发明名称 |
System of transmitting high-definition television pictures via a relatively narrow passband channel, and also a transmitter and a receiver suitable for the system |
摘要 |
A system for use with D2-MAC/ packets contains, on the one hand, a transmitting part formed by a pick-up member (1) for producing said pictures constituted by a plurality of picture elements or samples distributed over even and odd lines, a filter member (22) for filtering the samples of the filtered samples, a sub-sampling member (20) for taking certain samples from the output of the filter member and a transmission circuit (5) for transmitting through the channel the certain samples taken and, on the other hand, at least one receving part constituted by a receiving circuit (10), an interpolation member (41) for recovering samples on the basis of the certain samples received, and a first display circuit (50) for the recovery of a high-definition picture; the sub-sampling member (20) is designed to take from the pictures supplied by the pick-up member a predetermined number of samples in three consecutive fields.
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申请公布号 |
US4935813(A) |
申请公布日期 |
1990.06.19 |
申请号 |
US19880173681 |
申请日期 |
1988.03.24 |
申请人 |
U.S. PHILIPS CORPORATION |
发明人 |
FONSALAS, FREDERIC L. J.;LEJARD, JEAN-YVES L.;HAYET, PASCAL F. P.;LE QUEAU, MARCEL R. |
分类号 |
H04N11/00;H04N7/015;H04N7/12;H04N7/26;H04N11/24 |
主分类号 |
H04N11/00 |
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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