JPS5550786A - Control signal discriminator in voice multiplex broadcasting receiver - Google Patents
Control signal discriminator in voice multiplex broadcasting receiverInfo
- Publication number
- JPS5550786A JPS5550786A JP12381578A JP12381578A JPS5550786A JP S5550786 A JPS5550786 A JP S5550786A JP 12381578 A JP12381578 A JP 12381578A JP 12381578 A JP12381578 A JP 12381578A JP S5550786 A JPS5550786 A JP S5550786A
- Authority
- JP
- Japan
- Prior art keywords
- change
- control signal
- filter
- over
- modulated
- 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.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 abstract 2
- 238000006073 displacement reaction Methods 0.000 abstract 1
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
- H04N5/607—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals for more than one sound signal, e.g. stereo, multilanguages
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Receiver Circuits (AREA)
Abstract
PURPOSE:To remove the influence slight displacement in the tuning frequency of the filter by using a filter generating change in the transmission phase characteristics at substantially intermediate frequency of both the modulated frequencies in order to detect the modulated frequency of the control signal. CONSTITUTION:The rectifying output voltage level of the control signal (b) is discriminated by the comparison switching circuit 21 to obtain the change-over signal (m). The amplitude detector 4 of output (c) is fed to the filter circuit 22 generating the change in transmission phase charactristics between 922 5Hz and 982, 5Hz, thereby the change over signal (n) for discriminating whether the modulated frequency is 922.5Hz or 982.5Hz. These two change-over signals (m), (n) are fed to the change-over switch circuit 13 to operate the desired control signal discrimination and when the level of the control signal does not reach the predetermined level, it is enforcibly monoral operated. Accordingly, if there is change slightly in the filter characteristics, both the modulated frequencies can be effectively discriminated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53123815A JPS60832B2 (en) | 1978-10-06 | 1978-10-06 | Control signal discriminator in audio multiplex broadcast receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53123815A JPS60832B2 (en) | 1978-10-06 | 1978-10-06 | Control signal discriminator in audio multiplex broadcast receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5550786A true JPS5550786A (en) | 1980-04-12 |
| JPS60832B2 JPS60832B2 (en) | 1985-01-10 |
Family
ID=14870014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP53123815A Expired JPS60832B2 (en) | 1978-10-06 | 1978-10-06 | Control signal discriminator in audio multiplex broadcast receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60832B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01103138U (en) * | 1987-12-25 | 1989-07-12 |
-
1978
- 1978-10-06 JP JP53123815A patent/JPS60832B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60832B2 (en) | 1985-01-10 |
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