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WO2016045209A1 - Procédé, dispositif et terminal de commutation de programme - Google Patents

Procédé, dispositif et terminal de commutation de programme Download PDF

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Publication number
WO2016045209A1
WO2016045209A1 PCT/CN2014/094152 CN2014094152W WO2016045209A1 WO 2016045209 A1 WO2016045209 A1 WO 2016045209A1 CN 2014094152 W CN2014094152 W CN 2014094152W WO 2016045209 A1 WO2016045209 A1 WO 2016045209A1
Authority
WO
WIPO (PCT)
Prior art keywords
program
audio
current
transmission
information
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.)
Ceased
Application number
PCT/CN2014/094152
Other languages
English (en)
Chinese (zh)
Inventor
林铠鹏
江楚发
苏志辉
杨慧
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen State Micro Technology Co Ltd
Original Assignee
Shenzhen State Micro Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shenzhen State Micro Technology Co Ltd filed Critical Shenzhen State Micro Technology Co Ltd
Publication of WO2016045209A1 publication Critical patent/WO2016045209A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • H04N21/434—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
    • H04N21/43—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
    • H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
    • H04N21/4383—Accessing a communication channel
    • H04N21/4384—Accessing a communication channel involving operations to reduce the access time, e.g. fast-tuning for reducing channel switching latency

Definitions

  • the invention belongs to the field of television, and in particular relates to a program switching method, device and terminal.
  • the most widely used and most common application for digital image communication is the digital television broadcasting system, and the corresponding DVB (Digital Video)
  • the establishment of the Broadcasting (Digital Video Broadcasting) standard has accelerated the large-scale application of digital television broadcasting devices.
  • the DVB standard encodes a source to form a TS stream (Transport) Stream, transport stream), and then multiple TS streams are multiplexed to form MPTS (Multi-program transport Stream, multi-program transport stream), and then transmitted through different media such as satellite and cable TV.
  • PAT is extracted from the TS packet with PID 0x0 (program association Table, program association table), according to the current SPTS found in the PAT, the current program PMT is transmitted.
  • the code code transmits the package PID, extracts the program PMT from the SPTS, analyzes the PMT, and acquires the current program audio and video ES (elementary) Stream, elementary stream)
  • the data tag code conveys the packet PID and the type of audio and video format, which in turn initializes the decoder.
  • Embodiments of the present invention provide a program switching method to shorten a program switching time in a digital television broadcasting system.
  • the invention provides a program switching method, comprising the following steps:
  • Receiving a current program delivery stream Receiving a current program delivery stream, acquiring current program audio and video type information, and transmitting identification information of the current program delivery stream audio and video data;
  • the transmission identification information of the current program transmission audio and video data is replaced with the transmission identification information of the previous program transmission audio and video data
  • the program map information of a program replaces the program map information of the current program, and the current program transport stream replaced by the transfer identifier information and the program map information is transmitted to the media player for playback.
  • the invention also provides a program switching device, comprising:
  • a transport stream converting unit configured to convert the multi-program program stream provided by the broadcast television network into a single program program stream of the current program.
  • a data acquisition unit receiving the current program delivery stream, acquiring current program audio and video type information, and transmitting identification information of the current program delivery stream audio and video data;
  • a program mapping information acquiring unit which acquires program mapping information of the previous section
  • a program type information comparison unit for determining whether the current program audio and video type information is the same as the previous program audio and video type information
  • the transport stream processing unit when determining that the current program audio and video type information is the same as the previous program audio and video type information, replacing the transmission identification information of the current program transmission audio and video data with the transmission of the previous program transmission audio and video data
  • the identification information is replaced with the program mapping information of the current program by the program mapping information of the previous section, and the current program delivery stream replaced by the transmission identification information and the program mapping information is transmitted to the media player for playing.
  • the present invention further provides a terminal, including a communication interface, an input device, and an output device, wherein the terminal further includes a program switching device, and the program switching device is connected to the input device and the output device through a communication interface.
  • the program switching device includes:
  • a transport stream converting unit configured to convert the multi-program program stream provided by the broadcast television network into a single program program stream of the current program.
  • a data acquisition unit receiving the current program delivery stream, acquiring current program audio and video type information, and transmitting identification information of the current program delivery stream audio and video data;
  • a program mapping information acquiring unit which acquires program mapping information of the previous section
  • a program type information comparison unit for determining whether the current program audio and video type information is the same as the previous program audio and video type information
  • the transport stream processing unit when determining that the current program audio and video type information is the same as the previous program audio and video type information, replacing the transmission identification information of the current program transmission audio and video data with the transmission of the previous program transmission audio and video data
  • the identification information is replaced with the program mapping information of the current program by the program mapping information of the previous section, and the current program delivery stream replaced by the transmission identification information and the program mapping information is transmitted to the media player for playing.
  • the method for program switching replaces the transmission identification information of the current program transmission audio and video data with the transmission identifier of the previous program transmission audio and video data when determining that the current program type is the same as the previous program type.
  • Information replacing the program mapping information of the current program with the program mapping information of the previous section, and transmitting the current program delivery stream replaced by the transmission identification information and the program mapping information to the media player for playing, so that the current program transmits the audio and video data.
  • the transmission identification information and the program mapping information of the current program are the same as the transmission identification information of the previous program transmission audio and video data and the program mapping information of the previous program, so that the current audio and video programs can be directly played without resetting the media player. It saves time for initializing the decoder and shortens the program switching time.
  • FIG. 1 is a flowchart of implementing a program switching method according to Embodiment 1 of the present invention
  • FIG. 2 is a flowchart of implementing a program switching method according to Embodiment 2 of the present invention.
  • FIG. 3 is a schematic structural diagram of a program switching apparatus according to Embodiment 3 of the present invention.
  • FIG. 4 is a schematic structural diagram of a terminal according to Embodiment 4 of the present invention.
  • the audio and video program switching method provided by the embodiment of the present invention when determining that the current program type is the same as the previous program type, causes the current program to transmit the transmission identification information of the audio and video data and the program mapping information of the current program by the alternative manner. It is the same as the transmission identification information of the previous program to transmit audio and video data and the program mapping information of the previous section, so the current audio and video programs can be directly played without resetting the media player, saving the time for initializing the decoder and shortening the program. Switch time.
  • FIG. 1 is a flowchart showing an implementation process of a program switching method according to Embodiment 1 of the present invention, which is described in detail as follows:
  • step S101 the current program delivery stream is received, the current program audio and video type information, and the transmission identification information of the current program delivery stream audio and video data are acquired.
  • the current program audio and video type information may be obtained from a digital television signal during a search process, or may be obtained by parsing from a current program delivery stream.
  • the transmission identification information is a flag code transmission packet PID.
  • the identifier code transmission packet PID of the current program delivery stream audio and video data may be obtained from the digital television signal during the search process, or may be obtained by parsing from the current program transmission stream.
  • the audio type information includes but is not limited to ISO/IEC 11172 Audio, ISO/IEC 13818-3 Audio, AAC, AC3.
  • the video type information includes but is not limited to ISO/IEC 11172 Video, ISO/IEC 13818-2 Video, H264, H265, AVS, AVS+.
  • step S102 it is determined whether the current program audio and video type information is the same as the previous program audio and video type information. If the determination result is yes, the process proceeds to step S103; if the determination result is negative, the process proceeds to step S104.
  • the previous program audio and video type information is obtained from the digital television signal during the search process or is parsed from the previous program transmission stream.
  • step S103 the transmission identification information of the current program transmission audio and video data is replaced with the transmission identification information of the previous program transmission audio and video data, and the program mapping information of the current program is replaced with the program mapping information of the previous section, and The current program delivery stream replaced by the transmission identification information and the program mapping information is transmitted to the media player for playback.
  • the transmission identification information is the identification code transmission packet PID
  • the identification code transmission packet PID is obtained from the digital television signal during the search process or is parsed from the previous program transmission stream.
  • the program map information is a program map table PMT.
  • replacing the program mapping table PMT of the current program with the program mapping table PMT of the previous section specifically includes the following steps:
  • each transport packet can only transmit a maximum of 188 bytes, for a program map PMT containing more than 188 bytes, the program map table PMT can be packaged into a plurality of transport packets.
  • the transport packet of the program map PMT of the current program is replaced with the transport packet of the program map PMT of the previous section.
  • the transport packet of the program map PMT of the current program is repeated and continuously transmitted, the transport packet of the program map PMT of the current program is replaced with the transport packet of the program map PMT of the previous section as a loop process.
  • step S104 the current program transmission stream is output to the media player for playback.
  • the program switching method provided by the embodiment of the present invention transmits the stream audio and current when the current program audio and video type is the same as the previous program audio and video type.
  • the code code transmission packet PID of the video data is replaced with the flag code transmission packet PID of the previous program transmission stream audio and video data
  • the program map PMT of the current program is replaced with the program map PMT of the previous section, and transmitted to the media player. So that the media player plays the current program transport stream that has been replaced by the code code transport packet PID and the program map table PMT. Since the current program transmits the audio code and the data code, the code code transport packet PID, PMT and the current program of the previous program are transmitted.
  • the code code transmission package PID of the audio and video data is the same as the program mapping table PMT, and the current audio and video programs can be directly played without resetting the media player, saving the time for the media player to reset, and realizing the audio and video programs quickly. Switch.
  • FIG. 2 is a flowchart showing an implementation process of a program switching method according to Embodiment 2 of the present invention, which is described in detail as follows:
  • the method further includes:
  • Step S201 converting the multi-channel program delivery stream provided by the broadcast television network into a single-channel program transmission stream of the current program.
  • the video stream provided by the broadcast television network is a multi-channel program transport stream
  • the current program transport stream played by the smart terminal is a single-channel program transport stream
  • it is required to transmit the multi-channel program provided by the broadcast television network.
  • the stream is converted to the current program delivery stream for the media player of the smart terminal to play.
  • a multi-channel program delivery stream provided by a broadcast television system is converted into a current program single-channel program transmission stream by the following method:
  • the one-way program association table PAT, the program map table PMT, and the audio and video data are the current program transport streams.
  • the method further includes:
  • Step S202 acquiring program mapping information of the previous section.
  • the program mapping information is the program mapping table PMT
  • the program link table PMT of the previous section is directly extracted in the previous program transmission stream, or audio and video according to the previous section.
  • FIG. 3 shows the structure of a program switching apparatus according to an embodiment of the present invention. For the convenience of description, only parts related to the embodiment of the present invention are shown.
  • the device may be a software unit of a conditional receiver or a smart terminal device, a hardware unit or a unit of soft and hard combination.
  • the program switching device 10 includes:
  • the transport stream converting unit 11 converts the multi-channel program transport stream provided by the broadcast television network into a one-way program transport stream of the current program.
  • the data obtaining unit 12 receives the current program delivery stream, acquires current program audio and video type information, and transmission identification information of the current program delivery stream audio and video data;
  • the program mapping information acquiring unit 13 acquires program mapping information of the previous section
  • the program type information comparison unit 14 determines whether the current program audio and video type information is identical to the previous program audio and video type information
  • the transport stream processing unit 15 replaces the transmission identification information of the current program transmission audio and video data with the previous program transmission audio and video data when it is judged that the current program audio and video type information is the same as the previous program audio and video type information.
  • the identification information is transmitted, the program mapping information of the current program is replaced with the program mapping information of the previous section, and the current program delivery stream replaced by the transmission identification information and the program mapping information is transmitted to the media player for playback.
  • the transmission identification information is a flag code transmission packet PID
  • the program mapping information is a program mapping table PMT.
  • the data acquisition unit 12 when the transmission identifier information is the identifier code transmission packet PID, the data acquisition unit 12 includes:
  • the search data acquisition unit 121 acquires the current program audio and video type information and the flag code transmission package PID of the current program delivery stream audio and video data from the digital television signal during the search process; or
  • the parsing data obtaining unit 122 parses and retrieves the current program audio and video type information and the flag code transport packet PID of the current program transport stream audio and video data from the current program transport stream.
  • At least one of the search data acquisition unit 121 or the analysis data acquisition unit 122 may be present.
  • the program mapping information acquiring unit 13 when the program mapping information is the program mapping table PMT, the program mapping information acquiring unit 13 includes:
  • the PMT extracting unit 131 is configured to directly extract the program map PMT of the previous section in the previous program transport stream; or
  • the PMT reconstruction unit 132 is configured to reconstruct the program link table PMT of the previous section according to the audio and video type information of the previous section and the identifier transmission packet PID of the previous program transmission stream audio and video data.
  • At least one of the PMT extraction unit 131 or the PMT reconstruction unit 132 may be present.
  • the transport stream processing unit 15 when the program mapping information is the program mapping table PMT, the transport stream processing unit 15 includes:
  • the PMT encapsulating unit 151 encapsulates the PID code packet of the previous section into at least one transport packet
  • each transport packet can only transmit a maximum of 188 bytes, for a program map PMT containing more than 188 bytes, the program map table PMT can be packaged into a plurality of transport packets.
  • the PMT replacement unit 152 replaces the transport packet of the program map PMT of the current program with the transport packet of the program map PMT of the previous section.
  • the transport packet of the program map PMT of the current program is repeated and continuously transmitted, the transport packet of the program map PMT of the current program is replaced with the transport packet of the program map PMT of the previous section as a loop process.
  • the program switching apparatus transmits the stream audio and current when the current program audio and video type is the same as the previous program audio and video type.
  • the code code transmission packet PID of the video data is replaced with the flag code transmission packet PID of the previous program transmission stream audio and video data
  • the program map PMT of the current program is replaced with the program map PMT of the previous section, and transmitted to the media player. So that the media player plays the current program transport stream that has been replaced by the code code transport packet PID and the program map table PMT. Since the current program transmits the audio code and the data code, the code code transport packet PID, PMT and the current program of the previous program are transmitted.
  • the code code transmission package PID of the audio and video data is the same as the program mapping table PMT, and the current audio and video programs can be directly played without resetting the media player, saving the time for the media player to reset, and realizing the audio and video programs quickly. Switch.
  • FIG. 4 shows the structure of a terminal provided by an embodiment of the present invention. For the convenience of description, only parts related to the embodiment of the present invention are shown.
  • the terminal includes:
  • the program switching device 10 is connected to the communication interface 20 and includes:
  • the transport stream converting unit 11 converts the multi-channel program transport stream provided by the broadcast television network into a one-way program transport stream of the current program.
  • the data obtaining unit 12 receives the current program delivery stream, acquires current program audio and video type information, and transmission identification information of the current program delivery stream audio and video data;
  • the program mapping information acquiring unit 13 acquires program mapping information of the previous section
  • the program type information comparison unit 14 determines whether the current program audio and video type information is identical to the previous program audio and video type information
  • the transport stream processing unit 15 replaces the transmission identification information of the current program transmission audio and video data with the previous program transmission audio and video data when it is judged that the current program audio and video type information is the same as the previous program audio and video type information.
  • the identification information is transmitted, the program mapping information of the current program is replaced with the program mapping information of the previous section, and the current program delivery stream replaced by the transmission identification information and the program mapping information is transmitted to the media player for playback.
  • the communication interface 20 is connected to the program switching device 10, the input device 30, and the output device 40, respectively, to implement data communication between the program switching device 10 and other devices such as the input device 30 and the output device 40.
  • the input device 30 is connected to the communication interface 20, receives a play command of the user, and transmits it to the communication interface 20.
  • the input device 30 includes, but is not limited to, a button, a mouse, a keyboard remote controller, and the like.
  • the output device 40 is connected to the communication interface 20, and receives and outputs a digital television signal transmitted by the communication interface 20 and processed by the program switching device 10.
  • the output device 40 includes, but is not limited to, a player, a display screen, a speaker, and the like.
  • the terminal includes, but is not limited to, a smart TV, a conditional receiver, a network box, and the like.
  • the terminal replaces the identifier code transmission packet PID of the current program delivery stream audio and video data with the previous program delivery stream audio when determining that the current program audio and video type is the same as the previous program audio and video type.
  • the code data transmission package PID of the video data replaces the program map PMT of the current program with the program map PMT of the previous section, and transmits it to the media player, so that the media player transmits the package PID and the program map to the flag code.
  • the current program transport stream replaced by the table PMT is played, and the flag code transport packet PID, PMT of the current program transmitting audio and video data is the same as the code code transport packet PID of the current program transmitting audio and video data of the previous program, and the program map PMT.
  • the current audio and video programs can be directly played without resetting the media player, saving the time for the media player to reset, and enabling fast switching of audio and video programs.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

La présente invention est appropriée pour le domaine des télévisions. La présente invention concerne un procédé de commutation de programme, comprenant les étapes suivantes consistant à : recevoir un flux de transport de programme courant, et obtenir des informations de type audio et vidéo de programme courant et des informations d'identification de transport de données audio et vidéo de flux de transport de programme courant; lorsqu'il est déterminé que les informations de type audio et vidéo de programme courant sont les mêmes que des informations de type audio et vidéo de programme précédent, remplacer les informations d'identification de transport des données audio et vidéo de transport de programme courant par les informations d'identification de transport des données audio et vidéo de transport de programme précédent, remplacer des informations de carte de programme du programme courant par les informations de carte de programme du programme précédent, et transporter le flux de transport de programme courant, avec les informations d'identification de transport et les informations de carte de programme de celui-ci remplacées, vers un lecteur multimédia pour lire celui-ci. Le procédé de commutation de programme décrit dans un mode de réalisation de la présente invention peut directement lire le programme audio et vidéo courant sans réinitialiser le lecteur multimédia, de telle sorte qu'un temps pour initialiser un décodeur est économisé, permettant ainsi de raccourcir le temps de commutation de programme.
PCT/CN2014/094152 2014-09-28 2014-12-18 Procédé, dispositif et terminal de commutation de programme Ceased WO2016045209A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201410510559.9 2014-09-28
CN201410510559.9A CN104270667A (zh) 2014-09-28 2014-09-28 一种节目切换方法、装置及终端

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WO2016045209A1 true WO2016045209A1 (fr) 2016-03-31

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WO (1) WO2016045209A1 (fr)

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CN114554256A (zh) * 2020-11-25 2022-05-27 阿里巴巴集团控股有限公司 媒体流播放、媒体流处理方法、装置、设备和存储介质

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CN114554256A (zh) * 2020-11-25 2022-05-27 阿里巴巴集团控股有限公司 媒体流播放、媒体流处理方法、装置、设备和存储介质
CN114554256B (zh) * 2020-11-25 2024-11-22 阿里巴巴集团控股有限公司 媒体流播放、媒体流处理方法、装置、设备和存储介质

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