CN108924634A - A kind of TS stream method for quickly identifying and device - Google Patents
A kind of TS stream method for quickly identifying and device Download PDFInfo
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- CN108924634A CN108924634A CN201810798075.7A CN201810798075A CN108924634A CN 108924634 A CN108924634 A CN 108924634A CN 201810798075 A CN201810798075 A CN 201810798075A CN 108924634 A CN108924634 A CN 108924634A
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- program
- player
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- stream
- data packet
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/75—Media network packet handling
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/47—End-user applications
- H04N21/482—End-user interface for program selection
- H04N21/4825—End-user interface for program selection using a list of items to be played back in a given order, e.g. playlists
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Human Computer Interaction (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
Abstract
The invention discloses a kind of TS to flow method for quickly identifying and device, and wherein method includes:Start player, searching programs, and the program searched is generated into the rendition list;The program of viewing is wanted in user's selection;The code stream information of selected program is sent to adapter by player;Player obtains corresponding program stream from adapter;Caching filtration treatment successively executed to the data packet of the program stream got, and treated data packet is added according to the sequence of filtering into the caching of player;By it is data cached be sent to decoder module after, continue to obtain lower one piece of data handling and caching, while the decoder module is received data cached and analyzed, and obtains the decoding parametric of program;If analysis failure, current data is abandoned, continuation removes one section from the data of caching and data cached re-starts analysis;If analyzing successfully, decoding and playing program.The present invention pre-processes code stream and is transformed to form new program information data, so that program decoding speed is greatly speeded up.
Description
Technical field
The present invention relates to audio/video flow processing method more particularly to a kind of media player based on wifi dongle are fast
Speed obtains the method and system that program TS stream plays out.
Background technique
Before the decoding of any decoder, the decoding module group unit in Player requires first to read in segment encode flow data progress
Analysis, obtains the decoding parametric of actual program, such as audio-video format, code rate, frame per second, channel number, sample rate just can be carried out
Decoded output.
For being played based on the programme televised live of wifi dongle, the step of prior art, is:
1. searching programs, and display program list;
2. user selects program to play out from the rendition list;
3. Player is interacted with WiFi Dongle, WiFi Dongle will choose the related ES of program to spread and be defeated by
Player;
It is analyzed 4. the decoder mould group of Player reads in original TS data flow, obtains decoding parametric;
5. decoder module is decoded, and renders output.
The prior art has following three:
Include one or more program streams 1. since TS stream is Polymera combined-flow, i.e. in a TS transport stream, in PSI table namely
Comprising the description to all programs, and for decoder module unit, PSI table is also inputted while inputting current AV program stream
Information, the interference that the information that non-present plays program in PSI at this time can cause parsing to identify to decoder module, delays decoding
Identification is identified less than problem.
2. due to programme televised live, program when switching new and old program stream it is excessive, if the remaining code stream of a upper program inputs
To decoding mould group, then parsing can equally be caused to interfere to decoder.Program parsing is caused to postpone or malfunction to play significantly
Problem.
3. the bit stream data buffer size for parsing decoding parametric is restricted, for the program of high code rate, and
Not necessarily decoding parametric can be got from the first batch data, may cause the problem of program cannot play.
The explanation of nouns being related to:
DVB:Digital video broadcasting;
WiFi Dongle:A kind of reception live telecast, and the hardware device that it is gone out by wifi channel transfer;
Player:DST PLAYER;
UI:User interface;
PSI:How program specific information is multiplexed into a unified code for the heterogeneity in regulation difference program and program
Stream;
PID:In DTV multiplex system it effect can be compared to text document filename, we can it be referred to as " indicate
Code transmission packet ".
NIT:Network information table, the PID of the table are pointed out by PAT offer.NIT is mainly the knowledge to multiple path transmission flow
Not, NIT provides multiple path transmission flow, relevant some information of physical network and network transmission, such as frequency information for tuning
And coding mode, the information in terms of the parameters such as modulation system.
SDT:For describing the title of the road system Zhong Ge program, the supplier of the program, if there is the corresponding time to describe
The information of table etc..
PMT:Program Map Table, the table are pointed out by PAT offer.Pass through the letter for including in the available program of the table
Breath, for example, the road program is made of the type with these streams which stream(Video, audio, data), respectively stream corresponds in appointed program
PID.
ES:Basic unit program stream only includes a kind of data flow of content, such as containing only video or containing only audio;
CA_PMT:WIFI Dongle is used to from table required for the single program stream of acquisition in TS stream;
Tuner:Coordinator locks the frequency point of a frequency, that is, receives the digital television signal of specific frequency;
Demodulator:Demodulator, the signal code stream on frequency point for locking tuner solve normal stream;
Demux:Demultiplexing, TS stream is multi program multiplex stream, and demultiplexing can be by TS flow separation single-unit mesh audio/video flow;
Decoder:Decoder, by the digital audio/video frame data decoded back of compression at original video image and audio sequence
Column.
Summary of the invention
The present invention proposes a kind of TS stream method for quickly identifying to solve above-mentioned the problems of the prior art, including:
Step 1, start player, searching programs, and the program searched is generated into the rendition list;
Step 2, the program of viewing is wanted in user's selection;
Step 3, the code stream information of selected program is sent to adapter by player;
Step 4, player obtains corresponding program stream from adapter;
Step 5, caching filtration treatment successively is executed to the data packet of the program stream got, real time filtering obtains actual program and broadcasts
Information table is put, the information of non-present program is rejected, recalculates correction PSI/SI, and be inserted into program stream in real time;Real time filtering
The audio-video code stream of actual program is obtained, the audio-video code stream of non-present program is rejected, data packet is added according to the sequence of filtering
Enter into the caching of player;
Step 6, it is sent to decoder module by data cached, return step 4 continues to obtain and cache lower one piece of data, be performed simultaneously
Step 7;
Step 7, the decoder module is received data cached and is analyzed, and obtains the decoding parametric of program;
Step 8, if analysis failure, abandons current data, then return step 5 removes one section and data cached re-starts analysis;
If analyzing successfully, decoding and playing program.
The invention also provides a kind of TS to flow quick identification device, including:Code stream receiving module receives audio-video code stream;
Filtering module obtains actual program broadcast information table for real time filtering, rejects the information of non-present program, recalculate correction
PSI/SI, and be inserted into program stream in real time;Real time filtering obtains the audio-video code stream of actual program, rejects the sound of non-present program
Data packet is added according to the sequence of filtering into the caching of player video code flow;Decoder module, by the code stream in caching into
Row, which decodes and is sent to display screen, plays display;Command control module carries out command interaction between player and adapter.
The present invention rejects the interference information unrelated with actual program by the preanalysis and pretreatment to audio-video code stream
Or data, Adjustment and reform data information allow decoder module unit precisely quickly to parse decoding identification process, to contract
Between the sowing time of short program, achieve the purpose that quickly to export program pictures.Meanwhile increasing the retry mechanism of analysis decoding parametric,
Reduce the probability of parsing error, it is ensured that Player can be by the accurate decoded output of program stream.
Detailed description of the invention
Fig. 1 is flow chart of the invention;
Fig. 2 is caching process flow chart of the invention;
Fig. 3 is system block diagram of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out detailed, complete
Site preparation explanation.
As shown in Figure 1, TS proposed by the present invention flows method for quickly identifying, including:
Starting player, user selects automatic or manual searching programs, and the program searched is generated the rendition list, meanwhile,
The rendition list and relevant information can be stored in database by player;
User selects the program for wanting viewing from the rendition list;
The code stream information of selected program is sent to adapter WiFi Dongle by player;
Player obtains corresponding program stream from adapter;
Then player starts filtering reception PSI and the relevant bit stream data of program audio-video, i.e., successively to the program got
The data packet of stream executes caching filtration treatment, and real time filtering obtains actual program broadcast information table, rejects the letter of non-present program
Breath recalculates correction PSI/SI, and is inserted into program stream in real time;Real time filtering obtains the audio-video code stream of actual program, picks
Unless the audio-video code stream of actual program, data packet is added according to the sequence of filtering into the caching of player;
As shown in Fig. 2, its specific processing step is:Judge whether the data packet that player receives is SDT or PAT;If
It is SDT or PAT, then it is transformed, the information of non-present program and recalculates CRC in deletion table, make one
A table for describing single program stream;SDT/PAT original in code stream is replaced with SDT/PAT after transformation, it is ensured that its position and interval
It is completely the same with the position of original SDT/PAT and interval;If the data packet that player receives is not SDT or PAT, continue
Judge whether it is PMT;If the data packet is PMT, judge whether the PMT corresponds to actual program;If data packet be PMT but
And be not belonging to program selected by user, then lose the data packet;It determines that data packet is the PMT of actual program, it is transformed, is gone
Except the relevant descriptor of its non-ES;PMT original in code stream will be replaced using the PMT of transformation, it is ensured that its position and interval and original
The PMT of beginning is consistent;If the data packet that player receives is not PSI table, judge whether the TS packet is selected by user
Audio-video code stream, if not then losing the data packet;
Data packet is added in the caching of player according to the sequence being filled into;
Improved SDT, PAT are added again in the starting position of caching, pmt table can be solved quickly convenient for decoder module later
Decoding parametric is precipitated, the step can all be executed one time and be sent out again before the data cached first time of selected program is analyzed successfully
Decoder module is given, for promoting quick decoded success rate;
Then decoder module is issued by data cached, then proceeds by the caching filtration treatment of next batch data, this is cached
Filter processing continues uninterruptedly to carry out, and during decoded later, also has new data rear caching constantly processed;
Decoder module is analyzed data cached, and the decoding parametric of program is obtained;
If analysis failure, removes a segment encode flow data and re-starts analysis;
If analyzing decoding parametric success, it is decoded broadcasting program.
Fig. 3 shows adapter(wifi dongle)With mobile terminal(Such as mobile phone)Interaction block diagram, left side is suitable
The related block diagram of orchestration, coordinator and demodulator are used for frequency locking and receive code stream and the demodulation of DVB programme televised live, and will be after demodulation
Code stream issue descrambler.Smart card and descrambler are solved for descrambling ciphered program by the smart card that operator provides
It is close.Wifi module has built a set of server and client, is given the bit stream for the program that user selects by wifi module
Mobile terminal.
Right side is then the block diagram of relevant portion in mobile terminal, and mobile terminal has wifi module and display screen, and also
It contains TS proposed by the invention and flows quick identification device(Dotted portion in figure), wherein code stream receiving module passes through wifi mould
Block receives program stream.Filtering module obtains actual program broadcast information table for real time filtering, rejects the letter of non-present program
Breath recalculates correction PSI/SI, and is inserted into program stream in real time;Real time filtering obtains the audio-video code of actual program simultaneously
Stream rejects the audio-video code stream of non-present program, data packet is added according to the sequence of filtering into the caching of player.Decoding
Module, which is used to be analyzed, decoded and be sent to display screen for the code stream in caching, plays display.Command control module is playing
Command interaction is carried out between device and adapter.
Through the above technical solutions, the present invention, which is realized, carries out detection identification to currently playing audio-video code stream, reject
Improper program data information;Processing unit, which is monitored, by PSI/SI real-time program information table obtains actual program come real time filtering
Broadcast information table rejects interference information, recalculates correction PSI/SI, and be inserted into program stream in real time;PSI/ is used simultaneously
The pretreatment of SI table and Burst technology, i.e., it is additional first to parse required necessary PSI/ before AV program stream is pushed to decoder module
SI information promotes decoder module to accelerate identification parsing, between having shortened sowing time.Moreover, decoding can not be parsed by currently reading in data
When parameter, a segment encode flow data is read in again and carries out retrying parsing, has perfect mechanism for correcting errors.
Compare by experiment, prior art analysis decoding parameter temporal is up to 800 milliseconds, and uses skill of the invention
Process stabilization can be foreshortened to 400 milliseconds by art scheme;And prior art is excessive for PSI pressure or clarity/
The higher program of code rate using technical solution of the present invention, then can greatly reduce it is possible that program can not rise the phenomenon that broadcasting
The generation of this problem.
It should be understood that the above-mentioned description for specific embodiment is more detailed, can not therefore be considered to this
The limitation of invention patent protection range, scope of patent protection of the invention should be determined by the appended claims.
Claims (6)
1. a kind of TS flows method for quickly identifying, which is characterized in that including:
Step 1, start player, searching programs, and the program searched is generated into the rendition list;
Step 2, the program of viewing is wanted in user's selection;
Step 3, the code stream information of selected program is sent to adapter by player;
Step 4, player obtains corresponding program stream from adapter;
Step 5, caching filtration treatment successively is executed to the data packet of the program stream got, real time filtering obtains actual program and broadcasts
Information table is put, the information of non-present program is rejected, recalculates correction PSI/SI, and be inserted into program stream in real time;Real time filtering
The audio-video code stream of actual program is obtained, the audio-video code stream of non-present program is rejected, data packet is added according to the sequence of filtering
Enter into the caching of player;
Step 6, it is sent to decoder module by data cached, return step 4 continues to obtain and cache lower one piece of data, be performed simultaneously
Step 7;
Step 7, the decoder module is received data cached and is analyzed, and obtains the decoding parametric of program;
Step 8, if analysis failure, abandons current data, then return step 5 removes one section and data cached re-starts analysis;
If analyzing successfully, decoding and playing program.
2. TS as described in claim 1 flows method for quickly identifying, which is characterized in that in the slow of selected program in the step 5
Before deposit data is analyzed successfully for the first time, after the sequence of data packet installation filtering is added into the caching of player, caching
Head is plus the PSI/SI after correction.
3. TS as described in claim 1 flows method for quickly identifying, which is characterized in that the step 5 specifically includes:
Step 5.1, judge whether the data packet that player receives is SDT or PAT;
Step 5.2, if it is SDT or PAT, then it is transformed, the information of non-present program and is counted again in deletion table
CRC is calculated, the table for describing single program stream is made;
Step 5.3, SDT/PAT original in code stream is replaced with SDT/PAT after transformation;
Step 5.4, if the data packet that player receives is not SDT or PAT, continue to judge whether it is PMT;
Step 5.5, if the data packet is PMT, judge whether the PMT corresponds to actual program;
Step 5.6, data packet be PMT but and be not belonging to program selected by user, then lose the data packet;
Step 5.7, it determines that data packet is the PMT of actual program, it is transformed, remove the relevant descriptor of its non-ES;
Step 5.8, PMT original in code stream will be replaced using the PMT of transformation;
Step 5.9, if the data packet that player receives is not PSI table, judge whether the TS packet is the view of sound selected by user
Frequency code stream, if not then losing the data packet.
4. TS as described in claim 1 flows method for quickly identifying, which is characterized in that the adapter is wifi dongle.
5. TS as described in claim 1 flows method for quickly identifying, which is characterized in that the actual program broadcast information of the filtering
Table includes SDT, PAT, pmt table.
6. a kind of TS flows quick identification device, which is characterized in that including:
Code stream receiving module receives audio-video code stream;
Filtering module obtains actual program broadcast information table for real time filtering, rejects the information of non-present program, recalculate
PSI/SI is corrected, and is inserted into program stream in real time;Real time filtering obtains the audio-video code stream of actual program, rejects non-present program
Audio-video code stream, data packet is added according to the sequence of filtering into the caching of player;
Code stream in caching is decoded and is sent to display screen broadcasting display by decoder module;
Command control module carries out command interaction between player and adapter.
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CN116886678A (en) * | 2023-09-06 | 2023-10-13 | 中移(杭州)信息技术有限公司 | Abnormal code stream filtering method, system, electronic equipment and storage medium |
CN117412106A (en) * | 2023-09-21 | 2024-01-16 | 广州力加贺电子科技有限公司 | DVB-based data processing method, device and readable storage medium |
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CN109819332A (en) * | 2019-01-22 | 2019-05-28 | 重庆爱奇艺智能科技有限公司 | A kind of method and apparatus for improving acquisition program data performance |
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Application publication date: 20181130 |