CN106713345A - Streaming media transmission method - Google Patents
Streaming media transmission method Download PDFInfo
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- CN106713345A CN106713345A CN201710019204.3A CN201710019204A CN106713345A CN 106713345 A CN106713345 A CN 106713345A CN 201710019204 A CN201710019204 A CN 201710019204A CN 106713345 A CN106713345 A CN 106713345A
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- video
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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
- H04L65/762—Media network packet handling at the source
-
- 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
- H04L65/65—Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
-
- 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
- H04L65/764—Media network packet handling at the destination
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
Abstract
The invention relates to a streaming media transmission method. The streaming media transmission method comprises five steps: step 1, playing a video, converting the video to a video frame, and implementing coding compression on the video frame; step 2, feeding the video frame which is subjected to coding compression to an application sending buffer area, and determining how to process the video frame which is subjected to coding compression and determining the delay level of the application sending buffer area by using a traffic scheduling model; step 3, feeding the video frame to a TCP sending buffer area, dividing into message segments, and checking sending errors; step 4, restoring to the video frame in the TCP sending buffer area, and sending the video frame to a play buffer area; and step 5, playing the video after waiting in the play buffer area. According to the streaming media transmission method disclosed by the invention, a sending buffer area is established on an application layer, the video frame is scheduled between the buffer area and the TCP sending buffer area to ensure that the waiting delay can be greatly reduced, and thus the end-to-end delay can be significantly reduced, the transmission rate can be matched with the available bandwidth of the network, and the service quality of the video can be ensured.
Description
Technical field
The present invention relates to streaming media field, it is related to a kind of flow-medium transmission method.
Background technology
Real time flow medium is the prevailing transmission object of next generation network, will greatly influence people's daily life.Use biography
Defeated real time flow medium have network condition is swift in response, it is friendly, be easy to be received by fire wall, be easy to implement and maintenance etc. is excellent
Point, but simultaneously there is also transmission in cannot adaptive network available bandwidth fluctuation, retransmit easily increase media bag time delay tremble
Dynamic the problems such as, these all significantly reduce the service quality and transmission quality of real time flow medium, accordingly, it would be desirable to break through the above ask
Topic, finds a kind of good flow-medium transmission method.
The content of the invention
In view of this, the present invention provides a kind of flow-medium transmission method for solving or partly solving the above problems.To reach
The effect of above-mentioned technical proposal, the technical scheme is that：A kind of flow-medium transmission method, comprises the steps of：
1) video is commenced play out in network, when playing request starts, by video by with the intrinsic sampling of 50 frame per second
Frequency carries out sample conversion into frame of video, and frame of video is carried out into compression coding with the frame per second feeding encoder of 20 frame per second, encodes
The coding delay of device is equal to the inverse of frame per second；
2) the frame of video feeding application after compression coding is sent into buffering area, is compiled for interim storage using buffering area is sent
Code compression after frame of video, application send buffering area in using flow scheduling model determine how to process using transmission buffering area
In compression coding after frame of video；
Flow scheduling model sets the time delay rank that application sends buffering area, the coding in discovery application sends buffering area
Frame of video after compression is space-time, and the coding delay and application according to encoder send the time delay rank of buffering area, extract symbol
Frame of video feeding application after the compression coding of the coding delay for closing encoder is sent in buffering area, will be using in transmission buffering area
Compression coding after frame of video TCP called according to the time delay rank that application sends buffering area send buffering area, and ensure TCP
The frame of video after a compression coding is only existed in transmission buffering area, the video after the compression coding in buffering area is sent to application
Frame carries out respective handling according to buffer time adaptive algorithm, and buffer time adaptive algorithm will be slow in application transmission buffering area
Deposit and regard dynamic change as, and the reserved caching of setting goes temporarily storage using after the compression coding for sending buffer overflow
Frame of video, when in the absence of spillover, reclaims to reserved caching, and record the rate of recovery of reserved caching, using transmission
The time delay rank of buffering area；
It is divided into time delay grade one, time delay grade two, time delay grade three using the time delay rank for sending buffering area；Time delay etc.
Level one represents that the stand-by period for sending buffering area in application is 0, if there is two and the above using sending in buffering area
During frame of video after compression coding, only retain feeding application at first and send the frame of video after the compression coding of buffering area, phase reaction
It is directly over entering TCP transmission buffering areas using transmission buffering area with the frame of video after the compression coding sent in buffering area；Prolong
When grade two represent application send buffering area stand-by period be equal to encoder coding delay, i.e., application send buffering area in
At most there is the frame of video after two compression codings, only retaining after send at first two compression codings that application sends buffering area
Frame of video；Time delay grade three represents that the stand-by period for sending buffering area in application is equal to 2 times of the coding delay of encoder, i.e., should
With at most there are the frame of video after three compression codings in transmission buffering area, only retaining and send at first application sends buffering area three
Frame of video after individual compression coding；
3) reaching the frame of video after the compression coding of TCP transmission buffering areas will be divided into by protocol stack according to its size first
Multiple message segments, are ranked up to message segment, and are identified with sequence number, and message segment TCP sent in buffering area sends
Buffering area is received to TCP, wherein, the transmission of multiple message segments is controlled according to sliding window and congestion control mechanism, sending
During using send controller, send controller in there is a caching for message size, when sending, will send out
The message for sending is stored in the caching for sending controller together with sequence number, the time for sending, and monitors the transmission of message segment, when sequence number not
Consecutive hours, it is found that message segment is lost, it is determined that the message segment lost, message segment is taken out from the caching for sending controller；
4) in the TCP receives buffering area, the reconstruct of multiple message segments is reverted into the frame of video after compression coding,
Passed through decoder to be decoded and reverted to frame of video, be immediately fed into recipient play buffer；
5) stand-by period of the playback rate and frame of video of video in recipient play buffer is set, and frame of video exists
Stand-by period in recipient play buffer is equal to the twice of the playback rate inverse of video, and frame of video plays slow in recipient
Area is rushed by after the stand-by period in recipient play buffer, can just carry out the broadcasting of video.
Useful achievement of the invention is：The present invention establishes a transmission buffering area in application layer, exists by frame of video
The buffering area and TCP are scheduled between sending buffering area, drastically reduce the area the wait time delay of frame of video, and then significantly reduce
Total time delay end to end, and enable the available bandwidth of transmission rate matching network, it is ensured that the service quality of video.
Specific embodiment
In order that the technical problems to be solved by the invention, technical scheme and beneficial effect become more apparent, below tie
Embodiment is closed, the present invention will be described in detail.It should be noted that specific embodiment described herein is only used to explain
The present invention, is not intended to limit the present invention, and can realize that the product of said function belongs to equivalent and improvement, is all contained in this hair
Within bright protection domain.Specific method is as follows：
Embodiment 1：The present invention is provided with multiple buffering area, and the characteristic of buffering area is as follows：
TCP sends buffering area and is managed and safeguarded by protocol stack, and application program can not process the data in the buffering area, delays
The all frame of video rushed in area all must the flow of foundation be transmitted with congestion control mechanism, therefore when a frame of video is still located
In the state of transmission, and subsequent video frame when having been enter into transmission buffering area, it is necessary to wherein processing, transmission rate is smaller,
And the video requency frame data of application layer still with fix frame per second be continuously fed to send buffering area when, will eventually lead to send buffering area overflow
Go out, so that the frame of video for then producing will be simply discarded, cause significantly reducing or losing important for video playing quality
Scene information.
Application program cannot directly manage or bypass transmission buffering area, overcome its intrinsic shortcoming, the present invention to devise
One transmission buffering area for being located at application layer, is to enter before TCP transmission buffering areas using frame of video in encoded, first by it
Send into this and apply buffering area.
The application of design sends the frame of video after buffering area is used for interim storage coding, and according to scheduling model to being stored
Frame of video be scheduled.There is time delay rank using buffering area is sent, be divided into using the time delay rank for sending buffering area and prolonging
When grade one, time delay grade two, time delay grade three；Time delay grade one represents that the stand-by period for sending buffering area in application is 0, i.e.,
If during using there is the frame of video after two and the compression coding of the above in transmission buffering area, only retaining and sending at first using hair
The frame of video after the compression coding of buffering area, the frame of video that phase reaction sends after the compression coding in buffering area is sent to be directly over
Enter TCP transmission buffering areas using buffering area is sent；Time delay grade two represents that the stand-by period for sending buffering area in application is equal to
At most there is the frame of video after two compression codings in the coding delay of encoder, i.e. application, only retain at first in sending buffering area
Feeding application sends the frame of video after two compression codings of buffering area；Time delay grade three represent application send buffering area etc.
Treat that the time is equal to 2 times of the coding delay of encoder, i.e., using most in the presence of regarding after three compression codings in transmission buffering area
Frequency frame, only retains feeding application at first and sends the frame of video after three compression codings of buffering area；
Receive buffering area characteristic be it will will not advance to reach, the message segment of out of order arrival submits to application in advance
Layer, but just submit data to application layer after all message segments having to wait in a window are all reached.It ensure that report
The loss of literary section or out of order arrival be for application program it is transparent, application program without carry out again packet loss detection with
Sequence work.
Embodiment two：Further optimization to buffering area：
Play buffer is located at application layer, and its purpose of design is to eliminate trembling caused by the irregular arrival of frame of video
It is dynamic, it is all that play buffer can be initially entered by the frame of video that transmission buffering area submits to application layer, and at most wait one is broadcast
Put time delay.Another important use of play buffer is to eliminate the delay jitter caused by retransmitting, if i.e. transmitting procedure
In cause message segment loss, if lose message segment re-transmission caused by larger time delay can be played buffering area elimination,
Then this loss and re-transmission are transparent for reciever application program.The present invention takes play buffer static method and dynamic
The mode that method is combined, i.e., it is two fixed frame signs to use static method to set play buffering time delay in the conversation initial stage,
I.e. buffering area time delay for twice encoding time delay, and accordingly come set frame of video forward delay interval need meet necessary condition and work as
It was found that network congestion is more serious, and when still effectively can not eliminate delay jitter using Adaptive Transmission strategy, then according to model,
Play buffering is suitably adjusted using dynamic method.
To further optimizing using transmission buffer area, the sum of record frame of video is lost with layer transmission buffering area is employed
The sum of the frame of video abandoned, calculates loss ratio accordingly.When network congestion is serious, when causing Network Packet Loss phenomenon to increase, can immediately
Congestion window size is reduced, so as to the forward delay interval for causing frame of video increases, the loss ratio of buffering area also can accordingly increase.Instead
It, when network condition is preferable, the value of loss ratio also can accordingly reduce, and can interpolate that the change of network condition.On the other hand, when
The encoded interval time of frame of video reduces, i.e., when frame per second increases, the transmission rate of sender can accordingly be increased to cause network
Available bandwidth is reduced, and increases the Congestion Level SPCC of network.Conversely, when frame per second is reduced, transmission rate reduction can alleviate Congestion Level SPCC,
Therefore, so that transmission rate adapts to the available bandwidth of network, the Congestion Level SPCC of network can be improved by adjusting frame per second.Pass through
The loss ratio of buffering area, can reflect the congestion condition of network, and transmission rate is adjusted by adjusting frame per second so that speed
Network availability bandwidth is can adapt to, the more video informations of existing network bandwidth transmission can be made full use of, so as to improve regard
Feel quality.
The preferred embodiments of the invention is the foregoing is only, claims of the invention are not limited to.
Simultaneously it is described above, for those skilled in the technology concerned it would be appreciated that and implement, therefore other be based on institute of the present invention
The equivalent change that disclosure is completed, should be included in the covering scope of the claims.
Useful achievement of the invention is：The present invention establishes a transmission buffering area in application layer, exists by frame of video
The buffering area and TCP are scheduled between sending buffering area, drastically reduce the area the wait time delay of frame of video, and then significantly reduce
Total time delay end to end, and enable the available bandwidth of transmission rate matching network, it is ensured that the service quality of video.
Claims (1)
1. a kind of flow-medium transmission method, it is characterised in that comprise the steps of：
1) video is commenced play out on network, when playing request starts, by video by with the intrinsic sampling of 50 frame per second frequently
Rate carries out sample conversion into frame of video, and the frame of video is carried out into compression coding, institute with the frame per second feeding encoder of 20 frame per second
The coding delay for stating encoder is equal to the inverse of the frame per second；
2) by compression coding after the frame of video send into the application and send buffering area, the application sends buffering area to be used to face
When store the frame of video after the compression coding, the application send buffering area in using flow scheduling model determine such as
Manage the frame of video after the compression coding during the application sends buffering area in where；
The flow scheduling model sets the time delay rank that the application sends buffering area, when the discovery application sends buffering area
In the compression coding after the frame of video be space-time, coding delay according to the encoder and the application send
The time delay rank of buffering area, the frame of video feeding after the compression coding of the coding delay that extraction meets the encoder
The application is sent in buffering area, and the application is sent into the frame of video after the compression coding in buffering area according to institute
State and call in TCP transmission buffering areas using the time delay rank for sending buffering area, and ensure that the TCP is only existed in sending buffering area
The frame of video after one compression coding, to the application send buffering area in the compression coding after described in regard
Frequency frame carries out respective handling according to buffer time adaptive algorithm, and the application is sent slow by the buffer time adaptive algorithm
The caching rushed in area is considered as dynamic change, and the reserved caching of setting goes temporarily storage to be sent in buffering area from the application
The frame of video after the compression coding for overflowing, when in the absence of spillover, reclaims to the reserved caching, and
Record the time delay rank that the rate of recovery of the reserved caching, the application send buffering area；
The time delay rank that the application sends buffering area is divided into time delay grade one, time delay grade two, time delay grade three；It is described
Time delay grade one represents that the stand-by period for sending buffering area in the application is 0, if that is, described application is deposited in sending buffering area
In the frame of video after the compression coding of two and the above, only retain and send into the application at first and send buffering area
The frame of video after the compression coding, the opposite application sends the video after the compression coding in buffering area
Frame is directly over the application and sends buffering area into TCP transmission buffering areas；The time delay grade two is represented answers described
The coding delay of the encoder is equal to the stand-by period for sending buffering area, i.e., described application at most exists in sending buffering area
The frame of video after two compression codings, only retains and sends into two codings that the application sends buffering area at first
The frame of video after compression；The time delay grade three represents that the stand-by period for sending buffering area in the application is equal to the volume
2 times of coding delay of code device, i.e., described application sends in buffering area and at most to be regarded in the presence of described after three compression codings
Frequency frame, only retains and sends into the frame of video after the application sends three compression codings of buffering area at first；
3) reach the TCP send the frame of video after the compression coding of buffering area by first by protocol stack according to its
Size is divided into multiple message segments, and the message segment is ranked up, and is identified with sequence number, the TCP is sent and is buffered
The message segment in area is sent to TCP and receives buffering area, wherein, control multiple according to sliding window and congestion control mechanism
The transmission of the message segment, using controller is sent during transmission, exists described in one in the transmission controller
The caching of message size, when sending, the message that will sending is stored in the hair together with the sequence number, the time for sending
In sending the caching of controller, and the transmission of the message segment is monitored, when the sequence number is discontinuous, it is found that the message segment is lost
Lose, it is determined that the message segment lost, the message segment is taken out from the caching of the transmission controller；
4) in the TCP receives buffering area, by multiple message segments reconstruct revert to after the compression coding described in regard
Frequency frame, is decoded and is reverted to the frame of video by the decoder, is immediately fed into recipient play buffer；
5) stand-by period of the playback rate and the frame of video of video in the recipient play buffer is set, it is described
Stand-by period of the frame of video in the recipient play buffer is equal to the twice of the playback rate inverse of the video, described
Frame of video is in the recipient play buffer by after the stand-by period in the recipient play buffer, can just be regarded
The broadcasting of frequency.
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| CN201710019204.3A CN106713345A (en) | 2017-01-11 | 2017-01-11 | Streaming media transmission method |
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| CN201710019204.3A CN106713345A (en) | 2017-01-11 | 2017-01-11 | Streaming media transmission method |
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Cited By (6)
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| CN108347645A (en) * | 2018-01-19 | 2018-07-31 | 浙江大华技术股份有限公司 | A kind of method and device that video frame decoding is shown |
| CN108377428A (en) * | 2018-02-07 | 2018-08-07 | 深圳市亿联智能有限公司 | A kind of high efficiency safety monitoring equipment audio, video data flow control methods |
| CN111436009A (en) * | 2019-01-11 | 2020-07-21 | 厦门雅迅网络股份有限公司 | Real-time video stream transmission and display method and transmission and play system |
| CN112187587A (en) * | 2020-10-22 | 2021-01-05 | 广州佰锐网络科技有限公司 | Streaming media communication data processing method and system |
| CN115189810A (en) * | 2022-07-07 | 2022-10-14 | 福州大学 | Low-delay real-time video FEC coding transmission control method |
| WO2024120214A1 (en) * | 2022-12-08 | 2024-06-13 | 广州市百果园网络科技有限公司 | Coding control method and apparatus, and device, storage medium and product |
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Application publication date: 20170524 |