JPH05218982A - Analog voice line communication method - Google Patents

Abstract

PURPOSE:To attain excellent transmission of voice and additional information by applying phase modulation to analog voice information with the additional information desired to be sent and receiving additional information obtained from a threshold level discrimination output being a difference between a voice prediction device output of an opposite party and a voice signal from an actual talker together with the voice information in parallel. CONSTITUTION:A voice signal converted into a voltage by a microphone 11 from a talker passes through a voice characteristic adjustment device 112 set to the initial state and is modulated by using a phase modulator 12 based on voice quality of an opposite talker formed by a voice quality monitor 14 and an error correction coding device 13. The modulated voice of the talker is given to a voice prediction device 16 at an opposite party through an analog voice line 15 and a difference from the actual voice through a delay device 17 is obtained at an adder 18. The difference is discriminated by a threshold level discrimination device 19, and the opposite party obtains its own voice quality data via an error correction decoding device 110 and a demodulator 111. Thus, the opposite party uses the filter 112 to send the voice to the talker and the talker uses a microphone 21 via a speaker 213 surely to send the voice to the opposite party.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an analog voice line call method, and more particularly to an analog voice line call method for simultaneously transmitting voice information and additional information such as line quality.

[0002]

2. Description of the Related Art In a conventional analog voice line communication method, only a simultaneous transmission method of voice information using frequency division and additional information by a sub-channel is used in an analog voice communication line.

[0003]

In the above-mentioned conventional analog voice line communication method, the sub-channel data transmission system using frequency division causes poor voice quality due to line quality even in normal conversation. In addition to the voice (word) being difficult for the listener to distinguish, there is a problem that the quality of the voice is further deteriorated by monopolizing a part of the frequencies by the sub-channel.

[0004]

The analog voice line call method of the present invention is the analog voice line call method in which voice information and additional information are transmitted and received between a speaker side and a partner call side through an analog call line. A modulator for phase-modulating the voice information with additional information, a predictor for predicting only the voice information from the modulator output, a delay device for giving the delay amount generated in the predictor to the voice information, and the predictor. And an adder that outputs difference information of the output of the delay device, a threshold determiner that determines the difference information by a threshold, a demodulator that outputs the additional information for demodulation from the output of the threshold determiner, and the modulator And a speaker for outputting the audio information from the.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of an embodiment of the present invention.

In this embodiment, the talker side and the other party's talker side exchange voice information and additional information with analog call lines 15 and 25.
When transmitting and receiving by the, the phase demodulators 12 and 22 for phase demodulating the voice information by the additional information and the voice predictor (PREDI) that predicts only the voice information from the outputs of the phase modulators 12 and 22
C) 16 and 26, and delay devices (Delay) 17 and 27 that give the delay amount generated in the voice predictors 16 and 26 to the voice information.
, Adders 18 and 28 that output difference information between the outputs of the voice predictors 17 and 27 and delay devices 17 and 27, threshold determiners 19 and 29 that determine the difference information using thresholds, and threshold determiner 1
Demodulator 1 for outputting additional information for demodulation from the outputs of 9, 29
11 and 211, and speakers 113 and 213 that output audio information from the phase modulators 12 and 22, respectively.

Next, the operation of this embodiment will be described. The voice generated by the speaker is converted into a voltage by the microphone 11. The voice that has passed through the voice characteristic adjuster 112 in the initial setting state has the voice quality monitor 14 and the error correction coder (C
ODER) 13 and voice quality data on the talker side of the other party's caller are used for modulation using the phase modulator 12. The modulated voice of the speaker passes through the analog voice line 15 and is applied to the voice predictor 16 on the side of the other party, and the adder 18 obtains the difference from the actual voice that has passed through the delay unit 17. After the difference is judged by the threshold judgment unit 19, the error correction decoder (DECODER) 110 and the demodulator 1
The caller of the other party can obtain his or her voice quality data via 11. With this data, the other party can use the voice characteristic adjuster (FILTER) 112 to send a voice having more accurate characteristics to the speaker. Also microphone 2
The route from 1 to the speaker 213 is similar to the above, and the speaker can send the voice having the proper characteristics to the other party to the other party.

[0008]

As described above, according to the present invention, the speaker side performs phase modulation on the analog voice information with the information that the speaker wants to send to the other party, and the output of the voice predictor of the other party and the actual speaker By receiving the data information from the speaker side obtained from the threshold judgment output of the difference with the voice in parallel with the voice, the additional information can be transmitted at the same time as the good voice information.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

[Explanation of symbols]

11, 21 Microphone 12, 22 Phase modulator 13, 23 Error correction coder (CODER) 14, 24 Voice quality monitor (CHECKER) 15, 25 Analog voice line 16, 26 Voice predictor (PREDIC) 17, 27 Delay device (Delay) 18,28 Adder 19,29 Threshold value judgment device 110,210 Error correction decoding device (DEC)
ODER) 111,211 Demodulator 112,212 Voice characteristic adjuster (FILTER) 113,213 Speaker 121,221 Multiplier 122,222 Two-contact changer

Claims (1)

[Claims] 1. An analog voice line communication method in which voice information and additional information are transmitted and received between a speaker side and a partner caller side through an analog communication line, and a modulator for phase-modulating the voice information with the additional information, A predictor that predicts only the audio information from the modulator output, a delay device that gives the audio information a delay amount that occurs in the predictor, and an adder that outputs difference information between outputs of the predictor and the delay device. A threshold value determiner for determining the difference information with a threshold value, a demodulator for outputting the additional information for demodulation from the output of the threshold value determiner, and a speaker for outputting the audio information from the modulator. A featured analog voice line calling method.