JPS6198027A - Multiple access order circuit - Google Patents

Multiple access order circuit

Info

Publication number
JPS6198027A
JPS6198027A JP21915484A JP21915484A JPS6198027A JP S6198027 A JPS6198027 A JP S6198027A JP 21915484 A JP21915484 A JP 21915484A JP 21915484 A JP21915484 A JP 21915484A JP S6198027 A JPS6198027 A JP S6198027A
Authority
JP
Japan
Prior art keywords
code
circuit
signal
burst
speech
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
JP21915484A
Other languages
Japanese (ja)
Inventor
Hisashi Tada
多田　壽
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 JP21915484A priority Critical patent/JPS6198027A/en
Publication of JPS6198027A publication Critical patent/JPS6198027A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Relay Systems (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

PURPOSE:To eliminate an echo back state without any break of speech by transmitting a transmit speed signal together with its added station code, and regenerating a received speech signal during reception only when a received speech burst signal does not coincides with the station code. CONSTITUTION:The station code 3 from a code generating circuit 2 is added to the transmit speech signal 1 by a code adding circuit 4 and the composite signal is sent out as a transmit speech signal burst 5. The received speech signal burst 6, on the other hand, is compared by a code comparing circuit 7 with the station code 13 from the code generating circuit 2 and only when they do not coincide with each other, the regenerated receive speech signal 8 is outputted. Therefore, there is no echo-back state and the speech never becomes unnatural.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、マルチブルアクセス打合せ回路、特に複数の
局にて同一の回線を共用する場合の自局発ｆ−侶号のエ
コーバッグを防ぐためのマルチブルアクセス打合せ回路
に関するものである。[Detailed Description of the Invention] [Industrial Field of Application] The present invention is directed to a multiple access meeting circuit, in particular, to prevent echo bag of the f-mail address originating from the local station when the same line is shared by multiple stations. The present invention relates to a multiple access meeting circuit for

〔従来の技術〕[Conventional technology]

従来、この種のマルチブルアクセス打合せ回線において
車−の回線を使用する場合、受信側にて常時音声信号を
受信可としておく回路において、自局発音声信号も同時
に受信を行うようにしていた。Conventionally, when a car line is used in this type of multiple access meeting line, a circuit that always allows voice signals to be received on the receiving side simultaneously receives voice signals from the own station.

〔解決すべき問題点〕[Problems to be solved]

このような従来のマルチブルアクセス打合せ回路におい
ては、受信側にて常時音声信号を受信可とし、且つ自局
発音声信号をも同時に受信するこ・ととしていたため、
エコー・バックが発生するという問題点があった、この
問題点を解決するための一方法としては、例えば音声信
号を送出中は受信を禁止する方法が考えられるが、これ
では、衛星回＃々どの伝送ｉ！延の大きい回線の場合、
上記禁止する時間が天真〈なり音声が不自然となるとい
う問題点があつ九、 ｃ問題点の解決手段〕 本発明は、上記問題点を解決し、エコー・バックがなく
、かつ、不自然な音声のとぎれを無くざんとする本ので
あって、その解決手段として、送信側において、送信音
声信号に符号発生回路からの自局アドレス信号（対応す
る自局符号を付加し、送信音声バーストに変換するため
の符号付加回路と、受信側では、受信音声バースト信号
符号発生回路からの自局アドレスに対応する自局符号と
を比較し、不一致の場合のみ受信音声信号を再生する符
号比較回路とからなるマルチブルアクセス打合せ回路を
提ｔ＃ぜんとするものである。In such conventional multiple access meeting circuits, the receiving side was always able to receive audio signals and also simultaneously received audio signals from its own station.
One way to solve this problem is to prohibit the reception of audio signals while transmitting them, but this would prevent the satellite from receiving the signals every time. Which transmission i! In the case of a line with a large spread,
There is a problem that the above-mentioned prohibited time becomes unnatural and the sound becomes unnatural.Means for solving problem c) The present invention solves the above problems, eliminates echo back, and produces an unnatural sound. This book aims to eliminate interruptions in audio, and as a solution, the transmitting side adds a local address signal (corresponding local code) from a code generation circuit to the transmitted audio signal and converts it into a transmitted audio burst. and a code comparison circuit on the receiving side that compares the own station code corresponding to the own station address from the received voice burst signal code generation circuit and reproduces the received voice signal only if there is a mismatch. A multiple access meeting circuit is proposed.

〔実施例〕〔Example〕

次に本発明の一実施例について第１図を＃照しと、自局
符号３と、符号付加回路４と、送信音声信号バースト５
と、受信音声信号バースト６と、符号比較回路７と、受
信音声信号８とからなる。Next, regarding one embodiment of the present invention, referring to FIG.
, a received audio signal burst 6 , a code comparison circuit 7 , and a received audio signal 8 .

本発明のマルチアクセス打合せ回路の動作を説明すると
、送信音声信号１を符号付加回路４にで符号発生回路２
からの自局符号３と合成し、送信音声信号バースト５と
して送出する。一方、受信した受信音声信号バースト６
は符号発生回路２からの自局符号３と符号比較回路７に
て比較し、一致しない場合のみ再生した受信音声信号８
ｔ−出力する。To explain the operation of the multi-access meeting circuit of the present invention, the transmission audio signal 1 is sent to the code addition circuit 4 and the code generation circuit 2
It is combined with the local station code 3 from , and sent out as a transmission audio signal burst 5 . On the other hand, the received voice signal burst 6
is the received audio signal 8 which is compared with the local code 3 from the code generation circuit 2 by the code comparison circuit 7 and reproduced only if they do not match.
t-output.

従って、従来のようにエコー・バックが発生することが
なく、それでいて音声が不自然となるというようなこと
がなく、極めて良好である。Therefore, unlike the conventional system, echo back does not occur, and the sound does not become unnatural, which is very good.

〔発明の効果〕〔Effect of the invention〕

以上説明したように、本発明は、送信音声信号に符号発
生回路からの自局符号を付加し送信音声バースト信号に
変換する符号付加回路と、受信音声バースト信号と前記
自局符号との不一致の場合のみ受信音声信号を再生する
符号比較回路とからなる構成としたため、受信側の符号
−数構出判断ノミによりマルチブルアクセス回路のエコ
ー・バックを完全に防止でキ、シか４音声が不自然とな
ることなく、打合せ回線を使用する通話者にとって自然
々感じの通話を提供することができるという効果を有す
る。As described above, the present invention provides a code addition circuit that adds a local code from a code generation circuit to a transmitted audio signal and converts it into a transmitted audio burst signal, and a code addition circuit that adds a local code from a code generation circuit to a transmitted audio signal and converts it into a transmitted audio burst signal. Since the configuration consists of a code comparison circuit that reproduces the received audio signal only when the received audio signal is received, echo back of the multiple access circuit can be completely prevented by determining the code-number structure on the receiving side. This has the effect of providing a conversation that feels natural to the caller using the meeting line without sounding natural.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は、本発明の一実施例を示す回路図である。 ｌ・・・送信音声信号　　　２・・・符号発生回路３・
・・自局符号　　　　　４・・・符号付加回路５・・・
送信音声信号バースト ６・・・受信音声信号バーストFIG. 1 is a circuit diagram showing one embodiment of the present invention. l... Transmission audio signal 2... Code generation circuit 3.
... Own station code 4 ... Code addition circuit 5 ...
Transmission audio signal burst 6...Reception audio signal burst

Claims (1)

【特許請求の範囲】[Claims] 送信音声信号に符号発生回路からの自局符号を付加し送
信音声バースト信号に変換する符号付加回路と、受信音
声バースト信号と前記自局符号との不一致の場合のみ受
信音声信号を再生する符号比較回路とからなるマルチブ
ルアクセス打合せ回路。A code addition circuit that adds a local code from a code generation circuit to a transmitted audio signal and converts it into a transmitted audio burst signal, and a code comparison circuit that reproduces the received audio signal only when there is a mismatch between the received audio burst signal and the local code. A multi-access meeting circuit consisting of a circuit.
JP21915484A 1984-10-18 1984-10-18 Multiple access order circuit Pending JPS6198027A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21915484A JPS6198027A (en) 1984-10-18 1984-10-18 Multiple access order circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21915484A JPS6198027A (en) 1984-10-18 1984-10-18 Multiple access order circuit

Publications (1)

Publication Number Publication Date
JPS6198027A true JPS6198027A (en) 1986-05-16

Family

ID=16731045

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21915484A Pending JPS6198027A (en) 1984-10-18 1984-10-18 Multiple access order circuit

Country Status (1)

Country Link
JP (1) JPS6198027A (en)

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