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Coding method for reducing code rate and corresponding decoding method

A technology of encoding method and decoding method, applied in the direction of digital video signal modification, electrical components, image communication, etc., can solve the problems of hindering encoding compression efficiency, not too large, and low I frame compression efficiency, so as to reduce transmission costs and reduce The effect of storage cost and optimal compression ratio

Pending Publication Date: 2022-04-12
HANGZHOU ARCVIDEO TECHNOLOGY CO LTD
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Problems solved by technology

Due to the same image quality, the compression efficiency of I frames is low, and the interval of I frames, that is, the number of GOP frames, cannot be too large, which will seriously hinder the encoding and compression efficiency

Method used

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Embodiment Construction

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the embodiments of the present invention. Apparently, the described embodiments are part of the embodiments of the present invention, but not all of them. 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.

[0038] The encoding method for reducing the code rate of the embodiment of the present invention includes the following steps:

[0039] When video encoding is started, first set the GOP size to N, and set the number of ordinary I frame cycles to M at the same time. In every M consecutive GOPs, the first frame of the first GOP is an ordinary I frame, and the first frame of the remaining GOPs is an ordinary I frame. The frame is an enhanced SI frame, and each SI frame includ...

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Abstract

The invention discloses a coding method capable of reducing code rate and a corresponding decoding method, and the coding method capable of reducing code rate comprises the following steps: when video coding is started, the size of GOP is set to be N, the period number of common I frames is set to be M, in every M continuous GOP, the first frame of the first GOP is a common I frame, and the first frames of the other GOP are enhanced SI frames, each SI frame comprises a basic I frame and a supplementary frame, and the supplementary frame is obtained by encoding the basic I frame and an original frame and using inter-frame prediction; when an nth frame (n = 1, 2, 3...) is input, the frame type of the frame code is firstly judged, and when n is an integral multiple of N, the frame code is a common I frame or SI frame; when a common I frame is coded, a normal coding method is used; and when the SI frame is coded, the SI frame coding method is adopted.

Description

technical field [0001] The invention belongs to the technical field of video coding, and in particular relates to a coding and decoding method for reducing code rate. Background technique [0002] Currently popular video coding standards, such as international video standards H.264, H265, and domestic video standards AVS2, AVS3, etc., their video compression principles are similar, and are based on removing intra-frame and inter-frame redundant information. Transformation, quantization processing, and finally entropy coding. Whether the compression rate is high depends to a certain extent on whether the redundant information is completely removed. [0003] Video is composed of several consecutive images, and each image is coded and compressed into one frame. The encoder encodes a plurality of consecutive images to generate a group of pictures (Group of Pictures, GOP) one by one. A GOP consists of an I frame and several B / P frames, and is a frame set that video images can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/159H04N19/177H04N19/124H04N19/172
Inventor 谢亚光廖义李日周瑜锋朱建国
Owner HANGZHOU ARCVIDEO TECHNOLOGY CO LTD
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