KR200190012Y1 - Voice transmission apparatus including voice transformation device - Google Patents

Abstract

TECHNICAL FIELD The present invention relates to a voice transmission device such as a wired / wireless telephone, and more particularly, to a voice transmission device having a voice modulation device capable of modulating the voice of a caller.

Voice transmission apparatus according to the present invention includes a microphone for inputting the talker's voice; A voice modulator for modulating a tone and frequency characteristic of the voice signal electrically converted through the microphone; And transmitting means for transmitting the modulated voice through the voice modulator.

When the user of the voice communication device communicates through the device, the voice conversion device according to the present invention can satisfy various needs of modern people by enabling the user to talk by modulating his / her voice with various tones as well as his voice. It has an effect.

Description

Voice transmission apparatus including a voice modulation device

The present invention relates to a voice transmission device, such as a wired and wireless telephone, and more particularly to a voice transmission device having a voice modulation device that can modulate the voice of the caller. to be.

The main purpose of all existing wired and wireless telephones was to deliver the caller's voice in the form closest to the original sound with as little distortion and noise as possible. This is a natural consequence because it is an indispensable requirement for all telephones as a means of communication.

However, as most people are using the telephones these days, and the frequency of their use has sharply increased, simply giving and receiving their own voices is not enough to satisfy the user's needs.

For example, some users may be unsatisfied with the complexness of their phone voices, and aren't happy with their voices as they are. You may want to respond in a male voice, to imitate your favorite celebrity voice, or to create a variety of your favorite voices to have unique fun with your friends. There may also be.

However, the existing telephones could not satisfy these various needs of modern people.

The present invention has been devised to meet the above demands, and has a voice modulation device that allows a user to directly manipulate various types of voice modulation or to receive and manipulate parameters necessary for modulation from a device manufacturer or a third party. It is an object to provide a transmitting device.

1 is a block diagram showing the configuration of a conventional CDMA digital cordless telephone.

Figure 2 is a block diagram showing a CDMA type digital cordless telephone with a speech modulation device according to the present invention.

3 is a block diagram showing a detailed configuration of the voice modulator shown in FIG.

4 is a frequency spectrum diagram showing an example of speech conversion in the apparatus shown in FIG. 3.

FIG. 5 is a frequency spectrum diagram showing another example of speech conversion in the apparatus shown in FIG. 3.

6 is a flowchart illustrating a process of extracting a sound conversion parameter applicable to the apparatus shown in FIG. 3.

Voice transmission apparatus according to the present invention for achieving the above object is a microphone for inputting the talker's voice; A voice modulator for modulating a tone and frequency characteristic of the voice signal electrically converted through the microphone; And transmitting means for transmitting the modulated voice through the voice modulator.

The voice modulator may include: a sampler for sampling a voice signal input through the microphone and converting the voice signal into a discontinuous voice signal; A Fourier transformer for converting the discontinuous speech signal provided by the sampler into frequency components; A converter for converting an amplitude and a spectral distribution for each frequency band with respect to an audio signal converted into a frequency component through the Fourier transformer; And an inverse Fourier transformer for converting the output of the transducer into a discontinuous speech signal.

As the society becomes unstable, even when a woman or a child is at home alone, she is afraid of receiving an incoming call. In this case, the voice transmission device according to the present invention is used to convert the voice of an adult into a male voice. Calling can remove some of the anxiety.

Also, if you have a complex in your voice, you can transform it into your favorite voice, or, with the help of a professional, shape your phone voice. In this case, the expert can easily provide the conversion parameters suitable for the voice required by the user by the parameter extraction method described above.

Adolescents may want to mimic the voices of their favorite entertainers, sports stars, or entertainment machines. Experts can extract parameters more effectively using external devices or simulation software, and then input the Internet or other means of communication, or directly into the voice transmitter of the present invention. These various voice conversions can add not only social necessity but also various fun and intimacy with each other by various tone changes when talking with friends or talking with lovers.

With reference to the accompanying drawings will be described in detail the configuration and operation of the subject innovation.

Conventional telephones are implemented so that a user's voice transmitted through a microphone can be simply amplified in the case of analog and converted into a digital signal in the case of digital, thereby transmitting and receiving wirelessly through a wired interface or through a wireless interface. Therefore, no device capable of modulating the sound in the middle is implemented, and all components are aimed at transmitting the original sound as much as possible with the minimized sound distortion and noise.

Fig. 1 is a block diagram showing the configuration of a conventional code division multiple access (CDMA) digital cordless telephone. The apparatus shown in FIG. 1 includes a microphone 101, a PCM codec 103, a VOCODER 104, a convolutional codec 105, and a block interleaver 106. And a PN code spreader 107, a transmitter 108, an antenna 109, and a speaker 110.

In the transmission operation, the voice signal transmitted through the microphone 101 is converted into a digital signal through the PCM codec 103 and then compressed by the vocoder 104 to reduce the amount of data to be transmitted, and corrects an error that may occur during transmission. The error correction coding is performed through the convolutional encoder 105, the interleaver 106, and the like, and CDMA is enabled through the PN code spreader 107 and then transmitted through the transmitter 108 and the antenna 109.

The reception process proceeds in the reverse order of the transmission process and is output through the speaker 110. As described above, although the voice signal is converted into various forms during the transmission process, the reverse process for ultimately restoring the original form is performed during the reception process, so that the signal output from the speaker 109 is the same as the original voice signal.

Figure 2 is a block diagram showing a CDMA type digital cordless telephone with a speech modulation device according to the present invention. The apparatus shown in FIG. 2 is configured such that a voice modulator 202 is inserted between the microphone 201 and the PCM codec 203 to modulate and transmit the voice signal of the talker.

In the apparatus shown in FIG. 2, the analog voice signal electrically converted through the microphone 201 is modulated into a voice signal having a different tone or a different spectrum distribution through the voice modulator 202.

The voice signal modulated by the voice modulator 202 is converted into a digital signal through the PCM codec 203 and then compressed by the vocoder 204 to reduce the amount of data transmitted, and a convolutional code to correct errors that may occur during transmission. The error correction coding is performed via the encoder 205, the interleaver 206, and the like, and CDMA is enabled through the PN code spreader 207, and then transmitted through the transmitter 108 and the antenna 109. Here, the means consisting of the PCM codec 203, vocoder 204, convolutional encoder 205, interleaver 206, PN code spreader 207, transmitter 208, and antenna 209 is of the present invention Corresponds to the means of transmission in summary.

In this case, the signal finally output from the speaker 210 during the reception process becomes a voice signal modulated by the voice modulator 202 instead of the original voice signal.

3 is a block diagram showing a detailed configuration of the voice modulator 202 shown in FIG. The apparatus shown in FIG. 3 includes a sampler 301, a fast furie transformer (FFT) 302, a transformer 303, an inverse fast furie transformer (IFFT) 304, a coefficient change register 305, and a microprocessor 306. And an input device 307 and a communication input device 308 in the telephone apparatus.

In an actual application, a fast furie transformer (FFT) 302, a converter 303, an inverse fast furie transformer (IFFT) 304, and the like may be implemented as a digital signal processor (DSP).

The analog voice signal input to the voice modulator 202 is converted into a discontinuous voice signal through the sampler 301 and converted into a voice signal in the frequency domain through the FFT 302. The FFT transformed signal is converted into a discontinuous speech signal by the IFFT 304 after the frequency band amplitude and frequency conversion is converted by the converter 303. This discontinuous speech signal is not the original speech signal but a voice signal in which the tone and spectral distribution are modulated.

Parameters for voice modulation are stored in the coefficient change register 305 and the converter 303 performs voice conversion with reference to the coefficients stored in the coefficient change register 305. Parameters stored in the coefficient change register 305 may be changed by the microprocessor 306. As such, various types of voice modulation are possible through the microprocessor 306 and the coefficient change register 305.

In the telephone according to the present invention, voice modulation is possible as desired by the user by the input device 307 in the phone that can communicate with the microprocessor 306, and separately provided by the device provider or a third party by the communication input device 308. It is also possible to download and use parameters. Here, the input device 307 in the telephone corresponds to the first input device in the summary of the present invention, and the communication input device 308 corresponds to the second input device in the summary of the present invention.

When applied to the CDMA terminal as shown in FIG. 3, even when the voice modulator 202 outputs a discontinuous signal, the PCM codec 203 can introduce it, and the low pass filter inside the PCM codec 203 during the reception process. It is output as an analog voice signal (not shown) so that a separate low pass filter is not necessary. However, in case of an analog telephone, an analog voice signal must be transmitted, and in addition to the apparatus shown in FIG. 3, a low pass filter for converting the output of the IFFT 304 into an analog voice signal is further provided.

4 is a frequency spectrum diagram showing an example of speech conversion in the apparatus shown in FIG. 3. FIG. 4A shows a spectrum of a speech signal converted by the FFT 301. FIG. 4B is a spectrum diagram showing a distribution of amplitude coefficients (shown in dotted lines) for frequency modulation for speech modulation. FIG. 4B is a spectrum diagram showing a result of applying an amplitude coefficient for each frequency band shown in FIG. 4B to the illustrated signal. Comparing FIG. 4A and FIG. 4C, it can be seen that the original voice signal as shown in FIG. 4A is modulated into a voice signal having a different amplitude for each frequency band as shown in FIG. 4C. By applying an amplitude coefficient for each frequency band as shown in FIG. 4B, an audio signal having a different tone can be obtained.

FIG. 5 is a spectral diagram showing another example of voice modulation in the apparatus shown in FIG. 3. In FIG. 5A, if the portion indicated by the dotted line in the center is the spectrum representing the original voice, when it is moved as shown by the solid line to the low or high range, the voice is modulated by the male or female voice.

FIG. 5B is a case in which the spectral spacing of the portion indicated by the dotted line in FIG. 5A is widened and is modulated by filling it with zeros as shown by ○, and FIG. 5C is widening the spectral spacing and in between the dotted lines. As shown, the modulation is performed by inserting the average amplitude of the neighboring spectrum.

4 to 5 show examples of simple voice conversion, the voice modulator according to the present invention may allow the user to arbitrarily vary the sound by the input device 307 in the telephone apparatus of FIG. The sound conversion parameters provided by the device manufacturer or a third party may be downloaded and executed by the coefficient change register 305, the microprocessor 306, and the communication input device 308 of FIG.

FIG. 6 is a flowchart illustrating a process of extracting a conversion parameter applicable to the apparatus illustrated in FIG. 3, and illustrates an example of extracting a conversion parameter that may be similar to a voice of a celebrity (a conversion target).

First, the celebrity and the person to be modulated sample voices that read the same TEXT (s601).

Fast Furie Transform (FFT) is performed on the sampled voices to convert them to frequency domain components (s602).

An average amplitude of each frequency is calculated for each of the two speech signals converted into the frequency domain components. (S603)

By calculating the difference of the mean amplitude of each frequency between the two voice signals using the calculated mean amplitude of each frequency and subtracting it from the mean amplitude of each frequency of the modulation target, a transform extraction target factor that is a pure tone difference component is obtained (s604). In other words, through the process s604, the transform extraction target factor of the modulation target of which the difference component appears according to the loudness of the celebrity and the modulation target, regardless of the tone, is obtained.

The conversion parameter which is the difference between the frequency components and the amplitude differences for each frequency component between the transform extraction target factor and the celebrity speech signal is obtained (s605).

The voice signal to be modulated is modulated by the conversion parameter obtained in step S605.

Inverse Fast Furie Transform (IFFT) is performed on the modulated speech signal of the modulator to convert it into a discontinuous speech signal (s607).

The discontinuous speech signal obtained through the process s607 is low-pass filtered and converted into a continuous speech signal. (s608)

The voice signal obtained through the process s608 is output through the speaker and compared with the voice of the celebrity. (s609) In the process s609, it is determined whether the difference between the voice of the celebrity and the voice of the modulator is within the allowable range. This permissible range can be appropriately selected by the person performing the extraction of the conversion parameters.

It is determined whether the conversion result is satisfactory, that is, within the allowable range (s610).

If the level is not satisfactory, modulate the voice signal of the target to be modulated with the first conversion parameter (s611) and then perform steps s603 to s610 again to convert to the second and third order and finally reach a satisfactory level. The parameter values obtained in the second, second and third orders are summed (s612) to obtain the final conversion parameter values.

Finally, the conversion parameters suitable for the actual speech modulator are extracted from the final conversion parameter values. (S613) The steps s601 to s612 may use computer simulation software such as MATLAP or a hardware-implemented device, but may be used in practice. Since the speech modulator itself has its own characteristics, the speech modulator itself is added to the extracted final conversion parameter value to obtain a conversion parameter value to be used.

2 to 3 may be implemented as a separate device independent of the telephone. In this case, the voice modulator is provided with a power supply for supplying operating power to the components shown in FIG. 3, and may be made to be simply attached to the telephone.

On the other hand, even in the case where the transmission and reception of a voice signal is processed in the form of data communication as in a telephone call on the Internet, an equivalent effect can be obtained by adding a software module such as the voice modulator disclosed in the present invention.

As described above, it should be noted that the scope of the present invention can be extended not only when the apparatus is used inside the telephone, but also when the voice modulator is used in combination with the existing telephone or the telephone.

As described above, the voice transmission apparatus according to the present invention enables a user of a voice communication device to communicate by modifying his / her voice with various tones as well as the voice of the user when the user of the voice communication device communicates with the present invention. It has the effect of satisfying various needs.

Claims (4)

A microphone for inputting a talker's voice; A voice modulator for modulating a tone and frequency characteristic of the voice signal electrically converted through the microphone; And And transmission means for transmitting the modulated voice via the voice modulator. The voice modulator of claim 1, wherein the voice modulator A sampler for sampling a voice signal input through the microphone and converting the voice signal into a discontinuous voice signal; A Fourier transformer for converting the discontinuous speech signal provided by the sampler into frequency components; A converter for converting an amplitude and a spectral distribution for each frequency band with respect to an audio signal converted into a frequency component through the Fourier transformer; And And an inverse Fourier transformer for converting the output of said transducer into a discontinuous speech signal. The method of claim 2, A coefficient storage register for storing a conversion parameter representing a conversion degree of amplitude and spectrum distribution for each frequency band of the converter; A first input device provided in the voice transmission device and inputting conversion parameters from a user; And And a microprocessor for storing the conversion parameters provided through the first input device in the coefficient storage registers. And the converter performs the conversion by referring to the conversion parameter stored in the coefficient storage register. The method of claim 3, A second input device connected to a communication line and inputting a conversion parameter transmitted through the communication line, And the microprocessor selectively stores the conversion parameters provided through the first input device or the second input device in the coefficient storage register.