CN202261655U - Adaptive coding and transmission system of multi-channel video at limited bandwidth - Google Patents
Adaptive coding and transmission system of multi-channel video at limited bandwidth Download PDFInfo
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- CN202261655U CN202261655U CN 201120407469 CN201120407469U CN202261655U CN 202261655 U CN202261655 U CN 202261655U CN 201120407469 CN201120407469 CN 201120407469 CN 201120407469 U CN201120407469 U CN 201120407469U CN 202261655 U CN202261655 U CN 202261655U
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Abstract
The utility model relates to an adaptive coding and transmission system of multi-channel video at limited bandwidth. The adaptive coding and transmission system is characterized by comprising a server end and a client end, which are connected through a network, wherein the server end comprises a local playback module, a local cache module, a coding module, a sending module, a control module and a cloud platform control module; the coding module is used for outputting coding code flows of different qualities according to the average code rate requirements; the control module is used for adjusting the average code rate of each channel of video; and the client end comprises a receiving module, a decoding display unit and a subscriber interface. By adopting the adaptive coding and transmission system provided by the utility model, high-quality and large-subscriber-number video transmission can be finished in a network state with stable and limited bandwidth, perfect using experience can be still provided under the condition of crowded subscriber, and the video transmission quality is guaranteed.
Description
Technical field
The utility model belongs to multimedia technology field, is specifically related to a kind of multi-channel video adaptive coding transmission system under bandwidth restricted.
Background technology
Along with information technology is maked rapid progress, computer networking technology, image processing techniques and communication technology develop rapidly have promoted the continuous development and the renewal of video technique greatly.Thereby Video transmission system is based on a kind of system that the digital compression coding techniques is realized real-time Transmission, is core with the computer, adopts new and high technology; In conjunction with the actual requirement of Video transmission system and continuous for many years perfect security protection theory and experience; Set up cover software and hardware video transmission system that combine, brand-new, complete, optimize internal structure, reduce unnecessary link; Improve overall performance and response speed, satisfy the constantly demand of development of technology.But there is following problem in existing Video transmission system: 1, bandwidth occupancy problem, the video data volume big limited with the network bandwidth be the bottleneck that the restriction Video transmission system is developed always.When 2, video data compresses, redundant information wherein, make in the data volume of transmission through network big, thereby the requirement of the network bandwidth is increased.3, procotol and the transmission algorithm during video transmission is not best, so the effect of its transmission is unsatisfactory.4,, thereby badly influence the laser propagation effect of video owing to reasons such as the variation of network state parameter, system user number change.
The utility model content
The purpose of the utility model is the deficiency that overcomes above-mentioned existence; Multi-channel video adaptive coding under a kind of bandwidth restricted transmission system is provided; This system has the time-varying Characteristics that adapts to network state information, and coupling system is application characteristic in power industry, can be according to variation, system user quantity, the video weight of network state parameter; Automatically come the video data Network Transmission code check of Adjustment System, to guarantee that client obtains better experience under limited bandwidth.
The technical scheme that the utility model is adopted in order to achieve the above object is:
Multi-channel video adaptive coding transmission system under a kind of bandwidth restricted; It is characterized in that comprising server end and client; Said server end is connected through network with client; Said server end comprises local playback module, local cache module, the coding module according to the encoding code stream of average bit rate requirement output different quality, sending module, according to the control module and the cradle head control module of the average bit rate of each road video of strategy adjustment, said client comprises receiver module, decoding and displaying unit and user interface.
Multi-channel video adaptive coding transmission system under the bandwidth restricted described in the utility model is characterized in that the coding of the system in the said coding module meets H.264 standard.
Multi-channel video adaptive coding transmission system under the bandwidth restricted described in the utility model is characterized in that the code stream of encoding in the said sending module adopts the UDP mode to send in constrained system, send standard and meet " real time streaming transport protocol ".
The utility model can be accomplished the video transmission of high-quality, large user's number under the stable but limited network state of bandwidth, and guarantees that the user still provides desirable user's experience under crowded situation, guarantee video transmission quality.
Description of drawings
Fig. 1 is the utility model structured flowchart.
Embodiment
The utility model concrete operations are: the multi-channel video adaptive coding transmission system under the bandwidth restricted; It comprises server end and plurality of client end; Wherein server end is connected through network with these plurality of client ends; Said server end comprises local playback module, local cache module, the coding module according to the encoding code stream of average bit rate requirement output different quality, sending module, according to the control module and the cradle head control module of the average bit rate of each road video of strategy adjustment, said client comprises receiver module, decoding and displaying unit and user interface.The coding of the system in the aforesaid coding module meets H.264 standard, and the code stream of encoding in the sending module adopts the UDP mode to send in constrained system, sends standard and meets " real time streaming transport protocol ".
Effect and operation principle in the face of each important module in the native system describes in detail down.
Coding module: the coding of whole system meets H.264 standard, can require the encoding code stream of output different quality according to average bit rate.The code stream code check is through assessment in native system, and it is divided into three, and shelves: A-is outstanding, B-is common, C-is fuzzy.Simultaneously, also export the motion vector value of each road image during video coding.
Receiver module mainly acts on or task is: 1, preparatory buffering, receiver, video code stream; 2, out of order video code flow is reordered; 3, when server report code curtain coating, disappearance.
Control module: according to the average bit rate (quality) of each road video of strategy adjustment, concrete accent increases strategy as follows: 1, each road code stream connects all has a unique independently bandwidth occupancy weighted value M, this value decision coding average bit rate.2,, link promptly has an initial weighted value M at the beginning of setting up; 3, every through one period regular time, M reduces R1; 4, every foundation new a connection, M reduces R2; 5, bandwidth congestion of every prediction, M reduces R2; 6, the every inspection of code stream surveyed the motion vector that once surpasses the image of threshold values, and M increases P1; 7, encoder bit rate of the every generation of code stream descends, and M increases P2; 8, control module is adjusted the encoder bit rate that each road video connects according to the M value.Wherein R1, R2, P1, P2 are system's fixed value.
Be elaborated in the face of native system video transmission mode down: after server end is received new connection request, estimate the back bandwidth that connects and whether surpass preset value,, and safeguard the weighted value M of this connection, end task at last if do not surpass then connect.If surpass then connect then the M value that has link is sorted; The minimum road concatenated coding code check of M value is reduced one-level to be returned connection request then and circulates once more and (be " A-outstanding " if said encoder bit rate reduces the encoder bit rate that one-level refers to former link here; Then be reduced to " B-is common "; If be " B-is common ", then reduce to " C-is fuzzy ".If be " C-is fuzzy ", then break off this road and connect; End task at last down together).Client receiver module report data packet loss or time-delay are sorted to the M value that has link simultaneously, and the road concatenated coding code check minimum to the M value reduces one-level.Receive at last and finish or break off and end task.
Claims (3)
1. the multi-channel video adaptive coding transmission system under the bandwidth restricted; It is characterized in that comprising server end and client; Said server end is connected through network with client; Said server end comprises local playback module, local cache module, the coding module according to the encoding code stream of average bit rate requirement output different quality, sending module, according to the control module and the cradle head control module of the average bit rate of each road video of strategy adjustment, said client comprises receiver module, decoding and displaying unit and user interface.
2. the multi-channel video adaptive coding transmission system under the bandwidth restricted according to claim 1 is characterized in that the coding of the system in the said coding module meets H.264 standard.
3. the multi-channel video adaptive coding transmission system under the bandwidth restricted according to claim 1 is characterized in that the code stream of encoding in the said sending module adopts the UDP mode to send in constrained system, send standard and meet " real time streaming transport protocol ".
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120407469 CN202261655U (en) | 2011-10-24 | 2011-10-24 | Adaptive coding and transmission system of multi-channel video at limited bandwidth |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120407469 CN202261655U (en) | 2011-10-24 | 2011-10-24 | Adaptive coding and transmission system of multi-channel video at limited bandwidth |
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| Publication Number | Publication Date |
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| CN202261655U true CN202261655U (en) | 2012-05-30 |
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| CN 201120407469 Expired - Fee Related CN202261655U (en) | 2011-10-24 | 2011-10-24 | Adaptive coding and transmission system of multi-channel video at limited bandwidth |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104158831A (en) * | 2013-05-13 | 2014-11-19 | 朱晓扬 | Optimal network video and audio self-adaptive technology of mobile medical service system |
| CN109862442A (en) * | 2019-02-22 | 2019-06-07 | 伟乐视讯科技股份有限公司 | A kind of input method for stream processing and processing unit based on IP transmission |
-
2011
- 2011-10-24 CN CN 201120407469 patent/CN202261655U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104158831A (en) * | 2013-05-13 | 2014-11-19 | 朱晓扬 | Optimal network video and audio self-adaptive technology of mobile medical service system |
| CN109862442A (en) * | 2019-02-22 | 2019-06-07 | 伟乐视讯科技股份有限公司 | A kind of input method for stream processing and processing unit based on IP transmission |
| CN109862442B (en) * | 2019-02-22 | 2022-05-17 | 伟乐视讯科技股份有限公司 | Input stream processing method and processing device based on IP transmission |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20141024 |
|
| EXPY | Termination of patent right or utility model |