Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Patent
1997-10-06
2000-04-18
Britton, Howard
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
348397, 348402, H04N 732, H04N 730, H04N 712
Patent
active
060524162
ABSTRACT:
A data processor includes a first encoder, a first storage medium, a subtracter, a second encoder, a second storage medium, and an output section. The first encoder generates, by using a predetermined first coding method, a main code prepared by encoding a moving picture signal input as an original signal. The first storage medium stores the main code generated by the first encoder. The subtracter calculates a coding distortion generated upon coding by the first encoder. The second encoder encodes, by using a predetermined second coding method, the coding distortion calculated by the subtracter, thereby generating a compensation code. The second storage medium stores the compensation code generated by the second encoder. The output section outputs the main and compensation codes respectively stored in the first and second storage media.
REFERENCES:
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patent: 5418571 (1995-05-01), Ghanbari
patent: 5515377 (1996-05-01), Horne et al.
patent: 5742343 (1998-04-01), Haskell et al.
patent: 5852565 (1998-12-01), Demos
patent: 5973739 (1999-10-01), Nilsson
Japanese Office Action dated Nov. 27, Hei 11 with English language translation of Japanese Examiner's comments.
M. Ghanbari; Two-Layer Coding of Video Signals for VBR Networks, IEE Journal on Selected Areas in Communications; Jun. 1989; No. 5, New York.
Britton Howard
Diep Nhon T
NEC Corporation
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