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Method for calculating moving vector

A technology of moving vectors and calculation methods, which can be used in TV, electrical components, digital video signal modification, etc., can solve the problem of memory storage space consumption, achieve the effect of saving memory space and improving use efficiency

Inactive Publication Date: 2006-03-22
VIA TECH INC
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0004] However, when dealing with the boundary of the image frame in the prior art, there will be problems because the reference block falls outside the image frame, so the prior art will pre-add an additional block 15 that may be referenced outside the image frame ( slash in the icon), so that the decoder or decoding program can correctly obtain the reference block and work correctly
[0005] However, this method of adding additional blocks consumes more memory storage space, especially for hardware decoding devices with limited memory capacity, if the amount of additional stored data can be reduced, the memory can be used more efficiently

Method used

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Embodiment Construction

[0017] The motion vector calculation method according to a preferred embodiment of the present invention will be described below with reference to related figures.

[0018] Such as figure 2 As shown, the motion vector calculation method according to the preferred embodiment of the present invention is applied to an image frame, the image frame includes at least one image frame segment, and the image frame segment includes a plurality of blocks, and the method includes steps S1 to S3.

[0019] Step S1 is to select a target block from the blocks.

[0020] Step S2 is to determine whether a first reference block, a second reference block, and a third reference block corresponding to the target block exceed the boundary of the image frame segment according to the position of the target block in the image frame segment. A judgment result is generated, wherein the judgment result is that the first reference block, the second reference block and the third reference block do not exce...

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Abstract

A moving vector calculation method used in an image frame containing at least segment having plurality of zone blocks, which contains selecting an object zone block from zone blocks, judging whether the object zone block corresponded a first reference zone block, a second reference zone block and third reference zone block exceeds the boundary of image frame segment, producing a judgment result that which reference zone block does not exceed the boundary of image segment, according to said result to generate the prediction value for calculating moving vector of object zone block.

Description

technical field [0001] The invention relates to a method for calculating a moving vector, in particular to a method for calculating a moving vector which saves memory usage space. Background technique [0002] Compressed images such as MPEG images use motion vectors to store the difference values ​​of the blocks in the previous and subsequent image frames, thereby reducing the size of the storage or transmission. In newer image formats, blocks can also store the difference of motion vectors to further compress image data. [0003] Such as figure 1 As shown, an image frame with a size of 8×8 (the non-slashed part in the figure) includes blocks 11-14. In the process of decoding image data, it is assumed that the current data is the motion vector difference of block 11 and the motion vectors of blocks 12 to 14. At this time, if the motion vector corresponding to block 11 is required, the motion vectors of block 12, block 13, and block 14 must be referred to, and the differenc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/32H04N19/55
Inventor 谢秉峰
Owner VIA TECH INC