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Coding method as well as decoding method and device

An encoding method and encoding technology, applied in the field of communication, can solve the problems of reducing hardware utilization and easily wasting computing resources, and achieve the effect of reducing complexity and improving computing efficiency.

Active Publication Date: 2012-07-25
MIGU CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] In order to solve the above-mentioned technical problems, the embodiment of the present application provides an encoding method, a decoding method and a device to solve the problem that the ROT transformation process in the prior art encoding and decoding is easy to waste computing resources and reduce hardware utilization.

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  • Coding method as well as decoding method and device
  • Coding method as well as decoding method and device
  • Coding method as well as decoding method and device

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Embodiment Construction

[0047] The following embodiments of the present invention provide an encoding method, a decoding method and a device. In view of the fact that the ROT transformation in the existing encoding and decoding process is relatively complicated and not conducive to hardware implementation, the embodiment of the present application aims to provide a ROT transformation matrix that is easy to implement in hardware. While improving the efficiency of encoding and decoding, it reduces the computational complexity.

[0048] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention, and to make the above-mentioned purposes, features and advantages of the embodiments of the present invention more obvious and understandable, the following describes the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings For further detailed explanation.

[0049] Both the encodin...

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Abstract

The embodiment of the application discloses a coding method as well as a decoding method and device. The coding method comprises the following steps of: respectively carrying out ROT (Rotational Transform) forward transform on an input signal after DCT (Discrete Cosine Transform) is carried out according to a plurality of preset ROT forward transform matrixes to obtain a transform coefficient after the ROT forward transform, wherein each coefficient in the ROT forward transform matrixes can be decomposed into a plurality of shifting coefficients, and each shifting coefficient is composed of a shifting bit and a sign bit; after the transformation coefficient subjected to the ROT forward transform is quantified, comparing distortions of output signals obtained by calculating according to the quantified transform coefficients; and selecting the ROT forward transformation matrix corresponding to the output signal with minimum distortion as the optimal ROT forward transformation matrix of the current coding block, and coding according to the optimal ROT forward transformation matrix. According to the application, a multiply operation in an ROT transformation process is replaced by a shift operation and an addition operation, so that the computational efficiency is improved.

Description

technical field [0001] The present application relates to the field of communication technology, and in particular, to an encoding method, decoding method and device. Background technique [0002] DCT (Discrete Cosine Transform, Discrete Cosine Transform) is a transformation method widely used in the process of encoding and decoding video images. Because the DCT transformation matrix has symmetric characteristics, the disk algorithm is usually used when realizing the transformation in hardware. Since the DCT transformation is implemented by two one-dimensional transformations, namely along the vertical direction and along the horizontal direction, when the input two-dimensional data to be encoded has significant directional characteristics, for example, the main direction of the data is not in the vertical or horizontal direction , it is difficult to better describe the signal characteristics through DCT. [0003] In view of this, in order to better describe the signal cha...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N7/30
CPCH04N19/00278H04N19/00078H04N19/002H04N19/154H04N19/12H04N19/176
Inventor 闻兴区子廉孙林
Owner MIGU CO LTD
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