JP2002033851A - Mobile phone - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mobile phone with user-friendliness close to that of a voice speech by a conventional line switching by reducing the consumed amount of channel resources and charging on users. SOLUTION: A voice recognition section 12 recognizes a voice received from a microphone 11 as to whether or not a voice is a voice of a specific talker, and converts the result of speech recognition into character data, a packet assembly section 15 assembles the character data into packets and transmits the packets to a designated speech opposite party, a vice coding section 13 converts the character data and part of failed recognition into coded voice data when the speech recognition is failed, the packet assembly section 15 assembles the character data the converted coded voice into packets and transmits the packets to the designated speech opposite party, a voice read section 22 reproduces character data sent from a specific speech opposite party through packet transmission into a voice signal on the other hand and a voice decoding reproduction section 23 properly decodes and reproduces the coded voice data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile phone,
In particular, the present invention relates to a mobile phone that supports data communication by packet switching. In this specification, a mobile phone means not only a so-called mobile phone but also a PHS (Personal Handyph).
one System).

[0002]

2. Description of the Related Art In recent years, the conventional telephone network is changing from a network using voice-only circuit switching to a packet-switching network integrating data communication. There is a trend toward multi-functionality and high functionality to multimedia terminals that also perform transmission and the like. At the same time CPU and DSP mounted on mobile phones
CPUs and DSPs for applications other than telephone functions also tend to be added, such as image compression / decompression, voice recognition, etc., which were not realistic in terms of calculation amount and power consumption. Features are also becoming reality.

On the other hand, the function as a conventional voice terminal is still important as a function of a portable telephone, but there is not much change, and there is room for improvement in usability. As a feature of the packet switching network compared to the conventional circuit switching network, which charges based on time after occupying the line, charging according to the amount of transmitted data is made and used regardless of the length of connection time The point is that only the data transmission amount is charged. With this, in applications where data transmission occurs intermittently, such as browsing only necessary information at any time while connected to an information service, etc., connection is made every time a data request is generated, and communication is terminated. This eliminates the trouble of immediately disconnecting, and is effective in effectively utilizing line resources and reducing user billing.

However, in a voice call, for example, for a long time,
If you leave the line connected, you will be charged according to time and the user's financial burden will be great, and it will be necessary to make calls, make calls and repeat disconnection whenever necessary, every time it takes trouble to call and disconnect or every time you connect The problem that it takes time for the mobile station and the base station, the partner mobile station, and the like to perform the connection procedure with each other has not been improved. Examples of applications in which the telephone line is kept connected for a long time include applications in which the state in which the immediacy of a call is important continues for a long period of time, such as nursing care use or business contact means.

[0005] Japanese Patent Application Laid-Open Nos. 11-168552 and 10-240283 disclose a portable telephone having a voice recognition function. In other words, Japanese Patent Application Laid-Open No. 11-168552 proposes a mobile phone device that converts voice data into text data using voice recognition and records the data in a memory when the content of a call is stored in a memory, thereby extending the recording time. Have been. Japanese Patent Application Laid-Open No. Hei 10-240283 discloses that, in a voice call, in order to reduce the ambient noise, the voice of the speaker is recognized at the transmission stage and then the voice is synthesized to remove the ambient noise. (A transmission content is voice data or voice coded data), and a voice processing device and a telephone device have been proposed.

[0006]

Problems to be Solved by the Invention
In the voice processing device and the telephone device described in Japanese Patent Publication No. 83, the voice is once converted into character information by voice recognition means, but is converted back to a voice signal by voice synthesis and transmitted through a circuit switching network. It does not contribute to a reduction in the usage of line resources and charging. Also, JP-A-11-168
In the portable telephone device described in Japanese Patent Application Publication No. 552, speech recognition is used not for transmission but for the purpose of reducing the amount of data to be recorded (recorded). In this case, only the voice of the near-end speaker is used. It is also necessary to recognize the other party's voice, and it is necessary to perform unspecified speaker recognition, which is generally disadvantageous in terms of calculation amount and recognition rate, and also consider the problem of recognition rate which is not 100% at present. Not.

[0007] Also, the method of transmitting coded voice packets does not use line resources in sections where voice is not present (for circuit switching, for example, in the cdma One variable-rate voice coding scheme EVRC, there is no voice section). However, transmission is performed at the lowest rate of 1/8), so there is a possibility of improvement in the amount of line resources used, but the effect is small because the amount of coded voice data to be transmitted does not change much. Current circuit switching time billing (eg 10 seconds /
In the system of charging the information amount of packet switching (10 yen) (for example, 128 octets / 0.1 yen), there is little effect of reducing the charging, or conversely, it may be expensive.

For example, assuming that a sentence of about 100 characters in katakana is read out without breathing in about 10 seconds, 10 yen for 10 seconds for circuit switching and 800 yen for a packet.
0 bps × 10 seconds / (128 octets × 8 bits / octet) × 0.1 yen = 7.8 yen However, in the case of a packet, both transmission and reception are charged, so the calculation is twice as much as 15.6 yen. If characters are sent in 1 character / 2 bytes, 100 characters x 100 characters x 2 bytes x 8 bits
/ byte / (128 octets × 8 bits / octet) × 0.1 yen = 0.16 yen, which is a remarkably low charge.
The present invention has been made in view of such circumstances,
It is a first object of the present invention to provide a portable telephone which can reduce the amount of line resources used and the charge to a user, and which is easy to use and is close to a voice call by conventional line switching. It is a second object of the present invention to provide a mobile phone with improved convenience.

[0009]

According to a first aspect of the present invention, there is provided a portable telephone compatible with packet transmission, wherein a voice of a transmitting stage is transmitted during a telephone call. Person voice recognition, the voice recognition result is converted into character data,
The character data is packet-transmitted to a designated communication partner. If the voice recognition fails in the voice recognition, the character data and the recognition failure portion are converted into coded voice data. It is characterized in that voice data and packets are transmitted to a designated communication partner, while reading of character data transmitted from a specific communication partner by packet transmission and decoding and reproduction of encoded voice data are performed as appropriate.

According to the first aspect of the present invention, at the time of a telephone call, the voice at the transmitting stage is recognized as a specific speaker's voice, the voice recognition result is converted into character data, and the character data is transmitted to a designated communication partner by packet transmission. If the speech recognition fails in the speech recognition, the character data and the recognition failure portion are converted into encoded speech data, and the converted encoded speech data is packet-transmitted to a designated communication partner. On the other hand, the reading of character data transmitted from a specific communication partner by packet transmission and the decoding and reproduction of encoded voice data are performed as appropriate, thereby reducing the amount of line resources used and the charge to the user. Thus, it is possible to realize a mobile phone that is as easy to use as a voice call by conventional circuit switching.

According to a second aspect of the present invention, in the portable telephone according to the first aspect, character data transmitted and received by packet transmission is displayed on a screen. I do.

According to the invention described in claim 2, according to claim 1,
In the mobile phone described in the above, character data transmitted and received by packet transmission is displayed on the screen,
It is easy to check the contents of the call, and the convenience can be improved.

According to a third aspect of the present invention, there is provided a packet switching network in which character data or coded voice data to be transmitted is converted into a packet by adding an address of a communication partner to the packet switching network. A mobile phone having packetizing means for transmitting and packet restoring means for restoring a received packet to character data or encoded voice data, wherein the mobile phone recognizes a voice signal input at a transmitting stage during a voice call, Voice recognition means for converting to character data, voice coding means for converting a voice signal in a portion where voice recognition failed in the voice recognition means into coded voice data, character data output from the voice recognition means, and Selecting means for selectively outputting coded voice data output from the voice coding means to the packetizing means; A data distributing means for distributing the data to a voice reading means or a voice decoding / reproducing means in accordance with the type of the restored data; and a voice reading for reading the character data input from the data distributing means as voice. Upper means, audio decoding / reproducing means for decoding and reproducing the encoded audio data inputted from the data distribution means,
A speech signal output from the voice reading means and a voice signal output from the voice decoding / reproducing means;

According to the third aspect of the present invention, the voice signal input at the transmitting stage during voice communication is recognized by voice,
Voice recognition means for converting to character data, voice coding means for converting a voice signal in a portion where voice recognition failed in the voice recognition means into coded voice data, character data output from the voice recognition means, and Selecting means for selectively outputting coded voice data output from the voice coding means to the packetizing means; and reading out the data according to the type of data restored by the packet restoring means or voice reading means. Data distributing means for distributing the data to the decoding / reproducing means, voice reading means for reading out the character data inputted from the data distributing means as voice, and decoding of the encoded voice data inputted from the data distributing means. Audio decoding / reproducing means for converting and reproducing, an audio signal output from the audio reading means and an audio signal output from the audio decoding / reproducing means Since it has a synthesizing means for synthesizing a voice signal and outputting it to a voice output means, it is possible to reduce the amount of line resources used and the charge to the user, and it is easy to use a portable telephone which is close to a conventional voice call by line switching Can be realized.

The invention described in claim 4 is the same as the claim 3.
The portable telephone described in (1), further comprising display means for displaying character data transmitted and received by packet transmission on a screen.

According to the invention set forth in claim 4, according to claim 3,
Since the mobile phone described in (1) has display means for displaying character data transmitted and received by packet transmission on the screen, it is easy to check the contents of the call and to improve the convenience.

The invention described in claim 5 is the third invention.
5. The mobile phone according to claim 4, wherein the voice recognition unit is a specific speaker voice recognition unit in which the voice of a specific user is learned in advance.

According to the invention described in claim 5, according to claim 3,
In the mobile phone according to any one of the first to fourth aspects, the specific speaker voice recognizing means in which a specific user's voice has been learned in advance is used as the voice recognizing means. It is possible to reduce the amount of computation and computational performance of the CPU or DSP required to realize the user voice recognition means. In addition, since the portion where the speech recognition has failed is transmitted as coded speech data, even if the speech recognition rate is not 100%, the loss of the conversation content is suppressed,
Practical voice calls can be realized even with realistic voice recognition performance.

According to a sixth aspect of the present invention, there is provided a portable telephone according to the fourth or fifth aspect, further comprising inputting character data in a transmission stage. It has character input means, and the selecting means,
The packet selectively selects any one of character data output from the character input unit, character data output from the voice recognition unit, and coded voice data output from the voice coding unit. Output to the conversion means.

According to the invention described in claim 6, according to claim 6 of the present invention.
The portable telephone according to any one of claims 4 and 5, further comprising a character input unit for inputting character data in a transmission stage, wherein the selection unit is provided with a character input unit. Any one of the output character data, the character data output from the voice recognition unit, and the encoded voice data output from the voice encoding unit is selectively output to the packetizing unit. As a result, the contents of the call can be transcribed and the character data can be displayed on the screen, and at the same time, the character data can be input by the character input means. It becomes possible to talk with.

The invention described in claim 7 is the same as the claim 6.
The mobile phone according to claim 1, further comprising a storage unit for storing character data to be transmitted and received by packet transmission, and an operation unit for designating various operations, and the character stored in the storage unit by operation of the operation unit. Data is read out and displayed on the display means.

According to the invention of claim 7, according to claim 6,
The mobile phone according to claim 1, further comprising a storage unit for storing character data to be transmitted and received by packet transmission, and an operation unit for designating various operations, and the character stored in the storage unit by operation of the operation unit. Since the data is read out and displayed on the display means, the contents of the conversation can be recorded by using character information having a smaller data amount as compared with the encoded voice data. Can be recorded and reproduced as audio.

The invention described in claim 8 is the same as the invention described in claim 7.
In the mobile phone described in the above, the storage means stores, in addition to the character data transmitted and received by packet transmission, encoded voice data, the character data or the character data stored in the storage means by the operation of the operation means The encoded audio data is read and reproduced as an audio signal by the audio reading means or the audio decoding / reproducing means.

According to the present invention, in addition to the character data, the encoded voice data is stored in the storage means,
By reading these data by operating the operation means and reproducing the data as a voice signal by the voice reading means or the voice decoding / reproducing means, it is possible not only to confirm the character information on the screen but also to listen to the voice as voice. .

[0025]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a configuration of a mobile phone according to an embodiment of the present invention. In the figure, the mobile phone according to the present embodiment is compatible with packet transmission, and demodulates an antenna 1 and a signal received via antenna 1 into a baseband signal, or converts a carrier wave using the baseband signal. An RF unit 2 for modulating and transmitting from an antenna;
And a baseband processing unit 3. The baseband processing unit 3 converts the packet output from the packetizing unit 15 into a baseband signal and outputs the baseband signal to the RF unit 2, or extracts a packet from the baseband signal received from the RF unit 2, and 20.

Further, the mobile phone according to the present embodiment
It has an input unit 10, a microphone 11, a speech recognition unit 12, a speech encoding unit 13, and a selector 14. The input unit 10 includes a start key used at the time of a call, an end key used at the end of the call, a numeric keypad including a numeric key (also used as a character key) and a code key, and a function used at the time of setting various functions. It has a key, a power key, a clear key for releasing various settings, and the like. Input unit 10
Is equivalent to the character input means and the operation means of the present invention, and is used for input of character data and various operations.

The voice recognition unit 12 has a function of recognizing voice of a voice signal input from the microphone 11 constituting a transmitting stage during voice communication and converting the voice signal into character data. In the present embodiment, the voice recognition unit 12 uses a specific speaker voice recognition unit that has learned the voice of a specific user in advance. The voice recognition unit 12 corresponds to a voice recognition unit of the present invention.

As means for speech recognition, generally speaking, a relatively large amount of calculation is required, and learning is performed in advance by the voice of the owner or user of the mobile phone, instead of speech recognition of an unspecified speaker having a low recognition rate. The specific speaker voice recognition means can be used. When the contents of a call in a mobile phone are to be transcribed by voice recognition means, two-way voices are recognized: a voice from the user to the other party in the transmitting stage and a voice from the other party to the user in the receiving stage. It is also necessary to use an unspecified speaker's voice recognition means to recognize the voice, since the other party is usually not a specific person but an unspecified number of people.
In the present embodiment, since the voice recognition is performed only at the transmitting stage, only the user of the mobile phone needs to perform voice recognition.

When one or a small number of users of the speech recognition apparatus are used, a codebook or a template used for speech recognition is previously learned using the speech of each user, so that the unspecified speaker's speech can be obtained. It is known that a higher speech recognition rate can be obtained compared to recognition. A mobile phone can be generally considered to be used by a specific user today. In this case, a CPU and a DSP which can be mounted on the mobile phone by using specific speaker voice recognition means.
Thus, a sufficient recognition rate can be obtained with a calculation amount that can be realized by the above.

The voice coding unit 13 has a function of converting the voice signal in the portion where voice recognition has failed in the voice recognition unit 12 into coded voice data. Selector 14
Selectively outputs any of the character data output from the input unit 10, the character data output from the voice recognition unit 12, and the coded voice data output from the voice coding unit 13 to the packetizing unit 15. Has a function. The voice coding unit 13 corresponds to voice coding means of the present invention, and the selector 14 corresponds to selection means of the present invention.

Further, the portable telephone according to the present embodiment
A packetizing unit 15, a packet restoring unit 20, a data sorting unit 21, a voice reading unit 22, and a voice decoding / reproducing unit 2
3, a synthesizing unit 24, and a speaker 25. The packetizer 15 adds the address of the other party to the character data or encoded voice data to be transmitted, converts the data into a packet, and sends the packet to the packet switching network via the baseband processor 3, RF unit 2, and antenna 1. The packet restoring unit 20 has a function of restoring a received packet to character data or encoded voice data. The packetizing section 15 includes a packet restoring section 20 in the packetizing means of the present invention.
Respectively correspond to the packet restoration means of the present invention.

The data distribution unit 21 takes in the character data or the encoded voice data restored by the packet restoring unit 20, and puts the character data on the display unit 30 and the voice reading upper part 22, and the encoded voice data. The output is distributed to the audio decoding / reproducing unit 23. Voice reading upper part 22
Has a function of outputting a voice signal for reading out the character data input from the data distribution unit 21 as voice,
The audio decoding / reproducing unit 23 has a function of decoding and reproducing the encoded audio data input from the data distribution unit 21. The synthesizing unit 24 synthesizes the audio signal output from the audio reading unit 22 and the audio signal output from the audio decoding / reproducing unit 23, and outputs the synthesized signal to the speaker 25 as audio output means. The data distribution unit 21 corresponds to the data distribution unit of the present invention, the voice reading upper part 22 corresponds to the voice reading unit of the present invention, and the voice decoding / reproducing unit 23 corresponds to the voice decoding / reproducing unit of the present invention. I do.

Further, the mobile phone according to the present embodiment
It has a display unit 30, a memory control unit 31, and a memory 32. The display unit 30 displays character data transmitted and received by packet transmission on a screen. The display unit 30 displays character data output from the voice recognition unit 12 and the data distribution unit 21.
And character data read from the memory. The display unit 30 corresponds to a display unit of the present invention.

The memory controller 31 controls writing and reading of data in the memory 32. Memory 32
The character data output from the voice recognition unit 12 and the data distribution unit 21 and the voice encoding unit 13 and the data distribution unit 2
1 is output from the memory control unit 31
Under the control of the input unit 10, read out in response to the operation of the input unit 10, and displayed on the screen of the display unit 30. The memory 32 corresponds to storage means of the present invention.

In the above configuration, in the portable telephone, voice recognition is performed by the voice recognition unit 12 on the voice signal input from the microphone 11 in the transmitting stage during a voice call,
When the voice recognition unit 12 succeeds in the voice recognition, the recognition result is output as character data to the display unit 30 to display the character data as the voice recognition result on the display unit, and to the packetizing unit 15 via the selector 14. Handover, voice recognition unit 1
If the speech recognition fails in step 2, the speech signal in the portion where the speech recognition failed is output to the speech encoding unit 13. The voice coding unit 13 converts the input voice signal into voice coded data and outputs it to the packetizing unit 15 via the selector 14.

The packetizing section 15 generates a packet to which identification information indicating the data type and the address of the other party are added depending on whether the data type is character data or encoded voice data, and performs baseband processing. Output to section 3. In the baseband processing unit 3, the packetizing unit 15
Is converted to a baseband signal and output to the RF unit 2. The RF unit 2 modulates the carrier with the baseband signal and transmits the modulated signal to a base station forming a packet switching network (not shown) via the antenna 1.

On the other hand, a packet of a communication partner is transmitted from a base station forming a packet switching network to an RF unit 2 via an antenna 1.
, The RF unit 2 converts the signal into a baseband signal and outputs the signal to the baseband processing unit 3. The baseband processing unit 3 converts the baseband signal into packet data and outputs the packet data to the packet restoration unit 20. The packet restoration unit 20 restores the received packet to character data or encoded voice data according to the identification information indicating the type of data included in the packet, and outputs the data to the data distribution unit 21. If the input data is character data, the data distribution unit 21 outputs the character data to the display unit 30 and the voice reading upper part 22, and if the input data is coded voice data, decodes the voice. Output to the playback unit 23.

When the data input to the data sorting unit 21 is character data, the character data of the received packet is displayed on the screen of the display unit 30 and the character reading unit 22 converts the character data into voice data. And outputs the audio signal to the synthesizing unit 24. When the data input to the data distribution unit 21 is encoded audio data, the audio decoding / reproduction unit 23
The encoded audio data is decoded, reproduced as an audio signal, and output to the synthesizing unit 24. The synthesizing unit 24 synthesizes audio signals output from the audio reading unit 22 and the audio decoding / reproducing unit 23 and outputs the synthesized audio signals to the speaker 25.

As described above, when transmitting and receiving packets, the display unit 30 displays the transmitted and received character data on the screen. In the display unit 30, there is the latest character data,
When the past character data is already displayed on the screen, by operating the input unit 10, the past character data can be scrolled to display the latest character data. It should be noted that a character or a symbol indicating the section where the speech recognition has failed in the speech recognition section 12 may be displayed in the section where the encoded speech data is used.

Further, in the portable telephone according to the present embodiment, in the transmitting stage, as means for inputting characters, character data is input by an input unit (for example, a keyboard) 10 in addition to voice recognition and voice recognition of a speaker. This allows character data to be transmitted in packets. This makes it possible to cope with a case where a person with a speech function disorder uses a mobile phone. In addition, by displaying characters on the display unit 30 at the receiving stage, it is possible to cope with a person with hearing impairment.

The transmitted / received character data is displayed on the display unit 3.
In addition to being displayed on the screen 0, the character data is simultaneously stored in the memory 32 under the control of the memory control unit 31 in the order of the latest character data up to a predetermined amount. When the user operates the input unit 10 during a call, desired character data can be called up on the screen and the content can be confirmed. The display unit 30 divides the screen into, for example, a plurality of screens, displays a screen displaying the latest information and past transmission / reception contents, and allows the user to operate the input unit 10 to scroll the screen.

The character data stored in the memory 32 may be automatically deleted at the end of the call, or may be held at a predetermined amount so that the contents of the call can be confirmed after the end of the call. May be. In the present embodiment, the encoded voice data is stored in the memory 32 together with the character data under the control of the memory control unit 31 when transmitting and receiving the packet. The user operates the input unit 10 to read out desired character data and coded voice data from the memory 30 and output these data to the voice reading unit 22 and the voice decoding / reproducing unit 23, whereby the synthesizing unit 2 is read.
4 and can be reproduced as audio by the speaker 25. As described above, in the present embodiment, audio data can be reproduced not only on the screen of the display unit 30 but also as audio.

In the present embodiment, it is assumed that mobile phones having a voice recognition unit at the transmission stage of each other have a telephone conversation. However, mobile phones of different types or telephones connected to a fixed line network are used. In such a case, a corresponding speaker-independent voice recognition means should be provided in the base station, or a gateway for providing voice recognition function and voice reading function connected between the circuit switching network and the packet switching network should be provided. You may.

As described above, according to the portable telephone according to the present embodiment, the audio signal input from the microphone in the transmitting stage is transmitted by character data having a smaller data amount than the encoded audio data. Therefore, it is possible to suppress the use amount of the line resource and reduce the charge for the user. In addition, according to the mobile phone according to the present embodiment, the required voice recognition unit is a specific speaker voice recognition unit that is easier to realize than an unspecified speaker voice recognition unit. It is high, and the amount of computation and computational performance of the CPU or DSP required for realization can be reduced.

Further, according to the portable telephone according to the present embodiment, the portion where the speech recognition failed in the speech recognition section is transmitted as coded speech data, so that even if the recognition rate is not 100%, the content of conversation can be reduced. Can be suppressed, and a practical voice call can be performed even with realistic voice recognition performance. In addition, according to the mobile phone according to the present embodiment, the history of the call contents is displayed on the screen and can be referred to by the user's operation, so that it is easy to check the contents of the conversation during the call, and a user-friendly voice call means is provided. Can be provided.

Further, according to the portable telephone according to the present embodiment, since the contents of a call can be recorded using character information having a smaller data amount than that of the encoded voice data, a long-time conversation can be performed with a memory having a small storage capacity. The contents of the call can be reproduced by recording the contents and reading the contents from the memory.
In addition, according to the mobile phone according to the present embodiment, since the contents of a voice call can be transcribed and displayed on a screen, and character data can be input and packet transmitted by an input unit such as a keyboard. People with hearing or hearing impairments can also talk to a person who makes a voice call.
(One can call with text and the other can call with normal voice)

[0047]

According to the first aspect of the present invention, during a call, the voice of the transmitting stage is recognized as a specific speaker's voice, the voice recognition result is converted into character data, and the character data is transmitted to a designated communication partner in a packet. When the speech recognition fails in the speech recognition, the character data and the recognition failure portion are converted into coded voice data, and the converted coded voice data is packeted to a designated communication partner. On the other hand, the reading of character data transmitted from a specific communication partner by packet transmission and the decoding and reproduction of encoded voice data are performed appropriately, so that the amount of line resources used and the charge to the user are reduced. This makes it possible to realize a mobile phone that is easy to use and is similar to a conventional voice call using circuit switching.

According to the invention described in claim 2, according to claim 1
In the mobile phone described in the above, character data transmitted and received by packet transmission is displayed on the screen,
It is easy to check the contents of the call, and the convenience can be improved.

According to the third aspect of the present invention, the voice signal input at the transmission stage during voice communication is recognized by voice,
Voice recognition means for converting to character data, voice coding means for converting a voice signal in a portion where voice recognition failed in the voice recognition means into coded voice data, character data output from the voice recognition means, and Selecting means for selectively outputting coded voice data output from the voice coding means to the packetizing means; and reading out the data according to the type of data restored by the packet restoring means or voice reading means. Data distributing means for distributing the data to the decoding / reproducing means, voice reading means for reading out the character data inputted from the data distributing means as voice, and decoding of the encoded voice data inputted from the data distributing means. Audio decoding / reproducing means for converting and reproducing, an audio signal output from the audio reading means and an audio signal output from the audio decoding / reproducing means Since it has a synthesizing means for synthesizing a voice signal and outputting it to a voice output means, it is possible to reduce the amount of line resources used and the charge to the user, and it is easy to use a portable telephone which is close to a conventional voice call by line switching. Can be realized.

According to the invention set forth in claim 4, according to claim 3,
Since the mobile phone described in (1) has display means for displaying character data transmitted and received by packet transmission on the screen, it is easy to check the contents of the call and to improve the convenience.

According to the invention described in claim 5, according to claim 3,
In the mobile phone according to any one of the first to fourth aspects, the specific speaker voice recognizing means in which a specific user's voice has been learned in advance is used as the voice recognizing means. It is possible to reduce the amount of computation and computational performance of the CPU or DSP required to realize the user voice recognition means. In addition, since the portion where the speech recognition has failed is transmitted as coded speech data, even if the speech recognition rate is not 100%, the loss of the conversation content is suppressed,
Practical voice calls can be realized even with realistic voice recognition performance.

According to the invention described in claim 6, according to claim 6,
The portable telephone according to any one of claims 4 and 5, further comprising a character input unit for inputting character data in a transmission stage, wherein the selection unit is provided with a character input unit. Any one of the output character data, the character data output from the voice recognition unit, and the encoded voice data output from the voice encoding unit is selectively output to the packetizing unit. As a result, the contents of the call can be transcribed and the character data can be displayed on the screen, and at the same time, the character data can be input by the character input means. It becomes possible to talk with.

According to the invention of claim 7, according to claim 6,
The mobile phone according to claim 1, further comprising a storage unit for storing character data to be transmitted and received by packet transmission, and an operation unit for designating various operations, and the character stored in the storage unit by operation of the operation unit. Since the data is read out and displayed on the display means, the contents of the conversation can be recorded by using character information having a smaller data amount as compared with the encoded voice data. Can be recorded and reproduced as audio.

According to the eighth aspect of the present invention, the encoded voice data is stored in the storage means in addition to the character data.
By reading these data by operating the operation means and reproducing the data as a voice signal by the voice reading means or the voice decoding / reproducing means, it is possible not only to confirm the character information on the screen but also to listen to the voice as voice. .

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a mobile phone according to an embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 antenna 2 RF unit 3 baseband processing unit 10 input unit 11 microphone 12 voice recognition unit 13 voice coding unit 14 selector 15 packetization unit 20 packet restoration unit 21 data distribution unit 22 voice reading unit 23 voice decoding / playback unit 24 synthesis unit 25 speaker 30 display unit 31 memory control unit 32 memory

Continued on the front page F term (reference) 5K027 AA11 HH20 5K067 AA34 AA41 BB04 BB21 CC08 DD53 DD54 EE02 EE16 EE25 FF02 FF23 FF26 GG01 GG11 HH23 5K101 LL12 NN07 NN08 NN18 SS07 SS08

Claims (8)

[Claims] 1. A portable telephone compatible with packet transmission, which recognizes a voice of a transmitting stage during a telephone call as a specific speaker's voice, converts the voice recognition result into character data, and transmits the character data to a designated communication partner. When the speech recognition fails in the speech recognition, the character data and the recognition failure portion are converted into encoded speech data, and the converted encoded speech data is transmitted to a designated communication partner in a packet. A mobile phone which transmits, and on the other hand, appropriately reads out character data transmitted from a specific communication partner by packet transmission and decodes and reproduces encoded voice data. 2. The mobile phone according to claim 1, wherein character data transmitted and received by packet transmission is displayed on a screen. 3. Packetizing means for adding a call destination address to character data or coded voice data to be transmitted, converting the data into a packet, and transmitting the packet to a packet switching network, and converting the received packet into character data or coded voice data. And a packet restoring means for restoring to a mobile phone,
Speech recognition means for recognizing a speech signal inputted in a transmission stage during a voice call and converting the speech signal into character data, and speech for converting a speech signal in a portion where speech recognition failed in the speech recognition means into encoded speech data. Encoding means; character data output from the voice recognition means and encoded voice data output from the voice encoding means; and selecting means for selectively outputting the packetized data to the packetizing means. Data distributing means for distributing the data to voice reading means or voice decoding / reproducing means in accordance with the type of the data, and voice reading means for reading character data input from the data distributing means as voice And audio decoding / reproducing means for decoding and reproducing the encoded audio data input from the data distribution means, and A mobile phone comprising: a synthesizing unit that synthesizes an output audio signal and an audio signal output from the audio decoding / reproducing unit and outputs the synthesized audio signal to an audio output unit. 4. The mobile phone according to claim 3, further comprising display means for displaying character data transmitted and received by packet transmission on a screen. 5. The mobile phone according to claim 3, wherein the voice recognition unit is a specific speaker voice recognition unit that has learned a specific user's voice in advance. 6. The transmitting stage further includes character input means for inputting character data, wherein the selecting means includes character data output from the character input means and character output from the voice recognition means. The data according to claim 4, wherein one of data and encoded audio data output from the audio encoding unit is selectively output to the packetizing unit. Mobile phone. 7. A storage device for storing character data to be transmitted and received by packet transmission, and an operation device for designating various operations, wherein the character data stored in the storage device is stored by the operation of the operation device. The mobile phone according to claim 6, wherein the mobile phone reads the data and displays the read data on the display unit. 8. The storage means stores encoded voice data in addition to the character data transmitted and received by packet transmission, and stores the character data or the character data stored in the storage means by operating the operation means. 8. The mobile phone according to claim 7, wherein the encoded voice data is read and reproduced as a voice signal by the voice reading means or the voice decoding / reproducing means.