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Ultra-low time delay H.264 coding method and coder

A technology of ultra-low delay and coding method, which is applied in the fields of digital video signal modification, electrical components, image communication, etc., can solve the problem that the delay cannot meet the requirements, meet the ultra-low delay requirements, reduce the pre-storage time, reduce the The effect of encoding delay

Inactive Publication Date: 2015-07-08
四川正冠科技有限公司
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Problems solved by technology

[0004] However, there are delays in existing video transmissions, including encoding delays, transmission delays, and decoding delays, among which encoding delays account for a large part of transmission delays
At present, the delay of most video encoding is more than 200 milliseconds. For the above specific applications, the delay cannot meet the requirements.

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  • Ultra-low time delay H.264 coding method and coder

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Embodiment Construction

[0043] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0044] Any feature disclosed in this specification, unless specifically stated, can be replaced by other alternative features that are equivalent or have similar purposes. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0045] The traditional H.264 encoding delay is usually expressed in frames, such as the time when a complete frame must be buffered before compression starts. Assuming the encoding speed can be increased, the encoding latency can be reduced simply by doubling the frame rate, i.e. 33ms per frame at 30fps and 16.5ms per frame at 60fps .

[0046] However, such low latency still cannot meet the requirements for ultra-low latency in some specific occasions.

[0047] The present invention optimizes the f...

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Abstract

The invention discloses an ultra-low time delay H.264 coding method and coder, and relates to the field of video signal coding. According to the technical scheme, the ultra-low time delay H.264 coding method comprises the steps of preprocessing input video, conducting cache on multiple video lines in the preprocessed video, conducting frame prediction on the multiple video lines, conducting DCT coding and quantization on frame prediction results in sequence, conducting entropy coding on a quantization result and a motion vector, outputting the result of the entropy coding after the result is buffered and the like.

Description

technical field [0001] The present invention relates to video signal coding technology, especially a kind of H.264 coding technology. Background technique [0002] In highly interactive network video chat or video conference, video delay is a key system performance quality indicator. If the video delay is too large, it will seriously affect the user's communication experience. [0003] In addition, in the field of UAV control, the existing UAV control is based on the streaming media image sent back by the remote control device as a feedback signal. To control a drone, the latency between when the sensor sends video to the compression engine and when the decoded image is displayed is typically less than 100 milliseconds. [0004] However, existing video transmissions all have delays, including encoding delays, transmission delays, and decoding delays, among which encoding delays account for a large part of transmission delays. At present, the time delay of most video codin...

Claims

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Application Information

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IPC IPC(8): H04N19/61
Inventor 陈庆何川吴海军董光利陈程
Owner 四川正冠科技有限公司
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