Equipment of motion estimating and mode judging and its method

Abstract

An apparatus and method of motion estimation and mode decision includes a candidate vector group generation unit generating a candidate vector group including a motion vector of an adjacent image crossing a first macro block, where the first macro block is a macro block of an image before scaling, and the first macro block and the adjacent image exist in a same sub-group of a picture (sub-GOP). A motion vector estimation unit estimates a base vector of a second macro block from the motion vector and the candidate vector group of the first macro block overlapped with the second macro block, where the second macro block is a macro block of an image after scaling. A mode decision unit determines a mode of the second macro block from the estimated base vector and a mode of the first macro block.

Description

[0001] Cross Reference Related Applications [0002] This application claims priority from Korean Patent Application No. 2002-110 filed with the Korean Patent Office on Jan. 2, 2002, which is hereby incorporated by reference. technical field [0003] The present invention relates to a device for motion estimation and mode determination and a method thereof, more particularly, to a device capable of high-speed motion estimation and mode determination under scan format conversion, and a method thereof. Background technique [0004] Generally speaking, methods for realizing digital images are divided into interlaced scanning and progressive scanning according to the frame structure. refer to Figure 1A , interlaced scanning constructs a frame by scanning odd lines (marked with solid lines) in one field (top field) and scanning even lines (marked with dashed lines) in another field (bottom field) by two fields into a frame. Therefore, the height of each half frame is half the ...

AI Technical Summary

Problems solved by technology

Therefore, transcoders that can efficiently re-encode conversion sequences when the scan format input to the decoder and output from the encoder are different from each other have not been introduced

[0013] Also, legacy transcoders cannot support the 18 ATSC formats

In other words, transcoding has been introduced to reduce the size or bit rate, or frame rate, of an image, but cannot be used to change the scan format

For example, when converting a 1920×1080 interlaced input image to a 720×480 progressive output image, the frame type is changed during transcoding, so high-speed estimation of motion is limited

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