JPS5693491A - Television signal light transmission device - Google Patents

Television signal light transmission device

Info

Publication number
JPS5693491A
JPS5693491A JP16922479A JP16922479A JPS5693491A JP S5693491 A JPS5693491 A JP S5693491A JP 16922479 A JP16922479 A JP 16922479A JP 16922479 A JP16922479 A JP 16922479A JP S5693491 A JPS5693491 A JP S5693491A
Authority
JP
Japan
Prior art keywords
output
signal
converted
subjected
carrier 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.)
Granted
Application number
JP16922479A
Other languages
Japanese (ja)
Other versions
JPH0127637B2 (en
Inventor
Makoto Kitazawa
Tomoji Motoyoshi
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP16922479A priority Critical patent/JPS5693491A/en
Publication of JPS5693491A publication Critical patent/JPS5693491A/en
Publication of JPH0127637B2 publication Critical patent/JPH0127637B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/22—Adaptations for optical transmission

Abstract

PURPOSE:To perform gain adjustment adapted to level fluctuation of the television signal, by utilizing that the carrier wave amplitude of the sound signal is fixed to separate this carrier wave by the filter and by providing an automatic gain adjusting circuit. CONSTITUTION:The video signal which is generated by television camera 1 and is subjected to amplitude modulation and the sound signal which is generated by microphone 2 and is subjected to frequency modulation are mixed by mixer 3. They are converted by electric-photo converter 4 and are transmitted through optical fiber transmission line 5. In the receiving side, this video signal is converted by photo-electric converter 6 and is output from output amplifier 8 through gain adjusting circuit 7. The carrier wave of the frequency modulation signal of sound is output from this output by band filter 10 and is subjected to peak detection in 11 and is converted to a DC value. This DC output is compared with reference voltage 12, and the control voltage of gain adjusting circuit 7 is so changed that their difference components are zero.
JP16922479A 1979-12-27 1979-12-27 Television signal light transmission device Granted JPS5693491A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16922479A JPS5693491A (en) 1979-12-27 1979-12-27 Television signal light transmission device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16922479A JPS5693491A (en) 1979-12-27 1979-12-27 Television signal light transmission device

Publications (2)

Publication Number Publication Date
JPS5693491A true JPS5693491A (en) 1981-07-29
JPH0127637B2 JPH0127637B2 (en) 1989-05-30

Family

ID=15882514

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16922479A Granted JPS5693491A (en) 1979-12-27 1979-12-27 Television signal light transmission device

Country Status (1)

Country Link
JP (1) JPS5693491A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7095961B2 (en) 2000-09-19 2006-08-22 Fujitsu Limited Optical communication system and optical receiver

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7095961B2 (en) 2000-09-19 2006-08-22 Fujitsu Limited Optical communication system and optical receiver

Also Published As

Publication number Publication date
JPH0127637B2 (en) 1989-05-30

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