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Method, device and system for video transmission

A video transmission and video streaming technology, applied in the field of video transmission, can solve the problem of affecting the video quality of the receiving end and the importance of data is not exactly the same, and achieve the effect of reducing the bit error rate and improving the quality.

Inactive Publication Date: 2015-08-12
PEKING UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the process of implementing the above-mentioned video transmission, it is found that there are at least the following problems in the prior art, including: the importance of each layer of data in the SVC video stream is not exactly the same, if according to the above method, the same without distinction When the base layer data is scheduled to sub-channels with poor quality conditions, it will seriously affect the quality of the video at the receiving end

Method used

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  • Method, device and system for video transmission
  • Method, device and system for video transmission
  • Method, device and system for video transmission

Examples

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Embodiment 1

[0033] An embodiment of the present invention provides a video transmission method, such as figure 1 As shown, the method includes:

[0034] 101. The sending end uses the SVC to process the source video data to obtain a video stream with a multi-layer structure, and the importance of each layer of video stream in the video stream with a multi-layer structure is different.

[0035] Wherein, the video stream of the multi-layer structure includes a base layer video stream and a plurality of enhancement layer video streams; the base layer video stream has the strongest importance, and if some data packets are lost during transmission, it may cause the receiving The terminal cannot receive data normally. The importance of the enhancement layer video stream is weaker than that of the basic layer, which is used to enhance the quality of the video; the importance of the first strong layer in multiple enhancement layer video streams is the strongest among all enhancement layers, and o...

Embodiment 2

[0047] An embodiment of the present invention provides a video transmission method, such as figure 2 shown, including:

[0048] 201. The sending end uses the scalable video coding technology SVC to process the source video data to obtain a video stream with a multi-layer structure, and the importance of each layer of video stream in the video stream with a multi-layer structure is different.

[0049] Wherein, the video stream of the multi-layer structure includes a base layer video stream and a plurality of enhancement layer video streams; the base layer video stream has the strongest importance, and if some data packets are lost during transmission, it may cause the receiving The terminal cannot receive data normally. The importance of the enhancement layer video stream is weaker than that of the basic layer, which is used to enhance the quality of the video; the importance of the first strong layer in multiple enhancement layer video streams is the strongest among all enha...

Embodiment 3

[0064] An embodiment of the present invention provides a sending end, such as image 3 As shown, the sending end includes: a data processing unit 31 , an acquiring unit 32 , a scheduling unit 33 , a selecting unit 34 , a modulating unit 35 and a sending unit 36 ​​.

[0065] The data processing unit 31 is configured to use the scalable video coding technology SVC to process the source video data to obtain a video stream with a multi-layer structure, and the importance of each layer of the video stream in the multi-layer structure video stream is different.

[0066] The obtaining unit 32 is configured to obtain the channel quality of each sub-channel in the multi-antenna system.

[0067] The scheduling unit 33 is configured to, according to the channel quality of each sub-channel acquired by the acquiring unit 32, and according to the principle that video streams with higher importance are scheduled to sub-channels with better channel quality, the data processing unit Video str...

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Abstract

The invention discloses a video transmission method, device and system, and relates to the technical field of wireless network transmission. The video transmission method, device and system can ensure the video quality of a receiving terminal and in addition improve the video quality. The method disclosed by the invention comprises the steps as follows: using SVCs to process source video data by a sending terminal to obtain video streams in a multilayer structure; obtaining the channel quality of each sub-channel in a multi-antenna system; scheduling video streams at different layers in the video streams in the multilayer structure to different sub-channels in accordance with the principle of scheduling video streams with higher importance to sub-channels with better channel quality according to the channel quality of each sub-channel; selecting a corresponding modulation mode with the largest throughput for different sub-channels according to the channel quality of different sub-channels; and modulating the video streams on different sub-channels according to the respective modulation modes of different sub-channels, and sending the modulated video streams on different sub-channels to the receiving terminal at the same time. The embodiment of the invention is mainly used in a video transmission process.

Description

technical field [0001] The present invention relates to the technical field of wireless network transmission, in particular to a video transmission method, device and system. Background technique [0002] With the development of a new generation of scalable video compression standards, and the continuous improvement of computing and storage capabilities of wireless devices, there are more and more applications for video transmission based on wireless networks. However, the time-varying characteristics, high bit error rate and low bandwidth of wireless channels seriously limit and affect the quality of video at the receiving end. The proposal of the multiple-input multiple-output (MIMO) technology has alleviated this problem to a large extent. In the MIMO system, both the transmitting end and the receiving end have multiple antennas, which can transmit and receive data independently. Each transceiver antenna pair is regarded as multiple parallel spatial sub-channels, and di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/2385
Inventor 周超张行功郭宗明
Owner PEKING UNIV