JPS57170678A - Sound demodulating system for television receiver - Google Patents

Sound demodulating system for television receiver

Info

Publication number
JPS57170678A
JPS57170678A JP56054900A JP5490081A JPS57170678A JP S57170678 A JPS57170678 A JP S57170678A JP 56054900 A JP56054900 A JP 56054900A JP 5490081 A JP5490081 A JP 5490081A JP S57170678 A JPS57170678 A JP S57170678A
Authority
JP
Japan
Prior art keywords
output
frequency
circuit
modulating
amplitude
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
Application number
JP56054900A
Other languages
Japanese (ja)
Inventor
Koichi Kido
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP56054900A priority Critical patent/JPS57170678A/en
Publication of JPS57170678A publication Critical patent/JPS57170678A/en
Pending legal-status Critical Current

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
    • H04N5/62—Intercarrier circuits, i.e. heterodyning sound and vision carriers

Abstract

PURPOSE:To reproduce sound signals of high quality through an inter-carrier system by removing an amplitude modulating component and a frequency modulating component included in a video signal. CONSTITUTION:Video intermediate frequency (VIF) obtained from a VIF circuit is divided into 1/10-1/100 frequency by limiter and dividing operations of a divider circuit 14. At that time, both amplitude and phase modulating components included in a video component are reduced. An output from the circuit 14 drives a synchronous generator 15, which generates a signal synchronizing with the output frequency of a tuner 12 and including no amplitude modulating and phase modulating components. The output of the generator 15 is mixed with the output of a sound IF amplifier circuit 16 by a mixer 17 to be converted into the 2nd intermediate frequency, which is demodulated by a demodulator 18, obtaining the sound signals of high quality including no noise.
JP56054900A 1981-04-10 1981-04-10 Sound demodulating system for television receiver Pending JPS57170678A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56054900A JPS57170678A (en) 1981-04-10 1981-04-10 Sound demodulating system for television receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56054900A JPS57170678A (en) 1981-04-10 1981-04-10 Sound demodulating system for television receiver

Publications (1)

Publication Number Publication Date
JPS57170678A true JPS57170678A (en) 1982-10-20

Family

ID=12983472

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56054900A Pending JPS57170678A (en) 1981-04-10 1981-04-10 Sound demodulating system for television receiver

Country Status (1)

Country Link
JP (1) JPS57170678A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0678784U (en) * 1992-03-13 1994-11-04 進也 関 BBQ cassette stove drawer drawer cooler box

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0678784U (en) * 1992-03-13 1994-11-04 進也 関 BBQ cassette stove drawer drawer cooler box

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