JPH0451616A - Digital transmission system and repeater - Google Patents
Digital transmission system and repeaterInfo
- Publication number
- JPH0451616A JPH0451616A JP15880590A JP15880590A JPH0451616A JP H0451616 A JPH0451616 A JP H0451616A JP 15880590 A JP15880590 A JP 15880590A JP 15880590 A JP15880590 A JP 15880590A JP H0451616 A JPH0451616 A JP H0451616A
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- overhead
- main signal
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 71
- 238000003780 insertion Methods 0.000 claims abstract description 22
- 230000037431 insertion Effects 0.000 claims abstract description 22
- 238000000926 separation method Methods 0.000 claims description 23
- 230000005236 sound signal Effects 0.000 claims description 20
- 238000004891 communication Methods 0.000 abstract description 7
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はオーバーヘッドピットを用いて局舎間の打ち合
わせを行ことが可能なデジタル伝送システム及びそれに
使用される中継装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a digital transmission system that can conduct meetings between stations using an overhead pit, and a relay device used therein.
従来、この種のデジタル伝送システムは、第２図に示す
ような構成を有する。デジタル伝送システムは、端局装
置１０−Ｗと、端局装置１０−Ｅと、それらの間に設け
られる少なくとも１つの中線装置２０′とを有する。Conventionally, this type of digital transmission system has a configuration as shown in FIG. The digital transmission system includes a terminal device 10-W, a terminal device 10-E, and at least one central line device 20' provided between them.
端局装置１０−Ｗは、入力音声信号４Ｗ−５Ａを送信デ
ジタル信号４Ｗ−５Ｄに変換する符号化部１１−Ｗと、
送信デジタル信号４Ｗ−３Ｄを送信主信号ＤＡＴＡ−３
に乗せるオーバーヘッド挿入部１２−Ｗと、受信主信号
ＤＡＴＡ−Ｒから受信オーバーヘッド信号４Ｗ−ＲＤを
取り出すオーバーヘッド分離部１３−Ｗと、受信オーバ
ーヘッド信号４Ｗ−ＲＤを出力音声信号４Ｗ−ＲＡに変
換する復号化部１４−Ｗとを有する。同様に、端局装置
１０−Ｅは、符号化部１１−Ｅと、オーバーヘッド挿入
部１２−Ｅと、オーバーヘッド分離部１３−Ｅと、復号
化部１４−Ｅとを有する。The terminal device 10-W includes an encoding unit 11-W that converts the input audio signal 4W-5A into a transmission digital signal 4W-5D,
Transmit digital signal 4W-3D to transmit main signal DATA-3
an overhead insertion unit 12-W for adding the received overhead signal 4W-RD to the received main signal DATA-R, an overhead separation unit 13-W for extracting the received overhead signal 4W-RD from the received main signal DATA-R, and a decoding unit for converting the received overhead signal 4W-RD into an output audio signal 4W-RA. It has a converting section 14-W. Similarly, the terminal device 10-E includes an encoding section 11-E, an overhead insertion section 12-E, an overhead separation section 13-E, and a decoding section 14-E.
中継装置２０′は、端局装置１０−Ｗ側にあるオーバー
ヘッド挿入部２２−Ｗ及びオーバーヘッド分離部２２−
Ｗと、端局装置１０−Ｅ側にあるオーバーヘッド挿入部
２２−Ｅ及びオーバーヘッド分離部２２−Ｅと、符号化
部２１と復号化部２４とを有する。The relay device 20' includes an overhead insertion section 22-W and an overhead separation section 22-W on the terminal device 10-W side.
W, an overhead insertion section 22-E and an overhead separation section 22-E on the terminal device 10-E side, an encoding section 21, and a decoding section 24.
更に、中継装置２０′は、第１乃至第３のセレクタ２６
’、２７’及び２８′を有する。第１のセレクタ２６′
は、オーバーヘッド分離部２３−Ｗで分離されたオーバ
ーヘッド信号４Ｗ−ＲＤ（Ｗ−Ｅ）と自局（符号化部２
１）で生成したオーバーヘッド信号４Ｗ−８Ｄの何れか
を選択し、選択されたオーバーヘッド信号４Ｗ−８Ｄ
（Ｗ−Ｅ）をオーバーヘッド挿入部２２−Ｅに送出する
。Further, the relay device 20' has first to third selectors 26
', 27' and 28'. First selector 26'
is the overhead signal 4W-RD (W-E) separated by the overhead separation unit 23-W and the own station (encoding unit 2
Select one of the overhead signals 4W-8D generated in 1), and select the selected overhead signal 4W-8D.
(W-E) is sent to the overhead insertion section 22-E.
第２のセレクタ２７′は、オーバーヘッド分離部２３−
Ｅで分離されたオーバーヘッド信号４Ｗ−ＲＤ （Ｅ−
Ｗ）と自局で生成したオーバーヘッド信号４Ｗ−８Ｄの
何れかを選択し、選択されたオーバーヘッド信号４Ｗ−
５Ｄ （Ｅ−Ｗ）をオーバーヘッド挿入部２２−Ｗに送
出する。第３のセレクタ２８′は、オーバーヘッド分離
部２３−Ｗで分離されたオーバーヘッド信号４Ｗ−ＲＤ
（Ｗ−Ｅ）とオーバーヘッド分離部２３−Ｅで分離さ
れたオーバーヘッド信号４Ｗ−ＲＤ （Ｅ−Ｗ）との何
れかを選択し、選択されたオーバーヘッド信号４Ｗ−Ｒ
Ｄを復号化部２４に送出する。第２図に於いて、太線の
矢印は主信号の流れを示す０次に従来のデジタル伝送シ
ステムの動作について、第２図及び第３図を参照して説
明する。The second selector 27' is connected to the overhead separating section 23-
Overhead signal 4W-RD (E-
W) and the overhead signal 4W-8D generated by the local station, and select the selected overhead signal 4W-8D.
5D (E-W) to the overhead insertion section 22-W. The third selector 28' receives the overhead signal 4W-RD separated by the overhead separation section 23-W.
(W-E) and the overhead signal 4W-RD (E-W) separated by the overhead separation section 23-E, and select the selected overhead signal 4W-R.
D is sent to the decoding section 24. In FIG. 2, bold arrows indicate the flow of main signals. The operation of the zero-order conventional digital transmission system will be described with reference to FIGS. 2 and 3.
１）端局装置１０−Ｗと端局装置１０−Ｅとの間の通話
の（オーバーヘッド信号をスルーとする）場合。1) A case of communication between the terminal device 10-W and the terminal device 10-E (overhead signal is passed through).
第１及び第２のセレクタ２６′及び２７′をＴ側に接続
する。これにより、オーバーヘッド分離部２２−Ｗ及び
２２−Ｅが主信号から取り出したオーバーヘッド信号４
Ｗ−ＲＤ （Ｗ−Ｅ）及び４Ｗ−ＲＤ （Ｅ−Ｗ）をオ
ーバーヘッド挿入部２２−Ｅ及び２２−Ｗを通して再び
主信号に乗せる。The first and second selectors 26' and 27' are connected to the T side. As a result, the overhead separation units 22-W and 22-E extract the overhead signal 4 from the main signal.
W-RD (W-E) and 4W-RD (E-W) are placed on the main signal again through the overhead insertion sections 22-E and 22-W.
２）中継装置２０′がＥ側の局（中継装置又は端局装置
１Ｏ−Ｅ）と通話する場合。2) When the relay device 20' communicates with a station on the E side (relay device or terminal device 1O-E).
第１のセレクタ２６′を１側に、第３のセレクタ２８′
をＥ側に接続する。これにより、自局の音声信号４Ｗ−
８ＡをＥ側に向けて送る。The first selector 26' is on the 1 side, the third selector 28'
Connect to the E side. As a result, the own station's audio signal 4W-
Send 8A toward the E side.
２）中継装置２０′がＷ側の局（中継装置又は端局装置
１Ｏ−Ｗ）と通話する場合。2) When the relay device 20' communicates with a station on the W side (relay device or terminal device 1O-W).
第２のセレクタ２７′をＴ側に、第３のセレクタ２８′
をＷ側に接続する。これにより、自局の音声信号４Ｗ−
８ＡをＷ側に向けて送る。The second selector 27' is on the T side, and the third selector 28'
Connect to the W side. As a result, the own station's audio signal 4W-
Send 8A towards the W side.
上述した従来の中継装置２０’は、中継局側で通話を行
う場合に上流からのオーバーヘッド信号の代わりに自局
で生成したオーバーヘッド信号を挿入しているので、セ
レクタの制御が必要となる欠点がある。また、中継局が
通話中の時は端局同士の通話が行えなくなるので、端局
間の通話を常に確保するためには別のオーバーヘッド信
号を必要とするという欠点がある。The above-mentioned conventional relay device 20' has the disadvantage that selector control is required since the relay station inserts an overhead signal generated at the relay station instead of an overhead signal from upstream when making a call. be. Furthermore, when the relay station is busy, the terminal stations cannot communicate with each other, so another overhead signal is required to always ensure communication between the terminal stations.
本発明によるデジタル伝送システムは、第１の端局装置
と、第２の端局装置と、前記第１及び第２の端局装置間
に設けられた少なくとも１つ中継装置とを有し、前記第
１の端局装置はｗ４１の端局入力主信号を受けてＩＩの
端局送信主信号を前記中継装置へ送出し、前記中継装置
は前記第１の端局送信主信号を第１の中継受信主信号と
して受けて第１の中継送信主信号を前記第２の端局装置
へ送出し、前記第２の端局装置は前記第１の中継送借主
信号を第２の端局受信主信号として受けて第２の端局出
力主信号を出力し、前記第２の端局装置は第２の端局入
力主信号を受けて第２の端局送信主信号を前記中継装置
へ送出し、前記中継装置は前記第２の端局送信主信号を
第２の中継受信主信号として受けて第２の中継送信主信
号を前記第１の端局装置へ送出し、前記第１の端局装置
は前記第２の中継送信主信号を第１の端局受信主信号と
して受けて第１の端局出力主信号を出力するデジタル伝
送システムであって、
前記第１の端局装置は、第１の端局入力音声信号を第１
の端局送信デジタル信号に変換する第１の端局符号化部
と、前記第１の端局送信デジタル信号を前言己第１の端
局入力主信号に挿入して前記第１の端局送信主信号を得
る第１の端局オーバーヘッド挿入部と、前記第１の端局
受信主信号を第１の端局受信オーバーヘッド信号と前記
第１の端局出力主信号とに分離する第１の端局オーバー
ヘッド分離部と、前記第１の端局受信オーバーヘッド信
号を第１の端局出力音声信号に変換する第１の端局復号
化部とを有し、
前記第２の端局装置は、第２の端局入力音声信号を第２
の端局送信デジタル信号に変換する第２の端局符号化部
と、前記第２の端局送信デジタル信号を前記第２の端局
入力主信号に挿入して前記第２の端局送信主信号を得る
第２の端局オーバーヘッド挿入部と、前記第２の端局受
信主信号を第２の端局受信オーバーヘッド信号と前記第
２の端局出力主信号とに分離する第２の端局オーバーヘ
ッド分離部と、前記第２の端局受信オーバーヘッド信号
を第２の端局出力音声信号に変換する第２の端局復号化
部とを有し、
前記中継装置の各々は、前記第１の中継受信主信号を第
１の中継オーバーヘッド信号と第１の中間受信主信号と
に分離する第１の中継オーバーヘッド分離部と、前記第
２の中継受信主信号を第２の中継オーバーヘッド信号と
第２の中間受信主信号とに分離する第２の中継オーバー
ヘッド分離部と、中継入力音声信号を中継送信デジタル
信号に変換する中継符号化部と、前記第１の中継オーバ
ーヘッド信号と前記中継送信デジタル信号とを加算して
第１の加算されたデジタル信号をａカする第１の加算手
段と、前記第２の中継オーバーヘッド信号と前記中継送
信デジタル信号とを加算してＩｎ２の加算されたデジタ
ル信号を出力する第２の加算手段と、前記第１の中間受
信主信号に前記第１の加算されたデジタル信号を挿入し
て前記第１の中継送信主信号を得る第１の中継オーバー
ヘッド挿入部と、前記第２の中間受信主信号に前記第２
の加算されたデジタル信号を挿入して前記第２の中継送
信主信号を得る第２の中継オーバーヘッド挿入部と、前
記第１の中継オーバーヘッド信号と前記第２の中継オー
バーヘッド信号とを加算してＮ４３の加算されたデジタ
ル信号を出力する第３の加算手段と、前記第３の加算さ
れたデジタル信号を中継出力音声信号に変換する中継復
号化部とを有することを特徴とする。The digital transmission system according to the present invention includes a first terminal device, a second terminal device, and at least one relay device provided between the first and second terminal devices, The first terminal device receives the terminal station input main signal w41 and sends the terminal station transmission main signal II to the relay device, and the relay device transmits the first terminal station transmission main signal to the first relay device. The first relay transmission main signal received as a reception main signal is sent to the second terminal device, and the second terminal device converts the first relay transmission tenant signal into a second terminal reception main signal. the second terminal station receives the second terminal station input main signal and outputs a second terminal station output main signal, and the second terminal station device receives the second terminal station input main signal and sends a second terminal station transmission main signal to the relay device, The relay device receives the second terminal station transmission main signal as a second relay reception main signal, sends the second relay transmission main signal to the first terminal device, and transmits the second relay transmission main signal to the first terminal device. is a digital transmission system that receives the second relay transmission main signal as a first terminal station reception main signal and outputs a first terminal station output main signal, wherein the first terminal station device The terminal station input audio signal is
a first terminal station encoding unit that converts the first terminal station transmission digital signal into a terminal station transmission digital signal; and inserting the first terminal station transmission digital signal into the first terminal station input main signal to transmit the first terminal station transmission. a first terminal station overhead insertion section for obtaining a main signal; and a first end for separating the first terminal station reception main signal into a first terminal station reception overhead signal and the first terminal station output main signal. a station overhead separation section; and a first terminal station decoding section that converts the first terminal station received overhead signal into a first terminal station output audio signal; 2 terminal station input audio signal to the 2nd terminal station.
a second terminal station encoding unit that converts the second terminal station transmission digital signal into a terminal station transmission digital signal, and inserts the second terminal station transmission digital signal into the second terminal station input main signal to transmit the second terminal station transmission main signal. a second terminal station overhead inserter for obtaining a signal; and a second terminal station for separating the second terminal station reception main signal into a second terminal station reception overhead signal and the second terminal station output main signal. and a second terminal station decoding section that converts the second terminal station reception overhead signal into a second terminal station output audio signal, and each of the relay devices has the first terminal station output audio signal. a first relay overhead separation unit that separates the relay reception main signal into a first relay overhead signal and a first intermediate reception main signal; a second relay overhead separation section that separates the intermediate reception main signal into the first relay overhead signal and the relay transmission digital signal; a relay encoding section that converts the relay input audio signal into the relay transmission digital signal; and the first relay overhead signal and the relay transmission digital signal. a first adding means for adding the first added digital signal by adding the first added digital signal; and adding the second relay overhead signal and the relay transmission digital signal to output the added digital signal of In2. a first relay overhead insertion unit for inserting the first added digital signal into the first intermediate reception main signal to obtain the first relay transmission main signal; the second intermediate reception main signal;
a second relay overhead insertion section that inserts the added digital signal to obtain the second relay transmission main signal; and a second relay overhead insertion section that adds the first relay overhead signal and the second relay transmission main signal, and a relay decoding section that converts the third added digital signal into a relay output audio signal.
次に、本発明の実施例について図面を参照して説明する
。Next, embodiments of the present invention will be described with reference to the drawings.
第１図を参照すると、本発明の一実施例によるデジタル
伝送システムは、中継装置２０が従来の中継装置２０′
と相違している点を除いて第２図に示されたものと同様
の構成を有する。Referring to FIG. 1, in a digital transmission system according to an embodiment of the present invention, a relay device 20 is replaced with a conventional relay device 20'.
The configuration is similar to that shown in FIG. 2 except for the differences.
本実施例の中継装置２０は、第１乃至第３のセレクタ２
６′〜２８′の代わりに第１乃至第３のデジタルシグナ
ルプロセッサ２６．２７及び２８を有している点を除い
て従来の中継装置２０′と同様の構成を有する。The relay device 20 of this embodiment has first to third selectors 2
It has the same configuration as the conventional relay device 20' except that first to third digital signal processors 26, 27 and 28 are provided instead of 6' to 28'.
第１のデジタルシグナルプロセッサ２６は、オーバーヘ
ッド分離部２３−Ｗで分離されたオーバーヘッド信号４
Ｗ−ＲＤ （Ｗ−Ｅ）と自局（符号化部２１）で生成し
たオーバーヘッド信号４Ｗ−ＳＤとの和をとり、和をと
ったオーバーヘッド信号４Ｗ−３Ｄ （Ｗ−Ｅ）をオー
バーヘッド挿入部２２−Ｅに送出する。第２のデジタル
シグナルプロセッサ２７は、オーバーヘッド分離部２３
−Ｅで分離されたオーバーヘッド信号４Ｗ−ＲＤ （Ｅ
−Ｗ）と自局で生成したオーバーヘッド信号４ＷＳＤと
の和をとり、和をとったオーバーヘッド信号４Ｗ−８Ｄ
（Ｅ−Ｗ）をオーバーヘッド挿入部２２−Ｗに送出す
る。第３のデジタルシグナルプロセッサ２８は、オーバ
ーヘッド分離部２３Ｗで分離されたオーバーヘッド信号
４Ｗ−ＲＤ（Ｗ−Ｅ）とオーバーヘッド分離部２３−Ｅ
で分離されたオーバーヘッド信号４Ｗ−ＲＤ （Ｅ−Ｗ
）との和をとり、和をとったオーバーヘッド信号４Ｗ−
ＲＤを復号化部２４に送出する。The first digital signal processor 26 receives the overhead signal 4 separated by the overhead separation unit 23-W.
The sum of W-RD (W-E) and the overhead signal 4W-SD generated by the local station (encoding unit 21) is calculated, and the summed overhead signal 4W-3D (W-E) is sent to the overhead insertion unit 22. - Send to E. The second digital signal processor 27 includes an overhead separation unit 23
-E separated overhead signal 4W-RD (E
-W) and the overhead signal 4WSD generated by the own station, and the summed overhead signal 4W-8D
(E-W) is sent to the overhead insertion section 22-W. The third digital signal processor 28 receives the overhead signal 4W-RD (W-E) separated by the overhead separation section 23W and the overhead signal 4W-RD (W-E) separated by the overhead separation section 23-E.
Overhead signal 4W-RD (E-W
), and the summed overhead signal 4W-
The RD is sent to the decoding section 24.
次に、本実施例の動作について説明する。Next, the operation of this embodiment will be explained.
端局装置１０−Ｗから送られてきた主信号ＤＡＴＡ−Ｒ
（Ｗ−Ｅ）に含まれるオーバーヘッド信号４Ｗ−ＲＤ
（Ｗ−Ｅ）は中継装置２０のオーバーヘッド分離部２３
−Ｗで一旦分離される。オーバーヘッド信号４Ｗ−ＲＤ
（Ｗ−Ｅ）は第１のデジタルシグナルプロセッサ２６
を通ってオーバーヘッド挿入部２２−Ｅで主信号ＤＡＴ
Ａ−５（Ｗ−Ｅ）に戻される。同様に、端局装置１０−
Ｅから送られてきた主信号ＤＡＴＡ−Ｒ（Ｅ−Ｗ）に含
まれるオーバーヘッド信号４Ｗ−ＲＤ （Ｅ−Ｗ）は中
継装置２０のオーバーヘッド分離部２３−Ｅで一旦分離
される。オーバーヘッド信号４Ｗ−ＲＤ （Ｅ−Ｗ）は
第２のデジタルシグナルプロセッサ２７を通ってオーバ
ーヘッド挿入部２２−Ｗで主信号ＤＡＴＡ−Ｓ （Ｅ−
Ｗ）に戻される。このため、端局同士の通話が常時可能
となる。Main signal DATA-R sent from terminal device 10-W
Overhead signal 4W-RD included in (W-E)
(W-E) is the overhead separation unit 23 of the relay device 20
-W is temporarily separated. Overhead signal 4W-RD
(W-E) is the first digital signal processor 26
The main signal DAT is passed through the overhead insertion section 22-E.
Returned to A-5 (W-E). Similarly, the terminal device 10-
The overhead signal 4W-RD (E-W) included in the main signal DATA-R (E-W) sent from the relay device 20 is once separated by the overhead separation section 23-E of the relay device 20. The overhead signal 4W-RD (E-W) passes through the second digital signal processor 27 and is output as the main signal DATA-S (E-
W). Therefore, communication between terminal stations is always possible.
この時、分離されたオーバーヘッド信号４Ｗ−ＲＤ （
Ｗ−Ｅ）及び４Ｗ−ＲＤ （Ｅ−Ｗ）は第３のデジタル
シグナルプロセッサ２８で加算され、この加算されたオ
ーバーヘッド信号４Ｗ−ＲＤが復号化部２４で復号化さ
れる。従って、中継装置２０においてＥ側／Ｗ側両方向
のモニタが可能となる。At this time, the separated overhead signal 4W-RD (
W-E) and 4W-RD (E-W) are added by the third digital signal processor 28, and the added overhead signal 4W-RD is decoded by the decoder 24. Therefore, the relay device 20 can monitor both the E side and the W side.
次に、中継装置２０から送話する場合について説明する
。符号化部２１で符号化した送話信号４Ｗ−８Ｄと受信
したオーバーヘッド信号４Ｗ−ＲＤ（Ｗ−Ｅ）及び４Ｗ
−ＲＤ （Ｅ−Ｗ）とをそれぞれ第１乃至第２のデジタ
ルシグナルプロセッサ２６及び２７によって加算する。Next, a case where a call is transmitted from the relay device 20 will be explained. Transmission signal 4W-8D encoded by the encoding unit 21 and received overhead signals 4W-RD (W-E) and 4W
-RD (E-W) are added by the first and second digital signal processors 26 and 27, respectively.
この加算されたオーバーヘッド信号４Ｗ−ＳＤ （Ｗ−
Ｅ）及び４Ｗ−５Ｄ （Ｅ−Ｗ）は、それぞれ、オーバ
ーヘッド挿入部２２−Ｅ及び２２−Ｗにおいて主信号Ｄ
ＡＴＡ−５（Ｗ−Ｅ）及びＤＡＴＡ−Ｓ （Ｅ−Ｗ）に
乗せている。このように、符号化部２１で符号化した送
話信号４Ｗ−３ＤはＷ−Ｅ／Ｅ−Ｗ両方向に対して送信
するため、常時両方向に対して送話が可能となる。This added overhead signal 4W-SD (W-
E) and 4W-5D (E-W) are the main signal D in the overhead insertion sections 22-E and 22-W, respectively.
It is carried on ATA-5 (W-E) and DATA-S (E-W). In this way, since the transmission signal 4W-3D encoded by the encoding unit 21 is transmitted in both the W-E and E-W directions, it is possible to transmit speech in both directions at all times.
以上説明したように、本発明の中継装置は、第１の端局
装置より受信したオーバーヘッド信号と自局より送話す
る信号との加算処理を行って加算された信号を第２の端
局装置へ送信し、第２の端局装置より受信したオーバー
ヘッド信号と自局より送話する信号との加算処理を行っ
て加算された信号を第１の端局装置へ送信し、第１の端
局装置より受信したオーバーヘッド信号と第２の端局装
置より受信したオーバーヘッド信号との加算結果をモニ
タすることにより、セレクタの切り替え等の制御を一切
行わずに、任意の端局装置と中継装置間で通話を行うこ
とが可能となる。更に、同一伝送路を使用する全ての端
局装置及び中継装置が同時に相互通話を行うことも可能
である。As explained above, the relay device of the present invention performs an addition process on the overhead signal received from the first terminal device and the signal transmitted from the local station, and sends the added signal to the second terminal device. The overhead signal received from the second terminal device is added to the signal transmitted from the own station, and the added signal is transmitted to the first terminal device. By monitoring the addition result of the overhead signal received from the device and the overhead signal received from the second terminal device, communication between any terminal device and the relay device can be performed without any control such as switching the selector. It becomes possible to make a call. Furthermore, it is also possible for all terminal devices and relay devices using the same transmission path to communicate with each other at the same time.
第１図は本発明の一実施例によるデジタル伝送システム
を示すブロック図、第２図は従来のデジタル伝送システ
ムを示すブロック図、第３図は第２図のデジタル伝送シ
ステムの動作を説明するための図である。
１０−Ｗ、１０−Ｅ・・・端局装置、１１−Ｗ、１１−
Ｅ・・・符号化部、１２−Ｗ、１２−Ｅ・・・オーバー
ヘッド挿入部、１３−Ｗ、１３−Ｅ・・・オーバーヘッ
ド分離部、１４−Ｗ、１４−Ｅ・・・復号化部、２０・
・・中継装置、２１・・・符号化部、２２−Ｗ、２２−
Ｅ・・・オーバーヘッド挿入部、２３−Ｗ、２３−Ｅ・
・・オーバーヘッド分離部、２４・・・復号化部、２６
．２７．２８・・・デジタルシグナルプロセッサ。FIG. 1 is a block diagram showing a digital transmission system according to an embodiment of the present invention, FIG. 2 is a block diagram showing a conventional digital transmission system, and FIG. 3 is for explaining the operation of the digital transmission system shown in FIG. This is a diagram. 10-W, 10-E...terminal device, 11-W, 11-
E... encoding unit, 12-W, 12-E... overhead insertion unit, 13-W, 13-E... overhead separation unit, 14-W, 14-E... decoding unit, 20・
...Relay device, 21... Encoding section, 22-W, 22-
E... Overhead insertion section, 23-W, 23-E.
...Overhead separation section, 24...Decoding section, 26
．． 27.28...Digital signal processor.
Claims (1)
び第２の端局装置間に設けられた少なくとも１つ中継装
置とを有し、前記第１の端局装置は第１の端局入力主信
号を受けて第１の端局送信主信号を前記中継装置へ送出
し、前記中継装置は前記第１の端局送信主信号を第１の
中継受信主信号として受けて第１の中継送信主信号を前
記第２の端局装置へ送出し、前記第２の端局装置は前記
第１の中継送信主信号を第２の端局受信主信号として受
けて第２の端局出力主信号を出力し、前記第２の端局装
置は第２の端局入力主信号を受けて第２の端局送信主信
号を前記中継装置へ送出し、前記中継装置は前記第２の
端局送信主信号を第２の中継受信主信号として受けて第
２の中継送信主信号を前記第１の端局装置へ送出し、前
記第１の端局装置は前記第２の中継送信主信号を第１の
端局受信主信号として受けて第１の端局出力主信号を出
力するデジタル伝送システムに於いて、前記第１の端局
装置は、第１の端局入力音声信号を第１の端局送信デジ
タル信号に変換する第１の端局符号化部と、前記第１の
端局送信デジタル信号を前記第１の端局入力主信号に挿
入して前記第１の端局送信主信号を得る第１の端局オー
バーヘッド挿入部と、前記第１の端局受信主信号を第１
の端局受信オーバーヘッド信号と前記第１の端局出力主
信号とに分離する第１の端局オーバーヘッド分離部と、
前記第１の端局受信オーバーヘッド信号を第１の端局出
力音声信号に変換する第１の端局復号化部とを有し、 前記第２の端局装置は、第２の端局入力音声信号を第２
の端局送信デジタル信号に変換する第２の端局符号化部
と、前記第２の端局送信デジタル信号を前記第２の端局
入力主信号に挿入して前記第２の端局送信主信号を得る
第２の端局オーバーヘッド挿入部と、前記第２の端局受
信主信号を第２の端局受信オーバーヘッド信号と前記第
２の端局出力主信号とに分離する第２の端局オーバーヘ
ッド分離部と、前記第２の端局受信オーバーヘッド信号
を第２の端局出力音声信号に変換する第２の端局復号化
部とを有し、 前記中継装置の各々は、前記第１の中継受信主信号を第
１の中継オーバーヘッド信号と第１の中間受信主信号と
に分離する第１の中継オーバーヘッド分離部と、前記第
２の中継受信主信号を第２の中継オーバーヘッド信号と
第２の中間受信主信号とに分離する第２の中継オーバー
ヘッド分離部と、中継入力音声信号を中継送信デジタル
信号に変換する中継符号化部と、前記第１の中継オーバ
ーヘッド信号と前記中継送信デジタル信号とを加算して
第１の加算されたデジタル信号を出力する第１の加算手
段と、前記第２の中継オーバーヘッド信号と前記中継送
信デジタル信号とを加算して第２の加算されたデジタル
信号を出力する第２の加算手段と、前記第１の中間受信
主信号に前記第１の加算されたデジタル信号を挿入して
前記第１の中継送信主信号を得る第１の中継オーバーヘ
ッド挿入部と、前記第２の中間受信主信号に前記第２の
加算されたデジタル信号を挿入して前記第２の中継送信
主信号を得る第２の中継オーバーヘッド挿入部と、前記
第１の中継オーバーヘッド信号と前記第２の中継オーバ
ーヘッド信号とを加算して第３の加算されたデジタル信
号を出力する第３の加算手段と、前記第３の加算された
デジタル信号を中継出力音声信号に変換する中継復号化
部とを有する ことを特徴とするデジタル伝送システム。 ２、デジタル伝送システムの第１及び第２の端局装置間
に設けられ、前記第１の端局装置側から送出されてくる
第１の端局送信主信号を第１の中継受信主信号として受
けて第１の中継送信主信号を前記第２の端局装置へ送出
し、前記第２の端局装置側から送出されてくる第２の端
局受信主信号第２の中継受信主信号として受けて第２の
中継送信主信号を前記第１の端局装置へ送出する中継装
置に於いて、 前記第１の中継受信主信号を第１の中継オーバーヘッド
信号と第１の中間受信主信号とに分離する第１のオーバ
ーヘッド分離部と、前記第２の中継受信主信号を第２の
中継オーバーヘッド信号と第２の中間受信主信号とに分
離する第２のオーバーヘッド分離部と、中継入力音声信
号を中継送信デジタル信号に変換する符号化部と、前記
第１の中継オーバーヘッド信号と前記中継送信デジタル
信号とを加算して第１の加算されたデジタル信号を出力
する第１の加算手段と、前記第２の中継オーバーヘッド
信号と前記中継送信デジタル信号とを加算して第２の加
算されたデジタル信号を出力する第２の加算手段と、前
記第１の中間受信主信号に前記第１の加算されたデジタ
ル信号を挿入して前記第１の中継送信主信号を得る第１
のオーバーヘッド挿入部と、前記第２の中間受信主信号
に前記第２の加算されたデジタル信号を挿入して前記第
２の中継送信主信号を得る第２のオーバーヘッド挿入部
と、前記第１の中継オーバーヘッド信号と前記第２の中
継オーバーヘッド信号とを加算して第３の加算されたデ
ジタル信号を出力する第３の加算手段と、前記第３の加
算されたデジタル信号を中継出力音声信号に変換する復
号化部とを有する ことを特徴とする中継装置。 ３、前記第１乃至第３の加算手段の各々がデジタルシグ
ナルプロセッサである請求項２記載の中継装置。[Claims] 1. A first terminal device, a second terminal device, and at least one relay device provided between the first and second terminal device, the The first terminal device receives the first terminal input main signal and sends the first terminal station transmission main signal to the relay device, and the relay device transmits the first terminal station transmission main signal to the first terminal station input main signal. , and sends the first relay transmission main signal to the second terminal device, and the second terminal device receives the first relay transmission main signal as a relay reception main signal. The second terminal station device receives the second terminal station input main signal and outputs a second terminal station output main signal as a main signal, and the second terminal station device receives the second terminal station input main signal and sends out a second terminal station transmission main signal to the relay device. The relay device receives the second terminal station transmission main signal as a second relay reception main signal, sends the second relay transmission main signal to the first terminal device, and transmits the second relay transmission main signal to the first terminal station. In a digital transmission system in which a station device receives the second relay transmission main signal as a first terminal station reception main signal and outputs a first terminal station output main signal, the first terminal station a first terminal station encoding unit that converts a first terminal station input audio signal into a first terminal station transmission digital signal, and converts the first terminal station transmission digital signal into the first terminal station input main signal; a first terminal station overhead insertion section for inserting the first terminal station transmission main signal into the first terminal station receiving main signal;
a first terminal station overhead separation unit that separates the terminal station reception overhead signal and the first terminal station output main signal;
a first terminal station decoding section that converts the first terminal station reception overhead signal into a first terminal station output audio signal, and the second terminal station device converts the second terminal station input audio signal into a first terminal station output audio signal. 2nd signal
a second terminal station encoding unit that converts the second terminal station transmission digital signal into a terminal station transmission digital signal, and inserts the second terminal station transmission digital signal into the second terminal station input main signal to transmit the second terminal station transmission main signal. a second terminal station overhead inserter for obtaining a signal; and a second terminal station for separating the second terminal station reception main signal into a second terminal station reception overhead signal and the second terminal station output main signal. and a second terminal station decoding section that converts the second terminal station reception overhead signal into a second terminal station output audio signal, and each of the relay devices has the first terminal station output audio signal. a first relay overhead separation unit that separates the relay reception main signal into a first relay overhead signal and a first intermediate reception main signal; a second relay overhead separation section that separates the intermediate reception main signal into the first relay overhead signal and the relay transmission digital signal; a relay encoding section that converts the relay input audio signal into the relay transmission digital signal; and the first relay overhead signal and the relay transmission digital signal. a first adding means for adding the signals and outputting a first added digital signal; and adding the second relay overhead signal and the relay transmission digital signal to output a second added digital signal. a first relay overhead insertion unit for inserting the first added digital signal into the first intermediate reception main signal to obtain the first relay transmission main signal; a second relay overhead insertion unit that inserts the second added digital signal into a second intermediate reception main signal to obtain the second relay transmission main signal; a third addition means for adding the two relay overhead signals and outputting a third added digital signal; and a relay decoding unit for converting the third added digital signal into a relay output audio signal. A digital transmission system characterized by having. 2. A first terminal station transmission main signal provided between a first and second terminal device of a digital transmission system and sent from the first terminal device side as a first relay reception main signal. and transmits the first relay transmission main signal to the second terminal device, and the second terminal reception main signal sent from the second terminal device side as a second relay reception main signal. and a relay device that receives the second relay transmission main signal and sends it to the first terminal device, converts the first relay reception main signal into a first relay overhead signal and a first intermediate reception main signal. a first overhead separation section that separates the second relay reception main signal into a second relay overhead signal and a second intermediate reception main signal; a first adding means for adding the first relay overhead signal and the relay transmission digital signal to output a first added digital signal; a second adding means for adding a second relay overhead signal and the relay transmission digital signal to output a second added digital signal; a first relay transmitting main signal obtained by inserting the digital signal
a second overhead insertion unit for inserting the second added digital signal into the second intermediate reception main signal to obtain the second relay transmission main signal; a third adding means for adding the relay overhead signal and the second relay overhead signal to output a third added digital signal; and converting the third added digital signal into a relay output audio signal. 1. A relay device comprising: a decoding unit. 3. The relay device according to claim 2, wherein each of the first to third adding means is a digital signal processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15880590A JPH0451616A (en) | 1990-06-19 | 1990-06-19 | Digital transmission system and repeater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15880590A JPH0451616A (en) | 1990-06-19 | 1990-06-19 | Digital transmission system and repeater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0451616A true JPH0451616A (en) | 1992-02-20 |
Family
ID=15679743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15880590A Pending JPH0451616A (en) | 1990-06-19 | 1990-06-19 | Digital transmission system and repeater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0451616A (en) |
-
1990
- 1990-06-19 JP JP15880590A patent/JPH0451616A/en active Pending
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