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Method and device for encoding and decoding video frames

An encoding method and video frame technology, applied in the direction of digital video signal modification, image communication, electrical components, etc., can solve the problems of affecting video quality, low encoding efficiency, and low video compression ratio.

Active Publication Date: 2018-12-14
LENOVO (BEIJING) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the proposal of Mode_INTRABC has improved the compression ratio of video frames to a certain extent, the current coding of video frames based on Mode_INTRABC mode still has the problems of low video compression ratio and low coding efficiency, which in turn affects the subsequent decoded video quality.

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  • Method and device for encoding and decoding video frames
  • Method and device for encoding and decoding video frames
  • Method and device for encoding and decoding video frames

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Embodiment Construction

[0082] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0083] The embodiment of the present application discloses a video frame encoding and decoding method and device, so as to reduce the bit rate in the encoding process, increase the compression ratio, and further improve the quality of the decoded video.

[0084] Firstly, a video frame coding method will be introduced below.

[0085] see figure 1 , which shows a schematic flowchart of an embodiment of a video frame encoding method of the present application, the method of this embod...

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Abstract

The present application provides a method and device for encoding and decoding video frames, comprising: by using motion vectors of at least one selected encoding unit and a current encoding unit assigned with an initial value as the motion vector of the current encoding unit, successively computing a residual according to a reconstruction value or an initial value of a reference encoding unit to which the motion vector points and the original value of the current encoding unit; pre-encoding according to the residual, and encoding according to an index number of an optimal candidate unit determined by the pre-encoding result and the residual corresponding to the optimal candidate unit; when decoding, parsing the residual and index number corresponding to the current encoding unit; using the motion vector of the candidate unit acquired according to the index number as the motion vector of the current encoding unit; and according to the reference encoding unit to which the determined motion vector points and the residual, constructing the reconstruction value of the current encoding unit. The method and device in the present application can increase encoding compression ratio and encoding efficiency and improve quality of decoded videos.

Description

technical field [0001] The present application relates to the technical field of video compression, and more specifically relates to a method and device for encoding and decoding video frames. Background technique [0002] Before the video data is transmitted, it is generally necessary to compress and encode the video data. In the current video coding standard, the original video frame is divided into: intra-frame coding frame, also known as I frame (Intra-frame); unidirectional predictive frame, also known as P frame (Predictive-frame); and bidirectional predictive frame , also known as B frame (Bidirectionally predicted-frame) three types. [0003] In order to improve the compression ratio of these three kinds of video frames, the intra-frame block copy coding mode (Mode_INTRABC, Mode_Intra Block Copy) is proposed, that is, when the video frame is coded, it is also allowed to find a match in its adjacent area for the current coded block piece. Although the proposal of M...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/513H04N19/85
Inventor 姜东张学荣武亚强
Owner LENOVO (BEIJING) LTD
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