Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1992-08-31
1993-11-09
Chin, Tommy
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358105, 358136, H04N 7133, H04N 7137
Patent
active
052607828
ABSTRACT:
An input frame of video sequence is partitioned into smaller blocks of pixel data where each block is subjected to an edge detection which examines the activities in the block itself and the surrounding blocks to determine whether the block can be classified as an edge block. If the block is classified as a non-edge block, the conventional DCT coding method (e.g. SM3) with or without motion compensation is applied to the block. On the other hand, if the block is classified as an edge block, the block is subjected to a pixel value prediction process with or without reference to the previously coded frames, followed by a quantization process, and a run-length encoding process with variable length codes, i.e., a DPCM process.
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patent: 5073820 (1991-12-01), Nakagawa et al.
"Hybrid Image Coding Scheme Incorporating Human Visual System Characteristics", Ngan et al., 2417 Optical Engineering, Jul. 1991, No. 7, Bellingham, WA pp. 940-946.
"Interpolative, Predictive and Pyramid Transform Coding of Color Images", Haskell, AT & T Bell Laboratories, Holmdel, NJ. 1988 IEEE pp. 785-787.
"HDTV Transmission System in an ATM-based Network", Kishimoto et al., 8376 Signal Processing Image Communication, Jun. 1991, Amsterdam, NE, '91 Elsevier Science Publishers, pp. 111-122.
IEEE Transactions On Communications, vol. 36, No. 3, Mar. 1988; "A Subjective Evaluation of Noise-Shaping Quantization for Adaptive Intra-/Interframe DPCM Coding of Color Television Signals", Bernd GIROD et al.
International Organization For Standardization, ISO/IEC/SC2/WG11, "Coding Of Moving Pictures And Associated Audio"; MPEG90/041; Jul. 1990; Source: Simulation Model Editorial Group, MPEG Video Simulation Model Three (SM3).
Chin Tommy
Le Vu
Matsushita Electric - Industrial Co., Ltd.
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