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A Fast Inter-Frame Coding Method for Screen Content Coding 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 less coding time, consideration, temporal and spatial correlation considerations, etc., and achieve the effect of reducing traversal and complexity.

Active Publication Date: 2021-09-28
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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  • A Fast Inter-Frame Coding Method for Screen Content Coding Based on Rate-Distortion Cost
  • A Fast Inter-Frame Coding Method for Screen Content Coding Based on Rate-Distortion Cost
  • A Fast Inter-Frame Coding Method for Screen Content Coding 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 rate-distortion cost-based SCC inter-frame fast coding method, 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 fr...

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Abstract

The present invention relates to the technical field of video coding and decoding, and in particular to a rate-distortion cost-based SCC inter-frame fast coding method, including: firstly, predicting the current Whether the coding unit needs to be divided, so as to make an early decision on the division of the coding unit to reduce unnecessary traversal; secondly, according to the average rate-distortion cost of the optimal prediction unit mode as the merge mode, the early termination of the selection process of the prediction unit mode; The present invention effectively reduces the coding complexity under the 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 rate-distortion cost-based fast coding method for screen content coding (Screen Content coding, SCC) between frames. 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 can no longer 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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Patent Type & Authority Patents(China)
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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