Reduced complexity IDCT decoding with graceful degradation

Details Reduced complexity IDCT decoding with graceful degradation Reduced complexity IDCT decoding with graceful degradation

2006-03-28

2006-03-28

Zhen, Wei (Department: 2193)

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

Reexamination Certificate

active

07020672

ABSTRACT:
Data compressed according to a lossy DCT-based algorithm, such as the MPEG or MPEG2 algorithms, is decompressed according to a dynamically-selected set of DCT coefficients, with unused coefficients masked out. A macroblock of the data exhibiting little motion is decompressed with a small subset of DCT coefficients, while a macroblock exhibiting more motion is decompressed using a larger subset of DCT coefficients up the full set of DCT coefficients. Average computational complexity is thus kept low, enabling the use of inexpensive equipment, while degradation is minimized.

REFERENCES:
patent: 5216516 (1993-06-01), Tanaka et al.
patent: 5379122 (1995-01-01), Eschbach
patent: 5881176 (1999-03-01), Keith et al.
patent: 5883823 (1999-03-01), Ding
patent: 5959673 (1999-09-01), Lee et al.
patent: 6167092 (2000-12-01), Lengwehasatit
patent: 6167155 (2000-12-01), Kostrzewski et al.
patent: 6295320 (2001-09-01), Lim et al.
patent: 6374280 (2002-04-01), Li
patent: 6400680 (2002-06-01), Fisch
patent: 6466924 (2002-10-01), Tateishi et al.
patent: 6587590 (2003-07-01), Pan
patent: 1079636 (2001-02-01), None
Eri et al., Fast 2-D IDCT implementation with multimedia instructions for a software MPEG2 decoder, 1998, IEEE, pp. 31053108.
Lowell Winger, Source adaptive software 2D IDCT with SIMD, 2000, IEEE, pp. 3642-3645.
John et al., Large block VQ for image sequences, 1999, IEEE Image Processing and its Applications Conference Publication No. 465, pp. 183-187.
Thucydides et al., A low-power IDCT macrocell for MPEG2 MP@ML exploiting data distribution properties for minimal activity, 1998, IEEE Symposium on VLSI circuits Digest of Technical papers, pag s 38-39.
Hong et al: “An Edge-Preserving Image Interpolation System For A Digital Camcorder” IEEE transactions On Consumer Electronics, IEEE Inc. New York, US, vol. 42, No. 3, Aug. 1, 1996, pp. 279-283.

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