
US Patent No: 4,962,521
Number of patents in Portfolio can not be more than 2000
Apparatus for still picture video telephone apparatus and methods for transmitting and displaying still picture image for use therein
Stats
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Oct 9, 1990
Issued date -
Dec 16, 1988
filing date -
07/285,816
serial no -
Expired
status
Importance
Abstract
A still picture video telephone apparatus adapted to transmit and receive, through a telephone line, still picture information from a television camera or the like, during a telephone call, includes a picture memory for storing a plurality of pages of picture information consisting of a camera-taken picture memory portion which rewrites still picture information input therein delivered from the television camera at intervals of a predetermined period, a self-prepared picture memory portion which stores desired still picture information until arrival of a rewrite instruction, and an incoming picture memory portion which sequentially rewrites still picture information therein upon receipt of still picture information when its storage regions are filled up, memory region input information for setting up regions for the self-prepared picture memory portion and the incoming picture memory portion within the picture memory, and picture memory control circuit for controlling still picture information input to and output from the picture memory based on the memory region information, wherein the picture memory is capable of storing a plurality pages of still picture information and allocating memory regions to the self-prepared picture memory portion and the incoming picture memory portion in various ways.
First Claim
Related Publications
International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 4,258,387 Video telephone | 98 | 1979 | |
| 4,485,400 Video telephone | 134 | 1982 | |
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| 4,715,059 Conversational video phone | 87 | 1985 | |
| 4,739,413 Video-optimized modulator-demodulator with adjacent modulating amplitudes matched to adjacent pixel gray values | 14 | 1987 | |
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| 4,291,198 General-purpose electronic telephone station set | 105 | 1979 | |