JPS5726973A - Noise rejecting circuit - Google Patents
Noise rejecting circuitInfo
- Publication number
- JPS5726973A JPS5726973A JP10110780A JP10110780A JPS5726973A JP S5726973 A JPS5726973 A JP S5726973A JP 10110780 A JP10110780 A JP 10110780A JP 10110780 A JP10110780 A JP 10110780A JP S5726973 A JPS5726973 A JP S5726973A
- Authority
- JP
- Japan
- Prior art keywords
- noise
- audio
- circuit
- detection
- signal
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/60—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
Abstract
PURPOSE:To reduce noise without voice and audio buzz sound at nonsignal and detuning, by connecting a tuning circuit tuned to frequency of a multiple of horizontal scanning frequency to the output of audio intermediate frequency detection, and attenuating the audio detected output through the detection of noise outside the audio band. CONSTITUTION:When a tuner input signal becomes small or no signal is present, a DC voltage in proportion to the noise component is obtained at an output terminal of a detection circuit 8. When this voltage is at a certain level or more, the gain of an audio amplifier 6 is attenuated in response to amount of noise to reduce the noise to a level or lower. If detuning is made near a broadcasting signal, a horizontal scanning frequency and a signal of multiple of it are picked up from a tuning amplifying circuit 7, and when the buzz component is a level or more, the gain of the circuit 6 is attenuated or cut off depending on the amount of buzz component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10110780A JPS5726973A (en) | 1980-07-25 | 1980-07-25 | Noise rejecting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10110780A JPS5726973A (en) | 1980-07-25 | 1980-07-25 | Noise rejecting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5726973A true JPS5726973A (en) | 1982-02-13 |
Family
ID=14291844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10110780A Pending JPS5726973A (en) | 1980-07-25 | 1980-07-25 | Noise rejecting circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5726973A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0629054A2 (en) * | 1993-06-08 | 1994-12-14 | Matsushita Electric Industrial Co., Ltd. | Noise suppressing apparatus capable of preventing deterioration in high frequency signal characteristic after noise suppression and in balanced signal transmitting system |
-
1980
- 1980-07-25 JP JP10110780A patent/JPS5726973A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0629054A2 (en) * | 1993-06-08 | 1994-12-14 | Matsushita Electric Industrial Co., Ltd. | Noise suppressing apparatus capable of preventing deterioration in high frequency signal characteristic after noise suppression and in balanced signal transmitting system |
| EP0629054A3 (en) * | 1993-06-08 | 1997-01-29 | Matsushita Electric Ind Co Ltd | Noise suppressing apparatus capable of preventing deterioration in high frequency signal characteristic after noise suppression and in balanced signal transmitting system. |
| US5982901A (en) * | 1993-06-08 | 1999-11-09 | Matsushita Electric Industrial Co., Ltd. | Noise suppressing apparatus capable of preventing deterioration in high frequency signal characteristic after noise suppression and in balanced signal transmitting system |
| KR100327632B1 (en) * | 1993-06-08 | 2002-07-06 | 마츠시타 덴끼 산교 가부시키가이샤 | Noise suppression device |
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