A video encoding method and device

A technology of video coding and coding quantization, applied in the multimedia field, can solve the problems of differences in visual perception, unreasonable occupation of coding resources, and inability to achieve optimal subjective video quality, so as to reduce the occupation of bandwidth and make full use of it.

Active Publication Date: 2016-12-14
CHINA MOBILE COMM GRP CO LTD
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Problems solved by technology

[0004] Due to the difference in video content and encoding characteristics of the signal itself, the same encoding parameters sometimes lead to large visual perception differences. The subjective quality of the video is not only not optimal, but also the encoding resources are unreasonably occupied under the same bandwidth conditions. Case

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  • A video encoding method and device
  • A video encoding method and device
  • A video encoding method and device

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Experimental program
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Embodiment 1

[0053] This embodiment provides a video encoding method. In this method, the video data is clustered into multiple area types based on the sensitivity parameters of each macroblock in the video data, and then the area type is calculated according to the divided area types. Encoding quantization parameters, so as to achieve the effect of using different encoding methods for different area types and reducing bandwidth occupation. In particular, in this embodiment, the sensitivity parameter is calculated according to the brightness parameter and the texture parameter in the content characteristics of the video data. In order to facilitate the understanding of this embodiment, the following will first explain why in this embodiment, the sensitivity parameters obtained by texture parameters and brightness parameters can finally be obtained while improving subjective visual experience, reducing bandwidth occupancy, and rationally using encoding. Principles of resource technical effe...

Embodiment 2

[0101] This embodiment provides a video encoding device. The video encoding device may be deployed on the video encoder in Embodiment 1 to implement the method in Embodiment 1, and may also be a video encoder. Such as Figure 5 As shown, it includes: an analysis unit 41 , a sensitivity acquisition unit 42 , a calculation unit 43 , and an encoding unit 44 .

[0102]The analysis unit 41 is used to analyze the content characteristics of each macroblock in the received frame of video data, and the content characteristics include brightness parameters and texture parameters; the sensitivity acquisition unit 42 is used to obtain each macroblock according to the content characteristics. A sensitivity parameter of the macroblock; a calculation unit 43, configured to calculate an encoding quantization parameter according to the sensitivity parameter; an encoding unit 44, configured to encode the one frame of video data according to the encoding quantization parameter.

[0103] Wherein...

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Abstract

The invention discloses a video coding method and apparatus to solve the technical problem that in the prior art, coding resources are unreasonably utilized caused by using the same coding parameters to code, and relates to the field of multimedia technology. The method mainly comprises: analyzing content features of each macroblock in a frame of received video data, wherein the content features comprise a luminance parameter and a texture parameter; obtaining a sensitivity parameter of each macroblock based on the content features; calculating a code quantization parameter based on the sensitivity parameter; and coding the frame of video data based on the code quantization parameter. Embodiments of the invention are mainly used for coding a video frame.

Description

technical field [0001] The present invention relates to the field of multimedia technology, in particular to a video encoding method and device. Background technique [0002] The vigorous application range of digital video is getting wider and wider. Video coding efficiency is the core of video applications, and one of the directions that needs to be improved is how to improve the video quality as much as possible under the condition of limited bandwidth. Since the video signal is a special kind of signal source, its characteristic is to convey visual content information to people. Therefore, in the process of video encoding, due to the limitation of bandwidth and storage space, video signal distortion will inevitably be introduced. So how to reduce image distortion as much as possible and improve image quality under the same bandwidth conditions is the core issue of video coding work in the industry. [0003] Existing video coding technologies usually use the same coding...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/154H04N19/124H04N19/176H04N19/42
Inventor 俞力克程亮刘越
Owner CHINA MOBILE COMM GRP CO LTD
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