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Screen content coding inter-frame fast algorithm based on rate distortion cost

A technology of screen content coding and rate-distortion cost, applied in the field of video coding and decoding, can solve the problems of consideration, less coding time, temporal and spatial correlation considerations, etc., to achieve the effect of reducing complexity and reducing traversal

Active Publication Date: 2019-02-01
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

However, the above algorithm reduces the encoding time for animation test sequences less, and lacks the consideration of the rate distortion cost (RateDistortion, RD) of the screen content, and does not consider the correlation between the time domain and the space domain.

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  • Screen content coding inter-frame fast algorithm based on rate distortion cost
  • Screen content coding inter-frame fast algorithm based on rate distortion cost
  • Screen content coding inter-frame fast algorithm based on rate distortion cost

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Embodiment Construction

[0037] In order to express the object, technical solution and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation cases.

[0038] figure 1 The present invention provides a fast algorithm between SCC frames based on rate-distortion cost, such as figure 1 , the algorithm includes the following steps: S1. Perform inter-frame prediction of the current coding unit CU, and select the maximum depth value Depth according to the depth value and the rate-distortion cost value of the CU adjacent to the current CU max and the minimum depth value Depth min , calculate the first average rate-distortion cost value RD_refavg of all CUs adjacent to the current CU;

[0039] S2. Setting the first threshold Tr based on the quantization parameter QP 1 and the second threshold Tr 2 , and set Dpre0 and Dpre1 as the CU depth of the same position in the first two ...

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Abstract

The invention relates to the technical field of video coding and decoding, in particular to an SCC inter-frame fast algorithm based on rate distortion cost. The algorithm comprises the following stepsof firstly, predicting whether a current coding unit needs to be divided according to depth information of the adjacent coding unit in the time-space domain and average rate distortion cost of the adjacent coding unit in order to carry out early decision on division of the coding unit to reduce unnecessary traversing; and secondly, carrying out early termination on a prediction unit mode selection process according to an average rate distortion cost value with a merge mode as the optimal prediction unit mode. According to the algorithm, the coding complexity is effectively reduced under a condition that the objective quality is almost unchanged.

Description

technical field [0001] The present invention relates to the technical field of video coding and decoding, in particular to a fast inter-frame algorithm of Screen Content Coding (Screen Content coding, SCC) based on rate-distortion cost. Background technique [0002] With the rise of the mobile Internet, screen content coding has received widespread attention. The screen content is different from the content captured by traditional cameras, with a large number of repetitive patterns, a limited number of color types, sharp edges, and no sensor noise. Therefore, the existing High Efficiency Video Coding (HEVC) standard has been unable to meet the compression requirements of screen content video. In order to further improve the performance of screen content compression, the International Telecommunication Union-Telecommunication Standardization Sector (ITU-T ) and the International Organization for Standardization / International Electrotechnical Commission (InternationalOrganiza...

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Application Information

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IPC IPC(8): H04N19/147H04N19/186H04N19/124H04N19/19H04N19/119
CPCH04N19/119H04N19/124H04N19/147H04N19/186H04N19/19
Inventor 黄胜肖傲张盛峰付园鹏李萌芳
Owner CHONGQING UNIV OF POSTS & TELECOMM
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