JPS5624885A - Audio muting circuit - Google Patents
Audio muting circuitInfo
- Publication number
- JPS5624885A JPS5624885A JP10007079A JP10007079A JPS5624885A JP S5624885 A JPS5624885 A JP S5624885A JP 10007079 A JP10007079 A JP 10007079A JP 10007079 A JP10007079 A JP 10007079A JP S5624885 A JPS5624885 A JP S5624885A
- Authority
- JP
- Japan
- Prior art keywords
- output
- circuit
- audio
- synchronizing signal
- audio output
- 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
- H04N5/50—Tuning indicators; Automatic tuning control
- H04N5/505—Invisible or silent tuning
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Receiver Circuits (AREA)
Abstract
PURPOSE:To avoid noise during search, by making 0 the audio output during search with the audio muting circuit and enabling the audio output automatically when the serach is stopped and the reception is made. CONSTITUTION:The synchronizing separation output 11 from the video amplifying and synchronization separation circuit 4 is given to the synchonization identifying circuit 9 to obtain the output 12 which is at high potential when the synchronizing signal can be confirmed and at ground potential when not identified. When this output 12 is fed to the switch circuit 10 and the synchronizing signal is not present, the input to the audio amplifier circuit 7 is interrupted and audio output is produced to the speaker 8 only when the synchronizing signal is present.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10007079A JPS5624885A (en) | 1979-08-06 | 1979-08-06 | Audio muting circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10007079A JPS5624885A (en) | 1979-08-06 | 1979-08-06 | Audio muting circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5624885A true JPS5624885A (en) | 1981-03-10 |
Family
ID=14264193
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10007079A Pending JPS5624885A (en) | 1979-08-06 | 1979-08-06 | Audio muting circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5624885A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3318497A1 (en) | 1982-05-23 | 1983-12-15 | Sony Corp., Tokyo | DISPLAY ARRANGEMENT FOR THE REPRODUCTION OF PROGRAM INFORMATION FROM A RECORDING CARRIER, IN PARTICULAR BY MEANS OF AN OPTICAL READING DEVICE |
JPS61176878U (en) * | 1985-04-20 | 1986-11-05 | ||
JPS647864A (en) * | 1987-06-30 | 1989-01-11 | Matsushita Electric Ind Co Ltd | Sound erasing device |
-
1979
- 1979-08-06 JP JP10007079A patent/JPS5624885A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3318497A1 (en) | 1982-05-23 | 1983-12-15 | Sony Corp., Tokyo | DISPLAY ARRANGEMENT FOR THE REPRODUCTION OF PROGRAM INFORMATION FROM A RECORDING CARRIER, IN PARTICULAR BY MEANS OF AN OPTICAL READING DEVICE |
JPS61176878U (en) * | 1985-04-20 | 1986-11-05 | ||
JPS647864A (en) * | 1987-06-30 | 1989-01-11 | Matsushita Electric Ind Co Ltd | Sound erasing device |
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