JPS647780A - Television voice multiplex tuner - Google Patents
Television voice multiplex tunerInfo
- Publication number
- JPS647780A JPS647780A JP62162609A JP16260987A JPS647780A JP S647780 A JPS647780 A JP S647780A JP 62162609 A JP62162609 A JP 62162609A JP 16260987 A JP16260987 A JP 16260987A JP S647780 A JPS647780 A JP S647780A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- outputted
- bit digital
- subcarrier wave
- 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)
- Stereo-Broadcasting Methods (AREA)
Abstract
PURPOSE:To digitally detect a composite signal with a simple constitution by A/D-converting a composite signal to plural bits, and FM-detecting a subvoice signal from a subcarrier wave which is a one-bit digital FM signal indicating a polarity among the plural bits. CONSTITUTION:An analog composite signal including a subcarrier wave frequency-modulated by a subvoice signal and a main voice signal which is inputted to a terminal 1, is converted to a plural-bit digital composite signal in an A/D converter circuit 2. A BPF 3 separates a subcarrier wave component from an output from the circuit 2. A detection circuit 4 detects such one bit as indicating the polarity from data outputted from the BPF 3. Thus detected one-bit digital signal is FM-detected in an FM detection circuit 5, subjected to a level control circuit 6, then inputted to a matrix synthesizing circuit 8 where it is synthesized with a main voice signal outputted from a delay circuit 7. A left signal is outputted from an adding circuit 81, and a right signal is outputted from a substraction circuit 82.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62162609A JPS647780A (en) | 1987-06-30 | 1987-06-30 | Television voice multiplex tuner |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62162609A JPS647780A (en) | 1987-06-30 | 1987-06-30 | Television voice multiplex tuner |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS647780A true JPS647780A (en) | 1989-01-11 |
Family
ID=15757851
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62162609A Pending JPS647780A (en) | 1987-06-30 | 1987-06-30 | Television voice multiplex tuner |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS647780A (en) |
-
1987
- 1987-06-30 JP JP62162609A patent/JPS647780A/en active Pending
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