JPH04290049A - Guidance voice generating method - Google Patents

Abstract

PURPOSE:To generate a guidance voice without receiving erroneously as a push-button dial signal. CONSTITUTION:A voice for guidance vocalized from a talker is converted to an audio signal by a microphone M. After a push-button dial signal component in the audio signal is eliminated by a band elimination filter BEF, it is recorded on a recorder REC. The guidance voice can be generated not including the push-button dial signal component by generating the guidance voice by editing the reproducing audio signal of the recorder REC.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for creating a guidance voice for use in a system in which a user inputs push-button dial signals in accordance with voice guidance to control a service.

0002

[Prior Art] Conventionally, push button dial signal type telephones (hereinafter referred to as "P"
A system for controlling a service by inputting a push-button dial signal (hereinafter referred to as a "PB signal") using a "PB telephone" is configured as shown in FIG. 4, for example.

In FIG. 4, VG is a guidance voice reproducing and transmitting circuit (voice guidance), and PBR is a user SUB.
The PB signal receiving circuit HYB is a 2W-4W conversion circuit that receives the PB signal input from the guidance voice reproducing and transmitting circuit VG, and sends the guidance voice reproduced and transmitted only to the user SUB (A in Figure 4). root), user S
This circuit sends the PB signal input by UB to the PB signal receiving circuit PBR (route B in FIG. 4).

FIG. 5 is an explanatory diagram showing a method of creating a guidance voice used in the guidance voice reproducing and transmitting circuit VG of FIG. In Figure 5, M is a microphone, REC
is a recording device such as a tape recorder, and records the voice uttered by the speaker. Further, REREC is a recording/playback device such as a tape recorder, and the recording device REC is
Play the recorded audio. DIGI is an audio data creation device (digitizer) that edits the reproduced audio, such as deleting silent sections before and after utterance, and creates audio data that matches the synthesis method of the guidance audio reproducing and transmitting circuit VG shown in Fig. 4. .

In FIG. 4, the guidance voice reproduced and transmitted by the guidance voice reproduction and transmission circuit VG is sent to the user SUB via the route A, and the PB signal input by the user SUB according to the guidance voice is transmitted to the PB via the route B. The contents of the PB signal sent to the signal receiving circuit PBR are decoded by the PB signal receiving circuit PBR. At this time, 2W-4W in Figure 4
Since the conversion circuit HYB is not ideal in the normally realized circuit configuration, the guidance voice reproduced and transmitted by the guidance voice reproducing and transmitting circuit VG is inputted to the PB signal receiving circuit PBR through the route C. However, this guidance voice was sometimes mistakenly received as a PB signal.

[0006] In order to avoid this erroneous reception, the following method has conventionally been adopted. (1) Input of PB signal is prohibited while guidance audio is being sent. (2) Use only PB signals with few erroneous receptions as input PB signals. In other words, conduct a PB signal erroneous reception test for voice guidance in advance, and use PB signals in which voice guidance is erroneously received as a PB signal to control the service. do not use.

(3) Lower the output level of the guidance voice.

[0008]

[Problems to be Solved by the Invention] However, in the guidance voice transmission method having the above configuration, there is a problem that the method (1) has poor serviceability for users who are accustomed to input operations, and the method (2) The problem with method (3) is that the degree of freedom of the service as a system is restricted, and the problem with method (3) is that it is difficult for users with large subscriber losses to hear the guidance voice. It wasn't satisfying.

The present invention solves the above-mentioned conventional problems and provides P
It is an object of the present invention to provide a method for creating a guidance voice that will not be erroneously received as a B signal.

0010

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides a method for creating a guidance voice used in a system in which a user inputs a PB signal according to voice guidance to control a service. The guidance voice generating audio signal is configured to pass through a band elimination filter that removes at least part of the frequency components corresponding to the frequencies constituting the PB signal.

[0011]

[Function] According to the present invention, since the method for creating a guidance voice is configured as described above, when recording an audio signal for creating a guidance voice obtained from a microphone, etc., the band elimination filter eliminates the noise contained in the audio signal. Remove the PB signal component or play the recorded guidance voice,
When editing and creating audio data, a band elimination filter removes the PB signal component included in the guidance audio.

0012

Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. (First Embodiment) FIG. 1 is an explanatory diagram showing a guidance voice creation method according to the first embodiment of the present invention. In the figure, M is a microphone, REC is a recording device such as a tape recorder, and BEF is a band It is a removal filter.

The characteristics of the band-elimination filter BEF are shown below. First, the input impedance of the band-rejection filter BEF is the same as the output impedance of the microphone M, and the output impedance is the same as the input impedance of the recorder REC. Assuming that the PB signal uses a signal specified by the terminal equipment regulations, the low group frequency is 6.
97HZ, 770HZ, 852HZ, 941Z
, and the high group frequencies are 1209Hz and 1336Hz
, 1477HZ, 1633HZ. And P
The B signal is composed of a combination of one frequency among the low group frequencies and one frequency among the high group frequencies.

Here, the PB signal receiving circuit P in FIG.
Assuming that Oki Electric's MSM6945RS is used for BR, the reception characteristics of the MSM6945RS are as follows: the frequency insensitive band is a minimum of 3.8% at low group frequencies, and a minimum of 3.8% at high group frequencies.
．． 6%, and the input signal imperceptible level is a maximum of -56 dBm per frequency. Band-rejection filter B in this case
Figure 2 shows the frequency gain characteristics of the EF.

In FIG. 2, fL1l =697×0.
962=670(Hz), fL1h=697×1.0
38=724 (Hz). Similarly, fL2l
=740, fL2h =780, fL3l =819,
fL3h =885, fL4l =905, fL4h
=977. Also, in FIG. 2, fH1l = 1
209×0.964=1165(Hz), fH1h=
1209×1.036=1253 (Hz). Similarly, fH2l = 1287, fH2h = 1384
, fH3l = 1423, fH3h = 1530, fH
4l = 1574, fH4h = 1692.

Next, the operation of the guidance voice creation method according to the embodiment of the present invention will be explained. In FIG. 1, the audio signal for guidance audio creation, which is the output of the microphone M, is filtered by a band elimination filter BEF to remove the PB included in the audio signal.
The signal components are removed and recorded by a recorder REC. Since the recorded voice does not include a PB signal component, even if it is used as a guidance voice in a system such as that shown in FIG. 4, it will not be erroneously received as a PB signal. (Second Embodiment) FIG. 3 is an explanatory diagram showing a method for creating guidance audio according to the second embodiment of the present invention, where REREC is a recording/playback device such as a tape recorder, and DIGI is a recording/reproducing device such as a tape recorder, and DIGI edits the reproduced audio and converts the audio data. The device to create, BEF, is a band-reject filter.

The characteristics of the band rejection filter BEF are that the input impedance is the same as the output impedance of the recording/playback device REREC, the output impedance is the same as the input impedance of the audio data creation device DIGI,
The frequency gain characteristics are the same as in the first embodiment (FIG. 2). Next, the operation of the guidance voice creation method according to the second embodiment of the present invention will be explained.

In FIG. 3, the guidance voice creation audio signal reproduced by the recording and playback device REREC has the PB signal component contained in the guidance voice signal removed by the band elimination filter BEF, and is then sent to the audio data creation device DIG.
The data is input to I and converted into audio data. Since the converted audio data does not include the PB signal component, it is shown in Figure 4.
Even if it is used as a guidance voice in a system such as the above, it will not be erroneously received as a PB signal.

In the above embodiments, the frequency gain characteristic of the band-rejection filter removes all frequency components constituting the PB signal, but the same result can be achieved even if only the PB signal component included in the guidance voice is removed. effective. Further, since the PB signal is composed of a combination of two frequencies, one component of the low group frequency and one component of the high group frequency, the same effect can be obtained even if only one of the low group frequency or the high group frequency is removed.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and various modifications can be made based on the spirit of the present invention, and these are not excluded from the scope of the present invention.

[0021]

As described above in detail, according to the present invention, the audio signal for creating guidance audio is passed through a band elimination filter that removes at least a part of the frequency components corresponding to the frequencies constituting the PB signal. , it is possible to create guidance audio that does not include the PB signal component. Therefore, even if the guidance voice created according to the present invention is used in the system shown in FIG. 4, it will not be erroneously received as a PB signal.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing a guidance voice creation method according to an embodiment of the present invention.

FIG. 2 is a characteristic diagram of a band-rejection filter used in the guidance voice creation method according to the embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a guidance voice creation method according to a second embodiment of the present invention.

FIG. 4 is a configuration diagram of a conventional system that controls services by inputting a PB signal.

FIG. 5 is an explanatory diagram showing a conventional guidance voice creation method.

[Explanation of symbols]

VG Guidance audio reproduction transmission circuit PB
R PB signal receiving circuit SUB User HYB 2W-4W conversion circuit M
Microphone REC Recording device REREC Recording/playback device DIGI Audio data creation device BEF Band removal filter

Claims (1)

[Claims] Claim 1. A method for creating a guidance voice used in a system for controlling a service in which a user inputs a push-button dial signal in accordance with voice guidance, wherein the push-button dial signal includes an audio signal for creating the guidance voice. 1. A guidance voice creation method comprising passing a frequency through a band elimination filter that removes at least a part of a frequency component corresponding to the frequency.