CN104486637B - A kind of method of single ASI transmission multichannels TS streams - Google Patents
A kind of method of single ASI transmission multichannels TS streams Download PDFInfo
- Publication number
- CN104486637B CN104486637B CN201410833752.6A CN201410833752A CN104486637B CN 104486637 B CN104486637 B CN 104486637B CN 201410833752 A CN201410833752 A CN 201410833752A CN 104486637 B CN104486637 B CN 104486637B
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- Prior art keywords
- streams
- channel number
- asi
- bag
- empty bag
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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
- H04N21/23608—Remultiplexing multiplex streams, e.g. involving modifying time stamps or remapping the packet identifiers
-
- 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
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
Abstract
The present invention relates to a kind of method of single ASI transmission multichannels TS streams, sent by the way that the TS flow datas timesharing circulation in multiple sending modules is passed sequentially through into ASI, and mark channel number in sky bag, then each road TS data are recovered according to channel number in receiving terminal, so as to reach the effect that multichannel TS streams are transmitted in single ASI interfaces.Interface is simplified, the area of board is effectively reduced.Cost has been saved, the utilization rate of passage is improved.And this method is applied to be widely applied and use.
Description
Technical field
The present invention relates to the field of data transmission of TS streams, and in particular to a kind of method of single ASI transmission multichannels TS streams.
Background technology
It is more wired in order to provide a user in the repeater system and VOD VOD systems of satellite-cable digital TV
Digital television program and the program request demand for meeting more users, are required for QAM modulation device can be while handling to multi-channel data
QAM modulation.So needing the TS of multichannel to flow input.Generally in the transmission that TS flows, single ASI only transmits single channel TS streams.When me
When needing multiple TS stream input, then need multiple ASI interfaces, so need to account for more spaces on board.
The content of the invention
It is an object of the invention to overcome shortcoming present in above-mentioned prior art, there is provided a kind of single ASI transmission multichannels TS
The method of stream, with ASI interfaces are reduced, reduces the advantage of the area of board.
To achieve the above object, the present invention uses following technical scheme：Comprise the following steps：
1) multiple data transmission blocks are set in data sending terminal, all empty bag in ASI sendaisles is filtered out first, after
The single TS bags of each multichannel TS streams are cycled through successively from the ASI interfaces being connected with data transmission blocks, when a certain circuit-switched data
When being not ready a complete TS bag, then insert empty bag and replace；
2) channel number that road TS flows is marked in transmission is per the streams of TS all the way；
3) in data receiver, first etc. receive an empty bag, and the channel number of the packet making is extracted in being wrapped from sky, after
The TS bags received are stored in receiving module corresponding with channel number by channel number, each receiving module is circulated takes turns successively
Stream receives each TS bag, recovers multichannel TS streams；When receiving empty bag, re-synchronization channel number, until having received all TS
Bag.
Described step 2) in the modes of channel number of mark TS streams be：The empty bag the 4th inserted in per the streams of TS all the way
Current channel number is marked in byte.
Described step 3) in extract sending module from empty bag the method for channel number be to extract sky the 4th word of bag
Section, and using the value of this byte as channel number.
The present invention has following beneficial effect：Compare prior art, is circulated when the present invention is by by multichannel TS flow points
The data in modules are sent successively, and mark channel number in sky bag, are then recovered respectively according to channel number in receiving terminal
Road TS data, so as to reach the effect that multichannel TS streams are transmitted in single ASI interfaces.Interface is simplified, board is effectively reduced
Area.Cost has been saved, the utilization rate of passage is improved.And this method is applied to be widely applied and use.
Brief description of the drawings
Fig. 1 is schematic diagram of the present invention.
Embodiment
Below in conjunction with the accompanying drawings, the present invention is described in further detail.
Referring to Fig. 1, the present invention comprises the following steps：
1) multiple data transmission blocks are set in data sending terminal, all empty bag in ASI sendaisles is filtered out first, after
The single TS bags of each multichannel TS streams are cycled through successively from the ASI interfaces being connected with data transmission blocks, when a certain circuit-switched data
When being not ready a complete TS bag, then insert empty bag and replace；
2) channel number that road TS flows is marked in transmission is per the streams of TS all the way；Step 2) the middle channel number for marking TS to flow
Mode is：Current channel number is marked in the 4th byte of empty bag inserted in per the streams of TS all the way；
3) in data receiver, first etc. receive an empty bag, and the channel number of the packet making is extracted in being wrapped from sky, after
The TS bags received are stored in receiving module corresponding with channel number by channel number, each receiving module is circulated takes turns successively
Stream receives each TS bag, recovers multichannel TS streams；When receiving empty bag, re-synchronization channel number, until finishing receiving all
TS bags；Step 3) in extract sending module from empty bag the method for channel number be to extract sky to wrap nybble, and with this word
The value of section is channel number.
The present invention the course of work be：
In data sending terminal, receive and come from 4 road TS data, filter out empty bag data therein, be then stored to respectively respective
In FIFO.Then from the FIFO of each passage, a bag transmission is taken successively.When the number in certain FIFO all the way less than a bag
According to when, then insert empty bag data, and in the 4th byte of sky bag, there is shown the channel number of current channel.For example take turns to
When one sending module sends data, the module is not yet ready for a complete TS bag, then the module sends an empty bag,
4th byte of sky bag is 0x01.Similarly, sending module 2, during 3,4 transmission sky bag, the 4th byte of correspondence bag is 0x02,
0x03,0x04.
In receiving terminal, most at first, first wait until to receive an empty bag, obtained currently from the 4th byte of sky bag
Channel number.This channel number is added 1, the channel number of next bag is obtained, when next bag comes, is stored in corresponding passage,
Channel number is added 1 again, so repeatedly, so that it may separate the 4 road TS transmitted in single ASI.Give and avoided in transmitting procedure
The problem of packet loss is caused, when receiving empty bag every time, all synchronous current channel number once.Lost due to existing in data transmission procedure
The dislocation such as bag, so we are each when receiving empty bag, all obtain the channel number of his institute's band, obtains our corresponding reception moulds
Block.Play the process of a re-synchronization, it is ensured that the correctness of data receiver.
When QAM modulation uses 6.875 symbol rate, during using QAM256, code check is 6.875MBps.And the ASI of single channel
Code check is 27MBps, so in the case where filtering out empty bag, and the ASI of single channel can just transmit 4 road TS streams.
Claims (3)
1. a kind of method of single ASI transmission multichannels TS streams, it is characterised in that：Comprise the following steps：
1) multiple data transmission blocks are set in data sending terminal, all empty bag in ASI sendaisles are filtered out first, after from
The ASI interfaces that data transmission blocks are connected cycle through the single TS bags of each multichannel TS streams successively, when a certain circuit-switched data does not have also
When preparing what a complete TS bag, then insert empty bag and replace；
2) channel number that road TS flows is marked in transmission is per the streams of TS all the way；
3) in data receiver, first etc. receive an empty bag, and extract the channel number of the packet making in being wrapped from sky, after pass through
Channel number is stored in the TS bags received in receiving module corresponding with channel number, and each receiving module is circulated to be connect in turn successively
Each TS bag is received, during using QAM256, code check is 6.875MBps, and single channel ASI code checks are 27MBps, recovers four road TS streams；
When receiving empty bag, re-synchronization channel number, until having received all TS bags.
2. a kind of method of single ASI transmission multichannels TS streams according to claim 1, it is characterised in that：Described step 2)
The mode of the channel number of middle mark TS stream is：Current channel is marked in the 4th byte of empty bag inserted in per the streams of TS all the way
Number.
3. a kind of method of single ASI transmission multichannels TS streams according to claim 1, it is characterised in that：Described step 3)
In extract sending module from empty bag the method for channel number be to extract sky to wrap nybble, and using the value of this byte be logical
Taoist monastic name.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410833752.6A CN104486637B (en) | 2014-12-27 | 2014-12-27 | A kind of method of single ASI transmission multichannels TS streams |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410833752.6A CN104486637B (en) | 2014-12-27 | 2014-12-27 | A kind of method of single ASI transmission multichannels TS streams |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104486637A CN104486637A (en) | 2015-04-01 |
| CN104486637B true CN104486637B (en) | 2017-10-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410833752.6A Active CN104486637B (en) | 2014-12-27 | 2014-12-27 | A kind of method of single ASI transmission multichannels TS streams |
Country Status (1)
| Country | Link |
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| CN (1) | CN104486637B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106534896B (en) * | 2016-11-25 | 2019-06-18 | 北京数码视讯科技股份有限公司 | A kind of transmission method and device of transport stream TS |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002016915A (en) * | 2000-06-30 | 2002-01-18 | Nec Corp | Synchronizing signal generator |
| CN1617589A (en) * | 2004-05-19 | 2005-05-18 | 深圳市富来科技有限公司 | Large volume digital video frequency broadcast multiple item transmission flow transmission system and its method |
| US7428215B2 (en) * | 2003-08-25 | 2008-09-23 | Samsung Electronics Co., Ltd. | Device for filtering out null packet for MPEG-2 transmission |
| CN201369798Y (en) * | 2009-03-28 | 2009-12-23 | 桂林市思奇通信设备有限公司 | Ground digital TV transmitting system |
| CN103686216A (en) * | 2013-10-30 | 2014-03-26 | 陕西高新实业有限公司 | Medium wave synchronization broadcast system |
| CN203813880U (en) * | 2013-11-14 | 2014-09-03 | 成都时代星光科技有限公司 | Portable movable multichannel wireless high-definition image relay system and transmission system |
-
2014
- 2014-12-27 CN CN201410833752.6A patent/CN104486637B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002016915A (en) * | 2000-06-30 | 2002-01-18 | Nec Corp | Synchronizing signal generator |
| US7428215B2 (en) * | 2003-08-25 | 2008-09-23 | Samsung Electronics Co., Ltd. | Device for filtering out null packet for MPEG-2 transmission |
| CN1617589A (en) * | 2004-05-19 | 2005-05-18 | 深圳市富来科技有限公司 | Large volume digital video frequency broadcast multiple item transmission flow transmission system and its method |
| CN201369798Y (en) * | 2009-03-28 | 2009-12-23 | 桂林市思奇通信设备有限公司 | Ground digital TV transmitting system |
| CN103686216A (en) * | 2013-10-30 | 2014-03-26 | 陕西高新实业有限公司 | Medium wave synchronization broadcast system |
| CN203813880U (en) * | 2013-11-14 | 2014-09-03 | 成都时代星光科技有限公司 | Portable movable multichannel wireless high-definition image relay system and transmission system |
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| Publication number | Publication date |
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| CN104486637A (en) | 2015-04-01 |
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