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Low code rate video coding method and system

A video coding and low bit rate technology, applied in the field of video coding and decoding, can solve the problem of low quality in visually sensitive areas of images

Inactive Publication Date: 2017-01-04
北京中传视讯科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to propose a low-bit-rate video coding method and system, aiming to solve the problem of low quality of image visually sensitive areas when compressing complex film sources at low bit-rates in the prior art

Method used

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  • Low code rate video coding method and system
  • Low code rate video coding method and system

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Embodiment 1

[0091] figure 1 It is a flow chart of a low bit rate video coding method in a preferred embodiment of the present invention; the method includes the following steps:

[0092] StepO: If bpp1 , enter Step1; otherwise, perform conventional encoding on the current source.

[0093] in, T_bit indicates the target bit rate, width, height, and fps respectively indicate the number of pixel columns, pixel rows, and sampling frame rate of the source image; Thres 1 Indicates the first decision threshold, usually Thres 1 ≤0.1.

[0094] Step1: If the current frame is I or QP t 2 , perform conventional encoding on the current frame, and then enter Step3; otherwise, enter Step2.

[0095] Among them, QP t Indicates the quantization parameter of the current frame; Thres 2 Indicates the second decision threshold, usually Thres 2 <32.

[0096] Step2: Perform limited mode encoding on the current frame.

[0097] figure 2 yes figure 1 Carry out limited mode encoding method flow chart t...

Embodiment 2

[0122] Figure 5 It is a structural diagram of a low-bit-rate video coding system in a preferred embodiment of the present invention; the system includes a first judgment processing module, a first conventional coding module, a second judgment processing module, a second conventional coding module, and next coding frame judgment processing module, the next encoded frame sets the module.

[0123] The first judgment processing module is used to judge if bpp1 , then enter the second judgment processing module; otherwise, enter the first normal encoding module.

[0124] in, T_bit indicates the target bit rate, width, height, and fps respectively indicate the number of pixel columns, pixel rows, and sampling frame rate of the source image; Thres 1 Indicates the first decision threshold, usually Thres 1 ≤0.1.

[0125] The first conventional encoding module is used to perform conventional encoding on the current film source, end;

[0126] The second judging processing module is...

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Abstract

The invention discloses low code rate video coding method and system. The low code rate video coding system comprises a first determination processing module, a first regular coding module, a second determination processing module, a second regular coding module, a next coding frame determination processing module and a next coding frame setting module. The low code rate video coding method monitors a visual sensitive area of a film source image, can perform timely regulation, can limit a coding mode of the area, and can improve subjective and objective quality of video compression when the complicate film source is compressed with a low code rate.

Description

technical field [0001] The present invention relates to the field of video coding and decoding, in particular to a low bit rate video coding method and system. Background technique [0002] Due to the insufficient overall bit rate of low bit rate video compression, when it encodes a complex source, the image quality will drop sharply. Among them, compared with the sensitive areas of the human eye, this kind of quality deterioration will bring extreme visual discomfort. Contents of the invention [0003] The purpose of the present invention is to propose a low-bit-rate video coding method and system, aiming to solve the problem of low quality of visually sensitive areas of images when low-bit-rate compressed complex film sources in the prior art. [0004] Technical scheme of the present invention is realized in that way, [0005] A low bit rate video encoding method, comprising the following steps: [0006] Step A: Determine if bpp<Thres 1 , enter step B; otherwise, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/103H04N19/147
Inventor 洪婷
Owner 北京中传视讯科技有限公司
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