Block decoding method and system capable of decoding and...

Details Block decoding method and system capable of decoding and... Block decoding method and system capable of decoding and...

2008-04-01

2008-04-01

Do, Anh Hong (Department: 2624)

Image analysis

Image compression or coding

Including details of decompression

C382S248000, C382S250000, C382S251000

Reexamination Certificate

active

07352904

ABSTRACT:
A block decoding method and system capable of decoding and outputting data in a longitudinal direction, which obtains a start address in an input compressed datastream for each block of a decompressed image by a pre-scanned compressed datastream such that the system can obtain 90°-rotated blocks by performing a Huffman decoding in a longitudinal direction, a 90°-rotated zigzag arrangement, an inverse quantization and an IDCT. Since the decoding direction is identical to the output direction of a printer, only a desired column of blocks of the decompressed image is temporarily stored for output and accordingly required memory size is relatively reduce.

REFERENCES:
patent: 5032903 (1991-07-01), Suzuki et al.
patent: 5187570 (1993-02-01), Hibi et al.
patent: 5220440 (1993-06-01), Hisatake
patent: 5343312 (1994-08-01), Hibi et al.
patent: 5715329 (1998-02-01), Murata
patent: 406217287 (1994-08-01), None

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