JP2013135320A - Frequency characteristic adjustment system and frequency characteristic adjustment method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a frequency characteristic adjustment system and a frequency characteristic adjustment method allowing frequency characteristic adjustment of acoustic devices to be easily performed at a low cost even with various system constitution devices kept at present processing performance levels.SOLUTION: A frequency characteristic adjustment system includes an acoustic device and an information processor. The acoustic device, connected to a portable terminal for collecting sounds via network, emits sounds of sound signals for measurement from a speaker in response to a reproduction request of sound signals for measurement originated from the portable terminal, and sets a parameter transmitted from the portable terminal to a frequency characteristic adjustment part for adjusting a frequency characteristic of the sound signals supplied to the speaker. The information processor, connected to the portable terminal via network, receives sound data for reproducing the sound signals for measurement collected by a sound collection part of the portable terminal from the portable terminal, analyzes the frequency characteristic of the sound data to generate a parameter to be set with the frequency characteristic adjustment part so that the frequency characteristic of the sound data analyzed becomes a frequency characteristic desired, and transmits the parameter generated to the portable terminal.

Description

  Embodiments described herein relate generally to a frequency characteristic adjustment system and a frequency characteristic adjustment method.

  2. Description of the Related Art Conventionally, there has been disclosed a technique for collecting a test sound emitted from a speaker of an electronic device, measuring a frequency characteristic, and correcting the frequency characteristic to a target characteristic based on the measurement result.

JP 2001-197585 A

  In the prior art, a microphone that collects the test sound, a spectrum analyzer that analyzes the frequency characteristics of the collected sound, and an adjustment parameter generation device that generates parameters for correcting the frequency characteristics to the target characteristics are required. A dedicated measuring device with built-in was used.

  However, when a dedicated measuring device is used, there are problems in terms of cost, processing performance, and the like.

  The present invention has been made in view of the above, and it is possible to reduce the cost and easily adjust the frequency characteristics of the acoustic device while maintaining the current processing performance of various system components. For the purpose.

  The frequency characteristic adjustment system according to the embodiment includes a portable terminal that collects sound by a sound collecting unit, and a network connection with the portable terminal, and a measurement sound from a speaker in response to a reproduction request for the measurement sound signal from the portable terminal. An acoustic device that emits a sound of a signal and sets a parameter transmitted from the portable terminal to a frequency characteristic adjusting unit that adjusts a frequency characteristic of an audio signal supplied to the speaker, and a network connection with the portable terminal And receiving audio data obtained by reproducing the measurement audio signal collected by the sound collection unit of the mobile terminal from the mobile terminal, analyzing the frequency characteristics of the audio data, and determining the frequency characteristics of the analyzed audio data as desired. To generate a parameter to be set in the frequency characteristic adjusting unit so that the frequency characteristic of the portable terminal is set. And a processing apparatus for transmitting for.

  A frequency characteristic adjustment method according to an embodiment is a network connection of a portable terminal including a sound collection unit, an audio device including a speaker and a frequency characteristic adjustment unit that adjusts a frequency characteristic of an audio signal supplied to the speaker, and an information processing device. A frequency characteristic adjustment method in the system, wherein the portable terminal requests the acoustic device to reproduce the measurement audio signal, emits the audio of the measurement audio signal from the speaker of the acoustic device, and Sound is collected by the sound collecting unit of the portable terminal, and the sound data reproduced by the sound collecting signal collected by the sound collecting unit of the portable terminal is transmitted from the portable terminal to the information processing apparatus, Analyzing the frequency characteristics of the audio data with an information processing device, and so that the analyzed frequency characteristics of the audio data become the desired frequency characteristics A parameter to be set in the frequency characteristic adjustment unit of the reverberation device is generated, the generated parameter is transmitted from the information processing device to the portable terminal, and the frequency characteristic adjustment unit of the acoustic device is transmitted from the portable terminal to the frequency characteristic adjustment unit. Set the transmitted parameters.

FIG. 1 is a system configuration diagram illustrating an example of a frequency characteristic adjustment system according to an embodiment. FIG. 2 is a plan view showing an example of the appearance of the tablet terminal. FIG. 3 is a block diagram illustrating an example of a hardware configuration of the tablet terminal. FIG. 4 is a block diagram illustrating an example of a hardware configuration of the television display device. FIG. 5 is a module configuration diagram of the server. FIG. 6 is a flowchart showing the flow of the equalizer setting process. FIG. 7 is a front view showing a display example of the analysis result of the recording data of the measurement sound.

  In the embodiment described below, the frequency characteristic adjustment system and the frequency characteristic adjustment method are applied to a system in which a tablet terminal as a mobile terminal, a television display device as an audio device, and a server as an information processing device are connected to a network. An example will be described.

  FIG. 1 is a system configuration diagram illustrating an example of a frequency characteristic adjustment system according to an embodiment. The frequency characteristic adjustment system shown in FIG. 1 includes a television display device 1, a wireless router 3, and a tablet terminal 10 connected via a home or wireless home network 2. The wireless router 3 connects the tablet terminal 10 to the home network 2 by performing wireless communication with the tablet terminal 10. Thereby, communication is enabled between the television display device 1 and the tablet terminal 10.

  Instead of the tablet terminal 10, a mobile communication terminal such as a smartphone or a portable PC may be used as the mobile terminal.

  The tablet terminal 10 is connected to a network 4 such as the Internet using a mobile communication technology such as 3G (third generation) communication or a wireless router 3, and acquires various types of information from the server 100 on the network 4. It has the function to do. The server 100 is provided by, for example, a manufacturer of the television display device 1.

  First, the tablet terminal 10 will be described.

  FIG. 2 is a plan view illustrating an example of the appearance of the tablet terminal 10. The tablet terminal 10 includes a thin box-shaped casing 11 that is held by a user. The tablet terminal 10 includes a display unit 12 that displays information on the front surface (one main surface) side of the housing 11. The display unit 12 includes a touch panel that detects a position on the display screen touched by the user.

  In addition, the tablet terminal 10 includes an operation switch 13 that is positioned on the front side of the housing 11 and below the display unit 12 so that the user can perform various operations. In addition, the tablet terminal 10 includes a speaker 14 that is positioned on the front side of the housing 11 and above the display unit 12 to perform audio output. Furthermore, the tablet terminal 10 includes a camera module 15 for taking an image on the top of the housing 11. The camera module 15 includes a front camera that captures an image on the front side of the housing 11 and a rear camera that captures an image on the back surface (the other main surface) of the housing 11.

  Furthermore, the tablet terminal 10 includes a microphone 30 that is located on the front side of the housing 11 and above the display unit 12 and that collects sound.

  FIG. 3 is a block diagram illustrating an example of a hardware configuration of the tablet terminal 10. As shown in FIG. 3, in addition to the above-described configuration, the tablet terminal 10 includes a CPU (Central Processing Unit) 16, a system controller 17, a graphics controller 18, a touch panel controller 19, a non-volatile memory 20, and a RAM (Random Access Memory). 21, an audio processing unit 22, and a wireless communication module 23.

  The display unit 12 is configured as a so-called touch screen in which the display 12a and the touch panel 12b are combined. The display 12a is, for example, an LCD (Liquid Crystal Display) or an organic EL (Electro Luminescence) display. The touch panel 12b detects a position (touch position) on the display screen of the display 12a touched by a user's finger or a stylus pen.

  The CPU 16 is a processor that comprehensively controls the operation of the tablet terminal 10. The CPU 16 controls each part of the tablet terminal 10 via the system controller 17. The CPU 16 realizes a function for controlling each unit of the tablet terminal 10 by executing, for example, an operation system or various application programs loaded from the nonvolatile memory 20 to the RAM 21. In the present embodiment, in particular, the CPU 16 executes an application program (hereinafter referred to as “acoustic frequency characteristic adjustment application”) for adjusting the acoustic frequency characteristics of the viewing space, thereby realizing processing (see FIG. 6) described later. To do.

  The nonvolatile memory 20 stores an operation system, various application programs, various data necessary for executing the programs, and the like. The RAM 21 provides a work area when the CPU 16 executes a program as a main memory of the tablet terminal 10.

  The system controller 17 includes a memory controller that controls access to the nonvolatile memory 20 and the RAM 21. In addition, the system controller 17 has a function of executing communication with the graphics controller 18, the touch panel controller 19, and the sound processing unit 22. Further, the system controller 17 has a function of inputting user operation information received by the operation switch 13 and image information from the camera module 15. Further, the system controller 17 has a function of acquiring various information from outside the electronic device 10 using the wireless communication module 23.

  The graphics controller 18 is a display controller that controls the display 12 a of the display unit 12. The touch panel controller 19 controls the touch panel 12b, and acquires coordinate data indicating a touch position by the user from the touch panel 12b.

  Under the control of the CPU 16, the voice processing unit 22 performs processing for outputting voice guidance generated by performing voice processing such as voice synthesis from the speaker 14, and performs processing for the voice collected by the microphone 30. .

  The wireless communication module 23 executes wireless communication with the television display device 1 via the wireless router 3 and wireless communication for connection to the network 4 under the control of the CPU 16.

  Next, the television display device 1 will be described.

  As shown in FIG. 1, the television display device 1 includes speakers 50 </ b> A and 50 </ b> B that output sound, and an antenna line 5 connected to the antenna 6 and a cable 7 connected to the home network 2 are connected. ing.

  FIG. 4 is a block diagram illustrating an example of a hardware configuration of the television display device 1. As shown in FIG. 4, the television display device 1 includes a television function unit 51 that receives a television broadcast signal, an HDMI communication unit 52 that is a communication device that receives a digital video signal compliant with the HDMI standard, A LAN (Local Area Network) communication unit 53 that receives IPTV (Internet Protocol Television) transmitted via the network 2, a television function unit 51, an HDMI communication unit 52, and a selector 54 that selects the output of the LAN communication unit 53; A display driving unit 56 that displays video on the display unit 55 based on the video signal output from the selector 54; an equalizer 65 that is a frequency characteristic adjusting unit that adjusts the frequency characteristic of the audio signal output from the selector 54; An audio drive unit that outputs audio to the speakers 50A and 50B based on the audio signal adjusted by the equalizer 65 7, and a control unit 58 which controls each section of the television display device 1.

  The control unit 58 includes a CPU (Central Processing Unit), a RAM (Random Access Memory) that provides a work area for the CPU, and a nonvolatile memory that stores various setting information, programs, and the like. According to the above, various arithmetic processes are executed to control the entire television display device 1.

  The television function unit 51 receives a television broadcast signal by an antenna 6 connected to a TV (Television) input terminal 59 via an antenna line 5 and extracts a signal of a predetermined channel, and a tuner unit 60. And a signal processing unit 61 for receiving the reception signal output from the video signal V1 and restoring the video signal V1 and the audio signal A1.

  The HDMI communication unit 52 separates an HDMI standard digital video signal received from an external device such as a DVD recorder connected to the connector 62 via the HDMI cable 8 into a video component and an audio component. Output as signal A2.

  The LAN communication unit 53 receives IPTV broadcast signals from the home network 2 and the network 4 via the cable 7 connected to the LAN terminal 63, and the video signal V3 and the audio signal A3 decoded from the received signal by a decoder (not shown). Is output.

  The selector 54 includes the video signal V1 and audio signal A1 output from the television function unit 51, the video signal V2 and audio signal A2 output from the HDMI communication unit 52, the video signal V3 and audio output from the LAN communication unit 53. It has a function of selectively switching the signal A3 and outputting it to the display drive unit 56 and the audio drive unit 57.

  The equalizer 65 adjusts the frequency characteristics of the digital audio signal output from the selector 54. Specifically, the equalizer 65 realizes desired sound quality adjustment by enhancing or suppressing a specific frequency band of the input digital audio signal. The equalizer 65 is configured as a parametric equalizer or an FIR (Finite Impulse Response) filter, and can adjust the frequency characteristics of the audio data by adjusting the amplitude level of the audio data in accordance with the set parameters. .

  The audio drive unit 57 converts the digital audio signal adjusted by the equalizer 65 into an analog audio signal that can be reproduced by the speakers 50A and 50B, and then outputs the analog audio signal to the speakers 50A and 50B to reproduce the audio.

  In addition, the television display device 1 includes an operation input unit 64 that receives a remote operation signal from a remote controller (not shown).

  In addition, the television display device 1 includes a measurement audio signal generation unit 66 that generates a measurement audio signal for measuring the acoustic frequency characteristics of the viewing space. The measurement audio signal generated by the measurement audio signal generation unit 66 is, for example, a white noise signal, a pink noise signal, a band noise signal, or a sweep sign signal. Further, the measurement audio signal may be stored in a memory or the like and read out instead of being generated every measurement. The measurement audio signal generated by the measurement audio signal generation unit 66 is input to the equalizer 65 in the same manner as the audio signal output from the selector 54.

  Next, the server 100 will be described.

  The server 100 is a general computer. FIG. 5 is a module configuration diagram of the server 100. As shown in FIG. 5, the server 100 includes a CPU (Central Processing Unit) 101 that performs information processing, a ROM (Read Only Memory) 102 that is a read-only memory that stores BIOS, and a RAM that stores various data in a rewritable manner. (Random Access Memory) 103, which functions as various databases and stores information using an HDD (Hard Disk Drive) 104, which is a storage unit for storing an OS (Operating System) and various application programs, and a storage medium 110, or externally A medium reading device 105 such as a DVD drive for distributing information to or obtaining information from the outside, a communication control device 106 for communicating information with other external devices via the network 4, Display unit 107 such as an LCD (Liquid Crystal Display) for displaying results and the like to the operator, and operation Comprises an input unit 108, which is a pointing device such as a keyboard and mouse for inputting commands and information to the CPU 101, and the bus controller 109 operates by arbitrating data transmitted and received between these units. .

  For example, the server 100 has a program for analyzing the recording data of the measurement sound output from the speakers 50A and 50B of the television display device 1 and designing the equalizer 65 according to the acoustic frequency characteristics as an application program. Installed.

  In general, application programs installed in the HDD 104 of the server 100 are various types of optical disks such as CD-ROMs and DVDs, various magnetic disks such as various magneto-optical disks and flexible disks, and various types of semiconductor memories. The operation program recorded on the storage medium 110 such as a medium and recorded on the storage medium 110 is installed in the HDD 104. Therefore, the portable storage medium 110 such as an optical information recording medium such as a CD-ROM or DVD and a magnetic medium such as an FD can also be a storage medium for storing an application program. Furthermore, the application program may be imported from the outside via the communication control device 106 and installed in the HDD 104, for example.

  In the server 100, when an application program operating on the OS is started, the CPU 101 executes various arithmetic processes according to the application program, and controls each unit intensively.

  In the following, an equalizer setting process, which is a characteristic process of the present embodiment, among various kinds of arithmetic processes executed by the tablet terminal 10, the television display device 1, and the server 100 will be described.

  Here, FIG. 6 is a flowchart showing the flow of an equalizer setting process by cooperation of the tablet terminal 10, the television display device 1, and the server 100. As shown in FIG. 6, the CPU 16 of the tablet terminal 10 makes a request to reproduce the measurement sound via the touch panel 12b in a state where a predetermined GUI (Graphical User Interface) is displayed on the display 12a by starting the acoustic frequency characteristic adjustment application. If it is determined (Yes in step S1), the television display device 1 is requested to reproduce the measurement sound via the wireless communication module 23 (step S2).

  When the control unit (CPU) 58 of the television display device 1 receives the measurement sound reproduction request from the tablet terminal 10 via the LAN communication unit 53 (Yes in step S11), the equalizer 65 is initialized to a parameter with a gain of 0 dB. At the same time (step S12), the measurement audio signal generation unit 66 is controlled to generate a measurement audio signal for measuring the acoustic frequency characteristics of the viewing space (step S13), and the generated measurement audio signal is set to the equalizer 65. Then, the measurement sound is output and reproduced from the speakers 50A and 50B via the audio drive unit 57 (step S14).

  After requesting the measurement sound reproduction, the CPU 16 of the tablet terminal 10 records the measurement sound for a certain period using the microphone 30 (step S3).

  If the CPU 16 of the tablet terminal 10 determines that there is a recording data analysis request by a predetermined GUI operation after a certain period of time has elapsed (Yes in step S4), it requests the server 100 to analyze the recording data via the wireless communication module 23. (Step S5).

  When the CPU 101 of the server 100 receives the recording data analysis request and the recording data from the tablet terminal 10 via the communication control device 106 (Yes in step S21), the recording data is analyzed (step S22). Parameter design is performed (step S23), and the analysis result of the recording data and the parameter design of the equalizer are transmitted to the tablet terminal 10 (step S24).

  The parameter design of the equalizer is such that the frequency characteristic is adjusted by changing the coefficient (parameter) of the filter that realizes the equalizer 65 that is configured as a parametric equalizer, from a characteristic having a peak or a dip to a flat characteristic. It is adjusted so as to obtain a desired frequency characteristic.

  If the analysis result of the recording data and the parameter design of the equalizer are stored in the HDD 104 of the server 100, the data relating to the user viewing environment of the television display device 1 can be stored, and the data can be effectively used for the subsequent development. can do.

  Further, if detailed information (for example, reproduction band: 200 Hz to 15 kHz) related to reproduction of an audio signal for each model of the television display device 1 is stored in the HDD 104 of the server 100, it is obtained from the television display device 1 or In accordance with the model information input by the user, parameters can be generated using the detailed model information stored in the HDD 104 of the server 100. By doing in this way, when the user designates a model that emits bass only up to 200 Hz, it is possible to prevent erroneous correction that generates parameters up to 80 Hz.

  When the CPU 16 of the tablet terminal 10 receives the analysis result of the recording data and the parameter design of the equalizer from the server 100 via the wireless communication module 23 (Yes in Step S6), the CPU 16 of the tablet terminal 10 displays the analysis result of the recording data on the display 12a (Step S6). S7) Waits for an equalizer parameter setting request (step S8).

  FIG. 7 is a front view illustrating a display example of the analysis result of the recording data of the measurement sound emitted from the speakers 50 </ b> A and 50 </ b> B of the television display device 1. As shown in FIG. 7, the frequency characteristics (analysis result of the recording data) of the measurement sound emitted from the speakers 50A and 50B of the television display device 1 and the frequency characteristics in accordance with the equalizer parameter design are combined. Are displayed on the display 12a. By displaying the analysis result of the recording data in this way, the user can visually confirm the effect after setting the equalizer parameter.

  If the CPU 16 of the tablet terminal 10 determines that the equalizer parameter setting is requested by a predetermined GUI operation (Yes in step S8), the CPU 16 requests the television display device 1 to set the equalizer parameter via the wireless communication module 23. (Step S9).

  When the control unit (CPU) 58 of the television display device 1 receives the equalizer parameter setting request from the tablet terminal 10 via the LAN communication unit 53 (Yes in step S15), the parameter of the equalizer 65 is updated (step S16). ).

  Thus, according to this embodiment, the tablet terminal 10 incorporating the microphone 30 owned by the user can be used, and there is no cost increase due to the microphone included in the television display device 1 equipped with the speakers 50A and 50B. Further, in the tablet terminal 10, only UI implementation is required, and complicated processing such as analysis processing of the frequency characteristics of the voice data and parameter generation processing such that the frequency characteristics of the analyzed voice data become the desired frequency characteristics are performed by the server. Therefore, even if the processing performance of the tablet terminal 10 is low, mounting is easy.

  Further, since the tablet terminal 10 as a portable terminal, the television display device 1 as an audio device, and the server 100 as an information processing device are network-connected, there is no need for wiring work, and it is simple and easy. Frequency characteristic adjustment can be performed.

  In the present embodiment, the television display device 1 is applied as an acoustic device. However, the present invention is not limited to this. For example, the television display device 1 may be applied to an acoustic amplifier or the like.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 Sound apparatus 10 Portable terminal 12 Display part 30 Sound collection part 65 Frequency characteristic adjustment part 100 Information processing apparatus

Claims (7)

A mobile terminal that collects sound by the sound collection unit;
Connected to the mobile terminal via a network, and emits the sound of the measurement audio signal from the speaker in response to a reproduction request for the measurement audio signal from the mobile terminal, and adjusts the frequency characteristics of the audio signal supplied to the speaker An acoustic device for setting a parameter transmitted from the mobile terminal to a frequency characteristic adjustment unit;
Audio data obtained by reproducing the measurement audio signal collected from the sound collection unit of the mobile terminal connected to the mobile terminal from the mobile terminal is received from the mobile terminal, the frequency characteristics of the audio data are analyzed, and the analyzed audio An information processing device that generates a parameter to be set in the frequency characteristic adjustment unit so that the frequency characteristic of the data becomes a desired frequency characteristic, and transmits the generated parameter to the mobile terminal;
A frequency characteristic adjustment system comprising: The information processing device transmits the analyzed frequency characteristics of the audio data to the mobile terminal;
The frequency characteristic adjusting system according to claim 1. The mobile terminal displays the frequency characteristics of the audio data and the frequency characteristics after parameter setting by the information processing device on a display unit.
The frequency characteristic adjusting system according to claim 2. The mobile terminal displays on the display unit a reproduction request for the measurement audio signal to the acoustic device and transmission of audio data obtained by reproducing the measurement audio signal collected by the sound collection unit to the information processing device. Executed in response to an operation on the displayed predetermined GUI (Graphical User Interface),
The frequency characteristic adjusting system according to claim 1. The information processing apparatus accumulates the analysis result of the frequency characteristics of the audio data and the generated parameter in a storage unit.
The frequency characteristic adjusting system according to claim 1. The information processing apparatus accumulates detailed information related to reproduction of the audio signal of the acoustic device for each model in the storage unit, and accumulates in the storage unit according to the model information acquired from the acoustic device or input by the user. The parameter is generated using the detailed information of the model in question,
The frequency characteristic adjusting system according to claim 1. A frequency characteristic adjustment method in a system in which a portable terminal including a sound collection unit, a sound device including a speaker and a frequency characteristic adjustment unit for adjusting a frequency characteristic of an audio signal supplied to the speaker, and an information processing apparatus are connected to a network. And
Requesting the acoustic device to reproduce the measurement audio signal from the portable terminal;
The sound of the measurement audio signal is emitted from the speaker of the acoustic device,
Sound is collected by the sound collection unit of the mobile terminal,
Transmitting audio data obtained by reproducing the measurement audio signal collected by the sound collection unit of the mobile terminal from the mobile terminal to the information processing apparatus;
The information processing device analyzes the frequency characteristics of the audio data, and generates a parameter to be set in the frequency characteristic adjustment unit of the acoustic device so that the analyzed frequency characteristics of the audio data become a desired frequency characteristic. ,
Send the generated parameters from the information processing device to the mobile terminal,
Set a parameter transmitted from the mobile terminal to the frequency characteristic adjustment unit of the acoustic device,
Frequency characteristic adjustment method.

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