Encoding of motion picture signal

Details Encoding of motion picture signal Encoding of motion picture signal

1992-05-05

1993-11-02

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 85, 358105, 379 53, H04N 7137

Patent

active

052588360

ABSTRACT:
A valid/invalid detection section 1 generates an original valid block map based on a difference between frames. The current and previous valid block maps are weighted within weight sections 2 and 3 respectively and are thereafter summed up to compose them. After isolated valid blocks are removed from the composed valid block map within a segmentation section 5, it is determined whether or not a moving object exists and the direction of the moving object is determined based on the distribution of the valid block map. If a significant movement is detected, then blocks around the object are weighted at the movement direction side. Another segmentation section 7 determines valid blocks with reference to interest blocks and neighbor blocks, and isolated invalid block section 8 removes isolated invalid blocks to generate a complete valid block map. Encoding is performed based on the complete valid block map.

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patent: 4656511 (1987-04-01), Koga
patent: 4991009 (1991-02-01), Suzuki
patent: 4996594 (1991-02-01), Murayami
"A Color Motion Videophone for the ISDN", Report No. D-233, 1989.
Spring Grand Conference, The Institute of Electronics, Information . . .
"A Method for facial region detection on a color video phone", Report No. D.rho., 1989 Spring Grand Conf., The Institute of Electronics . . .

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