JPS6025337A - Signal transmission system - Google Patents
Signal transmission systemInfo
- Publication number
- JPS6025337A JPS6025337A JP13289083A JP13289083A JPS6025337A JP S6025337 A JPS6025337 A JP S6025337A JP 13289083 A JP13289083 A JP 13289083A JP 13289083 A JP13289083 A JP 13289083A JP S6025337 A JPS6025337 A JP S6025337A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- output
- demodulator
- transmitter
- frequency
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/44—Arrangements characterised by circuits or components specially adapted for broadcast
- H04H20/46—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95
- H04H20/47—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95 specially adapted for stereophonic broadcast systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/1646—Circuits adapted for the reception of stereophonic signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/44—Arrangements characterised by circuits or components specially adapted for broadcast
- H04H20/46—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95
- H04H20/47—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95 specially adapted for stereophonic broadcast systems
- H04H20/48—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95 specially adapted for stereophonic broadcast systems for FM stereophonic broadcast systems
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Stereo-Broadcasting Methods (AREA)
Abstract
Description
【発明の詳細な説明】
本発明はＦＭ放送受信ができるＦＭ受信機とこれと組合
せて使用するＩ” Ｍ送信機とからなる信号伝送システ
ムに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a signal transmission system comprising an FM receiver capable of receiving FM broadcasts and an I''M transmitter used in combination with the FM receiver.
従来のこの種システムを構成するＦＭ受信機、送信機は
第１図（ａｌおよび（ｂｌに示ず如く構成されてい〕こ
。The FM receiver and transmitter constituting a conventional system of this type are constructed as shown in FIG. 1 (al and bl).
すなわち送信機は、左側チャンネル信号と右側チャンネ
ル信号とを加算器１で加算してメイン信号を得、左側チ
ャンネル信号から右側チャンネル信号を差引く減算器２
、ザブキャリヤ発生器３およびダブルサイドバンド変調
器４とでサブ信号を得、サブキャリヤ発生器３の出力周
波数を１／２に分周する分周器５で分周してパイロット
信号を得て、メイン信号、ザブ信号とパイロット信号と
を加算器６で加算し、加算器６の出力をＦＭ変調器７で
ＦＭ変調してアンテナ８を介して送出するように構成さ
れていた。またＦＭ受信機はＦＭｆｆｉ−銅器１２およ
びマルチプレックスｔｊｆｔ調器１３を備え、左、右チ
ャンネル信号を得るように構成されていた。なお、１１
はアンテナである。That is, the transmitter includes an adder 1 that adds the left channel signal and the right channel signal to obtain the main signal, and a subtracter 2 that subtracts the right channel signal from the left channel signal.
, a subcarrier generator 3 and a double sideband modulator 4 obtain a subsignal, and a frequency divider 5 divides the output frequency of the subcarrier generator 3 into 1/2 to obtain a pilot signal. The main signal, the sub signal, and the pilot signal are added by an adder 6, and the output of the adder 6 is subjected to FM modulation by an FM modulator 7, and then transmitted via an antenna 8. The FM receiver was also equipped with an FMffi-copper 12 and a multiplex tjft tuner 13, and was configured to obtain left and right channel signals. In addition, 11
is an antenna.
従来の信号伝送システムは第１図（ａｌ 、 （ｂｌに
示すＦＭ送信機とＦＭ受信機とから構成されているため
、通常のＦＭ放送信号をＦＭ受信機で受信でき、かつＦ
Ｍ送信機からのＦＭ信号の受信も可能である。しかし通
常のＦＭ放送信号とＦＭ送信機の出力信号とに差別はな
く区別ができない欠点があるほかに、ＦＭ送信機は音声
信号しか伝送できない欠点があった。The conventional signal transmission system consists of an FM transmitter and an FM receiver as shown in Figures 1 (al and bl), so the FM receiver can receive normal FM broadcast signals, and
It is also possible to receive FM signals from M transmitters. However, in addition to the drawback that there is no difference between a normal FM broadcast signal and the output signal of an FM transmitter, there is also the drawback that the FM transmitter can only transmit audio signals.
本発明は」二記にかんがみなされたもので、上記の欠点
を解消し、通常のＦＭ放送を受信できかつＦＭ送信機の
出力を区別して受信でき、さらに音声信号以外の漬汁を
も伝送できる信号伝送システムを提供することを目的と
する。The present invention has been made in view of the above two points, and eliminates the above-mentioned drawbacks, can receive normal FM broadcasting, can distinguish and receive the output of an FM transmitter, and can also transmit pickles other than audio signals. The purpose is to provide a signal transmission system.
以下、本発明を実施例により説明する。The present invention will be explained below with reference to Examples.
第２図（ａ）および（ｂｊは本発明の伝送システムを構
成する送信機および受信機のブロック図である。FIGS. 2(a) and 2(bj) are block diagrams of a transmitter and a receiver that constitute the transmission system of the present invention.
第２図（ａｌに示した送信機は、第１図（ａｌに示した
送信機においてさら・に１／２分周器５で分周されたザ
ブキャリヤを可変周波数発振器９の出力でＡＭ変調する
ＡＭ変調器１０を備えており、ＡＭ変調器１０の出力を
加算器６に供給して、コンポジット信号中のパイロット
信号を低周波信号でＡＭ変調するように構成しである。The transmitter shown in FIG. 2 (al) performs AM modulation on the subcarrier whose frequency has been further divided by the 1/2 frequency divider 5 in the transmitter shown in FIG. 1 (al) with the output of the variable frequency oscillator 9. It is equipped with an AM modulator 10, and is configured to supply the output of the AM modulator 10 to an adder 6 to AM-modulate the pilot signal in the composite signal with a low frequency signal.
第２図（ｂ）に示した受信機は、第１図ｆｂ）に示した
受信機においてさらにＦＭ復調器１２の出力中のパイロ
ット信号に位相同期した出力を発生するＰＬＬ回路１４
と、ＦＭ復調器１２から出力されたコンポジット信号と
ＰＬＬ回路回路工高力とを乗算して同期検波器１５と、
同期検波器１５がら出力された検波出力中の不要成分を
除去するローパスフィルタ１６とを備えており、コンボ
シソ１−信号中のパイロットをＡＭ検波するように構成
しである。The receiver shown in FIG. 2(b) is the receiver shown in FIG.
A synchronous detector 15 multiplies the composite signal output from the FM demodulator 12 and the PLL circuit power,
It is equipped with a low-pass filter 16 for removing unnecessary components in the detection output outputted from the synchronous detector 15, and is configured to perform AM detection on the pilot in the combo signal 1- signal.
以上の如く構成した本発明の一実施例において送信機に
おいて加算器ｌによりメイン信号が、減算器２、サブキ
ャリヤ発生器３およびダブルザイドバンド変稠器４によ
りザブ信号が得られる。In one embodiment of the present invention constructed as described above, in the transmitter, the main signal is obtained by the adder 1, and the sub signal is obtained by the subtracter 2, subcarrier generator 3, and double side band transformer 4.
またさらに分周器５によりサブキャリヤの周波数は１／
２に分周されパイロット信号が作成され、可変周波数発
振器９の発振出力がＡＭ変調される。Furthermore, the frequency of the subcarrier is reduced to 1/ by the frequency divider 5.
The frequency is divided by 2 to create a pilot signal, and the oscillation output of the variable frequency oscillator 9 is AM-modulated.
このＡＭ変調されたパイロット信号は加算器６において
メイン信号とサブ信号と加算されて、ＦＭ変調器７でＦ
Ｍ変調されてアンテナ８がら送信される。This AM modulated pilot signal is added to the main signal and the sub signal in an adder 6, and is then added to the main signal and sub signal in an FM modulator 7.
The signal is M-modulated and transmitted from the antenna 8.
一方、受信機は送信機からの電波をアンテナ１１により
受けてＦＭ復調器１２、マルチプレックス復調器１３に
より受信、ｆｌ ８１１Ｈし左、右の音声信号が得られ
る。またＦＭ復調器１２の出力中のパイロット信号に位
相同期した出力がＰＬＬ回路１４から出力され、この出
力とＦＭｆｆｉａ器１２の出力すなわち、コンポジット
信号とが乗算され同期検波されて可変周波数発振器９の
出力が復調される。同期検波器１５でＡＭ検波された検
波出力ば１コーバスフイルタ１６によって不要成分が除
去されてコントロール信号として出力される。また通常
のＦＭ放送は、ＦＭ復ＩｉＩ！Ｊ″１５１２およびマル
チプレックス復ｉ器１３により復調され、ＦＭ放送の受
信もできる。この場合にバ・ｆロット信号はＡＭ変調さ
れていないためにコントロール信号は出力されない。On the other hand, the receiver receives radio waves from the transmitter through the antenna 11, receives them through the FM demodulator 12 and the multiplex demodulator 13, and receives them as fl 811H to obtain left and right audio signals. Further, an output that is phase-synchronized with the pilot signal being output from the FM demodulator 12 is output from the PLL circuit 14, and this output is multiplied by the output of the FMffia unit 12, that is, the composite signal, and synchronously detected, and output from the variable frequency oscillator 9. is demodulated. The detection output obtained by the AM detection by the synchronous detector 15 has unnecessary components removed by the corpus filter 16, and is output as a control signal. Also, regular FM broadcasting is FM FukuiIi! It is demodulated by J'' 1512 and multiplex demodulator 13, and FM broadcasting can also be received.In this case, since the barot signal is not AM modulated, no control signal is output.
したがってパイロット信号のＡ、Ｍ変調成分の有無、す
なわちコントロール信号の有無により通常のＦＭ放送と
、第２図（ａｌの送信機からの送信放送とを区別するこ
とができ、パイロット信号をＡＭ変調する周波数を変え
ることで、たとえばミューティング信号、音便制御信号
、機能変更信号を合せて伝送することもできる。Therefore, depending on the presence or absence of A and M modulation components of the pilot signal, that is, the presence or absence of a control signal, it is possible to distinguish between normal FM broadcasting and broadcasting transmitted from the transmitter shown in Figure 2 (al). By changing the frequency, for example, muting signals, tone control signals, and function change signals can also be transmitted together.
また、以上の実施例において、パイロット信号をＡＭ変
調し、これをＰ Ｌ Ｌ回路１４と同期検波器１５とで
検波した場合を例示したが、パイロット信号とその近傍
の周波数を急峻に抽出するフィルタを用いてその出力を
ＡＭ検波することで同様に復調でき、本発明の一実施例
の場合と同様に動作する。Furthermore, in the above embodiments, the case where the pilot signal is AM modulated and detected by the PLL circuit 14 and the synchronous detector 15 has been exemplified. It can be similarly demodulated by performing AM detection on the output using , and operates in the same manner as in the embodiment of the present invention.
以上説明した如く本発明によれば通常にＦＭ放送を受信
でき、ＦＭ受信機とこれと組合−已て使用するＦＭ送信
機からなる信号伝送システムが構成でき、かつ通常のＦ
Ｍ放送信号とＦＭ送信機からの出力信号との区別ができ
る。さらに音声信号以外のミューティング制御信号、音
量制御信号、機能切換信号等を伝送することもできる。As explained above, according to the present invention, it is possible to normally receive FM broadcasts, and it is possible to construct a signal transmission system consisting of an FM receiver and an FM transmitter used in conjunction with the FM broadcast.
It is possible to distinguish between the M broadcast signal and the output signal from the FM transmitter. Furthermore, muting control signals, volume control signals, function switching signals, etc. other than audio signals can also be transmitted.
第１図（ａｌおよび（ｂ）は従来の信号伝送システムを
構成する送信機および受信機のブロック図、第２図（ａ
ｌおよび（ｂ）は本発明の一実施例の信号伝送システム
を構成する送信機および受信機のブロック図である。
１および６・・・加算器、２・・・減算器、３・・・サ
ブキャリヤ発生器、４・・・ダブルサイドバンド変調器
、５・・・分周器、６・・・サブキャリヤ発生器、７・
・・ＦＭ変調器、９・・・可変周波数発振器、１０・・
・ＡＭ変調器、１２・・・ＦＭ復調器、１３・・・マル
チプレックス復調器、１４・・・ＰＬＬ回路、１５・・
・同期検波器、１６・・・ローパスフィルタ。
特許出願人 パイオニア株式会社Figures 1 (al and b) are block diagrams of a transmitter and receiver that constitute a conventional signal transmission system, and Figure 2 (a)
1 and (b) are block diagrams of a transmitter and a receiver that constitute a signal transmission system according to an embodiment of the present invention. 1 and 6...Adder, 2...Subtractor, 3...Subcarrier generator, 4...Double sideband modulator, 5...Frequency divider, 6...Subcarrier generation Vessel, 7.
...FM modulator, 9...Variable frequency oscillator, 10...
・AM modulator, 12...FM demodulator, 13...multiplex demodulator, 14...PLL circuit, 15...
- Synchronous detector, 16...Low pass filter. Patent applicant Pioneer Corporation
Claims (1)
ＡＭ変δｉｌＪ ｆ、た信υ−とを加算してＦＭ変調し
たうえ送信する送信機と、ＦＭ復調器とＦＭ復調器出力
をステレオｆｆｉ ｉＭＩするマルチプレックス復調器
とＦＭ復調器の出力コンボジフト信号中のパイロット信
号をＡＭ検波するＡＭ検波手段とを備えてなる受信機と
１．からなることを特徴とする信号伝送システム。A transmitter that adds AM modulation δilJ f and signal υ- to the main signal, sub signal, and pilot signal using low frequency signals, FM modulates the signal, and then transmits it, and performs stereo ffi iMI on the FM demodulator and the FM demodulator output. 1. A receiver comprising a multiplex demodulator and an AM detection means for AM detecting a pilot signal in a combo shift signal output from an FM demodulator; A signal transmission system comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13289083A JPS6025337A (en) | 1983-07-22 | 1983-07-22 | Signal transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13289083A JPS6025337A (en) | 1983-07-22 | 1983-07-22 | Signal transmission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6025337A true JPS6025337A (en) | 1985-02-08 |
Family
ID=15091942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13289083A Pending JPS6025337A (en) | 1983-07-22 | 1983-07-22 | Signal transmission system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6025337A (en) |
-
1983
- 1983-07-22 JP JP13289083A patent/JPS6025337A/en active Pending
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