JPS645238A - 2nd sound multiplex broadcast equipment for fm broadcast - Google Patents

2nd sound multiplex broadcast equipment for fm broadcast

Info

Publication number
JPS645238A
JPS645238A JP16210887A JP16210887A JPS645238A JP S645238 A JPS645238 A JP S645238A JP 16210887 A JP16210887 A JP 16210887A JP 16210887 A JP16210887 A JP 16210887A JP S645238 A JPS645238 A JP S645238A
Authority
JP
Japan
Prior art keywords
frequency
subcarrier
psk
modulator
broadcast
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
JP16210887A
Other languages
Japanese (ja)
Inventor
Akira Ito
Takashi Matsuura
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.)
NEC Corp
Original Assignee
NEC Corp
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 NEC Corp filed Critical NEC Corp
Priority to JP16210887A priority Critical patent/JPS645238A/en
Publication of JPS645238A publication Critical patent/JPS645238A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To send voice and information with a large capacity by using a binary or a quaternary PSK so as to modulate a 2nd subcarrier whose upper limit is set to nearly middle of the occupied band width of FM wave as the coded voice signal and superimposing the result. CONSTITUTION:A PSK modulator 3 multiplies a 19kHz of a pilot signal from a stereo modulator 4 by four to generate the 2nd subcarrier of a frequency of 76kHz and the result is subject to PSK modulation by a 2nd voice signal coded by a VOCODER 2. The output of the stereo modulator 4 and the output of the PSK modulator 3 are synthesized by a signal synthesis section 7. The frequency of the 2nd subcarrier is formed such that its lower limit is selected by the upper limit frequency of the stereo subchannel and its upper limit is limited by the specification of the occupied band width and its frequency is nearly a middle frequency of the frequency band and the PSK modulation of the 2nd subcarrier by the 2nd voice is applied by utilizing the frequency band sufficiently. Thus, the transmission information quantity is increased than a conventional system.
JP16210887A 1987-06-29 1987-06-29 2nd sound multiplex broadcast equipment for fm broadcast Pending JPS645238A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16210887A JPS645238A (en) 1987-06-29 1987-06-29 2nd sound multiplex broadcast equipment for fm broadcast

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16210887A JPS645238A (en) 1987-06-29 1987-06-29 2nd sound multiplex broadcast equipment for fm broadcast

Publications (1)

Publication Number Publication Date
JPS645238A true JPS645238A (en) 1989-01-10

Family

ID=15748197

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16210887A Pending JPS645238A (en) 1987-06-29 1987-06-29 2nd sound multiplex broadcast equipment for fm broadcast

Country Status (1)

Country Link
JP (1) JPS645238A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2100731A2 (en) 2008-03-11 2009-09-16 Fujifilm Corporation Lithographic printing plate precursor and method of lithographic printing
WO2015046297A1 (en) 2013-09-26 2015-04-02 富士フイルム株式会社 Resin composition for laser engraving, flexographic printing original plate for laser engraving, method for producing flexographic printing original plate for laser engraving, flexographic printing plate, and method for making flexographic printing plate

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49100901A (en) * 1973-11-08 1974-09-24
JPS5549465A (en) * 1978-08-08 1980-04-09 Clarke Walter Wilson Hugh Lock for door and method of opening*closing said lock

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49100901A (en) * 1973-11-08 1974-09-24
JPS5549465A (en) * 1978-08-08 1980-04-09 Clarke Walter Wilson Hugh Lock for door and method of opening*closing said lock

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2100731A2 (en) 2008-03-11 2009-09-16 Fujifilm Corporation Lithographic printing plate precursor and method of lithographic printing
WO2015046297A1 (en) 2013-09-26 2015-04-02 富士フイルム株式会社 Resin composition for laser engraving, flexographic printing original plate for laser engraving, method for producing flexographic printing original plate for laser engraving, flexographic printing plate, and method for making flexographic printing plate

Similar Documents

Publication Publication Date Title
ES2080061T3 (en) APPARATUS AND PROCEDURE FOR SUPPLYING DIGITAL AUDIO FREQUENCY IN THE FM BROADCASTING BAND.
WO1994016506A3 (en) Digital broadcasting sharing the channel with an analog fm transmission
CA2206766A1 (en) A practical means for digital generation and combination of a multiplicity of cdma/fdma signals
GB9500285D0 (en) A method of labelling an audio signal
ES8606771A1 (en) Television transmissions.
GB1411994A (en) Signal matrixing for directional reproduction of sound
US3814858A (en) Multiplex system employing multiple quadrature subcarriers
JPS645238A (en) 2nd sound multiplex broadcast equipment for fm broadcast
SG144728A1 (en) An in-band-on-channel broadcast system for digital data
DE2155336A1 (en) Method for sending and receiving four-channel stereophony as well as sending and receiving system for four-channel stereophony
US3881063A (en) System for selectively receiving either 4-channel or- 2-channel stereophonic broadcastings
DE4113584A1 (en) METHOD AND DEVICE FOR TRANSMITTING THE DIGITAL SOUND SIGNALS FROM TON STUDIOS TO THE INDIVIDUAL SENDING STATIONS OF A BROADCAST TRANSMITTER NETWORK
JPS57141004A (en) Recording system for multichannel sound signal
US4683565A (en) Phase controlled frequency division multiplexed communications system
US3896269A (en) Four channel stereophonic broadcasting system and receiving device
EP0393856A3 (en) Modulation of adjacent channels
ATE6185T1 (en) TELEVISION RECEIVER WITH A SOUND CHANNEL WORKING ACCORDING TO THE DIFFERENTIAL CARRIER METHOD.
JPS6315777B2 (en)
JPH0641405Y2 (en) Multiplexer for stereo broadcasting
JPS54117602A (en) Sound signal transmission unit
RU2226038C2 (en) Method for broadcasting frequency-modulated stereo radio signal in uhf and vhf bands in pilottone system
JPS56140783A (en) Multiplex broadcast system
GB2042849A (en) Encoding of information
ES8404593A1 (en) Television transmission method, transmitter and receiver with a plurality of sound channels.
JPS643229U (en)