CN1960228B - Method for multiplexing aerial channels of mobile multimedia broadcast - Google Patents
Method for multiplexing aerial channels of mobile multimedia broadcast Download PDFInfo
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- CN1960228B CN1960228B CN2006101099043A CN200610109904A CN1960228B CN 1960228 B CN1960228 B CN 1960228B CN 2006101099043 A CN2006101099043 A CN 2006101099043A CN 200610109904 A CN200610109904 A CN 200610109904A CN 1960228 B CN1960228 B CN 1960228B
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Abstract
The mobile multi-media broadcast system emits a full frame data in a solid interval. The full frame data consists of N channels with solid bandwidth, including control and data channels. A channel data may be transferred in one or more data channels depending on the needed bandwidth. The channel data consists of pack head, video data, voice data and synchronization data. Among them, the pack head info includes the data lengths of the video data, the audio data and the synchronization data. The lengths of these data can be flexibly set on demand. Via multiplexing more data channels in air, this invention realizes various data transfer multiplexing in the wireless broadcast system, thus utilizes the frequency spectrum resource in air effectively.
Description
Technical field
The present invention relates to Mobile Multimedia Broadcasting/multicast field, particularly a kind of multiplexing method of aerial passage of Mobile Multimedia Broadcasting/multicast.
Background technology
Mobile Multimedia Broadcasting is a kind of Play Technique for Multimedia of rising in recent years.The user under the situation of high-speed mobile, can watch multi-medium broadcast/group broadcast programs such as TV by using portable terminal.Portable terminal can receive programme by wireless protocols, and can select own programs of interest, thus can receiving multimedia data stream, be implemented in multi-medium broadcast/group broadcast program such as teleview on the portable terminal.
The aerial data of mobile multimedia broadcast system emission are divided into different channels, and the data of each channel comprise again: three types of video, audio frequency and synchrodatas.Channel data transmits by multiplex technique, after portable terminal receives relevant data, by the player on the terminal, realizes the normal play of multi-medium broadcast/group broadcast programs such as TV.
The multiplex technique of the aerial passage of multimedia broadcasting of the prior art mainly contains 2 kinds:
One, frequency division multiplexing becomes a plurality of frequency ranges to frequency partition, sends video, audio frequency and synchrodata with different frequency ranges, thereby realizes the multiplexing of aerial passage.
Two, time division multiplexing is divided into different time slots to 1 data passage, sends video, audio frequency and synchrodata with different time slots, thereby realizes the multiplexing of aerial passage.
Yet, existing frequency division multiplexing, time-division multiplex technology have been fixed the bandwidth of video, voice data, flexibility is relatively poor, can not regulate the bandwidth of video, voice data at any time, can not only send a kind of in audio frequency, video or the synchrodata, also can't regulate the bandwidth of a certain data at any time, can't realize business flexibly, can not make full use of aerial radio spectrum resources at any time.
Summary of the invention
The technical problem to be solved in the present invention is, overcomes the deficiency of the multiplex technique of the aerial passage of multimedia broadcasting in the prior art, and a kind of multiplexing method of the aerial passage of Mobile Multimedia Broadcasting that can adjust flexibly the bandwidth of video, voice data is provided.
To achieve these goals, the invention provides the multiplexing method of the aerial passage of a kind of Mobile Multimedia Broadcasting, it is characterized in that, mobile multimedia broadcast system sends 1 full frames of data at a Fixed Time Interval, wherein full frames of data is made up of N passage of fixed-bandwidth, comprises control channel and data channel; According to required bandwidth, a channel data can be placed in one or more data channel and transmit.
Further, above-mentioned multiplexing method also can have following characteristics: comprise 1 control channel and N-1 data passage in the described N passage.
Further, above-mentioned multiplexing method also can have following characteristics: described passage 0 is control channel, and described passage 1～N-1 is a data channel.
Further, above-mentioned multiplexing method also can have following characteristics: described control channel is used for control information transmission, the rendition list and system clock.
Further, above-mentioned multiplexing method also can have following characteristics: described channel data comprises packet header, video data, speech data and synchrodata, wherein, the length that has comprised video data, voice data and synchrodata in the header packet information, the big I of these data are provided with as required flexibly.
Further, above-mentioned multiplexing method also can have following characteristics: can comprise any one or its combination in any in video data, speech data, the synchrodata in the described data passage.
The present invention has realized the several data multiplexing transmission by multiplexing aerial a plurality of data channel in radio broadcasting/multi-cast system, can effectively utilize aerial frequency spectrum resource, and has realized the function of control information synchronous transmission, clock synchronization.
Description of drawings
Fig. 1 is the full frame structural representation of aerial passage of the multiplexing method of the aerial passage of Mobile Multimedia Broadcasting of the present invention;
Fig. 2 is the control channel frame structure schematic diagram of the multiplexing method of the aerial passage of Mobile Multimedia Broadcasting of the present invention;
Fig. 3 is the channel data frame structure schematic diagram of the multiplexing method of the aerial passage of Mobile Multimedia Broadcasting of the present invention;
Fig. 4 is to use the multiplexing method of the aerial passage of Mobile Multimedia Broadcasting of the present invention that 1 channel is encapsulated in 2 schematic diagrames in the data passage.
Embodiment
Be further described below in conjunction with the multiplexing method of accompanying drawing the aerial passage of Mobile Multimedia Broadcasting of the present invention.
Fig. 1 is the full frame structural representation of aerial passage of the multiplexing method of the aerial passage of Mobile Multimedia Broadcasting of the present invention.
As shown in Figure 1, mobile multimedia broadcast system sends 1 full frames of data at a Fixed Time Interval, and Fixed Time Interval can be 1 second, also can be At All Other Times at interval.Full frames of data is made up of N passage, and an aerial N passage is a fixed size.Port number N can be 40, also can be other numerical value.
Passage 0 is a control channel, and passage 1 is a data channel to passage N-1, is used for transmission of video, audio frequency and synchrodata.
Fig. 2 is the control channel frame structure schematic diagram of the multiplexing method of the aerial passage of Mobile Multimedia Broadcasting of the present invention;
As shown in Figure 2, passage 0 is a control channel, is used for control information transmission and the rendition list etc.In addition, passage 0 all right transmission system clock is to guarantee that each terminal can receive clock accurately in the mobile media broadcasting network.
Fig. 3 is the channel data frame structure schematic diagram of the multiplexing method of the aerial passage of Mobile Multimedia Broadcasting of the present invention.
As shown in Figure 3, the data of each channel are made up of packet header, video data, voice data and synchrodata.Packet header comprises channel data and transmits necessary control information.Header packet information has comprised the length of video data, voice data and synchrodata, and the length of every kind of data all can be provided with as required flexibly, is adjustable.The size of fixed video data, voice data and synchrodata does not make multiplex mode of the present invention very flexible.
Can include only in the middle of video data, speech data, the synchrodata any one in passage, or comprise wherein any two kinds, or comprise whole three kinds of data.
Channel data is placed in the data channel and transmits.1 channel can be placed in 1 data passage and transmit, and also can be placed in a plurality of data channel and transmit.
Fig. 4 is to use the multiplexing method of the aerial passage of Mobile Multimedia Broadcasting of the present invention that 1 channel is encapsulated in 2 schematic diagrames in the data passage.As shown in Figure 4, channel data transmits in passage 1 and passage 2.
Below by an example the present invention is described further.
For example, each data channel of full frames of data has the speed of 128Kbit/s, and passage 0 has comprised clock synchronization, electronic program list and other control informations, is used for guaranteeing that user's channel switches the clock synchronization function.
Use passage 1 and passage 2 to transmit 1 channel, the data channel of 2 128K bit rates, the bandwidth of total 256K bit, this channel data comprises: long 122 bytes in packet header, the long 26.3K byte of video data, the long 4.2K byte of voice data, the long 1K byte of synchrodata, for the part of not enough 32K byte, can fill complete 0.
Such television channel, the video data that is higher than 208Kbit/s speed can be provided, the synchrodata of the voice data of about 32Kbit/s speed and 8Kbit/s speed, can satisfy the transmission of the video data of the H264 of QVGA resolution, 25 frames or AVS-M, the mobile broadcast television program of suitable satisfactory quality can be provided to the user.
Claims (3)
1. the multiplexing method of the aerial passage of Mobile Multimedia Broadcasting, it is characterized in that, mobile multimedia broadcast system sends 1 full frames of data at a Fixed Time Interval, wherein full frames of data is made up of N passage of fixed-bandwidth, comprises 1 control channel and N-1 data passage in the described N passage; Described control channel is used for control information transmission, the rendition list and system clock; According to required bandwidth, a channel data is placed in one or more data channel and transmits; Described channel data comprises packet header, video data, speech data and synchrodata, wherein, has comprised the length of video data, voice data and synchrodata in the header packet information, and the size of these data is provided with as required flexibly.
2. the multiplexing method of the aerial passage of Mobile Multimedia Broadcasting as claimed in claim 1 is characterized in that, described passage 0 is a control channel, and described passage 1～N-1 is a data channel.
3. the multiplexing method of the aerial passage of Mobile Multimedia Broadcasting as claimed in claim 1 is characterized in that, comprises any one or its combination in any in video data, speech data, the synchrodata in the described data passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101099043A CN1960228B (en) | 2006-08-22 | 2006-08-22 | Method for multiplexing aerial channels of mobile multimedia broadcast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101099043A CN1960228B (en) | 2006-08-22 | 2006-08-22 | Method for multiplexing aerial channels of mobile multimedia broadcast |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1960228A CN1960228A (en) | 2007-05-09 |
| CN1960228B true CN1960228B (en) | 2011-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2006101099043A Expired - Fee Related CN1960228B (en) | 2006-08-22 | 2006-08-22 | Method for multiplexing aerial channels of mobile multimedia broadcast |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101335912B (en) * | 2007-06-27 | 2013-04-10 | 中兴通讯股份有限公司 | Mixed networking and test method for audio service and multimedia broadcast/multicast service |
| CN112218115B (en) * | 2020-09-25 | 2022-07-29 | 深圳市捷视飞通科技股份有限公司 | Control method and device for streaming media audio and video synchronization and computer equipment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1758767A (en) * | 2004-10-06 | 2006-04-12 | 三星电子株式会社 | In digital audio broadcast system, provide and receiver, video service method and equipment |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1758767A (en) * | 2004-10-06 | 2006-04-12 | 三星电子株式会社 | In digital audio broadcast system, provide and receiver, video service method and equipment |
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| CN1960228A (en) | 2007-05-09 |
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Granted publication date: 20111130 Termination date: 20170822 |