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Method for controlling code rate of secondary AVS encoding of video signal

A technology of video signal and coding bit rate, applied in the direction of digital video signal modification, pulse modulation TV signal transmission, TV, etc., can solve the problem of no record and so on

Inactive Publication Date: 2009-09-30
NINGBO UNIV
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Problems solved by technology

However, there is no record of the application of AVS in video storage using the above-mentioned classic secondary encoding rate control method.

Method used

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  • Method for controlling code rate of secondary AVS encoding of video signal
  • Method for controlling code rate of secondary AVS encoding of video signal
  • Method for controlling code rate of secondary AVS encoding of video signal

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Embodiment Construction

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0033] The image quality evaluation method can be used to evaluate the quality of the image and the quality of the bit rate control method, thereby guiding the development of the bit rate control method. Therefore, in the field of image processing, image quality evaluation is very important.

[0034] At present, the commonly used objective evaluation methods of video quality include Mean Square Error (MSE, Mean Square Error), Peak Signal to Noise Ratio (PSNR, Peak Signal to Noise Ratio) or the deformation of MSE. The visual characteristics of the human eye are not fully considered, resulting in inconsistencies between the objective evaluation results and the visual effects. Therefore, it has been the research pursuit to study the objective evaluation method of video quality based on the Human Visual System (HVS) and consistent with the subjecti...

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Abstract

The invention discloses a method for controlling code rate of secondary AVS encoding of a video signal, which has the advantages of: more according with an SSIM value of a human eye system by performing detailed statistic and record of important encoding information of the video signal in primary encoding in light of the analysis of the important characteristics of AVS encoding; analyzing the video characteristics, such as complexity, of each scene and each frame according to the statistic data during data processing, and effectively reregulating the total number of bits and distributing the bits to each frame on the premise of meeting a VBR code rate and a buffer underflow limit; and calculating a quantization parameter according to an R-D model and properly and slightly regulating the quantization parameter in secondary encoding. The method can ensure total bit number estimation and the buffer limit, can achieve constant video quality with extremely small SSIM and PSNR fluctuation, is incomparable to a single code rate control method, and solves the contradiction between video quality and total storage space in the field of video storage and application.

Description

technical field [0001] The invention relates to a code rate control method of a video signal, in particular to a method for controlling the code rate of a secondary AVS encoding video signal. Background technique [0002] AVS (Audio Video coding Standard, digital audio and video coding standard) is China's first second-generation digital audio and video coding standard with independent intellectual property rights. The full name is "Advanced Audio and Video Coding Standard for Information Technology". Its coding Efficiency and competitiveness are equivalent to the international standard MPEG-4 / H.264, representing the current international advanced level. [0003] Bit rate control is an important part of video coding, especially in video transmission, video storage and other application fields. Rate control directly affects the performance of video coding, and developing appropriate rate control methods for specific application requirements is an important research direction...

Claims

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Application Information

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IPC IPC(8): H04N7/24H04N7/26H04N19/124H04N19/15
Inventor 李均利郑从卓魏平陈刚
Owner NINGBO UNIV
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