发明名称 Recording/ reproducing apparatus and input/ output device
摘要 A recording/reproducing apparatus is provided for effecting digital processing to convert an analog video signal into a digital signal without losing character data superimposed over a vertical blanking period of the analog video signal. The recording/reproducing apparatus for converting the analog video signal into the digital signal and recording/reproducing the converted digital signal has a detector which detects character data, which is superimposed over the vertical blanking period of the received analog video signal, at the recording time. A superimposer which encodes the detected character data and superimposes the encoded character data over a digital signal from which the character data was removed, whereby the digital signal with the superimposed character data is recorded on the recording media. There is also a detector which detects first copy guard data superimposed over the vertical blanking period and second copy guard data superimposed over a color burst signal; and an adder which adds the two detected copy guard data to a signal reproduced from the recording media.
申请公布号 US6587638(B1) 申请公布日期 2003.07.01
申请号 US19990399085 申请日期 1999.09.20
申请人 HITACHI, LTD. 发明人 WATANABE KATSUYUKI;NISHIJIMA HIDEO;OKAMOTO HIROO;SASAKI MOTOYOSHI
分类号 G11B20/04;H04N5/85;H04N5/913;H04N9/79;(IPC1-7):H04N5/91 主分类号 G11B20/04
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