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Region- based 3drs motion estimation using dynamic asoect ratio of region

A technology of image area and motion vector, applied in television, electrical components, digital video signal modification, etc., can solve problems such as quality loss, and achieve the effect of slow speed and low efficiency

Inactive Publication Date: 2008-04-02
KONINKLIJKE PHILIPS ELECTRONICS NV
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Problems solved by technology

This introduces a quality loss

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  • Region- based 3drs motion estimation using dynamic asoect ratio of region
  • Region- based 3drs motion estimation using dynamic asoect ratio of region
  • Region- based 3drs motion estimation using dynamic asoect ratio of region

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Embodiment Construction

[0089] FIG. 1 shows a block diagram of a video processing device 100 connected to an external frame memory 102 . Preferably, the video processing device 100 is implemented in the form of an Application Specific Instruction Set Processor (ASIP). ASIP provides a flexible, low-cost and low-power implementation of video processing algorithms.

[0090] Other embodiments of video processing device 100 take the form of application specific integrated circuits (ASICs) or general purpose programmable processors, where video processing applications are executed by software. However, the lack of flexibility of ASICs and the slow performance of general-purpose programmable processor implementations make ASIP implementations appear to be the most favorable for commercial application purposes in consumer electronic devices, such as televisions.

[0091] The processing unit 104 of the video processing device 100 comprises a motion estimator 106 . In various embodiments, the processing unit...

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Abstract

The present invention relates to the field of motion estimation in video processing. Specifically, the invention relates to a video-processing method and device for ascertaining motion vectors for a plurality of first pixel blocks forming a currently processed image region of a currently processed image of an image sequence. The invention addresses the problem of the impact of borders between neighboring image regions in region-based motion estimation on the quality of the video output in video applications like picture-rate up conversion. The video-processing device ( 100 ) of the invention comprises a processing unit ( 104 ), which is adapted to perform motion estimation on an image according to a fragmentation of the image into a number of image regions, each image a region containing the pixel blocks shared by a first number of pixel-block lines and a second number of pixel-block columns in accordance with an adjustable value of an aspect ratio of the image region, and to set a different aspect-ratio value for processing a next image of the image sequence, such that the number of image regions per image remains constant. The dynamic change of the aspect ratio of the image regions implemented in the motion estimation device of the invention reduces the impact of the borders between neighboring image regions and thus improves the quality of region-based motion estimation.

Description

technical field [0001] The invention relates to the field of video processing. Specifically, it relates to the field of motion estimation. In particular, the present invention relates to a video processing method and apparatus for determining motion vectors for a plurality of first pixel blocks constituting a currently processing image in an image sequence. Background technique [0002] In video processing, motion estimation (ME) is a widely used task. One class of ME methods and apparatus employs a block-matching ME algorithm. The block matching ME algorithm determines motion vectors for each pixel block of an image forming part of a sequence of images. A pixel block contains a predetermined number of pixels in the x and y directions of the image. A motion vector represents the motion of a pixel block between two consecutive images in an image sequence. The block matching ME algorithm determines motion vectors by finding, for each pixel block of the currently processed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26
CPCH04N19/00521H04N7/26755H04N19/0066H04N7/2684H04N19/00515H04N7/2675H04N19/56H04N19/433H04N19/436
Inventor A·贝里克R·塞瑟拉曼
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
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