发明名称 Pilot signal eliminating circuit
摘要 A pilot signal eliminating circuit for eliminating pilot signals from chrominance signals as part of video signals recorded on a magnetic recording medium. The pilot signals have different frequencies from one track to another neighboring track on the magnetic recording medium, and are previously superimposed on the chrominance signals, which in turn are previously changed to a lower frequency range. The circuit includes a frequency converter for shifting the frequency of the chrominance signals to a higher frequency range, a pilot signal take-out circuit for taking out the pilot signals by subtracting an output signal of the frequency converter delayed by one field from an undelayed output signal of the frequency converter and a subtraction circuit for subtracting an output of the pilot signal take-out circuit from an output of the frequency converter,
申请公布号 US5463474(A) 申请公布日期 1995.10.31
申请号 US19940293743 申请日期 1994.08.22
申请人 SONY CORPORATION 发明人 SHIMIZU, SHIGERU
分类号 H04N5/7826;G11B20/02;H04N9/79;H04N9/83;H04N9/87;(IPC1-7):H04N9/79 主分类号 H04N5/7826
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