Motion picture data coding/decoding system having motion vector

Details Motion picture data coding/decoding system having motion vector Motion picture data coding/decoding system having motion vector

1990-09-27

1992-04-14

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358135, 358105, H04N 712, H04N 718

Patent

active

051052717

ABSTRACT:
A motion picture data coding/decoding system comprises a motion vector coding unit for detecting a motion vector between input and reference images at every block of several pixels by correlative operation, and a motion vector decoding unit for decoding the motion vector. The coding unit comprises digitized block cutting circuits for respectively digitizing pixels of both the images in several stages, and cutting blocks having necessity of detecting the motion vector; a first motion vector detection circuit for performing the correlative operation of a motion vector dectection about the roughest stage blocks cut by the first stage cutting circuit; a second motion vector detection circuit for detecting a motion vector of the stage by a differential vector on the basis of the motion vector as an initial vector which is detected by the motion vector detection circuit rougher than the stage; a coding circuit for coding the motion vector between the input and reference images by the initial vector in the roughest stage block and differential vector of each stage. The decoding unit comprises a distributing circuit for distributing a code signal multiplied by the coding unit; a several stage decoding circuits for obtaining the differential vector of each stage by decoding several distributing codes; and the final stage decoding circuit for obtaining the initial vector by decoding the distributed code by the obtained differential vector.

REFERENCES:
patent: 4245248 (1981-01-01), Netravali et al.
patent: 4668987 (1987-05-01), Matsuda et al.
patent: 4769826 (1988-09-01), Kubo et al.
patent: 4853775 (1989-08-01), Rouvrais et al.
patent: 4862264 (1989-08-01), Wells et al.
patent: 4924310 (1990-05-01), von Brandt
patent: 4953019 (1990-08-01), Skikakura et al.

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