Transmission speed control system for facsimile picture signals

Details Transmission speed control system for facsimile picture signals Transmission speed control system for facsimile picture signals

1996-12-27

1998-05-12

Stoll, Thomas L.

Facsimile and static presentation processing

Facsimile

Auxiliary signal

358435, 358436, 358438, 358439, 358405, H04N 100

Patent

active

057514402

ABSTRACT:
A mobile facsimile communication system which can perform an optimum control of the transmission speed according to reception conditions in a radio section. The system includes a station on a picture signal receiving side and another station on a picture signal sending side. The station on the receiving side is provided with a speed estimating unit for estimating the current transmission speed, a counter for counting the number of error lines in the received picture signal, and a signal generator for generating a response signal depending in accordance with the current transmission speed and the number of error lines. The current transmission speed is measured preferably by a communication time for one-page of picture signal and the error line is measured preferably page by page. The station on the sending side is provided with a signal discriminator for receiving the response signal backwardly transmitted and for discriminating the response signal, and retraining unit for performing retraining procedure by changing the transmission speed based on the response signal.

REFERENCES:
patent: 4578537 (1986-03-01), Faggin et al.
patent: 5050004 (1991-09-01), Morton, Jr.
patent: 5159465 (1992-10-01), Maemura et al.
patent: 5253079 (1993-10-01), Nakatani et al.
patent: 5351134 (1994-09-01), Yaguchi et al.

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