JPS59101941A - Data transferring system - Google Patents

Data transferring system

Info

Publication number
JPS59101941A
JPS59101941A JP21124282A JP21124282A JPS59101941A JP S59101941 A JPS59101941 A JP S59101941A JP 21124282 A JP21124282 A JP 21124282A JP 21124282 A JP21124282 A JP 21124282A JP S59101941 A JPS59101941 A JP S59101941A
Authority
JP
Japan
Prior art keywords
code
significant bit
companding
data
transmitting
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
JP21124282A
Other languages
Japanese (ja)
Inventor
Toshihisa Yoshida
吉田　俊久
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
Nippon Electric Co Ltd
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, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP21124282A priority Critical patent/JPS59101941A/en
Publication of JPS59101941A publication Critical patent/JPS59101941A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/17—Time-division multiplex systems in which the transmission channel allotted to a first user may be taken away and re-allotted to a second user if the first user becomes inactive, e.g. TASI
    • H04J3/177—Freeze-out systems, e.g. taking away active sources from transmission

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

PURPOSE:To prevent deterioration of a communication quality with a simple constitution by executing a data transfer by use of the least significant bit in transmitting and receiving codes in case when a companding code exceeds a fixed value. CONSTITUTION:A transmitting sound signal 117 is converted to a digital code of eight bits in accordance with a fixed companding rule by an encoder 109 and is stored in a shift register 108. Subsequently, the magnitude of a companding code in the digital code and a value determined in advance is compared 104. On the other hand, a transmitting data buffer 107 accumulates transmitting data 116, selects and outputs selectively the least significant bit in the digital code of the transmitting sound signal 117 and an utput signal of the buffer 107, by an output of the circuit 104, and inserts them into the least significant bit of a transmitting code 121. Also, a receiving data buffer 102 inputs the least significant bit of a receiving code 110 by an output of the circuit 104. In this way, when a companding signal exceeds a fixed value, a data transfer is executed by use of the least significant bit of the transmitting and receiving codes.

Description

【発明の詳細な説明】 本発明は、データ転送方式に関し、特に圧伸側符号によ
って音声信号を送受する時分割通信方式の通話路を利用
したデーｊ転送方式に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a data transfer system, and more particularly to a data transfer system that utilizes a time-division communication channel for transmitting and receiving audio signals using companding codes.

従来のこの種データ転送方式は、通話中の無音状態を検
出して、無音状態のときに通話路へ転送データを挿入す
ると同時に、相手側に同期信号を送出して通話路にデー
タが挿入・されたことを通知し、受信側では前記同期信
号を検出したときに通話路の信号をデータとして取り込
むという方式が採用されている。上述の無音状態を検出
する装置は複雑高価であり回路規模も大きくなるため、
データ転送量がさほど大きくないときは割高となる欠点
がある。This type of conventional data transfer method detects silence during a call, inserts transferred data into the communication path during the silence, and at the same time sends a synchronization signal to the other party to insert data into the communication path. A system is adopted in which the receiving side receives the signal on the communication path as data when it detects the synchronization signal. The device for detecting the silent state mentioned above is complicated and expensive, and the circuit size is large.
It has the disadvantage of being relatively expensive when the amount of data transferred is not very large.

また、通話路の符号列の最下位ビットを定期的にデータ
転送用に割り当て、送信側と受信側で同期をとりながら
データ転送を行なう方式も採用されている。この場合は
、上記送受信間で同期をとるだめの回路が必要となり周
辺回路が増加し複雑化するのみならす１通話品質が劣化
するという欠点がある。特に、音声レベルが低い場合は
、符号器、復号器、フィルタ等の特性から信号対雑音比
が悪化するため通話品質の劣化が犬となる。A method has also been adopted in which the least significant bit of the code string of the communication path is periodically allocated for data transfer, and the data transfer is performed while synchronizing the transmitting and receiving sides. In this case, a circuit for synchronizing the transmission and reception is required, which not only increases the number of peripheral circuits and complicates them, but also degrades the quality of one call. In particular, when the voice level is low, the signal-to-noise ratio deteriorates due to the characteristics of the encoder, decoder, filter, etc., resulting in deterioration of speech quality.

本発明の目的は、上述の従来の欠点を角′ｒ決し。The object of the present invention is to overcome the above-mentioned drawbacks of the prior art.

簡易、安価な部品の追加によ！ｌ１通話品質を劣化させ
ないでデータ転送にオニ１用することが可能なデータ転
送方式を提供することにある。By adding simple and inexpensive parts! To provide a data transfer system that can be used for data transfer without deteriorating the quality of an I1 call.

本発明のデータ転送方式は、音声信号を一定の圧伸側に
よってデジタル符号化して送受する時分割通信方式にお
いて、前記デジタル符号中の圧伸符号とあらかじめ定め
た値との大小を比較する比較［すＪ路と、別の送４ｇデ
ータを蓄積する送信データバッファと、送信音声のデジ
タル杓−号中の最下位ビットと１１１記送信データバツ
フアの出力（Ｑ−号とを前記比較回路の出力信号によっ
て択一的に選択出力して送信イ］・号の最下位ビットに
挿入する手段と、受（ｇ符号の最下位ビットを前記比較
回路の出力によって取り込む受信データバッファとを備
えて。The data transfer method of the present invention is a time-division communication method in which an audio signal is digitally encoded by a certain companding side and transmitted and received, and a comparison [ A transmission data buffer that stores another transmission 4g data, the least significant bit in the digital signal of the transmission audio, and the output (Q signal) of the transmission data buffer No. 111 are connected by the output signal of the comparison circuit. means for selectively outputting and inserting it into the least significant bit of the transmitted code; and a receiving data buffer for taking in the least significant bit of the receiving (g) code by the output of the comparison circuit.

前記圧伸符号が一定値以上のとき送受信符号の最下位ビ
ットを使用してデータの転送を行なうことを特徴とする
。The present invention is characterized in that when the companding code is equal to or greater than a certain value, the least significant bit of the transmitted/received code is used to transfer data.

′次に１本発明について１図面を参照して詳細に説明す
る。'Next, one invention will be explained in detail with reference to one drawing.

図は、本発明の一実施例を示すブロック図である。すな
わち、送信音声信号１１７は符号器１０９によって一定
の圧伸側によって８ビツトのデジタル符号に変換出力さ
れて一旦シフトレジスタ１（）Ｈに格納される。最上位
ビットは極性符号であり、続く３ビツトは圧伸特性の折
線部を表現する圧伸符号であり、残り４ビツトと上記圧
伸符号とで音声信号の大きさがデジタル符号化されてい
る。通常の時分割通信方式においては、上記シフトレジ
スタ１０８の内容が通信路のタイムスロットに送出され
るのであるが、本実施例においては、シフトレジスタ１
（１８の最下位ビットはセレクタ口）６を介して並直変
換レジスタ１（）５の最下位に入力させる。The figure is a block diagram showing one embodiment of the present invention. That is, the transmitted audio signal 117 is converted into an 8-bit digital code by a certain companding side by the encoder 109, and is temporarily stored in the shift register 1()H. The most significant bit is a polarity code, the following 3 bits are a companding code that expresses the broken line part of the companding characteristic, and the remaining 4 bits and the above companding code digitally encode the size of the audio signal. . In a normal time division communication system, the contents of the shift register 108 are sent to the time slot of the communication channel, but in this embodiment, the contents of the shift register 108 are sent to the time slot of the communication path.
(The least significant bit of 18 is a selector port) 6 to be inputted to the least significant bit of the parallel/serial conversion register 1( ) 5.

上位７ビツトはそのまま並直変換レジスタ１（）５の対
応するビットに入力させる。そして、上記並直変換レジ
スタ１０５から送信符号１２１が通信路のタイムスロッ
トに送出される。セレクタ１（）６は、通常は、シフト
レジスタ１０８の最下位ビットを選択して並直変換レジ
スタ１０５の最下位ビットに供給しているから、従来と
同様な送信符号が通信路に送出される。The upper 7 bits are input as they are to the corresponding bits of the parallel-to-serial conversion register 1()5. Then, the transmission code 121 is sent from the parallel-to-serial conversion register 105 to the time slot of the communication channel. Since the selector 1( ) 6 normally selects the least significant bit of the shift register 108 and supplies it to the least significant bit of the parallel-to-serial conversion register 105, the same transmission code as before is sent to the communication channel. .

一方、送信データ信号１１６は送信データバッファ１（
）７に一時蓄槓されている。比較回路１０４がシフトレ
ジスタ１（１８の圧伸符号（３ビツト）とあらかじめ定
めた一定値との大小を比較し、−５ｆ値以上であるとき
は出力信号１１９をセレクタ１０６および送信データバ
ッファ１０７に送る。出力信号１１９によりセレクタ１
０６は送信データバッファ１０７の出力データを選択し
て前記並直変換レジスタ１（１５の最下位ビットに格納
させる。従って、送信符号１２１の最下位ビットには送
信データか挿入される。On the other hand, the transmission data signal 116 is transmitted from the transmission data buffer 1 (
) 7 has been temporarily stored. Comparison circuit 104 compares the companding code (3 bits) of shift register 1 (18) with a predetermined constant value, and if the value is greater than or equal to -5f value, output signal 119 is sent to selector 106 and transmission data buffer 107. Output signal 119 causes selector 1 to be sent.
06 selects the output data of the transmission data buffer 107 and stores it in the least significant bit of the parallel-to-serial conversion register 1 (15). Therefore, the transmission data is inserted into the least significant bit of the transmission code 121.

本実施例では、シフトレジスタ１０８と、並直変換レジ
スタ１（）５と、セレクタ１（１６とで「送４’？ｆ’
ＩＬｔ声のデジタル符号中の最下位ビットと前記送信デ
ータバッファの出力信号とを前記比較回路の出力信号に
よって択一的に選択出力して送信符号の最下位ビットに
挿入する手段」を構成している０受信符号１１（ｌは、
シフトレジスタｌ　（１（ｌを介しで復号器１０１に入
力され、所定の圧伸側に従ってアナログ信号に変換され
受信音声信号１１２として出力すれる。一方、シフトレ
ジスタ１（１（１に格納された受信符号中の圧伸符号（
上位４ビツトから最上位の極性ビットを除いた３ビツト
）を比較回路１０４に入力させ、比較回路１０４は上記
圧伸符号か一定値より大であるとき出力信号１１５を受
信データバッファ１０２に送る。これにより受信データ
バッファ１（１２は、シフトレジスタ１（１（ｌの最下
位ビットを受信データとして取り込む。受信データバッ
ファ１Ｃ）２には、受信符号１１（Ｉ中の圧伸符号が一
定値以上になるごとに一受信符号１１　ｉの最下位ビッ
トが受信データとして取り込まれて蓄積され、適時受４
Ｍデータ信号１１４として読み出される。本実施例では
、既存の時分割通信路に、並直変換レジスタ１（＋５　
、比較回路１０４．セレクタ１０６および送、受信デー
タバッファ１（１７，０１２を追加するのみで通話路を
利用したデータ転送が可能となる。すなわち、簡易、安
価な部品の追加により通話路をデータ転送に利用できる
効果がある。また、圧伸符号が一定値以上のときの最下
位ビットを利用するから通話品質の劣化は問題とならな
い。音声レベルが低い場合には信号対雑音比の劣化は全
く生じないから極めて有利な方式で本る。In this embodiment, the shift register 108, the parallel-to-serial conversion register 1 () 5, and the selector 1 (16)
means for selectively outputting the least significant bit in the digital code of the ILt voice and the output signal of the transmission data buffer according to the output signal of the comparison circuit and inserting the same into the least significant bit of the transmission code. 0 reception code 11 (l is
It is input to the decoder 101 via the shift register l (1 The companding code in the received code (
(3 bits excluding the most significant polarity bit from the upper 4 bits) are input to a comparison circuit 104, and the comparison circuit 104 sends an output signal 115 to the reception data buffer 102 when the companding code is greater than a certain value. As a result, the reception data buffer 1 (12 takes in the least significant bit of the shift register 1 (1 (l) as reception data. The reception data buffer 1C) 2 stores the reception code 11 (the companding code in The least significant bit of one received code 11i is captured and stored as received data every time the received code 11i is received.
It is read out as an M data signal 114. In this embodiment, parallel-to-serial conversion register 1 (+5
, comparison circuit 104. By simply adding the selector 106 and the sending/receiving data buffer 1 (17,012), it becomes possible to transfer data using a communication path.In other words, by adding simple and inexpensive parts, it is possible to use a communication path for data transfer. Also, since it uses the least significant bit when the companding code is above a certain value, deterioration in speech quality is not a problem.When the voice level is low, there is no deterioration in the signal-to-noise ratio, so it is extremely advantageous. I will write the book in this way.

以上のように、本発明においては、圧伸符号が一冗値以
上であるときの送、受信符号中の最下位ビットを使用し
てデータ転送を行なうように構成したから、１π」易、
安価な部品の追加によって通話路を利用したデータ転送
が可能となシ、しかも通話品質を劣化さぜないという効
果がある。圧伸符号による時分割伝送路９時分割電子９
換機等に適用することができる。As described above, in the present invention, data is transferred using the least significant bit of the transmitting and receiving code when the companding code is equal to or greater than the redundant value.
By adding inexpensive parts, it is possible to transfer data using a communication channel, and there is an effect that the communication quality is not deteriorated. Time-division transmission line 9 based on companding code Time-division electronics 9
It can be applied to switching equipment, etc.

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

図は本発明の一実施例を示すブロック図である。 図において、　　　１（＋（１，１ｉ１８・・・シフト
レジスタ１（１１・・・復号器　　１（１２・・・受信
データバッファ１（）４・・・比較回路　　１（）５・
・・並直変換レジスタ１（）６・・・セレクタ　　１（
１７・・・送信データバッファ１０９・・・符号器　　
１１（１・・・受信符号　　１１２・・・受信音声信号
　　１１４・・・受信データ信号　　１１５．１１９・
・・比較回路１０４の出力信号　　１１６・・・送信デ
ータ信号　　１１７・・・送信音声信号　　１２１・・
・送信符号。The figure is a block diagram showing one embodiment of the present invention. In the figure, 1(+(1,1i18...Shift register 1(11...Decoder 1(12...Receive data buffer 1()4...Comparison circuit 1()5.
... Parallel-to-serial conversion register 1 () 6 ... Selector 1 (
17... Transmission data buffer 109... Encoder
11 (1...Reception code 112...Reception audio signal 114...Reception data signal 115.119.
... Output signal of comparison circuit 104 116 ... Transmission data signal 117 ... Transmission audio signal 121 ...
・Transmission code.

Claims (1)

【特許請求の範囲】[Claims] 音声信号を一定の圧伸則によってデジタル符号化して送
受する時分割通信方式において、前記デジタル符号中の
圧伸符号とあらかじめ定めだ値との大小を比較する比較
回路と、別の送信データを蓄積する送信データバッファ
と、送信音声のデジタル符号中の最下位ビットと前記送
信データバッファの出力信号とを前記比較回路の出力信
号によって択一的に選択出力して送信符号の最下位ビッ
トに挿入する手段と、受信符号の最下位ビットを前記比
較回路の出力によって取シ込む受信データバッファとを
備えて、前記圧伸符号が一定値以上のとき送受信符号の
最下位ビットを使用してデータの転送を行なうことを特
徴とするデータ転送方式。In a time-division communication system in which an audio signal is digitally encoded according to a certain companding rule and then transmitted and received, a comparator circuit that compares the companding code in the digital code with a predetermined value and stores other transmission data. selectively outputs the least significant bit of the digital code of the transmitted audio and the output signal of the transmitted data buffer according to the output signal of the comparison circuit, and inserts it into the least significant bit of the transmitted code. and a reception data buffer for receiving the least significant bit of the received code by the output of the comparison circuit, the data is transferred using the least significant bit of the transmitted and received code when the companding code is equal to or greater than a certain value. A data transfer method characterized by performing the following.
JP21124282A 1982-12-03 1982-12-03 Data transferring system Pending JPS59101941A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21124282A JPS59101941A (en) 1982-12-03 1982-12-03 Data transferring system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21124282A JPS59101941A (en) 1982-12-03 1982-12-03 Data transferring system

Publications (1)

Publication Number Publication Date
JPS59101941A true JPS59101941A (en) 1984-06-12

Family

ID=16602638

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21124282A Pending JPS59101941A (en) 1982-12-03 1982-12-03 Data transferring system

Country Status (1)

Country Link
JP (1) JPS59101941A (en)

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