JPH0628845Y2 - Telephone with built-in voice converter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to a telephone with a built-in voice conversion device capable of changing the pitch of a speaker's voice and transmitting it to the other party.

2. Description of the Related Art Conventionally, a telephone with a built-in voice conversion device has not been developed and put into practical use for general household use, in which a voice signal is electrically processed and transmitted to a party different from the original voice of the speaker.

Problems to be solved by the invention When a general household is solicited to purchase goods, etc. by telephone and the respondent is a woman, the solicitor does not make a forcible solicitation as if the opponent is weak. It can be said that there is none. When this is expected, if there is a telephone that produces a voice different from the original voice of the speaker,
It is possible to restrain the solicitor by converting the voice of the responding woman like a man and letting the other party hear it.

However, in order to make the telephone do such a thing, it is necessary to attach a voice converter, but the conventional voice converter performs frequency analysis of voice and analysis / synthesis of waveforms, so that the circuit configuration is complicated. In addition to the large size, it has the drawback of being expensive. Therefore, installing such a device in a general household telephone is
It can be said that it is difficult as a practical problem.

The present invention has been made in view of the above, and an object thereof is to provide a small-sized and inexpensive telephone with a built-in voice conversion device.

Means for Solving the Problems To solve the above problems, the present invention provides a microphone, a first amplifier connected to the microphone, a processor connected to the amplifier, and a processor connected to the processor. An audio conversion device comprising a second amplifier, an audio signal memory and a microcomputer, wherein the processor comprises an audio signal sampling circuit, an A / D converter, an audio signal processing circuit and a D / A converter, The audio signal processing circuit extracts and combines each of the divided audio signals of the separable wavelength of the divided audio signal obtained by sampling the audio signal by the circuit twice to synthesize 1 / Making a first converted audio signal having a frequency of 2 and selecting a specific one of the separated audio signals of the above-mentioned alternate wavelength more than twice Is obtained twice, or a specific one of the divided audio signals of the separated wavelength is sampled once and the other is sampled twice, and the first converted audio signal is divided into
The pitch can be adjusted below or above the frequency of 2 as a reference, and the divided voice signal obtained by sampling one wavelength of the voice signal by the sampling circuit is further processed by the voice signal processing circuit. A second converted audio signal having a frequency twice the frequency of the audio signal is obtained by sampling and synthesizing every second wavelength to generate a second converted audio signal of two wavelengths for all wavelengths of the audio signal. While collecting every other divided audio signal, collect two or more at a time and synthesize them together, or collect every other divided audio signal while collecting every other one. Rather than collecting and synthesizing the respective divided audio signals, the second converted audio signal is obtained by combining the two audio signals of the audio signals.
The pitch can be adjusted above or below the doubled frequency as a reference, and the converted audio signal is amplified by the second amplifier and input to the telephone body.

Function The divided audio signal obtained by sampling the audio signal output from the microphone of the telephone set and amplified by the first amplifier by the sampling circuit is converted into a digital value by the A / D converter and 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 each time and synthesizes the divided audio signals, so that 1 / of the frequency of the audio signal is obtained.
Create a first converted audio signal having a frequency of 2.

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 voice signal is adjusted below or above the frequency of 1/2 of the voice signal as a reference.

Further, every other divided audio signal obtained by sampling one wavelength of the audio signal amplified by the first amplifier by the sampling circuit is sampled and synthesized to form a second converted audio signal of two wavelengths. By doing this for all wavelengths of the audio signal, a second converted audio signal having a frequency twice the frequency of the audio signal is created.

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 double frequency of the audio signal as a reference.

The converted voice signal is converted into an analog value by a D / A converter, and then amplified by a second amplifier and put in the telephone body.

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 audio signal.
Fig. 2 (a) shows how to sample one wavelength of the audio signal, Fig. 2 (b) shows how to make the first converted audio signal of one wavelength, and Fig. 2 (c) shows the second of one wavelength. 3 (a) shows the continuous waveform of the audio signal, FIG. 3 (b) shows the continuous waveform of the first converted audio signal, and FIG. 3 (c) shows the continuous waveform of the converted audio signal. The continuous waveforms of the converted audio signal are shown respectively.

The telephone with a built-in voice conversion device of this embodiment is provided with a microphone 11 provided in a handset 10 of the telephone, a first amplifier 12 connected to the microphone 11, a processor 20 connected to the amplifier, and this processor. It comprises a second amplifier 51 connected to 20, a voice signal memory 30 and a microcomputer 40. The telephone main body 70 is 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 51 are connected.
A voice changeover switch 46 having changeover contacts 46a and 46b is connected between the input sides of. Reference numeral 49 is a pitch adjustment switch for adjusting the pitch of the converted audio signal.

Note that Va, Vb, and Vc respectively represent an audio signal before being sampled (hereinafter simply referred to as a converted audio signal Va), a first converted audio signal, and a second converted audio signal. The first converted audio signal and the second converted audio signal are converted audio signals each having a frequency that is approximately 1/2 or approximately twice the frequency of the converted audio signal Va.

Next, the operation of this embodiment will be described.

When the voice 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 to bypass the processor 20, the voice signal generated by the voice of the speaker received by the microphone 11 is not converted and It enters the telephone main body 70 through the first amplifier 12 and the second amplifier 51 and is transmitted to the other party.

Regarding the conversion operation of the voice signal, set the voice changeover switch 46 to the side of the changeover contact 46a and set the voice changeover switch 45 to the changeover contact 45a.
The description will be made from the case of setting to the side of, that is, the case of converting the voice of the speaker into the voice signal of the frequency of 1/2.

The speaker's voice enters microphone 11 and
The audio signal Va output from 11 and amplified by the first amplifier 12 is
It is input to the sampling circuit 21. Sampling circuit 21
Is a clock signal 41a from the microcomputer 40 through the signal line 41.
And receives the audio signal V at the frequency of the clock signal 41a.
Sample all wavelengths in a.

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, ... V23, V2.
A sampling value such as 4, that is, a divided audio signal is obtained. The number 24 of samplings for one wavelength is a number adopted for convenience of description, and is not limited to 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 ... V
23, V23, V24, and V24 are sampled and combined, and then converted into analog values by the D / A converter 24, and are shown in FIG. 2 (b).
Is the first converted audio signal Vb. 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. Fig. 3 Fig. 3 Fig. 3 (a), and 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).
Make W5 and W6 in (b). 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 becomes a transmission signal of the telephone body 70. Therefore, the height of the voice output transmitted to the other party is one octave lower than that of the voice of the speaker, so that the voice spoken by the woman toward the microphone 11 is transmitted to the other party via the telephone body 70. Sometimes it sounds like a male voice.

The above extends the principle of making the first converted voice signal having a frequency of exactly 1/2 of the speaker's voice, but in reality it is 1/2
The pitch can be adjusted in a predetermined range above and below the frequency of.

That is, by operating the pitch adjusting switch 49, the audio signal processing circuit 23, instead of collecting the divided audio signals twice each as described above, for example, V0, V0, V1, V1, V2, V2,
V3, V3, V3, V4, V4, V5, V5, V6, V6, V7, V7, V7, V8, V8 ...
As described above, a specific divided audio signal (in this case, one in four divided audio signals) is twice or more (three times in this case), and other divided audio signals are sampled twice and synthesized as described above. , The frequency of the first converted audio signal is slightly lower than twice the frequency of the converted audio signal Va.

Alternatively, instead of collecting each of the divided audio signals twice, for example, V0, V0, V1, V1, V2, V2, V3, V3, V4, V5,
V5, V6, V6, V7, V7, V8, V8, V9, V10, V10, V11, V11, etc., a specific divided audio signal (in this case, one divided audio signal for every five) When the other divided audio signals are sampled twice and synthesized as described above, the frequency of the first converted audio signal becomes a frequency slightly higher than half the frequency of the converted audio signal Va.

Next, when the voice conversion switch 45 is placed on the side of the switching contact 45b while the voice conversion switch 46 is placed on the side of the switching contact 46a, that is, when the voice signal having a frequency twice that of the voice of the speaker is converted. explain.

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, V4,
・ ・ ・ ・ ・ V22 and V24 are sampled and synthesized, then D /
A wavelength is converted into an analog value by the A converter 24 to generate one wavelength of the second converted audio signal Vc. This is repeated twice in sequence to create the second converted audio signal Vc of two wavelengths.
This operation is performed for all wavelengths of the audio signal Va. That is, W1 and W which are one wavelength of the audio signal Va shown in FIG. 3 (a).
From the two divided audio signals, W1 and W2 shown in FIG. 3 (c) are created, 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. 3 (a), Fig. 3 (c)
Make W3, W4, W3 ', W4'. A continuous waveform of the second converted audio signal Vc obtained by repeating the above-mentioned sampling / synthesis sequentially 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 becomes a transmission signal of the telephone body 70. Therefore, the pitch of the voice transmitted to the other party is one octave higher than the pitch of the voice of the speaker.

The above has described the principle of producing the second converted voice signal having a frequency which is exactly twice that of the speaker's voice. However, in practice, it is possible to adjust the pitch within a predetermined range above and below the double frequency. There is.

That is, the sound signal processing circuit 23 by operating the pitch adjustment switch 49, instead of sampling every other divided sound signal as described above, for example, V0, V2, V4, V7, V9, V11, V1
4, V16, ... While sampling every other divided audio signal, appropriately sample every two or more than two (in this case, sample every other three times and then skip two, then 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, V15, V16, V1
While sampling every other audio signal like 8 ..., instead of sampling every other audio signal separately (in this case, every other audio signal is sampled 4 times and then skipped without skipping. Are sampled, and then every other sample is taken.) When combined 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 a small microphone 11 is also available. Therefore, the telephone with a built-in voice conversion device of this embodiment, which is an assembly of these, can also be easily made small. Becomes possible.

Effect of the Invention As described above, the telephone with a built-in voice conversion device of the present invention lowers the frequency of the voice of the speaker by about one octave, that is, can transmit the voice of a woman to the other party as a voice like a man. Therefore, by using this telephone with a built-in voice conversion device, there is an effect that a woman can restrain and respond to a person who unreasonably solicits the sale of articles by telephone.

Since it is possible to double the frequency of the voice signal of the speaker, there is also an advantage that a voice having a frequency approximately twice that of the voice of the speaker can be transmitted to the communication partner.

Further, since the parts of the voice conversion device of this embodiment can be integrated into an IC, the voice conversion device can be downsized, and unlike the conventional case, the speaker can be processed without performing frequency analysis, waveform analysis / synthesis, or the like. Since the frequency of the voice can be doubled or reduced to about 1/2, there is an advantage that the telephone can be made compact and inexpensive.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention,
2 and 3 are explanatory diagrams showing the principle of doubling or halving the frequency of the audio signal. 10 ... Handset, 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 changeover switch, 46 ... Voice conversion switch, 49 ... Pitch adjustment switch, 51 ... Second amplifier, 70 ... Telephone body.

Claims (1)

[Scope of utility model registration request] 1. An audio system comprising a microphone, a first amplifier connected to the microphone, a processor connected to the amplifier, a second amplifier connected to the processor, an audio signal memory and a microcomputer. A conversion device, wherein the processor includes a voice signal sampling circuit, an A / D converter, a voice signal processing circuit, and a D / A converter, and the sampling circuit samples the voice signal to obtain a divided voice signal. The audio signal processing circuit extracts and synthesizes each of the divided audio signals of the inner-spacing wavelength twice to create a first converted audio signal having a frequency of 1/2 of the frequency of the audio signal. Two or more of the specified ones of the divided-wavelength divided audio signals are input twice or the other twice, or the specified one of the divided-wavelength divided audio signals of the divided wavelengths. The first converted audio signal can be adjusted in pitch below or above the frequency of 1/2 of the audio signal by synthesizing one sound once and synthesizing the other sound twice. Further, the audio signal processing circuit collects every other divided audio signals obtained by sampling one wavelength of the audio signal by the sampling circuit and synthesizes the divided audio signals to obtain a second converted audio signal of two wavelengths. A second converted audio signal having a frequency twice the frequency of the audio signal is created by performing the creation on all wavelengths of the audio signal, and the two divided audio signals are collected while every other one of the two converted audio signals. By collecting and synthesizing one or two or more at a time, or collecting every other divided audio signal and collecting and synthesizing not only every other divided audio signal, Second The converted audio signal has a pitch adjustable above or below with reference to a frequency twice as high as the audio signal, and has a built-in audio conversion device for amplifying the converted audio signal by a second amplifier. A telephone with a built-in voice converter.