HDR and SDR self-adaptive code rate control method

An adaptive code rate and code rate control technology, applied in the field of video coding, can solve the problem of reducing data volume, etc., and achieve the effects of reducing code rate overhead, improving subjective quality, and reducing block effects

Active Publication Date: 2017-06-13
HANGZHOU ARCVIDEO TECHNOLOGY CO LTD
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Problems solved by technology

[0004] In the process of video encoding, HDR video needs to express more details than SDR video, and HDR video encoding needs to consume more bit rate than SDR video encoding in many detail areas. Mode switching to SDR mode to reduce the amount of data, or switching from SDR mode to HDR mode to improve viewing quality has become a necessary way. Existing video coding does not have a method for bit rate control for switching between HDR mode and SDR mode

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  • HDR and SDR self-adaptive code rate control method
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  • HDR and SDR self-adaptive code rate control method

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[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is only some embodiments of the present invention, but not all embodiments.

[0039] Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0040] In the field of live video broadcasting, live video streaming is usually divided into four steps:

[0041] The first step is to capture and collect a video data source with several frames of images;

[0042] The second step is to encode and compress the video data source to reduce the data bandwidth;

[0043] The third step ...

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Abstract

The invention relates to an HDR and SDR self-adaptive code rate control method comprising the steps of judging whether an Meta Data code in an HDR video coding data of an HDR video coder changes; if yes, converting an HDR video code into an SDR video code or converting the SDR video code into the HDR video code; and if no, judging that a video in the current HDR video coder is an HDR video, and performing HDR video coding by the HDR video coder. According to the method provided by the invention, changing situations of a brightness rage and a chroma format of the video are firstly detected, scene change in the video is judged, mutual change of HDR and SDR is performed, and a distributed target code rate is adjusted, so that details in an highlight area and a black area in the HDR are more completely stored, meanwhile unnecessary code rate overhead in the SDR is reduced, and subjective code quality is improved; furthermore, the target code rate is adjusted at the area with large brightness change in the HDR code, and thus great quality improvement is achieved in partial areas.

Description

technical field [0001] The invention relates to the technical field of video coding, in particular to a method for adaptive code rate control of HDR and SDR. Background technique [0002] With the continuous maturity of network technology and the rapid development of video image technology, people's demand for video services is also increasing. Video services have been widely used in mobile terminals, webcasts, home theaters and remote monitoring fields. Video resolution Gradually transform from standard definition (SD) to high definition (HD) and ultra high definition (UHD). The improvement of resolution means that the requirements for network bandwidth are also getting higher and higher. Improving video coding compression efficiency and reducing network bandwidth pressure is the development of video technology. a key to At the same time, people's demand for video viewing is also increasing, and HDR (High Dynamic Range, high dynamic range) has gradually become a hot spot i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/114H04N19/146H04N19/177H04N19/186
CPCH04N19/114H04N19/146H04N19/177H04N19/186
Inventor 廖义王建伟黄进
Owner HANGZHOU ARCVIDEO TECHNOLOGY CO LTD
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