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HEVC quantization parameter optimizing method based on total code rate and information entropy model

A technology for quantizing parameters and optimizing methods, which is used in image communication, digital video signal modification, electrical components, etc.

Active Publication Date: 2014-12-03
福州视驰科技有限公司
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Problems solved by technology

In fact, for video sequences with different contents, these two parameters should be adaptively valued, and the fixed value method used in the encoding process obviously has certain limitations

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  • HEVC quantization parameter optimizing method based on total code rate and information entropy model
  • HEVC quantization parameter optimizing method based on total code rate and information entropy model
  • HEVC quantization parameter optimizing method based on total code rate and information entropy model

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Embodiment Construction

[0031] The technical solutions involved in the patent of the present invention are set forth below in conjunction with the accompanying drawings and design principles.

[0032] In HEVC, the total code rate after encoding is the sum of the residual information entropy and the side information code rate. Therefore, in addition to the residual information, the side information also has a greater impact on the total code rate, especially at low code rates. When the bit rate is high, the quantization step size is usually Relatively small, the total code rate R is relatively close to the residual code rate H; while at low code rates, the quantization step size If the value is relatively large, the difference between the total code rate R and the residual code rate H is relatively large, and the side information code rate is relatively significant at this time.

[0033] Transformed residuals usually follow a zero-mean Laplace distribution, assuming is the Laplace distribution pa...

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Abstract

The invention relates to an HEVC quantization parameter optimizing method based on a total code rate and information entropy model. The total code rate and information entropy model is used in the code rate control process to adjust the quantization parameters (QP)s in the HEVC coding process according to different sequence characters of different videos, the purposes of improving the rate-distortion performance and controlling the code rate more accurately are achieved, and the coding complexity cannot be obviously affected. The quantization parameter optimizing method is also suitable for calculating the QPs of H.264 / AVC, AVC and other video coding standards.

Description

technical field [0001] The patent of the present invention relates to a quantization parameter optimization method based on the H.265 / MPEG-H HEVC (High Efficiency Video Coding) video coding standard, in particular to a precise correction method for the video coding rate control process. Background technique [0002] In video coding and transmission applications, the new generation of high-performance video coding standard H.265 / MPEG-H HEVC (High Efficiency Video Coding) is a video coding standard established by two international standardization organizations, ISO-IEC / MPEG and ITU-T / VCEG. Developed by the Joint Development Team (JCT-VC), compared with H.264 / AVC, HEVC can reduce the bit rate by half at the same visual quality. [0003] As a new-generation video coding standard, HEVC still belongs to the hybrid coding framework of prediction and transformation. It also includes coding modules such as intra prediction, inter prediction, orthogonal transformation, quantization, f...

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Application Information

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IPC IPC(8): H04N19/124H04N19/147H04N19/19H04N19/142
Inventor 郑明魁苏凯雄杨秀芝兰诚栋黄博
Owner 福州视驰科技有限公司
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