Efficient video coding zero-coefficient early detection method

A high-efficiency video coding and detection method technology, applied in the field of high-efficiency video coding zero coefficient early detection, can solve problems such as huge computational complexity

Active Publication Date: 2014-05-14
TONGJI UNIV
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Problems solved by technology

[0004] Although the compression efficiency of HEVC has been greatl...

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  • Efficient video coding zero-coefficient early detection method
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  • Efficient video coding zero-coefficient early detection method

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Embodiment Construction

[0027] The present invention will be described in detail below in conjunction with specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0028] In HEVC, for a 4×4 residual block e(x, y), its two-dimensional DCT transformation can be written as follows:

[0029] F ( u , v ) = { Σ x = 0 3 C ( u , x ) · [ ( Σ y = 0 ...

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Abstract

The invention relates to an efficient video coding zero-coefficient early detection method. The method includes the steps that firstly, a quantization parameter Qp, a two-dimensional DCT transformation matrix C, a residual matrix Re and the size N of a TU block are set; secondly, a zero block detection threshold value is worked out according to the Qp, the C, the Re and the N; thirdly, a detection parameter SAD corresponding to the TU block with the size of N is worked out; fourthly, for the TU block with the size of N, whether the SAD meets the inequation SAD<Th0 or not is judged, if yes, it is determined that the TU block is an all-zero block and the third step is executed again, and otherwise the fifth step is executed; fifthly, whether the SAD can meet the inequation SAD<Thj, j=1,2,...,N-1 or not is judged, if yes, a final quantization block from Z(0,0) to Z(j-1,j-1) with the size of j*j is subjected to DCT, quantization, inverse quantization and inverse DCT operation and the third step is executed again, and otherwise the total TU block is subjected to DCT, quantization, inverse quantization and inverse DCT operation and the third step is executed again. Compared with the prior art, the efficient video coding zero-coefficient early detection method has the advantages of being capable of improving video coding speed and reducing coding calculation complexity, high in detection efficiency and the like.

Description

technical field [0001] The invention relates to a video coding method, in particular to a high-efficiency video coding zero coefficient early detection method. Background technique [0002] With people's ever-increasing demand for multimedia entertainment, the popularity of high-definition video and the emergence of ultra-high-definition video have led to higher requirements for coding efficiency, which cannot be met by the current video coding standard H.264 / AVC . To this end, the Joint Video Coding Team (JCT-VC) designed a new video coding standard called High Efficiency Video Coding (HEVC), which aims to provide higher than H .264 / AVC twice the compression efficiency. [0003] The basic difference between HEVC and other video coding standards is that HEVC uses a quadtree structure. The quadtree structure is a mechanism for dividing a picture into blocks of different sizes, which can improve the performance of prediction and residual coding. The basic processing unit o...

Claims

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Application Information

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IPC IPC(8): H04N19/96H04N19/85H04N19/48
Inventor 王瀚漓杜焓
Owner TONGJI UNIV
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