Low-complexity 2-power transform for image/video compression

Details Low-complexity 2-power transform for image/video compression Low-complexity 2-power transform for image/video compression

2008-05-27

2008-05-27

Wong, Allen C. (Department: 2621)

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

C375S240000, C375S240010, C375S240180

Reexamination Certificate

active

07379500

ABSTRACT:
To encode image and video data using a transform having low computational complexity and high compression efficiency, all elements of the matrix can be expressed with power-of-2 elements, with a template of the matrix approximating a DCT matrix.

REFERENCES:
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Cham, Aug. 1989, IEE Proceedings, vol. 136, Pt.1, No. 4, “Development of Integer Cosine Transforms by the Principle of Dyadic Symmetry”, pp. 276-282.
Lo, K.T., Simple Orthogonal Transform for Image Coding, 1993, Proceedings of IEEE Singapore International Conference, vol. 1, pp. 465-469.
ITU Telecommunications Standardization Sector, Study Group 16, Video Coding Experts Group (Question 15), Eleventh Meeting: Portland, Oregon, USA, Aug. 22-25, 2000, “Integer Transforms for H.26L using Adaptive Block Transforms,” Document Q15-K-24, Filename q15k24.doc, Generated Aug. 16, 2000, pp. 1-5.
ITU Telecommunications Standardization Sector, Study Group 16, Video Coding Experts Group (Question 15), 9thMeeting: Red Bank, NJ USA, Oct. 19-22, 1999, “Addition of 8×8 transform to H.26L,” Document Q15-I-39, Filename q15i39.doc, Generated Oct. 11, 1999 pp. 1-2.
ITU Telecommunications Standardization Sector, Study Group 16, Video Coding Experts Group (VCEG), “H.26L Test Model Long Term No. 8 (TML-8) draft0,” Document VCEG-N10, Filename VCEG-N10.doc, Generated Jul. 10, 2001, pp. 1-46.
Chen, Ying-Jui, et al., “Integer Discrete Cosine Transform (IntDCT),” Electrical & Computer Engineering Dept., Boston University, 8 St. Mary's St., Boston, MA 02215, Feb. 2000, pp. 1-5.
Lo, K.-T, PhD., et al., “Development of simple orthogonal transforms for image compression,” IEE Proc.-Vis. Image Signal Process., vol. 142, No. 1, Feb. 1995, pp. 22-26.
Cham, W.-K, PhD, “Development of integer cosine transforms by the principle of dyadic symmetry,” IEE Proceedings, vol. 136, Pt. I, No. 4, Aug. 1989, pp. 276-282.

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