JPH09284202A - Mobile radio telephone set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To record a coded voice signal being a voiced signal for a long time to a recording section by recording accessory information to the recording section when the coded voice signal to be recorded in the recording section is a silent. SOLUTION: A control section 14 that detects voice/silence information discriminated by a voice processing circuit section 3 discriminates a silence period of a coded voice signal to be recorded in a recording section 11. Then the coded voice signal discriminated to be in a silence period is not sent to a recording information generating section 16 as it is but the silence information is sent from the control section 14 to an accessory information generating section 15 and the accessory information generating section 15 generates accessory information denoting the silence state. Furthermore, a recording information generator separate section 16 generates recording information based on the accessory information and the voiced coded voice signal. That is, the coded voice signal for a period when discriminated to be silent is replaced with a signal with a comparatively short signal denoting the silent state and the resulting signal is recorded in the recording section 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital radio telephone, and more particularly to a mobile radio telephone having means for recording a voice signal transmitted from a call partner in a recording section for a long time.

[0002]

2. Description of the Related Art In recent years, a mobile radio communication system adopting a digital system has been proposed, and it is used for car phones, mobile phones, and mobile phones.
HS (Personal Handy Phone S
It is used in many fields, such as system. In addition, in a mobile radio system adopting a digital system, it is general practice to record an encoded digital voice signal as it is in a memory as a means for recording a call content for a long time in a small capacity memory.

For example, Japanese Laid-Open Patent Publication No. 7-143223 has an existing voice code decoding means. In a call state, a digital voice signal encoded by this voice code decoding means is decoded and recorded by a mode designating means. It is described that in the state in which the mode is designated, the encoded digital audio signal is not decoded, and the audio signal for a long time is stored in the memory of a small capacity by directly storing it in the storage means.

[0004]

The conventional mobile radio telephone is constructed as described above, and when the storage mode is designated, even if the encoded voice signal to be stored is in a silent state. However, if no processing is performed and the signal is stored in the recording unit as it is and the signal section in the silent state continues for a long time, it is almost impossible to store the coded voice signal in the voiced state having the voice signal.

Further, such a mobile radiotelephone is applied to a mobile communication system using a single coding system, and a plurality of coding systems are mixed and coded by each of these coding systems. In a system for making a call by using a voice signal (generally, the coding schemes of these mobile radio systems are configured into a single scheme (for example, the transmission rate is 20 ms / frame)), the transmission of these existing systems is performed. To further increase efficiency (eg 40 ms /
In order to change to a frame, not all base stations are exchanged at once for base stations having a compression method of 40 ms / frame, but several units are exchanged for base stations of 20 ms / frame for various reasons (1 In one system, multiple coding schemes coexist for a certain period of time), and conventional mobile radio telephones that can only be used for a single coding scheme could not support each coding scheme. For example, when the content of a call is stored while moving in the wireless zone of a base station using the coding method 1, the coding method 2
When moving into the wireless zone of the base station using the, the voice signal stored in the memory has a different encoding method on the way, and the call content stored in this way is decoded even when trying to reproduce it in the received voice. The means does not correspond, and only a part of the stored contents corresponding to the encoding method can be reproduced as the received voice.

In the field of these mobile radio telephones,
The ability to store long-term call contents in a small-capacity memory is extremely beneficial from the viewpoint of size reduction and weight reduction.

The present invention has been made to solve the above problems, and when an encoded audio signal is recorded in a memory, the encoded audio signal is replaced with the encoded audio signal when it is in a silent state. By storing auxiliary information indicating a silent state in a memory, a new mobile wireless telephone that can reduce the capacity of the memory for storing a voiced encoded voice signal and can store a voiced encoded voice signal for a long time The purpose is to provide.

Further, the coded voice signal for a long time can be stored in the memory, and the line quality of the coded voice signal when the stored coded voice signal is reproduced to the reception voice,
There is also provided a novel mobile radio telephone capable of notifying a user of the output of a received voice at an output level corresponding to a communication state such as a pseudo error rate or the communication state. Also,

[0009]

A mobile radiotelephone according to the present invention comprises a radio circuit section for receiving a modulated wave voice signal transmitted from a base station and demodulating it into an encoded voice signal. A voice processing circuit unit for decoding the coded voice signal demodulated by the radio circuit unit into a digital voice signal, and a reception corresponding to the modulated wave voice signal from the digital voice signal decoded by the voice processing circuit unit. A voice input / output unit that outputs a voice, a recording unit in which the encoded voice signal is recorded, and a recording unit that records the digital voice signal decoded by the voice processing circuit unit in the recording unit in accordance with a voiced or silent state. An adjunct information generation unit that generates adjunct information indicating the silence state of the encoded audio signal, and detects the digital audio signal, and records the encoded audio signal in the recording unit when the encoded audio signal is in the silence state. The accessory information generated by the auxiliary information generation unit in place of the coded speech signal of the silence is provided with a control unit for recording in the recording unit.

A mobile radio device according to the invention of claim 2 is
A radio circuit unit for demodulating a modulated wave voice signal received from a base station via a communication line into a coded voice signal, and a voice for decoding the coded voice signal demodulated by the radio circuit unit into a digital voice signal. A processing circuit unit, a voice input / output unit for outputting a received voice corresponding to the modulated wave voice signal from the digital voice signal decoded by the voice processing circuit unit, and the communication line of the communication line transmitted from the base station. An adjunct information generating unit that generates adjunct information indicating the communication state of the modulated wave audio signal based on line information, and a record that records the encoded audio signal to which the adjunct information generated by the adjunct information generating unit is added. Section, and when the encoded voice signal recorded in the recording section is reproduced to the received voice, the additional information recorded by being added to the encoded voice signal is read and reproduced. That identifies the communication state of the encoded speech signal, is provided with a control unit for adjusting the output level of the received voice reproduced in accordance with the identification result.

The control unit of the mobile radiotelephone according to the third aspect of the present invention causes the display unit to display the communication status of the encoded voice signal reproduced in the received voice.

A mobile radiotelephone according to the invention of claim 4 is provided with a radio circuit section for receiving a modulated wave voice signal transmitted from a base station and demodulating it into an encoded voice signal, and a plurality of decoding means. And a voice processing circuit unit for decoding the coded voice signal demodulated by the wireless circuit unit into a digital voice signal, and a voice input / output for outputting a received voice corresponding to the modulated wave voice signal from the digital voice signal. Section, an adjunct information generating section for generating adjunct information indicating the coding method of the coded audio signal from the coded information of the modulated wave audio signal transmitted from the base station, and the adjunct information is added. When the coded voice signal is read from the recording unit for recording the coded voice signal and reproduced as a received voice, the additional information recorded in addition to the coded voice signal is read to read the code. The attached information identifying section for identifying the encoding system of the audio signal, and the encoded audio signal recorded in the recording section by the predetermined decoding means according to the encoding system identified by the attached information identifying section A control unit for decoding the digital audio signal is provided.

The control unit of the mobile radio device according to the fifth aspect of the present invention selects, from the coded voice signals, a coded voice signal required for reproduction into a received voice and records the selected voice signal in the recording unit. It is a thing.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment. 1 Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 5. FIG. 1 is a block configuration diagram showing a schematic configuration of a mobile radio telephone according to the present invention, and FIG. 2 is a partial configuration diagram specifically showing a configuration of a control means shown in FIG. 1 and 2, 1 is a microphone unit for picking up a user's voice, 2 is an A / D converter for converting an analog voice signal picked up by the microphone unit 1 into a digital signal, and 3 is an A / D conversion The audio processing circuit unit 4 has a digital signal processing function of performing a coding process on the digital audio signal output from the device 2, a decoding process described later, and a desired digital signal process such as error code correction. A transmission side buffer circuit 5 for temporarily storing the encoded voice signal encoded by the processing circuit unit 3 and adjusting the transmission timing to a base station (not shown) is a code input via the transmission side buffer circuit 4. The digitally modulated audio signal is used as a modulation signal to perform digital modulation, and the antenna section 6 electrically connected.
From the base station (not shown) to transmit the modulated wave voice signal (hereinafter referred to as RF signal), and the RF signal (modulated wave reception signal) transmitted from the base station and received by the antenna unit 6 is encoded. A wireless circuit unit having a modulation / demodulation function for digitally demodulating a converted audio signal, and 7 a wireless circuit unit 5
The coded audio signal digitally demodulated by is temporarily stored, the timing for decoding the coded audio signal into a digital audio signal is adjusted, and the recording / playback of the coded audio signal with a recording unit described later is performed. A buffer circuit on the receiving side for adjusting the timing of each of the
A D / A converter for converting a digital voice signal decoded from a coded voice signal into an analog reception signal by means of 9, a voice input / output unit with the microphone unit 1, and an output from the D / A converter 9 to the outside. Is a speaker unit that outputs a received voice.

As a digital modulation method of the radio circuit section 5, π / 4 shift DQPSK (π / 4 shifted) is used.
differentially encoded q
uadrature phase shift key
ing) system is generally used, and the voice processing circuit unit 3 is used.
As an encoding processing method of VSELP (Vector
-Sum Excited Linear Predi
Active Coding) method, PSI-CELP
(Pitch Synchronous Innovat
ion-Code Excited Linear P
A data compression encoding method such as a redition method is used. The data encoded by these methods is PSI every 20 ms in the case of the VSELP method.
In the CELP system, each frame is transmitted at a transmission rate of 40 ms.

Further, 10 is a control means having an internal structure as shown in FIG. 2, which controls various operations of the mobile radiotelephone according to the present invention such as a call line allocation request to the base station, and 11 is a radio circuit section 5. A recording unit such as a memory for recording the digitally demodulated coded audio signal, 12 is a ten-key pad such as a dial key, and an operation unit for instructing recording / reproduction of the coded audio signal from the outside, 13 is a dial signal generator It is a display unit that displays the telephone number of the other party at the time of a call, and displays the communication status such as the line quality of the coded audio signal played when playing the recorded coded audio signal. It may be one that generates a corresponding notification sound.

Further, in FIG. 2, reference numeral 14 is composed of a microprocessor (hereinafter referred to as CPU), a ROM and a RAM, and the CPU has various control programs stored in these ROM or RAM (for wireless communication, for example). A control unit for controlling each part by a necessary program, a program necessary for recording / reproducing an encoded audio signal or a program for creating attached information described later), and 15 is a control unit 14 for controlling attached information creation, An adjunct information generation unit that creates adjunct information indicating a silent state based on voiced or silent information detected by the voice processing circuit unit 3 by the control unit 14 is a part that creates record information to be recorded in the recording unit. Then, the silent information section of the encoded voice signal digitally demodulated by the wireless circuit unit 5 is created by the attached information generation unit 15. Recording information creation separation having a function of replacing the recording information read from the recording unit 11 at the time of reproducing the recording information with the attached information indicating the silent state The unit 17 writes the recording information created by the recording information creating / separating unit 16 to the recording unit 11 in accordance with an instruction from the control unit 14, and the information recorded in the recording unit 11 is instructed by the control unit 14 when the recording information is reproduced. The recording information writing / reading unit 18 to be read out is read out by the recording information writing / reading unit 17, and the attached information separated from the corresponding encoded audio signal is input, and the attached information is added to the recording unit 11. It is an attached information identification unit for identifying the silent state of the recorded encoded audio signal.

Next, the operation will be described in detail with reference to FIGS. FIG. 3 is a flow chart showing the recording operation of the mobile radio telephone 19 according to the present invention shown in FIG.
3 is a flow chart showing a reproducing operation of recorded contents of the mobile wireless telephone 19. First, a recording operation of the mobile wireless telephone 19 according to the present embodiment, particularly a case of recording the call contents of the other party will be described with reference to FIG. . Regarding the call operation of the mobile wireless telephone 19 during a call, in the transmission system, the voice signal uttered by the user is first picked up by the microphone unit 1, and then the A / D converter 2, the voice processing circuit unit 3, the transmission side. The voice of the other party is transmitted in the order of the buffer circuit 4, the wireless circuit section 5, and the antenna section 6 and transmitted to the other party through the base station (not shown), and conversely in the receiving system, which is transmitted through the base station. Signal is mobile radio telephone 1
After being received by the antenna unit 6 of 9, the wireless circuit unit 5,
The reception side buffer circuit 7, the voice processing circuit unit 3, and the D / A converter 8 are transmitted in this order, and are output from the speaker unit 9 to the user of the mobile radio telephone 19. Then, this call operation is continued in the above manner until the communication is ended by the call end instruction.

When the user of the mobile radio telephone 19 records the call contents of the other party in the recording unit 11 in the above-mentioned call state, the user of the mobile radio telephone 19 first instructs the operation unit 12 in step 1a. Press the key to select the recording mode. When a key input for selecting the recording mode is made, the operation unit 12 outputs an operation signal to the control unit 14, here, a recording instruction signal for instructing a recording operation. In response to the recording instruction signal from the operation unit 12, the control unit 14 reads the recording control program stored in the ROM or RAM provided inside and executes the subsequent recording operation in addition to the call operation.

When the recording control program is executed by the control unit 14, the voice processing circuit unit 3 first determines in step 2a whether the coded voice signal digitally demodulated by the radio circuit unit 5 has a voiced state or a silence state from the digital voice signal. judge. The voice processing circuit unit 3 not only determines the voiced state or the silence state of the encoded voice signal decoded into the digital voice signal, but also determines how much the silence state continues. Then, the control unit 14 that has detected the voiced / non-voiced information determined by the voice processing circuit unit 3 executes the recording unit 1 in step 3a.
The silent section of the encoded audio signal to be recorded in 1 is determined. Here, the encoded voice signal determined to be the voiced section is transmitted to the recording information creation / separation unit 16 as it is, but the encoded voice signal determined to be the silent section is directly recorded to the recording information creation / separation unit 16. First, the silent information is sent from the control unit 14 to the adjunct information generating unit 15, and the adjunct information generating unit 15 creates adjunct information indicating a silent state in step 4a. Then, the attached information indicating the silent state is sent to the recorded information creating / separating unit 16 and the recording information creating / separating unit 16 creates the recorded information from the attached information and the voiced coded audio signal. That is, when the silent encoded audio signal is recorded in the recording unit 11 as it is, when the silent signal section is long, the recording allowable amount of the voiced signal is reduced, so that the code of the section determined to be silent is coded. The encoded voice signal is replaced with a signal having a relatively short data length indicating the silent state and recorded in the recording unit 11. Then, the recording information created by the recording information creating / separating unit 16 is output to the recording information writing / reading unit 17, for example, as shown in FIG.
It is recorded in the recording unit 11 by the recording information writing / reading unit 17 whose writing timing is adjusted by 4.

FIG. 5 is an example of the record information created by the record information creating / separating unit 16 and recorded in the recording unit 11, and is a data structure diagram showing the data structure of the record information.
The recording unit 11 records the encoded audio signal 20 of n frames (n is an integer of 1 or more) and the recording information in which the encoded data of the 4th to 9th frames is replaced with the attached information 21. Further, in FIG. 5, the attached information 20 is created and replaced for each encoded data of one frame unit, but it may have a data structure in which several frames are collectively replaced.

The attached information created by the attached information generator 15 is created by combining 0 and 1 data, and can be replaced with a silent coded audio signal by using only a few bits of data. .

Step 6a is a step in which the control unit 14 monitors the amount of data recorded in the recording unit 11 by the recording information writing / reading unit 17, and the recording unit 11 stores a data amount of a predetermined value or more in the recording unit 11. When recorded, the control unit 14 forcibly ends the recording operation. Further, step 7a is performed by the control unit 14
Is a step of monitoring a recording stop signal from the operation unit 12, and the user of the mobile radiotelephone 19 performs a key input to select the recording stop mode by the operation unit 12, and the operation unit 1
When the recording stop signal is input from 2 to the control unit 14, the control unit 14 forcibly ends the recording operation as in step 6a. As described above, according to the mobile radiotelephone of the present invention related to the present embodiment, when the content of the call spoken by the other party is recorded in the recording unit 11, the silent section of the received encoded voice signal is long. When continuing, the additional information indicating the silence state is recorded in the recording unit 11 instead of the silence encoded audio signal, so that the capacity of the recording unit 11 for recording the silence signal can be reduced, A voiced encoded audio signal can be recorded in the recording unit 11 for a long time.

Next, the reproducing operation will be described with reference to FIG. When the user of the mobile wireless telephone 19 according to the present embodiment confirms the call content recorded in the recording unit 11 in the manner shown in FIG. 3, first, the user selects the reproduction mode for the operation unit 12 in step 1b. Enter the key. When the operation unit 12 receives a key input for selecting the reproduction mode, the control unit 14
A reproduction instruction signal is output to. In response to the reproduction instruction signal from the operation unit 12, the control unit 14 reads the reproduction control program stored in the ROM or RAM provided inside and executes the subsequent reproduction operation.

When the reproduction control program is executed by the control unit 14, the recording information writing / reading unit 17 first reads the recording information from the recording unit 11 in step 2b according to an instruction from the control unit 14. The record information read by the record information writing / reading unit 17 is composed of the voiced encoded voice signal and the silent additional information as described above, and the record information creation / separation unit 16 indicates the silence in step 3b. The auxiliary information and the voiced encoded voice signal are separated. One of the separated genus information is transmitted to the attached information identification unit 18 by the recorded information creation / separation unit 16, and the attached information identification unit 18 identifies the silent state in step 4b. And
The identified result is sent to the control unit 14 and is returned to the silent coded audio signal again, and then the receiving side buffer circuit 7 together with the other voiced coded audio signal separated by the recording information creation / separation unit 16. Is transmitted to the voice processing circuit unit 3 via
The voice processing circuit unit 3 decodes these encoded voice signals in step 5b. The record information recorded in the recording unit 11 as described above is decoded and then reproduced as a received voice through the D / A converter 8 and the speaker unit 9.

Further, step 6b is a step in which the control section 14 monitors the reading of the record information by the record information writing / reading section 17, and when all the record information is read from the recording section 11, the control section 14 forcibly reproduces. The operation ends. Also,
Step 7b is a step in which the control unit 14 monitors the reproduction stop signal from the operation unit 12. The user of the mobile radio telephone 19 performs a key input to select the reproduction stop mode by the operation unit 12, and the operation unit 12 controls When the reproduction stop signal is input to the unit 14, the control unit 14 forcibly ends the reproduction operation as in step 6a.

Embodiments 2 Next, another embodiment of the present invention will be described. In the above embodiment, by replacing the silent coded audio signal with the attached information, the recording capacity of the silent coded audio signal to the recording unit is reduced, and the necessary voiced coded audio signal is recorded in the recording unit for a long time. Has been recorded, but this attached information is
Since only a few bits of data can indicate, for example, the silence state of the encoded voice signal, other information such as the line quality of the encoded voice signal to be recorded in the recording unit 11 is created as attached information, and the encoded voice signal is generated. It may be recorded in the recording unit 11 together with the recording. By doing so, information such as line quality can be recorded in the same recording unit as the encoded voice signal without providing an extra memory, and the encoded voice signal can be encoded at the time of reproduction. Information about the line quality of the audio signal can be displayed on the display unit 12, for example.

Generally, in the case of a mobile communication system in which a wireless communication line is set up, a base station for allocating a communication line is provided to each terminal which is connected to the wireless communication line and is communicating with the other party. The line quality of the line being called and the pseudo error rate are transmitted. In addition, when each terminal in a call by such a wireless line records the contents of the other party's conversation in an internal memory, the communication state with these other parties is not considered, and the communication state is poor. Was recorded as it was, and when the recorded contents were reproduced later, the recorded contents could not be heard if the line quality was poor. The mobile radio telephone according to the present embodiment creates ancillary information indicating the line quality, pseudo error rate, etc. of the telephone line in use and records the encoded voice signal digitally demodulated by the radio circuit unit in the recording unit. By adding and recording this additional information, the encoded audio signal recorded in the recording unit is decoded at the time of reproduction, and the corresponding encoded audio signal is added from the additional information added to the decoded encoded audio signal. The communication state of the signal is read, and the output level of the reproduced received voice is adjusted according to the communication state.

FIG. 6 is a block diagram showing the configuration of the mobile radio telephone according to this embodiment. The operation of the mobile radio telephone according to this embodiment will be described with reference to FIG. In the drawings, the same reference numerals indicate the same or corresponding parts, and detailed description thereof will be omitted. In addition, the control unit 14 of the mobile radio telephone according to the present embodiment does not cause the attached information generation unit 15 to create attached information based on the voiced / silent information detected by the voice processing circuit unit 3, but sets the wireless circuit unit 5 to operate. The auxiliary information generation unit 1 based on the control signal indicating the communication state of the communication line received via
The operation program that creates the attached information in 5
In the M or RAM, when the user inputs a key to select the recording mode using the operation unit 12, an operation of creating the auxiliary information based on the control signal is performed. That is, in the mobile radio telephone according to the present embodiment, when the recording mode is selected by the operation unit 12, the control unit 14 first causes the accessory information generation unit 15 to create the accessory information based on the control signal, and then the record information creation separation. The section 16 adds the additional information created by the additional information generating section 15 to the encoded audio signal to be recorded in the recording section 11 to create the recording information, and finally the recording information writing / reading section 17 controls this recording information by the control section. It records in the recording part 11 according to the recording timing instruction of 14.

FIG. 7 is a data structure diagram showing the data structure of the record information recorded in the recording section of the mobile radiotelephone according to this embodiment. In FIG. After being decoded by the circuit unit 3, an encoded voice signal is output from the speaker unit 9 to the user as a received voice, and 22 is the encoded voice signal 2
It is attached information added to 1 and recorded in the recording unit 11. This attached information indicates the line quality of the call line set between the mobile radio telephone according to the present embodiment and the call partner (for example, a good state is set to 1 and a poor state is set to 3). However, in addition, information indicating various communication states during a call such as a pseudo error rate may be used. Further, the attached information shown in FIG. 7 is added to each encoded voice signal of one frame, and the line quality is shown for each encoded voice signal of each frame. If you create additional information on the, you can further reduce the recording capacity,
Effective use of memory can be achieved.

Then, at the time of reproduction, the encoded voice signal 21 to which the attached information 22 is added is read from the recording unit 11, decoded by the voice processing circuit unit 3 and further digitally processed, and the control unit 14 carries out this attached information. By adjusting the output level of the voice input / output unit based on the communication state of the encoded voice signal 21 identified from 22 (the reception voice level instruction signal according to the content of the attached information is transmitted from the control unit 14 to the voice input / output unit). However, even if the call contents of the other party, which was recorded when the line quality was poor, can be played back as the received voice in an easy-to-understand state.

Further, in the mobile radio device according to the above embodiment, for example, when it is determined that the recording is performed in a state in which the line quality is poor, the output level of the received voice is automatically increased and the reproduced received voice is output. Also becomes larger than when the output level is low. Further, since the output level is automatically adjusted, the user of the mobile radio telephone cannot know whether the recorded coded voice signal has a good communication condition, and cannot identify the place where the communication condition is bad. This may lead to repeated recording in places with poor call conditions, using rechargeable batteries such as secondary batteries as the power supply unit, and
In the field of this mobile radiotelephone, which is always used, it consumes extra power and is not desirable. Therefore, the output level of the received voice reproduced at the time of reproducing the recorded content may be adjusted, and the communication state of the encoded voice signal identified from the attached information may be displayed on the display unit 13. In this case, the display means of the display unit 13 may be a display unit of a liquid crystal screen that displays the dialed number of the other party at the time of calling, or may be provided with a notification sound voicing unit that utters a notification sound according to the communication state. Good.

Embodiment. 3 Next, another embodiment of the present invention will be described with reference to FIGS. The mobile radiotelephone according to the present embodiment is applied to a mobile communication system in which a plurality of encoding methods are used together. In the mobile radiotelephone according to the present embodiment, an encoded voice signal recorded in a recording unit is used. At the time of reproduction, in order to realize accurate reproduction according to the encoding system of each encoded audio signal, auxiliary information indicating each encoding system is created. Then, this additional information is added to the corresponding encoded audio signal and recorded in the recording unit, and at the time of reproduction, the encoding system identified from this additional information is selected and the encoded audio signal recorded in the recording unit is decoded. .

FIG. 8 is a block configuration diagram showing a schematic configuration of the mobile radiotelephone according to the present embodiment, and FIG. 9 is a partial configuration diagram specifically showing the configuration of the control means. 8 and 9
23, a plurality of encoding means 23a, 23b and decoding means 23c, 23d (for example, the scheme 1 is VSELP).
Method, method 2 is a PSI-CELP method), and during a call, an encoding means and a decoding means, which are the same encoding method as the base station forming the wireless communication line set with the other party, are selected. The voice processing circuit section 24 is internally configured as shown in FIG. 9 and is used for allocating a voice communication line when a base station sets up a wireless communication line (Common Signaling Channel).
l: Hereinafter referred to as CSC. ), The control signal including the signal designating the encoding method transmitted from the base station is set between the encoding means and the decoding means of the voice processing circuit unit 3 with the communication partner. Select the same encoding method as the base station that constitutes the communication line, and select the operation unit 1
The control unit 25 performs a series of operation control for recording the encoded audio signal digitally demodulated by the wireless circuit unit 5 in the recording unit 11 in response to the recording instruction signal from 2, and 25 is instructed to the recording unit 11 by the instruction from the control unit 24. An adjunct information generation unit that creates adjunct information indicating the encoding method of the encoded audio signal to be recorded, 26
Adds the attached information generated by the attached information generating unit 25 to the encoded voice signal to be recorded in the recording unit 11 to create record information, and the record information read from the recording unit 11 is converted into the encoded voice signal and the attached information. Record information creation separation unit to separate into
Reference numeral 27 is a recording information writing / reading unit that writes the recording information created by the recording information creating / separating unit 26 into the recording unit 11 or reads the recording information recorded in the recording unit 11 according to an instruction from the control unit 24, and 28 is the recording information. The attached information read out by the writing / reading unit 27 and separated from the encoded voice signal is input, and the attached information identification unit for identifying the encoding system of the encoded voice signal recorded in the recording unit 11 from this attached information. Is.
In the drawings, the same reference numerals indicate the same or corresponding parts, and detailed description thereof will be omitted.

FIG. 11 is a system configuration diagram showing a mobile communication system in which the mobile radiotelephone 29 according to this embodiment shown in FIG. 8 is used. A plurality of base stations are provided in the line control station 30 connected to the public line network. Kn (n is an integer of 1 or more.)
Are connected to each other to form a communication area 31 including a plurality of wireless zones En (n is an integer of 1 or more). Further, in FIG. 11, it is assumed that the base station K1 adopts the VSELP method and the base station K2 adopts the PSI-CELP method, respectively, and the mobile radio telephone 29 first uses the wireless zone A formed by the base station K1. At the point, a call is made with the other party on the call line T1, and then, while continuing the call, moving to the point B of the wireless zone formed by the base station K2 (at the point b, the call is made by the call line T2). Is shown.

Next, the operation will be described in detail with reference to FIGS. 11 to 13. FIG. 11 is a flow chart showing the recording operation of the mobile wireless telephone 29 according to the present embodiment shown in FIG. 8, and FIG. 12 is a flow chart showing the reproducing operation of the recorded contents. First, the recording operation of the mobile wireless telephone 29. Will be described with reference to FIG. Note that FIG.
The flowchart shown in FIG.
In the state shown in 0, the contents of the call that the other party has spoken are recorded in the recording unit 11
The operation when recording is shown in FIG. At the point A, when the user of the mobile radiotelephone 29 who is talking with the communication partner through the communication line T1 records the communication content of the communication partner in the recording unit 11, first, the user uses the recording mode for the operation unit 12. Enter the key to select (Step 1
c). When a key input for selecting the recording mode is made, the operation unit 12 outputs a recording instruction signal for instructing the recording operation to the control unit 24. When the recording instruction signal is input from the operation unit 12, the control unit 24 reads the recording control program stored in the ROM or RAM provided inside and executes the subsequent recording operation in addition to the call operation.

When the control unit 24 executes the recording control program by selecting the recording mode, the control unit 24 first determines the encoding system of the encoded audio signal digitally demodulated by the wireless circuit unit 5 (step 2c). In the mobile radiotelephone 29 according to the present embodiment, the coding system is determined based on the coding system designation signal included in the control signal transmitted from the base station via the CSC. Even when the wireless communication line is switched, the coding method used by the base station forming the wireless communication line switched when the new wireless communication line is set can be determined. Then, the control unit 24 first causes the attached information generation unit 25 to create attached information according to the determination result, and then adds the attached information indicating this encoding method to the encoded audio signal in the recording information creation / separation unit 26. Let you create record information,
Finally, the recording information writing / reading unit 27 writes this recording information in the recording unit 11 (step 3c). Further, step 4c is a step in which the control unit 24 monitors the amount of data recorded in the recording unit 11 by the recording information writing / reading unit 27, and the recording unit 11 records the data amount of a predetermined value or more. Then, the controller 24 forcibly ends the recording operation. Step 5c is a step in which the control unit 24 monitors the recording stop signal from the operation unit 12, and the mobile radio telephone 2
When the user of 9 performs the key input for selecting the recording stop mode by the operation unit 12 and the recording stop signal is input from the operation unit 12 to the control unit 24, the control unit 24 performs the recording operation as in step 4c. Is forced to end.

Step 6c is a step for monitoring the switching of the wireless communication line, and when the wireless communication line T1 set up with the other party is switched to the wireless communication line T2 by the movement of the mobile wireless telephone 29, The control unit 24 returns to step 2c, and again determines the coding method used by the base station K2 forming the switched wireless communication line T2 based on the control signal transmitted from the base station K2 via the CSC. If the wireless communication line T1 is not switched, steps 3c to 5c are continued until recording is completed. The wireless communication line between the mobile wireless telephone 29 and the other party at the position of point c in FIG. 10 can be set to either T1 or T2, but normally the line control station 30 to which each base station is connected. The (network side) monitors the channel use state of each base station, for example, the traffic state, and which radio communication line should be connected to, depending on the judgment of this network side, moves through the base station K1 or the base station K2. Wireless phone 2
9 is instructed. This instruction is given by the control signal via the CSC. In addition, each base station detects the radio field intensity of the transmission signal transmitted from the mobile radio telephone 29 to each base station K1 or K2, and instructs the base station having the strong radio field intensity to connect to the radio communication line. May be. FIG.
FIG. 3 is a data structure diagram showing a data structure of record information recorded in the recording unit 11 as described above.

In FIG. 13, reference numeral 32 is an encoded audio signal of n frames (n is an integer of 1 or more) recorded in the recording section 11 separately for each frame, and 33 is an encoded audio signal 3.
It is attached information added to 2. In FIG. 13, V is VSE
LP system and P represent PSI-CELP system. As shown in FIG. 12, the attached information 33 indicating the encoding method is added to each encoded audio signal of one frame.

FIG. 14 is a data structure diagram showing another data structure of the record information recorded in the recording section 11. In FIG. 13, the attached information is created for each frame and added to the encoded audio signal of each corresponding frame. However, when the encoding system changes as a result of the identification of the encoding system by the control unit 24, that is, When the wireless communication line is switched to the communication line of the base station using another encoding method (when the position of the mobile wireless telephone 29 moves from point a to point c as shown in FIG. 10), the beginning The additional information may be added only to the encoded audio signal of the frame. Note that FIG.
Among them, K indicates an encoding method, and this encoding method K is K + 1.
When it is switched to, the additional information P corresponding to the encoding method is added.

Next, the reproducing operation will be described with reference to FIG. When the user of the mobile radiotelephone 29 according to the present embodiment confirms the call contents recorded in the recording unit 11 in the manner shown in FIG. 11, the user first makes a key input to the operation unit 12 to select a reproduction mode. (Step 1d). Operation unit 1
2 outputs a reproduction instruction signal to the control unit 24 when a key input for selecting a reproduction mode is made. In response to the reproduction instruction signal from the operation unit 12, the control unit 24 reads the reproduction control program stored in the ROM or RAM provided inside and executes the subsequent reproduction operation.

When the reproduction control program is executed by the control unit 24, the recording information writing / reading unit 27 first causes the control unit 2 to operate.
According to the instruction of No. 4, the recording information shown in FIG. 13 is read from the recording unit 11, for example. Next, the read record information is separated by the record information creating / separating unit 26 into the attached information 33 indicating the encoding system and the encoded audio signal 32 of the encoding system shown in the attached information 33. One of the separated encoded audio signals 32 is transmitted to the audio processing circuit section 3 via the receiving side buffer circuit 7 and is decoded into a digital audio signal by a selected decoding means which will be described later. The means is selected based on the identification of the attached information by the attached information identification unit 28. That is, the attached information identification unit 28 identifies the encoding system from the other attached information 33 separated by the recording information creation / separation unit 26, and the control unit 24 separates one encoded voice according to the identification result. Decoding means corresponding to the signal coding method is selected (step 2d).
The selection of the decoding means is performed by the control unit 24 outputting a coding method selection signal to the audio processing circuit unit 3.
Then, one of the encoded audio signals 32 separated by the recording information creation / separation unit 26 is decoded into a digital audio signal by the decoding means selected by the control unit 24 (in FIG. 13, code data 1 and 2 is decoded by the VSELP system, and the encoded data n is decoded by the PSI-CELP system). The digital audio signal decoded by the selected decoding means is then reproduced as a received voice through the D / A converter 8 and the speaker unit 9 (step 3d).

Further, step 4d is a step in which the control section 24 monitors the reading of the record information by the record information writing / reading section 27, and when all the record information is read from the recording section 11, the control section 24 forcibly reproduces. The operation ends. Also,
Step 5d is a step in which the control unit 24 monitors the reproduction stop signal from the operation unit 12, and the user of the mobile radiotelephone 29 according to the present embodiment performs key input to select the reproduction stop mode by the operation unit 12, When a reproduction stop signal is input from the operation unit 12 to the control unit 24, the control unit 24
Terminates the reproducing operation forcibly as in step 4d.

Embodiment. 5 In the mobile radio telephone according to the above-described embodiment, all the encoded voice signals digitally demodulated by the radio circuit unit 5 are recorded in the recording unit 11, but it is necessary for decoding when recording in the recording unit. Data (A class) and other data (B class: data related to sound quality) may be distinguished, and only the data of this A class may be selected and recorded in the recording unit 11 (memory saving mode). . For example, when the user gives a recording instruction from the operation unit 12, the memory saving mode can be selected at the same time. If this is done, the received voice during playback will deteriorate somewhat, but the recording unit 1
The recording capacity of the encoded audio signal recorded in 1 can be reduced,
Further, the encoded audio signal for a longer time can be recorded in the recording unit 11.

FIG. 15 is a data structure diagram showing the data structure of the record information recorded in the recording unit 11 of the mobile radiotelephone according to the present embodiment, 34 is the record information recorded in the normal time, and 35 is the memory saving mode. 5 shows the recording information recorded in the recording unit 11 when is selected by the operation unit 12. When the memory saving mode is selected as shown in FIG. 15, only the A-class encoded data is recorded in the recording unit 11.

[0046]

As described above, according to the first aspect of the present invention, a radio circuit section for receiving a modulated wave voice signal transmitted from a base station and demodulating it into an encoded voice signal, and this radio circuit section. A voice processing circuit unit for decoding the coded voice signal demodulated by the circuit unit into a digital voice signal, and a received voice corresponding to the modulated wave voice signal from the digital voice signal decoded by the voice processing circuit unit. An audio input / output unit for outputting, a recording unit for recording the encoded audio signal, and a recording unit for recording the digital audio signal decoded by the audio processing circuit unit in the recording unit in accordance with a sound or no sound state. An adjunct information generation unit that generates adjunct information indicating a silent state of the encoded voice signal, and the attached information when the encoded voice signal that detects the digital audio signal and is recorded in the recording unit is in the silence state. Since the control unit that records the attached information generated by the composition unit in the recording unit instead of the encoded audio signal of silence is provided, the received encoded audio signal of silence is replaced by the attached information indicating silence. Is recorded in the recording unit, and only the voiced coded audio signal is recorded in the recording unit as it is, so that the recording capacity of the voiceless coded audio signal in the recording unit can be reduced and the voice recording in the recording unit can be suppressed for a long time. The encoded audio signal can be recorded.

According to the second aspect of the present invention, the radio circuit section for demodulating the modulated wave voice signal from the base station received via the communication line into the encoded voice signal, and the radio circuit section are provided. A voice processing circuit unit for decoding the demodulated coded voice signal into a digital voice signal, and a voice for outputting a received voice corresponding to the modulated wave voice signal from the digital voice signal decoded by the voice processing circuit unit. An input / output unit, an attached information generation unit that generates attached information indicating the communication state of the modulated wave audio signal based on the line information of the communication line transmitted from the base station, and the attached information generation unit. A recording unit for recording the encoded audio signal to which the attached information is added, and a recording unit for adding the encoded audio signal recorded in the recording unit to the encoded audio signal when reproducing the received voice. And a control unit for identifying the communication state of the coded voice signal to be reproduced by reading the attached information recorded by the above and adjusting the output level of the received voice reproduced according to the identification result. Therefore, it is possible to record a long-term conversation content in the recording unit, and to adjust the output level of the received voice corresponding to the line quality and the pseudo error rate of the coded voice signal recorded when reproducing the recorded information in the recording unit. Can be adjusted.

According to the third aspect of the present invention, the control section causes the display section to display the communication state of the encoded voice signal reproduced in the received voice, so that the recorded information is recorded during reproduction. The line quality of the encoded voice signal, the pseudo error rate, etc. are displayed or reported to the user, and the communication state at the recorded position can be recognized.

Further, according to the invention of claim 4, a radio circuit section for receiving the modulated wave voice signal transmitted from the base station and demodulating it into an encoded voice signal, and a plurality of decoding means are provided. A voice processing circuit unit for decoding the encoded voice signal demodulated by the wireless circuit unit into a digital voice signal,
A voice input / output unit that outputs a received voice corresponding to the modulated wave voice signal from the digital voice signal, and a code of the coded voice signal from the coded information of the modulated wave voice signal transmitted from the base station. When the encoded voice signal is read from the attached information generation unit that generates the attached information indicating the encoding system and the recording unit that records the encoded voice signal to which the attached information is added, and reproduces the received voice, According to the attached information identification unit that reads out the attached information recorded in addition to the encoded voice signal and identifies the encoding system of the encoded voice signal, and the encoding system identified by the attached information identification unit Since the control section for decoding the coded voice signal recorded in the recording section by the predetermined decoding means into the digital voice signal is provided, the communication line may be changed to another group while recording the call contents. Even when a plurality of types of encoded voice signals encoded by different encoding systems are recorded after switching to the station line, each encoded audio signal is decoded by the decoding means corresponding to the encoding system and the recorded contents Can be continuously reproduced and the encoded audio signal can be recorded in the recording section for a long time.

According to the fifth aspect of the present invention, the control section selects, from the coded voice signals, a coded voice signal required for reproduction into a received voice and records it in the recording section. Therefore, the recording capacity of the encoded audio signal recorded in the recording unit can be further reduced, and the encoded audio signal for a long time can be recorded in the recording unit 1.
1 can be recorded.

[Brief description of drawings]

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

2 is a block diagram showing a control means of the mobile radio telephone shown in FIG. 1. FIG.

FIG. 3 is a flowchart showing a recording operation of the mobile radio telephone shown in FIGS. 1 and 2.

FIG. 4 is a flowchart showing a reproducing operation of the mobile radio telephone shown in FIGS. 1 and 2.

5 is a data structure diagram of recorded information recorded in a recording unit of the mobile radiotelephone shown in FIGS. 1 and 2. FIG.

FIG. 6 is an embodiment of the present invention. 2 is a block diagram showing a control means of the mobile radiotelephone set according to FIG.

7 is a data structure diagram of recorded information recorded in a recording unit of the mobile wireless telephone shown in FIG.

FIG. 8 shows an embodiment of the present invention. FIG. 3 is a block diagram showing a mobile radio telephone according to No. 3.

9 is a block diagram showing the control means of the mobile radio telephone shown in FIG.

10 is a system configuration diagram showing a mobile communication system to which the mobile radio telephones shown in FIGS. 8 and 9 are applied.

FIG. 11 is a flowchart showing a recording operation of the mobile wireless telephone shown in FIGS. 8 and 9.

FIG. 12 is a flowchart showing a reproducing operation of the mobile radio telephone shown in FIGS. 8 and 9.

FIG. 13 is a data structure diagram of recorded information recorded in a recording unit of the mobile wireless telephone shown in FIGS. 8 and 9.

FIG. 14 is another data configuration diagram of the record information recorded in the recording unit of the mobile radiotelephone set shown in FIGS. 8 and 9.

FIG. 15 is a data configuration diagram of record information recorded in the recording unit of the mobile wireless device according to the present invention when the memory saving mode is selected.

[Explanation of symbols]

 3, 23 voice processing circuit section 5 wireless circuit section 9 speaker section 10 control means 11 recording section 12 operation section 13 display section 14, 24 control section 15, 25 accessory information generating section 18, 28 accessory information identifying section

Claims (5)

[Claims] 1. A radio circuit unit for receiving a modulated wave voice signal transmitted from a base station and demodulating it into an encoded voice signal, and the coded voice signal demodulated by this radio circuit unit into a digital voice signal. A voice processing circuit unit for decoding, a voice input / output unit for outputting a received voice corresponding to the modulated wave voice signal from the digital voice signal decoded by the voice processing circuit unit, and the coded voice signal are recorded. And a recording unit, and ancillary information for generating ancillary information indicating the silence state of the encoded audio signal to be recorded in the recording unit according to the sound or silence state of the digital audio signal decoded by the audio processing circuit unit. The generation unit and the digital audio signal are detected, and when the encoded audio signal to be recorded in the recording unit is in the silent state, the additional information generated by the additional information generation unit A mobile radiotelephone comprising: a control section for recording in the recording section instead of the encoded voice signal. 2. A radio circuit unit for demodulating a modulated wave voice signal from a base station received via a telephone line into a coded voice signal, and a digital voice for the coded voice signal demodulated by the radio circuit unit. A voice processing circuit unit for decoding into a signal,
The voice input / output unit for outputting the received voice corresponding to the modulated wave voice signal from the digital voice signal decoded by the voice processing circuit unit, and the line information of the communication line transmitted from the base station An adjunct information generating section for generating adjunct information indicating the communication state of the modulated wave audio signal, a recording section for recording the encoded audio signal to which the adjunct information generated by the adjunct information generating section is added, and the record. When the coded audio signal recorded in the section is reproduced into the received voice, the communication state of the coded audio signal which is reproduced by reading the attached information added to the coded audio signal and recorded is identified. A mobile radiotelephone, further comprising a control unit for adjusting the output level of the received voice reproduced according to the identification result. 3. The mobile radio telephone according to claim 2, wherein the control unit causes the display unit to display the communication state of the encoded voice signal reproduced in the received voice. 4. A radio circuit unit for receiving a modulated wave voice signal transmitted from a base station and demodulating it into an encoded voice signal, and a plurality of decoding means are provided, and the code demodulated by the radio circuit unit. A voice processing circuit section for decoding the encoded voice signal into a digital voice signal, a voice input / output section for outputting the received voice corresponding to the modulated wave voice signal from the digital voice signal, and the received voice signal transmitted from the base station. From the coded information of the modulated wave audio signal, an adjunct information generation unit that generates adjunct information indicating the coding method of the coded audio signal, and a recording unit that records the coded audio signal to which the adjunct information is added When the encoded voice signal is read and reproduced as the received voice, the attached information information added to the encoded voice signal and recorded to read out the attached information identification for identifying the encoding system of the encoded voice signal. A separate unit and a control unit for decoding the coded audio signal recorded in the recording unit by the predetermined decoding unit according to the encoding system identified by the attached information identifying unit into the digital audio signal. A mobile radio telephone characterized in that 5. The controller controls the encoded voice signal,
The mobile radio telephone according to claim 1, 2, or 4, wherein an encoded voice signal required for reproduction into a received voice is selected and recorded in the recording unit.