发明名称 |
COLOR IMAGE TRANSMISSION SYSTEM |
摘要 |
A color still picture transmission system includes color visible telephones which are coupled to each other through a telephone network. In succession to luminance signal data of all picture elements forming a whole screen, respective averaged values of two kinds of color difference signal data of four picture elements being adjacent to each other are sent from the color visible telephone at a sending party to the color visible telephone at a receiving party through the telephone network, a modem and a network control unit. In the color visible telephone at the receiving party, a monochromatic still picture is first displayed on a color CRT in accordance with the luminance signal data of all the picture elements which are precedingly received and stored in a video memory, and thereafter, the monochromatic still picture is sequentially changed to a color still picture by writing the same averaged color difference signal data in storage positions of the video memory corresponding to four picture elements being adjacent to each other.
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申请公布号 |
CA1335904(C) |
申请公布日期 |
1995.06.13 |
申请号 |
CA19890613124 |
申请日期 |
1989.09.26 |
申请人 |
SANYO ELECTRIC CO., LTD. |
发明人 |
NAKASHIMA, HISAHARU;HAYASAKI, HIROYUKI;SUZUKI, MASAMI;SAITO, YOSHINORI;MATUYAMA, HISASI |
分类号 |
H04N1/64;H04N7/14;(IPC1-7):H04M11/06;H04N1/46 |
主分类号 |
H04N1/64 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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