JPS59214349A - Multiplex communication system of sound circuit - Google Patents
Multiplex communication system of sound circuitInfo
- Publication number
- JPS59214349A JPS59214349A JP8860083A JP8860083A JPS59214349A JP S59214349 A JPS59214349 A JP S59214349A JP 8860083 A JP8860083 A JP 8860083A JP 8860083 A JP8860083 A JP 8860083A JP S59214349 A JPS59214349 A JP S59214349A
- Authority
- JP
- Japan
- Prior art keywords
- digital signal
- signal
- audio
- bit sequence
- bit
- 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
- H04J—MULTIPLEX COMMUNICATION
- H04J9/00—Multiplex systems in which each channel is represented by a different type of modulation of the carrier
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Time-Division Multiplex Systems (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の属する技術分野〕
本発明は、音声信号を差分変調によりディジタル信号に
変調して伝送する第一のディジタル信号に１この第一の
ディジタル信号より十分に速度の遅い別の第二のディジ
タル信号（例えば制御信号または計測信号など）を多重
して伝送する方式に関する。Detailed Description of the Invention [Technical Field to which the Invention Pertains] The present invention provides a first digital signal that modulates an audio signal into a digital signal by differential modulation and transmits the digital signal. The present invention relates to a method of multiplexing and transmitting a second, slower digital signal (for example, a control signal or a measurement signal).
従来、この種の多重通信方式は音声帯域（０，３〜３．
４ｋＨｚ ）を帯域分割し、音声信号用に下位帯域を用
い、テイジタル信号用に上位帯域を使用して、音声信号
とＦＳＫ （Ｆｒｅｑｕｅｎｃｙ ５ｈｉｆｔ ｋｅｙ
ｉｎｇ ）方式によるディジタル信号を多重化した信号
に対して差分変調および復調を行っていた。したがって
、音声信号が使用できる帯域が制限を受は音質劣化を生
じる欠点があった。Conventionally, this type of multiplex communication system has been used in the voice band (0, 3 to 3...
4kHz) is divided into bands, the lower band is used for the audio signal, and the upper band is used for the digital signal.
Differential modulation and demodulation were performed on a signal obtained by multiplexing digital signals using the ing) method. Therefore, the band in which the audio signal can be used is limited, resulting in deterioration of sound quality.
本発明者は、音声信号の差分変調出力である第一のディ
ジタル信号のビット列のビット誤りが多少増加しても、
復調音声の音質の劣化は少ない点に着目し、本発明を完
成するに至った。The present inventor has discovered that even if the bit errors in the bit string of the first digital signal, which is the differentially modulated output of the audio signal, increase to some extent,
The present invention was completed by focusing on the fact that the deterioration of the sound quality of demodulated audio is small.
本発明は、音声信号が差分変調された第一のディジタル
信号列のうち第二のディジタル信号に同期するビットを
この第二のディジタル信号におき代えて送信することに
よυ、音声信号が使用できる帯域（０，３〜３．４ｋＨ
ｚ ） ｆ制限することなく音声信号と第二のディジタ
ル信号とを伝送できる音声回線の多重通信装置を提供す
ることを目的とする。The present invention enables the audio signal to be used by replacing the bits synchronized with the second digital signal in the first digital signal sequence in which the audio signal is differentially modulated with the second digital signal. Bandwidth (0.3~3.4kHz)
z) An object of the present invention is to provide an audio line multiplex communication device capable of transmitting an audio signal and a second digital signal without limiting f.
本発明は、送信装置には、音声信号が差分変調された第
一のディジタル信号列のうち、別の第二のディジタル信
号に同期するビラトラこの第二のディジタル信号におき
代えて送信する信号多重手段を備え、受信装置には、受
信されるディジタル信号をそのまま差分復調する手段と
、受信されるディジタル信号から上記第二のディジタル
信号の同期を識別する手段と、この識別する手段により
識別された同期に基き上記受信されるディジタル信号か
ら上記第二のディジタル信号を抽出する手段とを備えた
ことを特徴とする。The present invention provides a transmitter with a first digital signal sequence in which an audio signal is differentially modulated. means for differentially demodulating the received digital signal as it is; means for identifying synchronization of the second digital signal from the received digital signal; and means for extracting the second digital signal from the received digital signal based on synchronization.
本発明の実施例について、図面を参照して説明する。図
は本発明一実施例多重通信装置のブロック構成図である
。音声入力端子１には音声信号を差分変調する差分変調
部２が接続される。第二のディジタル信号入力端子３と
前記差分変調部２とには、差分変調された第一のディジ
タル信号列のうち第二のディジタル信号に同期するビッ
トをこの第二のディジタル信号におき代える信号多重部
４が接続される。信号多重部４には、伝送路入力端子５
が接続される。伝送路６が前記伝送路入力端子５と伝送
路出力端子７との間に介挿される。Embodiments of the present invention will be described with reference to the drawings. The figure is a block diagram of a multiplex communication device according to an embodiment of the present invention. A differential modulation section 2 for differentially modulating an audio signal is connected to the audio input terminal 1. A second digital signal input terminal 3 and the differential modulation section 2 receive a signal that replaces the bits synchronized with the second digital signal of the differentially modulated first digital signal sequence with this second digital signal. A multiplex unit 4 is connected. The signal multiplexing section 4 has a transmission line input terminal 5.
is connected. A transmission line 6 is inserted between the transmission line input terminal 5 and the transmission line output terminal 7.
伝送路出力端子７には、信号多重部４の出力を音声信号
に復調する差分復調部８が接続される。差分復調部８に
は、復調音声出力端子９が接続される。また伝送路出力
端子７には、信号多重部４にて第一のディジタル信号の
ビット列に第二のディジタル信号を多重化したタイミン
グ（位相）と同相のクロックを発生する同期検出部１０
と、そのクロックに同期して差分変調信号より第二のデ
ィジタル信号を取出すデータ保持部１１が接続される。A differential demodulation section 8 that demodulates the output of the signal multiplexing section 4 into an audio signal is connected to the transmission path output terminal 7. A demodulated audio output terminal 9 is connected to the differential demodulation section 8 . Further, at the transmission line output terminal 7, there is a synchronization detection section 10 that generates a clock that is in phase with the timing (phase) at which the second digital signal is multiplexed onto the bit string of the first digital signal in the signal multiplexing section 4.
and a data holding section 11 that extracts a second digital signal from the differential modulation signal in synchronization with the clock.
同期検出部１０とデータ保持部１１とは同期信号線１２
で接続される。またデータ保持部１１には、第二のディ
ジタル信号出力端子１３が接続される。The synchronization detection section 10 and the data holding section 11 are connected to the synchronization signal line 12.
Connected with Further, a second digital signal output terminal 13 is connected to the data holding section 11 .
このような構成の多重通信装置の動作を説明する。音声
入力端子１から入力した信号は、差分変調部２にて差分
変調を受けその変調された第一のディジタル信号のビッ
ト列ＢＣが信号多重部４に入力する。信号多重部４には
、ビット列Ｅｌの他に第二のディジタル信号入力端子３
より入力した第二のディジタル信号ＤＢが入力する。信
号多重部４にて、第二のディジタル信号ＤＳの伝送速度
に相応してビット列ＢＣの１ビツトのみを第二のディジ
タル信号ＤＢにおき代える。そのビット列ｉＢＣ’とす
る。伝送路出力端子５に出力されるビット列ＢＣ’は、
差分復調部８にて音声信号に復調される。なお、音声復
調に使用する差分変調出力はビット列ＢＣではなくビッ
ト列Ｂｅ’を使用しているが、ビット列ＢＯのビット誤
率が１０−３まで劣化しても、復調音声の箸質劣化は少
ないので、ビット列ＢＣの代りにビット列ＢＣ”ｉ使用
しても音声は十分に復調できる。たとえば、差分変調速
度が６４ｋＨｚであれば、ビット列ＢＣで１秒間に５０
ビツトの誤りが発生しても、復調音声の音質劣化はない
。つまり、第二のディジタル信号ＤＢの伝送速度全５０
ビツトフ秒としたビット列Ｂｅ／を使用しても復調音声
の音質劣化はない。The operation of the multiplex communication device having such a configuration will be explained. A signal inputted from the audio input terminal 1 is subjected to differential modulation at a differential modulation section 2, and a bit string BC of the modulated first digital signal is inputted to a signal multiplexing section 4. The signal multiplexing unit 4 includes a second digital signal input terminal 3 in addition to the bit string El.
A second digital signal DB input from the input terminal DB is input. The signal multiplexer 4 replaces only one bit of the bit string BC with the second digital signal DB in accordance with the transmission speed of the second digital signal DS. Let this bit string be iBC'. The bit string BC' output to the transmission line output terminal 5 is
The differential demodulator 8 demodulates the signal into an audio signal. Note that the differential modulation output used for audio demodulation uses the bit string Be' instead of the bit string BC, but even if the bit error rate of the bit string BO degrades to 10-3, there is little deterioration in the quality of the demodulated audio. , even if bit string BC"i is used instead of bit string BC, audio can be demodulated sufficiently. For example, if the differential modulation rate is 64 kHz, bit string
Even if a bit error occurs, there is no deterioration in the quality of the demodulated audio. In other words, the total transmission speed of the second digital signal DB is 50
There is no deterioration in the sound quality of the demodulated audio even if the bit string Be/ in bits of seconds is used.
甘だ、伝送路出力端子７に出力されるビット列ＢＯ’は
、同期検出部１０に接続されており、同期検出部１０は
、信号多重部４にてビット列ＢＣに第二のディジタル信
号ＤＳを多重化するタイミング（位相）と同相のクロッ
クを発生し、同期信号線１２に出力する。データ保持部
１１は、同期信号線１２より出力される同期信号（クロ
ック）に同期して、ビット列ＢＣ′列のデータを保持す
る。したがって、ビット列ＢＣ’列の第二のディジタル
信号ＤＥＩを同期信号により取出し、第二のディジタル
信号出力端子１３に送出する。The bit string BO' output to the transmission path output terminal 7 is connected to the synchronization detection section 10, and the synchronization detection section 10 multiplexes the second digital signal DS on the bit string BC in the signal multiplexing section 4. A clock having the same phase as the timing (phase) of the synchronization is generated and output to the synchronization signal line 12. The data holding unit 11 holds the data of the bit string BC' in synchronization with a synchronizing signal (clock) output from the synchronizing signal line 12. Therefore, the second digital signal DEI of the bit string BC' is extracted by the synchronization signal and sent to the second digital signal output terminal 13.
本発明は、以上説明したように、音声帯域（０，６〜３
．４ｋＨｚ ）を制限せずに、音声信号が差分変調され
た第一のディジタル信号列のうち第二のディジタル信号
に同期するビットを、この第二のディジタル信号におき
代えて多重化して送信することにより、装置構成が簡単
化され、復調音声の音質劣化を生じることなく、音声信
号と第二のディジタル信号とを伝送できる優れた効果が
ある。As explained above, the present invention is applicable to the audio band (0,6 to 3
．． 4kHz), replace the bits synchronized with the second digital signal of the first digital signal sequence in which the audio signal is differentially modulated with the second digital signal, and multiplex and transmit the signal. This simplifies the device configuration and has the excellent effect of transmitting the audio signal and the second digital signal without deteriorating the sound quality of the demodulated audio.
図は本発明一実施例多重通信装置のブロック構成図。
■・・・音声入力端子、２・・−差分変調部、３・・・
第二のディジタル信号入力端子、４・・・信号多重部、
５・・・伝送路入力端子、６・・・伝送路、７・・・伝
送路出力端子、８・・・差分復調部、９・・−復調音声
出力端子、１０・・・同期検出部、１１・・・データ保
持部、１２・・・同期信号線、１３・・・第二のディジ
タル信号出力端子。
特許出願人 日本電気株式会社
代理人 弁理士 井 出 直 孝The figure is a block diagram of a multiplex communication device according to an embodiment of the present invention. ■...Audio input terminal, 2...-differential modulation section, 3...
second digital signal input terminal, 4...signal multiplexing section,
5... Transmission line input terminal, 6... Transmission line, 7... Transmission line output terminal, 8... Differential demodulation section, 9... - demodulated audio output terminal, 10... Synchronization detection section, DESCRIPTION OF SYMBOLS 11... Data holding part, 12... Synchronization signal line, 13... Second digital signal output terminal. Patent applicant: NEC Corporation Representative Patent attorney: Naotaka Ide
Claims (1)
に、この第一のディジタル信号の伝送速一度より伝送速
度が十分に小さい別の第二のディジタル信号を多重して
伝送する音声回線の多重通信方式送信装置には、上記音
声信号が差分変調された第一のディジタル信号列のうち
、上記第二のディジタル信号に同期するビットをこの第
二のディジタル信号におき代えて送信する信号多重手段
を備え、 受信装置には、受信されるディジタル信号をそのまま差
分復調する手段と、受信されるディジタル信号から上記
第二のディジタル信号の同期を識別する手段と、この識
別する手段により識別された同期に基き上記受信される
ディジタル信号から上記第二のディジタル信号を抽出す
る手段とを備えたことを特徴とする音声回線の多重通信
方式。(1) An audio line that multiplexes and transmits a first digital signal, which is a differentially modulated audio signal, with another second digital signal whose transmission speed is sufficiently lower than that of the first digital signal. The multiplex communication system transmitter includes a signal multiplexer for transmitting a first digital signal sequence in which the audio signal is differentially modulated, replacing bits synchronized with the second digital signal with the second digital signal. means for differentially demodulating the received digital signal as it is; means for identifying synchronization of the second digital signal from the received digital signal; and means for extracting the second digital signal from the received digital signal based on synchronization.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8860083A JPS59214349A (en) | 1983-05-19 | 1983-05-19 | Multiplex communication system of sound circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8860083A JPS59214349A (en) | 1983-05-19 | 1983-05-19 | Multiplex communication system of sound circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59214349A true JPS59214349A (en) | 1984-12-04 |
Family
ID=13947317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8860083A Pending JPS59214349A (en) | 1983-05-19 | 1983-05-19 | Multiplex communication system of sound circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59214349A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6195029A (en) * | 1984-10-15 | 1986-05-13 | Mitsui Toatsu Chem Inc | Production of polyimide resin powder, bonding method and film-forming method using polyimide resin powder |
-
1983
- 1983-05-19 JP JP8860083A patent/JPS59214349A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6195029A (en) * | 1984-10-15 | 1986-05-13 | Mitsui Toatsu Chem Inc | Production of polyimide resin powder, bonding method and film-forming method using polyimide resin powder |
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