WO2008043212A1 - Procédé de transfert de données d'assistance dans une diffusion multimédia mobile - Google Patents

Procédé de transfert de données d'assistance dans une diffusion multimédia mobile Download PDF

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Publication number
WO2008043212A1
WO2008043212A1 PCT/CN2006/003755 CN2006003755W WO2008043212A1 WO 2008043212 A1 WO2008043212 A1 WO 2008043212A1 CN 2006003755 W CN2006003755 W CN 2006003755W WO 2008043212 A1 WO2008043212 A1 WO 2008043212A1
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WO
WIPO (PCT)
Prior art keywords
data
auxiliary data
segment
channel
header
Prior art date
Application number
PCT/CN2006/003755
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English (en)
Chinese (zh)
Inventor
Can Shen
Zhijun Dai
Xiangbiao Yan
Zhiying Wang
Jianqiang Zhang
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 WO2008043212A1 publication Critical patent/WO2008043212A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/40—Connection management for selective distribution or broadcast

Definitions

  • the present invention relates to multimedia broadcast technologies, and more particularly to a method of communicating auxiliary data in a mobile multimedia broadcast.
  • BACKGROUND OF THE INVENTION 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 system is divided into different channels.
  • the data of each channel includes three types: video, audio and auxiliary data.
  • the terminal can receive relevant data, and the normal playback of the TV can be realized through the player on the terminal.
  • Auxiliary data is used to implement subtitles, pictures, file downloads, IP multicast applications, and is an important complement to real-time playback of video and audio streams in broadcast networks. There are two ways to install the existing auxiliary data:
  • Transport stream TS mode is one of the Moving Picture Experts Group MPEG standard, which transmits auxiliary data, video and audio in a fixed 188-byte packet.
  • RTP mode which is a method for transmitting auxiliary data, video, and audio data on an IP network.
  • the size of the packet is not fixed.
  • the time stamp of each packet header is used to ensure the time synchronization of the playback, and the serial number is used to ensure The order in which the packages are played.
  • the RTP method can only be used on an IP network. Since the RTP header, UDP header and IP header are relatively large, the smaller each RTP packet, the larger the overhead, and it is not suitable for transmitting each packet. Compare the auxiliary data of 'j.
  • the size of the TS mode is fixed. A piece of data is divided into multiple TS packets for transmission. The last packet can not be completely used up.
  • the transmission efficiency of the TS mode is relatively low, about 80% to 90%.
  • the wireless bandwidth that the service network can provide to each mobile terminal is very limited, and sufficient transmission rate is needed to meet the clear display of the clear terminal, but the lower efficiency of the auxiliary data transmission necessarily results in a corresponding reduction in the actual transmission rate of the audio and video data.
  • the auxiliary data that can be transmitted is reduced, so that the quality of audio and video output by the mobile terminal is degraded or more subtitles, pictures, file downloads, and IP multicast applications cannot be realized.
  • the technical problem to be solved by the present invention is to provide a method for transmitting auxiliary data in a mobile multimedia broadcast, which can improve auxiliary data transmission efficiency, and thus can realize more subtitles, pictures, file downloading, and group insertion applications.
  • the above technical problem of the present invention is solved by providing a method for transmitting auxiliary data in a mobile multimedia broadcast, using a service network and a mobile terminal in its coverage, characterized in that an auxiliary data segment is specifically opened in the channel data, The auxiliary data to be sent for a period of time is assembled in the auxiliary data segment, and further includes the following steps:
  • the auxiliary data segment includes a segment header and the auxiliary data segment includes a segment header and N auxiliary data units accommodating each piece of auxiliary data, the segment header including the auxiliary data unit The number N and the length of each of the auxiliary data units.
  • the N is a natural number greater than 1, and N can be changed, and a variable length means is adopted instead of the TS type fixed length filling mode, thereby further improving the transmission efficiency of the auxiliary data.
  • the auxiliary data includes the auxiliary data type number and specific content.
  • the type includes subtitles, pictures, file downloads or IP multicast.
  • the segment header further includes a check code.
  • the channel data further includes a packet header, and the packet header includes a packet header length and a length of the auxiliary data segment.
  • the channel data may further include a video data segment, and the packet header further includes a video data segment length and a video parameter set.
  • the channel data may further include an audio data segment, and the packet header further includes an audio data segment length and an audio parameter set.
  • the packet header further includes a packet header check code.
  • the wireless service channel is one or more, and respectively transmits channel data corresponding to respective different channels.
  • the wireless service channel is a wireless channel adopting a channel multiplexing technology, and the multiplexing technology includes time division, frequency division or code division.
  • FIG. 1 is a schematic diagram of a media stream being transmitted in a service channel. 1 includes the header, video, audio and auxiliary data required for a complete channel.
  • Figure 2 is a schematic diagram of the internal logical relationship of the auxiliary data component of the frame structure shown in Figure 1.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The auxiliary data will be packaged together for a period of time to realize the transmission of auxiliary data, including the following aspects:
  • the channel data of one service channel is composed of a packet header, a video data segment, a voice data segment, Auxiliary data segment composition.
  • the auxiliary data segment is composed of an auxiliary data segment header and a plurality of auxiliary data units.
  • the auxiliary data segment header is the length describing each auxiliary data unit.
  • Each auxiliary data unit can encapsulate the contents of the auxiliary data and its attributes. Further, the method for encapsulating auxiliary data according to the present invention is illustrated. As shown in FIG. 1, one service channel corresponds to one channel, and data of one channel is sent once in a fixed time interval, and the fixed time interval may be one second. Can be other time values.
  • the data of one channel is composed of a packet header 10, a video data segment 11, a voice data segment 12, and an auxiliary data segment 13.
  • the main information in Baotou 10 is some control information, which must be provided.
  • the main contents of the packet header 10 are: the length of the packet header, the length of the video data segment, the length of the audio data segment, the length of the auxiliary data segment, the video parameter set, the audio parameter set, the time stamp, the header check code, and the like.
  • the header check code can verify the reliability of the header information.
  • the timestamp is used to guarantee the display time of the auxiliary data on the screen.
  • the video data segment 11, the voice data segment 12, and the auxiliary data segment 13 are all selectively present, one or more of which may appear, and whether the three data segments appear can be judged from the corresponding control field in the packet header 10. As shown in FIG.
  • the auxiliary data segment 13 is composed of a segment header 130 and N auxiliary data units 131, and N can be changed, and the specific value of N is determined according to actual needs in a period of time.
  • the relevant information of the auxiliary data unit 131 is described in the header 130, and part of the header 130 is: (1) The total number of auxiliary data.
  • Each of the auxiliary data units 131 is variable length, without padding data, and improves the utilization of the auxiliary data transmission in comparison with the TS encapsulation method.
  • the check code is to prevent errors and improve reliability.
  • the auxiliary data unit 131 is packaged with specific contents, and may include subtitles, pictures, files, and IP packets, and can realize various services. The present invention is further described below by comparing a specific example with the prior art. In the present example, a service channel has a rate of 256 Kbit/s.
  • the total length of the channel data is 32K bytes, where: the header 10 is 37 bytes long; the total length of the video data segment is 26.8K bytes; the total length of the audio data segment is 4.1K bytes; the header length of the auxiliary data segment is 21 bytes. There are 8 auxiliary data units, and the total length of the auxiliary data units is 1K bytes. For parts less than 32K bytes, all zeros can be filled.
  • Such a TV channel can provide video data at a rate of 212 Kbit/s, audio data at a rate of 32 Kbit/s, and synchronous data at a rate of 8 Kbit/s, which can satisfy QVGA resolution, 25 frames of H264 or AVS-M video data. transmission.
  • the prior art is encapsulated by the TS method. If 8 data units are encapsulated and transmitted in the TS packet, 10 TS packets are required, which requires a bandwidth of 1504 bytes, and the utilization rate is less than 80%.
  • the method of this patent is TS. The way to increase the utilization by 20%.

Landscapes

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

Abstract

Procédé de transfert de données d'assistance dans une diffusion multimédia vers des terminaux mobiles. Dans le cadre de la présente invention, l'adjonction d'un segment de données d'assistance (13) dans des données de canal par le réseau de desserte et le terminal mobile dans la zone de couverture ainsi que la mise en oeuvre de ces données d'assistance pour la transmission temporaire dans ledit segment incluent les opérations suivantes: transmission par le réseau de desserte des données de canal au terminal mobile via le canal de desserte sans fil; et réception par le terminal mobile des données de canal et extraction une à une des données d'assistance dans le segment (13). Cette invention devrait permettre d'améliorer l'efficacité de transmission des données d'assistance et d'appliquer ces données de manière plus fonctionnelle pour des légendes, le téléchargement de documents, la multidiffusion IP et analogues, avec une plus meilleure définition des données audio et vidéo.
PCT/CN2006/003755 2006-09-30 2006-12-30 Procédé de transfert de données d'assistance dans une diffusion multimédia mobile WO2008043212A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN2006101596582A CN1960520B (zh) 2006-09-30 2006-09-30 一种在移动多媒体广播中传递辅助数据的方法
CN200610159658.2 2006-09-30

Publications (1)

Publication Number Publication Date
WO2008043212A1 true WO2008043212A1 (fr) 2008-04-17

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PCT/CN2006/003755 WO2008043212A1 (fr) 2006-09-30 2006-12-30 Procédé de transfert de données d'assistance dans une diffusion multimédia mobile

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CN (1) CN1960520B (fr)
WO (1) WO2008043212A1 (fr)

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Publication number Priority date Publication date Assignee Title
CN101277316A (zh) * 2008-05-21 2008-10-01 中兴通讯股份有限公司 一种文件下载的交互式纠错方法和系统
CN104811749A (zh) * 2015-03-18 2015-07-29 天脉聚源(北京)传媒科技有限公司 一种多媒体数据传输方法及装置
CN112509590A (zh) * 2020-12-03 2021-03-16 合肥星空物联信息科技有限公司 一种音频传输方法和装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1287747A (zh) * 1998-10-28 2001-03-14 索尼电脑娱乐公司 用于在视频流中插入辅助数据的系统
CN1571512A (zh) * 2004-04-30 2005-01-26 清华大学 面向移动终端的多媒体广播系统及其实现方法
CN1754370A (zh) * 2003-02-26 2006-03-29 皇家飞利浦电子股份有限公司 用于广播多媒体内容的系统

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Publication number Priority date Publication date Assignee Title
CN1142657C (zh) * 1998-10-05 2004-03-17 诺基亚网络有限公司 帧控制方法和装置
CN1225883C (zh) * 2001-07-27 2005-11-02 华为技术有限公司 一种节约带宽的语音传送方法
CN1210956C (zh) * 2002-06-19 2005-07-13 华为技术有限公司 视讯会议流媒体实时接收存储方法
EP1592259B1 (fr) * 2004-04-30 2011-10-05 Panasonic Corporation Traitement de données additionnelles de séquences vidéo

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1287747A (zh) * 1998-10-28 2001-03-14 索尼电脑娱乐公司 用于在视频流中插入辅助数据的系统
CN1754370A (zh) * 2003-02-26 2006-03-29 皇家飞利浦电子股份有限公司 用于广播多媒体内容的系统
CN1571512A (zh) * 2004-04-30 2005-01-26 清华大学 面向移动终端的多媒体广播系统及其实现方法

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CN1960520A (zh) 2007-05-09
CN1960520B (zh) 2011-02-23

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