JP2008103960A - Communication equipment, communication system and communicating method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a communication equipment, communication system and communicating method capable of making sound to be easily caught by improving the quality of the sound. <P>SOLUTION: When an antenna 49 for a mobile station and a high frequency receiving part 50 receive a sound parameter representing a sound characteristic of a sound signal from base station communication equipment 32 being other communication equipment, concretely gain data and frequency characteristic data, a gain adjusting part 42 adjusts a sound characteristic of a sound signal representing a sound input by a microphone 41, concretely the gain of the sound signal, and a frequency characteristic adjusting part 43 adjusts the frequency characteristic of the sound signal on the basis of the received sound parameter. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a communication device, a communication system, and a communication method for transmitting and receiving an audio signal and a data signal.

  FIG. 1 is a block diagram showing a simplified configuration of a conventional digital wireless device 1. The digital wireless device 1 includes a transmitter 1A and a receiver 1B.

  In the transmitter 1A, an audio signal represented by audio input to a microphone (hereinafter referred to as “microphone”) 11 is amplified by a first transmission-side amplifier 12, and then an unnecessary signal included in the audio signal is filtered by a filter 13. It is attenuated, converted into a digital signal by analog / digital (A / D) conversion processing of the transmission side PCM codec 14, and given to the transmission side audio codec 15. In the transmission side audio codec 15, the input audio data is compressed and supplied to the transmission side DSP 16. The transmission side DSP 16 converts the compressed audio data into a transmission baseband signal based on a predetermined digital modulation method. The high frequency transmitter 17 multiplies the oscillation signal having a predetermined oscillation frequency by the generated modulated wave to perform frequency conversion. Thereafter, the frequency-converted signal is amplified to a desired signal strength by the second transmission side amplifier 18 and transmitted from the transmission side antenna 19 to another digital radio.

  In the receiver 1B, a signal transmitted from another digital radio and received by the receiving antenna 21 is amplified by the first receiving amplifier 22 and then given to the high frequency receiving unit 23. The high frequency receiving unit 23 multiplies the oscillation signal having a predetermined transmission frequency by the signal given from the first receiving side amplifier 22 to perform frequency conversion. The receiving side DSP 24 demodulates the frequency-converted signal into audio data, and gives the demodulated audio data to the receiving side audio codec 25. In the receiving side audio codec 25, the compressed audio data given from the receiving side DSP 24 is decompressed and converted into an analog signal by the digital / analog (D / A) conversion processing of the receiving side PCM codec 26. The signal is supplied to the second receiving side amplifier 27. The audio signal amplified by the second receiving side amplifier 27 is given to the speaker 28, and the sound represented by the audio signal is output from the speaker 28.

  When inputting sound into the microphone of the transceiver, the distance between the microphone and the user's mouth varies from user to user. Some users input sound into the microphone while the microphone is close to the mouth. Some users input sound into the microphone while keeping it away from their mouth. When the microphone is close to the mouth, that is, when the distance between the microphone and the mouth is relatively small, the sound is excessively input to the microphone, and especially in a digital radio, the sound quality is reduced when compressing the excessively input sound. The sound is likely to deteriorate and the sound output from the speaker is distorted, which may be difficult for the user to hear. In addition, it may be difficult to hear even depending on the level and speed of the voice uttered by the user.

  Therefore, a technique for improving the audibility of sound output from a speaker or the like has been proposed, and this technique is disclosed in Patent Documents 1 to 5, for example. Patent Document 1 discloses a technique for adjusting a volume level at a base station in accordance with ambient noise of a mobile phone terminal.

  In Patent Document 2, a test loopback signal is periodically transmitted from the mobile station to the control station via the base station, and the control station detects the loopback signal and loops back inside the control station. A technique is disclosed in which fluctuations in the level of a communication path are detected periodically by returning to the mobile station via the mobile station, and the reception volume of the communication path of the mobile station is adjusted to control the sound volume to be constant.

  In Patent Document 3, a speech recognition circuit is configured to receive a reference sound output from a speaker via a microphone and calculate an input / output characteristic parameter of the filter, and according to the calculated parameter, a filter of the filter is configured. A technique for adjusting input / output characteristics is disclosed.

  In Patent Document 4, by providing a sound pressure adjuster between the microphone unit and the sound amplifying unit, the sound pressure level of the transmitted sound signal is kept constant regardless of the input sound pressure level to the microphone unit. A technique for automatically adjusting the level is disclosed.

  Patent Document 5 discloses a reception frequency characteristic according to a user's desired audibility characteristic based on listening results of a plurality of types of audible measurement audible signals transmitted from a base station or a control station of a cellular radio communication system. A technique capable of setting is disclosed.

Japanese Patent No. 3416469 Japanese Patent Laid-Open No. 11-154901 JP-A-4-329740 Japanese Patent Laid-Open No. 8-195585 Japanese Patent No. 3302119

  Since the sound volume and frequency components are different depending on the user, the fixed sound circuit provided in the radio cannot handle the gain and frequency characteristics of all users, There is a problem that it cannot be made easy to hear.

  With a technology that includes an ALC (Automatic Level Control) circuit in a wireless device and controls the gain of audio input to a microphone, distortion of audio output from a speaker due to excessive input of audio to the microphone can be eliminated. However, it is impossible to output a voice that is easy to hear according to the frequency characteristics of the user.

  Even if the audio signal transmitted from the destination radio is received and the sound quality is adjusted using an equalizer, the audio signal transmitted from the source radio is distorted, so that the user can easily hear it. It is difficult to adjust the sound quality. Furthermore, since each has a different frequency characteristic depending on the type of microphone used in the wireless device, an apparatus capable of adjusting the frequency characteristic according to the type of microphone is desired.

  An object of the present invention is to provide a communication device, a communication system, and a communication method that can improve the quality of sound and make it easy to hear the sound.

  According to the present invention (1), the voice is converted into a signal and inputted by the voice input means. When the communication unit receives a voice parameter representing the voice characteristic of the voice signal from another communication device, the characteristic adjustment unit adjusts the voice characteristic of the voice signal input by the voice input unit based on the received voice parameter. .

  According to the present invention (1), the voice characteristics of the voice signal input by the voice input means are the same as the received voice parameters when the communication means receives a voice parameter representing the voice characteristics of the voice signal from another communication device. Based on this, the characteristic adjustment means adjusts. As a result, the voice signal whose voice characteristics have been adjusted by the characteristic adjusting means is transmitted to, for example, another communication apparatus, so that the other communication apparatus receives the voice signal whose voice characteristics have been adjusted. It is possible to output the voice to represent.

  Therefore, the quality of the sound output from the other communication device can be improved as compared with the sound represented by the sound signal before the sound characteristic is adjusted by the characteristic adjusting means of the communication device. This makes it easier for the user of the other communication device to hear the output sound than when the sound represented by the sound signal before the sound characteristic is adjusted by the characteristic adjustment means of the communication device is output. This can improve the convenience of users of other communication devices.

  Hereinafter, a plurality of modes for carrying out the present invention will be described. In the following description, portions corresponding to the matters described in the preceding embodiments are denoted by the same reference numerals, and redundant descriptions may be omitted. When only a part of the configuration is described, the other parts of the configuration are the same as those described in the preceding section. The following description includes a description of the communication method.

  FIG. 2 is a block diagram showing an electrical configuration of the communication system 30 according to the embodiment of the present invention. The communication system 30 includes a mobile station communication device 31 and a base station communication device 32. The mobile station communication device 31 and the base station communication device 32 are configured to be capable of wireless communication with each other. The mobile station communication device 31 of the present embodiment is mounted on a vehicle, for example, and configured to be movable. The base station communication device 32 according to the present embodiment is provided, for example, in a dispatching center that performs dispatching instructions and vehicle operation management for each vehicle. The mobile station communication device 31 corresponds to a communication device and a voice input side communication device, and the base station communication device 32 corresponds to another communication device and a voice output side communication device.

  The mobile station communication device 31 includes a microphone (hereinafter referred to as “microphone”) 41, a gain adjustment unit 42, a frequency characteristic adjustment unit 43, a PCM (Pulse Code Modulation) codec unit 44, an audio codec unit 46, a digital modulation unit 47, and high-frequency transmission. Unit 48, mobile station antenna 49, high frequency receiving unit 50, demodulation unit 51, mobile station side data processing unit 52, mobile station side control unit 53, data input / output unit 55, and mobile station side storage unit 56.

  The microphone 41 converts the input sound into an audio signal, and provides the audio signal to the gain adjustment unit 42. The gain adjustment unit 42 adjusts the gain of the audio signal supplied from the microphone 41 based on the audio parameter supplied from the mobile station side control unit 53, specifically, gain data representing the gain of the audio signal. The gain adjusting unit 42 adjusts the gain of the audio signal using, for example, an electronic volume. The audio signal whose gain has been adjusted by the gain adjusting unit 42 is given to the frequency characteristic adjusting unit 43.

  The frequency characteristic adjusting unit 43 is a frequency of the audio signal supplied from the gain adjusting unit 42 based on audio parameters supplied from the mobile station side control unit 53 described later, specifically, frequency characteristic data representing the frequency characteristics of the audio signal. Adjust the characteristics. The frequency characteristic adjusting unit 43 is constituted by an analog filter, for example, and adjusts the sound quality by changing the passband characteristic of the filter. The audio signal whose frequency characteristic is adjusted by the frequency characteristic adjusting unit 43 is given to the PCM codec unit 44. The frequency characteristic adjustment unit 43 may be realized by a digital filter using a DSP (Digital Signal Processor). In this case, the frequency characteristic adjustment unit 43 is arranged after the PCM codec unit 44 and adjusts the frequency characteristic of the audio signal converted into a digital signal by the PCM codec unit 44. Note that the gain adjusting unit 42 and the frequency characteristic adjusting unit 43 may be configured to be built in the microphone 41.

  The PCM codec unit 44 uses an analog-to-digital converter (abbreviation: ADC) to perform analog / digital (abbreviation: A / D) conversion on the audio signal supplied from the frequency characteristic adjustment unit 43. Processing is performed to convert an analog signal into a digital signal. The audio signal converted into the digital signal by the PCM codec unit 44 is given to the audio codec unit 46.

  The audio codec unit 46 compresses the audio signal supplied from the PCM codec unit 44 and supplies the compressed audio data to the digital modulation unit 47. The digital modulation unit 47 is often realized by a DSP, and converts the audio data provided from the audio codec unit 46 into a digital modulation wave based on a predetermined digital modulation method. The digital modulation unit 47 also receives data signals from the data input / output unit 55, for example, user data representing the user of the mobile station communication device 31, environment data representing the use environment of the mobile station communication device 31, and the microphone 41. A signal based on type data representing the type is converted into a digital modulated wave based on a predetermined digital modulation method. The digital modulation wave generated by the digital modulation unit 47 is converted into an analog signal by digital / analog (abbreviation: D / A) conversion processing and is given to the high frequency transmission unit 48.

  More specifically, the user data is crew number data representing the number of a crew member who gets on a vehicle on which the mobile station communication device 31 is mounted, for example. The environmental data includes, for example, vehicle type data indicating the type of vehicle on which the mobile station communication device 31 is mounted, and a vehicle number indicating the number of the vehicle on which the mobile station communication device 31 is mounted (hereinafter sometimes referred to as “vehicle number”). It is data. The type data is data representing the type of microphone such as a close-talking microphone and a fixed microphone.

  The high frequency transmitter 48 multiplies the oscillation signal having a predetermined oscillation frequency generated by the local oscillator and the modulated wave supplied from the digital modulator 47 to perform frequency conversion. The high frequency transmitter 48 attenuates an unnecessary signal included in the frequency-converted signal, and then amplifies the signal to a desired signal intensity by a power amplifier or the like, and the amplified signal is transmitted from the mobile station antenna 49 to the base station. Transmit to the communication device 32.

  The signal received by the mobile station antenna 49 is given to the high frequency receiver 50. The high frequency receiver 50 amplifies a signal received by the mobile station antenna 49 with a low noise amplifier or the like, and then attenuates an unnecessary signal included in the amplified signal. The high-frequency receiving unit 50 performs frequency conversion by multiplying an oscillation signal having a predetermined transmission frequency generated by a local oscillator and a signal amplified by a low noise amplifier or the like and attenuated by unnecessary signals. The high frequency receiver 50 removes a signal having an unnecessary frequency from the frequency-converted signal, passes a signal in a frequency band equal to or lower than a predetermined cut-off frequency, and gives the demodulator 51.

  The demodulator 51 converts the signal given from the high frequency receiver 50 into a digital signal by A / D conversion processing, demodulates it into an audio signal or a data signal based on a predetermined digital demodulation method, and demodulates the demodulated data signal. The data is supplied to the mobile station side data processing unit 52 and the data input / output unit 55.

  The mobile station side data processing unit 52 extracts a voice parameter representing the voice characteristics of the voice signal from the data signal given from the demodulation unit 51, and gives it to the mobile station side control unit 53.

  The mobile station side control unit 53 is realized by a processing circuit such as a microcomputer. The mobile station side control unit 53 is a data signal given from the mobile station side data processing unit 52, and is given from the microphone 41 based on a voice parameter representing a voice characteristic of a predetermined voice signal, specifically gain data. The gain adjustment unit 42 adjusts the gain of the audio signal to be generated, and the frequency characteristic adjustment unit 43 adjusts the frequency characteristic of the audio signal supplied from the gain adjustment unit 42 based on the audio parameter, specifically, the frequency characteristic data. .

  The data input / output unit 55 receives crew number data, which is user data input by an input device external to the mobile station communication device 31, vehicle type data and vehicle number data, which are environmental data, and type data of the microphone 41. Is done. The data input / output unit 55 receives a demodulated data signal provided from the demodulating unit 51.

  The data input / output unit 55 includes data read from the mobile station side storage unit 56, for example, user data representing the user of the mobile station communication device 31, environment data representing the use environment of the mobile station communication device 31, and the microphone 41. A signal based on the type data representing the type is output to the digital modulation unit 47.

  The mobile station side storage unit 56 stores crew number data that is user data input to the data input / output unit 55, vehicle type data and vehicle number data that are environment data, and type data of the microphone 41. The mobile station side storage unit 56 also represents data represented by the data signal supplied from the demodulating unit 51, for example, a voice parameter representing the voice characteristic of the voice signal, specifically, gain data representing the gain of the voice signal and the frequency characteristic of the voice signal. Is stored.

  The mobile station side control unit 53 receives at least one of user data, environmental data, and type data stored in the mobile station side storage unit 56 by using the digital modulation unit 47 and the high frequency transmission unit 48 to transmit the mobile station antenna. 49 to the base station communication device 32.

  The mobile station communication device 31 includes a call start key operated by the user when starting a call with the user of the base station communication device 32 by wireless communication, and a call end operated by the user when ending the call. And a key. The mobile station communication device 31 may include a press-to-talk (abbreviation: PTT) key that presses only during transmission of radio waves when making a call.

  The base station communication device 32 includes a base station antenna 61, a base station side communication unit 62, a speaker 63, a base station side data processing unit 64, a base station side storage unit 65, a base station side control unit 66, and a data input unit 67. Prepare.

  The base station side communication unit 62 amplifies a signal received by the base station antenna 61, attenuates an unnecessary signal included in the amplified signal, and generates an oscillation signal having a predetermined transmission frequency generated by a local oscillator. The frequency conversion is performed by multiplying the amplified signal obtained by attenuating the unnecessary signal.

  The base station side communication unit 62 removes a signal having an unnecessary frequency from the frequency-converted signal, passes a signal in a frequency band equal to or lower than a predetermined cutoff frequency, and then converts the signal into a digital signal by A / D conversion processing. Then, the audio signal or the data signal is demodulated based on a predetermined digital demodulation method. The demodulated audio signal is supplied to the speaker 63, and the demodulated data signal is supplied to the base station side data processing unit 64. The speaker 63 outputs the voice represented by the voice signal given from the base station side communication unit 62.

  The base station side data processing unit 64 extracts user data in the mobile station communication device 31 from the data signal given from the base station side communication unit 62. The base station side control unit 66 is realized by a processing circuit such as a microcomputer. The base station side control unit 66 stores the user data of the mobile station communication device 31 extracted by the base station side data processing unit 64 in the base station side storage unit 65.

  The base station side storage unit 65 is associated with the crew number data as user data, the vehicle type data and vehicle number data as environmental data, the type data of the microphone 41, and each of these data, and is input by the microphone 41. The gain data and the frequency characteristic data, which are voice parameters for adjusting the voice characteristics of the voice signal representing the voice, are stored. The base station side storage unit 65 also stores gain data and frequency characteristic data which are voice parameters when a plurality of data among user data, environmental data and type data are combined.

  The data input unit 67 is realized by a keyboard, for example. The data input unit 67 is a voice parameter for adjusting the voice characteristics of the voice signal transmitted from the mobile station communication device 31 and received by the base station antenna 61 and the base station side communication unit 62, specifically, gain data. And frequency characteristic data are input. The base station side control unit 66 gives the voice parameter input by the data input unit 67 to the base station side data processing unit 64.

  When the base station antenna 61 receives at least one of user data, environmental data, and type data, the base station side controller 66 obtains gain data that is a voice parameter associated with the received data. The frequency characteristic data is read from the base station side storage unit 65 and applied to the base station side data processing unit 64.

  The base station side data processing unit 64 is a signal based on gain data and frequency characteristic data that are voice parameters read from the base station side storage unit 65, and gain data and frequency that are voice parameters input by the data input unit 67. A signal based on the characteristic data is given to the base station side communication unit 62.

  The base station side communication unit 62 generates a modulated wave from the data signal provided from the base station side data processing unit 64 based on a predetermined digital modulation method. The base station side communication unit 62 performs frequency conversion by multiplying a signal obtained by converting the generated modulated wave into an analog signal by D / A conversion and an oscillation signal having a predetermined oscillation frequency generated by the local oscillator, and performs frequency conversion. An unnecessary signal included in the received signal is attenuated, and then the signal is amplified to a desired signal strength by a power amplifier or the like, and the amplified signal is transmitted from the base station antenna 61 to the mobile station communication device 31. .

  The microphone 41 in the mobile station communication device 31 of the present embodiment corresponds to a voice input unit. The digital modulation unit 47, the high frequency transmission unit 48, the mobile station antenna 49, the high frequency reception unit 50, and the demodulation unit 51 are communication units. It corresponds to the input side communication means. The gain adjusting unit 42 and the frequency characteristic adjusting unit 43 correspond to characteristic adjusting means. The base station side communication unit 62 in the base station communication device 32 corresponds to an output side communication unit, and the data input unit 67 corresponds to a parameter input unit. The base station side control unit 66 in the base station communication device 32 corresponds to a control unit, the speaker 63 corresponds to an audio output unit, and the base station side storage unit 65 corresponds to a storage unit.

  FIG. 3 is a flowchart showing the processing procedure of the mobile station side control unit 53 regarding the adjustment processing of the audio characteristics of the audio signal representing the audio input to the microphone 41. The mobile station communication device 31 is powered on and activated, and the voice characteristic adjustment process starts under the condition that the call start key is operated. The voice characteristic adjustment processing is executed by the mobile station side control unit 53. After the start of the sound characteristic adjustment process, the process proceeds to step a1.

  In step a1, an audio signal representing the audio input by the microphone 41 is transmitted from the mobile station antenna 49 to the base station communication device 32 via the high frequency transmitter 48, and the process proceeds to step a2. In step a2, it is determined whether or not a voice parameter representing the voice characteristics of the voice signal is stored in the mobile station side storage unit 56. If stored, the process proceeds to step a3, and if not stored, step a7 is performed. Migrate to

  In step a3, the voice parameter is read from the mobile station side storage unit 56, and the process proceeds to step a4. In step a4, the gain adjustment unit 42 adjusts the gain of the audio signal given from the microphone 41 based on the audio parameter read from the mobile station side storage unit 56, specifically, gain data, and based on the frequency characteristic data. The frequency characteristic adjusting unit 43 adjusts the frequency characteristic of the audio signal given from the microphone 41, and the process proceeds to step a5.

  In step a5, it is determined whether or not the call end key is operated. If it is operated, the process proceeds to step a6, and if not operated, the process waits until it is operated. Until the call end key is operated, an audio signal representing the audio input by the microphone 41 can be transmitted to the base station communication device 32.

  In step a 6, call termination information indicating termination of the call with the user of the base station communication device 32 is transmitted from the mobile station antenna 49 to the base station communication device 32 via the high frequency transmission unit 48. After the processing of step a6 is completed, all processing procedures are terminated.

  In step a7, it is determined whether or not a voice parameter is received by the mobile station antenna 49. If received, the process proceeds to step a8, and if not received, the process proceeds to step a9. In step a8, the gain adjustment unit 42 adjusts the gain of the audio signal given from the microphone 41 based on the audio parameter received by the mobile station antenna 49, specifically, the gain data, and based on the frequency characteristic data, The frequency characteristic adjustment unit 43 adjusts the frequency characteristic of the audio signal given from the microphone 41, and the process proceeds to step a9.

  In step a9, it is determined whether or not the call end key has been operated. If it has been operated, the process proceeds to step a10, and if not, the process returns to step a7.

  In step a10, call termination information indicating termination of the call with the user of the base station communication device 32 is transmitted from the mobile station antenna 49 to the base station communication device 32 via the high frequency transmission unit 48, Move to a11. In step a11, the voice parameter received by the mobile station antenna 49 is stored in the mobile station storage unit 56. After the processing of step a11 is completed, all processing procedures are completed. Step a1 in the flowchart shown in FIG. 3 corresponds to a voice input process, and steps a4 and a8 correspond to a characteristic adjustment process.

  FIG. 4 is a flowchart showing a processing procedure of the base station side control unit 66 regarding the voice parameter transmission processing. The voice parameter transmission process starts under the condition that the base station communication device 32 is powered on and activated. The voice parameter transmission process is executed by the base station side controller 66. After the voice parameter transmission process is started, the process proceeds to step b1.

  In step b1, it is determined whether or not an audio signal is received by the base station antenna 61. If received, the process proceeds to step b2, and if not received, all processing procedures are terminated. In step b2, the voice represented by the voice signal received by the base station antenna 61 is output from the speaker 63, and the process proceeds to step b3.

  In step b3, it is determined whether or not a voice parameter is input by the data input unit 67. If it is input, the process proceeds to step b4, and if not input, the process proceeds to step b5. In step b4, the voice parameter input by the data input unit 67 is transmitted from the base station antenna 61 to the mobile station communication device 31 via the base station side communication unit 62, and the process proceeds to step b5.

  In step b5, it is determined whether or not the call end information is received by the base station antenna 61. If received, all processing procedures are terminated. If not received, the process returns to step b3.

  As described above, according to the mobile station communication device 31 and the communication method of the present embodiment, the mobile station antenna 49 and the high-frequency receiving unit 50 are connected to the base station communication device 32 which is another communication device. Is received, and specifically, gain data and frequency characteristic data are received. Based on the received voice parameter, the voice characteristic of the voice signal representing the voice input by the microphone 41, specifically the voice signal. Is adjusted by the gain adjusting unit 42, and the frequency characteristic of the audio signal is adjusted by the frequency characteristic adjusting unit 43.

  Accordingly, the mobile station communication device 31 transmits the audio signal whose audio characteristics have been adjusted by the gain adjustment unit 42 and the frequency characteristic adjustment unit 43 to the base station communication device 32, for example, so that the audio characteristics of the base station communication device 32 are improved. The adjusted audio signal is received, and the audio represented by the received audio signal can be output from the speaker 63.

  Therefore, the quality of the sound output from the speaker 63 of the base station communication device 32 is compared with the sound represented by the sound signal before the sound characteristics are adjusted by the gain adjustment unit 42 and the frequency characteristic adjustment unit 43 of the mobile station communication device 31. Can be improved.

  As a result, the user of the base station communication device 32 is compared with the case where the voice represented by the voice signal before the voice characteristic is adjusted by the gain adjustment unit 42 and the frequency characteristic adjustment unit 43 of the mobile station communication device 31 is output. Since the sound output from the speaker 63 can be easily heard, the convenience of the user of the base station communication device 32 can be improved.

  As described above, according to the communication system 30 of the present embodiment, the voice parameters representing the voice characteristics of the voice signal, specifically the gain data and the frequency characteristic data, are input by the data input unit 67 of the base station communication device 32. Then, the base station side communication unit 62 is controlled by the base station side control unit 66 so as to transmit the input voice parameter to the mobile station communication device 31. When the mobile station antenna 49 and the high-frequency receiving unit 50 of the mobile station communication device 31 receive a voice parameter representing the voice characteristics of the voice signal from the base station communication device 32, the microphone 41 uses the received voice parameter. The sound characteristic of the sound signal representing the input sound, specifically, the gain of the sound signal is adjusted by the gain adjusting unit 42, and the frequency characteristic of the sound signal is adjusted by the frequency characteristic adjusting unit 43.

  Accordingly, the mobile station communication device 31 transmits the audio signal, whose gain is adjusted by the gain adjustment unit 42 and whose frequency characteristic is adjusted by the frequency characteristic adjustment unit 43, to the base station communication device 32, so that the base station communication device 32. Then, it is possible to receive an audio signal in which the gain and frequency characteristics, which are audio characteristics of the audio signal, are adjusted, and output the audio represented by the received audio signal from the speaker 63.

  Accordingly, the sound quality of the sound output from the speaker 63 of the base station communication device 32 is represented by the sound signal before the gain and frequency characteristics are adjusted by the gain adjustment unit 42 and the frequency characteristic adjustment unit 43 of the mobile station communication device 31. Compared to As a result, the user of the base station communication device 32 outputs the sound represented by the sound signal before the gain and frequency characteristics are adjusted by the gain adjustment unit 42 and the frequency characteristic adjustment unit 43 of the mobile station communication device 31 from the speaker 63. Compared with the case where it is, it becomes easy to hear the sound output from the speaker 63, so that the convenience of the user of the base station communication device 32 can be improved.

  FIG. 5 is a flowchart showing the processing procedure of the mobile station side control unit 53 regarding the adjustment processing of the audio characteristics of the audio signal representing the audio input to the microphone 41. The voice characteristic adjustment process starts under the condition that the mobile station communication device 31 is powered on and activated. The voice characteristic adjustment processing is executed by the mobile station side control unit 53. After the start of the sound characteristic adjustment process, the process proceeds to step c1.

  In step c1, at least one of user data, environmental data, and type data is transmitted from the mobile station antenna 49 to the base station communication device 32 via the high frequency transmitter 48, and the process proceeds to step c2. .

  In step c2, it is determined whether or not the voice parameter is received by the mobile station antenna 49. If it is received, the process proceeds to step c3, and if it is not received, it waits until it is received.

  In step c3, the gain adjustment unit 42 adjusts the gain of the audio signal given from the microphone 41 based on the audio parameter received by the mobile station antenna 49, specifically, gain data, and based on the frequency characteristic data, The frequency characteristic adjustment unit 43 adjusts the frequency characteristic of the audio signal supplied from the microphone 41. After the processing of step c3 is completed, all processing procedures are completed. Step c3 in the flowchart shown in FIG. 5 corresponds to a characteristic adjustment step.

  FIG. 6 is a flowchart showing a processing procedure of the base station side control unit 66 regarding the voice parameter transmission processing. The voice parameter transmission process starts under the condition that the base station communication device 32 is powered on and activated. The voice parameter transmission process is executed by the base station side controller 66. After the voice parameter transmission process is started, the process proceeds to step d1.

  In step d1, it is determined whether or not at least one of user data, environmental data, and type data is received by the base station antenna 61. If received, the process proceeds to step d2, and reception is performed. If not, all processing procedures are terminated.

  In step d2, a voice parameter associated with at least one of user data, environmental data and type data received by the base station antenna 61 is read from the base station side storage unit 65, and step d3 Migrate to

  In step d3, the voice parameter read from the base station side storage unit 65 is transmitted from the base station antenna 61 to the mobile station communication device 31 via the base station side communication unit 62. After the processing of step d3 is completed, all processing procedures are completed.

  As described above, according to the communication system 30 of the present embodiment, the base station side storage unit 65 of the base station communication device 32 stores the user data, environment data, and type data of the mobile station communication device 31, and these data. Voice parameters for adjusting the voice characteristics of the voice signal corresponding to the data and representing the voice input by the microphone 41 are stored. When the base station communication device 32 receives at least one of user data, environment data, and type data transmitted from the mobile station communication device 31, the base station side communication unit 62 adds the received data to the received data. Control is performed by the base station side control unit 66 so that the associated voice parameter is read from the base station side storage unit 65 and transmitted to the mobile station communication device 31.

  When the mobile station antenna 49 and the high frequency receiving unit 50 receive a voice parameter representing the voice characteristics of the voice signal from the base station communication apparatus 32, the mobile station communication device 31 uses the microphone 41 based on the received voice parameter. Is adjusted by the gain adjusting unit, and the frequency characteristic of the audio signal is adjusted by the frequency characteristic adjusting unit 43.

  Therefore, the mobile station communication device 31 can adjust the gain and frequency characteristics of the audio signal representing the audio input by the microphone 41 based on the audio parameters according to the user, the usage environment, and the type of the microphone 41. Therefore, the mobile station communication device 3 transmits to the base station communication device 32 the audio signal whose gain and frequency characteristics are adjusted according to the user of the mobile station communication device 31, the usage environment, and the type of the microphone 41 as described above. As a result, the base station communication device 32 can receive the audio signal from the mobile station communication device 31 and output the audio represented by the received audio signal from the speaker 63.

  As a result, the user of the base station communication device 32 adjusts the gain and frequency characteristics according to the sound output from the speaker 63, specifically, the user of the mobile station communication device 31, the usage environment, and the type of the microphone 41. You can hear the voice represented by the voice signal.

  As a result, the quality of the sound output from the speaker 63 of the base station communication device 32 is represented by the sound signal before the gain and frequency characteristics are adjusted by the gain adjustment unit 42 and the frequency characteristic adjustment unit 43 of the mobile station communication device 31. It can be improved compared to voice. As a result, the user of the base station communication device 32 outputs the sound represented by the sound signal before the gain and frequency characteristics are adjusted by the gain adjustment unit 42 and the frequency characteristic adjustment unit 43 of the mobile station communication device 31 from the speaker 63. Compared to the case where the sound is output, the sound output from the speaker 63 can be heard more easily. As a result, the convenience of the user of the base station communication device 32 can be significantly improved.

  In the embodiment shown in FIG. 2 described above, the mobile station communication device 31 mounted on the vehicle and configured to be movable and the base station communication device 32 provided in the dispatch center are configured to be capable of wireless communication with each other. However, the configuration of the communication system 30 is not necessarily limited to such a configuration. A communication system according to another embodiment of the present invention includes a one-side mobile station communication device that is mounted on a vehicle and configured to be movable, and the other-side mobile station communication device. You may be comprised so that mutual radio | wireless communication is possible.

  Next, a communication system according to another embodiment of the present invention in which the one-side mobile station communication device and the other-side mobile station communication device are configured to be able to perform wireless communication with each other will be described. Since the configuration of each mobile station communication device is similar to the mobile station communication device 31 of the embodiment shown in FIG. 2, the corresponding components are described with the same reference numerals.

  Each mobile station communication device that constructs the communication system according to the present embodiment includes a speaker that outputs voice, a data input unit that receives voice parameters, in addition to the configuration of the mobile station communication device 31 according to the above-described embodiment. It is the structure provided with. In the present embodiment, the audio signal received by the mobile station antenna 49 is demodulated by the demodulator 51 and applied to the speaker 63, and the audio represented by the audio signal is output from the speaker 63.

  In the following description of the communication system, a control unit that controls each hardware resource constituting the one-side mobile station communication device is referred to as “one-side mobile station control unit”, and each hardware that constitutes the other-side mobile station communication device. The control unit that controls the resource is referred to as the “other-side mobile station control unit”. The storage unit of the one-side mobile station communication device is referred to as “one-side mobile station storage unit”, and the storage unit of the other-side mobile station communication device is referred to as “other-side mobile station storage unit”.

  FIG. 7 is a flowchart showing the processing procedure of the one-side mobile station control unit regarding the adjustment processing of the audio characteristics of the audio signal representing the audio input to the microphone 41. The sound characteristic adjustment process starts under the condition that the mobile station communication device 31 is powered on and activated. The voice characteristic adjustment process is executed by the one-side mobile station controller. After the start of the sound characteristic adjustment process, the process proceeds to step e1.

  In step e1, user data representing the user of the one-side mobile station communication device, specifically crew number data, is transmitted from the mobile station antenna to the other-side mobile station communication device via the high-frequency transmission unit 48. The process proceeds to step e2. In step e2, an audio signal representing the sound input by the microphone 41 is transmitted from the mobile station antenna to the other mobile station communication device via the high frequency transmission unit 48 via the high frequency transmission unit 48, and then to step e3. Transition.

  In step e3, it is determined whether or not the voice parameter corresponding to the user data is stored in the one-side mobile station storage unit. If stored, the process proceeds to step e4. If not stored, the process proceeds to step e8. Transition.

  In step e4, the voice parameter corresponding to the user data is read from the one-side mobile station storage unit, and the process proceeds to step e5. In step e5, the gain adjusting unit 42 adjusts the gain of the audio signal provided from the microphone 41 based on the audio parameter read from the one-side mobile station storage unit, specifically, gain data, and based on the frequency characteristic data. The frequency characteristic adjusting unit 43 adjusts the frequency characteristic of the audio signal given from the microphone 41, and the process proceeds to step e6.

  In step e6, it is determined whether or not the call end key is operated. If it is operated, the process proceeds to step e7, and if not operated, the process waits until it is operated. Until the call end key is operated, an audio signal representing the audio input by the microphone 41 can be transmitted to the other-side mobile station communication device.

  In step e7, call termination information indicating termination of the call with the user of the other mobile station communication device is transmitted from the mobile station antenna 49 to the other mobile station communication device via the high frequency transmitter 48. After the processing of step e7 is completed, all processing procedures are terminated.

  In step e8, it is determined whether or not a voice parameter is received by the mobile station antenna 49. If it is received, the process proceeds to step e9, and if not received, the process proceeds to step e10. In step e9, the gain adjusting unit 42 adjusts the gain of the audio signal provided from the microphone 41 based on the audio parameter received by the mobile station antenna 49, specifically, gain data, and based on the frequency characteristic data, The frequency characteristic adjustment unit 43 adjusts the frequency characteristic of the audio signal supplied from the microphone 41, and the process proceeds to step e10.

  In step e10, it is determined whether or not the call end key has been operated. If it has been operated, the process proceeds to step e11. If not, the process returns to step e8.

  In step e11, call termination information indicating termination of the call with the user of the other mobile station communication device is transmitted from the mobile station antenna 49 to the other mobile station communication device 31 via the high frequency transmitter 48. Then, the process proceeds to step e12. In step e12, the user data of the other side mobile station communication device and the voice parameter received by the mobile station antenna 49 are associated with each other and stored in the one side mobile station storage unit. After the processing of step e12 is completed, all processing procedures are terminated. Step e2 in the flowchart shown in FIG. 7 corresponds to a voice input process, and steps e5 and e9 correspond to a characteristic adjustment process.

  FIG. 8 is a flowchart showing the processing procedure of the mobile station control unit on the other side regarding the voice parameter transmission processing. The voice parameter transmission process starts under the condition that the other-side mobile station communication device is powered on and activated. The voice parameter transmission process is executed by the other-side mobile station controller. After the voice parameter transmission process is started, the process proceeds to step f1.

  In step f1, it is determined whether or not an audio signal is received by the mobile station antenna 49. If it has been received, the process proceeds to step f2, and if not, all processing procedures are terminated. In step f2, the voice represented by the voice signal received by the mobile station antenna 49 is output from the speaker 63, and the process proceeds to step f3.

  In step f3, it is determined whether or not the user data of the one-side mobile station communication device is received and the voice parameter is input by the data input unit 67. If the condition is satisfied, the process proceeds to step f4. If not, the process proceeds to step f5. In step f4, the voice parameter input by the data input unit 67 is transmitted from the mobile station antenna 49 to the one-side mobile station communication device via the high frequency transmission unit 48, and the process proceeds to step f5.

  In step f5, it is determined whether or not the call termination information is received by the mobile station antenna 49. If received, all processing procedures are terminated. If not received, the process returns to step f3.

  As described above, according to the communication device and the communication method of the present embodiment, the voice parameter representing the voice characteristics of the voice signal, specifically the gain data and the frequency characteristic data, by the data input unit 67 of the other-side mobile station communication device. Is input, the high-frequency transmission unit 48 is controlled by the other-side mobile station control unit so as to transmit the input voice parameter to the one-side mobile station communication device. When the mobile station antenna 49 and the high-frequency receiving unit 50 of the one-side mobile station communication device receive a voice parameter representing the voice characteristics of the voice signal from the other-side mobile station communication device, the microphone is based on the received voice parameter. The sound characteristic of the sound signal representing the sound input by the input unit 41, specifically, the gain of the sound signal is adjusted by the gain adjusting unit 42, and the frequency characteristic of the sound signal is adjusted by the frequency characteristic adjusting unit 43.

  Accordingly, the one-side mobile station communication device transmits the voice signal whose gain is adjusted by the gain adjusting unit 42 and whose frequency characteristic is adjusted by the frequency characteristic adjusting unit 43 to the other-side mobile station communication device, thereby moving the other-side mobile station communication device. The station communication apparatus can receive an audio signal in which the gain and frequency characteristics, which are audio characteristics of the audio signal, are adjusted, and output the audio represented by the received audio signal from the speaker 63.

  Therefore, the quality of the sound output from the speaker 63 of the other-side mobile station communication device is determined based on the sound signal before the gain and frequency characteristics are adjusted by the gain adjusting unit 42 and the frequency characteristic adjusting unit 43 of the one-side mobile station communication device. It can improve compared to the voice that represents.

  As a result, the user of the other mobile station communication device can hear from the speaker 63 the voice represented by the audio signal before the gain and frequency characteristics are adjusted by the gain adjusting unit 42 and the frequency characteristic adjusting unit 43 of the one mobile station communication device. Compared with the case where it is output, since it becomes easier to hear the sound output from the speaker 63, the convenience of the user of the other-side mobile station communication device can be improved.

It is a block diagram which simplifies and shows the structure of the conventional digital radio | wireless machine 1. FIG. It is a block diagram which shows the electric constitution of the communication system 30 which is one Embodiment of this invention. 5 is a flowchart showing a processing procedure of a mobile station side control unit 53 regarding an adjustment process of audio characteristics of an audio signal representing audio input to a microphone 41. It is a flowchart which shows the process sequence of the base station side control part 66 regarding the transmission process of an audio | voice parameter. 5 is a flowchart showing a processing procedure of a mobile station side control unit 53 regarding an adjustment process of audio characteristics of an audio signal representing audio input to a microphone 41. It is a flowchart which shows the process sequence of the base station side control part 66 regarding the transmission process of an audio | voice parameter. 4 is a flowchart illustrating a processing procedure of a one-side mobile station control unit regarding an adjustment process of a voice characteristic of a voice signal representing a voice input to a microphone 41. It is a flowchart which shows the process sequence of the other side mobile station control part regarding the transmission process of an audio | voice parameter.

Explanation of symbols

DESCRIPTION OF SYMBOLS 30 Communication system 31 Mobile station communication apparatus 32 Base station communication apparatus 41 Microphone 42 Gain adjustment part 43 Frequency characteristic adjustment part 44 PCM codec part 46 Voice codec part 47 Digital modulation part 48 High frequency transmission part 49 Mobile station antenna 50 High frequency reception part 51 Demodulation unit 52 Mobile station side data processing unit 53 Mobile station side control unit 55 Data input / output unit 56 Mobile station side storage unit 61 Base station antenna 62 Base station side communication unit 63 Speaker 64 Base station side data processing unit 65 Base station side Storage unit 66 Base station side control unit 67 Data input unit

Claims (5)

Voice input means for converting voice to a signal and inputting it;
Communication means capable of communicating with other communication devices;
Characteristic adjusting means for adjusting the voice characteristic of the voice signal input by the voice input means based on the received voice parameter when the communication means receives the voice parameter representing the voice characteristic of the voice signal from another communication device; A communication device comprising:   When the communication means receives the voice parameter representing the gain and / or frequency characteristic of the voice signal, the characteristic adjusting means gains and / or the frequency characteristic of the voice signal input by the voice input means based on the received voice parameter. The communication device according to claim 1, wherein the communication device is adjusted. An audio input side communication device that receives voice converted into a signal and an audio output side communication device that converts the audio signal into voice and outputs the audio input side communication device and the audio output side communication device Are communication systems that can communicate with each other,
The voice input side communication device
Voice input means for converting voice to a signal and inputting it;
An input side communication means capable of communicating with the audio output side communication device;
When the input side communication unit receives a voice parameter representing the voice characteristic of the voice signal from the voice output side communication device, the characteristic adjustment is performed to adjust the voice characteristic of the voice signal input by the voice input unit based on the received voice parameter. Means and
The audio output side communication device
An output side communication means capable of communicating with the voice input side communication device;
Parameter input means for inputting voice parameters representing the voice characteristics of the voice signal;
Control means for controlling the output side communication means to transmit the voice parameter input by the parameter input means to the voice input side communication apparatus;
A communication system comprising: audio output means for outputting sound represented by the audio signal received by the output side communication means. The audio output side communication device
The voice characteristics of the voice signal input by the voice input means are respectively associated with the user data representing the user of the voice input side communication device, the environment data representing the use environment, and the type data representing the type of the voice input means. Storage means for storing voice parameters for adjustment;
The voice input side communication device transmits at least one of user data, environment data and type data to the voice output side communication device by the input side communication means,
When the output side communication means receives at least one of user data, environmental data, and type data, the control means of the voice output side communication device reads the voice parameter associated with the received data from the storage means. Control the output side communication means to transmit to the voice input side communication device,
The characteristic adjustment means of the voice input side communication device adjusts at least one of the gain and frequency characteristics of the voice signal input by the voice input means based on the voice parameter received by the input side communication means. The communication system according to claim 3. A voice input process of converting voice to a signal and inputting it;
A characteristic adjustment step of adjusting a voice characteristic of the voice signal input in the voice input step based on the received voice parameter when a voice parameter representing the voice characteristic of the voice signal is received from another communication device. A characteristic communication method.

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