according to Decoding Time Stamp offset in the synchroballistic descriptor Decoding Time Stamp is compensated, obtain revised Decoding Time Stamp.
Can acquire Frame according to step S201;
Wherein, said Frame corresponding a Decoding Time Stamp (DTS);
Wherein, said Decoding Time Stamp (DTS) be from transport stream (TS), obtain in real time or through calculating;
Wherein, described calculating is the basis Decoding Time Stamp of the Decoding Time Stamp calculating present frame of decoded frame before, and the appearance of this situation generally is the Decoding Time Stamp that does not provide present frame in the transport stream;
Wherein, described calculating is meant according to the otherness of present frame and the order of decoded frame decoding before and calculates, specifically provides through following formula:
The frame decoding time tag of present frame Decoding Time Stamp=before+(present frame decoding order-frame decoding order) before * frame per second;
Wherein, said frame per second is 1/25 when frame frequency is 25Hz;
Said frame per second still was its inverse when wherein, said frame frequency was other numerical value;
Wherein, said Decoding Time Stamp (DTS) is encoded with 33bit, and is unit (90KHz just) with 1/300 of system clock frequency (27MHz);
Wherein, described Decoding Time Stamp being compensated according to Decoding Time Stamp offset in the synchroballistic descriptor is meant and uses the Decoding Time Stamp offset that Decoding Time Stamp (DTS) is revised;
Wherein, described correction is meant and on the basis of Decoding Time Stamp (DTS), adds or deduct the Decoding Time Stamp offset;
It is wherein, described that to add or deduct be by decode time attribute field sign in the said synchroballistic descriptor;
The sign Decoding Time Stamp added that the Decoding Time Stamp offset obtains revised Decoding Time Stamp when wherein, said decode time was masked as ' 1 ';
The sign Decoding Time Stamp deducted the Decoding Time Stamp offset and obtains revised Decoding Time Stamp when wherein, said decode time was masked as ' 0 '.
Step S203: the basic value of revised Decoding Time Stamp and program clock reference is compared.
The revised Decoding Time Stamp (DTS) that step S202 is acquired and the basic value (program_clock_reference_base) of program clock reference compare;
Wherein, described program clock reference (PCR) obtains from transport stream (TS) in real time;
Wherein, described program clock reference (PCR) is the numerical value of 42bit, and this numerical value is divided into two parts and encodes;
Wherein, described two parts are meant the expanding value (program_clock_reference_extension) of the basic value (program_clock_reference_base) and the program clock reference of program clock reference;
Wherein, the basic value of said program clock reference (program_clock_reference_base) is 33bit, is that unit (90KHz just) encodes with 1/300 of system clock frequency (27MHz);
Wherein, the expanding value of said program clock reference (program_clock_reference_extension) is 9bit, is that unit encodes with system clock frequency (27MHz);
Wherein, the basic value of described revised Decoding Time Stamp and program clock reference is compared and is meant that revised Decoding Time Stamp (DTS) and program clock reference basic value (program_clock_reference_base) that step S202 is acquired compare;
Wherein, there are two kinds of results in said contrast: equate and do not wait, when said comparing result turns to step S205 when equating, when said comparing result turns to step S204 when not waiting.
Step S204: wait for the time, make the basic value of revised Decoding Time Stamp and program clock reference synchronous.
When turning to this step when not waiting, the contrast of revised Decoding Time Stamp among the step S203 and program clock reference basic value continues wait;
Wherein, the described stand-by period is to be unit (90KHz just) with 1/300 of system clock frequency (27MHz).
Step S205: start the decoding of present frame.When revised Decoding Time Stamp among the step S203 is equal with the contrast of program clock reference basic value, turn to this step, start decoder present frame is decoded.
Step S206: according to Presentation Time Stamp offset in the synchroballistic descriptor Presentation Time Stamp is compensated, obtain revised Presentation Time Stamp.
Can acquire decoded Frame according to step S205;
Wherein, said Frame corresponding a Presentation Time Stamp (PTS);
Wherein, said Presentation Time Stamp (PTS) be from transport stream (TS), obtain in real time or through calculating;
Wherein, described calculating is the basis Presentation Time Stamp of the Presentation Time Stamp calculating present frame of display frame before, and the appearance of this situation generally is the Presentation Time Stamp that does not provide present frame in the transport stream;
Wherein, described calculating be meant according to present frame and before the otherness of display frame display order calculate, specifically provide through following formula:
The frame Presentation Time Stamp of present frame Presentation Time Stamp=before+(present frame display order-frame display order) before * frame per second;
Wherein, said frame per second is 1/25 when frame frequency is 25Hz;
Said frame per second still was its inverse when wherein, said frame frequency was other numerical value;
Wherein, said Presentation Time Stamp (PTS) is encoded with 33bit, and is unit (90KHz just) with 1/300 of system clock frequency (27MHz);
Wherein, described Presentation Time Stamp being compensated according to Presentation Time Stamp offset in the synchroballistic descriptor is meant and uses the Presentation Time Stamp offset that Presentation Time Stamp (PTS) is revised;
Wherein, described correction is meant and on the basis of Presentation Time Stamp (PTS), adds or deduct the Presentation Time Stamp offset;
It is wherein, described that to add or deduct be by showing the time tag field identification in the said synchroballistic descriptor;
The sign Presentation Time Stamp added that the Presentation Time Stamp offset obtains revised Presentation Time Stamp when wherein, said demonstration time tag was ' 1 ';
The sign Presentation Time Stamp deducted the Presentation Time Stamp offset and obtains revised Presentation Time Stamp when wherein, said demonstration time tag was ' 0 '.
Step S207: the basic value of revised Presentation Time Stamp and program clock reference is compared.
The revised Presentation Time Stamp (PTS) that step S206 is acquired and the basic value (program_clock_reference_base) of program clock reference compare;
Wherein, described program clock reference (PCR) obtains from transport stream (TS) in real time;
Wherein, described program clock reference (PCR) is the numerical value of 42bit, and this numerical value is divided into two parts and encodes;
Wherein, described two parts are meant the expanding value (program_clock_reference_extension) of the basic value (program_clock_reference_base) and the program clock reference of program clock reference;
Wherein, the basic value of said program clock reference (program_clock_reference_base) is 33bit, is that unit (90KHz just) encodes with 1/300 of system clock frequency (27MHz);
Wherein, the expanding value of said program clock reference (program_clock_reference_extension) is 9bit, is that unit encodes with system clock frequency (27MHz);
Wherein, the basic value of described revised Presentation Time Stamp and program clock reference is compared and is meant that revised Presentation Time Stamp (PTS) and program clock reference basic value (program_clock_reference_base) that step S206 is acquired compare;
Wherein, there are two kinds of results in said contrast: equate and do not wait, when said comparing result turns to step S209 when equating, when said comparing result turns to step S208 when not waiting.
Step S208: wait for the time, make the basic value of revised Presentation Time Stamp and program clock reference synchronous.
When turning to this step when not waiting, the contrast of revised Presentation Time Stamp among the step S207 and program clock reference basic value continues wait;
Wherein, the described stand-by period is to be unit (90KHz just) with 1/300 of system clock frequency (27MHz).
Step S209: show the output present frame, and the releasing memory space.When revised Presentation Time Stamp among the step S207 is equal with the contrast of program clock reference basic value, turn to this step, the present frame behind the output decoder, and releasing memory space.
Can realize the automatic compensation of audio frequency and video, captions and data sync based on above-described method.This implementation is simple and convenient, does not need user's manual operation just can realize audio frequency and video, captions and synchronization of data, thereby has improved user experience greatly, and the present invention has also practiced thrift the hardware cost of front end, thereby has improved product competitiveness greatly.
Please consult Fig. 3 in the lump, the embodiment of the invention also provides a kind of front-end server 10, and this front-end server 10 comprises configuration module 11, adds module 12 and sending module 13.
Wherein, this configuration module 11 is used for the configuration synchronization compensated information; This adds module 12 said synchroballistic information is added in the transport stream; This sending module 13 issues the transport stream after said interpolation module 12 processing to said receiving terminal for digital television.
Please consult Fig. 4 in the lump, the embodiment of the invention also provides a kind of receiving terminal for digital television 20, and this receiving terminal for digital television 20 comprises acquisition module 21, adjustment module 22 and output module 23.
Wherein, this acquisition module 21 is used for obtaining synchroballistic information from front-end server 10; The Decoding Time Stamp and the Presentation Time Stamp of the audio frequency and video that program comprised, captions and data package that 22 pairs of current preparations of this adjustment module are play compensate; This output module 23 shows described decoded audio frequency and video, captions and data package according to the Presentation Time Stamp after the said compensation.
Please consult Fig. 5 in the lump, in embodiments of the present invention, these acquisition module 21 acquisition modules further comprise receiving element 211, demodulating unit 212 and resolution unit 213.
Wherein, this receiving element 211 is used for the transport stream that the receiving front-end server issues; This demodulating unit 212 is used for the transport stream that this receiving element 211 receives is carried out demodulation, obtains baseband transmission stream stream; The baseband transmission stream that this resolution unit 213 is used for this demodulating unit 212 is obtained is resolved, and obtains the essential information and the synchroballistic information of program.
What deserves to be mentioned is; The scheme that the present invention proposes is carried out audio frequency and video, captions and synchronization of data compensation according to descriptor in the synchroballistic descriptor in the transport stream (TS); Certainly, the mode that can be as required in concrete the realization combines with manual adjustment is carried out audio frequency and video, captions and synchronization of data adjustment.In addition; The method of the synchroballistic that the embodiment of the invention provides is with the value of program clock reference (PCR) as a reference; With the video in the digital television business; Audio frequency; A decode time and the demonstration time of adjusting other assemblies for benchmark in captions or the data package; But be not limited to this; Can also be with the video in the digital television business; Audio frequency; Decoding Time Stamp in captions or the data package or Presentation Time Stamp are as system-timing reference value and fiducial value; Remaining component is adjusted with respect to the Decoding Time Stamp and the Presentation Time Stamp of this assembly; The defective of this solution is that the time precision of the encoded radio of 33bit does not have the precision height of 42bit program clock reference (PCR) encoded radio originally, but also can be used as a kind of alternative solution.
The above only is an exemplary embodiment of the present invention; Be not so limit scope of patent protection of the present invention; Every equivalent structure or equivalent flow process conversion that utilizes specification of the present invention and accompanying drawing content to be done; Or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (20)
1. a method of data synchronization is characterized in that, may further comprise the steps:
Front-end server configuration synchronization compensated information also is issued to receiving terminal for digital television through transport stream;
Said receiving terminal for digital television compensates according to the Decoding Time Stamp and the Presentation Time Stamp of said synchroballistic information to the audio frequency and video that program comprised, captions and the data package of current preparation broadcast; With Decoding Time Stamp after the acquisition compensation and the Presentation Time Stamp after the compensation; According to the said audio frequency and video of the time decoder that Decoding Time Stamp identified, captions and the data package after the said compensation, show described decoded audio frequency and video, captions and data package according to the Presentation Time Stamp after the said compensation.
2. method of data synchronization according to claim 1; It is characterized in that; Said synchroballistic information is the synchroballistic descriptor; When audio frequency and video, captions and data in the said digital television business exist when asynchronous, the Decoding Time Stamp and the Presentation Time Stamp of the Frame of the assembly that said business comprised are revised through said synchroballistic descriptor.
3. method of data synchronization according to claim 2 is characterized in that, said synchroballistic descriptor is added on transport stream:
During the ground floor recirculating network of network information table is described;
In the second layer circle transmission stream description of network information table;
During the ground floor circulation program of Program Map Table is described;
In the second layer circle transmission stream description of BAT bouquet association table; Or
In the ground floor circulation business description of SDT Service Description Table.
4. method of data synchronization according to claim 3; It is characterized in that said synchroballistic descriptor comprises one or more in transport stream identification symbol, original network identification symbol, task identifier, component count, labelled component, Decoding Time Stamp sign, Decoding Time Stamp offset, Presentation Time Stamp sign, the Presentation Time Stamp offset.
5. method of data synchronization according to claim 4; It is characterized in that; With the assembly as a reference of assembly in audio frequency and video, captions and the data that said digital television business was comprised; If other assemblies are compared the demonstration time and lagged behind with said reference component, then the offset that the Decoding Time Stamp and the Presentation Time Stamp of said assembly deducted Decoding Time Stamp and Presentation Time Stamp respectively obtains final Decoding Time Stamp and Presentation Time Stamp carries out negative justification.
6. method of data synchronization according to claim 5; It is characterized in that; With the assembly as a reference of assembly in audio frequency and video, captions and the data that said digital television business was comprised; If other assemblies are compared the demonstration time in advance with said reference component, then Decoding Time Stamp and the Presentation Time Stamp with said assembly adds that respectively the offset of Decoding Time Stamp and Presentation Time Stamp obtains final Decoding Time Stamp and Presentation Time Stamp carries out positive justification.
7. method of data synchronization according to claim 6 is characterized in that, carries out described negative justification when Decoding Time Stamp sign and Presentation Time Stamp are masked as ' 0 ' in the said synchroballistic descriptor.
8. method of data synchronization according to claim 7 is characterized in that, carries out described positive justification when Decoding Time Stamp sign and Presentation Time Stamp are masked as ' 1 ' in the said synchroballistic descriptor.
9. method of data synchronization according to claim 8 is characterized in that, said receiving terminal for digital television obtains said synchroballistic information in the program searching process, may further comprise the steps:
The frequency locking demodulation obtains baseband transmission stream;
Resolve Program Association Table, Program Map Table and SDT Service Description Table, obtain program-related information, resolve the synchroballistic descriptor, obtain the synchroballistic information relevant with program;
Preserve program-related information and synchroballistic information.
10. method of data synchronization according to claim 9; It is characterized in that; The synchroballistic information that said receiving terminal for digital television obtains during according to program searching when carrying out playing programs compensates the Decoding Time Stamp and the Presentation Time Stamp of assembly, may further comprise the steps:
PID filters, Data Receiving, buffer memory;
According to Decoding Time Stamp offset in the synchroballistic descriptor Decoding Time Stamp is compensated, get revised Decoding Time Stamp;
The basic value of revised Decoding Time Stamp and program clock reference is compared;
If unequal, then wait for a period of time;
If equate, then start the decoding of present frame;
According to Presentation Time Stamp offset in the synchroballistic descriptor Presentation Time Stamp is compensated, obtain revised Presentation Time Stamp;
The basic value of revised Presentation Time Stamp and program clock reference is compared;
If unequal, then wait for a period of time;
If equate, then show the output present frame, and the releasing memory space.
11. a front-end server is characterized in that, comprising:
Configuration module, the configuration synchronization compensated information;
Add module, said synchroballistic information is added in the transport stream;
Sending module issues the transport stream after said interpolation resume module to said receiving terminal for digital television.
12. front-end server according to claim 11; It is characterized in that; Said synchroballistic information is the synchroballistic descriptor; When audio frequency and video, captions and data in the said digital television business exist when asynchronous, the Decoding Time Stamp and the Presentation Time Stamp of the Frame of the assembly that said business comprised are revised through said synchroballistic descriptor.
13. front-end server according to claim 12 is characterized in that, said synchroballistic descriptor is added on transport stream:
During the ground floor recirculating network of network information table is described;
In the second layer circle transmission stream description of network information table;
During the ground floor circulation program of Program Map Table is described;
In the second layer circle transmission stream description of BAT bouquet association table; Or
In the ground floor circulation business description of SDT Service Description Table.
14. front-end server according to claim 13; It is characterized in that said synchroballistic descriptor comprises one or more in transport stream identification symbol, original network identification symbol, task identifier, component count, labelled component, Decoding Time Stamp sign, Decoding Time Stamp offset, Presentation Time Stamp sign, the Presentation Time Stamp offset.
15. front-end server according to claim 14; It is characterized in that; With the assembly as a reference of assembly in audio frequency and video, captions and the data that said digital television business was comprised; If other assemblies are compared the demonstration time and lagged behind with said reference component, then the offset that the Decoding Time Stamp and the Presentation Time Stamp of said assembly deducted Decoding Time Stamp and Presentation Time Stamp respectively obtains final Decoding Time Stamp and Presentation Time Stamp carries out negative justification.
16. front-end server according to claim 15; It is characterized in that; With the assembly as a reference of assembly in audio frequency and video, captions and the data that said digital television business was comprised; If other assemblies are compared the demonstration time in advance with said reference component, then Decoding Time Stamp and the Presentation Time Stamp with said assembly adds that respectively the offset of Decoding Time Stamp and Presentation Time Stamp obtains final Decoding Time Stamp and Presentation Time Stamp carries out positive justification.
17. front-end server according to claim 16 is characterized in that, carries out described negative justification when Decoding Time Stamp sign and Presentation Time Stamp are masked as ' 0 ' in the said synchroballistic descriptor.
18. front-end server according to claim 17 is characterized in that, carries out described positive justification when Decoding Time Stamp sign and Presentation Time Stamp are masked as ' 1 ' in the said synchroballistic descriptor.
19. a receiving terminal for digital television is characterized in that, comprising:
Acquisition module is used for obtaining synchroballistic information from front-end server;
Adjustment module, the Decoding Time Stamp and the Presentation Time Stamp of the audio frequency and video that program comprised, captions and the data package that current preparation is play compensate;
Output module shows described decoded audio frequency and video, captions and data package according to the Presentation Time Stamp after the said compensation.
20. receiving terminal for digital television according to claim 19 is characterized in that, said acquisition module comprises:
Receiving element is used for the transport stream that the receiving front-end server issues;
Demodulating unit is used for the transport stream that said receiving element receives is carried out demodulation, obtains baseband transmission stream stream;
Resolution unit, the baseband transmission stream that is used for said demodulating unit is obtained is resolved, and obtains the essential information and the synchroballistic information of program.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110254782A CN102307321A (en) | 2011-08-31 | 2011-08-31 | Digital television reception terminal, front end server and data synchronization method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110254782A CN102307321A (en) | 2011-08-31 | 2011-08-31 | Digital television reception terminal, front end server and data synchronization method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102307321A true CN102307321A (en) | 2012-01-04 |
Family
ID=45381117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110254782A Pending CN102307321A (en) | 2011-08-31 | 2011-08-31 | Digital television reception terminal, front end server and data synchronization method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102307321A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104104974A (en) * | 2014-07-24 | 2014-10-15 | 周元 | Method for achieving synchronous interaction between television set and intelligent mobile terminal |
| CN105338426A (en) * | 2015-10-30 | 2016-02-17 | 北京数码视讯科技股份有限公司 | Correction method for time stamp in transport stream and device thereof |
| CN105323596B (en) * | 2014-06-30 | 2019-04-05 | 惠州市伟乐科技股份有限公司 | It is most according to the system and method re-synchronized in a kind of TS stream program |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1663277A (en) * | 2002-06-27 | 2005-08-31 | 皇家飞利浦电子股份有限公司 | Robust method for achieving audio/video synchronization in MPEG decoders in personal video recording applications |
| CN101355697A (en) * | 2008-09-17 | 2009-01-28 | 深圳市同洲电子股份有限公司 | Method and device for displaying caption |
| CN101577804A (en) * | 2004-04-07 | 2009-11-11 | 松下电器产业株式会社 | Information recording medium wherein stream convertible at high-speed is recorded, and recording apparatus and recording method therefor |
| WO2010069375A1 (en) * | 2008-12-17 | 2010-06-24 | Telefonaktiebolaget L M Ericsson (Publ) | Method and apparatus for measuring audiovisual synchronisation |
-
2011
- 2011-08-31 CN CN201110254782A patent/CN102307321A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1663277A (en) * | 2002-06-27 | 2005-08-31 | 皇家飞利浦电子股份有限公司 | Robust method for achieving audio/video synchronization in MPEG decoders in personal video recording applications |
| CN101577804A (en) * | 2004-04-07 | 2009-11-11 | 松下电器产业株式会社 | Information recording medium wherein stream convertible at high-speed is recorded, and recording apparatus and recording method therefor |
| CN101355697A (en) * | 2008-09-17 | 2009-01-28 | 深圳市同洲电子股份有限公司 | Method and device for displaying caption |
| WO2010069375A1 (en) * | 2008-12-17 | 2010-06-24 | Telefonaktiebolaget L M Ericsson (Publ) | Method and apparatus for measuring audiovisual synchronisation |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105323596B (en) * | 2014-06-30 | 2019-04-05 | 惠州市伟乐科技股份有限公司 | It is most according to the system and method re-synchronized in a kind of TS stream program |
| CN104104974A (en) * | 2014-07-24 | 2014-10-15 | 周元 | Method for achieving synchronous interaction between television set and intelligent mobile terminal |
| CN105338426A (en) * | 2015-10-30 | 2016-02-17 | 北京数码视讯科技股份有限公司 | Correction method for time stamp in transport stream and device thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9712892B2 (en) | Method and an apparatus for processing a broadcast signal including an interactive broadcast service | |
| US7856034B2 (en) | Method and system for generating digital video broadcast (DVB) transport stream from direct satellite system (DSS) transport stream | |
| CA2697765C (en) | Method and apparatus for encoding metadata into a digital program stream | |
| US10924810B2 (en) | Reception device, reception method, transmission device, and transmission method | |
| US9860574B2 (en) | Method and apparatus for transceiving broadcast signal | |
| US20140157342A1 (en) | Reception device, transmission device, reception method, and transmission method | |
| US20190045156A1 (en) | Device for transmitting broadcast signal, device for receiving broadcast signal, method for transmitting broadcast signal, and method for receiving broadcast signal | |
| CN108353196B (en) | Transmission device, transmission method, reception device, and reception method | |
| US10798439B2 (en) | Method and apparatus for receiving, sending and data processing information related to time such as leap second and daylight saving time (DST) | |
| CN102307321A (en) | Digital television reception terminal, front end server and data synchronization method | |
| US11552719B2 (en) | Reception apparatus and data processing method | |
| CN110139144B (en) | Television sharing method based on intelligent home | |
| CN102075805A (en) | Bright color adjusting method, digital television receiving terminal and front-end server | |
| EP3668101B1 (en) | Transmission device, transmission method, reception device, and reception method | |
| EP3280147A1 (en) | Method and apparatus for transmitting and receiving broadcast signal | |
| JP2002101395A (en) | Multiplexing device and method, and decoding device and method | |
| US11223857B2 (en) | Transmission device, transmission method, media processing device, media processing method, and reception device | |
| EP3407614A1 (en) | Method and apparatus for transmitting and receiving broadcast signal | |
| CN105556950B (en) | Broadcast receiver and its control method | |
| CN110719244B (en) | Method and system for transmitting media in heterogeneous network | |
| EP3223527B1 (en) | Program play control method and digital television device | |
| JP3736092B2 (en) | Frame synchronization method and decoding apparatus | |
| KR101685157B1 (en) | System and method associated real-time scheduling information of pp | |
| Standard | Software Download Data Service | |
| US20070252740A1 (en) | Digital television receiver and method for processing a digital television signal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120104 |