KR19980050649A - Voice to Text Converters in Digital Cell Phone Systems - Google Patents

Abstract

The present invention is directed to a voice-to-text conversion apparatus of a digital cellular telephone system which can convert and receive a voice or text form according to a user's selection when receiving information such as a call or a message from a mobile unit.

In the digital cellular telephone system according to the present invention, a voice-to-text conversion device detects a reception mode signal determined by a user's selection, and converts a voice into a text or converts a text into a voice according to the detected reception mode. A telephone exchange apparatus and a mobile telephone apparatus for determining a reception mode according to a user's selection and transmitting it to the mobile telephone exchange apparatus and separating and outputting voice and text received from the mobile telephone switching apparatus according to the reception mode.

According to the present invention, by converting a voice into a string or converting a string into a voice in a mobile telephone exchange according to a reception mode selected by the user, the user can make a call using a screen and a microphone, or listen to a received message by voice. You can receive a variety of services.

Description

Voice to Text Converters in Digital Cell Phone Systems

1 is a diagram schematically showing the configuration of a typical digital cellular telephone system.

2 is a block diagram showing the configuration of a conventional mobile switching center in the configuration of FIG.

3 is a block diagram showing the configuration of a conventional mobile telephone in the configuration of FIG.

Fig. 4 is a block diagram showing the configuration of a mobile switching center in a voice-to-character conversion apparatus of a digital cellular telephone system according to the present invention.

Fig. 5 is a block diagram showing the configuration of a mobile telephone in the voice-to-text conversion apparatus of the digital cellular telephone system according to the present invention.

FIG. 6 is a flowchart for explaining an operation principle of a voice-to-character conversion unit in the configuration of FIG. 4; FIG.

FIG. 7 is a flowchart for explaining the principle of operation of the controller in the configuration of FIG. 5; FIG.

* Explanation of symbols for main parts of the drawings

1: Mobile Telephone Switch Office (MTSO) 2,3: Cell-Site

4,5: Moving body 10: System control processor

11, 12: Digital exchange 13: Digital vocoder

14: Diversity combiner 20: Antenna

21: analog receiver 22: digital data receiver and decoder

23: digital baseband processor 24: transmitter

25: Speaker 26: Mike

30,210: controller 101: voice and character conversion unit

102: reception mode detection unit 200: voice / character separation unit

201: character decoder 202: character output

203: Receive mode processing unit 204: Multiplexing unit

220: display

The present invention is directed to a digital cellular telephone system, and in particular, when a mobile unit receives information such as a call or a message, a voice of a digital cellular telephone system that can be converted into a voice or text form according to a user's selection and received. It is a version of the character-to-character converter.

In general, a digital cellular telephone system consists of a mobile telephone switching office (hereinafter referred to as MTSO), a base station and a mobile station. Today, with the development of communication technology, the digital cellular telephone system has been extended to various functions such as accommodating new telephone services and multimedia services. For example, recent digital cellular telephone systems provide users with a short message service that allows recipients to receive text messages by sending up to 160 text messages to recipients when they are not able to communicate with the recipients according to the GSM method. Doing.

FIG. 1 schematically shows a configuration of a conventional digital cellular telephone system. In general, the MTSO 1 and the plurality of base stations Cel 1 -Site 2 and 3, which are system control and switching systems, include a plurality of mobile units; 4, 5) is configured.

In FIG. 1, the MTSO 1 provides an interface for controlling the base stations A and B (2,3), and the routing between the Public Switching Telephobne Network (PSTN) and the base stations A and B (2,3) Routing) and routing between base stations A and B (2,3). At this time, the MTSO 1 is connected to the base station through a telephone line, an optical fiber link, an ultrahigh frequency link, or the like. The base stations A and B (2,3) are connected to the mobile bodies I and J (4,5) through communication links such as 50a-50b, 51a-51b, 52a-52b, and 53a-53b. Here, an example of a communication method between the base stations A, B (2, 3) and mobile bodies I, J (4, 5) is a spread spectrum communication technique applied in US Patent No. 5,416,797.

FIG. 2 is a block diagram of an MTSO 1 in the digital cellular telephone system of FIG. 1, wherein the MTSO 1 is a system control processor 10, a first and second digital switchers 11 and 12, and a digital vocoder I (Digital). Vocoder 13, and Diversity Combiner 14. The digital vocoder 13 and diversity combiner 14 may be further connected to the first and second digital exchangers 11 and 12 as necessary.

In FIG. 1, when the normal diversity mode is activated, since the call is handled by two base stations A and B (2, 3), the MTSO 1 receives the same information from one or more base stations. Accordingly, the diversity combiner 14 of the MTSO 1 combines the above-mentioned information input through the second digital exchanger 12, generates a high quality signal, and outputs it to the digital vocoder 13. The digital vocoder 13 converts the voice signal input from the diversity combiner 14 into a standard format, i.e., a telephone format of 64 kbps PCM, and transmits it to the first digital switch 11, or encodes the input voice signal. 2 A bit string is output to the digital exchange 12. The second digital switch 12 is responsible for routing between the MTSO 1 and the base stations A, B (2, 3) under the control of the system control processor 10, and the first digital switch 11 is a system control processor ( It is responsible for routing between the cellular network and the PSTN under the control of 10). The system control processor 10 controls the first and second digital exchanges 11 and 12 to route data to and from the MTSO 1 so that calls can be transmitted to the base stations A, B (2, 3) and the digital vocoder 13. Assign appropriately to In addition, the system control processor 10 communicates with a control unit (not shown) of each of the base stations A and B (2, 3).

FIG. 3 is a block diagram of a mobile phone of mobile bodies I and J (4,5) in the digital cellular telephone system of FIG. 1, and generally includes an antenna 20, an analog receiver 21, a digital data receiver and decoder 22 And a digital baseband processor 23, a transmitter 24, a speaker 25, a microphone 26, and a controller 30.

In FIG. 3, the antenna 20 is connected to the analog receiver 21 and the transmitter 24 through a duplexer (not shown). Accordingly, the antenna 20 collects the signals transmitted from the base stations A and B (2, 3) of FIG. 1 and transmits them to the analog receiver 21, and transmits the signals input from the transmitter 24 to the base stations A and B (2). And 3). The analog receiver 21 receives a high frequency (hereinafter referred to as RF) signal from the antenna 20, converts it into an intermediate frequency (hereinafter referred to as IF) band, and uses a band equivalent filter (hereinafter referred to as BPF). To filter. The analog receiver 21 quantizes the filtered signal using an A / D converter and transmits the quantized signal to the digital data receiver and decoder unit 22. The digital data receiving and decoder unit 22 retrieves pilot signals received from the base stations A and B (2, 3) under the control of the control unit 30, and retrieves two or more bit strings received from the analog receiving unit 21. Demodulate using a demodulator. Then, the digital data receiving and decoder unit 22 diversity-combines the demodulated bit strings to obtain a good signal, and then corrects the error to transmit to the digital baseband processor 23. The digital baseband processing unit 23 including the vocoder decodes the bit string received from the digital data receiving and decoder unit 22 and outputs the decoded bit string to the speaker 25. In addition, the digital baseband processor 23 A / D-converts the audio signal input from the microphone 26, encodes the vocoder, and transmits the encoded audio signal to the transmitter 24. The transmitter 24 converts a signal input from the digital baseband processor 23 into an RF band and transmits the signal to the base stations A and B (2,3) through the antenna 20. The controller 30 controls the devices.

Such a digital cellular telephone system provides a short message service capable of text transmission and reception of message information. However, it is hoped that the user can now receive call information as text or message information as voice.

However, in the conventional digital cellular telephone system, since the conversion between signals is impossible, voice can be received only by voice, and a message can be received only by text.

The present invention has been made to solve the above shortcomings, and an object of the present invention is to select a voice reception mode or a text reception mode when a user receives information such as a call or a message and convert the voice into a string according to the reception mode in the MTSO. By converting or converting a character string into a voice, a user is provided with a voice-to-character conversion apparatus of a digital cellular telephone system which can be received in a selected mode.

It is an object of the present invention to provide a voice-to-text conversion apparatus of a digital cellular telephone system which can improve the user's convenience by converting and receiving a voice or text according to a user's selection.

In order to achieve the above object, the telephone control program updating device of the digital cellular telephone system according to the present invention comprises a plurality of mobile telephone devices, one or more base stations that are wirelessly coupled to the plurality of mobile telephone devices, and are coupled with one or more base stations. A digital cellular telephone system having a mobile telephone exchange apparatus, comprising: a mobile telephone exchange apparatus for detecting a reception mode signal determined by a user's selection and converting a voice into a text or converting a text into a voice according to the detected reception mode; And a mobile telephone apparatus for determining a reception mode according to a user's selection and transmitting the received message to the mobile telephone switching apparatus and separately outputting voice and text received from the mobile telephone switching apparatus according to the reception mode. .

In addition to the above objects and objects of the invention will become apparent through the description of the embodiments of the present invention with reference to the accompanying drawings.

Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 4 to 7.

4 is a block diagram of an MTSO 100 in a digital cellular telephone system according to the present invention. In contrast to the configuration of FIG. 4 and the configuration of FIG. 2 according to the related art, the configuration of FIG. 4 further includes a reception mode detector 102 and a voice-to-character converter 101. Therefore, detailed descriptions of the components and their operations that overlap with the description of the configuration of FIG. 1 will be omitted.

FIG. 6 is a flowchart for explaining the operation principle of the voice-to-text conversion unit 101 in the configuration of FIG.

In the MTSO 100 of FIG. 4, the reception mode detection unit 102 controls the base stations A, B (2, 3), the second digital switch 12, and the diversity combiner 14 from the mobile phone according to a user input described later. The reception mode signal transmitted via the signal is detected and output to the voice-to-character conversion unit 101. The voice-to-text converter 101 converts voice into text or text into voice according to the reception mode detected by the reception mode detector 102, and the second digital switch 12 and the base stations A and B (2). 3) to the mobile phone.

The operation principle of the voice-to-text conversion unit 101 will be described in detail with reference to FIG. 6. First, step 1 of determining whether a reception mode input from the reception mode detection unit 102 is a voice mode or a text mode is performed. If the reception mode is determined as the voice mode according to the determination of step 1, step 2 of determining whether the data to be transmitted is a voice (message) or not is performed. If the data to be transmitted is determined as text based on the determination in step 2, step 3 of converting the text signal into a voice signal and transmitting it to the mobile phone through the base stations A and B (2, 3) is performed. If the data to be transmitted is determined to be voice, the data is transmitted to the mobile telephone without conversion. On the other hand, if the reception mode is determined as the text mode by the determination in step 1, step 4 of determining whether the data to be transmitted is text or voice is performed. If the data to be transmitted is determined to be voice based on the determination in step 4, step 5 is performed to convert the voice signal into a text signal and transmit the voice signal to the mobile phone through the base stations A and B (2, 3). If the data to be transmitted is determined as text by the determination in step 4, the data is transmitted to the mobile telephone without conversion.

In this case, the steps 3 and 5 in the method of converting the voice-to-character converter 101 may be generally implemented using speech synthesis and speech recognition technology. In other words, a speech synthesis technique, which has been studied in computers and the like, may be used to convert text into speech signals, and speech recognition technology may be used to convert speech into text signals.

Fig. 5 is a block diagram showing the configuration of the mobile telephone in the voice-to-text conversion apparatus of the digital cellular telephone system according to the present invention. In contrast to the configuration of FIG. 5 and the conventional configuration of FIG. 3, FIG. 5 illustrates a voice / character separator 200, a character decoder 201, a character output unit 202, and a reception mode processing unit 203. In addition, the multiplexing unit 204 is further provided, and the control unit 210 is provided with an extended function. Therefore, detailed descriptions of the components overlapping with those of FIG. 3 and their operations will be omitted.

7 is a flowchart illustrating an operation principle of the controller 210 in the configuration of FIG. 5. In the mobile phone of Fig. 5, the voice / text separator 200 separates the bit string output from the digital data reception and decoder unit 22 into voice and text. Also, the voice / text separator 200 selects a voice signal processing path or a text signal processing path with reference to the reception mode signal input from the reception mode processing unit 203 via the control unit 210 and the node 300. When the voice signal processing path is selected by the voice / character separator 200, voice information is output to the digital baseband processor 23 and output to the speaker 25 through a process for voice assimilation according to the prior art. do. On the other hand, when the text signal processing path is selected by the voice / text separator 200, the text information is output to the text decoder 201. The text decoder 201 decodes the text information input from the voice / text separator 200, converts the text information into a format recognizable by the LCD 220, and outputs it to the text output unit 202. The character output unit 202 controls the LCD 220, and outputs the information input from the character decoder unit 201 to the LCD 220 under the control of the controller 210. The reception mode processor 203 determines a reception mode according to a user's selection, and transmits the reception mode to the voice / text separator 200 through the controller 210 and the node 300 to process the voice signal processing path and the text signal. Controls the path selection. In addition, the reception mode processing unit 203 transmits the reception mode to the MTSO 100. The multiplexer 204 multiplexes the reception mode signal generated by the reception mode processing unit 203 to the transmission unit 24 by transmitting the reception mode signal to the reception mode signal when there is no voice information. do. The control unit controls all of the devices to separate and output the voice signal processing path and the text signal processing path according to the reception mode.

A detailed operation principle of the controller 210 will be described with reference to FIG. 7. First, step 10 of determining a reception mode as voice reception or text reception according to a user input is performed. If the reception mode is determined by step 10, step 11 of inserting the reception mode into the voice signal and transmitting the received mode to the MTSO 100 is performed. Next, in step 1, it is determined whether the reception mode is voice reception or text reception. If the voice reception mode is determined in step 12, the digital baseband processor 23 restores the voice signal to the speaker 25 in step 13. On the other hand, if the character receiving mode is determined in step 12, the character decoder 201 and the character output unit 202 outputs the display character 14. Therefore, the user can select a reception mode to talk by voice or text.

As described above, in the voice-to-text conversion apparatus of the digital cellular telephone system according to the present invention, the user selects a voice reception mode or a text reception mode and converts the voice into a string or converts the text into a voice in MTSO according to the reception mode. By converting to, since the user can be provided with various services such as making a call using the screen and a microphone or listening to a received message by voice, there is an effect of improving user convenience.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (3)

A digital cellular telephone system having a plurality of mobile telephone apparatuses, one or more base stations wirelessly coupled to a plurality of mobile telephone apparatuses, and a mobile telephone exchange apparatus coupled to one or more base stations, the reception mode signal determined by a user's selection A mobile telephone switching device that detects and converts voice into text or converts text into voice according to the detected reception mode; And a mobile telephone apparatus for lengthening a reception mode according to a user's selection and transmitting it to the mobile telephone switching apparatus and separating and outputting voice and text received from the mobile telephone switching apparatus according to the reception mode. Voice-to-text converters in telephone systems. The apparatus of claim 1, wherein the mobile telephone exchange device comprises: a digital switch for routing data input and output, a system control processor for controlling the routing, and a diversity combiner for combining and outputting the input information into a high quality signal; A digital vocoder for format-converting or encoding a signal input from the diversity combiner, reception mode detecting means for detecting a reception mode from a signal input from the diversity combiner, and a voice into a text according to the detected reception mode; And a voice-to-text conversion device for converting or converting a text into a voice. The apparatus of claim 1, wherein the mobile telephone apparatus comprises: an analog receiver for intermediate frequency converting a signal of a high frequency band received through an antenna and a digital signal; and a digital data receiver for demodulating and error correcting a signal input from the analog receiver. And a digital baseband processor for decoding the bit stream received by the digital data receiver and the decoder, or for digitally converting and encoding a signal input from a microphone, and a signal input from the digital baseband processor. A voice / character separation means for separating the bit stream inputted from the transmitter and the digital data receiving and decoder unit through an antenna and inputting the digital data into voice and text, and selecting respective paths; Decode the character information input from the means A character decoder means for converting to a format recognizable by the splay unit, a character output means for controlling the display unit, and outputting information input from the character decoder means to the display unit under the control of the control means, and receiving mode according to a user's selection Receiving mode processing means for controlling the path selection by transmitting the receiving mode to the voice / text separating unit through a control unit and transmitting the receiving mode to the mobile switching device, and the receiving mode processing unit for voice information to be transmitted. And multiplexing means for multiplexing a reception mode generated by the digital signal transmission system, and a control means for controlling separation of a voice signal processing path and a text signal processing path according to the reception mode. .