WO2008022501A1 - Procédé de diffusion en multimédia mobile de flots multividéo - Google Patents

Procédé de diffusion en multimédia mobile de flots multividéo Download PDF

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Publication number
WO2008022501A1
WO2008022501A1 PCT/CN2006/003759 CN2006003759W WO2008022501A1 WO 2008022501 A1 WO2008022501 A1 WO 2008022501A1 CN 2006003759 W CN2006003759 W CN 2006003759W WO 2008022501 A1 WO2008022501 A1 WO 2008022501A1
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WO
WIPO (PCT)
Prior art keywords
video
data
channel
header
transmitted
Prior art date
Application number
PCT/CN2006/003759
Other languages
English (en)
Chinese (zh)
Inventor
Can Shen
Zhiying Wang
Original Assignee
Zte Corporation
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 Zte Corporation filed Critical Zte Corporation
Publication of WO2008022501A1 publication Critical patent/WO2008022501A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/24—Systems for the transmission of television signals using pulse code modulation
    • 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]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
    • H04N21/2365—Multiplexing of several video streams
    • 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]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
    • 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
    • H04N21/4347—Demultiplexing of several video streams
    • 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]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/61—Network physical structure; Signal processing
    • H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
    • H04N21/6131—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving transmission via a mobile phone network

Definitions

  • the present invention relates to the field of mobile multimedia broadcast or mobile TV technology, and in particular, to a method for implementing multiple video streams of a mobile multimedia broadcast channel.
  • Mobile multimedia broadcasting is a multimedia playback technology that has emerged in recent years. With a handheld terminal, you can watch TV at high speeds. The terminal receives the program list through the wireless protocol, and can select the channel that has the right to watch, so that the multimedia data of the selected channel can be accepted, and the television is watched on the mobile terminal.
  • the air data transmitted by the broadcasting system is divided into different channels and transmitted separately by multiplexing technology. The terminal can receive relevant data and realize normal playing of the television through the player on the terminal.
  • the system can send 1 channel of video or send multiple channels of video signals.
  • the TS protocol is one of the MPEG (Moving Picture Experts Group) standards. It transmits video, audio and control information in a fixed 188-byte packet, and distinguishes different videos by PID (program number) field. Streaming, which can support the playback of multiple video streams. However, each packet of the TS method is small and inefficient.
  • the second is the ISMA (Internet Streaming Media Alliance) approach.
  • the ISMA specification uses RTP (Real-Time Transport Protocol) to transport media information.
  • a method is provided that can implement multiple video streams in a mobile multimedia broadcast system such that multiple video streams can be transmitted in a mobile multimedia broadcast system and improve the efficiency of transmission of video streams in a mobile multimedia broadcast system.
  • the technical solution of the present invention is as follows:
  • a method for implementing a mobile multimedia broadcast multiple video stream includes the following steps:
  • each video unit having a number of a respective video stream; (2) selecting, if several thousand divided video units, from a plurality of video streams, Composing a video data, and recording the length, video stream number, and time information of each video unit in the video header of the video data;
  • the video data and other data to be transmitted are encapsulated and transmitted in one channel.
  • synchronization header isolation can be used between each video unit in one video data.
  • the video packet header of the step (2) further records frame type information of each video unit.
  • the other data to be transmitted in the above step (3) includes: packet header data, video data, audio data, and synchronization data of each channel.
  • the foregoing step (3) further includes the following steps: (31) dividing the multimedia broadcast into multiple channels in a time division multiplexing manner, where there is one control channel and at least one data channel;
  • (32) respectively assigning one or more data channels to each channel of the multimedia broadcast for transmitting real-time multimedia data of each channel;
  • the control information and the program list information are encapsulated in the control channel transmission, and the packet header data, the video data, the audio data, and the synchronization data of each channel are encapsulated in a data channel corresponding to the channel.
  • the invention divides into multiple video units by 4 bar each video stream, and 4 bar multiple video streams are installed in one channel, and multiple video units are used to transmit multiple video streams, so that the same video data can be realized. Transmitting multiple video streams.
  • the present invention is a method for implementing one channel multiplex video suitable for use in a broadcast network, and is particularly suitable for use in a mobile broadcast network.
  • the form of the multimedia service data transmitted in one channel may be various.
  • the embodiment of the present invention provides a form in which multimedia service data transmitted in one channel may be used by the packet header.
  • the packet header mainly includes control information, and specifically includes: length information, program information, video parameters, audio parameters, synchronization data parameters, time stamps, data security parameters, and packet header check codes.
  • the header check code can also verify the reliability of the header information, which is a field used to implement data encryption.
  • the main problem to be solved by the present invention is how to package multiple video streams in one channel. Taking the composition form of the service data in one channel shown in FIG. 1 as an example, that is, how to make the video data therein carry multiple video streams. Therefore, according to an embodiment of the present invention, each video stream that needs to be transmitted may be separately divided into a plurality of video units, each video unit having a number of a respective video stream, and each video unit is isolated by a synchronization header. To achieve the function of error isolation.
  • a plurality of divided video units are respectively selected from the plurality of video streams to form a video data, and the length, video stream number, and timestamp information of each video unit are recorded in a video header of the video data.
  • the length of the video unit can be used to locate and divide each video unit data, the time stamp refers to the playing time, and the video stream number is used to identify which video stream the video unit belongs to. Due to the scalability of the video header information, the length of the video unit included in the above video data is variable.
  • the frame type information of each frequency unit can also be recorded in the video header, and the frame type of the video unit is used to mark Know that this video unit is a keyframe, non-keyframe.
  • Step 1 Divide the multimedia broadcast into multiple channels in a time division multiplexing manner, wherein there is one control channel and at least one control channel.
  • a data channel; a radio broadcast can transmit one full frame structure data in a fixed time interval, the fixed time interval can be 1 second, or other time values, and the full frame is composed of all channels of the above divided channels.
  • Step 2 Each channel of the multimedia broadcast is respectively assigned one or more data channels for transmitting real-time multimedia data of each channel;
  • Step 3 encapsulating the control information and the program list information in the control channel for transmission, each will The header data, video data, audio data, and synchronization data of the channels are encapsulated in the data channel corresponding to the channel.
  • the implementation details of the present invention are specifically described below by taking two video streams as an example. As shown in FIG. 2, it is assumed that two video streams are transmitted in one channel, and it is assumed that the first video stream is divided into 15 video units, and the second video stream is divided into 10 video units, at a certain After sequentially selecting and combining into one video data, the video data includes the two video streams.
  • the first video stream includes: video units 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 22, 23, 24, 25,
  • the second video stream includes: video units 2, 4, 6, 8, 10, 12, 14, 16, 18, 20.
  • the video data and the header data, the audio data, and the synchronization data can be encapsulated and transmitted in one channel.
  • the specific implementation of the two video streams shown in FIG. 2 is to cross-select the video units of the two video streams, the present invention is not limited to any order. Since the description information of each video unit in the ⁇ frequency packet header, including the video stream number of the video unit, can clearly identify which video stream each video unit belongs to, the video units of the two video streams may not completely follow the picture.
  • the order of the order in 2 that is, the order in Fig.
  • 4 non-column order may have no rules.
  • the above is the implementation process of transmitting two video streams in one channel. According to the same principle, it can be realized. One video stream, two video streams, or more than two video streams are simultaneously transmitted in one channel. In an experiment conducted in accordance with an embodiment of the present invention, it is assumed that each data channel has a rate of 128 Kbit/s, and one channel includes two data channels, which may have a rate of 256 Kbit/s.
  • the channel includes: the header is 122 bytes long, the video header is 127 bytes long, and the video data is 26.5K bytes long.
  • the bandwidth of the first video stream is 20. 5K bytes, and the bandwidth of the second video stream is 6K words.
  • Section, the audio header is 129 bytes long, the audio data is 4K bytes long, and the synchronous data is 1K bytes long. For parts less than 32K bytes, all 0s can be filled.
  • Such a TV channel can satisfy the transmission of 1 QVGA resolution, 25 frames of H264 or AVS-M video data, and the transmission of a QCIF, 12 frames of H264 or AVS-M video data, which can provide users with considerable Satisfied quality of dual video streaming mobile radio and television shows.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Databases & Information Systems (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

Ce procédé de diffusion en multimédia mobile de flots multividéo consiste à : 1) diviser chaque flot vidéo devant être émis vers plusieurs unités vidéo, chaque unité vidéo ayant un code de flot vidéo; 2) sélectionner un nombre d'unités vidéo divisées à partir d'un nombre de flots vidéo, composer des données vidéo et enregistrer chaque longueur d'unité vidéo, le code de flot vidéo et le message horodaté dans la tête de paquet vidéo des données vidéo; 3) mettre en paquets les données vidéo et d'autres données devant être émises vers un canal. Le procédé permet d'effectuer la transmission de flots vidéo dans un système de diffusion en multimédia mobile et d'en améliorer l'efficacité.
PCT/CN2006/003759 2006-08-16 2006-12-30 Procédé de diffusion en multimédia mobile de flots multividéo WO2008022501A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200610109828.6 2006-08-16
CNB2006101098286A CN100518074C (zh) 2006-08-16 2006-08-16 一种移动多媒体广播多视频流的实现方法

Publications (1)

Publication Number Publication Date
WO2008022501A1 true WO2008022501A1 (fr) 2008-02-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2006/003759 WO2008022501A1 (fr) 2006-08-16 2006-12-30 Procédé de diffusion en multimédia mobile de flots multividéo

Country Status (2)

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CN (1) CN100518074C (fr)
WO (1) WO2008022501A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112166618A (zh) * 2019-04-29 2021-01-01 百度时代网络技术（北京）有限公司 自动驾驶车辆中具有压缩视频流的多传感器数据存储
CN112839242A (zh) * 2020-12-31 2021-05-25 四川长虹网络科技有限责任公司 音视频媒体文件封装实现方法

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CN107360130B (zh) * 2010-04-20 2021-05-07 三星电子株式会社 用于传送和接收媒体数据的接口装置和方法
CN102780916B (zh) * 2012-04-12 2015-03-18 天脉聚源(北京)传媒科技有限公司 一种视频直播流汇聚分发方法
CN102710968A (zh) * 2012-05-22 2012-10-03 袁华安 云电视系统中视频流同步方法
CN102710967A (zh) * 2012-05-22 2012-10-03 袁华安 一种云电视系统与方法
CN102917276B (zh) * 2012-11-12 2016-02-24 武汉市烽视威科技有限公司 一种应用于流媒体服务的音视频交错封装方法
FR3030978A1 (fr) * 2014-12-23 2016-06-24 Orange Generation d'une mosaique de videos
CN105979289A (zh) * 2015-12-03 2016-09-28 乐视致新电子科技（天津）有限公司 一种视频的生成、播放方法和装置

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CN1482800A (zh) * 2002-07-31 2004-03-17 松下电器产业株式会社 记录设备和计算机可读程序
CN1512768A (zh) * 2002-12-30 2004-07-14 皇家飞利浦电子股份有限公司 一种在hd-dvd系统中用于生成视频目标单元的方法

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EP0944269A1 (fr) * 1996-12-04 1999-09-22 Matsushita Electric Industrial Co., Ltd. Disque optique pour enregistrement optique d'images tridimensionnelles a haute resolution, dispositif de reproduction a disque optique, et dispositif d'enregistrement a disque optique
EP0910214A1 (fr) * 1997-03-05 1999-04-21 Matsushita Electric Industrial Co., Ltd. Procede de transmission de donnees numeriques, dispositif d'emission de donnees numeriques et dispositif de reception de donnees numeriques
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CN1512768A (zh) * 2002-12-30 2004-07-14 皇家飞利浦电子股份有限公司 一种在hd-dvd系统中用于生成视频目标单元的方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112166618A (zh) * 2019-04-29 2021-01-01 百度时代网络技术（北京）有限公司 自动驾驶车辆中具有压缩视频流的多传感器数据存储
CN112166618B (zh) * 2019-04-29 2022-07-12 百度时代网络技术（北京）有限公司 自动驾驶系统、自动驾驶系统的传感器单元、用于操作自动驾驶车辆的计算机实现的方法
CN112839242A (zh) * 2020-12-31 2021-05-25 四川长虹网络科技有限责任公司 音视频媒体文件封装实现方法

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Publication number Publication date
CN100518074C (zh) 2009-07-22
CN1960268A (zh) 2007-05-09

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