JP4969429B2 - Sound equipment - Google Patents

Description

  The present invention relates to an audio device capable of adjusting the sound quality of an audio signal.

  As a conventional acoustic device, there is one disclosed in Patent Document 1. In the acoustic device of Patent Document 1, a subcode indicating a music pattern is assigned to a compact disc (hereinafter referred to as a CD), and coefficient data of a timbre mode corresponding to the music pattern specified based on the subcode is obtained. Sound quality adjustment is automatically performed using the coefficient data read from the coefficient table.

  For example, when playing CD music to which a subcode indicating that the music pattern is jazz mode is reproduced, the microcomputer of the audio device reads coefficient data corresponding to the jazz mode from the coefficient table based on the subcode. Then, digital equalization processing is executed using the read coefficient data. Thereby, music is reproduced with a tone color suitable for jazz.

Japanese Patent Application Laid-Open No. 7-58566

  It is known that the sound quality of reproduced sound is affected by acoustic characteristics due to the shape of the room in which the acoustic device is arranged, the interior material, and the like. For this reason, it is not possible to perform sufficient sound quality adjustment to obtain a desired sound quality only by specifying a music pattern as in Patent Document 1. For example, in an audio device mounted on a car, the sound quality is affected by the shape of the car cabin and the interior materials, so the sound quality adjustment data is suitable for the combination of the car room and the type of speaker that outputs the playback sound. If the sound quality is not adjusted, the desired sound quality cannot be obtained.

  Further, there are various types of vehicle interior shapes and interior materials depending on the type of automobile, and there are many types of speakers mounted in the vehicle interior, so there are various combinations of sound quality adjustment data. For this reason, when the user sets the sound quality adjustment data by operating the operation unit of the sound device every time the sound quality is adjusted, the optimum sound quality adjustment data cannot always be set, and the sound device is arranged. Sound quality suitable for the selected location and speaker type may not be obtained.

  In addition, sound quality adjustment data suitable for various combinations of condition contents such as the location where the sound apparatus is located and the type of speaker is prepared in advance, and the sound quality adjustment data that matches its own condition contents is stored in the sound apparatus. It is also possible to adjust the sound quality by setting. However, in this case, a digital input terminal for inputting sound quality adjustment data prepared in advance and an interface for external communication are newly required, and the specifications of the input terminal in the audio device must be greatly changed.

  The present invention has been made to solve the above-described problems, and provides an audio device that can adjust sound quality by inputting desired sound quality adjustment data from outside without changing the specifications of the input terminal. The purpose is to obtain.

An audio apparatus according to the present invention includes a storage unit that stores sound quality adjustment data, a sound quality adjustment unit that performs sound quality adjustment of an audio signal using the sound quality adjustment data read from the storage unit, and a sound quality adjustment unit. Search that specifies condition contents from a database that stores sound quality adjustment data that matches a plurality of combinations of condition contents in association with the condition contents including the vehicle type, sound device type, and speaker type in which the sound apparatus is mounted If the request key numbers match, a shall and a control unit for rewriting the content of the storage unit in the sound quality adjustment data output in response to a search request.

According to the present invention, the content of the storage unit storing the sound quality adjustment data used for the sound quality adjustment corresponds to the condition content including the vehicle type, the type of the audio device, and the type of the speaker on which the audio device having the sound quality adjustment unit is mounted. If the key number of the search request that specifies the condition contents matches from the database that stores the sound quality adjustment data that matches multiple combinations of the condition contents, the sound quality adjustment data that is output in response to the search request Since the data is rewritten, it is possible to know an input error of the condition contents such as the vehicle type, the audio model name, the speaker model name, and the like, and it is possible to prevent downloading of erroneous coefficient data not corresponding to the key number .

Embodiment 1 FIG.
FIG. 1 is a diagram showing the configuration of an audio device and a data server according to Embodiment 1 of the present invention. The audio device is connected from the data server 3 via a data relay personal computer 2 (hereinafter referred to as data relay PC 2). 1 shows a configuration for setting sound quality adjustment data. In FIG. 1, an acoustic device 1 includes an AM / FM receiving unit 4, a CD playback unit 5, an audio signal processing unit 6, a control unit (sound quality adjustment data rewrite processing unit) 7, an amplifier unit 8, and an A / D conversion unit 10. , An I / F driver 18, a band pass filter (BPF) 19, a changeover switch 20 and an operation unit 21.

  The AM / FM receiver 4 receives AM / FM broadcast waves. The CD playback unit 5 plays back the audio signal recorded on the CD. The control unit 7 is a component that controls the sound quality adjustment processing performed by the audio signal processing unit 6 and includes a microcomputer or the like. The amplifier unit 8 is connected to the speakers 9a and 9b, amplifies the audio signal input from the D / A conversion unit 15, and outputs the amplified audio signal to the speakers 9a and 9b. The A / D conversion unit 10 performs analog-to-digital conversion on an analog audio signal input from an AUX (AUXiliary) terminal 22.

  The audio signal processing unit 6 is a component that receives input of audio signals from the AM / FM receiving unit 4, the CD playback unit 5, and the A / D conversion unit 10, and adjusts the sound quality of the input audio signals. The circuit 12 includes a bus treble circuit 13, a delay unit 14, a D / A conversion unit 15, a waveform memory 16, and a coefficient memory 17.

  A DIR (Digital Audio Interface Receiver) 11 switches audio signals input from the AM / FM receiving unit 4, the CD playback unit 5, and the A / D conversion unit 10. The equalizer circuit 12 includes a plurality of digital parametric equalizers, and performs digital equalization processing of the audio signal using the coefficient data read from the coefficient memory 17.

  The bass treble circuit 13 adjusts the bass and treble levels of the audio signal. The delay unit 14 sets, in the audio signal, a delay time for correcting a time difference corresponding to a distance shift from the speakers 9a and 9b to the listening position. The D / A converter 15 performs digital-analog conversion of the audio signal read from the waveform memory 16. The waveform memory 16 is a storage unit that temporarily stores an audio signal, and the audio signal is read according to the delay time.

  The coefficient memory 17 stores coefficient data used for the sound quality adjustment of the audio signal by the audio signal processing unit 6. The coefficient data (sound quality adjustment data) stored in the coefficient memory 17 includes equalization coefficient data used for digital equalization of the equalizer circuit 12, bass treble values (bass / treble level) set by the bus treble circuit 13, and delay. There is a delay time set by the unit 14. In other words, in the present invention, not only digital equalization by the equalizer circuit 12 but also processing performed by the audio signal processing unit 6 including setting of the bus treble value by the bus treble circuit 13 and setting of the delay time by the delay unit 14 is performed. Treat as an adjustment process.

  The I / F driver 18 is an interface circuit for serial communication. In the following description, the I / F driver 18 converts the input signal into a signal conforming to the RS-232C standard and outputs the signal to the control unit 7. The band-pass filter (hereinafter referred to as BPF) 19 is, for example, an audio signal other than a serial communication signal (a signal to be converted into a signal of RS-232C standard) by appropriately selecting a pass band between 50 kHz and 30 MHz. Shut off. The changeover switch 20 is provided on a data reception signal line branched from an analog audio input signal line (analog signal line) that connects the AUX terminal 22 and the A / D conversion unit 10, and corresponds to a control signal from the control unit 7. Thus, the connection between the path of the data reception signal line connected to the AUX terminal 22 and the path of the data reception signal line from the BPF 19 to the control unit 7 is opened and closed.

  In addition, the changeover switch 20 may be configured such that the control unit 7 performs opening / closing control in conjunction with an opening / closing switch (not shown) provided outside the acoustic device 1. In addition, the opening / closing control of the changeover switch 20 may be performed in a specific operation mode by continuously pressing a plurality of specific buttons (not shown) provided on the operation unit 21. For example, a predetermined mode instruction signal is transmitted from the operation unit 21 to the control unit 7 by continuously pressing the specific button. When receiving the mode instruction signal, the control unit 7 performs control so as to alternately open and close the changeover switch 20.

  The operation unit 21 is a component for inputting instructions of various processes from the outside of the apparatus 1 and is realized as a means in which hardware such as operation buttons and a touch panel and software for setting input cooperate. The AUX terminal 22 is an input terminal for inputting an analog audio signal, and has three terminals of a left channel signal L, a right channel signal R, and a signal ground G. The path to the changeover switch 20 is connected to each of these three terminals.

  When each of the three terminal signal lines connected to the AUX terminal 22 is used as an RS-232C communication line, for example, the left channel signal L signal line is a TxD (transmission) line, and the right channel signal R signal line is RxD ( (Reception) line and signal ground are used as ground lines.

  The data relay PC 2 performs a process of downloading coefficient data for sound quality adjustment from the data server 3 via the Internet line and a process of transmitting the coefficient data to the audio device 1. The data relay PC 2 transmits the coefficient data to the audio device 1 through a communication path including a connector 23 connected to the AUX terminal 22 of the audio device 1, an interface circuit 24, an attenuator 25, and a line driver 26.

  Here, the interface circuit 24 is an interface circuit for serial communication, and converts an input signal into a signal conforming to the RS-232C standard. The attenuator 25 attenuates the communication signal transmitted to the AUX terminal 22 side. In the RS-232C standard, a signal having a voltage range of ± 15 V at the maximum and normally ± 12 V is used, but the input reference voltage of the AUX terminal 22 is ± 0.5 Vrms, and ± 2.0 Vrms at the maximum. For this reason, the attenuator 25 attenuates the voltage of the RS-232C standard communication signal to within the allowable input voltage range of the AUX terminal 22. The line driver 26 controls communication on the TxD (transmission) line and the RxD (reception) line.

  The data server 3 has various conditions such as the type of the acoustic device, the environment of the installation location (for example, the shape of the passenger compartment and the interior material are specified by the vehicle type), the type of speaker, and the music mode to be adjusted. Coefficient data for sound quality adjustment suitable for the combination is managed, and coefficient data according to an external request is provided to the acoustic device 1. In order to execute these processes, the data server 3 includes a communication processing unit 3a, a search processing unit 3b, and a database 3c.

  The communication processing unit 3a is a component that executes communication processing, and communicates with the data relay PC 2 via the Internet line. The search processing unit 3b searches the database 3c for coefficient data for sound quality adjustment corresponding to the search request received by the communication processing unit 3a. The database 3c stores coefficient data for sound quality adjustment adapted to various combinations of condition contents such as the type of acoustic device, the environment of the installation location, the type of speaker, and the music mode to be adjusted.

  FIG. 2 is a diagram showing an example of the contents of the coefficient memory in FIG. 1, and shows a case where the acoustic device 1 is applied to an in-vehicle acoustic device. As shown in FIG. 2, the coefficient data for sound quality adjustment is stored in the coefficient memory 17 in association with the vehicle model name, the number of channels, and the key number of the automobile on which the acoustic device 1 is mounted. In the example of FIG. 2, A-AU1SP2070613 is set in the KEY item of the car model name SEDN-A, the number of channels of four, and the key number.

  The key number is a code number indicating a combination of a manufacturing number of the acoustic device 1 or a vehicle type of the vehicle on which the acoustic device 1 is mounted, a model name of the acoustic device 1 (audio model name), and a speaker model name. For example, in the key number A-AU1SP2070613 shown in FIG. 2, the car model name is A, the audio model name is AU1, the speaker model name is SP2, and the manufacturing date is 070613 (June 13, 2007). ing.

  As the coefficient data, the gain (GAIN), delay time (Delay) for the signal for each channel, and the number of parametric filters used for equalization by the equalizer circuit 12 are set. For example, in channel number 1 shown in FIG. 2, the gain is 0 dB, the delay time is 0 ms, and the number of filters is 4. In channel number 2, the gain is lowered by 0.5 dB (−0.5 dB), and the delay time is 1. Processing for delaying 2 ms, the number of filters is 4.

Further, the center frequency (FRQ), Q value, and gain (GAIN) of the parametric filter are set as coefficient data of the parametric filter in the equalizer circuit 12. For example, filter numbers 1A to 1D are set for the four parametric filters used for the signal of channel number 1 shown in FIG. In the filter number 1A, a center frequency 3 5H z, Q value is 1, is set raise 3dB gain processing, the filter number 1B, the center frequency is 26 0H z, Q value is 2. 7. A process for lowering the gain by 3.5 dB (-3.5 dB) is set.

  Further, the coefficient data of the bus treble value is also stored in the coefficient memory 17. In the example shown in FIG. 2, for the left channel signal L, the processing for raising the frequency of the bus (bass) (BASS-L-FRQ) to 100 Hz and increasing the gain (BASS-L-GAIN) by 2 dB is set. A process is set in which the frequency (TRE-L-FRQ) of (treble) is 8000 Hz and the gain (TRE-L-GAIN) is 0 dB.

  The contents of the coefficient memory 17 shown in FIG. 2 can be appropriately rewritten by the user by inputting the coefficient data using the operation unit 21. In the following, in the database 3c of the data server 3, the key number, vehicle type (installation environment), audio type name (sound device type), speaker type name (speaker type), and music to be adjusted shown in FIG. An example will be described in which coefficient data for sound quality adjustment suitable for a plurality of combinations having a mode as a condition content is managed.

Next, the operation will be described.
(1) Operation during normal music playback When the sound device 1 is turned on, the control unit 7 sets the coefficient data of the parametric filter in the equalizer circuit 12 among the coefficient data for sound quality adjustment read from the coefficient memory 17. In addition, the delay time is set in the delay unit 14. The delay unit 14 writes the music signal in the waveform memory 16, reads out the music signal delayed by the delay time set from the control unit 7, and outputs the music signal to the D / A conversion unit 15. The D / A converter 15 D / A converts the music signal input from the waveform memory 16. The amplifier unit 8 amplifies the analog music signal input from the D / A conversion unit 15 and outputs the amplified signal to the speakers 9a and 9b. Thereby, music signals are emitted as sound waves from the speakers 9a and 9b.

  A case where a music signal recorded on a CD is reproduced will be described. When a CD is inserted into the disc drive (not shown) of the audio device 1, the CD playback unit 5 plays back a music signal from the CD. This music signal is output to the DIR 11 of the audio signal processing unit 6. The DIR 11 selects a music signal output from the CD reproducing unit 5 from the input signals and outputs the selected music signal to the equalizer circuit 12. In the equalizer circuit 12, the coefficient data of the parametric filter is set by the control unit 7 as described above, and the music signal is equalized with this coefficient data. The equalized music signal is sent to the delay unit 14 after the bass treble value is adjusted by the bass treble circuit 13. Subsequent processing is the same as the processing after power-on described above.

  When a music signal is input from the AUX terminal 22 in normal music playback, the path of the data reception signal line connected to the AUX terminal 22 by the changeover switch 20 and the path of the data reception signal line from the BPF 19 to the control unit 7 The connection with is left open (non-connected state). As a result, the music signal input from the AUX terminal 22 is input to the A / D conversion unit 10 via the analog audio input signal line and then sent to the DIR 11, and the music signal whose sound quality has been adjusted as described above is obtained. Sound waves are emitted from the speakers 9a and 9b.

(2) Operation when obtaining sound quality adjustment coefficient data from the data server The data relay PC 2 is connected to the Internet line via a communication processing unit such as a built-in modem (not shown), and the data on the Internet line. Access the server 3. At this time, the coefficient data selection screen program is transmitted from the communication processing unit 3a of the data server 3 to the browser of the data relay PC 2. When the data relay PC 2 executes this program, a GUI (Graphical User Interface) capable of requesting coefficient data search in conjunction with an input operation by an operation unit (not shown) of the data relay PC 2 becomes a data relay PC 2. Provided to.

  FIG. 3 is a diagram illustrating an example of the coefficient data selection screen. 3, on the coefficient data selection screen 27, text input boxes 28 to 31 and radio buttons (selection buttons) 32-1 to 32-N for selecting sound quality adjustment parameters of search results are shown in FIG. A key number input box 33 and radio buttons 34 and 35 indicating whether or not the selected coefficient data can be downloaded are displayed. The sound quality adjustment parameters include, for example, the channel number shown in FIG. 2 and the corresponding gain, delay time, number of filters, center frequency for each parametric filter, Q value, gain, and the like.

  In the coefficient data selection screen, an input operation using the operation unit of the data relay PC 2 allows a vehicle type in the text input box 28, a speaker type name in the text input box 29, an audio type name in the text input box 30, and a text input box 31. Enter the music mode (favorite music genre) as the condition. These pieces of input information are transmitted as search requests from the data relay PC 2 to the data server 3 via the Internet line.

  The search processing unit 3b of the data server 3 uses the condition contents (vehicle type, audio model name, speaker model name, music mode) specified in the search request from the data relay PC 2 received by the communication processing unit 3a. The database 3c is searched. Thereby, the sound quality adjustment parameter corresponding to the condition content of the search request data is searched. For example, when a music mode of a favorite genre is input to the text input box 31, a sound quality adjustment parameter suitable for this music genre is retrieved. The search processing unit 3b reads the parameter of the search result from the database 3c and transmits it to the data relay PC 2 via the communication processing unit 3a.

  In the data relay PC 2, the search result parameters received from the data server 3 are displayed on the radio buttons 32-1 to 32 -N on the coefficient data selection screen. In the input operation using the operation unit, the radio button of a desired parameter is selected from the parameters displayed on the radio buttons 32-1 to 32-N, and the radio button 34 indicating that download is possible is selected. A parameter coefficient data request is transmitted to the data server 3 via the Internet line. On the other hand, when the radio button 35 indicating that download is not possible is selected, the selection of the parameter radio button is released, and the radio button of the desired parameter can be selected from the parameters displayed in the radio buttons 32-1 to 32-N. Become.

  In the data server 3, when the communication processing unit 3a receives the coefficient data request from the data relay PC 2, it outputs it to the search processing unit 3b. The search processing unit 3b reads coefficient data corresponding to the coefficient data request from the database 3c, and transmits it to the data relay PC 2 via the communication processing unit 3a. Thereby, the data relay PC 2 can acquire the coefficient data for sound quality adjustment corresponding to the condition contents specified in the text input boxes 28 to 31.

  When the key number set in the content of the coefficient memory 17 of the audio device 1 is input to the input box 33 in addition to the text input boxes 28 to 31, the input information is transferred from the data relay PC 2 via the Internet line. It is transmitted to the server 3. In the data server 3, when the communication processing unit 3a receives the search request data including the key number from the data relay PC 2, the data is output to the search processing unit 3b.

  The database 3c of the data server 3 manages coefficient data for sound quality adjustment adapted to a combination of condition contents such as a vehicle type, an audio model name, and a speaker model name associated with a key number. When the search request data including the key number from the data relay PC 2 is input, the search processing unit 3b searches the database 3c for a combination of the condition contents corresponding to the key number, and the combination of the condition contents of the search result and the search The combination of the condition contents in the request data is compared, and it is determined whether or not the combination of the condition contents corresponding to the key number has been searched.

  When the determination result that the search is not made with the combination of the condition contents corresponding to the key number is obtained, the search processing unit 3b has made a search request for specifying the wrong condition contents via the communication processing unit 3a. Is notified to the data relay PC 2. By doing so, the data relay PC 2 side can know the input error of the condition contents such as the vehicle type, the audio model name, the speaker model name, etc., and prevent the downloading of erroneous coefficient data not corresponding to the key number. be able to.

(3) Operation when setting coefficient data for sound quality adjustment to the audio device First, the AUX terminal 22 of the audio device 1 and the connector 23 of the data relay PC 2 are connected, and the RS of the audio device 1 and the data relay PC 2 is connected. -232C communication path is connected. On the acoustic device 1 side, the operation unit 21 instructs the control unit 7 to receive coefficient data, and in response thereto, the control unit 7 controls the changeover switch 20 to be in a closed state (connected state). On the data relay PC 2 side, transmission of coefficient data via the RS-232C communication path is started by issuing a transmission instruction using an operation unit (not shown). As a result, the acoustic device 1 receives the coefficient data via the AUX terminal 22 and outputs the coefficient data to the control unit 7 via the BPF 19 and the I / F driver 18.

  FIG. 4 is a flowchart showing a flow of coefficient data transmission processing from the data relay PC in FIG. 1 to the audio device, and shows data transmission in asynchronous RS-232C communication. Explaining along this figure, the data relay PC 2 sequentially transmits the coefficient data downloaded from the data server 3 as 1-byte data for each parameter via the RS-232C communication path. For example, the model name, the number of channels, the gain of channel number 1, the delay time, the gain of channel number 2, the delay time, etc. as shown in FIG.

  On the other hand, when the control unit 7 of the audio device 1 enters the coefficient data reception mode as described above, the right channel signal that becomes the RxD (reception) line of the RS-232C communication among the signal lines connected to the AUX terminal 22. The voltage level of the R signal line is monitored to check the start bit of the signal received from the signal line (step ST1). For example, it is assumed that the value 0 of the start bit is confirmed when the voltage level of the RxD line is lowered to the low level. When the start bit is confirmed, the control unit 7 resets the timing for reading the signal from the RxD line (step ST2).

  Thereafter, the control unit 7 starts capturing coefficient data at regular intervals according to a predetermined communication speed set in advance in the RS-232C communication path via the AUX terminal 22 (step ST3). The control unit 7 calculates a parity bit from the fetched data, and compares the value of the calculated parity bit with a preset parity bit value to perform a parity check (step ST4). Here, when both do not correspond, the control part 7 complete | finishes data capture on the assumption that the parity error generate | occur | produced in the data transmission from PC2 for data relay (step ST6).

  When the parity check is normal, the control unit 7 checks the stop bit every time 1-byte data is received (step ST5). At this time, if the value 1 of the stop bit cannot be confirmed, the control unit 7 finishes the data capture on the assumption that a framing error has occurred in data transmission from the data relay PC 2 (step ST7).

  If the value 1 of the stop bit is confirmed in step ST5, the control unit 7 determines whether or not it is the last one byte data in the series of coefficient data (step ST8). For example, the last data can be confirmed by notifying the control unit 7 of how many bytes the coefficient data to be transmitted from the data relay PC 2 is.

  If it is not the last 1-byte data in step ST8, the control unit 7 returns to the process of step ST1, monitors the start bit, repeats the above-described process, and executes the next 1-byte data reception. If it is the last 1-byte data, it is assumed that all coefficient data has been received, and the data fetching process is terminated. Note that, when capturing is terminated due to a data transmission error, the control unit 7 may instruct re-transmission to the data relay PC 2.

  The control unit 7 transmits the received coefficient data to the coefficient memory 17 and rewrites the memory contents. The equalizer circuit 12, the bus treble circuit 13, and the delay unit 14 perform respective processes according to the contents of the coefficient memory 17 rewritten by the control unit 7. As a result, the acoustic device 1 can obtain coefficient data suitable for a combination of condition contents such as a vehicle type (installation environment), an audio model name (a type of the acoustic device), a speaker model name (a type of speaker), and a music mode to be adjusted. It is possible to perform sound quality adjustment processing.

Although FIG. 1 shows a configuration in which coefficient data is received via a communication path via an AUX terminal 22 for inputting an analog audio signal, communication via another existing analog input terminal of the acoustic device 1 is shown. The coefficient data may be received through a route.
FIG. 5 is a diagram illustrating another example of the coefficient data reception path in the audio apparatus according to Embodiment 1, and illustrates a case where the speaker output line from the amplifier unit to the speaker output terminal to which the speaker is connected is handled as the coefficient data reception path. Show.

  In FIG. 5, an amplifier unit 8a is an amplifier for L channels, and an amplifier input terminal 36 is a terminal for inputting an L channel audio signal from the D / A converter 15 to the amplifier unit 8a. The amplifier unit 8a is connected to a speaker output terminal 38 via a speaker output line (analog signal line) 37 for sending an analog signal to the speaker. The changeover switch 20 a is connected to two lines corresponding to the polarity of the speaker output line 37, and opens and closes the connection with the subsequent band-pass filter (BPF) 18 in accordance with control from the control unit 7. Since other configurations operate in the same manner as in FIG. 1, description thereof is omitted.

  When the coefficient data is transmitted from the data relay PC 2 to the audio device 1, the speaker output terminal 38 of the audio device 1 and the connector 23 of the data relay PC 2 are connected to perform RS-232C communication between the audio device 1 and the data relay PC 2. Connect the route. On the acoustic device 1 side, the operation unit 21 instructs the control unit 7 to receive coefficient data, and in response thereto, the control unit 7 controls the changeover switch 20a to be in a closed state (connected state).

  On the data relay PC 2 side, transmission processing of coefficient data via the RS-232C communication path is started by issuing a transmission instruction using an operation unit (not shown). As a result, in the acoustic device 1, coefficient data is received via the speaker output terminal 38 and is output to the control unit 7 via the BPF 19 and the I / F driver 18. With this configuration, even for an audio device that is not equipped with the AUX terminal 22 that is an analog audio input terminal, it is possible to receive coefficient data without changing the input terminal specification.

  As described above, according to the first embodiment, the coefficient memory 17 that stores the sound quality adjustment data and the equalizer that adjusts the sound quality of the audio signal using the sound quality adjustment data read from the coefficient memory 17. The audio signal processing unit 6 including the circuit 12, the data reception communication line branched from the analog signal line connected to the AUX terminal 22, and the sound quality adjustment data received via the AUX terminal 22 and the data reception communication line Since the controller 7 that rewrites the contents of the coefficient memory 17 is provided, it is possible to adjust the sound quality by inputting desired sound quality adjustment data from the outside without changing the specifications of the input terminal.

  Further, according to the first embodiment, the control unit 7 stores the coefficient memory with the sound quality adjustment data received via the data reception communication line branched from the speaker output terminal 38 and the speaker output line 37 connected thereto. Since the content of 17 is rewritten, the sound quality adjustment can be performed by inputting desired sound quality adjustment data from the outside without changing the specifications of the input terminal, as described above.

  Further, according to the first embodiment, the control unit 7 is adapted to a plurality of combinations of the condition contents in association with the condition contents including the vehicle type on which the audio apparatus 1 is mounted, the type of the audio apparatus 1 and the type of the speaker. Since the contents of the coefficient memory 17 are rewritten from the database 3c storing the sound quality adjustment data with the sound quality adjustment data searched in response to the search request specifying the condition contents, the automobile, the sound apparatus, and the speaker to which the sound apparatus is attached are replaced. Thus, even when the sound quality is adjusted with these new combinations, the sound quality can be adjusted with the sound quality adjustment data suitable for the combination.

  In the first embodiment, the user of the audio device 1 inputs search data for coefficient data for sound quality adjustment using the operation unit of the data relay PC 2, and the coefficient data corresponding thereto is input to the data relay PC 2. Although the configuration for downloading is shown, the present invention is not limited to this. For example, a communication path of the RS-232C standard is provided in the data server 3, the data server 3 and the audio device 1 are directly connected without using the data relay PC 2, and the audio device 1 is used for sound quality adjustment from the data server 3. The coefficient data may be downloaded. In this case, a search request is transmitted from the control unit 7 of the acoustic device 1 to the data server 3 via the TxD line, and the coefficient data of the search result is obtained via the RxD line accordingly.

  In the above-described embodiment, an example is shown in which the key number is configured by combining the model name of the sound device and the manufacturing number, but it may also be configured by adding text information for identifying an individual or information on the vehicle to be mounted. Good. For example, a name is often used as text information for identifying an individual. The information attached to the automobile includes a chassis number, a VIN (Vehicle Identification Number), or a number plate.

  The above information is information unique to each vehicle, and can identify the vehicle type and individual vehicle and its owner. The domestic chassis number is represented as, for example, chassis type AA1BBXXXXXX (XXXXXXXXX is a 7-digit numerical value). A 17-digit VIN is, for example, AB1CD2345EXXXXXXXXXX (XXXXXXXXX is an 8-digit numerical value). Domestic license plates are represented by place names, classification numbers, hiragana and 4-digit numbers, so they are, for example, Sapporo 500 XXXX (XXXX is a 4-digit number).

  FIG. 6 is a diagram showing the contents of the coefficient memory using the above information as a key, and shows a case where the sound quality adjustment data is stored in association with the key number Key1 and the chassis number Key2 of the acoustic device. In the acoustic device 1 having a digital communication interface in the vehicle in advance such as a CAN (Controller Area Network), both the key numbers Key1 and Key2 can be stored in the acoustic device when mounted on the automobile. In the audio device 1 that does not have a digital communication interface, the car owner or seller stores the number obtained from the vehicle verification in the audio device 1 by the method described in the above embodiment. When the vehicle type and the combination with the speaker are changed, the key number Key1 is rewritten by the same means as described above.

  FIG. 7 is a diagram illustrating an example of a coefficient data selection screen having input boxes for two key numbers. 7, on the coefficient data selection screen, in addition to the input boxes and buttons shown in FIG. 3, an input box 39 for inputting the first key number Key1 and an input box 40 for inputting the second key number Key2 are displayed. A password input box 41 and a registration button 42 for registering the key number in the data server 3 are displayed.

  When the key numbers Key1 and Key2 are respectively input to the input boxes 39 and 40 and the registration button 42 is selected, the Key1 and Key2 are associated with each other and stored in the database 3c. At this time, if a password is entered in the password input box 41 and the registration button 42 is selected, a third party cannot change the contents of Key1 and Key2 without permission, so Key1 associated with Key2 that is unique information of the car. It is possible to protect the contents. For the password, use any text characters, letters or numbers that include a part of the license plate. For example, if the license plate is Sapporo 500XXXX (XXXX is a 4-digit number), use satsuXXXXXX or saXXXX as the password. Also good.

  In the coefficient data selection screen of FIG. 7, when the vehicle type, speaker type name, audio type name, and key numbers Key1 and Key2 are input as conditions, the search processing unit 3b of the data server 3 searches using the above conditions, and this condition The sound quality adjustment parameter corresponding to is searched. The sound quality adjustment parameter obtained as a search result is stored in the database 3c in association with the car-specific key number Key2. As a result, the data server 3 can be configured to store and read the music mode (preferred music genre) and download history in association with the key number unique to the car.

  The music mode and download history associated with the key number Key2 are information on what kind of music the user likes and uses the sound quality adjustment parameters depending on the specific car. The coefficient data shown in FIG. 7 is used when the sound quality adjustment parameter that matches the vehicle type / acoustic device / speaker combination is selected as the highest parameter in the music genre of choice based on the stored information when the vehicle is replaced or the vehicle type is changed. It is displayed in the parameter box 32-1 in the selection screen. Note that the top parameter box may be highlighted by blinking, changing the color, changing the size, or the like.

  In addition, since the registrant or car is specified on the coefficient data selection screen, a service that allows free download of coefficient parameters for a certain period after registration, for example, one year, or new product information is given priority. It is used to provide it. Furthermore, the audio device manufacturer and the speaker product manufacturer jointly use the information on the combination of the audio device and the speaker to provide new speaker information suitable for the newly released audio device.

  Used by automakers / automobile dealers and audio equipment manufacturers to jointly provide product information and services to registrants using combinations of their products. By combining the sound device and the key number unique to the car, automakers, car dealers, sound equipment / speaker product manufacturers, and dealers can identify users of their products, and information and services limited to those users There is an advantage that can be provided.

It is a figure which shows the structure of the audio equipment and data server by Embodiment 1 of this invention. It is a figure which shows an example of the content of the coefficient memory in FIG. It is a figure which shows an example of a coefficient data selection screen. It is a flowchart which shows the flow of the coefficient data transmission process from PC for data relay in FIG. 1 to an audio equipment. It is a figure which shows the other example of the coefficient data receiving path | route in the audio equipment by Embodiment 1. It is a figure which shows the other example of the content of a coefficient memory. It is a figure which shows the other example of a coefficient data selection screen.

Explanation of symbols

  1 audio equipment, 2 data relay PC, 3 data server, 3a communication processing unit, 3b search processing unit, 3c database, 4 AM / FM receiving unit, 5 CD playback unit, 6 audio signal processing unit, 7 control unit (sound quality Adjustment data rewrite processing unit), 8, 8a amplifier unit, 9a, 9b speaker, 10 A / D conversion unit, 11 DIR, 12 equalizer circuit, 13 bus treble circuit, 14 delay unit, 15 D / A conversion unit, 16 waveform memory, 17 coefficient memory, 18 I / F driver, 19 band pass filter (BPF), 20, 20a selector switch, 21 operation unit, 22 AUX terminal (analog input terminal), 23 connector, 24 interface circuit (I / F circuit), 25 attenuator, 26 line driver, 27 coefficient data selection screen, 28-31 Kist input box, 32-1 to 32-N, 34, 35 radio button, 33, 39, 40, 41 input box, 36 amplifier input terminal, 37 speaker output line (analog signal line), 38 speaker output terminal, 42 registration button.

Claims (3)

A storage unit for storing sound quality adjustment data;
Using the sound quality adjustment data read from the storage unit, a sound quality adjustment unit for adjusting the sound quality of the audio signal;
From a database that stores sound quality adjustment data adapted to a plurality of combinations of the condition contents in association with the condition contents including the vehicle type, the type of the sound apparatus, and the type of the speaker on which the sound apparatus having the sound quality adjusting unit is mounted.
And a control unit that rewrites the content of the storage unit with sound quality adjustment data output in response to the search request when the key numbers of the search request for specifying the condition content match. apparatus. A storage unit for storing sound quality adjustment data;
  Using the sound quality adjustment data read from the storage unit, a sound quality adjustment unit for adjusting the sound quality of the audio signal;
  From a database storing sound quality adjustment data adapted to a plurality of combinations of the condition contents in association with the condition contents including the vehicle type, the type of the sound apparatus, and the type of the speaker on which the acoustic apparatus having the acoustic adjustment unit is mounted.
  When the first key number of the search request designating the condition content matches, the content of the storage unit is rewritten with the sound quality adjustment data output in response to the search request, and the vehicle-specific first number is rewritten. And a control unit that stores a download history associated with the key number of 2. The acoustic device according to claim 1, wherein the control unit directly downloads the sound quality adjustment data from a data server that stores the database.

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