JPH0619240Y2 - Voice conversion device with recording function for telephones - Google Patents

Description

TECHNICAL FIELD The present invention relates to a voice conversion device with a recording function for a telephone which is used together with a telephone to change the pitch of voice or prerecorded voice.

2. Description of the Related Art Conventionally, a device that can be used together with a telephone of a general household and electrically processes a voice signal to produce a voice different from the original voice of a speaker or a prerecorded voice has been developed and put into practical use. Not.

However, a device, such as an answering machine, which transmits a prerecorded voice to the other party who is making a call as it is has been put to practical use.

Problems to be Solved by the Invention When a general household is invited to purchase goods, etc. by telephone, and the respondent is a woman, the solicitor does not force the solicitation as if the opponent is weak. It can be said that there is none. If such a situation is expected, if there is a device that produces a voice different from the original voice of the speaker or a pre-recorded voice, it is possible to convert the responding female voice into a male voice. By telling the other party, it is possible to restrain the solicitor.

However, the conventional voice conversion device has a complicated circuit configuration because it performs voice frequency analysis and waveform analysis / synthesis.
Not only does the shape increase, but it also has the drawback of being expensive. Therefore, it can be said that it is practically difficult to mount such a device on a home telephone.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a voice conversion device with a recording function for a telephone which is small in size, can be easily used with a telephone, and is inexpensive.

In order to solve the above problems, the present invention provides a microphone, a first amplifier connected to the microphone, an audio memory and a processor connected to the amplifier, and a processor. A voice conversion device with a recording function for a telephone, comprising: a second amplifier, a voice signal memory, and a microcomputer connected to the second amplifier; and a speaker connected to the second amplifier, wherein the processor outputs a first voice signal output from the first amplifier. 1 audio signal or a second audio signal output from the audio memory is provided with a sampling circuit, an A / D converter, an audio signal processing circuit and a D / A converter, and the sampling circuit obtains by sampling the audio signal. Each of the divided audio signals of the separable wavelength of the divided audio signal is sampled twice by the audio signal processing circuit and synthesized. To produce a first converted audio signal having a frequency that is ½ of the frequency of the first or second audio signal, and a specific one of the divided audio signals of the above-mentioned wavelengths is used twice or more For each two times, or for a specific one of the divided audio signals of the separated wavelengths once and for another two times, and synthesizes the first converted audio signal to the first or second one. So that the pitch can be adjusted up or down with reference to the frequency of 1/2 of the audio signal of 1., and the sampling circuit obtains a division obtained by sampling one wavelength of the first or second audio signal. The audio signal processing circuit collects every other audio signal and synthesizes the audio signals to generate a second converted audio signal of two wavelengths for all wavelengths of the first or second audio signal. First or second
A second converted voice signal having a frequency twice the frequency of the voice signal is collected, and the divided voice signals are sampled every other two or two or more at a time, and synthesized. Alternatively, while collecting every other divided audio signal and collecting not only every other divided audio signal but also combining each divided audio signal, the second converted audio signal may be the first or the second converted audio signal. The pitch can be adjusted above or below the frequency of twice the frequency of the audio signal, and the audio output of the speaker by the converted audio signal amplified by the second amplifier is input to the transmitter of the telephone. I am trying.

The divided audio signal obtained by sampling the first audio signal output from the microphone and amplified by the first amplifier or the second audio signal output by the audio memory by the sampling circuit is a digital value by the A / D converter. And is recorded in the audio signal memory. The audio signal processing circuit collects the divided audio signals of the separable wavelengths of the divided audio signal recorded in the audio signal memory twice and synthesizes them, respectively, thereby halving the frequency of the audio signal. Create a first converted audio signal having.

In addition, a specific one of the divided wavelength split audio signals is sampled twice or more other times twice, or a specific one of the divided wavelength split audio signals is sampled once or the other one twice. By synthesizing the two, the pitch of the first converted audio signal is adjusted below or above the frequency of 1/2 of the first or second audio signal as a reference.

Further, the first of the audio signals amplified by the first amplifier is
Every other divided audio signal obtained by sampling the wavelength by the sampling circuit is sampled and combined to form a second converted audio signal of two wavelengths, which is used for all wavelengths of the first or second audio signal. To produce a second converted audio signal having a frequency twice that of the first or second audio signal.

In addition, while collecting the divided audio signals every other, appropriately collecting two or more at a time and performing synthesis, or collecting the divided audio signals every other, not every other suitable. By collecting and synthesizing the respective divided audio signals, the pitch of the second converted audio signal is adjusted above or below the frequency double the frequency of the first or second audio signal.

The converted voice signal is converted into an analog value by the D / A converter, amplified by the second amplifier, and further input to the speaker, and the voice output from the speaker enters the transmitter of the telephone.

Embodiment FIG. 1 is a block diagram of an embodiment of the present invention,
2 and 3 are explanatory views showing the principle of doubling or halving the frequency of the first or second audio signal, and FIG. 2 (a) shows FIG. 2 (b) shows how to make a first converted voice signal of 1 wavelength, and FIG. 2 (c) shows a second conversion of 1 wavelength. Figure 3 (a) shows the first method of making audio signals.
Alternatively, the continuous waveform of the second audio signal is shown in FIG.
3 (c) shows the continuous waveform of the converted audio signal of FIG. 3, and FIG. 3 (c) shows the continuous waveform of the second converted audio signal.

The voice conversion device with a recording function of the telephone of the present embodiment includes a microphone 11 and a first microphone connected to the microphone 11.
Amplifier 12 and processor 20 connected to this amplifier
A second amplifier 51 connected to the processor 20, an audio signal memory 30 and a microcomputer 40, and a speaker 52 connected to the second amplifier 51.

The processor 20 includes a sampling circuit 21, an A / D converter 22 connected to the sampling circuit 21, an audio signal processing circuit 23, and a D / A converter 24 connected to the audio signal processing circuit 23.
The audio signal memory 30 is connected to the A / D converter 22, and the audio signal processing circuit 23 is connected to the audio signal memory 30.

Microcomputer 40, sampling circuit 21, A / D converter 2
2. The audio signal processing circuit 23, the D / A converter 24 and the audio signal memory 30 are connected by signal lines 41, 42, 43, 44 and 55, respectively. A voice changeover switch 45 having changeover contacts 45a and 45b is connected to the microcomputer 40, and the output side of the first amplifier 12 and the second amplifier are connected.
A voice conversion switch 46 having switching contacts 46a and 46b is connected between the input sides of 51. Reference numeral 49 is a pitch adjustment switch for adjusting the pitch of the converted audio signal. 60 is a telephone transmitter, and the speaker 52 is the transmitter 60
Will be installed near

A switching contact 48 is provided between the first amplifier 12 and the audio memory 31.
A recording switch 48 having a and 48b is connected,
A selection switch 47 having a switching contact 47a connected to the first amplifier 12 and a switching contact 47b connected to the audio memory 31 is connected between the first amplifier 12, the audio memory 31 and the processor 20. ing.

Note that Va, Vb, and Vc are respectively the first audio signal output by the first amplifier 12 or the second audio signal output by the audio memory 31.
The audio signal (hereinafter, simply referred to as the audio signal Va), the first converted audio signal, and the second converted audio signal are shown. The first converted audio signal is a converted audio signal having a frequency that is approximately ½ of the frequency of the audio signal Va and a frequency that is approximately twice the frequency of the audio signal Va of the second converted audio signal.

Next, the operation of this embodiment will be described.

When the speaker makes a voice toward the microphone 11 with the recording switch 48 on the side of the switching contact 48b, the voice of the speaker is recorded in the voice memory 31. Switch the recording switch 48
On the 48a side, the voice of the speaker cannot be recorded.

When the selection switch 47 is set to the switching contact 47a side, the first voice signal is directly or converted and sent to the transmitter 60. When the selection switch 47 is set to the switching contact 47b side, the second voice signal is directly or converted and sent to the transmitter 60.

When the voice conversion switch 46 is set to the switching contact 46b side,
Since the output side of the first amplifier 12 and the input side of the second amplifier 51 are directly connected and the processor 20 is bypassed, the first or second audio signal is converted into the first audio signal without being converted.
Via the amplifier 12 and the second amplifier 51 of the speaker 52, and enters the speaker 52, and the voice output from the speaker 52 is transmitted to the transmitter 60 of the telephone.

Regarding the conversion operation of the audio signal, set the audio conversion switch 46 to the switching contact 46a side and set the audio conversion switch 45 to the switching contact 45a.
The description will be made from the case of setting to the side of, that is, the case of converting a voice signal of a speaker or a prerecorded voice signal into a voice signal having a frequency of ½. In this case, the selection switch 47 is changed over to the switching contact 47a
The first audio signal is input to the sampling circuit 21 of the processor 20 when the switch contact 47b is selected, and the second audio signal is input to the sampling circuit 21 of the processor 20 when the switch contact 47b is selected.

The sampling circuit 21 receives the clock signal 41a from the microcomputer 40 through the signal line 41 and samples all the wavelengths of the audio signal Va at the frequency of the clock signal 41a.

FIG. 2 (a) shows the above-described sampling method and shows a waveform of one wavelength of the audio signal Va (for convenience of explanation, only a waveform of one wavelength is shown and described).
The audio signal Va is sampled according to the frequency of the clock signal 41a, and is, for example, V1, V2, V3 ,.
3, sampling values such as V24, that is, divided audio signals are obtained. The number of samplings 24 for one wavelength is a numerical value adopted for convenience of description, and is not limited to this 24, and the clock signal 41 is selected according to the number of samplings.
The frequency of a is selected. Each of the divided audio signals obtained by sampling in this way is sequentially converted from an analog value to a digital value by the A / D converter 22, and then recorded at a predetermined address of the audio signal memory 30 by a command of the microcomputer 40. It

Then, the audio signal processing circuit 23, in response to a command from the microcomputer 40, outputs the divided audio signals of the separable wavelength of the divided audio signals recorded in the audio signal memory 30 twice each, as shown in FIG. That is, V0, V0, V1, V1, V2, V2, V3, V3 ...
... V23, V23, V24, and V24 are sampled, combined, and then converted into an analog value by the D / A converter 24 to become the first converted audio signal Vb shown in FIG. 2 (b). Note that all wavelengths of the audio signal Va are sampled as described above. Then, the divided audio signals of W1 and W2 in FIG. 3 (a) are sampled and synthesized as described above (the divided audio signals of W3 and W4 are not used) and W1 and W2 of FIG. 3 (b) are combined. Then, the divided audio signals of W5 and W6 in FIG. 3 (a) are sampled and synthesized as described above (the divided audio signals of W7 and W8 are not used) and W5 of FIG. 3 (b). Make W6. A continuous waveform of the first converted audio signal Vb obtained by sequentially repeating such sampling and synthesis is as shown in FIG. 3 (b).

Therefore, the wavelength of the first converted audio signal Vb is twice the wavelength of the audio signal Va before being sampled. That is, it indicates that the frequency of the first converted voice signal Vb is 1/2 of the frequency of the voice signal Va, in other words, the voice of the speaker.

The first converted voice signal Vb is amplified by the second amplifier 51 and input to the speaker 52, and the voice output from the speaker 52 enters the transmitter 60 of the telephone. Therefore, the speaker
The pitch of the voice signal output from 52 is 1 from the pitch of the speaker's voice.
Octave is lowered, so a woman is using a microphone 11
When the voice that is spoken to is emitted from the speaker 52 and transmitted to the other party through the transmitter 60 of the telephone, it sounds like a male voice.

The above has described the principle of making the first converted audio signal having a frequency of exactly 1/2 of the audio signal Va, but in practice
The pitch can be adjusted within a predetermined range above and below the frequency of / 2.

That is, by operating the pitch adjusting switch 49, the audio signal processing circuit 23, instead of sampling the divided audio signals twice each as described above, for example, V0, V0, V1, V1, V1
2, V2, V3, V3, V3, V4, V4, V5, V5, V6, V6, V7, V
7, V7, V8, V8, ... A specific divided audio signal (in this case, one divided audio signal for every four) is transmitted twice or more (three times in this case), and other divided audio signals are duplicated. When collected once and synthesized as described above, the frequency of the first converted audio signal becomes a frequency slightly lower than twice the frequency of the audio signal Va.

Alternatively, instead of collecting each of the divided audio signals twice, for example, V0, V0, V1, V1, V2, V2, V3, V
3, V4, V5, V5, V6, V6, V7, V7, V8, V8, V9, V10, V1
0, V11, V11 ... A specific divided audio signal (in this case, one divided audio signal in five) is sampled once and the other divided audio signals are sampled twice, and synthesized as described above, First
The frequency of the converted audio signal is 1/2 the frequency of the audio signal Va.
It becomes a little higher frequency.

Next, the case where the voice conversion switch 45 is set to the side of the switching contact 45b while the voice conversion switch 46 is set to the side of the switching contact 46a, that is, the case of converting to the voice signal having the frequency twice the frequency of the voice signal Va will be described. To do.

Also in this case, the divided audio signal obtained by sampling all the wavelengths is recorded in a predetermined address of the audio signal memory 30.

Next, the audio signal processing circuit 23, in response to a command from the microcomputer 40, samples every other divided audio signal within one wavelength of the audio signal Va as shown in FIG. 2 (c). That is, V0, V2, V
4, ... V22, V24 are sampled and combined, and then converted into an analog value by the D / A converter 24 to form one wavelength of the second converted audio signal Vc. This in turn 2
By repeating this twice, the second converted audio signal Vc of two wavelengths is created. This operation is performed for all wavelengths of the audio signal Va.
That is, W1 which is one wavelength of the audio signal Va shown in FIG.
W1 and W2 shown in FIG. 3 (c) are created from the divided audio signals of W1 and W2, and then W1 'and W2' which are the same as W1 and W2 are created. Similarly, from the divided audio signals of W3 and W4 in FIG.
Make W3, W4, W3 ', W4' in Figure (c). Such collection
The continuous waveform of the second converted voice signal Vc obtained by sequentially repeating the synthesis is as shown in FIG. 3 (c).

Therefore, the second converted audio signal Vc has half the wavelength and twice the frequency of the audio signal Va before being sampled. The second converted voice signal Vc is amplified by the second amplifier 51 and input to the speaker 52, and the voice signal output from the speaker 52 enters the transmitter 60 of the telephone. That is, the pitch of the voice that is emitted from the speaker 52 and transmitted to the communication partner through the transmitter 60 of the telephone is one octave higher than the voice of the speaker.

The above has described the principle of producing the second converted audio signal having a frequency twice that of the audio signal Va, but in practice, the pitch can be adjusted within a predetermined range above and below the frequency doubled. .

That is, by operating the pitch adjustment switch 49, the audio signal processing circuit 23, instead of sampling every other divided audio signal as described above, for example, V0, V2, V4, V7, V9, V1
1, V14, V16, ... While sampling every other divided audio signal every two or more every two or more (in this case, every other three samplings and then skipping two). , And then every other sample is taken again.) When synthesized as described above, the frequency of the second converted audio signal becomes a frequency slightly higher than twice the frequency of the audio signal Va.

Alternatively, instead of sampling every other divided audio signal, for example, V0, V2, V4, V6, V7, V9, V11, V13, V1
5, V16, V18, ... While sampling every other audio signal, instead of sampling every other audio signal separately (in this case, repeating every other sampling four times, If the combination is performed as described above, the frequency of the second converted audio signal becomes a frequency slightly lower than twice the frequency of the audio signal Va.

The first amplifier 12, the sampling circuit 21, the A / D converter 22, and the audio signal processing circuit 2 shown in the above embodiments
3, D / A converter 24, audio signal memory 30, microcomputer 4
The 0 and the second amplifier 51 are all available in the form of an IC, and also have a microphone 11 and a speaker 52.
Since a small-sized voice conversion device is available, the voice conversion device with a recording function for a telephone of this embodiment, which is an assembly of these, can also be easily downsized.

Effect of the Invention As described above, the voice conversion device with a recording function of the present invention lowers the frequency of the voice of the speaker or the voice recorded in advance by about one octave, that is, the voice of a woman is similar to that of a man. Since the voice can be transmitted to the other party as a voice, by using this voice conversion device with a recording function for a telephone together with a telephone, it is possible for a woman to restrain and respond to a person who unfairly solicits sales of goods by telephone. There is.

The frequency of the voice signal of the speaker or prerecorded can be approximately doubled, so that the voice having a frequency approximately twice the frequency of the voice of the speaker is transmitted to the other party. There is also an advantage that can be done.

Further, since the components of the voice conversion device with a recording function for a telephone of this embodiment can be integrated into an IC, the voice conversion device with a recording function for a telephone can be downsized, and frequency analysis and waveform analysis are different from the conventional ones.・ Since the frequency of the speaker's voice can be doubled or halved without synthesizing, it is a compact and inexpensive voice converter with a recording function for telephones. There is an advantage that can be.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention,
2 and 3 are explanatory views showing the principle of doubling or halving the frequency of the audio signal. 11 ... Microphone, 12 ... First amplifier, 20 ... Processor, 21 ... Sampling circuit, 22 ... A / D converter, 23 ... Voice signal processing circuit, 24 ... D / A converter, 30 ... … Voice signal memory, 40 …… Microcomputer, 45 ……
Voice selector switch, 46 ... Voice conversion switch, 47 ... Selection switch, 48 ... Recording switch, 49 ... Pitch adjustment switch, 51 ... Second amplifier, 52 ... Speaker, 60 ...
Microphone.

Claims (1)

[Scope of utility model registration request] 1. A microphone, a first amplifier connected to the microphone, an audio memory and a processor connected to the amplifier, and a second amplifier, an audio signal memory and a microcomputer connected to the processor,
A voice conversion device with a recording function for a telephone, comprising a speaker connected to a second amplifier, wherein the processor comprises a first voice signal output by the first amplifier or a second voice signal output by a voice memory. Sampling circuit, A /
The audio signal processing circuit comprises a D converter, an audio signal processing circuit, and a D / A converter, and the audio signal processing circuit outputs each of the divided audio signals of the inner wavelength of the divided audio signal obtained by sampling the audio signal by the sampling circuit. A first converted audio signal having a frequency that is ½ of the frequency of the first or second audio signal is created by sampling and synthesizing each two times, and a specific converted audio signal of the separated wavelength signals of the separated wavelengths is generated. The first converted speech is obtained by sampling one or more times twice for other things, or once for a particular one of the divided audio signals of the above-mentioned separated wavelengths, and for synthesizing another one twice. The signal is such that the pitch can be adjusted above or below the frequency of 1/2 of the first or second audio signal as a reference, and the sampling circuit further comprises the first or second audio signal. The divided audio signals obtained by sampling one wavelength are sampled by the audio signal processing circuit every other one and combined to create a second converted audio signal of two wavelengths. To produce a second converted audio signal having a frequency twice the frequency of the first or second audio signal, and to collect the divided audio signals every other two times as appropriate. By collecting one or two or more at a time and performing synthesis, or while collecting every other divided audio signal, by collecting not only every other divided audio signal but synthesizing,
The second converted audio signal is adjustable in pitch above or below the frequency double that of the first or second audio signal, and is amplified by a second amplifier. A voice conversion device with a recording function for a telephone, characterized in that the voice output of a speaker by a voice signal is put into a transmitter of a telephone.