Picture/audio signal transmission system
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United States of America Patent
Stats
-
Feb 17, 1981
Grant Date -
N/A
app pub date -
Dec 1, 1978
filing date -
Dec 2, 1977
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A center-to-end type information service system utilizing the public telephone networks that are fundamental communication media of nation-wide scale is disclosed in which desired information is requested from the terminal side to the center by means of a telephone set or simplified keyboard and then delivered to and received by a TV receiver. A part of the center functions is transferred together with the exchange function to a subcenter located near the terminal. Thus, the length of transmission path connecting the center to terminals becomes shorter and the cost of the whole system can be cut down.
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Family
International Classification(s)
Cited Art Landscape
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