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Method and device of integer transform applicable to image coding and video frequency coding

A technology of integer transformation and video coding, which is applied in digital video signal modification, television, image communication, etc., can solve the problem of not being able to obtain the initial value, and achieve the effect of avoiding the mismatch problem

Inactive Publication Date: 2003-10-01
XFUSION DIGITAL TECH CO LTD
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Problems solved by technology

A disadvantage of the discrete cosine transform is that some of the coefficients in the matrix are irrational numbers, so after transforming and inverse transforming with an iterative method on a digital computer, the same initial value cannot be obtained

Method used

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  • Method and device of integer transform applicable to image coding and video frequency coding
  • Method and device of integer transform applicable to image coding and video frequency coding
  • Method and device of integer transform applicable to image coding and video frequency coding

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Embodiment Construction

[0043] Image data and video data can be divided into blocks of different sizes for integer transformation. For example, 4x4, 4x8, 8x4, 8x8, 4x16, 16x4, 16x8, 8x16 and 16x16 etc. For these blocks of different sizes, horizontal forward integer transform matrices and vertical forward integer transform matrices of size 4×4, 8×8 and 16×16 can be used for transformation. The method of transformation is as follows:

[0044] Select the size of the forward integer transformation matrix according to the size of the forward integer transformation input data block. According to the size of the input data block n×m, the size of the vertical forward integer transformation matrix is ​​selected as n×n, and the size of the horizontal forward integer transformation matrix is ​​selected as m×m, where n is the number of rows of the input data block, and m is the input data block. The number of columns of the data block.

[0045] According to the set size of the forward integer transformation m...

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Abstract

The present invention mainly uses the integer transforming method to carry on the forward integer transforming treatment for image data or video data to fransform them into vector space expressed in the forward integer transforming matrix, and the inverse integer transforming treatment is carried on for data having been transformed by for ward integer in order to restore and to obtain the original image data or the video data. The inter transforming device in the present invention is formed by connecting each function unit together through data bus to fulfil the integer transforming method.

Description

technical field [0001] The present invention relates to an integer transform method and device applied to image coding and video coding. The present invention mainly performs forward integer transformation processing on image data or video data at the image encoding end or video encoding end, and transforms it into a vector space expressed by a forward integer transformation matrix; at the image decoding end or video decoding end, transforming The data after forward integer transformation is processed by inverse integer transformation to restore the original image data or video data. It is beneficial to the compression and analysis of image data or video data. Background technique [0002] Traditional video coding standards such as H.261, H.263, H.26L, H.264 standards formulated by ITU and MPEG-1, MPEG-2, MPEG-4 formulated by ISO's MPEG organization are all based on hybrid coding. That is, on top of the Hybrid Coding framework. The so-called hybrid ...

Claims

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Application Information

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IPC IPC(8): H04N19/60
Inventor 楼剑虞露
Owner XFUSION DIGITAL TECH CO LTD
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