Image analysis – Color image processing – Compression of color images
Patent
1997-12-31
2000-09-19
Couso, Jose L.
Image analysis
Color image processing
Compression of color images
382239, 382250, G06K 900, G06K 946
Patent
active
061224006
ABSTRACT:
A method and concomitant apparatus that adaptively utilizes at least chrominance information to control bit allocation in an MPEG-like compression encoder. The invention controls bit allocation of a video signal by examining at least color difference (U, V) components within the video signal, identifying, illustratively, flesh-tone indicative portions of the color difference signals, and preferentially encoding those identified portions of the video signal by allocating additional bits to, e.g., macroblocks associated with the flesh-tone indicative portions of the signal.
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patent: 5488429 (1996-01-01), Kojima et al.
patent: 5638136 (1997-06-01), Kojima et al.
Van Dyck et al. Subband/VQ Coding of Color Images with Perceptually Optimal Bit Allocation. IEEE Transactions on Circuits and Systems for Video Technology, vol. 4, No. 1. pp. 68-82, Feb. 1994.
Toyokura et al., A Video DSP with a Macroblock-Level-Pipeline and a SIMD Type Vector-Pipeline Architecture for MPEG2 CODEC, IEEE j. Solid-State Circ., vol. 29, No. 12, pp. 1474-1481, Dec. 1994.
PCT Search Report Feb. 3, 1999.
Burke William J.
Cage Shawn B.
Couso Jose L.
Sarnoff Corporation
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