JPS5498119A - Buzz erasing circuit unit of television receiver - Google Patents
Buzz erasing circuit unit of television receiverInfo
- Publication number
- JPS5498119A JPS5498119A JP507578A JP507578A JPS5498119A JP S5498119 A JPS5498119 A JP S5498119A JP 507578 A JP507578 A JP 507578A JP 507578 A JP507578 A JP 507578A JP S5498119 A JPS5498119 A JP S5498119A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- buzz
- becomes
- signals
- phase
- 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
- Television Receiver Circuits (AREA)
Abstract
PURPOSE: To erase buzz by inverting the polarity of a part of video signals and applying video signals to a sound circuit.
CONSTITUTION: Video detected signal (a) is applied to non-linear circuit 20 and becomes a signal shown in (c). This signal (c) is differetiated by a differentiating circuit and becomes a differentiated signal (d). Differentiated signal (d) is phase-shifted by a phase shifter and becomes signal (e), and further, signal (e) is level-adjusted and becomes signal (f). By the operation above, the phase and the amplitude of signal (f) has the opposite phase and the same amplitude in comparison with buzz signal (b) included in sound detected signals. Then, signal (f) is applied to an operation circuit together with sound detected signals, thereby obtaining sound signals with buzz erased.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP507578A JPS5498119A (en) | 1978-01-19 | 1978-01-19 | Buzz erasing circuit unit of television receiver |
US06/003,539 US4237485A (en) | 1978-01-19 | 1979-01-15 | Buzz cancelling system for television receiver |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP507578A JPS5498119A (en) | 1978-01-19 | 1978-01-19 | Buzz erasing circuit unit of television receiver |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5498119A true JPS5498119A (en) | 1979-08-02 |
Family
ID=11601259
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP507578A Pending JPS5498119A (en) | 1978-01-19 | 1978-01-19 | Buzz erasing circuit unit of television receiver |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5498119A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5198904A (en) * | 1991-02-25 | 1993-03-30 | Comark Communications, Inc. | Aural carrier correction system and method |
US5430498A (en) * | 1994-03-01 | 1995-07-04 | Comark Communications, Inc. | Selective intermodulation correction system |
-
1978
- 1978-01-19 JP JP507578A patent/JPS5498119A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5198904A (en) * | 1991-02-25 | 1993-03-30 | Comark Communications, Inc. | Aural carrier correction system and method |
US5430498A (en) * | 1994-03-01 | 1995-07-04 | Comark Communications, Inc. | Selective intermodulation correction system |
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