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Video coding reference frame selection method and apparatus

A video coding and reference frame technology, applied in the field of video coding, to achieve the effects of improving compression efficiency, saving bandwidth resources, and improving coding efficiency

Active Publication Date: 2017-01-04
BEIJING QIYI CENTURY SCI & TECH CO LTD
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  • Application Information

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Problems solved by technology

[0004] Embodiments of the present invention provide a method and device for selecting a reference frame for video coding, which are used to solve the defect of selecting a fixed reference frame for video coding in the prior art, and realize adaptive selection of a reference frame for video coding

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  • Video coding reference frame selection method and apparatus
  • Video coding reference frame selection method and apparatus

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Embodiment Construction

[0035] 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 a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0036] refer to figure 1 , shows a flow chart of steps of a method for selecting a video coding reference frame according to an embodiment of the present invention.

[0037] The method of the present embodiment comprises the following steps:

[0038] Step 101: Acquire the absolute value sequence of the time domain distance between the current im...

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Abstract

The invention provides a video coding reference frame selection method and apparatus. The method includes respectively acquiring the time domain distance absolute value sequence and quantization parameter sequence between the current image and a previous image; respectively constructing a time domain distance weighting table and a quantification parameter weighting table; overlapping the time domain distance weighting table and the quantification parameter weighting table, sequencing from big to small, and selecting the image corresponding to the maximum value as the reference image of the current image. The video coding reference frame selection method and apparatus realize the self-adaptive selection of the reference image in the video image coding process, thereby improving the coding efficiency and the compression efficiency, and saving the bandwidth source.

Description

technical field [0001] The present invention relates to the technical field of video coding, in particular to a method and device for selecting a video coding reference frame. Background technique [0002] With the development of video playback requirements, the requirements for video encoding technology are getting higher and higher. Currently, in video coding standards, the reference frame selection method is relatively simple. For example, in H.264 and H.265, the reference frame structure is usually fixed, that is, the reference frame of an image at a specific time has been determined before encoding. Or it can be explicitly selected through a reference frame selection algorithm, that is, some bits are coded in the image header of the current image to explicitly select its reference image frame. This method first needs to encode certain bits to explicitly select a reference image. In addition, this algorithm does not have a clear criterion for selecting a reference image...

Claims

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Application Information

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IPC IPC(8): H04N21/2343H04N19/157H04N19/124H04N19/172H04N19/192
CPCH04N19/124H04N19/157H04N19/172H04N19/192H04N21/234381
Inventor 朱洪波
Owner BEIJING QIYI CENTURY SCI & TECH CO LTD
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