发明名称 Apparatus and method for preventing unauthorized dubbing of a recorded signal
摘要 In a reproducing and recording or dubbing system there are provided a reproducing apparatus for reproducing from a first tape recorded composite data which includes pulse code modulated information data mixed with control data having first and second states for indicating that re-recording of the associated information data is to be prevented and permitted, respectively, a recording apparatus for recording on a second tape composite data reproduced from the first tape, a detector for detecting the states of the control data in the composite data reproduced from the first tape, a generator for generating a dubbing protect control signal in response to detection of the first state of the control data, a line for transmitting the reproduced composite data from the reproducing apparatus to the recording apparatus, and a switch interposed in the line for transmitting the reproduced composite data and being operated by the dubbing protect control signal to interrupt the transmission of the reproduced composite data to the recording apparatus and thereby prevent recording or copying of the reproduced composite data on the second tape.
申请公布号 US4775901(A) 申请公布日期 1988.10.04
申请号 US19860937017 申请日期 1986.12.02
申请人 SONY CORPORATION 发明人 NAKANO, KENJI
分类号 G11B15/02;G11B5/86;G11B20/00;G11B20/10;H04N5/913;(IPC1-7):G11B15/04 主分类号 G11B15/02
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