发明名称 |
Blank detector for cassette tape player |
摘要 |
Digital signal processing (DSP) employing a differential mean calculation automatically distinguishes sections of blank tape from program material (such as music or voice) on cassette tapes. Blank tape produces a negligible differential mean value while program material produces substantial differential mean values. Thus, each differential mean is compared to a threshold so that a cassette player can be commanded to fast forward through a blank section of tape. A music envelope detector insures that low amplitude music signals are not detected as blank.
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申请公布号 |
US5400188(A) |
申请公布日期 |
1995.03.21 |
申请号 |
US19930162548 |
申请日期 |
1993.12.06 |
申请人 |
FORD MOTOR COMPANY |
发明人 |
HIRSCHENBERGER, FRANK M.;WHITECAR, JOHN E.;DIFIORE, NICHOLAS L. |
分类号 |
G11B15/087;G11B27/22;(IPC1-7):G11B5/09 |
主分类号 |
G11B15/087 |
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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