CN100518330C - Method of binding multiple channels in mobile multimedia broadcast - Google Patents
Method of binding multiple channels in mobile multimedia broadcast Download PDFInfo
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- CN100518330C CN100518330C CNB200610127618XA CN200610127618A CN100518330C CN 100518330 C CN100518330 C CN 100518330C CN B200610127618X A CNB200610127618X A CN B200610127618XA CN 200610127618 A CN200610127618 A CN 200610127618A CN 100518330 C CN100518330 C CN 100518330C
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Abstract
The method comprises:using TDM (time division multiplexing) way to divide the multimedia broadcast into multi channels in which there are a control channel and at least one data channel; allocating one or more data channel for the each channel of multimedia broadcast; according to the amount of data channel allocated for each channel, dividing the data of the channel into several portions with same amount; each data portion are packaged into each data channel allocated for the channel to transmit, and the data channel number forming the channel is recorded in the control channel or the packet header of channel data to transmit; after the terminal receives the data, according to the sequence of data channel, the terminal combines the received data, and after recovering the data, the terminal plays the data.
Description
Technical field
The invention belongs to Mobile Multimedia Broadcasting or technical field of mobile TV, relate to a kind of method that realizes a plurality of passage bindings of Mobile Multimedia Broadcasting.
Background technology
Mobile Multimedia Broadcasting is a kind of Play Technique for Multimedia of rising in recent years.By hand-held terminal, under the situation of high-speed mobile, can watch TV.Terminal receives programme by wireless protocols, and can select the channel of oneself having the right to watch, thereby can accept to select the multi-medium data of channel, is implemented in and sees TV on the portable terminal.
Multimedia broadcasting provides a plurality of aerial passages, and the bandwidth of each passage is identical.The aerial data of multimedia broadcasting emission are divided into different channels, transmit respectively by multiplex technique, and terminal can receive relevant data, by the player on the terminal, realize the normal play of TV.For same channel, need to send video data, voice data.
The speed of the program that terminal is watched can be different, thereby can satisfy different user group's requirement.The terminal that has can receive the program of run-of-the-mill, and the user who has can receive high-quality program.For the higher program of quality requirement, require the data of 1 channel in a plurality of passages, to launch, realize the passage binding, and the port number of binding requires and can change flexibly, to satisfy requirements of different users.
Binding multiple channels technology under a kind of frequency multiplexing technique is arranged in the prior art, can give the different frequency bandwidth channel of different quality requirement, transmit different channels with different frequencies, but this method be very dumb, can not change the bandwidth of each channel at any time, bandwidth availability ratio is lower.
Summary of the invention
The object of the present invention is to provide a kind of method that in mobile broadcast system, realizes binding multiple channels, can be at the channel of different quality requirement, bundle needed passage flexibly, improve the sharp frequency of bandwidth, allow terminal can receive the channel of different quality, thereby realize that different channel can satisfy requirements of different users.
Technical scheme of the present invention is as follows:
A kind of method of binding multiple channels in mobile multimedia broadcast may further comprise the steps:
(1) with time division multiplexing mode multimedia broadcasting is divided into a plurality of passages, wherein has a control channel and at least one data channel;
(2), be used to transmit the data of corresponding channel for each channel of multimedia broadcasting distributes one or more data channel respectively;
(3), all data of channel are cut into and the identical umber of described data channel number the corresponding data channel that is assigned with of one piece of data according to distributing to the data channel quantity of each channel;
Each piece of data that (4) will cut into is packaged in respectively in each data channel of distributing to described channel according to corresponding relation to be transmitted, and notes the channel number order of the described channel data of transmission, and control information sends with channel data as passage.
Said method further can comprise:
(5) after terminal receives data, the data that receive are made up, play after the restore data according to the channel number order of the data channel of this channel of composition that writes down in the passage control information.
In the said method, data packets for transmission is drawn together header data, video data, speech data, synchrodata in a channel, and wherein said video data comprises a plurality of independently video units that are cut into; Described voice data comprises a plurality of independently audio units that are cut into.
Described passage control information can be recorded in the control channel to be transmitted, or is recorded in packet header of channel data and transmits.
The cutting of the described data of step (3), wherein the cutting to video data is to be that unit carries out with the video unit, is that unit carries out with the audio unit to the cutting of voice data.
Be packaged with control information and program list information in the described control channel.
The above-mentioned data channel of distributing to a channel can be any in the total data passage of dividing.
Above-mentioned video data and voice data can be cut in a plurality of data channel of forming this channel.
The present invention can bundle the needed passage of each channel flexibly, thereby can support different channels to have different bandwidth.The present invention has finished the binding multiple channels function at the media protocol layer, does not need the multiplex layer agreement to participate in, and compares the bundle feature that the multiplex layer agreement realizes, method of the present invention is more flexible, bandwidth availability ratio is also higher, to supporting the variable rate video encryption algorithm future, has more advantage.
Description of drawings
Fig. 1 is the schematic diagram that channel data transmits in passage.
Fig. 2 is that the present invention realizes the schematic diagram that multichannel is multiplexing.
Embodiment
Below in conjunction with drawings and the specific embodiments, method of the present invention is described in further detail.
The present invention is divided into a plurality of passages with time division multiplexing mode with multimedia broadcasting, wherein has a control channel and at least one data channel.Mobile Multimedia Broadcasting can send 1 full frame structured data in a Fixed Time Interval, Fixed Time Interval can be 1 second, also can be the other times value.
Full frame is made up of a plurality of passages, and port number is fixed.Wherein the 0th passage is special, is control channel, is used for transmitting control information and the rendition list.Rest channels is a data channel, is used for Data transmission.
The data of 1 channel are made up of packet header, video data, voice data, synchrodata, and its middle wrapping head comprises control informations such as packet header control field.The data of 1 channel can be placed in 1 data passage and transmit, and also can transmit in a plurality of data channel.In the embodiment shown in fig. 1, the data of a channel are placed in passage 1, passage 2 and the passage 3 and transmit.
The data channel of distributing to a channel can be any in the total data passage of dividing.And the numbering of binding channels can be discontinuous, transmits such as also being placed on the data of a channel in passage 1, passage 5 and the passage 7.
Video data is made up of video packet header and a plurality of independently video units of being cut into, and voice data is made up of audio frequency packet header and a plurality of independently audio units of being cut into.
With all data of this channel, cut into the umber identical with the port number of distributing to this channel.As shown in Figure 2, the data of this channel are placed in 3 passages to be transmitted, and then the data of this channel is cut into 3 parts.The video data of supposing this channel comprises N video unit, can be cut into following 3 parts to the data of this channel:
The 1st piece of data be by packet header, video packet header, video unit 1, video unit 2 ..., video unit L forms;
The 2nd piece of data be by video unit L+1 ..., video unit M forms;
The 3rd piece of data be by video unit M+1 ..., video unit N, voice data, synchrodata form.
Less than N, frame frequency is less than N less than M, M for above-mentioned L.
Then, this 3 piece of data just can transmit in 3 passages respectively.
Above-mentioned method is an example, in fact, because voice data, synchrodata also might be very big, the result of cutting also may be: voice data is cut in the 2nd and the 3rd passage and transmits, and video data transmits in the 1st and the 2nd passage, and synchrodata transmits in the 3rd passage.That is to say that video data and voice data can be cut in a plurality of data channel of forming this channel.
Cutting to video data and voice data is that unit carries out with video unit, audio unit always.1 video unit can not be crossed over 2 passages, and 1 audio unit can not be crossed over 2 passages.
After the data cutting is finished, in the control information that the channel number journal of above-mentioned 3 passages is transmitted in passage 0, perhaps be recorded in the packet header of this channel, then control information and program list information are packaged in above-mentioned passage 0 transmission, 3 piece of data that cut into are placed on 3 data channel transfer distributing to this channel respectively, the corresponding data passage of a piece of data.
Like this, terminal is utilized the control information of control channel or the numbering that packet header obtains corresponding a plurality of passages after receiving data, and takes out data, press the passage serial number to the data combination after, just obtain the total data of this channel, thus the realization normal play.
It more than is the execution mode that channel data transmits in 3 passages.Adopt this method, the port number of binding is variable, can set arbitrarily, for example can also realize the binding of 6 even 12 passages, and is very flexible.
Below by an example the present invention is described further.In this example, the speed of 1 total 384Kbit/s of channel takies 3 passages altogether, and the speed of each passage is 128Kbit/s, and wherein video rate is 340Kbit/s, and audio rate is 32Kbit/s, and synchrodata is 8Kbit/s, and the frame frequency of channel is 25 frames.
This channel is cut into 3 parts, per 1 part is 128Kbit/s, video data is cut in 3 passages and transmits, the 1st passage comprises 9 video units, the 2nd passage comprises 11 video units, and the 3rd passage comprises 7 video units, and 25 frames are cut into 27 video units, wherein the 9th frame, the 19th frame all are made up of 2 video units, and all the other each frames all are made up of a video unit.
Such television channel can satisfy the transmission of the video data of the H264 of 1 QVGA resolution, 25 frames or AVS-M, and the mobile broadcast television program of the high-quality audio stream of suitable satisfaction can be provided to the user.
The invention belongs to the binding multiple channels technology under a kind of time-division multiplex technology, be adapted at using in the mobile media broadcasting network.Adopt this method, the port number of binding is variable, can set arbitrarily, such as realizing 6 passage bindings, to realize the channel of 768Kbit/s, can bring higher-quality video, audio frequency.
Claims (10)
1, a kind of method of binding multiple channels in mobile multimedia broadcast said method comprising the steps of:
(1) with time division multiplexing mode multimedia broadcasting is divided into a plurality of passages, wherein has a control channel and at least one data channel;
(2), be used to transmit the data of corresponding channel for each channel of multimedia broadcasting distributes one or more data channel respectively;
(3), all data of channel are cut into and the identical umber of described data channel number the corresponding data channel that is assigned with of one piece of data according to distributing to the data channel quantity of each channel;
Each piece of data that (4) will cut into is packaged in respectively in each data channel of distributing to described channel according to corresponding relation to be transmitted, and notes the channel number order of the described channel data of transmission, and control information sends with channel data as passage.
2, the method for claim 1 is characterized in that, further comprises:
(5) after terminal receives data, the data that receive are made up, play after the restore data according to the channel number order of the data channel of this channel of composition that writes down in the passage control information.
3, method as claimed in claim 1 or 2 is characterized in that, described in a channel data packets for transmission draw together packet header, video data, speech data, synchrodata.
4, method as claimed in claim 1 or 2 is characterized in that, described passage control information is transmitted in control channel.
5, method as claimed in claim 3 is characterized in that, described passage control information is recorded in the packet header of channel data.
6, method as claimed in claim 3 is characterized in that, described video data comprises a plurality of independently video units; Voice data comprises a plurality of independently audio units.
7, method as claimed in claim 6 is characterized in that, the cutting of the described data of step (3), and wherein the cutting to video data is that unit carries out with the video unit, is that unit carries out with the audio unit to the cutting of voice data.
8, method as claimed in claim 7 is characterized in that, described video data and voice data can be cut in a plurality of data channel of forming this channel.
9, the method for claim 1 is characterized in that, is packaged with control information and program list information in the described control channel.
10, the method for claim 1 is characterized in that, the data channel of distributing to a channel is any in the total data passage of dividing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610127618XA CN100518330C (en) | 2006-08-31 | 2006-08-31 | Method of binding multiple channels in mobile multimedia broadcast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610127618XA CN100518330C (en) | 2006-08-31 | 2006-08-31 | Method of binding multiple channels in mobile multimedia broadcast |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1960500A CN1960500A (en) | 2007-05-09 |
| CN100518330C true CN100518330C (en) | 2009-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200610127618XA Expired - Fee Related CN100518330C (en) | 2006-08-31 | 2006-08-31 | Method of binding multiple channels in mobile multimedia broadcast |
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| Country | Link |
|---|---|
| CN (1) | CN100518330C (en) |
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- 2006-08-31 CN CNB200610127618XA patent/CN100518330C/en not_active Expired - Fee Related
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| CN1960500A (en) | 2007-05-09 |
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Granted publication date: 20090722 Termination date: 20200831 |