Visual analysis-oriented code rate control method and device, storage medium and terminal
A technology of visual analysis and bit rate control, applied in the fields of digital video signal modification, image communication, electrical components, etc., can solve the problems of image feature distortion, visual analysis performance decline, and visual analysis accuracy, etc., to improve the accuracy, The effect of saving bit rate
Active Publication Date: 2021-03-02
PEKING UNIV
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Problems solved by technology
Coding compression will lead to distortion of image features, which will reduce the performance of visual analysis. However, traditional coding does not consider visual analysis distortion when solving rate-distortion optimization problems, so it is difficult to achieve the best bit rate-visual analysis coding performance, resulting in reduced visual analysis. accuracy of analysis
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[0060] The following description and drawings illustrate specific embodiments of the invention sufficiently to enable those skilled in the art to practice them.
[0061] It should be clear that the described embodiments are only some of the embodiments of the present invention, 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 creative efforts fall within the protection scope of the present invention.
[0062] When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with aspects of the invention as recited in the appended claims.
[0063] In the descriptio...
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The invention discloses a visual analysis-oriented code rate control method and device, a storage medium and a terminal, and the method comprises the steps: determining a target code rate before videocoding; sequentially inputting the target code rate into a pre-created R lambda model based on a code rate joint distortion model, and generating a Lagrange multiplier lambda corresponding to the target code rate; inputting the Lagrange multiplier lambda corresponding to the target code rate into a pre-created lambda QP model based on a code rate joint distortion model, and generating a quantization parameter QP corresponding to the target code rate; and setting the quantization parameter QP as a coding quantization parameter to finish coding of code rate control. Therefore, by adopting the embodiment of the invention, only the encoder end needs to be changed, the change amount is relatively small, and the decoder end does not need to be changed, so that the deployability is relatively good, the code rate is saved, and the accuracy of visual analysis is improved.
Description
technical field [0001] The invention relates to the field of digital signal processing, in particular to a code rate control method, device, storage medium and terminal for visual analysis. Background technique [0002] Video coding is a data compression method for digital video, the goal is to remove redundancy in the original video image and save storage and transmission costs. Video is generally used for human viewing, so traditional video coding mainly optimizes the subjective and objective quality of human vision of video images at the same bit rate. [0003] Now more and more video images are used in various machine vision analysis tasks, such as object detection, pose estimation, etc. Coding and compression will lead to distortion of image features, thereby reducing the performance of visual analysis. However, traditional coding does not consider visual analysis distortion when solving rate-distortion optimization problems, so it is difficult to achieve the best bit ...
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IPC IPC(8): H04N19/124H04N19/147H04N19/184H04N19/70
CPCH04N19/124H04N19/147H04N19/184H04N19/70
Inventor 马思伟张启王苫社
Owner PEKING UNIV