Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Reexamination Certificate
2007-07-24
2007-07-24
Rao, Anand S. (Department: 2621)
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
C375S240250
Reexamination Certificate
active
10484789
ABSTRACT:
This invention is an MPEG decoding apparatus (10) for decoding a compression-coded image data stream, the apparatus including a motion compensation circuit (15) and error map table holding means (19) for holding an error map table with respect to a decoded frame to be referred to in performing motion compensation. When the error map table is referred to and an error block is found to be included in a reference area, or when dynamic image data of a decoding target block is broken, the motion compensation circuit (15) performs error conceal processing to interpolate a pixel in the decoding target block with a pixel in the decoded frame and output the resulting data. The motion compensation circuit (15) generates an error map table showing the error-concealed block as an error block and stores this error map table. This MPEG decoding apparatus (10) restrains propagation of an error due to the error conceal processing and reduces deterioration in image quality.
REFERENCES:
patent: 5247363 (1993-09-01), Sun et al.
patent: 6876705 (2005-04-01), Katsavounidis et al.
patent: 2000-102018 (2000-04-01), None
patent: 3297293 (2002-04-01), None
Ogura Takayuki
Takashima Masatoshi
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