JPS6320064B2 - - Google Patents
Info
- Publication number
- JPS6320064B2 JPS6320064B2 JP57137715A JP13771582A JPS6320064B2 JP S6320064 B2 JPS6320064 B2 JP S6320064B2 JP 57137715 A JP57137715 A JP 57137715A JP 13771582 A JP13771582 A JP 13771582A JP S6320064 B2 JPS6320064 B2 JP S6320064B2
- Authority
- JP
- Japan
- Prior art keywords
- audio signal
- frame
- sound source
- transmission
- vocoder
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/66—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
Description
【発明の詳細な説明】
本発明は、音声信号を音源及び共鳴系の特性を
表わす幾つかの特徴パラメータに分解して伝送
し、再びこれらの特徴パラメータにより上記音声
信号を再生するボコーダ方式によつて該音声信号
を伝送するようにしたデイジタル通信方式に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention uses a vocoder method that decomposes an audio signal into several characteristic parameters representing the characteristics of the sound source and resonance system, transmits it, and reproduces the audio signal again using these characteristic parameters. The present invention relates to a digital communication system in which the audio signal is transmitted using a digital communication method.
従来、この種ボコーダ方式を説明するものとし
て第１図に示すものがあつた。図において、１は
入力される音声信号Sioを音源及び共鳴系の特性
を表わす幾つかの特徴パラメータに分解して伝送
する送信装置、２は該送信装置１から伝送される
特徴パラメータにより上記音声信号を再生して再
生音声Sputを得る受信装置で、上記送信装置１
は、入力される音声信号Sioから音声周波数スペ
クトラムの包絡線成分を特徴パラメータとして抽
出するスペクトラム包絡パラメータ抽出回路３、
有声無声音の別、声帯振動周期等音源パラメータ
を抽出する音源パラメータ抽出回路４、これらパ
ラメータを変調し多重化して送出するマルチプレ
クサ５を備えており、また、上記受信装置２は各
特徴パラメータを復調するデマルチプレクサ６、
再生音声Sputを得る音源波形合成回路８、及びバ
リアブルフイルタ７を備えている。なお、９は伝
送路を示す。 Conventionally, there has been a system shown in FIG. 1 to explain this type of vocoder system. In the figure, reference numeral 1 indicates a transmitting device that decomposes an input audio signal Sio into several characteristic parameters representing the characteristics of the sound source and resonance system, and transmits the resulting signal. A receiving device that reproduces the signal and obtains the reproduced audio S put , which is the transmitting device 1 described above.
is a spectrum envelope parameter extraction circuit 3 that extracts the envelope component of the audio frequency spectrum from the input audio signal S io as a feature parameter;
It is equipped with a sound source parameter extraction circuit 4 that extracts sound source parameters such as voiced and unvoiced sounds and vocal cord vibration periods, and a multiplexer 5 that modulates, multiplexes, and sends out these parameters, and the receiving device 2 demodulates each characteristic parameter. Demultiplexer 6,
It is equipped with a sound source waveform synthesis circuit 8 for obtaining reproduced sound Sput , and a variable filter 7. Note that 9 indicates a transmission path.
したがつて第１図構成において、音声信号Sio
を入力する送信装置１は、スペクトラム包絡パラ
メータ抽出回路３と音源パラメータ抽出回路４に
よつて特徴パラメータ値を抽出し、マルチプレク
サ５により各特徴パラメータを多重化し伝送路９
を介して受信装置２に伝送するようになされ、受
信装置２では、デマルチプレクサ６により復調復
号した特徴パラメータ値をバリアブルフイルタ７
及び音源波形合成回路８を介して音声の再合成を
行うようになされている。 Therefore, in the configuration of FIG. 1, the audio signal S io
The transmitting device 1 that receives the input extracts characteristic parameter values using the spectrum envelope parameter extraction circuit 3 and the sound source parameter extraction circuit 4, multiplexes each characteristic parameter value using the multiplexer 5, and transmits the characteristic parameter values to the transmission path 9.
In the receiving device 2, the characteristic parameter values demodulated and decoded by the demultiplexer 6 are transmitted to the receiving device 2 via the variable filter 7.
and a sound source waveform synthesis circuit 8 to resynthesize the speech.
しかるに、上述した従来のボコーダ方式におい
て、送信装置１と受信装置２との間における特徴
パラメータの伝送フレームは、１フレーム毎に各
特徴パラメータを収容して構成し多重伝送してい
るので、特徴パラメータの数に応じてフレーム同
期をとらなければならなく、構成が複雑でかつ高
価なフレーム同期回路を必要としていた。 However, in the conventional vocoder method described above, the transmission frame of the feature parameters between the transmitting device 1 and the receiving device 2 is constituted by accommodating each feature parameter for each frame and is multiplexed. frame synchronization must be performed according to the number of frames, requiring a frame synchronization circuit that is complex and expensive.
そこで本発明は、上記のような従来のものの欠
点を除去するためになされたもので、拡散変調方
式に周波数ホツピング方式を用いることにより、
従来のボコーダ方式において必要とするフレーム
同期回路を省略できるデイジタル通信方式を提供
することを目的としている。 Therefore, the present invention was made to eliminate the drawbacks of the conventional ones as described above, and by using a frequency hopping method as a spread modulation method,
It is an object of the present invention to provide a digital communication system that can omit the frame synchronization circuit required in the conventional vocoder system.
以下、本発明の一実施例を図に基いて説明する
と、第２図において、１０は従来のボコーダ方式
と同様に伝送される特徴パラメータのフレーム列
で、各フレームF1，F2，F3……は各特徴パラメ
ータ値a1，b1，c1……，n1，a2，b2，c2，……，
n2，a3，b3，c3，……，n3をそれぞれ収容して構
成され、多重化されて伝送されるようになされて
いる。１１はその特徴パラメータの各フレームに
同期した周波数ホツピングを制御する符号Ｍの符
号列で、拡散変調方式にスペクトラム拡散通信方
式の１つである周波数ホツピング方式を用いて、
上記特徴パラメータ値の伝送を、ホツピング周期
と特徴パラメータの伝送周期とを一致させて伝送
するようになされている。 Hereinafter, one embodiment of the present invention will be described based on the drawings. In FIG. 2, numeral 10 indicates a frame sequence of feature parameters transmitted in the same way as in the conventional vocoder method, and each frame F 1 , F 2 , F 3 ... is each feature parameter value a 1 , b 1 , c 1 ..., n 1 , a 2 , b 2 , c 2 , ...,
It is configured to accommodate n 2 , a 3 , b 3 , c 3 , . . . , n 3 , respectively, and is multiplexed and transmitted. 11 is a code string of codes M for controlling frequency hopping synchronized with each frame of the characteristic parameters, and the frequency hopping method, which is one of the spread spectrum communication methods, is used as the spread modulation method.
The characteristic parameter values are transmitted by making the hopping period coincide with the characteristic parameter transmission period.
すなわち、周波数ホツピング方式は送信周波数
を所定時間毎に変えるもので、ホツピングを制御
する符号列１１の同期を自らとる方式であるの
で、したがつて、ボコーダ方式の特徴パラメータ
の数にホツピングを制御する符号Ｍの長さを対応
づけることにより、ボコーダ方式で従来必要とさ
れたフレーム同期回路が省略でき、伝送される特
徴パラメータ値のフレーム同期が簡単に達成でき
ることになる。 That is, the frequency hopping method changes the transmission frequency at predetermined time intervals, and synchronizes the code string 11 that controls hopping by itself. Therefore, hopping is controlled by the number of characteristic parameters of the vocoder method. By making the lengths of the codes M correspond to each other, the frame synchronization circuit conventionally required in the vocoder system can be omitted, and frame synchronization of the characteristic parameter values to be transmitted can be easily achieved.
なお、本発明においては、特徴パラメータを伝
送するフレーム列１０の各フレームとホツピング
を制御する符号列の各符号Ｍとの対応づけは必ず
しも１対１である必要はなく、例えば第３図に示
すように特徴パラメータのフレーム列１０の各フ
レームF1，F2，F3に２対１で対応する符号Ｍの
符号列１２で同期をとることもでき、要はホツピ
ング周期を特徴パラメータの各フレームの伝送周
期に整数倍の関係に保つて伝送すればよい。 Note that in the present invention, the correspondence between each frame of the frame sequence 10 for transmitting feature parameters and each code M of the code sequence for controlling hopping does not necessarily have to be one-to-one; for example, as shown in FIG. It is also possible to synchronize with the code string 12 of the code M, which corresponds 2:1 to each frame F 1 , F 2 , F 3 of the frame string 10 of the feature parameter, as shown in FIG. It is sufficient to transmit data while maintaining a relationship that is an integral multiple of the transmission period.
以上のように本発明によれば、ボコーダ方式に
よつて該音声信号を伝送するデイジタル通信方式
において、拡散変調方式に周波数ホツピング方式
を用い該ホツピング周期と上記特徴パラメータ値
の伝送周期とを整数倍の関係に保つて伝送するよ
うにしたので、従来のボコーダ方式におけるフレ
ーム同期回路を省略できるという効果がある。 As described above, according to the present invention, in a digital communication method that transmits the audio signal using a vocoder method, a frequency hopping method is used as a spread modulation method, and the hopping period and the transmission period of the characteristic parameter value are set to be an integer multiple. Since the relationship is maintained during transmission, there is an effect that the frame synchronization circuit in the conventional vocoder system can be omitted.
第１図は従来のボコーダ方式を説明するための
一般的構成図、第２図と第３図はこの発明のデイ
ジタル通信方式を説明する特徴パラメータのフレ
ーム列と符号列との関係説明図である。
１；送信装置、２；受信装置、３；スペクトラ
ム包絡パラメータ抽出回路、４；音源パラメータ
抽出回路、５；マルチプレクサ、６；デイマルチ
プレクサ、７；バリアブルフイルタ、８；音源波
形合成回路、９；伝送路、１０；特徴パラメータ
の伝送フレーム列、１１，１２；周波数ホツピン
グ方式における符号列、a1，b1，c1……n1，a2，
b2，c2……，n2；各特徴パラメータ値、F1，F2，
……，F3；フレーム、Ｍ；符号。
FIG. 1 is a general configuration diagram for explaining a conventional vocoder method, and FIGS. 2 and 3 are explanatory diagrams of the relationship between frame strings and code strings of characteristic parameters to explain the digital communication method of the present invention. . 1; Transmitting device; 2; Receiving device; 3; Spectrum envelope parameter extraction circuit; 4; Sound source parameter extraction circuit; 5; Multiplexer; 6; Day multiplexer; 7; Variable filter; 8; Sound source waveform synthesis circuit; 9; Transmission line , 10; Transmission frame sequence of feature parameters, 11, 12; Code sequence in frequency hopping method, a 1 , b 1 , c 1 ... n 1 , a 2 ,
b 2 , c 2 ..., n 2 ; each feature parameter value, F 1 , F 2 ,
..., F 3 ; frame, M; code.
Claims (1)
つかの特徴パラメータに分解して伝送し、再びこ
れらの特徴パラメータにより上記音声信号を再生
するボコーダ方式によつて該音声信号を伝送する
デイジタル通信方式において、拡散変調方式に周
波数ホツピング方式を用い該ホツピング周期を上
記特徴パラメータ値の伝送周期の整数倍の関係に
保つて伝送することを特徴とするデイジタル通信
方式。1. A digital communication system that transmits an audio signal by decomposing it into several characteristic parameters representing the characteristics of the sound source and resonance system, and then transmitting the audio signal using a vocoder method that regenerates the audio signal using these characteristic parameters. A digital communication method characterized in that a frequency hopping method is used as a spread modulation method and the hopping period is maintained as an integral multiple of the transmission period of the characteristic parameter value for transmission.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57137715A JPS5927632A (en) | 1982-08-06 | 1982-08-06 | Digital communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57137715A JPS5927632A (en) | 1982-08-06 | 1982-08-06 | Digital communication system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5927632A JPS5927632A (en) | 1984-02-14 |
| JPS6320064B2 true JPS6320064B2 (en) | 1988-04-26 |
Family
ID=15205123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57137715A Granted JPS5927632A (en) | 1982-08-06 | 1982-08-06 | Digital communication system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5927632A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03109167U (en) * | 1990-02-22 | 1991-11-08 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6147032B2 (en) * | 2013-03-07 | 2017-06-14 | 大崎電気工業株式会社 | Secure communication method |
-
1982
- 1982-08-06 JP JP57137715A patent/JPS5927632A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03109167U (en) * | 1990-02-22 | 1991-11-08 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5927632A (en) | 1984-02-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU770627B2 (en) | Method for inserting auxiliary data in an audio data stream | |
| US2151091A (en) | Signal transmission | |
| US4342104A (en) | Helium-speech communication | |
| JP5792710B2 (en) | Sinusoidal coding | |
| DK0976302T3 (en) | Apparatus and method for programming a digital hearing aid | |
| AU6816794A (en) | Apparatus and method for coding or decoding signals, and recording medium | |
| ATE143544T1 (en) | METHOD FOR TRANSMITTING AND/OR STORING DIGITAL SIGNALS OF MULTIPLE CHANNELS | |
| GB1393743A (en) | Narrow band digital speech communication system | |
| JPS5936275B2 (en) | Residual excitation predictive speech coding method | |
| JPS60206336A (en) | Digital voice coder having base band remining coding | |
| MY130167A (en) | Information encoding method and apparatus, information decoding method and apparatus, information transmission method and information recording medium | |
| CA2006487C (en) | Communication system capable of improving a speech quality by effectively calculating excitation multipulses | |
| US4612414A (en) | Secure voice transmission | |
| SE9902057D0 (en) | A Method of Improving the Intelligence of a Sound Signal, and a Device for Reproducing a Sound Signal | |
| DE3482896D1 (en) | SYNCHRONIZATION OF REPLACABLE TACTICAL OSCILLATORS WHEN TRANSMITTING DIGITAL SIGNALS. | |
| AU600083B2 (en) | Multi-pulse type encoder having a low transmission rate | |
| JPS5927632A (en) | Digital communication system | |
| DE3471563D1 (en) | Sub-band coding method | |
| JPS60107933A (en) | Adpcm encoding device | |
| Slaymaker | Bandwidth compression by means of vocoders | |
| JP3133353B2 (en) | Audio coding device | |
| JP3166673B2 (en) | Vocoder encoding / decoding device | |
| JP2853126B2 (en) | Multi-pulse encoder | |
| JP2000341652A (en) | Hearing compensation method for digital broadcasting and receiving apparatus used therefor | |
| JPS5915299A (en) | Voice analyzer |