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Method and device for motion estimation

A motion vector, compression method technology, applied in television, electrical components, digital video signal modification and other directions, can solve the problems affecting the coding efficiency of the compression scheme and the large amount of motion estimation calculation.

Inactive Publication Date: 2007-08-01
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when motion estimation is performed on the base layer and the enhancement layer separately, because the same frame of image is predicted, a considerable part of the search process is repeated, which leads to a large amount of calculation for motion estimation, which affects the Coding Efficiency of Compression Schemes

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  • Method and device for motion estimation

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Embodiment Construction

[0019] Fig. 2 is a schematic diagram of an encoding system utilizing reference motion vectors according to an embodiment of the present invention. The coding system 200 is used for layered compression, in which the base layer part is used to provide low-resolution basic information of the video stream, and the enhancement layer is used to transmit edge enhancement information, and the two kinds of information can be recombined at the receiving end to form high-resolution image information.

[0020] The coding system 200 includes an obtaining means 216 , a base layer obtaining means 212 and an enhancement layer obtaining means 214 .

[0021] Wherein, the obtaining means 216 is used for processing the original video stream, so as to obtain the reference motion vector of each frame of the video stream. Obtaining means 216 includes motion estimation means 276 and frame memory 282 . Frame memory 282 is used to store the original video sequence. The motion estimation device 276 i...

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Abstract

A method and apparatus for spatial layered compression of video stream are disclosed. Reference motion vector is introduced into the compression scheme of the present invention, and according to this reference motion vector, the base layer and enhancement layer may acquire the motion vector of the corresponding frame of image of the video stream, respectively, and thereby to respectively generate a base layer and enhancement layer. The introduced reference motion vector makes the motion estimation about the base layer associated with the motion estimation about the enhancement layer, thereby to reduce the total amount of calculation of the motion estimation about the base layer and enhancement layer. Further, because the reference frame for obtaining the reference motion vector can be obtained from original video sequence and no additional harmful operating is made on the original video sequence, the reference motion vector may better reflect actual motion within the video sequence.

Description

Background technique [0001] The present invention relates to a video stream compression method and device, in particular to a video stream compression method and device utilizing a spatial layered compression scheme. [0002] Because digital video contains a large amount of data, the transmission of high-resolution video signals is a big problem when producing high-definition (High Resolution) television programs. Furthermore, each frame of digital image is a still image (also called image) composed of a group of pixels (pixels, also called pixels), and the number of these pixels depends on the display resolution of a specific system. Therefore, the amount of raw digital information in high-resolution video is enormous. In order to reduce the amount of data to be transmitted, many video compression standards have been proposed, such as MPEG-2, MPEG-4, and H.263. [0003] All the above-mentioned standards support layering technologies, including spatial layering, time domain ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N19/33H04N19/61
Inventor 王进
Owner KONINKLIJKE PHILIPS ELECTRONICS NV