JPH09281978A - Acoustic measuring system, acoustic correcting system, and remote commander - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable confirming an acoustic characteristic such as a frequency characteristic and the like easily and as an accurate sound field, and to correct the acoustic processing state to an appropriate state. SOLUTION: The remote commander calculates acoustic characteristic about a voice signal collected by an attached microphone, transmits acoustic characteristic data. A receiving/controlling device section performs display in accordance with received acoustic characteristic data. Also, the receiving/controlling device section or the remote commander generates acoustic compensating data in accordance with acoustic characteristic data, thereby, compensating control of acoustic processing operation of an acoustic signal processing section is performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system suitable for measuring acoustic characteristics of acoustic equipment and correcting acoustic characteristics.

[0002]

2. Description of the Related Art For a CD player or other reproducing apparatus, the frequency characteristic of reproduced sound is measured to judge the performance, characteristic, etc. of the apparatus, or to adjust sound processing such as equalizing. There is. In such a case, generally, as the sound field measurement, the sound output from the speaker is collected by the microphone arranged at a predetermined position, and the frequency characteristic measurement of the collected sound signal is performed.

[0003]

However, in such a work, for example, setting the microphone is troublesome and difficult, and it is difficult to set the microphone at a position close to the hearing of the user, that is, near the ear. It is often difficult unless it is a place such as a dedicated measurement room. Further, it is not possible to easily perform, for example, performing equalizing adjustment with reference to the measured frequency characteristic, because it requires a certain degree of specialized knowledge. From these facts, for example, even at the user level, a system that can confirm acoustic characteristics such as frequency characteristics easily and accurately as a sound field, and an acoustic processing state such as equalizing depending on the acoustic characteristics can be easily adjusted appropriately. There was a need for a system that can correct the situation.

[0004]

In view of the above, the present invention has been made in view of the above points, and an acoustic measurement system suitable for measuring acoustic characteristics of acoustic equipment and correction of acoustic processing, an acoustic correction system, and a remote commander used therefor. I will provide a.

The acoustic measurement system comprises a remote commander, a reception / control device section, and a display section. And the remote commander has a microphone,
A characteristic detecting unit that calculates the acoustic characteristic of the audio signal collected by the microphone and a transmitting unit that can transmit the acoustic characteristic data detected by the characteristic detecting unit are provided. Further, the reception / control device unit receives the transmission signal from the remote commander, and when the reception unit receives the acoustic characteristic data, generates display data according to the acoustic characteristic data, and displays the display unit. And a control means for controlling the display operation of. That is, the acoustic characteristics are measured by the remote commander, and the measurement result is displayed on the display unit.

The acoustic correction system comprises a remote commander, a reception / control device section, and an acoustic signal processing section for performing acoustic processing on the output audio signal.
The remote commander is provided with a microphone, a characteristic detecting unit that calculates the acoustic characteristic of the audio signal collected by the microphone, and a transmitting unit that can transmit the acoustic characteristic data detected by the characteristic detecting unit. Further, the reception / control device unit, when receiving acoustic characteristic data by the receiving unit that receives the transmission signal from the remote commander, generates acoustic correction data according to the acoustic characteristic data, and outputs the acoustic signal. And a control means capable of performing correction control of the sound processing operation by supplying to the processing unit. That is, the acoustic characteristic is measured by the remote commander, and the measurement result is sent to the reception / control device unit. The reception / control device unit controls the acoustic processing according to the measurement result.

Another acoustic correction system comprises a remote commander, a reception / control device section, and an acoustic signal processing section for performing acoustic processing on an output audio signal. And the remote commander has a microphone,
Transmitting the correction data generated by the correction data generation means for detecting the acoustic characteristics of the audio signal collected by the microphone and generating the acoustic correction data based on the detected acoustic characteristics A transmission means capable of Further, the receiving / control device unit, receiving means for receiving the transmission signal from the remote commander, and when the receiving means receives the correction data, supplies the correction data to the acoustic signal processing section,
And a control means capable of performing correction control of the sound processing operation. That is, the acoustic characteristic is measured by the remote commander, a command for acoustic processing is generated based on the measurement result, and the command is transmitted to the reception / control device unit. The reception / control device unit controls the acoustic processing according to the command.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described below with reference to FIGS. This example is an acoustic measurement system including a remote commander, a sound reproducing device, and a command receiving device. The sound frequency characteristic output from the sound reproducing device is measured at the user's position and is provided in the command receiving device. It is designed to be displayed on the display unit.

FIG. 1 shows the appearance of the remote commander 1 in the acoustic measurement system of this example, and FIG. 2 is a block diagram of the internal circuit configuration of the remote commander 1. As shown in FIG. 1, the remote commander 1 is provided with a window 2 for transmitting a command signal by infrared rays and various operation keys 3. The remote commander 1 can be used also as a normal remote commander for a sound reproducing device or the like, so that the operation keys 3 are a power on / off key, a numeric key, a volume up / down key, a play key, and a stop key. Various keys such as are prepared. One of them is the measurement key 3a, and when the measurement key 3a is pressed, the measurement operation described later is performed. The jog dial 4 is also provided for various required operations.

These parts are the same as those of a normal remote commander. As shown in FIG. 2, when the operation key 3 is pressed, the key matrix encoding section 12 generates a signal corresponding to the key, and the signal is generated. Are supplied to the control unit 9 including a microcomputer (CPU).
The control unit 9 reads a corresponding command signal from the ROM 11 according to the signal from the key matrix encoding unit 12, modulates the command signal with a predetermined carrier frequency, and supplies the modulated signal to the transmission unit 13.

The transmitter 13 is provided with, for example, a light emitting diode and a switching transistor for controlling the current of the light emitting diode, and a signal obtained by modulating the command signal is applied to the base of the switching transistor, that is, a modulated signal of the command signal. Based on this, the light emitting operation of the light emitting diode is turned on / off. By this operation, the command signal is output as infrared rays from the transmission window 2 and transmitted to the external device.

Further, the remote commander 1 of the present example is shown in FIG.
As shown in FIG. 2, two sound collecting units are formed, and microphones 5L and 5R are provided here.

As shown in FIG. 2, microphones 5L, 5R
The audio signal output from the preamplifier 6L, 6R is amplified and supplied to the bandpass filter / divider unit 7. The bandpass filter / divider unit 7 divides the audio signal into n bands by the n bandpass filters,
The n-system signal output for each band is performed. The signals of the n systems are supplied to the control unit 9 via the amplifiers 8 ₁ to 8 _n , respectively. The control unit 9 is provided with _n A / D input terminals 9 _{1 to} 9 _{n, and} is configured to capture the audio signals of the respective bands, which are the outputs of the amplifiers 8 ₁ to 8 _n , as digital data. There is. The control unit 9 loads the audio signal data of each band, which is sequentially input, into the RAM 10, generates the frequency characteristic measurement data based on the data, and transmits the frequency characteristic measurement data to the transmission unit 1.
3 can be transmitted and output as a command signal.

A command receiving device 2 serving as a portion for receiving a command signal from the remote commander 1 by infrared rays.
0 and the configuration of the sound reproduction device 30 is shown in FIG. The sound reproducing device 30 corresponds to, for example, a reproducing device such as a CD player, and various operation controls of the sound reproducing device 30 are executed by the command receiving device 20. Command receiver 2
0 may actually be integrally provided in the sound reproducing device 30.

The command receiving device 20 is provided with a receiving section 21 for receiving a command code transmitted from the remote commander 1 by infrared rays. The receiving unit 21 converts the infrared command code into an electric signal by a photoelectric conversion element such as a phototransistor and outputs the electric signal. The electric signal is amplified by the amplifier 22 and input to the control unit 23 formed by a microcomputer (CPU).

The control unit 23 performs various controls corresponding to the operation information (command) by the remote commander 1 input from the receiving unit 21. That is, the command code is demodulated to detect the operation content, and the sound reproducing device 3 is accordingly detected.
A control signal is output to 0 to cause the sound reproducing device 30 to execute a necessary operation. Further, although the control unit 23 also functions as a controller of the sound reproduction device 30, the display unit 2 displays the operation status of the sound reproduction device 30 and other necessary displays.
Run with 4. The ROM 24 stores data, programs and the like necessary for reproduction control operation and display control operation. The RAM 25 is also used to store data required for reproduction control operation and display control operation. When the measurement data is input from the remote commander 1 as the command code, the display control operation of the display unit 24 is executed accordingly.

The sound reproducing device 30 is constructed as, for example, a CD player, and the reproducing device portion 31 has a functional portion as a CD player, for example, an optical head mechanism, a spindle mechanism,
A servo mechanism, a decoding circuit, etc. are mounted so that a reproducing operation of a CD (compact disc) can be performed. The reproduced audio signal output from the reproduction device section 31 is supplied to the acoustic processing section 32, and equalized,
Various acoustic processing such as reverb is performed. The audio signal output from the acoustic processing unit 32 is amplified by the power amplifier 33 and output as audio from the speaker 34. The operation of the reproducing device section 31, that is, the reproducing operation, the accessing operation, and the stopping operation of the compact disc are executed under the control of the control section 23. Further, the processing in the sound processing unit 32, that is, the sound processing such as the control of the frequency characteristic and the reverb, is also executed under the control of the control unit 23.

The operation of such an acoustic measurement system will be described with reference to FIGS. 5A shows the processing of the control unit 9 in the remote commander 1, and FIG. 5B shows the processing of the control unit 23 in the command receiving device 20.

When the user loads the compact disc for measurement into the reproducing device section 31 of the sound reproducing device 30 and presses the measurement key 3a on the remote commander 1, the operation of measuring the frequency characteristic of the sound reproducing device 30 is started. . The compact disc for measurement is, for example, a disc on which a sweep signal, a sine wave signal of a predetermined frequency, a single impulse-like signal, white noise, pink noise, etc. are recorded for each track. The sweep signal is, for example, an audio signal that continuously changes from a low frequency to a high frequency. A sine wave signal of a predetermined frequency is 50 Hz, 100 Hz, 50
It refers to a sine wave audio signal having a predetermined frequency such as 0 Hz, 1 KH, 5 KHz, and 10 KHz. The single signal is an audio signal in which pulsed audio is intermittently generated. White noise is a random noise signal whose energy decreases toward higher frequencies, and pink noise is a random noise signal having the same energy in each frequency band.

As the processing of the control section 9, the process proceeds from step F101 to step F102 of FIG. 5A in response to the operation of the measurement key 3a. In step F102, the control unit 9 first outputs a command signal for executing the reproduction operation of a predetermined track on the compact disc. For example, a command that specifies a track number in which a sweep signal is recorded together with a reproduction command is read from the ROM 11 and output from the transmission unit 13 as an infrared signal.

On the other hand, the control section 23 of the command receiving device 20 receives the command signal in response to the command signal transmitted from the remote commander 1. At this time, the processing is performed at step F201 in FIG. 5B. To proceed to F202. That is, for example, a command for reproducing the track in which the sweep signal is recorded is sent to the reproducing device section 31, and the sound reproducing device 30 outputs the sweep sound.

The sweep sound output from the sound reproducing device 30 is the microphone 5 in the remote commander 1.
The signals are taken in by L and 5R, divided by the band pass filter / divider unit 7 for each band signal, and input to the control unit 9. As the processing of step F103, the control unit 9 performs the processing of measuring the frequency characteristics of the audio signals taken in by the microphones 5L and 5R. That is, level detection is performed for each band. The level detection result is used as measurement data, and the measurement data is transmitted in step F104. The measurement data is transmitted as data indicating the level for each band, for example, as shown in FIG.

Upon receiving this measurement data, the control unit 23 on the command receiving device 20 side receives steps F203 to F2.
Proceeding to 04, display data is generated according to the measurement data, and the display of the measurement result is executed on the display unit 24 in step F205. For example, when the measurement data as shown in FIG. 4A is received, the display unit 24 is caused to execute the display as shown in FIG. 4B in order to show the measurement result. By looking at the display unit 24, the user can know the sound field characteristic (frequency characteristic) at his / her position (remote commander 1). That is, the reproduction frequency characteristic of the sound reproducing device 30 can be confirmed as the frequency characteristic that matches the auditory characteristic at the position where the user is.

In step F105, the control unit 9 of the remote commander 1 determines whether or not to perform another measurement process,
If so, the process returns to step F102 to measure the process. For example, if, as the operation program, measurement by sweep sound, measurement by various sine wave signals, measurement by white noise, measurement by a single signal, and the like are set, these are sequentially executed. Then, the measurement results are sequentially displayed on the command receiving device 20 side in accordance with the operation on the remote commander 1 side.

In this example as described above, the user's operation is only a simple operation of pressing the measurement key 3a with the remote commander 1, and the audio output for measurement is executed and detected by each measurement signal. It is possible to know the acoustic characteristics that are obtained as the acoustic characteristics at an appropriate position.
Of course, unlike the conventional measurement, it does not require the troublesome work of connecting a microphone and setting it at the necessary place, and when changing the measurement place, simply changing the position of the remote commander 1 is very convenient. Will be things. Further, even when it is desired to perform measurements at a plurality of positions at the same time, it suffices to prepare a plurality of remote commanders 1 and no complicated work is required.

The measurement data sent from the remote commander 1 to the command receiving device 20 should be stored in the RAM 25 by the control unit 23, and the measurement data should be displayed at a desired timing by the user. By performing the operation, even when various measurements are continuously performed or the measurement is performed at a plurality of points, each measurement result can be slowly confirmed after the measurement. Therefore, actually, as the process of step F204, the storage in the RAM 25 may be executed at the same time.

Next, a second embodiment of the present invention will be described with reference to FIG. This example also shows Remote Commander 1
A sound correction system including the sound reproducing device 30 and the command receiving device 20 is provided, and the sound frequency characteristic output from the sound reproducing device is measured at the user's position in the same manner as in the above example, and is provided in the command receiving device. The sound processing state in the sound reproduction device 30 can be corrected according to the measurement result.

In this case, the configuration of each device is the same as that shown in FIGS. 1 to 3, and description thereof will be omitted. 6A shows the processing of the control unit 9 executed when the user presses the measurement key 3a of the remote commander 1, the processing of FIG. 6A differs from the processing of FIG. 5A. It is the same.

On the other hand, in response to the command transmission for voice reproduction in step F102 in FIG. 6 (a) and the measurement data transmission in step F104, the control unit 23 on the command receiving device 20 side displays the data in FIG. 6 (b). ) Is performed, the process of steps F201 to F205 is the same as the process of FIG. 5B described above. That is, similarly to the above example, the sound reproducing device 3 is responsive to the reproduction command signal from the remote commander 1.
Sound output for measurement is performed from 0, and the sound is collected by the microphones 5L and 5R of the remote commander 1,
The frequency characteristic is measured. Then, the measured frequency characteristic is sent to the command receiving device 20 as measurement data and displayed on the display unit 24.

Here, in the case of the present example, the control section 23 calculates the equalizing correction value based on the supplied measurement data, and performs the equalizing control of the acoustic processing section 32. That is, the ROM 24 or the RAM 25 holds the reference frequency characteristic data for the audio signal to be output by the sound reproducing device 30. The reference frequency characteristic data may be flat characteristics over the entire band, or may be equalizing characteristics set so that the sound quality desired by the user is obtained.

Then, as the processing of step F206, the control section 23 compares the measurement data sent from the remote commander 1 with the reference frequency characteristic data to calculate the equalizing correction value. Then, in step F207, control is performed so that the acoustic processing unit 32 performs equalizing adjustment based on the equalizing correction value.

For example, assume that the level of the entire band is set to 5 dB as the reference frequency characteristic. However, it is assumed that the frequency characteristic measured at the position of the remote commander 1 has a result as shown in FIG. Then
The control unit 23 calculates a correction value of -5 dB for the 50 Hz band, -3 dB for the 100 Hz band, +2 dB for the 500 Hz band, -4 dB for the 1 KHz band, -3 dB for the 5 KHz band, and +3 dB for the 10 KHz band, and the acoustic processing unit 32 accordingly. Equalizing control is performed to correct the band so that each band is measured at 5 dB at the position of the remote commander 1, for example.

This is just an example, but by setting the reference frequency characteristic according to the practical use, the optimum acoustic characteristic can be obtained at the position on the remote commander 1, that is, at the position corresponding to the hearing of the user. Sound processing unit 3
2 will be controlled. Therefore, the user does not need to manually adjust the operation of the sound processing unit 32.

Next, a third embodiment of the present invention will be described with reference to FIG. This example is also the acoustic correction system including the remote commander 1, the sound reproducing device 30, and the command receiving device 20, and the sound frequency characteristic output from the sound reproducing device is measured at the user's position in the same manner as the above example, It can be displayed on the display unit provided in the command receiving device, and the sound reproducing device 3 can be displayed according to the measurement result.
The sound processing state at 0 can be corrected. The configuration of each device is the same as that shown in FIGS.

FIG. 7A shows the processing of the control unit 9 which is executed when the user presses the measurement key 3a of the remote commander 1, but steps F101 to F105 in the processing of FIG. This is similar to the above examples. And Figure 7
In response to the command transmission for voice reproduction in step F102 in (a) and the measurement data transmission in step F104, the control unit 23 on the command receiving device 20 side performs the process of FIG. 6 (b). However, the processing of steps F201 to F205 is the same as the processing of FIG. 5 (b) described above. That is, a sound for measurement is output from the sound reproducing device 30 in response to a reproduction command signal from the remote commander 1, and the sound is collected by the microphones 5L and 5R of the remote commander 1, and the frequency characteristic is measured. Then, the measured frequency characteristic is used as measurement data in the command receiving device 20.
To be displayed on the display unit 24.

In the case of this example, an equalizing correction value for control in the sound processing section 32 is generated on the remote commander 1 side. That is, ROM 11 or R
The AM 10 holds the reference frequency characteristic data of the audio signal to be output by the sound reproducing device 30. Similar to the above example, the reference frequency characteristic data is flat characteristic in the entire band and equalizing characteristic set so that the sound quality desired by the user is obtained.

Then, as the processing of step F106, the control section 9 measures the frequency characteristics of the voices collected by the microphones 5L and 5R and then compares the measurement results with the reference frequency characteristic data to calculate the equalizing correction value. To do. Then, in step F107, the equalizing correction value is transmitted as a command code from the transmitting unit 13 to the command receiving device 20. When the command code as the equalizing correction value is received, the control unit 23 of the command receiving device 20 advances the process from step F208 to F209,
Based on the supplied correction value, the sound processing unit 32 is controlled to perform equalizing adjustment.

As a result, similarly to the second embodiment, the equalizing operation of the sound processing unit 32 is automatically controlled so that the optimum sound characteristic can be obtained at the position corresponding to the hearing of the user. . Therefore, the user does not need to manually adjust the operation of the sound processing unit 32. In this case, it is also easy to operate the remote commander 1 at hand and update, for example, the reference frequency characteristic data, that is, when the user performs the equalizing operation on the remote commander 1,
It is also possible to realize a very effective operation of automatically controlling so that the set frequency characteristic state is obtained at the sound field position.

Although various embodiments have been described above, the system according to the present invention can be widely applied to audio output devices and video / audio output devices other than the CD player. Further, the remote commander 1 and the receiving unit 21 may be of a wireless system using infrared rays, a system of transmitting a command signal by radio waves, or a system of being wired and transmitting a command signal by an electric signal. Further, in the above example, the remote commander 1 is provided with two microphones for stereo sound collection, but monaural sound may be collected with one microphone.

[0040]

As described above, according to the present invention, the remote commander calculates the acoustic characteristic of the voice signal collected by the microphone, transmits the acoustic characteristic data, and the receiving / control device unit receives the acoustic characteristic data. Since the display is performed according to the acoustic characteristic data, there is an effect that the acoustic characteristic at the position of the remote commander, that is, the arbitrary position can be measured very easily and quickly. There is an effect that it is possible to easily perform measurement at a position or simultaneously perform measurement at a plurality of positions.

Further, the reception / control device section or the remote commander generates acoustic correction data according to the acoustic characteristic data, and by performing the correction control of the acoustic processing operation of the acoustic signal processing section by this, the frequency obtained at an arbitrary position. Acoustic processing to obtain the characteristics will be automatically executed,
For example, there is an effect that the work of measuring a characteristic at a user's listening position and adjusting to a desired characteristic at that position, which conventionally requires a very complicated setting, can be performed very easily.

Further, since the remote commander is used, reproduction voice signal output for measurement can be operated at the same time, which is very convenient.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a remote commander according to an embodiment of this invention.

FIG. 2 is a block diagram of a remote commander according to the embodiment.

FIG. 3 is a block diagram of a command receiving device and a sound reproducing device according to the embodiment.

FIG. 4 is an explanatory diagram of measurement data and a display operation according to the embodiment.

FIG. 5 is a flowchart of a measurement operation of the first embodiment.

FIG. 6 is a flowchart of a measurement / correction operation of the second embodiment.

FIG. 7 is a flowchart of measurement / correction operation according to the third embodiment.

[Explanation of symbols]

1 Remote commander, 3a measurement key, 5L, 5R
Microphone, 7 band pass filter / divider,
9,23 Control unit, 10,25 RAM, 11,24
ROM, 13 transmitter, 20 command receiver, 21
Receiving unit, 24 Display unit, 30 Sound reproducing device, 31
Playback device section, 32 sound processing section, 34 speaker

Claims (5)

[Claims] 1. A remote commander, a reception / control device section, and a display section, wherein the remote commander calculates a sound characteristic of a microphone and an audio signal collected by the microphone. When,
The receiving / control device unit includes a receiving unit that receives a transmission signal from the remote commander, and a receiving unit that transmits the acoustic characteristic data detected by the characteristic detecting unit. An acoustic measurement system comprising: a control unit that, when data is received, generates display data according to the acoustic characteristic data and controls a display operation of the display unit. 2. A remote commander, a reception / control device section, and an acoustic signal processing section for performing acoustic processing on an output audio signal, wherein the remote commander is a microphone and an audio signal collected by the microphone. Characteristic detecting means for calculating the acoustic characteristic of
The receiving / control device unit includes a receiving unit that receives a transmission signal from the remote commander, and a receiving unit that transmits the acoustic characteristic data detected by the characteristic detecting unit. When data is received, acoustic correction data corresponding to the acoustic characteristic data is generated and supplied to the acoustic signal processing unit, and a control unit capable of performing correction control of the acoustic processing operation is configured. An acoustic correction system characterized in that 3. A remote commander, a reception / control device section, and an acoustic signal processing section for performing acoustic processing on an output audio signal, wherein the remote commander is a microphone and an audio signal collected by the microphone. And a correction data generating unit that generates acoustic correction data based on the detected acoustic characteristic, and a transmitting unit that can transmit the correction data generated by the correction data generating unit. The reception / control device unit receives a transmission signal from the remote commander, and when correction data is received by the reception unit, supplies the correction data to the acoustic signal processing unit, A sound correction comprising a control means capable of performing correction control of processing operation. Stem. 4. A microphone, a characteristic detecting means for calculating an acoustic characteristic of an audio signal collected by the microphone, and a transmitting means capable of transmitting the acoustic characteristic data detected by the characteristic detecting means. A remote commander characterized by being configured as. 5. A microphone, correction data generation means for detecting acoustic characteristics of a voice signal collected by the microphone and generating acoustic correction data based on the detected acoustic characteristics, and the correction data generation means. A remote commander characterized by comprising a transmitting means capable of transmitting the correction data generated in (1).