Sub-picture restoring method and apparatus in digital video disk

Details Sub-picture restoring method and apparatus in digital video disk Sub-picture restoring method and apparatus in digital video disk

1997-06-27

2000-09-05

Tran, Thai

Motion video signal processing for recording or reproducing

Local trick play processing

With randomly accessible medium

386 45, 386125, H04N 576

Patent

active

061155292

ABSTRACT:
A sub-picture restoring method and apparatus defined in the specification of a commercialized digital video disk (DVD) system is provided. A bit stream buffer (33) stores the sub-picture data and a color lookup table of the compression-encoded bit stream. A run-length decoder (35) decodes the pixel data in the sub-picture data and outputs two bit data representing a pixel type (e.g., background pixel, character pixel, edge emphasis pixel, etc.). An index generator (36) outputs the color index and contrast value of the corresponding pixel according to the pixel type. A color controller (37) outputs a color of a table position designated by the color index input from the loaded color lookup table. A controller (34) loads the color lookup table stored in the bit stream buffer, analyzes various commands in the display control sequence table of the sub-picture data in order to control the decoding execution, stop and output for the run-length decoder in a match for a display area, and outputs the color index and contrast information with respect to each pixel to the index generator.

REFERENCES:
patent: 5721720 (1998-02-01), Kikuchi et al.
patent: 5758007 (1998-05-01), Kitamura et al.
patent: 5781183 (1999-08-01), Takahashi et al.
patent: 5940067 (1999-08-01), Greene
patent: 5949409 (1999-09-01), Tanaka et al.

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