DCT-based scalable video compression

Details DCT-based scalable video compression DCT-based scalable video compression

2007-07-17

2007-07-17

Philippe, Gims (Department: 2621)

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

C382S250000

Reexamination Certificate

active

10415008

ABSTRACT:
A method of encoding an input video signal for communication over a computer network, the method comprising the steps of: i) dividing each frame into a two-dimensional array of macroblocks; ii) detecting motion between each macroblock of a current frame and the corresponding macroblock of a previous frame, and coding only those macroblocks where motion is detected; iii) replacing all coefficients of non-coded macroblocks with zero coefficients; iv) applying discrete cosine transformation to coded macroblocks; v) reorganizing coefficients into a multi-resolution representation; vi) quantizing the coefficients with a uniform scalar quantizer to produce a significance map; and vii) adaptive arithmetic coding of said signal by encoding the motion information, encoding the significance map, encoding the signs of all significant coefficients, and encoding the magnitudes of significant coefficients, in bit-plane order starting with the most significant bit.

REFERENCES:
patent: 5602589 (1997-02-01), Vishwanath et al.
patent: 5946043 (1999-08-01), Chen et al.
patent: 5973738 (1999-10-01), Srivastava
patent: 6130912 (2000-10-01), Chang et al.
patent: 6850649 (2005-02-01), Malvar
patent: 6917711 (2005-07-01), Wang et al.
patent: 197 34 542 (1999-02-01), None
D. Kalles and A.N. Skodras, Motion Estimation and DCT Pruning: A Combined Approach to Video Coding, Electronics Laboratory, University of Patras, GR-26110 Patras, Greece.

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