JPS61274462A - Sound volume adjusting system - Google Patents

Abstract

PURPOSE:To realize economically the adjustment of listening sound volume by providing concentratingly a means required for listened sound volume adjustment in a voice storage device in a voice store and forward exchange network and applying amplification and attenuation control to a voice signal to a subscriber in response to a pushbutton tone corresponding predetermined sound volume adjustment command. CONSTITUTION:A subscriber 10 uses a pushbutton telephone set 11 to extract a voice message from a voice store and forward device 3 and listens to it. The pushbutton tone generated from the telephone set 11 by the subscriber 10 is converted into a digital signal by a voice coder 14 via a hybrid transformer 12 and sent to the voice store and forward device 3 through a digital exchange network 2. A pushbutton tone detection identification device 32 in the device 3 detects the signal to send a 4-bit data representing the identification of pushbutton tone. A sound volume amplification/attenuation controller 33, when the 4-bit data represents a pushbutton tone corresponding to the sound volume amplification command or sound volume attenuation command, gives a command to change the amplification or attenuation to the device 34.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sound ffi adjustment method in an audio storage device.

When talking to a person in charge of a ship, if the level of the audio signal from the other party is not appropriate, you can tell the other party to that effect and have the other party adjust the volume. When exchanging audio signals with a machine, special means must be prepared in advance to adjust the level of the audio signal from the other party during the call.

Furthermore, the level of the voice recorded in the voice storage device varies not only by the volume generated by the recorder, but also by the amplification and attenuation distribution in the telephone network between the recorder and the voice storage device. Therefore, when retrieving a voice message from a voice storage device,
If the amplification and attenuation distribution between the listener and the audio storage device differs from the amplification and attenuation distribution at the time of recording the message, an appropriate listening volume may not be obtained.

For the above reasons, when retrieving voice messages from the voice storage device, a special listening volume adjustment means is required. Conventionally, the listening volume adjustment means has been used on the telephone of the deaf person or the corresponding subscriber circuit (hereinafter referred to as Both devices are collectively referred to as a terminal). Sound m on the terminal side
When an adjustment means is provided, it is necessary to provide a volume adjustment means for all the terminals used to retrieve voice messages from the voice storage device, which has the disadvantage of increasing the overall cost because the number of such means increases. .

In addition, when listening to voice messages stored in a voice storage device from outside or from a public telephone, it is generally assumed that the terminal used at that time does not have a means for adjusting the volume, and the voice messages obtained from the voice storage device are It is difficult to adjust the volume of the signal.

The present invention provides a volume adjustment method that makes it possible to economically realize the adjustment of the listening sound by centrally providing the means necessary for adjusting the listening sound lWA in the audio storage device. The purpose is to

1. The volume adjustment method according to the present invention is a volume adjustment method for an audio storage device that is connected to a telephone exchange and stores and retrieves audio signals, and its features are as follows: means for detecting and identifying a push-button tone generated by a subscriber in the subscriber; amplifying and attenuating means for amplifying and attenuating a voice signal to said subscriber derived from a voice storage device; and a push-button tone. and control means for controlling the amplification and attenuation means based on the detection and identification results to amplify the audio signal to the subscriber by a predetermined amount in response to a pushbutton tone corresponding to a predetermined volume adjustment instruction. , the attenuation is controlled.

Example Next, the present invention will be explained with reference to the drawings.

FIG. 1 shows an embodiment of the present invention. Audio storage device! (V
SF) 3 and a button telephone (PB) 11 are connected via a digital switching network (DSN) 2, and the subscriber 10 uses the button telephone 11 to receive voice messages from the voice storage device 3. I'm taking it out and listening.

While the subscriber 10 and the voice storage device W3 are talking, the digital voice signal output from the voice storage device 3 is transmitted to the voice decoder (DEC>13) through the digital switching network 2, where it is converted into an analog signal. Rear hybrid transformer (HT) 12. The voice is transmitted to the subscriber 10 via the button telephone Tl511.

On the other hand, the push-button tone generated by the subscriber 10 operating the push-button telephone 1111 passes through the HT 12 and reaches the voice encoder (COD) 14, where it is converted into digital data and stored as voice through the digital switching network 2. [
3 as a digital signal.

In addition, a push-button tone detection and discriminator (PBTO) 32 in the voice storage device 3 extracts the input digital signal to the voice storage device @3, converts it to analog, and converts the converted analog signal into a push-button tone. We are constantly monitoring to see if it matches. When an analog signal matching one of the push-button tones is detected, the volume amplification/attenuation controller (VIDC) 33 is notified of the detection of the push-button tone, and at the same time, the push-button tone as shown in FIG. Sends 4-bit data representing identification.

The digital volume amplification/attenuation device (DVID) 34 is a means for amplifying and attenuating the digital audio signal read out from the digital audio storage device (DVS port) 31 in units of 3 dB while remaining digital. The audio signal is amplified or attenuated according to instructions from the controller 33. When the scale amplification/attenuation controller 33 receives notification of the detection of a pushbutton tone from the pushbutton tone detection and discriminator 32, it examines the 4-bit data presented by the pushbutton tone detection and discriminator 32, and issues a volume amplification instruction or a volume attenuation. If it is a push button tone associated with an instruction, the digital tone amplification/attenuation unit 34 is instructed to change the amplification amount or attenuation amount from the current amount by 3 dB in the amplification direction or the attenuation direction.

Now, consider a case where subscriber 10 feels that the level of the voice message he is listening to is low and presses a button associated with a volume amplification instruction.

As described above, this push button tone is input to the voice storage device 3 as a digital signal via the push button telephone 11 - HT1 2 - code signal 14 - digital switching network 2. This pushbutton tone is detected and identified by a pushbutton tone detection and discriminator 32, and data representing the type of pushbutton tone is passed to a digital volume amplification/attenuation controller 33.

[Sound] When the amplification/attenuation controller 33 recognizes that the push button tone is a push button tone associated with a volume amplification instruction, it instructs the digital volume amplification/attenuation unit 34 to increase the amplification amount by 3 dB. do.

The initial value of the amplification amount of the digital volume amplification/attenuation device 34 is O
d8, that is, digital volume amplification/
Assuming that the attenuator 34 performs neither amplification nor attenuation, the digital audio signal read out from the digital audio storage device 31 in response to this instruction is amplified by 3 dB as a digital signal by the digital volume amplification/attenuation device 34 and sent to the digital switching network 2. will be sent to As mentioned above, the 3 dB amplified voice signal is sent to the button telephone 11 via the digital exchange network 2 - decoder 13 - HTl 2.
and is heard by the subscriber 10 as 3d3 amplified audio.

Subscriber 10 wants to lower the volume of the message he is listening to.
When the button associated with the volume attenuation instruction is pressed, the same procedure is followed, and the subscriber 10 lowers the volume to 3.
It is possible to listen to messages reduced in dB.

Effects of the Invention According to the present invention, in an audio storage and exchange network, by centrally providing the means necessary for adjusting the listening volume in the audio storage device, the adjustment of the listening volume can be realized economically. Furthermore, since any type of telephone can be used to listen to messages as long as it can generate push-button tones, there is also the advantage that the listening volume can be adjusted even when going out or picking up messages from a public phone.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention, and FIG. 2 is a diagram showing an example of the correspondence between types of push button tones and data obtained when detecting and identifying push button tones. Explanation of symbols of main parts 2...Digital switching network 3...Audio storage device 10...Subscriber

Claims (1)

[Claims] A method for adjusting the volume of a voice storage device connected to a telephone exchange for storing and retrieving voice signals, the method comprising means for detecting and identifying push-button tones generated by a subscriber who is talking to the voice storage device; an amplification and attenuation means for performing amplification and attenuation processing on the voice signal to the subscriber derived from the voice storage device; and the push button tone detection;
control means for controlling the amplification and attenuation means based on the identification result, amplifying the audio signal to the subscriber by a predetermined amount in response to a push button tone corresponding to a predetermined volume adjustment instruction; A volume adjustment method characterized by attenuation control.