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Motion estimation method, apparatus and multimedia processor

A motion estimation and buffer technology, applied in the field of video coding, can solve the problems of increased cost and area of ​​multimedia processors, inability to adapt to portable multimedia processors, and reduced product competitiveness. The effect of storage space costs

Inactive Publication Date: 2009-01-07
ACTIONS ZHUHAI TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although increasing the capacity of the cache can guarantee bandwidth resources, increasing the cache inevitably increases the cost and area of ​​the multimedia processor, reduces product competitiveness, and cannot meet the needs of some portable multimedia processors.

Method used

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  • Motion estimation method, apparatus and multimedia processor
  • Motion estimation method, apparatus and multimedia processor
  • Motion estimation method, apparatus and multimedia processor

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Embodiment Construction

[0054] like figure 2 As shown, each frame of image is divided into C rows and L columns in units of macroblocks, each frame contains C×L macroblocks, and the search window includes h rows and w columns of macroblocks, where h and w are greater than or equal to 3 odd number. like image 3 The schematic diagram of the movement of the search window is shown. The solid line indicates the position of the search window in the reference frame when the macroblock whose coordinates are [1, 1] in the current frame is the current macroblock. The dotted line indicates that the coordinates of the current frame are [1, 2]. ] is a schematic diagram of the position of the search window in the reference frame when the macroblock of ] is the current macroblock. If the data of each column of macroblocks in the search window is defined as a data block, it can be seen that the search window moves every time in the order of behavior , among the data of the search window of two adjacent macrobloc...

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Abstract

The embodiment of the invention provides a motion estimation method and a device thereof, and a multimedia processor, which are used for reducing the size of a buffer as far as possible based on that bandwidth resources required by motion estimation are ensured. The technical proposal provided by the embodiment of the invention only updates a row of macroblock data which changes after a search window moves when the data of the search window of the motion estimation is updated, thus reducing the updating amount of the data and improving the performance of the operation estimation; combined with a data updating operation method, the embodiment of the invention arranges a minimum memory space required by the data of the search window on the buffer, thereby greatly reducing the occupation of the memory space and reducing the volume of the buffer.

Description

technical field [0001] The present invention relates to the field of video coding, in particular to motion estimation technology in video coding processing. Background technique [0002] Multimedia processors usually need to encode video data stored in memory. Video coding methods include intra-frame compression and inter-frame compression. One of the key technologies for inter-frame compression is motion estimation. Inter-frame compression through motion estimation can Remove the temporal correlation (redundancy) between adjacent frames and improve the compression ratio of video images. When the video image is continuously displayed at a rate of not less than 24 frames per second, due to the persistence of vision of the human eye, people have a continuous feeling. Therefore, in general, the content changes between adjacent frames are very limited, and there are Larger correlation, this correlation is called time-domain correlation (time-domain redundancy). The purpose of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N19/176H04N19/51
Inventor 阳昕
Owner ACTIONS ZHUHAI TECH CO