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Image and digital video coding and decoding methods

A technology of digital video and encoding method, applied in the field of image and digital video encoding and decoding, can solve problems such as poor scalability and decoder mismatch, and achieve the effect of high compression performance and good scalability

Inactive Publication Date: 2011-04-27
SOUTHEAST UNIV
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Problems solved by technology

[0035] The technical problem to be solved by the present invention is to solve the problems of decoder mismatch and poor scalability existing in the existing encoding and decoding methods, and provide a simple image and digital video encoding and decoding method that can realize lossless encoding

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  • Image and digital video coding and decoding methods
  • Image and digital video coding and decoding methods
  • Image and digital video coding and decoding methods

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Embodiment Construction

[0059] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0060] attached figure 1 It is a structural block diagram of a typical image and digital video data encoding and decoding system, wherein the dotted line box represents the integer transformation method adopted in the prior art, and the solid line box represents the integer transformation method adopted in the present invention. To encode using the above device, follow the steps below:

[0061] Step 1, the data input device inputs image or digital video data;

[0062] Step 2, the two-dimensional forward discrete orthogonal transformation device performs two-dimensional integer discrete Tchebichef transformation on the input data according to the following method:

[0063] Step 201, divide the input image or digital video data into non-overlapping data blocks with a size of N×N, N represents the number of pixels in the length or width direction of the ...

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Abstract

The invention discloses image and digital video coding and decoding methods, and belongs to the technical field of digital image processing. In the coding and decoding methods, when two-dimensional forward / inverse discrete orthogonal transformation is carried out, two-dimensional integer forward / inverse discrete Tchebichef transformation is adopted. In the invention, the two-dimensional integer forward / inverse discrete Tchebichef transformation is used in place of other integer transformation method used in the prior art, so that the method can effectively solve the mismatch problem of a decoder, realizes lossless coding, and has high compression property and high expandability. The invention further provides a fast algorithm of 8*8 integer discrete Tchebichef transformation matrix; and the algorithm only needs shifting and addition operation, so that the consumption of hardware resource is reduced, and hardware realization is facilitated.

Description

technical field [0001] The invention relates to an image and digital video encoding and decoding method, belonging to the technical field of digital image processing. Background technique [0002] Since the image data has a strong correlation in the spatial domain, and the two-dimensional discrete orthogonal transform is an effective method to remove the redundancy in the spatial domain of the image residual block, it is widely used in traditional image coding standards (such as: JPEG, etc.) and traditional video coding standards (such as: H.264, AVS, etc.). The process of image or video encoding and decoding usually includes the following steps: [0003] Encoding process: [0004] 1. Input image or video data; [0005] 2. Divide the input image or video data into small data blocks that do not overlap with each other and perform two-dimensional forward discrete orthogonal transformation on the small data blocks respectively to obtain transform domain coefficients; [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N7/30H04N19/625
Inventor 伍家松王膂李松毅罗立民舒华忠
Owner SOUTHEAST UNIV
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