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专利名称：Video-signal transmitting and receiving
apparatus and method thereof
发明人：Sakamoto, Noriya, c/o Intellectual Property
Div.,Ishikawa, Tatsuya c/oIntellectualProperty Div.
申请号：EP94102665.0申请日：19940222公开号：EP0618729B1公开日：19981104
摘要：This invention provides a system capable of performing compatible transmittingand receiving processes, regardless of whether a TV signal on the transmission side is ahigh-resolution signal or a low-resolution signal or of whether the reception side is ahigh-resolution display unit or a low-resolution display unit. On the transmission side, afrequency division circuit (150) divides a high-resolution TV signal into signals in a pluralityof frequency bands. The signals in each frequency band are converted into signals of ahorizontal and vertical low band (a low-resolution TV signal band). The converted signalsare coded by coding units (110-113), which transmit the coded signals. On the receptionside, the coded signals multiplexed on the transmission side are separated and decodedat decoding units (202-205). A frequency synthesizing circuit (220) restores the frequencybands of the decoded signals to the original bands. Then, the resulting signals aredisplayed with a high resolution. A low-resolution signal is coded and then transmitted.The coded signal is decoded on the reception side. The decoded signal is interpolated atan interpolation circuit (270). The interpolated signal is then displayed on a high-
resolution display unit.
申请人：TOSHIBA KK
地址：JP
国籍：JP
代理机构：Henkel, Feiler, Hänzel
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