JPS62256555A - Trunk line privacy system - Google Patents
Trunk line privacy systemInfo
- Publication number
- JPS62256555A JPS62256555A JP10005086A JP10005086A JPS62256555A JP S62256555 A JPS62256555 A JP S62256555A JP 10005086 A JP10005086 A JP 10005086A JP 10005086 A JP10005086 A JP 10005086A JP S62256555 A JPS62256555 A JP S62256555A
- Authority
- JP
- Japan
- Prior art keywords
- digital exchange
- trunk line
- voice
- digital
- concealment
- 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
- 230000006835 compression Effects 0.000 claims abstract description 12
- 238000007906 compression Methods 0.000 claims abstract description 12
- 230000001360 synchronised effect Effects 0.000 abstract description 11
- 238000004891 communication Methods 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔概要〕
この発明は、ディジタル交換機と帯域圧縮装置と秘匿装
置とを有し、ディジタル交換機と帯域圧縮装置を接続し
、帯域圧縮後にディジタル交換機を介して秘匿装置で秘
匿処理を行い、高能率の秘匿処理を可能とする。[Detailed Description of the Invention] [Summary] The present invention includes a digital exchange, a bandwidth compression device, and a concealment device, connects the digital exchange and the bandwidth compression device, and after compressing the bandwidth, performs concealment with the concealment device via the digital exchange. processing to enable highly efficient concealment processing.
この発明は、ディジタル・ネットワークの秘匿方式に係
り、特に音声秘匿を高能率で処理する中継線秘匿方式に
関するものである。The present invention relates to a digital network secrecy system, and particularly to a trunk line secrecy system that processes voice secrecy with high efficiency.
ディジタルネットワークでは、−般に電話機は音声をパ
ルス符号変調を行うディジタル交換機と接続されている
。電話機の音声は、ディジタル交換機にて６４Ｋｂ／Ｓ
のディジタルのＯ次群信号となる。In a digital network, a telephone is typically connected to a digital switch that performs pulse code modulation of voice. Telephone audio is transmitted at 64Kb/s using a digital switch.
This is a digital O-order group signal.
このＯ次群信号は、ディジタル交換機にて３０チヤネル
の２Ｍ（２メガ）局内インタフェースに多重化されて、
同期多重端局装置を介してディジタル伝送路に送出され
ている。This O-order group signal is multiplexed into a 30-channel 2M (2 mega) intra-office interface by a digital exchange,
It is sent out to a digital transmission path via a synchronous multiplex terminal equipment.
通話を効率よく行うためにく音声を圧縮するとか、秘密
通話を行いたいということが生じる。In order to make calls more efficient, it may be necessary to compress audio or to make secret calls.
したがって、高能率で上記処理が行える中継線秘匿方式
が必要とされている。Therefore, there is a need for a trunk line concealment system that can perform the above processing with high efficiency.
従来、音声秘匿をする場合に用いられる秘匿装置は、２
点間において符号変換の行われないトランスペアレント
な伝送路で用いられている。したがって、音声をディジ
タル符号に変換して高能率の伝送を行うための音声圧縮
を行う高能率音声符号方式に適用することが不可能であ
った。Conventionally, the concealment devices used for audio concealment are:
It is used in transparent transmission lines where code conversion is not performed between points. Therefore, it has been impossible to apply this method to a high-efficiency speech encoding system that converts speech into digital codes and compresses speech for highly efficient transmission.
前記したように、従来の秘匿装置は高能率音声符号方式
に通用できず、通信効率の向上を阻害するという問題が
あった。As described above, conventional concealment devices cannot be used in high-efficiency speech encoding systems, and there is a problem in that they impede improvement in communication efficiency.
この発明は、以上のような従来の状況から高能率音声符
号方式の適用できる中継線秘匿方式の提供を目的とする
ものである。It is an object of the present invention to provide a trunk line concealment system to which a high-efficiency speech coding system can be applied in view of the conventional situation as described above.
この発明では、第１図に示すように、電話機１と、ディ
ジタル交換機２と、音声帯域圧縮装置３と、中継秘匿装
置４と同期多重端局装置５とで構成されている。As shown in FIG. 1, the present invention is comprised of a telephone 1, a digital exchange 2, a voice band compression device 3, a relay concealment device 4, and a synchronous multiplex terminal device 5.
電話機１の音声は、ディジタル交換機２によってパルス
符号変換され、音声帯域圧縮装置３で圧縮されてディジ
タル交換機２に戻り、チャネル単位で中継線秘匿装置４
にて秘匿が行われ、ディジタル交換機２を介して同期多
重端局装置５に入力される。同期多重端局装置５におい
て不要ビットを除去し、高能率音声伝達を可能とする。The voice of the telephone 1 is pulse code-converted by the digital exchange 2, compressed by the voice band compression device 3, and returned to the digital exchange 2, where it is transmitted to the trunk line concealment device 4 on a channel-by-channel basis.
The data is kept confidential and input to the synchronous multiplex terminal device 5 via the digital exchange 2. Unnecessary bits are removed in the synchronous multiplex terminal device 5 to enable highly efficient voice transmission.
第１図は、本発明の中継線秘匿方式を示すブロック図で
あり、電話機１は、ディジタル交換機（以後ＴＤ Ｓ欝
と記す）２の２−１に接続されている。FIG. 1 is a block diagram showing the trunk line concealment system of the present invention, in which a telephone 1 is connected to 2-1 of a digital exchange (hereinafter referred to as TDS) 2. In FIG.
ＴＯＳＷ ２−１と音声圧縮装置３と接続され、音声圧
縮装置３を介してＴＤ ＳＷ ２−２に接続されている
。It is connected to the TOSW 2-1 and the audio compression device 3, and is connected to the TD SW 2-2 via the audio compression device 3.
ＴＤ ＳＷ ２−２は、中継線秘匿装置４と接続され、
中継線秘匿装置４はＴＩ） ＳＷ ２−３に接続されて
いる。TD SW 2-2 is connected to trunk line concealment device 4,
The trunk line concealment device 4 is connected to the TI SW 2-3.
このＴＯＳＷ ２−３は同期多重端局装置５と接続され
ている構成となっている。This TOSW 2-3 is configured to be connected to a synchronous multiplex terminal equipment 5.
電話機１から出力される音声のアナログ信号は、ＴＤ
ＳＷ ２−１の加入者線回路によってパルス符号変調（
以後ＰＣＭ符号化と記す）され、Ａ線を介して２Ｍ（２
メガ）局内インタフェースに変換された後に、音声帯域
圧縮装置３に入力される。例えば、この音声帯域圧縮装
置３は、６４Ｋｂ／ＳのＰＣＭ信号を適応差分パルス符
号変調（ＡＤＰＣＭ）方式により３２Ｋｂ／Ｓに圧縮す
る。この圧縮された残りのピントは：ダミービット（無
信号状態）として、６４Ｋｂ／Ｓのまま２Ｍ局内インタ
ーフェースに変換される。The audio analog signal output from telephone 1 is TD
Pulse code modulation (
(hereinafter referred to as PCM encoding), and 2M (2M) is encoded via the A line.
After being converted into an in-office interface (Mega), it is input to the voice band compression device 3. For example, this voice band compression device 3 compresses a 64 Kb/S PCM signal to 32 Kb/S using an adaptive differential pulse code modulation (ADPCM) method. The remaining compressed bits are converted to the 2M intra-office interface as dummy bits (no signal state) with 64 Kb/S.
高能率符号化された信号は、ＴＤ ＳＷ ２−２に戻る
。The high efficiency encoded signal returns to TD SW 2-2.
ＴＤ ＳＷ ２−２は秘匿を行う場合には、Ｂ線を選択
し、無秘匿の場合には、Ｃ線を選択する。秘匿を行う場
合、高能率符号化信号は、中継線秘匿装置４に入力され
る。中継線秘匿装置４は２Ｍ局内インタフェースから各
チャネルの分解を行い、その各々のチャネルに対して秘
匿の大切を制御する。したがって、中継線秘匿装置は、
局内加入者に共用使用可能となる。The TD SW 2-2 selects the B line when performing secrecy, and selects the C line when performing non-secrecy. In the case of concealment, the high-efficiency encoded signal is input to the trunk concealment device 4. The trunk line concealment device 4 decomposes each channel from the 2M intra-office interface and controls the importance of concealment for each channel. Therefore, the trunk line concealment device is
It will be available for shared use by subscribers within the station.
中継線秘匿装置４から出力された秘匿信号は、ＴＯＳＷ
２−３に戻る。 ＴＯＳＷ ２−３は、この秘匿信号
を６４Ｋｂ／ＳのままＤ線を経て、同期多重端局装置５
に入力する。同期多重端局装置５は、上記したダミービ
ットを除去して、高能率の伝送路インターフェースに変
換して秘匿音声を送出する。The secret signal output from the trunk line secret device 4 is a TOSW
Return to 2-3. TOSW 2-3 transmits this secret signal as 64Kb/S through the D line to the synchronous multiplex terminal equipment 5.
Enter. The synchronous multiplex terminal device 5 removes the above-mentioned dummy bits, converts it into a highly efficient transmission line interface, and transmits the secret voice.
この発明は、上記したように、中継線秘匿装置は、６４
Ｘｂ／Ｓのまま処理を行うのでトランスペアレントな伝
送路内にあり、秘匿通信が可能となるとともに、秘匿が
局内加入者で共用使用でき、高能率符号化方式を通用す
る中継機に通用してきわめて有効な効果を奏する。In this invention, as described above, the trunk line concealment device has 64
Since processing is carried out as is in Xb/S, it is in a transparent transmission path, allowing for confidential communication, and can be shared by subscribers within the station, making it extremely suitable for repeaters that use high-efficiency encoding methods. It has an effective effect.
第１図は本発明の中継線秘匿方式を示すブロック図であ
る。
図において、２はディジタル交換機、３は音声帯域圧縮
装置、４は中継線秘匿装置、５は同期多重端局装置を示
す。FIG. 1 is a block diagram showing the trunk line concealment system of the present invention. In the figure, 2 is a digital exchange, 3 is a voice band compression device, 4 is a trunk line concealment device, and 5 is a synchronous multiplex terminal device.
Claims (1)
、帯域圧縮された信号をディジタル交換機（２）を介し
て秘匿装置（４）に接続し、該秘匿装置（４）の出力を
前記ディジタル交換機（２）を介して出力するように構
成し、帯域圧縮を行った後に、前記秘匿装置（４）を共
用して秘匿処理を行うことを特徴とする中継線秘匿方式
。A band compression device (3) is connected to the digital exchange (2), and the band compressed signal is connected to the security device (4) via the digital exchange (2), and the output of the security device (4) is transmitted to the digital A trunk line secrecy system characterized in that the secrecy device (4) is used in common to perform secrecy processing after being configured to output through an exchange (2) and performing band compression.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10005086A JPS62256555A (en) | 1986-04-29 | 1986-04-29 | Trunk line privacy system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10005086A JPS62256555A (en) | 1986-04-29 | 1986-04-29 | Trunk line privacy system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62256555A true JPS62256555A (en) | 1987-11-09 |
Family
ID=14263671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10005086A Pending JPS62256555A (en) | 1986-04-29 | 1986-04-29 | Trunk line privacy system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62256555A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04123564A (en) * | 1990-09-14 | 1992-04-23 | Hitachi Ltd | Relay exchange |
-
1986
- 1986-04-29 JP JP10005086A patent/JPS62256555A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04123564A (en) * | 1990-09-14 | 1992-04-23 | Hitachi Ltd | Relay exchange |
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