WO2008028367A1 - A method for realizing multi-audio tracks for mobile mutilmedia broadcasting system - Google Patents
A method for realizing multi-audio tracks for mobile mutilmedia broadcasting system Download PDFInfo
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- WO2008028367A1 WO2008028367A1 PCT/CN2006/003783 CN2006003783W WO2008028367A1 WO 2008028367 A1 WO2008028367 A1 WO 2008028367A1 CN 2006003783 W CN2006003783 W CN 2006003783W WO 2008028367 A1 WO2008028367 A1 WO 2008028367A1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/28—Arrangements for simultaneous broadcast of plural pieces of information
- H04H20/30—Arrangements for simultaneous broadcast of plural pieces of information by a single channel
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- 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
- H04N21/233—Processing of audio elementary streams
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- 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
- H04N21/2368—Multiplexing of audio and 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]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/81—Monomedia components thereof
- H04N21/8106—Monomedia components thereof involving special audio data, e.g. different tracks for different languages
- H04N21/8113—Monomedia components thereof involving special audio data, e.g. different tracks for different languages comprising music, e.g. song in MP3 format
Definitions
- the present invention relates to a mobile multimedia broadcast system, and more particularly to a multi-track implementation method of a mobile multimedia broadcast system.
- Mobile multimedia broadcasting is a multimedia playback technology that has emerged in recent years. Through the mobile terminal, in the case of high-speed movement, the television can be watched. The mobile terminal can receive the program list through the wireless protocol, and can select the program of interest to the user, so that the multimedia data stream can be received, and the television is watched on the mobile terminal.
- the air data transmitted by the mobile multimedia broadcasting system is divided into different channels and transmitted by the multiplexing technology, and the mobile terminal can receive relevant data, and realize normal broadcasting of the television through the player on the terminal.
- the mobile multimedia broadcast system can transmit an audio stream of one track or an audio stream of multiple tracks.
- TS Transport Stream
- MPEG Motion Picture Expert Group
- ⁇ 1 Video audio and control information is transmitted in a fixed 188-byte packet
- PID Program Identifier
- the ISMA Internet Streaming Media Alliance
- RTP Real Time Transport Protocol
- each packet in the TS mode is small and the efficiency is relatively low, and the application scope of the ISMA mode is small, and can only be used on an IP network.
- SUMMARY OF THE INVENTION The technical problem to be solved by the present invention is to provide a multi-track implementation method suitable for use in a mobile multimedia broadcast system, which can transmit audio data of one channel including one or more audio tracks.
- the present invention provides a multi-track implementation method for a mobile multimedia broadcast system, characterized in that: when transmitting a channel of audio data containing one or more audio tracks, the mobile multimedia broadcast system will The audio data is divided into an audio header and N audio units, and the audio header contains the track number of each audio unit, and then is placed for one or more data channels allocated for the channel.
- the multi-track implementation method may further have the following features: a synchronization header is also added between each audio unit (so, isolation.
- the multi-track implementation method may further have the following features: The length information of the audio unit is also included in the packet header, and is used to locate and divide each audio unit data, and the length is flexible.
- the multi-track implementation method may further have the following features:
- the timestamp information is used to indicate the time of playing.
- the multi-track implementation method described above may further have the following features:
- the mobile multimedia broadcast system transmits one full frame data at a fixed time interval, and the full frame data is fixed size.
- the first control channel and the M-1 data channels are formed, and M is fixed.
- the multi-track implementation method may further have the following features: the bandwidth of each data channel is a fixed value, and more The data channels jointly transmit data of one channel.
- Point The audio packet header also contains the unit numbers of the individual audio units, which are numbered in the order of the audio units.
- the present invention is packaged in one channel by 4 bar multiple tracks, and the audio data in one channel is divided into multiple audios.
- the unit, transmitted through one or more channels, can realize one track, two tracks or more than two tracks simultaneously transmitted in one channel, and has high transmission efficiency.
- Channel data packet encapsulation of multi-track implementation method of mobile multimedia broadcasting system of the present invention FIG. 2 is a schematic diagram of implementing two audio tracks using the multi-track implementation method of the mobile multimedia broadcast system of the present invention.
- DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A multi-track implementation method of a mobile multimedia broadcast system of the present invention will be further described below with reference to the accompanying drawings.
- the mobile multimedia broadcast system transmits one full frame of data at a fixed time interval, and the fixed time interval may be 1 second or other time values.
- the full frame data consists of M channels, which are divided into 1 control channel and M-1 data channel. The number of channels M is fixed.
- Channel 0 is a control channel for transmitting control information and program listings.
- M-1 is a data channel for transmitting channel data.
- the channel data contains: header, video data, audio data, and synchronization data.
- the data of one channel can be transmitted in one data channel or in multiple data channels.
- the audio data is divided into an audio header and N audio units, and each audio unit is isolated by a sync head to achieve error isolation.
- the audio packet header includes description information about the N audio units, including: length of each audio unit, audio track number, time stamp, and the like, wherein the length of the audio unit can be used to locate and divide each audio unit data. , can be flexibly set.
- the time stamp refers to the time of playback, and the track number is used to identify which track the audio unit belongs to.
- the audio unit can be numbered sequentially as a unit number.
- 2 is a schematic diagram of realizing two audio tracks using the multi-track implementation method of the mobile multimedia broadcast system of the present invention.
- the audio header and sync header are omitted from the figure.
- _ set the first track with 15 audio units
- the second track has 10 audio units, as shown in Figure 2
- the first track includes: audio unit 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 22, 23, 24, 25,
- the second track includes: audio units 2, 4, 6, 8, 10, 12, 14, 16, 18, 20.
- each audio unit has a sync header that divides each audio unit.
- the audio units of 2 sounds may not be arranged in exactly the above order, and the order is flexible.
- one track, two tracks or more than two tracks can be simultaneously transmitted in one or more data channels allocated by one channel.
- each data channel has a rate of 128 Kbit/s, and one channel is transmitted using two data channels, which can have a rate of 256 Kbit/s.
- the header is 122 bytes long
- the video data has 22.5K bytes
- the audio data is 8K bytes long
- the synchronous data is 1K bytes.
- all 0s can be filled.
- the audio data consists of 2 tracks, each with 32Kbit/s.
- Such a channel can satisfy the transmission of 1 QVGA resolution, 25 frames of H264 or AVS-M video data, and the transmission of 2 32Kbit/s AAC track data, which can provide users with satisfactory quality. Audio streaming of mobile radio and television programs.
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
一种移动多媒体广播系统的多音轨实现方法 技术领域 本发明涉及移动多媒体广播系统， 更具体地讲， 涉及一种移动多媒体广播 系统的多音轨实现方法。 背景技术 移动多媒体广播是近年来兴起的一种多媒体播放技术。 通过移动终端， 在高速移动的情况下， 可以观看电视。 移动终端能够通过无线协议接收到节目 单， 并可以选择自己感兴趣的节目， 从而可以接收多媒体数据流， 实现在移动 终端上收看电视。 移动多媒体广播系统发射的空中数据，被分成不同的频道，通过复用技术 传输， 移动终端可以接收相关的数据， 通过终端上的播放器， 实现电视的正常 播放。 对于同一个频道，移动多媒体广播系统可以发送 1个音轨的音频流，也可 以发送多个音轨的音频流。 现有技术中实现多音轨的方法有以下 2种： 第一， TS ( Transport Stream, 传输流）方式， TS协议是 MPEG ( Moving Picture Expert Group, 运动图像专家组） 标准中的一种， 它^1视频、 音频及控 制信息放在一个固定 188 字节大小的数据包中传送， 通过 PID ( Program Identifier , 节目编号） 字段来区分不同的音轨， 从而可以支持多音轨的播放。 第二， ISMA ( Internet Streaming Media Alliance, 互联网流媒体联盟） 方 式， ISMA规范是用 RTP ( Real Time Transport Protocol, 实时传输协议）传送 多媒体信息， 可以打开多个 RTp通道， 传送不同的音轨， 这种方式适合在 IP 网络上使用。 然而， 上述现有技术实现多音轨的方法存在如下问题： TS方式的每个包 很小， 效率比较低 , 而 ISMA方式应用范围小， 只能在 IP网络上使用。 发明内容 本发明要解决的技术问题是提供一种适合在移动多媒体广播系统使用的 多音轨实现方法， 可以发送一个频道的包含一个或多个音轨的音频数据。 为了解决上述问题，本发明提供了一种移动多媒体广播系统的多音轨实现 方法， 其特征在于： 移动多媒体广 4番系统在发送一个频道的包含一个或多个音 轨的音频数据时， 将这些音频数据分为音频包头与 N个音频单元， 音频包头中 包含各个音频单元的音轨编号， 然后将其放在为该频道所分配一个或多个数据 通道发送。 进一步地， 上述多音轨实现方法还可具有以下特点： 所述每个音频单元之 间还加入同步头 ^(故隔离。 进一步地， 上述多音轨实现方法还可具有以下特点： 所述音频包头中还包 含音频单元的长度信息， 用来定位分割每一个音频单元数据， 且该长度是可以 灵活设置的。 进一步地， 上述多音轨实现方法还可具有以下特点： 所述音频包头中还包 含时间戳信息， 用于指示播放的时间。 进一步地， 上述多音轨实现方法还可具有以下特点： 移动多媒体广播系统 在一个固定时间间隔发送 1个全帧数据， 该全帧数据由固定大小的 1个控制通 道和 M-1个所述的数据通道组成， M是固定的。 进一步地， 上述多音轨实现方法还可具有以下特点： 所述每个数据通道的 带宽为固定值， 多个数据通道共同传送 1个频道的数据。 进一步地， 上述多音轨实现方法还可具有以下特点： 音频包头中还包含各 个音频单元的单元编号， 是按音频单元顺序编号的。 本发明通过 4巴多个音轨封装在一个频道中，并将一个频道中的音频数据 分为多个音频单元， 通过一个或多个通道进行传输， 可以实现 1个音轨、 2个 音轨或 2个以上的音轨同时在一个频道内传送， 且具有较高的传输效率。 附图说明 图 1 是本发明移动多媒体广播系统的多音轨实现方法的频道数据包封装 结构示意图; 图 2是使用本发明移动多媒体广播系统的多音轨实现方法实现 2个音轨的 示意图。 具体实施方式 下面将结合附图对本发明移动多媒体广播系统的多音轨实现方法作进一 步的描迷。 移动多媒体广播系统在一个固定时间间隔发送 1个全帧数据，固定时间间 隔可以是 1秒， 也可以是其他时间值。 全帧数据由 M个通道组成， 分为 1个控 制通道和 M― 1个数据通道。 通道数 M是固定的。 其中通道 0是控制通道， 用于传输控制信息及节目列表。 通道 1到通道BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile multimedia broadcast system, and more particularly to a multi-track implementation method of a mobile multimedia broadcast system. BACKGROUND OF THE INVENTION Mobile multimedia broadcasting is a multimedia playback technology that has emerged in recent years. Through the mobile terminal, in the case of high-speed movement, the television can be watched. The mobile terminal can receive the program list through the wireless protocol, and can select the program of interest to the user, so that the multimedia data stream can be received, and the television is watched on the mobile terminal. The air data transmitted by the mobile multimedia broadcasting system is divided into different channels and transmitted by the multiplexing technology, and the mobile terminal can receive relevant data, and realize normal broadcasting of the television through the player on the terminal. For the same channel, the mobile multimedia broadcast system can transmit an audio stream of one track or an audio stream of multiple tracks. There are two methods for implementing multi-track in the prior art: First, TS (Transport Stream) mode, TS protocol is one of the MPEG (Moving Picture Expert Group) standards. ^ 1 Video, audio and control information is transmitted in a fixed 188-byte packet, and the PID (Program Identifier) field is used to distinguish different tracks, so that multi-track playback can be supported. Second, the ISMA (Internet Streaming Media Alliance) mode, the ISMA specification uses RTP (Real Time Transport Protocol) to transmit multimedia information, which can open multiple RT p channels and transmit different audio tracks. This method is suitable for use on an IP network. However, the above-mentioned prior art method for implementing multiple audio tracks has the following problems: Each packet in the TS mode is small and the efficiency is relatively low, and the application scope of the ISMA mode is small, and can only be used on an IP network. SUMMARY OF THE INVENTION The technical problem to be solved by the present invention is to provide a multi-track implementation method suitable for use in a mobile multimedia broadcast system, which can transmit audio data of one channel including one or more audio tracks. In order to solve the above problems, the present invention provides a multi-track implementation method for a mobile multimedia broadcast system, characterized in that: when transmitting a channel of audio data containing one or more audio tracks, the mobile multimedia broadcast system will The audio data is divided into an audio header and N audio units, and the audio header contains the track number of each audio unit, and then is placed for one or more data channels allocated for the channel. Further, the multi-track implementation method may further have the following features: a synchronization header is also added between each audio unit (so, isolation. Further, the multi-track implementation method may further have the following features: The length information of the audio unit is also included in the packet header, and is used to locate and divide each audio unit data, and the length is flexible. Further, the multi-track implementation method may further have the following features: The timestamp information is used to indicate the time of playing. Further, the multi-track implementation method described above may further have the following features: The mobile multimedia broadcast system transmits one full frame data at a fixed time interval, and the full frame data is fixed size. The first control channel and the M-1 data channels are formed, and M is fixed. Further, the multi-track implementation method may further have the following features: the bandwidth of each data channel is a fixed value, and more The data channels jointly transmit data of one channel. Further, the above multi-track implementation method may further have the following features Point: The audio packet header also contains the unit numbers of the individual audio units, which are numbered in the order of the audio units. The present invention is packaged in one channel by 4 bar multiple tracks, and the audio data in one channel is divided into multiple audios. The unit, transmitted through one or more channels, can realize one track, two tracks or more than two tracks simultaneously transmitted in one channel, and has high transmission efficiency. Channel data packet encapsulation of multi-track implementation method of mobile multimedia broadcasting system of the present invention FIG. 2 is a schematic diagram of implementing two audio tracks using the multi-track implementation method of the mobile multimedia broadcast system of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A multi-track implementation method of a mobile multimedia broadcast system of the present invention will be further described below with reference to the accompanying drawings. The mobile multimedia broadcast system transmits one full frame of data at a fixed time interval, and the fixed time interval may be 1 second or other time values. The full frame data consists of M channels, which are divided into 1 control channel and M-1 data channel. The number of channels M is fixed. Channel 0 is a control channel for transmitting control information and program listings. Channel 1 to channel
M-1为数据通道， 用于传输频道数据。 如图 1所示， 频道数据包含： 包头、 视频数据、 音频数据和同步数据。 1 个频道的数据可以放在 1个数据通道中传送， 也可以在多个数据通道中传送。 音频数据被分为音频包头与 N个音频单元， 每个音频单元之间用同步头 4故隔离， 以达到错误隔离的功能。 音频包头中包含对 N个音频单元的描述信息， 包括： 每个音频单元的长 度、 音频单元的音轨编号、 时戳等信息， 其中， 音频单元的长度可以用来定位 分割每一个音频单元数据， 是可以灵活设置的。 时戳是指播放的时间， 音轨编 号是用来标识这个音频单元属于哪一个音轨。 此外， 还可以对音频单元顺序编 号， 作为单元编号。 图 2是使用本发明移动多媒体广播系统的多音轨实现方法实现 2个音轨的 示意图。 图中略去了音频包头和同步头。 個_设第一个音轨有 15 个音频单元， 第 2个音轨有 10个音频单元， 如图 2所示， 第 1个音轨包括： 音频单元 1、 3、 5、 7、 9、 11、 13、 15、 17、 19、 21、 22、 23、 24、 25 , 第 2个音轨包括： 音 频单元 2、 4、 6、 8、 10、 12、 14、 16、 18、 20。 图中， 每个音频单元之间有同 步头分割了各个音频单元。 M-1 is a data channel for transmitting channel data. As shown in Figure 1, the channel data contains: header, video data, audio data, and synchronization data. The data of one channel can be transmitted in one data channel or in multiple data channels. The audio data is divided into an audio header and N audio units, and each audio unit is isolated by a sync head to achieve error isolation. The audio packet header includes description information about the N audio units, including: length of each audio unit, audio track number, time stamp, and the like, wherein the length of the audio unit can be used to locate and divide each audio unit data. , can be flexibly set. The time stamp refers to the time of playback, and the track number is used to identify which track the audio unit belongs to. In addition, the audio unit can be numbered sequentially as a unit number. 2 is a schematic diagram of realizing two audio tracks using the multi-track implementation method of the mobile multimedia broadcast system of the present invention. The audio header and sync header are omitted from the figure. _ set the first track with 15 audio units, the second track has 10 audio units, as shown in Figure 2, the first track includes: audio unit 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 22, 23, 24, 25, the second track includes: audio units 2, 4, 6, 8, 10, 12, 14, 16, 18, 20. In the figure, each audio unit has a sync header that divides each audio unit.
2个音執的音频单元可以不完全按照上述次序排列，其次序是可以灵活调 整的。 按照上述原则， 可以实现 1个音轨、 2个音轨或 2个以上的音轨同时在一 个频道所分配的一个或多个数据通道内传送。 例如， 在 1个频道包含 2个音轨的情况下， 每个数据通道有 128Kbit/s的 速率， 1个频道使用 2个数据通道传输， 可以有 256Kbit/s的速率。 其中： 包头长 122字节，视频数据共有 22.5K字节， 音频数据长 8K字节， 同步数据 1K字节， 对于不足 32K字节的部分， 可以填充全 0。 音频数据包括 2个音轨， 每个音轨有 32Kbit/s。 和 TS方式相比大大提高了传送的效率。 这样一个频道， 可以满足 1个 QVGA分辨率、 25帧的 H264或 AVS-M的 视频数据的传输， 和 2个 32Kbit/s的 AAC音轨数据的传输， 可以给用户提供 具有相当满意的高质量音频流的移动广播电视节目。 The audio units of 2 sounds may not be arranged in exactly the above order, and the order is flexible. Whole. According to the above principle, one track, two tracks or more than two tracks can be simultaneously transmitted in one or more data channels allocated by one channel. For example, in the case where one channel contains two tracks, each data channel has a rate of 128 Kbit/s, and one channel is transmitted using two data channels, which can have a rate of 256 Kbit/s. Among them: The header is 122 bytes long, the video data has 22.5K bytes, the audio data is 8K bytes long, and the synchronous data is 1K bytes. For parts less than 32K bytes, all 0s can be filled. The audio data consists of 2 tracks, each with 32Kbit/s. Compared with the TS method, the transmission efficiency is greatly improved. Such a channel can satisfy the transmission of 1 QVGA resolution, 25 frames of H264 or AVS-M video data, and the transmission of 2 32Kbit/s AAC track data, which can provide users with satisfactory quality. Audio streaming of mobile radio and television programs.
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| CN200610111816.7 | 2006-08-23 | ||
| CNB2006101118167A CN100531398C (en) | 2006-08-23 | 2006-08-23 | Method for realizing multiple audio tracks in mobile multimedia broadcast system |
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| WO2008028367A1 true WO2008028367A1 (en) | 2008-03-13 |
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| CN102821076B (en) | 2012-06-29 | 2014-12-24 | 天地融科技股份有限公司 | Audio communication modulation way self-adaptive method, system, device and electronic sign tool |
| CN112000308B (en) * | 2020-09-10 | 2023-04-18 | 成都拟合未来科技有限公司 | Double-track audio playing control method, system, terminal and medium |
| CN113542688B (en) * | 2021-07-14 | 2023-03-28 | 杭州海康威视数字技术股份有限公司 | Audio and video monitoring method, device, equipment, storage medium and system |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN1960498A (en) | 2007-05-09 |
| CN100531398C (en) | 2009-08-19 |
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