JPS55135346A - Signal detection system - Google Patents
Signal detection systemInfo
- Publication number
- JPS55135346A JPS55135346A JP4195879A JP4195879A JPS55135346A JP S55135346 A JPS55135346 A JP S55135346A JP 4195879 A JP4195879 A JP 4195879A JP 4195879 A JP4195879 A JP 4195879A JP S55135346 A JPS55135346 A JP S55135346A
- Authority
- JP
- Japan
- Prior art keywords
- control
- signals
- signal
- reproduced
- fixed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
Abstract
PURPOSE: To make mulfunctionless control possible by reproducing control signals, differing in frequency, recorded on a tape alternatey and by using for the control one signal of more than a fixed level among reproduced signals alternated as many as fixed.
CONSTITUTION: Control signals F1 and F2, differing in frequency, recorded on a tape alternately together with an audio signal are reproduced and then applied to rectifying integrating circuits 8 and 11 via BFP's 7 and 10 to generate pulse signals of widths corresponding to continuation periods of signals F1 and F2. As far as those pulse signals are generated, counter 13 is placed in an enable state via OR circuit 12 to count an integral output of signal F1 of more than a fixed level outputted by comparator 9, and the moment alternately repeated reproduced control signals are counted as many as fixed, monostable multivibrators 14 and 15 are triggered. Then, a signal generated only when the level of the reproduced control signal discriminated in terms of a noise, etc., due to reproduction outputs of different frequencies generated alternately is more than a fixed level is used for control, so that malfunctionless control over automatic reverse, etc., can be exercised.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4195879A JPS55135346A (en) | 1979-04-09 | 1979-04-09 | Signal detection system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4195879A JPS55135346A (en) | 1979-04-09 | 1979-04-09 | Signal detection system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55135346A true JPS55135346A (en) | 1980-10-22 |
Family
ID=12622689
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4195879A Pending JPS55135346A (en) | 1979-04-09 | 1979-04-09 | Signal detection system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55135346A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57138006A (en) * | 1981-02-20 | 1982-08-26 | T C Denshi Kk | Recording tape information code system |
KR100459964B1 (en) * | 1996-05-03 | 2005-02-07 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | Signal interruption detection circuit device |
-
1979
- 1979-04-09 JP JP4195879A patent/JPS55135346A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57138006A (en) * | 1981-02-20 | 1982-08-26 | T C Denshi Kk | Recording tape information code system |
KR100459964B1 (en) * | 1996-05-03 | 2005-02-07 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | Signal interruption detection circuit device |
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