CN106330409B - A kind of multichannel TS video stream transmission method and its system - Google Patents
A kind of multichannel TS video stream transmission method and its system Download PDFInfo
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- 238000012795 verification Methods 0.000 claims description 18
- 230000008569 process Effects 0.000 claims description 12
- 230000001960 triggered effect Effects 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 4
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/61—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/1607—Details of the supervisory signal
- H04L1/1685—Details of the supervisory signal the supervisory signal being transmitted in response to a specific request, e.g. to a polling signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/10—Active monitoring, e.g. heartbeat, ping or trace-route
- H04L43/103—Active monitoring, e.g. heartbeat, ping or trace-route with adaptive polling, i.e. dynamically adapting the polling rate
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/75—Media network packet handling
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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
- H04N21/21—Server components or server architectures
- H04N21/218—Source of audio or video content, e.g. local disk arrays
- H04N21/2183—Cache memory
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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
- H04N21/231—Content storage operation, e.g. caching movies for short term storage, replicating data over plural servers, prioritizing data for deletion
- H04N21/23106—Content storage operation, e.g. caching movies for short term storage, replicating data over plural servers, prioritizing data for deletion involving caching operations
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- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
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- Health & Medical Sciences (AREA)
- Cardiology (AREA)
- General Health & Medical Sciences (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The invention discloses a kind of multichannel TS video stream transmission method and its systems, including multichannel TS video flowing to be transmitted to be stored respectively in multiple channels of the first caching；Judge whether be stored with TS video flowing in the channel of the first caching using polling mechanism, if so, reading TS video flowing out of channel, and package is carried out to TS video flowing using default network protocol and operates to obtain protocol data packet；Otherwise, continue to judge next channel；Protocol data packet is sent in network in a manner of unicast or multicast, after sending successfully, continues to judge next channel using polling mechanism.The present invention can manage the network transmission operation of multichannel TS video flowing simultaneously, improve the efficiency of transmission of TS video flowing by using polling mechanism.
Description
Technical field
The present invention relates to technical field of data transmission, more particularly to a kind of multichannel TS video stream transmission method and its are
System.
Background technique
With the propulsion of the integration of three networks, more and more computer networking technologies are answered extensively in broadcast television industry
With, TS over IP technology is the representative that network technology is applied in radio data system, it by compressed TS video flowing with
IP unicast, multicast form are sent in network and are transmitted.
For the mode of transmission TS video flowing using unicast communication, this kind of transmission mode is more in TS video flowing quantity at present
The case where when efficiency of transmission it is lower.
Therefore, how to provide a kind of multichannel TS video stream transmission method that efficiency of transmission is high and its system is art technology
The current problem to be solved of personnel.
Summary of the invention
The object of the present invention is to provide a kind of multichannel TS video stream transmission method and its system, by using polling mechanism,
The network transmission operation that multichannel TS video flowing can be managed simultaneously, improves the efficiency of transmission of TS video flowing.
In order to solve the above technical problems, the present invention provides a kind of multichannel TS video stream transmission methods, comprising:
Step s101: multichannel TS video flowing to be transmitted is stored respectively in multiple channels of the first caching；
Step s102: judging whether be stored with TS video flowing in the channel of first caching using polling mechanism, if
Have, enters step s103；Otherwise, continue to judge next channel；
Step s103: the TS video flowing is read out of described channel, and using default network protocol to the TS video
Stream carries out package and operates to obtain protocol data packet；
Step s104: the protocol data packet is sent in network in a manner of unicast or multicast, after sending successfully, is returned
Return step s102.
Preferably, it is described read the TS video flowing out of described channel after further include:
FEC verification packet is generated in real time according to the TS video flowing；
FEC verification packet is sent in network together with the protocol data packet.
Preferably, the process for generating FEC verification packet in real time according to the TS video flowing specifically:
Raw column data have in advance in FEC row caching and FEC column caching, that last time operation generates is read respectively, and will
Column data is written in column input-buffer row data writing line input-buffer；
The TS video flowing is copied as two parts, respectively with the line number accordingly and the column data carry out xor operation,
It obtains FEC row data packet and FEC column data packet and respectively corresponds in the deposit FEC row caching and FEC column caching；Institute
It states FEC row data packet and the FEC column data packet is the FEC verification packet.
Preferably, the FEC row caching is ram in slice, and the FEC column caching is the outer DDR2 of piece.
Preferably, the process of the step s101 specifically:
The multichannel TS video flowing to be transmitted is respectively converted into the data flow of default size；
After sync byte 0x47 locking, data flow described in each road is stored respectively to each channel of first caching
It is interior.
Preferably, the default network protocol is specially udp protocol or Real-time Transport Protocol.
In order to solve the above technical problems, the present invention also provides a kind of multichannel TS video stream transmission systems, comprising:
Data cache module, for multichannel TS video flowing to be transmitted to be stored respectively in multiple channels of the first caching
It is interior；
Poll judgment module judges whether be stored with TS video in the channel of first caching for use polling mechanism
Stream, if so, triggered protocol packet generation module；Otherwise, continue to judge next channel；
The protocol package generation module, for reading the TS video flowing out of described channel, and using default network association
View carries out package to the TS video flowing and operates to obtain protocol data packet；
Network sending module for the protocol data packet to be sent in network in a manner of unicast or multicast, and touches
It sends out poll judgment module described and continues to judge next channel.
Preferably, further includes:
FEC verifies packet generation module, for generating FEC verification packet in real time according to the TS video flowing；
The network sending module, which is also used to the FEC verifying packet, is sent to network together with the protocol data packet
It is interior.
The present invention provides a kind of multichannel TS video stream transmission method and its systems, can deposit respectively multichannel TS video flowing
It is stored in multiple channels of caching, and checks whether store TS video flowing in each channel in turn by polling mechanism, if so, then
The TS video flowing is subjected to package operation, and the protocol data packet of generation is sent in network.As it can be seen that the present invention by using
Polling mechanism realizes while managing the network transmission operation of multichannel TS video flowing, substantially increases the transmission effect of TS video flowing
Rate.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to institute in the prior art and embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of flow chart of the process of multichannel TS video stream transmission method provided by the invention；
Fig. 2 is a kind of structural schematic diagram of multichannel TS video stream transmission system provided by the invention.
Specific embodiment
Core of the invention is to provide a kind of multichannel TS video stream transmission method and its system, by using polling mechanism,
The network transmission operation that multichannel TS video flowing can be managed simultaneously, improves the efficiency of transmission of TS video flowing.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Shown in Figure 1 the present invention provides a kind of multichannel TS video stream transmission method, Fig. 1 is provided by the invention one
The flow chart of the process of kind multichannel TS video stream transmission method；This method comprises:
Step s101: multichannel TS video flowing to be transmitted is stored respectively in multiple channels of the first caching；
Wherein, the first caching here is specially ram in slice.In addition, multichannel here is specially 8 tunnels.Certainly, of the invention
To being not particularly limited above.
Step s102: judging whether be stored with TS video flowing in the channel of the first caching using polling mechanism, if so, into
Enter step s103；Otherwise, continue to judge next channel；
Here polling mechanism is a kind of process flow, is issued by CPU timing and inquires whether sequentially inquire each channel
It is stored with TS video flowing, has i.e. progress follow-up service processing, next channel is inquired again after service, then continuous Zhou Erfu
Begin.
Step s103: TS video flowing is read out of channel, and package behaviour is carried out to TS video flowing using default network protocol
Obtain protocol data packet；
Specifically, default network protocol here is specially UDP (User Datagram Protocol, user datagram
Agreement) agreement or RTP (Real-time Transport Protocol, real-time transport protocol) agreement.Udp protocol is a kind of nothing
The network transmission protocol of connection, the agreement do not have congestion control, and the congestion occurred on network will not make the transmission rate of source host
It reduces, meets the network transmission requirement of real-time video, therefore be suitable for certain rings for needing requirement of real-time height, mistake less
Border.
Step s104: protocol data packet is sent in network in a manner of unicast or multicast, after sending successfully, returns to step
Rapid s102.
Wherein, unicast refers between host the communication mode of " one-to-one ", interchanger and router logarithm in network
According to be only forwarded without duplication.Multicast is the communication mode of " one-to-one group " between host, that is, joined same
The host of group can receive all data in this group, and the interchanger and router in network are only to there is demander to replicate and turn
Send out its required data.
For convenience of understanding to the present invention program, below the course of work of the just polling mechanism in the present invention be specific Jie
It continues:
MUX_ST_IDLE: judging ts_buf_ready=' 0 ', and then whether each channel of poll has TS video flowing, works as judgement
When having TS video flowing all the way to certain, MUX_ST_PROC_CH is jumped to.
MUX_ST_PROC_CH: the data of (7x188+8) byte are read from the TS video flowing in the paths, and are written
In the caching of ts_page_ram first.MUX_ST_IDLE is returned, and ts_buf_ready is set 1, subsequent logic is informed, after
The logic in face resets ts_buf_ready when providing ack_ts_buf_ready_i=1.
Preferably, out of channel after reading TS video flowing further include:
FEC (Forward Error Correction, forward error correction) verification packet is generated in real time according to TS video flowing；
FEC verification packet is sent in network together with protocol data packet.
Specifically, generating the process of FEC verification packet in real time according to TS video flowing specifically:
Raw column data have in advance in FEC row caching and FEC column caching, that last time operation generates is read respectively, and will
Column data is written in column input-buffer row data writing line input-buffer；
TS video flowing is copied as two parts, respectively with line number accordingly and column data carry out xor operation, obtain FEC row data
Packet and FEC column data packet simultaneously respectively correspond in deposit FEC row caching and FEC column caching；FEC row data packet and FEC columns
It is FEC verification packet according to packet.
It is understood that can be improved the stability of TS video flowing transmission by increasing FEC verification operation, reduces and pass
The appearance of defeated failure.
Preferably, FEC row caching here is ram in slice, and FEC column caching is the outer DDR2 of piece.
Wherein, the process of step s101 specifically:
Multichannel TS video flowing to be transmitted is respectively converted into the data flow of default size；
After sync byte 0x47 locking, each circuit-switched data stream is stored respectively to each channel of the first caching.
Here default size can be 25M, and certainly, this is not limited by the present invention.
In addition, the operation of step s101 can be carried out by the asynchronous FIFO module inside FPGA.
For convenience of understanding to the present invention program, below just in the present invention protocol data packet and FEC verification packet generation
And transmission process does simple introduction:
TX_ST_IDLE: original state judges whether to have received ready_buffer_in and fec_in_ready signal
(judging whether ready_buffer_in and fec_in_ready is 1, if so, showing the above-mentioned signal received), wherein
Ready_buffer_in signal indicates that (the TS video flowing read out out of channel is stored in the caching of ts_page_ram second
In ts_page_ram) in have data；Fec_in_ready signal indicates the raw column data of last time operation generation from FEC row
It is read in caching and FEC column caching, and is written into row fec in ram row input-buffer and col fec in ram respectively
In column input-buffer；
TX_RTP_PKT: starting counting, and data are read from ts_page_ram, at the same read row_fec_in_ram with
And the data in col_fec_in_ram, by the TS video stream data read from ts_page_ram point three tunnels, all the way directly into
Enter pro_mpeg_frm_gen module and generate corresponding UDP packet or RTP packet, and is stored in frame_buf third caching.Other two
Road obtains FEC row data packet after carrying out exclusive or with the raw column data in row_fec_in_ram and col_fec_in_ram respectively
And FEC column data packet and respectively correspond write-in row_fec_out_ramFEC row caching and col_fec_out_ramFEC column
In caching.When counting down to specified numerical value, into NextState.
Wherein, FEC verification operation is if desired carried out, then carries out subsequent operation, otherwise, reads the UDP packet in third caching
Or RTP packet is sent to network.
CHECK_RFEC: judge whether the FEC row data packet of transmission in need, if not provided, into CHECK_CFEC；If
Have, then enters RFEC_WAIT_PKT_BUF.
RFEC_WAIT_PKT_BUF: judging whether the subsequent buffer area buffer has space, if so, into RFEC_RTP_
PKT。
RFEC_RTP_PKT: the FEC row data packet in row_fec_out_ram is read, and is sent into pro_mpeg_frm_
Gen module generates row FEC packet, is written in frame_buf, reads the row FEC packet in frame_buf by subsequent logic and sends out
It send to network.Into CHECK_CFEC.
CHECK_CFEC: judge whether the FEC column data packet of transmission in need, if not provided, into WAIT_PKT_BUF；
If so, then entering CFEC_WAIT_PKT_BUF.
CFEC_WAIT_PKT_BUF: judging whether the subsequent buffer area buffer has space, if so, into CFEC_RTP_
PKT。
CFEC_RTP_PKT: the FEC column data packet in col_fec_out_ram is read, and is sent into pro_mpeg_frm_
Gen module generates col FEC packet, is written in frame_buf, reads the col FEC packet in frame_buf by subsequent logic and sends out
It send to network.Into WAIT_PKT_BUF.
WAIT_PKT_BUF: judging whether the subsequent buffer area buffer has space, if so, returning to original state.
The present invention provides a kind of multichannel TS video stream transmission methods, multichannel TS video flowing can be stored respectively in caching
Multiple channels in, and check TS video flowing whether is stored in each channel in turn by polling mechanism, if so, then regarding the TS
Frequency stream carries out package operation, and the protocol data packet of generation is sent in network.As it can be seen that the present invention is by using poll machine
System realizes while managing the network transmission operation of multichannel TS video flowing, substantially increases the efficiency of transmission of TS video flowing.
Shown in Figure 2 the present invention also provides a kind of multichannel TS video stream transmission system, Fig. 2 is provided by the invention
A kind of structural schematic diagram of multichannel TS video stream transmission system.The system includes:
Data cache module 11, for multichannel TS video flowing to be transmitted to be stored respectively in multiple channels of the first caching
It is interior；
Poll judgment module 12 judges whether be stored with TS video in the channel of the first caching for use polling mechanism
Stream, if so, triggered protocol packet generation module 13；Otherwise, continue to judge next channel；
Protocol package generation module 13, for reading TS video flowing out of channel, and using default network protocol to TS video
Stream carries out package and operates to obtain protocol data packet；
Network sending module 14 for protocol data packet to be sent in network in a manner of unicast or multicast, and triggers
Poll judgment module 12 continues to judge next channel.
Preferably, the system further include:
FEC verifies packet generation module, for generating FEC verification packet in real time according to TS video flowing；
Network sending module 14 is also used to FEC verifying packet and be sent in network together with protocol data packet.
The present invention provides a kind of multichannel TS video stream transmission systems, multichannel TS video flowing can be stored respectively in caching
Multiple channels in, and check TS video flowing whether is stored in each channel in turn by polling mechanism, if so, then regarding the TS
Frequency stream carries out package operation, and the protocol data packet of generation is sent in network.As it can be seen that the present invention is by using poll machine
System realizes while managing the network transmission operation of multichannel TS video flowing, substantially increases the efficiency of transmission of TS video flowing.
It should be noted that in the present specification, relational terms such as first and second and the like are used merely to one
A entity or operation with another entity or operate distinguish, without necessarily requiring or implying these entities or operation it
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to
Cover non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or setting
Standby intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in the process, method, article or apparatus that includes the element.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (8)
1. a kind of multichannel TS video stream transmission method characterized by comprising
Step s101: multichannel TS video flowing to be transmitted is stored respectively in multiple channels of the first caching；
Step s102: judging whether be stored with TS video flowing in the channel of first caching using polling mechanism, if so, into
Enter step s103；Otherwise, continue to judge next channel；
Step s103: the TS video flowing is read out of described channel, and the TS video is flowed into using default network protocol
Row package operates to obtain protocol data packet；
Step s104: the protocol data packet is sent in network in a manner of unicast or multicast, after sending successfully, returns to step
Rapid s102.
2. the method according to claim 1, wherein it is described read the TS video flowing out of described channel after
Further include:
FEC verification packet is generated in real time according to the TS video flowing；
FEC verification packet is sent in network together with the protocol data packet.
3. according to the method described in claim 2, it is characterized in that, described generate FEC verification according to the TS video flowing in real time
The process of packet specifically:
Raw column data have in advance in FEC row caching and FEC column caching, that last time operation generates is read respectively, and by line number
According to writing line input-buffer, column data is written in column input-buffer；
The TS video flowing is copied as two parts, respectively with the line number accordingly and the column data carry out xor operation, obtain
FEC row data packet and FEC column data packet simultaneously respectively correspond in the deposit FEC row caching and FEC column caching；It is described
FEC row data packet and the FEC column data packet are the FEC verification packet.
4. according to the method described in claim 3, the FEC column cache it is characterized in that, FEC row caching is ram in slice
For DDR2 outside piece.
5. the method according to claim 1, wherein the process of the step s101 specifically:
The multichannel TS video flowing to be transmitted is respectively converted into the data flow of default size；
After sync byte 0x47 locking, data flow described in each road is stored respectively to each channel of first caching.
6. according to the method described in claim 2, it is characterized in that, the default network protocol is specially udp protocol or RTP association
View.
7. a kind of multichannel TS video stream transmission system characterized by comprising
Data cache module, for multichannel TS video flowing to be transmitted to be stored respectively in multiple channels of the first caching；
Poll judgment module judges whether be stored with TS video flowing in the channel of first caching for use polling mechanism,
If so, triggered protocol packet generation module；Otherwise, continue to judge next channel；
The protocol package generation module, for reading the TS video flowing out of described channel, and using default network protocol pair
The TS video flowing carries out package and operates to obtain protocol data packet；
Network sending module for the protocol data packet to be sent in network in a manner of unicast or multicast, and triggers institute
Poll judgment module is stated to continue to judge next channel.
8. system according to claim 7, which is characterized in that further include:
FEC verifies packet generation module, for generating FEC verification packet in real time according to the TS video flowing；
The network sending module is also used to the FEC verifying packet and be sent in network together with the protocol data packet.
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| CN100358363C (en) * | 2004-05-19 | 2007-12-26 | 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 |
| CN101931492A (en) * | 2009-06-25 | 2010-12-29 | 中兴通讯股份有限公司 | Method for determining data block forward error correction algorithm and device thereof |
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