JP2009204815A - Wireless communication device, wireless communication method and wireless communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tolerant wireless communication device capable of continuing telephone call without breaking voice even when a bandwidth required for voice over IP (VoIP) communication is not secured, and to provide a wireless communication method and a wireless communication system. <P>SOLUTION: The wireless communication device comprises: a voice input section; a voice pattern analysis section; a transmitting section for transmitting a code related to a voice pattern; a first storage section for storing a plurality of voice patterns and codes; an output section for outputting voice transmitted from another wireless communication device; an acquiring section for acquiring the voice pattern and code transmitted from another wireless communication device; a second storage section for storing the acquired voice pattern and code; and a control section which controls the transmitting section so that a code related to the voice pattern stored in the first storage section, which corresponds to the voice pattern of newly input voice may be transmitted, and which controls the output section so that voice by the voice pattern stored in the second storage section, which the acquired code is related, may be output. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a wireless communication device, a wireless communication method, and a wireless communication system. More specifically, even when a bandwidth required for a VoIP call cannot be secured due to deterioration of a propagation environment, the call can be continued. The present invention relates to a highly resistant wireless communication device, a wireless communication method, and a wireless communication system.

  VoIP (Voice over Internet Protocol), which performs voice communication based on IP (Internet Protocol), transmits voice data as RTP packets according to a real-time transport protocol (RTP). In VoIP, an audio codec that compresses digitized audio data is used to efficiently use the limited bandwidth of the network. Typical voice codecs used in VoIP include G729 recommended by ITU-T (International Telecommunications Union-Telecommunications Standardization Sector).

  In the G729 codec method, a voice signal input on the transmission side is divided into 10 ms worth of voice signals (voice waveforms), and the divided voice waveforms are compared with a plurality of given voices. Then, the speech pattern closest to the speech waveform is encoded and transmitted to the receiving communication device (or to the base station). A voice recognition technique is applied to the comparison of the voice patterns. As a conventional technique, a technique for reducing a calculation load required for voice recognition used in VoIP or the like has been proposed (see Patent Document 1). ).

  Note that VoIP using the G729 codec requires a throughput of about 20 kbps. However, due to the deterioration of the propagation environment due to the high-speed movement of the communication device, the influence of multipath, etc., the quality of the communication channel may be reduced, and a band of about 20 kbps may not be secured. However, in RTP, even when packet loss or the like occurs due to the influence of the network environment, retransmission control is not performed and new packet transfer is continued. For this reason, when packet loss occurs due to the deterioration of the propagation environment, for example, voice data cannot be obtained on the receiving side, and the reproduced sound (decoded sound) is interrupted.

JP 2001-306093 A

  Therefore, the object of the present invention is a highly-reliable wireless communication capable of continuing a call without interrupting the voice even when the bandwidth required for the VoIP call cannot be secured due to the deterioration of the propagation environment during the call by VoIP An apparatus, a wireless communication method, and a wireless communication system are provided.

In order to solve the above-described problems, a wireless communication system according to a first invention
A wireless communication system having a transmitter wireless communication device and a receiver wireless communication device,
The calling-side wireless communication device is
A voice input unit (such as a microphone) through which voice is input (by the user);
A voice pattern analysis unit for analyzing a voice pattern (for each predetermined section) of the voice input from the voice input unit;
(A code generation unit that generates a code associated with the voice pattern analyzed by the voice pattern analysis unit)
A transmitter that transmits the voice pattern analyzed by the voice pattern analyzer and / or a code associated with the voice pattern;
A storage unit (such as a flash memory) that stores a plurality of the audio patterns transmitted by the transmission unit and the codes associated with the audio patterns;
As a result of the analysis by the voice pattern analysis unit, if the voice pattern of the voice newly input by the voice input unit corresponds to one of the voice patterns stored in the storage unit, the new input is performed. A control unit (a circuit, an arithmetic device such as a CPU, a software module, etc.) that controls the transmission unit to transmit a code associated with the voice pattern stored in the storage unit, corresponding to the voice pattern of the voice And
The receiving-side wireless communication device is:
An output unit (such as a speaker) that outputs (decodes) the sound transmitted from the wireless communication device on the transmission side;
An acquisition unit for acquiring a voice pattern transmitted from the wireless communication device on the calling side and / or a code associated with the voice pattern;
A storage unit (such as a flash memory) that stores the audio pattern acquired by the acquisition unit together with a code associated with the audio pattern;
When the code stored in the storage unit is acquired by the acquisition unit, the control for controlling the output unit to output the sound according to the voice pattern stored in the storage unit related to the code Units (circuits, arithmetic devices such as CPU, software modules, etc.),
It is characterized by that.
Here, the analysis (voice recognition) by the voice pattern analysis unit can use an existing method (for example, described in Patent Document 1) as appropriate.

Also, the solution of the present invention can be realized as an apparatus.
For example, the wireless communication device according to the second invention is:
A voice input unit (such as a microphone) through which voice is input (by the user);
A voice pattern analysis unit for analyzing a voice pattern (for each predetermined section) of the voice input from the voice input unit;
(A code generation unit that generates a code associated with the voice pattern analyzed by the voice pattern analysis unit)
A transmitter that transmits the voice pattern analyzed by the voice pattern analyzer and / or a code associated with the voice pattern;
A first storage unit (such as a flash memory) that stores a plurality of the voice pattern transmitted by the transmission unit and the code associated with the voice pattern;
An output unit (such as a speaker) that outputs (decodes) audio transmitted from another wireless communication device;
An acquisition unit that acquires a voice pattern transmitted from the other wireless communication device and / or a code associated with the voice pattern;
A second storage unit (such as a flash memory) that stores the audio pattern acquired by the acquisition unit together with a code associated with the audio pattern;
As a result of the analysis by the voice pattern analysis unit, if the voice pattern of the voice newly input by the voice input unit corresponds to one of the voice patterns stored in the first storage unit, the new The transmission unit is controlled to transmit a code associated with the voice pattern stored in the first storage unit corresponding to the voice pattern of the voice inputted to the first storage unit. When the code stored in the second storage unit is acquired, the control for controlling the output unit to output the voice according to the voice pattern stored in the second storage unit related to the code Parts (circuits, arithmetic devices such as CPU, software modules, etc.)
It is characterized by providing.

Furthermore, the solution of the present invention can be realized by a wireless communication device on the transmission side.
For example, the wireless communication device according to the third invention is:
A voice input unit (by the user) for voice input;
A voice pattern analysis unit for analyzing a voice pattern (for each predetermined section) of the voice input from the voice input unit;
(A code generation unit that generates a code associated with the voice pattern analyzed by the voice pattern analysis unit)
A transmitter that transmits the voice pattern analyzed by the voice pattern analyzer and / or a code associated with the voice pattern;
A storage unit for storing a plurality of the voice patterns transmitted by the transmission unit and the codes associated with the voice patterns;
As a result of the analysis by the voice pattern analysis unit, if the voice pattern of the voice newly input by the voice input unit corresponds to one of the voice patterns stored in the storage unit, the new input is performed. A control unit that controls the transmission unit to transmit a code associated with the voice pattern stored in the storage unit, corresponding to the voice pattern of the voice
It is characterized by providing.

A wireless communication apparatus according to a fourth invention is
A determination unit for determining a quality of a channel used for a call with the other wireless communication;
The controller is
Based on the quality of the channel determined by the determination unit, the speech pattern and a code associated with the speech pattern are transmitted, or a code associated with the speech pattern stored in the storage unit is transmitted. So as to control the transmission unit,
It is characterized by that.

A wireless communication apparatus according to a fifth invention
The controller is
Controlling the transmission unit to transmit the voice pattern and a code associated with the voice pattern using a channel different from a channel used for a call with the other wireless communication device;
It is characterized by that.

A wireless communication apparatus according to a sixth invention
The controller is
When the voice pattern of the voice newly input from the voice input unit corresponds to one of the voice patterns stored in the storage unit as a result of the analysis by the voice pattern analysis unit, the voice pattern is stored in the storage unit. The transmission unit is controlled to transmit information related to the duration of the voice newly input by the voice input unit together with the code associated with the voice pattern being set.
It is characterized by that.

A wireless communication apparatus according to a seventh invention
The controller is
If the voice pattern of the voice newly input from the voice input unit does not correspond to any of the voice patterns stored in the storage unit, the newly input voice itself or the newly input voice pattern Controlling the transmitting unit to transmit data encoded encoded voice,
It is characterized by that.

Also, the solution of the present invention can be realized by a wireless communication device on the receiving side.
For example, the wireless communication device according to the eighth invention is:
An output unit that outputs (decodes) audio transmitted from another wireless communication device;
An acquisition unit that acquires a voice pattern transmitted from the other wireless communication device and / or a code associated with the voice pattern;
A storage unit for storing the voice pattern acquired by the acquisition unit together with a code associated with the voice pattern;
When the code stored in the storage unit is acquired by the acquisition unit, the control for controlling the output unit to output the sound according to the voice pattern stored in the storage unit related to the code And
It is characterized by providing.

A wireless communication apparatus according to a ninth invention
The acquisition unit
Along with the code associated with the voice pattern transmitted from the other wireless communication device, information on the duration of the voice according to the voice pattern is acquired,
The controller is
Controlling the output unit so as to output the voice of the voice pattern stored in the storage unit related to the code acquired by the acquisition unit during the duration period;
It is characterized by that.

As described above, the solution of the present invention has been described as an apparatus. However, the present invention can be realized as a method, a program, and a storage medium that stores the program substantially corresponding to these, and the scope of the present invention. It should be understood that these are also included.
For example, a wireless communication method according to a tenth aspect of the present invention that realizes the present invention is as follows:
A wireless communication method performed by a wireless communication device in a call with another wireless communication device,
A voice input step in which voice is input (by the user);
A voice pattern analysis step of analyzing a voice pattern (for each predetermined section) of the voice input in the voice input step;
(A code generation step for generating a code associated with the voice pattern analyzed in the voice pattern analysis step)
A transmission step of transmitting the voice pattern analyzed in the voice pattern analysis step and / or a code associated with the voice pattern;
Storing the voice pattern transmitted in the transmitting step and the code associated with the voice pattern;
The transmitting step includes
As a result of the analysis by the speech pattern analysis step, if the speech pattern of the speech newly input by the speech input step corresponds to any of the speech patterns stored in the storing step, the newly input Transmitting a code associated with the voice pattern stored in the storing step corresponding to the voice pattern of the received voice;
It is characterized by that.

Furthermore, the solution of the present invention can be realized as a receiving method.
That is, the wireless communication method (reception method) according to the eleventh invention is
A determination step of determining a quality of a channel used for a call with the other wireless communication (based on a power level of a received signal, SINR, etc.);
The transmitting step includes
Based on the quality of the channel determined in the determination step, the speech pattern and the code associated with the speech pattern are transmitted, or the code associated with the speech pattern stored in the storing step is Send,
It is characterized by that.

A wireless communication method according to a twelfth invention is
The transmitting step includes
Transmitting the voice pattern and a code associated with the voice pattern using a channel different from a channel used for a call with the other wireless communication device;
It is characterized by that.

A wireless communication method according to a thirteenth invention is
The transmitting step includes
As a result of the analysis by the voice pattern analysis step, if the voice pattern of the voice newly input in the voice input step corresponds to any of the voice patterns stored in the storing step, the storage is performed. Along with the code associated with the voice pattern stored in the step, information on the duration of the voice newly input in the voice input step is also transmitted.
It is characterized by that.

A wireless communication method according to a fourteenth invention is
The transmitting step includes
If the voice pattern of the voice newly input in the voice input step does not correspond to any of the voice patterns stored in the storing step, the newly input voice itself or the new voice pattern Send data encoded in the voice input to
It is characterized by that.

Furthermore, the solution of the present invention can be realized as a transmission method.
Accordingly, the wireless communication method (transmission method) according to the fifteenth aspect of the invention is
A wireless communication method performed by a wireless communication device in a call with another wireless communication device,
An output step of outputting (decoding) audio transmitted from the other wireless communication device;
An acquisition step of acquiring a voice pattern transmitted from the other wireless communication device and / or a code associated with the voice pattern;
Storing the voice pattern obtained in the obtaining step together with a code associated with the voice pattern;
The output step includes
When the code stored in the storing step is acquired by the acquiring step, the voice according to the voice pattern stored in the storing step, which is related to the code, is output.
It is characterized by that.

A wireless communication method according to a sixteenth invention is
In the acquisition step,
Along with the code associated with the voice pattern transmitted from the other wireless communication device, information on the duration of the voice according to the voice pattern is acquired,
The output step includes
Outputting the sound of the sound pattern stored in the storing step, related to the code acquired in the acquiring step, for the duration of the duration;
It is characterized by that.

Furthermore, the solution of the present invention can be realized as a wireless communication method using a wireless communication apparatus capable of transmitting and receiving.
That is, the wireless communication method according to the seventeenth invention is
A wireless communication method between a transmitting-side wireless communication device and a receiving-side wireless communication device,
In the transmitting side wireless communication device,
A voice input step in which voice is input (by the user);
A voice pattern analysis step of analyzing a voice pattern (for each predetermined section) of the voice input in the voice input step;
(A code generation step for generating a code associated with the voice pattern analyzed in the voice pattern analysis step)
A transmission step of transmitting the voice pattern analyzed in the voice pattern analysis step and / or a code associated with the voice pattern;
Storing the voice pattern transmitted in the transmission step and the code associated with the voice pattern;
The transmitting step includes
As a result of the analysis by the voice pattern analysis step, if the voice pattern of the voice newly input by the voice input step corresponds to one of the voice patterns stored in the storage step, the newly input voice is input. Transmitting a code associated with the voice pattern stored in the storing step corresponding to the voice pattern of the voice,
In the receiving-side wireless communication device,
An output step of outputting (decoded) the voice transmitted from the originating wireless communication device;
An acquisition step of acquiring a voice pattern and / or a code associated with the voice pattern transmitted from the originating wireless communication device;
Storing the voice pattern obtained in the obtaining step together with a code associated with the voice pattern;
The output step includes
When the code stored in the storing step is acquired in the acquiring step, the sound according to the sound pattern stored in the storing step is output related to the code.
It is characterized by that.
Each step in the above-described wireless communication method is performed by a circuit, an arithmetic device such as a CPU, a software module, or the like.

  As described above, according to the present invention, when the propagation environment is good, the voice data is transmitted to the receiving side together with a code associated with the voice data in advance, and the propagation environment deteriorates and the bandwidth required for the VoIP call is reduced. Is not secured, only the code that does not require a wide band for transmission is transmitted to the receiving side. Since the receiving side can output the voice based on the voice data associated with the already transmitted code, it is possible to maintain the VoIP call without interrupting the voice.

  Hereinafter, embodiments of the wireless communication apparatus according to the present invention will be described in detail with reference to the drawings. The wireless communication device may be a portable receiving terminal (such as a mobile phone or a PDA (personal digital assistance)) capable of wireless communication. FIG. 1 is a block diagram showing a configuration of a wireless communication apparatus according to an embodiment of the present invention. The wireless communication apparatus 100 shown in the figure includes a wireless communication unit 110, a voice pattern analysis unit 120, a voice pattern code generation unit 130, a voice pattern code acquisition unit 140, a call quality determination unit 150, a packet generation unit 160, and a storage unit (flash 170, a sound processing unit 180, and a control unit (calculation means such as a CPU and software module) 190. The wireless communication apparatus 100 further includes an antenna ANT, an audio input unit (such as a microphone) MIC, an audio output unit (such as a speaker) SP, and a measurement unit TIM. The wireless communication unit 110 includes a transmission unit 112 and a reception unit 114. The storage unit 170 includes a transmitted code storage unit 172 and a received code storage unit 174.

  The outline of the communication apparatus according to the present invention will be described together with the function of each block in the block diagram of FIG. The transmission unit 112 and the reception unit 114 transmit / receive data to / from other wireless communication devices via the antenna ANT. The voice input unit MIC receives voice input (call) from the user. The voice pattern analysis unit 120 analyzes the voice pattern of the voice input from the voice input unit MIC. Appropriate existing speech recognition techniques can be used for this analysis. The voice pattern code generation unit 130 generates a code associated with the voice pattern analyzed by the voice pattern analysis unit 120. This code can be 2 bytes, for example, depending on the type of speech pattern being analyzed. Therefore, the code generated by the voice pattern code generation unit 130 can be transmitted to the wireless communication apparatus on the receiving side even in a very narrow band. The call quality determination unit 150 determines the communication quality of a channel through which the wireless communication apparatus 100 communicates with another wireless communication apparatus or a base station. This determination can be made based on, for example, the power level of the pilot signal transmitted by another wireless communication device, packet loss, SINR, or the like. The packet generation unit 160 packetizes the voice pattern analyzed by the voice pattern analysis unit 120 and the code generated by the voice pattern code generation unit 130. Further, the packet generation unit 160 also packetizes voice data (encoded data) of voice input from the voice input unit MIC based on RTP. The audio processing unit 180 performs various processes such as A / D conversion and D / A conversion of an audio signal, encoding of a signal to be transmitted, and decoding of a received signal. The audio processing unit 180 also performs audio data codec using an appropriate method. The audio output unit SP outputs (reproduces) audio data received from another wireless communication device.

  Of the storage unit 170, the transmitted code storage unit 172 is associated with the transmitted voice pattern and the voice pattern transmitted to another wireless communication apparatus or base station by the transmission unit 112 based on the control of the control unit 190. Store the sign. The reception code storage unit 174 stores a voice pattern received from another wireless communication device and a code associated with the voice pattern. The control unit 190 controls each functional unit.

  FIG. 2 is a schematic diagram of time slots used when the communication quality of a channel used in a VoIP call with another wireless communication apparatus is good. As shown in the figure, in an uplink (during transmission) time slot, slot # 1 can be used for transmitting a voice pattern and a code associated with the voice pattern, and slot # 2 can be used for a VoIP call. Similarly, slot # 1 can be used for a VoIP call even in a downlink (when receiving) time slot. Such transmission of the voice pattern and code is performed when the communication quality determination unit 150 determines that the communication quality of the channel is good. This is because when the receiving side wireless communication apparatus receives only the code associated with the voice pattern, it outputs the voice based on the voice pattern associated with the code received before that. This is because the pattern needs to be received correctly (details will be described later).

  FIG. 3 is a diagram schematically illustrating data (packet flow) transmitted between the wireless communication devices 100 and 100 ′ when a VoIP call is performed between the wireless communication devices. As shown in the figure, the wireless communication device 100 transmits a voice pattern packet including a voice pattern and a code associated with the voice pattern (voice pattern) while transmitting a VoIP packet containing VoIP call data (VoIP call). Notification).

  Next, a voice pattern and a code associated with the voice pattern will be described with reference to the drawings. FIG. 4 is a diagram illustrating a voice pattern of a voice input from the voice input unit MIC and a code associated with the voice pattern. In the graph of the figure, the horizontal axis represents frequency and the vertical axis represents amplitude. Assume that the voice pattern analysis unit 120 obtains a voice pattern as shown in FIG. 4 from the voice input from the voice input unit MIC. For convenience of explanation, it is assumed that the pattern in FIG. 4A is “voice pattern A” and the pattern in FIG. 4B is “voice pattern B”. The voice pattern code generation unit 130 generates a code “A” for the voice pattern A and a code “B” for the voice pattern B so as to be associated with each voice pattern.

  The reception process and transmission process of the wireless communication apparatus 100 will be described using a flowchart. FIG. 5 is an example of a flowchart of a transmission process (transmission side process) of the wireless communication apparatus 100, and FIG. 6 is an example of a flowchart of a reception process (reception side process) of the wireless communication apparatus 100.

  The process at the time of transmission will be described with reference to FIG. It is assumed that VoIP call data transmission processing (transmission) is performed in parallel with the voice pattern transmission processing shown in FIG. First, in step S11, the processing loop 1 until the call ends is started. First, in step S12, the call quality determination unit 150 determines the quality of the communication channel. If it is determined that the call quality is good, the process proceeds to step S17. In step S17, the control unit 190 controls the transmission unit 112 to generate the voice pattern of the voice input from the voice input unit MIC and the code generated by the voice pattern generation unit 130 in association with the voice pattern. , Send to the receiver. In step S18, control unit 190 stores the transmitted voice pattern and code transmitted in step S17 in transmitted code storage unit 172. Before transmitting the voice pattern in step S <b> 17, the voice pattern newly input by the voice pattern analysis unit 120 is one of the transmitted voice patterns stored in the transmitted code storage unit 172. It is determined whether or not it corresponds, and when it is determined that it corresponds, the control unit 190 can also control the transmission unit 112 so as not to transmit the newly input voice pattern. Thereby, the used capacity of the storage unit 170 can be reduced.

  If it is determined in step S12 that the call quality is not good, the process proceeds to step S13. In step S13, the speech pattern analysis unit 120 analyzes the speech pattern input from the speech input unit MIC based on an appropriate existing speech recognition method. For example, the voice pattern analysis unit 120 recognizes the voice pattern shown in FIG. In step S <b> 13, the voice pattern analysis unit 120 uses the measurement unit TIM to measure the duration of the sound having the recognized voice pattern (the time during which the user continued to emit sound). Next, in step S <b> 14, the speech pattern analysis unit 120 determines whether the speech pattern of the newly input speech corresponds to any of a plurality of speech patterns stored in the transmitted code storage unit 172. Determine. That is, it is determined whether or not an audio pattern as shown in FIG. 4 has already been transmitted to the wireless communication device on the receiving side. If it is determined in step S14 that the voice pattern has already been transmitted, the process proceeds to step S15. In step S15, control unit 190 controls packet generation unit 160 and transmission unit 112 to transmit a transmitted voice pattern corresponding to the newly input voice pattern stored in transmitted code storage unit 172. The code associated with is packetized and transmitted. In step S15, information related to the duration of the sound measured in step S13 is also transmitted. If it is determined in step S12 that the voice pattern is not already transmitted, the process proceeds to step S16, and the control unit 190 transmits the encoded data (encoded data) of the newly input voice pattern. The packet generator 160 and the transmitter 112 are controlled. Thereafter, steps S12 to S18 are repeated until the call is finished.

  Next, processing at the time of reception will be described with reference to FIG. It is assumed that the VoIP call data reception process is performed in parallel with the voice pattern reception process shown in FIG. First, in step S21, a processing loop until the call is finished is started. When the reception unit 114 receives a voice pattern from the wireless communication device on the transmission side, the voice pattern code acquisition unit 140 determines the type of the received data in step S22. Specifically, it is determined whether the received data is “speech pattern and code associated with the voice pattern”, “symbol only”, or “VoIP call data”. When the received data is “voice pattern and code”, the process proceeds to step S 23, and the control unit 190 stores the received voice pattern and code in the received code storage unit 174. If the received data is “only code”, the process proceeds to step S24, and the control unit 190 corresponds to the received code among the plurality of codes stored in the received code storage unit 174. Take out. Further, the control unit 190 outputs a voice pattern associated with the extracted code from the received code storage unit 174 to the voice processing unit 180. In step S25, the voice processing unit 180 performs predetermined processing on the input voice pattern and outputs the result to the voice output unit SP. The control unit 190 controls the audio output unit SP to output (reproduce) audio based on the audio pattern input to the audio output unit SP. If the received data is VoIP call data in step S22, the process proceeds to step S26, and the control unit 190 controls the audio processing unit 180 and the audio output unit SP to output audio based on the received VoIP data. (Reproduce.

  FIG. 7 is a sequence diagram illustrating an example of processing of the wireless communication system according to the present invention. The originating terminal (wireless communication apparatus) 100 analyzes the voice pattern of the speaker (user), and receives information such as the code associated with the voice pattern and the duration of the voice pattern, as well as the receiving terminal (wireless communication apparatus) 100 ′. Send to. For example, it is assumed that the utterance “Hello” is input to the utterance side terminal 100, and the voice patterns “H” and “S” are, for example, patterns A and B shown in FIG. First, the transmitting terminal 100 recognizes the voice pattern A of “mo”, associates the code “A”, and transmits it to the receiving terminal 100 ′ (voice pattern A + code “A”). Similarly, the transmitting terminal 100 recognizes the voice pattern B of “shi”, associates the code “B”, and transmits it to the receiving terminal 100 ′ (voice pattern B + code “B”). The voice pattern and code transmitted to the receiving terminal 100 ′ are stored in the transmitted code storage unit 172.

  In addition, the receiving terminal 100 ′ stores the voice pattern A + code “A” and the voice pattern B + code “B” transmitted from the calling terminal 100 in the received code storage unit 174. Thereafter, the originating terminal 100 recognizes the voice pattern A of “M” again, but since the speech pattern A and the code “A” have already been transmitted to the receiving terminal 100 ′, the transmitted code storage unit 172. Is transmitted to the receiving side 100 'together with information on the duration of "mo" (220 ms in the example in the figure). That is, unlike the prior art, only the information regarding the code and the duration is transmitted, and the encoded data of the speech having the speech pattern A (the encoded data of “m”) is not transmitted. Similarly, only “B” and information related to the duration are transmitted regarding “SH”. However, since the receiving side terminal 100 ′ has already stored the sound patterns corresponding to the codes “A” and “B”, the sound “m” based on the sound pattern A corresponding to the code “A” is transmitted to the transmitting side. Playback (output) can be performed for the duration time received from the terminal 100. That is, the encoded data of “mo” and “shi” is not required for reproduction of “mo” and “shi”. Therefore, the bandwidth used for data transmission can be greatly reduced compared to the conventional technique in which encoded data of “mo” and “shi” is transmitted. As a result, the communication quality of the channel deteriorates, and it becomes possible to maintain a call even if the required bandwidth for VoIP communication cannot be secured.

Note that there may be a case where the calling terminal 100 cannot recognize the voice of the speaker due to the influence of noise or the like. Processing of the communication system in this case will be described using the sequence diagram of FIG. In the example in the figure, it is assumed that the speaker utters “Hello” but the second “H” is not recognized. In this case, it is only necessary to transmit the encoded data of “M” that has not been recognized to the receiving terminal 100 ′. In the sequence diagram of FIG. 8, data is transmitted as follows.
1) "M"-Voice pattern A, duration 220ms-Symbol "A" +22 (220ms information expressed in 10ms units, and so on)
2) "Shi"-Voice pattern B, duration 210 ms-Symbol "B" +21
3) “Momo”-Not recognized. The voice-encoded data in this section is transmitted.
4) "Shi"-Voice pattern B, duration 210 ms-Symbol "B" +21

  In the case of 1) 2) and 4), the voice receiving side terminal 100 ′ reproduces the voice based on the voice pattern that has been received in advance and stored in the storage unit based on the transmitted code. In the case of 3), the received encoded data is decoded and reproduced.

  In addition, voice patterns are not separated by short time intervals such as “mo” and “shi” as described above. For example, a voice pattern of a single “hoshi moshi” or longer syntax is supported. A voice pattern to be transmitted can be transmitted. For example, morphological analysis can be used for discrimination of the spoken words. That is, the time interval for extracting the voice pattern from the input voice may be varied. It is also possible to apply a syntactic analysis technique such as the morphological analysis described above to extract words or words frequently used by a speaker and associate a code with a speech pattern corresponding to the extracted words. In this way, the number of voice patterns and codes to be transmitted to the receiving side can be reduced. In addition, since the number of voice patterns to be referred to stored in the storage unit is reduced, the receiving side can also reduce the calculation load.

  The advantages of the present invention will be described again. According to the present invention, when the propagation environment is good, the voice data is transmitted to the receiving side in advance together with the code associated with the voice data, and the bandwidth necessary for the VoIP call cannot be secured because the propagation environment deteriorates In addition, only the codes that do not require a wide band for transmission are transmitted to the receiving side. Since the receiving side can output the voice based on the voice data associated with the already transmitted code, it is possible to maintain the VoIP call without interrupting the voice. That is, it is possible to provide a highly durable wireless communication device, a wireless communication method, and a wireless communication system capable of continuing a call even when a bandwidth necessary for the VoIP call cannot be secured due to a deterioration of the propagation environment. .

  Although the present invention has been described based on the drawings and examples, it should be noted that those skilled in the art can easily make various modifications and corrections based on the present disclosure. Therefore, it should be noted that these variations and modifications are included in the scope of the present invention. For example, the functions included in each means, each step, etc. can be rearranged so as not to be logically contradictory, and a plurality of means, steps, etc. can be combined into one or divided. .

It is a block diagram which shows the structure of the radio | wireless communication apparatus by one embodiment of this invention. It is the schematic of the time slot used when the communication quality of the channel used by the VoIP call with another radio | wireless communication apparatus is favorable. It is a figure which shows roughly the data (flow of a packet) transmitted between radio | wireless communication apparatuses 100 and 100 'when performing a VoIP call between radio | wireless communication apparatuses. It is a figure which shows the audio | voice pattern of the audio | voice input from the audio | voice input part MIC, and the code | symbol linked | related with the said audio | voice pattern. 3 is an example of a flowchart of a transmission process (transmission side process) of the wireless communication apparatus 100. 6 is an example of a flowchart of reception processing (reception side processing) of the wireless communication apparatus 100. It is a sequence diagram explaining an example of the process of the radio | wireless communications system by this invention. It is a sequence diagram explaining an example of the process of the radio | wireless communications system by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100,100 'Wireless communication apparatus 110 Wireless communication part 112 Transmission part 114 Reception part 120 Voice pattern analysis part 130 Voice pattern code generation part 140 Voice pattern code acquisition part 150 Call quality judgment part 160 Packet generation part 170 Storage part 172 Transmitted code Storage unit 174 Received code storage unit 180 Audio processing unit 190 Control unit ANT antenna MIC Audio input unit SP Audio output unit TIM Measurement unit A, B Code

Claims (17)

A wireless communication system having a transmitter wireless communication device and a receiver wireless communication device,
The calling-side wireless communication device is
An audio input unit for inputting audio;
A voice pattern analysis unit for analyzing a voice pattern of the voice input from the voice input unit;
A transmitter that transmits the voice pattern analyzed by the voice pattern analyzer and / or a code associated with the voice pattern;
A storage unit for storing a plurality of the voice patterns transmitted by the transmission unit and the codes associated with the voice patterns;
As a result of the analysis by the voice pattern analysis unit, if the voice pattern of the voice newly input by the voice input unit corresponds to one of the voice patterns stored in the storage unit, the new input is performed. A control unit that controls the transmission unit to transmit a code associated with the voice pattern stored in the storage unit, corresponding to the voice pattern of the voice,
The receiving-side wireless communication device is:
An output unit for outputting the voice transmitted from the transmitting side wireless communication device;
An acquisition unit for acquiring a voice pattern transmitted from the wireless communication device on the calling side and / or a code associated with the voice pattern;
A storage unit for storing the voice pattern acquired by the acquisition unit together with a code associated with the voice pattern;
When the code stored in the storage unit is acquired by the acquisition unit, the control for controlling the output unit to output the sound according to the voice pattern stored in the storage unit related to the code Comprising a part,
A wireless communication system. An audio input unit for inputting audio;
A voice pattern analysis unit for analyzing a voice pattern of the voice input from the voice input unit;
A transmitter that transmits the voice pattern analyzed by the voice pattern analyzer and / or a code associated with the voice pattern;
A first storage unit that stores a plurality of the voice patterns transmitted by the transmission unit and the codes associated with the voice patterns;
An output unit for outputting audio transmitted from another wireless communication device;
An acquisition unit that acquires a voice pattern transmitted from the other wireless communication device and / or a code associated with the voice pattern;
A second storage unit that stores the voice pattern acquired by the acquisition unit together with a code associated with the voice pattern;
As a result of the analysis by the voice pattern analysis unit, if the voice pattern of the voice newly input by the voice input unit corresponds to one of the voice patterns stored in the first storage unit, the new The transmission unit is controlled to transmit a code associated with the voice pattern stored in the first storage unit corresponding to the voice pattern of the voice inputted to the first storage unit. When the code stored in the second storage unit is acquired, the control for controlling the output unit to output the voice according to the voice pattern stored in the second storage unit related to the code And
A wireless communication apparatus comprising: An audio input unit for inputting audio;
A voice pattern analysis unit for analyzing a voice pattern of the voice input from the voice input unit;
A transmitter that transmits the voice pattern analyzed by the voice pattern analyzer and / or a code associated with the voice pattern;
A storage unit for storing a plurality of the voice patterns transmitted by the transmission unit and the codes associated with the voice patterns;
As a result of the analysis by the voice pattern analysis unit, if the voice pattern of the voice newly input by the voice input unit corresponds to one of the voice patterns stored in the storage unit, the new input is performed. A control unit that controls the transmission unit to transmit a code associated with the voice pattern stored in the storage unit, corresponding to the voice pattern of the voice
A wireless communication apparatus comprising: The wireless communication device according to claim 3.
A determination unit for determining a quality of a channel used for a call with the other wireless communication;
The controller is
Based on the quality of the channel determined by the determination unit, the speech pattern and a code associated with the speech pattern are transmitted, or a code associated with the speech pattern stored in the storage unit is transmitted. So as to control the transmission unit,
A wireless communication apparatus. The wireless communication device according to claim 3 or 4,
The controller is
Controlling the transmission unit to transmit the voice pattern and a code associated with the voice pattern using a channel different from a channel used for a call with the other wireless communication device;
A wireless communication apparatus. In the radio | wireless communication apparatus as described in any one of Claims 3-5,
The controller is
When the voice pattern of the voice newly input from the voice input unit corresponds to one of the voice patterns stored in the storage unit as a result of the analysis by the voice pattern analysis unit, the voice pattern is stored in the storage unit. The transmission unit is controlled to transmit information related to the duration of the voice newly input by the voice input unit together with the code associated with the voice pattern being set.
A wireless communication apparatus. In the radio | wireless communication apparatus as described in any one of Claims 3-6,
The controller is
If the voice pattern of the voice newly input from the voice input unit does not correspond to any of the voice patterns stored in the storage unit, the newly input voice itself or the newly input voice pattern Controlling the transmitting unit to transmit data encoded encoded voice,
A wireless communication apparatus. An output unit for outputting audio transmitted from another wireless communication device;
An acquisition unit that acquires a voice pattern transmitted from the other wireless communication device and / or a code associated with the voice pattern;
A storage unit for storing the voice pattern acquired by the acquisition unit together with a code associated with the voice pattern;
When the code stored in the storage unit is acquired by the acquisition unit, the control for controlling the output unit to output the sound according to the voice pattern stored in the storage unit related to the code And
A wireless communication apparatus comprising: The wireless communication apparatus according to claim 8, wherein
The acquisition unit
Along with the code associated with the voice pattern transmitted from the other wireless communication device, information on the duration of the voice according to the voice pattern is acquired,
The controller is
Controlling the output unit so as to output the voice of the voice pattern stored in the storage unit related to the code acquired by the acquisition unit during the duration period;
A wireless communication apparatus. A wireless communication method performed by a wireless communication device in a call with another wireless communication device,
A voice input step in which voice is input;
A voice pattern analysis step of analyzing a voice pattern of the voice input in the voice input step;
A transmission step of transmitting the voice pattern analyzed in the voice pattern analysis step and / or a code associated with the voice pattern;
Storing the voice pattern transmitted in the transmitting step and the code associated with the voice pattern;
The transmitting step includes
As a result of the analysis by the speech pattern analysis step, if the speech pattern of the speech newly input by the speech input step corresponds to any of the speech patterns stored in the storing step, the newly input Transmitting a code associated with the voice pattern stored in the storing step corresponding to the voice pattern of the received voice;
A wireless communication method. The wireless communication method according to claim 10, wherein
A determination step of determining a quality of a channel used for a call with the other wireless communication;
The transmitting step includes
Based on the quality of the channel determined in the determination step, the speech pattern and the code associated with the speech pattern are transmitted, or the code associated with the speech pattern stored in the storing step is Send,
A wireless communication method. The wireless communication method according to claim 10 or 11,
The transmitting step includes
Transmitting the voice pattern and a code associated with the voice pattern using a channel different from a channel used for a call with the other wireless communication device;
A wireless communication apparatus. In the radio | wireless communication method as described in any one of Claims 10-12,
The transmitting step includes
As a result of the analysis by the voice pattern analysis step, if the voice pattern of the voice newly input in the voice input step corresponds to any of the voice patterns stored in the storing step, the storage is performed. Along with the code associated with the voice pattern stored in the step, information on the duration of the voice newly input in the voice input step is also transmitted.
A wireless communication method. The wireless communication method according to any one of claims 10 to 13, wherein
The transmitting step includes
If the voice pattern of the voice newly input in the voice input step does not correspond to any of the voice patterns stored in the storing step, the newly input voice itself or the new voice pattern Send data encoded in the voice input to
A wireless communication method. A wireless communication method performed by a wireless communication device in a call with another wireless communication device,
An output step of outputting audio transmitted from the other wireless communication device;
An acquisition step of acquiring a voice pattern transmitted from the other wireless communication device and / or a code associated with the voice pattern;
Storing the voice pattern obtained in the obtaining step together with a code associated with the voice pattern;
The output step includes
When the code stored in the storing step is acquired by the acquiring step, the voice according to the voice pattern stored in the storing step, which is related to the code, is output.
A wireless communication method. The wireless communication method according to claim 15, wherein
In the acquisition step,
Along with the code associated with the voice pattern transmitted from the other wireless communication device, information on the duration of the voice according to the voice pattern is acquired,
The output step includes
Outputting the sound of the sound pattern stored in the storing step, related to the code acquired in the acquiring step, for the duration of the duration;
A wireless communication method. A wireless communication method between a transmitting-side wireless communication device and a receiving-side wireless communication device,
In the transmitting side wireless communication device,
A voice input step in which voice is input;
A voice pattern analysis step of analyzing a voice pattern of the voice input in the voice input step;
A transmission step of transmitting the voice pattern analyzed in the voice pattern analysis step and / or a code associated with the voice pattern;
Storing the voice pattern transmitted in the transmission step and the code associated with the voice pattern;
The transmitting step includes
As a result of the analysis by the voice pattern analysis step, if the voice pattern of the voice newly input by the voice input step corresponds to one of the voice patterns stored in the storage step, the newly input voice is input. Transmitting a code associated with the voice pattern stored in the storing step corresponding to the voice pattern of the voice,
In the receiving-side wireless communication device,
An output step of outputting the voice transmitted from the originating wireless communication device;
An acquisition step of acquiring a voice pattern and / or a code associated with the voice pattern transmitted from the originating wireless communication device;
Storing the voice pattern obtained in the obtaining step together with a code associated with the voice pattern;
The output step includes
When the code stored in the storing step is acquired in the acquiring step, the sound according to the sound pattern stored in the storing step is output related to the code.
A wireless communication method.

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