Orthogonal transform method and apparatus

Details Orthogonal transform method and apparatus Orthogonal transform method and apparatus

2006-11-21

2006-11-21

Do, Anh Hong (Department: 2624)

Image analysis

Image compression or coding

Transform coding

C382S232000, C382S233000, C382S250000

Reexamination Certificate

active

07139436

ABSTRACT:
In a four-by-four orthogonal transform mode, an input data buffer enters a first half of entered eight pieces of pixel data, i.e., “x0A”, “x1A”, “x2A”, and “x3A”, into each of the first to fourth multiply-and-accumulation (MAC) operation circuits, while feeding a second half of the entered eight pieces of pixel data, i.e., “x0B”, “x1B”, “x2B”, and “x3B”, into each of the fifth to eighth MAC operation circuits. In an eight-by-eight orthogonal transform mode, the input data buffer feeds entered eight pieces of pixel data into each of the first to eighth MAC operation circuits. Since the input data buffer receives the eight pieces of pixel data in each of the four-by-four and eight-by-eight orthogonal transform modes, an orthogonal transform circuit is activated once in each of the four-by-four and eight-by-eight orthogonal transform modes. In both of the four-by-four and eight-by-eight orthogonal transform modes, the same first to eighth MAC operation circuits are used to produce the orthogonal transform coefficient data. This feature inhibits an increase in hardware area.

REFERENCES:
patent: 5801776 (1998-09-01), Tamura et al.
patent: 6333951 (2001-12-01), Tamura et al.
patent: 1 065 884 (2001-01-01), None
patent: 03-104435 (1991-05-01), None
patent: 02-194734 (1991-08-01), None
patent: 04-043461 (1992-02-01), None
patent: 7-83478 (1995-06-01), None
patent: 2000244916 (2000-09-01), None
patent: 99/10818 (1999-03-01), None
Pei et al., “Transform Domain Adaptive Linear Phase Filter”, IEEE vol. 44, No. 12, Dec. 1996, pp. 3142-3146.
Wintz, “Transform Picture Coding”, IEEE vol. 60, No. 7, Jul. 1972, pp. 809-820.
Stasinski et al., “Reduced-Complexity Shape-Adaptive DCT for Region-Based Image Coding”, IEEE vol. 3, Oct. 1998, pp. 114-118.
Paek S-K et al: “A Mode-Changeable 2-D DCT/IDCT Processor for Digital VCR” IEEE Transactions on Consumer Electronics, IEEE Inc. New York, US, vol. 42, No. 3, Aug. 1996, pp. 606-616, XP000638545.
Guo J-I et al: “A Generalized Architecture for the One-Dimensional Discrete Cosine and Sine Transforms” IEEE Transactions on Circuits and Systems for Video Technology, IEEE Inc. New York, US, vol. 11, No. 7, Jul. 2001, pp. 874-881, XP001083362.

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