Apparatus for coding an object region of a video signal by using

Details Apparatus for coding an object region of a video signal by using Apparatus for coding an object region of a video signal by using

1996-07-03

1998-02-10

Lee, Richard

Television

Bandwidth reduction system

Data rate reduction

348403, 382250, H04N 730

Patent

active

057174652

ABSTRACT:
An apparatus for coding an arbitrarily shaped object region of a video signal comprises a processing block decision circuit. The processing block decision circuit selects a processing block encompassing the object region based on the shape information to generate the processing block signal and processing block position data, wherein the processing block includes P.times.Q subblocks, P and Q being positive integers. The apparatus also includes a subblock rearrangement circuit. The subblock rearrangement circuit rearranges the subblocks of the processing block to generate a rearranged processing block having a minimum number of the subblocks encompassing the object region and position information representing positions of the rearranged subblocks. A transform coding circuit then converts the rearranged processing block on a subblock-by-subblock basis to a transform coded video signal to be transmitted.

REFERENCES:
patent: 4796087 (1989-01-01), Guichard et al.
patent: 4837724 (1989-06-01), Borgers et al.
patent: 4858005 (1989-08-01), Lodge
patent: 5363146 (1994-11-01), Saunders et al.
patent: 5519503 (1996-05-01), Ohki
patent: 5563718 (1996-10-01), Wober et al.
Hotter, "Object-Oriented Analysis-Synthesis Coding Based On Moving Two-Dimensional Objects", Signal Processing: Image Communication, 2, No. 4, pp. 409-428, Dec. 1990.

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