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Background frame code rate control method and device

A bit rate control and background frame technology, applied in the field of digital video encoding and decoding, can solve the problem of sudden increase in the instantaneous bit rate, and achieve the effect of solving the sudden increase in the instantaneous bit rate and ensuring the reference value.

Inactive Publication Date: 2019-05-24
BEIJING INSTITUTE OF TECHNOLOGYGY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Embodiments of the present invention provide a background frame code rate control method and device, which effectively solves the problem of instantaneous code rate sudden increase in the video transmission process, and ensures the reference value of the background frame as much as possible

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  • Background frame code rate control method and device
  • Background frame code rate control method and device
  • Background frame code rate control method and device

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Embodiment 1

[0061] Such as figure 1 Shown, be the rate control method of a kind of background frame of the present invention, comprising:

[0062] Step 11, determine the prediction reference value of different areas of the background frame to be encoded, the prediction reference value is the reference value of the normal frame to be encoded in different areas of the background frame to be encoded during inter-frame prediction;

[0063] Step 12, according to the prediction reference value, setting the importance levels of different regions of the background frame to be coded;

[0064] Step 13, adjusting the coding quality of different regions of the background frame to be coded according to the importance levels of the different regions.

[0065] The present invention effectively solves the problem of instantaneous code rate sudden increase in the video transmission process by changing the encoding quality of different reference value areas of the background frame, and ensures the referen...

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Abstract

An embodiment of the invention provides a background frame code rate control method and device. The method includes judging predication reference values of different zones of a to-be-coded background frame, wherein the predication reference values are predicated reference values of different zones of the to-be-coded background frame to a to-be-coded common frame during inter-frame prediction; according to the predication reference values, setting the importance levels of the different zones of the to-be-coded background frame; according to the importance levels of the different zones, adjusting the coding quality of the different zones of the to-be-coded background frame. According to the invention, through changing the coding quality of the zones with different reference values of the background frame, a problem of instantaneous code rate surge in a video transmission process is solved effectively and the reference value of the background frame is ensured to the best.

Description

technical field [0001] The present invention relates to the technical field of encoding and decoding of digital video, in particular to a method and device for controlling the code rate of background frames. Background technique [0002] In recent years, a variety of surveillance video coding methods based on background modeling have been proposed, which can effectively reduce the background redundancy of video coding and significantly improve the coding performance. In order to make the background frame a better predictive reference for subsequent frame coding, the modeled background frame is often coded into the code stream with higher quality. Therefore, the number of bits of the background frame is significantly larger than that of the ordinary coded frame, resulting in a sudden increase in the bit rate, buffer overflow, and the reconstruction of the background frame cannot be referenced. [0003] In actual video coding applications, it is necessary to control the bit r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/61H04N19/96H04N19/19H04N19/172
CPCH04N19/172H04N19/19H04N19/61H04N19/96
Inventor 王耀威张玉梅董思维田永鸿黄铁军
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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