Communication apparatus having coding/decoding means responsive

Details Communication apparatus having coding/decoding means responsive Communication apparatus having coding/decoding means responsive

1994-09-27

1999-03-30

Woo, Stella

Television

Two-way video and voice communication

User positioning

348 17, 348 19, H04N 714

Patent

active

058895493

ABSTRACT:
Disclosed is a communication apparatus in which coding and/or decoding parameters for coding and/or decoding data can be performed in dialog fashion to make possible the optimum coding of transmitted data and the optimum reproduction of received data. The apparatus includes a coefficient adjusting unit for adjusting coding and/or decoding parameters, and a decode-signal changeover unit for selecting, as an input signal to be decoded, one of a reception signal that has been received through a line and a transmission signal that has been coded, wherein the parameters are adjusted based upon the coded transmission signal. The apparatus further includes an image synthesizing unit for simultaneously displaying an input signal from input means and a decoded signal.

REFERENCES:
patent: 4534057 (1985-08-01), Miyata et al.
patent: 4679042 (1987-07-01), Trethewey
patent: 4980761 (1990-12-01), Natori
patent: 4995071 (1991-02-01), Weber et al.
patent: 5164980 (1992-11-01), Bush et al.
Pat. Abs. Jp. vol. 14, No. 537, Nov. 27, 1990 (JP-A-2226987).
Pat. Abs. Jp. vol. 14, No. 560, Sep. 27, 1990 (JP-A-2243082).
Signal Proc. Image Comm., No. 1, Feb. 3, 1991, pp. 57-69, Loos et al. "Hybrid Coding with Pre-Buffing and Pre-Analysis in a Software-Based Codec Environment".

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