Television – Image signal processing circuitry specific to television – Motion vector generation
Patent
1996-11-07
1998-07-14
Tung, Bryan
Television
Image signal processing circuitry specific to television
Motion vector generation
H04N 732
Patent
active
057812497
ABSTRACT:
A motion vector detecting method determines a motion vector of a search block included in a search frame of a video signal by using motion vectors of processed neighboring blocks, wherein the search frame is divided into a multiplicity of blocks which include a set of processed blocks whose motion vectors have been determined, and the set of processed blocks contain the processed neighboring blocks which are neighboring blocks of the search block, by: (a) selecting an X-vector and an Y-vector among the motion vectors of the processed neighboring blocks, wherein the X-vector is a vector which is most similar to a horizontal vector the and the Y-vector is a vector which is most similar to a vertical vector, to thereby provide a group of candidate vectors which include the X-vector, the Y-vector and a 0 vector; (b) deciding a candidate motion vector among the group of candidate vectors; and (c) providing the candidate motion vector as the motion vector of the search block in case a distortion between the search block and a predicted block corresponding to the candidate motion vector is smaller than a predetermined threshold value and determining the motion vector of the search block by using a full search block matching method in case the distortion is not smaller than the predetermined threshold value.
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Chen and Pratt, "Scene Adaptive Coder", IEEE Transactions on Communications, vol. COM-32, No. 3, pp. 225-232, Mar. 1984.
Jain et al., "Displacement Measurement and Its Application in Interframe Image Coding", IEEE Transactions of Communications, vol. COM-29, No. 12, pp. 1799-1808, Dec. 1981.
Daewoo Electronics Co. Ltd.
Tung Bryan
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