Method and device for video codec conversion in HEVC standard
A video codec and transformation device technology, which is applied in digital video signal modification, image communication, electrical components, etc., can solve the problems of increased complexity of transformation operations, wasteful transformation of small hardware sizes, high computational complexity, etc., to reduce Calculation complexity, effect of reducing data volume
Active Publication Date: 2019-02-15
北京君正集成电路股份有限公司
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[0003] However, the computational complexity of DCT / IDCT transformation is still relatively high, and the computational complexity directly affects the balance between transformation efficiency and hardware area, that is, in order to improve transformation efficiency, it is necessary to increase the size of the transformation unit, thus making the transformation The complexity increases accordingly, and accordingly, the hardware area for realizing DCT transform / IDCT transform also increases, but such hardware is a waste for small-size transform
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[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0040] An embodiment of the present invention provides a video codec conversion method in the HEVC standard, such as figure 1 As shown, the method includes:
[0041] S11, setting the basic butterfly operation unit and the basic matrix multiplication operation unit;
[0042] S12. Perform butterfly compression on the H×L input matrix of the two-dimensional DCT transformation, and transpose the butterfly compressed H×L input matrix to obtain a corresponding tran...
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The embodiment of the invention discloses a video encoding and decoding transformation method and a device in an HEVC standard, which relate to the technical field of digital video signal encoding and decoding and solve the defect that along with constant increasing of a video transformation unit in the prior art, the video transformation computational complexity is high. The video encoding and decoding transformation method in the HEVC standard comprises steps: a basic butterfly computing unit and a basic matrix multiplication unit are set; butterfly compression is carried out on a two-dimensional DCT transformation H*L input matrix, transposition is carried out on the H*L input matrix after butterfly compression, a corresponding transposition matrix is obtained, wherein the transposition matrix is composed of (H / 4) L*4 column input matrixes, and no redundant block exists in the L*4 column input matrix; L*H one-dimensional DCT transformation is carried out on the transposition matrix; H*L one-dimensional DCT transformation is carried out on a transposition matrix for the L*H one-dimensional DCT transformation output matrix; and zero block decompression and parity reconstruction are carried out on the H*L one-dimensional DCT transformation output matrix to obtain a two-dimensional DCT transformation output matrix.
Description
technical field [0001] The present invention relates to the technical field of digital video signal encoding and decoding, in particular to a video encoding and decoding conversion method and device in the HEVC standard. Background technique [0002] MPEG series standards, H.264 standard, VC-1 standard and other video coding standards support transformation units with a size below 8X8. In order to be suitable for encoding ultra-high resolution videos, the HEVC standard introduces transformation units with sizes of 16X16 and 32X32. With the increase of the transformation unit, the complexity of the transformation operation will increase exponentially. The makers of the HEVC standard are obviously aware of this, and the DCT transformation / IDCT transformation uses a fast butterfly algorithm to reduce the complexity of the operation. [0003] However, the computational complexity of DCT / IDCT transformation is still relatively high, and the computational complexity directly affec...
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IPC IPC(8): H04N19/122H04N19/60
Inventor 张传兵
Owner 北京君正集成电路股份有限公司