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Coding method and device for block type digital coding image

A digital encoding and image technology, applied in the field of digital image decoding, can solve the problems of time occupation and computing resources consumption, and achieve the effect of improving performance

Active Publication Date: 2008-02-06
VIA TECH INC
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AI Technical Summary

Problems solved by technology

The derivation process of these motion vectors mvL0 and mvL1 requires the decoding process of each direct mode block CurBlk to search for the corresponding image MapPic in the zeroth reference picture list L0, and this search process takes a lot of time
In addition, it can be seen from the above calculation formula that the distance adjustment parameter tx needs to be divided. If it is directly calculated in each direct mode block CurBlk, it will also consume a lot of computing resources.

Method used

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  • Coding method and device for block type digital coding image
  • Coding method and device for block type digital coding image
  • Coding method and device for block type digital coding image

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Embodiment Construction

[0033] The details of the present invention will be described below in conjunction with related drawings, and the same numbers or symbols in different drawings represent the same elements or concepts. Access information refers to address information that can be used to access specific data. For example, the access information can be, but not limited to, an index or pointer corresponding to a specific data storage area. In addition, the block mentioned below in this article may be an 8×8 or 16×16 pixel area.

[0034] FIG. 3A shows a method 300 for decoding a block-based digital coded image according to an embodiment of the present invention, as well as its main flow and the relationship of related data structures. The method 300 for decoding a block-based digitally encoded image is a decoding process for a current image CurPic, which includes an image pre-processing program 302 , a direct mode block processing program 304 and a block decoding program 306 .

[0035] The image p...

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Abstract

The present invention provides a coding method and device used for block type numerical coding picture, in particular to a coding method of block type numerical coding picture which comprises the following steps: rebuilding a class 0 referenced picture list and class 1 referent picture list of the present picture according to a given numerical picture coding protocol; building a control table which comprises a parameter columns used for storing adjusting parameter, and the adjusting parameter is educed from the timing eigenvalue of the present picture, the coordination picture and the given referenced picture; determining the derived moving vectors of the direct-mold bidirectional predicting block according to the given moving vectors of the parameter column and the coordination block relative to the given referenced picture. The present invention can increase the efficiency of the whole picture coding.

Description

technical field [0001] The present invention relates to a digital image decoding technology, in particular to a decoding method and device for a block-type digital coded image including a Direct Mode Bi-Predictive Block. Background technique [0002] The block-based digital image coding technology usually divides an image frame (frame) into multiple macroblocks (macroblock or MB), and encodes brightness data and color data of pixels (picture element or pixel) respectively. For example, in the coding technology of H.264, a macroblock refers to an image area including 16×16 pixels. The encoding method of each macroblock can be Intra Prediction or Inter Prediction. The encoding method of same-frame prediction basically refers to the encoded blocks in the same frame, and encodes the difference between them. Inter-frame prediction refers to already encoded blocks in different frames and encodes the differences between them. Generally, the coding method of cross-frame predictio...

Claims

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Application Information

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IPC IPC(8): H04N7/26H04N7/32H04N19/174H04N19/44
Inventor 傅国长李佳勋
Owner VIA TECH INC
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