WO2018167941A1 - Audio signal processing device, audio signal processing method, and program - Google Patents

Audio signal processing device, audio signal processing method, and program Download PDF

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Publication number
WO2018167941A1
WO2018167941A1 PCT/JP2017/010857 JP2017010857W WO2018167941A1 WO 2018167941 A1 WO2018167941 A1 WO 2018167941A1 JP 2017010857 W JP2017010857 W JP 2017010857W WO 2018167941 A1 WO2018167941 A1 WO 2018167941A1
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correction
signal processing
loudness
audio signal
speaker
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PCT/JP2017/010857
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French (fr)
Japanese (ja)
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川合　洋成
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ヤマハ株式会社
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Priority to PCT/JP2017/010857 priority Critical patent/WO2018167941A1/en
Publication of WO2018167941A1 publication Critical patent/WO2018167941A1/en

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G9/00—Combinations of two or more types of control, e.g. gain control and tone control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response

Definitions

  • One embodiment of the present invention relates to an audio signal processing apparatus, an audio signal processing method, and a program for performing various processes on an audio signal.
  • Human auditory sensitivity varies with frequency. For example, when the volume is low, it is difficult to hear a low frequency component and a high frequency component. Such a characteristic is defined as an equal loudness curve in ISO 226: 2003.
  • a conventional audio signal processing apparatus performs frequency characteristic correction (loudness correction) in accordance with an equal loudness curve by performing processing for increasing the level of a low-frequency component and a high-frequency component (for example, patent document). 1).
  • the audio signal processing device of Patent Document 2 describes a configuration that performs loudness correction in consideration of the distance to the listening position, the efficiency of the speaker, and the like.
  • JP 2013-143663 A Japanese Patent Laid-Open No. 2015-179991
  • the loudness correction in Patent Document 2 is a loudness correction that takes into account the efficiency of the speaker in accordance with the master volume, but it cannot perform a free correction reflecting the user's intention.
  • audio signal processing that can perform free correction that reflects the user's own intention but can also perform loudness correction in consideration of the efficiency of the speaker in accordance with the master volume.
  • the audio signal processing device includes a volume setting reception unit, a speaker characteristic acquisition unit, a loudness correction reception unit, and a signal processing unit.
  • the volume setting reception unit receives a volume setting value.
  • the speaker characteristic acquisition unit acquires the characteristic of the speaker.
  • the loudness correction acceptance unit accepts a loudness correction value.
  • the signal processing unit includes: a first correction mode for performing loudness correction according to the loudness correction value received by the loudness correction receiving unit; and a characteristic of the speaker when the speaker characteristic acquisition unit acquires the characteristic of the speaker. And a second correction mode in which loudness correction is performed in accordance with a change in the volume setting value.
  • loudness correction considering the efficiency of the speaker can also be performed according to the master volume.
  • FIG. 1 is a front external view of the audio signal processing apparatus.
  • FIG. 2 is a block diagram showing a hardware configuration of the audio signal processing apparatus.
  • the audio signal processing apparatus 1 is, for example, a Hi-Fi (High-Fidelity) audio receiver. In FIG. 1, only main components are shown, and other components are omitted.
  • the audio signal processing apparatus 1 includes a display 11, a master volume 12, and a loudness volume 17 on the front surface.
  • the audio signal processing apparatus 1 includes a display unit 11, a master volume 12, a CPU 13, a ROM 14, a RAM 15, an input interface (I / F) 16, a loudness volume 17, a DSP 18, as a hardware configuration.
  • An amplifier (AMP) 19 and an output I / F 20 are provided.
  • Display 11 master volume 12, CPU 13, ROM 14, RAM 15, input interface (I / F) 16, loudness volume 17, DSP 18, amplifier (AMP) 19, and output I / F 20 are connected to bus 25.
  • the display 11 is made of, for example, an LED or an LCD.
  • the display 11 is an LED for indicating that a second correction mode (automatic correction mode linked to the master volume) described later is being executed.
  • the upper part of the display 11 is marked with “AUTO VOL.” To indicate that the second correction mode is being executed.
  • CPU13 reads the program memorize
  • the CPU 13 functions as a control unit that comprehensively controls the operation of the audio signal processing apparatus 1.
  • FIG. 3 is a diagram showing a functional configuration of the audio signal processing apparatus 1.
  • the number of channels of the digital audio signal input to the input I / F 16 may be monaural, stereo, or a mode in which a larger number of channels (for example, 7.1 channels) are input. May be.
  • the input I / F 16 includes various input mechanisms such as an analog audio signal input terminal, a digital audio signal input terminal, a LAN terminal, HDMI (registered trademark), or a wireless LAN interface.
  • the input I / F 16 may have a built-in ADC function for converting an analog audio signal into a digital audio signal.
  • the input I / F 16 inputs a digital audio signal to the DSP 18.
  • the DSP 18 functionally includes a signal processing unit 181 and a level adjustment unit 182.
  • the signal processing unit 181 performs various signal processing on the input digital audio signal in accordance with instructions from the CPU 13.
  • the signal processing unit 181 outputs the digital audio signal after the signal processing to the level adjustment unit 182.
  • the level adjustment unit 182 performs level adjustment according to the volume setting value of the master volume 12 in accordance with an instruction from the CPU 13.
  • the level adjustment unit 182 outputs the digital audio signal after the level adjustment to the amplifier 19.
  • the amplifier 19 converts the digital audio signal into an analog audio signal and amplifies the analog audio signal.
  • the amplifier 19 outputs the amplified analog audio signal to the output I / F 20.
  • the CPU 13 changes the level adjustment amount of the level adjustment unit 182 in accordance with the volume setting value of the master volume 12, but the CPU 13 does the amplifier 19 in accordance with the volume setting value of the master volume 12.
  • the amplification factor may be changed.
  • the output I / F 20 includes a speaker cable connection terminal.
  • the output I / F 20 outputs the input analog audio signal to an external speaker.
  • the output I / F 20 has connection terminals of a plurality of systems (for example, A system and B system). Each system further includes a plurality of connection terminals (for example, an L channel terminal and an R channel terminal).
  • the output I / F 20 outputs an analog audio signal from a connection terminal of either the A system or the B system in accordance with an instruction from the CPU 13.
  • the speaker 100L and the speaker 100R are connected to the A system
  • the speaker 101L and the speaker 101R are connected to the B system.
  • the user uses a user I / F (not shown) such as a remote control to emit sound from the speakers of the A system or B system, emit sound from the speakers of both systems, or not emit sound from all speakers, etc. Can be instructed.
  • the signal processing unit 181 performs loudness correction according to the loudness correction value received by the loudness volume 17 in accordance with an instruction from the CPU 13 (performs the first correction mode).
  • FIG. 4 is a diagram showing the relationship between the loudness volume and the loudness correction.
  • the horizontal axis of the graph in the figure corresponds to the frequency, and the vertical axis corresponds to the loudness correction value (gain of the loudness volume 17).
  • the loudness correction value of the loudness volume 17 is 0 dB
  • the signal processing unit 181 reduces the gain of the middle frequency component as the gain of the loudness correction value of the loudness volume 17 decreases, and corrects the level difference between the low frequency component and the high frequency component. .
  • Such loudness correction is performed in order to realize a frequency characteristic in accordance with, for example, an equal loudness curve defined in ISO 226: 2003.
  • the signal processing unit 181 performs loudness correction so that the level difference between the mid-frequency component, the low-frequency component, and the high-frequency component increases as the loudness correction value decreases in accordance with the equal loudness curve. This prevents the high frequency component and the low frequency component from becoming difficult to hear (the mid frequency component is emphasized).
  • the user can adjust the volume with the master volume 12 and operate the loudness volume 17 to adjust the sound quality to a desired level.
  • the signal processing unit 181 may automatically perform loudness correction (perform the second correction mode) in accordance with the change in the volume setting value received by the master volume 12 in accordance with an instruction from the CPU 13.
  • the CPU 13 acquires speaker characteristics (speaker characteristics) using the measurement sound, the CPU 13 instructs the signal processing unit 181 to perform the second correction mode.
  • a microphone 150 is connected to the input I / F 16.
  • the microphone 150 is installed at the listening position.
  • the CPU 13 acquires speaker characteristics using the measurement sound and the microphone 150 (in this case, the CPU 13 functions as a speaker characteristic acquisition unit). For example, when the user installs the microphone 150 at the listening position and instructs the start of measurement using a user I / F such as a remote controller (not shown), the CPU 13 performs the operation shown in FIG.
  • FIG. 5 is a flowchart showing the operation of the speaker characteristic acquisition and correction processing.
  • CPU13 produces
  • the measurement sound is, for example, a sine wave, white noise, pink noise, or the like.
  • the CPU 13 measures the signal level of the sound acquired by the microphone 150 and the time difference from when the measurement sound is output until the sound related to the measurement sound is detected by the microphone 150, and the volume at the listening position and the speaker And the distance from the listening position are measured (s12).
  • the CPU 13 confirms whether or not the measurement has been performed for all the speakers (s13). If the measurement has not been completed for all the speakers, the CPU 13 is changed and the process is repeated from the output of the measurement sound (s15). ).
  • the CPU 13 correct
  • the signal processing unit 181 performs the second correction mode when the speaker characteristics are acquired as described above.
  • FIG. 6 is a flowchart showing the switching operation between the first correction mode and the second correction mode.
  • the CPU 13 is optional when the audio signal processing device 1 is activated, when an audio signal is input, when an audio signal is output, or when the user is instructed to start loudness correction via a remote controller or the like.
  • the operation shown in FIG. 6 is started at the timing. First, the CPU 13 determines whether there is a measurement result of speaker characteristics (s21).
  • the CPU 13 determines that there is no measurement result of the speaker characteristic
  • the CPU 13 causes the signal processing unit 181 to execute the first correction mode (s22). Further, the CPU 13 turns off the display 11 (s23). Thereby, the user can determine that the current state is the manual correction mode (first correction mode). In this case, the user can adjust the sound volume with the master volume 12 and operate the loudness volume 17 to adjust the sound quality to his or her preference.
  • the CPU 13 determines that there is a measurement result of the speaker characteristic, the CPU 13 causes the signal processing unit 181 to execute the second correction mode (s24). Further, the CPU 13 lights up the display 11 (s25). Thereby, the user can determine that the current state is the automatic correction mode (second correction mode).
  • the second correction mode is a mode for performing loudness correction in accordance with the speaker characteristics and the volume setting value of the master volume 12.
  • the signal processing unit 181 makes the frequency characteristic flat with reference to the time when the volume setting value of the master volume 12 is 0 dB.
  • the signal processing unit 181 corrects the frequency characteristics according to the equal loudness curve shown in FIG. Ensure that the characteristics are realized. Then, the signal processing unit 181 performs loudness correction in consideration of speaker characteristics.
  • the volume setting value of the master volume 12 is 0 dB and a volume of 80 phon should be output, but the listening position is affected by the efficiency of the speaker and the distance between the speaker and the listening position.
  • the signal processing unit 181 corrects the frequency characteristic when the loudness correction value of the loudness volume 17 in FIG. 4 is ⁇ 5 dB.
  • the signal processing unit 181 4 is corrected to the frequency characteristic when the loudness correction value of the loudness volume 17 is ⁇ 30 dB.
  • the signal processing unit 181 performs loudness correction of the characteristic according to the lower sound volume setting value.
  • the signal processing unit 181 does not change the frequency characteristics even if the user operates the loudness volume 17.
  • the audio signal processing apparatus 1 may shift to the first correction mode when the user operates the loudness volume 17 during the execution of the second correction mode.
  • FIG. 7 is a flowchart showing the operation in the second correction mode.
  • the CPU 13 determines whether or not the loudness volume 17 has been operated in the second correction mode (s31). When the loudness volume 17 is operated, the CPU 13 causes the signal processing unit 181 to execute the first correction mode (s32). Further, the CPU 13 turns off the display 11 (s33).
  • the audio signal processing apparatus 1 normally performs automatic correction according to the master volume 12, but when the loudness volume 17 is operated and the user determines that correction is to be performed manually, the audio signal processing apparatus 1 automatically performs manual correction. The mode can be shifted to the correction mode.
  • the loudness volume 17 is a user I / F for receiving an instruction to perform either the first correction mode or the second correction mode.
  • the audio signal processing apparatus 1 may include a dedicated user I / F (for example, a changeover switch or the like) that receives an instruction to perform either the first correction mode or the second correction mode.
  • the audio signal processing apparatus 1 may automatically return to the second correction mode when the second correction mode is shifted to the first correction mode and further when a predetermined condition is satisfied. For example, after shifting from the second correction mode to the first correction mode, it may be automatically returned to the second correction mode after a predetermined time has elapsed. The audio signal processing apparatus 1 may return to the second correction mode when an operation as shown in FIG. 8 or FIG. 9 is performed by the user.
  • FIG. 8 is a flowchart showing a mode of shifting from the first correction mode to the second correction mode when the loudness correction value of the loudness volume 17 is returned to the default value (0 dB).
  • the CPU 13 determines whether or not the loudness volume 17 has been operated and the loudness correction value has been returned to the default value (0 dB) (s41). When determining that the loudness correction value has been returned to the default value (0 dB), the CPU 13 causes the signal processing unit 181 to execute the second correction mode (s42). Further, the CPU 13 lights up the display 11 (s43).
  • the audio signal processing apparatus 1 can also shift to automatic correction when it is determined that the user intends to stop manual correction.
  • FIG. 9 is a flowchart showing a mode of shifting from the first correction mode to the second correction mode when the output destination of the speaker is switched.
  • the CPU 13 determines whether or not the output destination of the speaker has been switched in the first correction mode (s51).
  • the output I / F 20 has connection terminals of a plurality of systems (for example, A system and B system).
  • the user uses a user I / F (not shown) such as a remote controller to emit sound from the A or B system speakers, to emit sound from both speakers, or not to emit sound from all speakers, etc. Can be instructed.
  • the CPU 13 determines whether or not there is a measurement result of the characteristics of the speaker used after the switching (s52).
  • the CPU 13 determines that there is no measurement result of speaker characteristics, the CPU 13 maintains the first correction mode. On the other hand, when determining that there is a measurement result of the speaker characteristic, the CPU 13 causes the signal processing unit 181 to execute the second correction mode (s53). Further, the CPU 13 lights up the display 11 (s54).
  • the audio signal processing apparatus 1 can first shift to the automatic correction mode and provide the user with an optimum loudness correction environment.

Abstract

This audio signal processing device is provided with a sound volume setting reception unit, loudspeaker characteristic acquisition unit, loudness correction reception unit, and signal processing unit. The sound volume setting reception unit receives a sound volume setting value. The loudspeaker characteristic acquisition unit acquires loudspeaker characteristics. The loudness correction reception unit receives a loudness correction value. The signal processing unit operates in either first correction mode, in which loudness correction is to be performed corresponding to the loudness correction value received by the loudness correction reception unit, or second correction mode, in which the loudness correction is to be performed corresponding to the loudspeaker characteristics and a change of the sound volume setting value in the cases where the loudspeaker characteristic acquisition unit has acquired the loudspeaker characteristics.

Description

オーディオ信号処理装置、オーディオ信号処理方法、およびプログラムAudio signal processing apparatus, audio signal processing method, and program
　この発明の一実施形態は、オーディオ信号に種々の処理を行うオーディオ信号処理装置、オーディオ信号処理方法、およびプログラムに関する。 One embodiment of the present invention relates to an audio signal processing apparatus, an audio signal processing method, and a program for performing various processes on an audio signal.
　人の聴覚は、周波数によって感度が異なる。例えば、音量が小さい場合には低域成分および高域成分が聞こえにくくなる。このような特性は、ＩＳＯ２２６：２００３において等ラウドネス曲線として規定されている。 ∙ Human auditory sensitivity varies with frequency. For example, when the volume is low, it is difficult to hear a low frequency component and a high frequency component. Such a characteristic is defined as an equal loudness curve in ISO 226: 2003.
　そこで、従来のオーディオ信号処理装置は、低域成分および高域成分のレベルを高くする処理を行うことで、等ラウドネス曲線に合わせた周波数特性の補正（ラウドネス補正）を行っている（例えば特許文献１を参照）。 Therefore, a conventional audio signal processing apparatus performs frequency characteristic correction (loudness correction) in accordance with an equal loudness curve by performing processing for increasing the level of a low-frequency component and a high-frequency component (for example, patent document). 1).
　また、特許文献２のオーディオ信号処理装置は、聴取位置との距離、またはスピーカの能率等を考慮して、ラウドネス補正を行う構成が記載されている。 Also, the audio signal processing device of Patent Document 2 describes a configuration that performs loudness correction in consideration of the distance to the listening position, the efficiency of the speaker, and the like.
特開２０１３－１４３７６３号公報JP 2013-143663 A 特開２０１５－１７９９９１号公報Japanese Patent Laid-Open No. 2015-179991
　特許文献１のラウドネス補正では、スピーカの能率を考慮した補正がなされていない。 In the loudness correction of Patent Document 1, the correction considering the efficiency of the speaker is not made.
　特許文献２のラウドネス補正は、マスタボリュームに応じて、スピーカの能率を考慮したラウドネス補正であるが、ユーザの意図を反映した自由な補正を行うことができない。 The loudness correction in Patent Document 2 is a loudness correction that takes into account the efficiency of the speaker in accordance with the master volume, but it cannot perform a free correction reflecting the user's intention.
　そこで、本発明の一実施形態は、ユーザ自身の意図を反映した自由な補正を行うことが可能でありながら、マスタボリュームに応じてスピーカの能率を考慮したラウドネス補正も行なうこともできるオーディオ信号処理装置、オーディオ信号処理方法、およびプログラムを提供することを目的とする。 Therefore, according to an embodiment of the present invention, audio signal processing that can perform free correction that reflects the user's own intention but can also perform loudness correction in consideration of the efficiency of the speaker in accordance with the master volume. An object is to provide an apparatus, an audio signal processing method, and a program.
　オーディオ信号処理装置は、音量設定受付部と、スピーカ特性取得部と、ラウドネス補正受付部と、信号処理部と、を備えている。音量設定受付部は、音量設定値を受け付ける。スピーカ特性取得部は、スピーカの特性を取得する。ラウドネス補正受付部は、ラウドネス補正値を受け付ける。信号処理部は、前記ラウドネス補正受付部で受け付けた前記ラウドネス補正値に応じてラウドネス補正を行う第１補正モードと、前記スピーカ特性取得部が前記スピーカの特性を取得した場合に、該スピーカの特性および前記音量設定値の変化に応じてラウドネス補正を行なう第２補正モードと、のいずれかを行なう。 The audio signal processing device includes a volume setting reception unit, a speaker characteristic acquisition unit, a loudness correction reception unit, and a signal processing unit. The volume setting reception unit receives a volume setting value. The speaker characteristic acquisition unit acquires the characteristic of the speaker. The loudness correction acceptance unit accepts a loudness correction value. The signal processing unit includes: a first correction mode for performing loudness correction according to the loudness correction value received by the loudness correction receiving unit; and a characteristic of the speaker when the speaker characteristic acquisition unit acquires the characteristic of the speaker. And a second correction mode in which loudness correction is performed in accordance with a change in the volume setting value.
　この発明によれば、ユーザ自身の意図を反映した自由な補正を行うことが可能でありながら、マスタボリュームに応じてスピーカの能率を考慮したラウドネス補正も行なうこともできる。 According to the present invention, while it is possible to perform free correction reflecting the user's own intention, loudness correction considering the efficiency of the speaker can also be performed according to the master volume.
オーディオ信号処理装置の前面外観図である。It is a front external view of an audio signal processing device. オーディオ信号処理装置のハードウェア構成を示すブロック図である。It is a block diagram which shows the hardware constitutions of an audio signal processing apparatus. マスタボリュームの音量設定値とラウドネス補正の関係を示す図である。It is a figure which shows the relationship between the volume setting value of a master volume, and a loudness correction. ラウドネスボリュームとラウドネス補正の関係を示す図である。It is a figure which shows the relationship between a loudness volume and a loudness correction | amendment. スピーカ特性の取得および補正の動作を示すフローチャートである。It is a flowchart which shows operation | movement of acquisition and correction | amendment of a speaker characteristic. 第１補正モードと第２補正モードとの切り替え動作を示すフローチャートである。It is a flowchart which shows switching operation | movement between 1st correction mode and 2nd correction mode. 第２補正モードにおけるＣＰＵの動作を示すフローチャートである。It is a flowchart which shows operation | movement of CPU in 2nd correction mode. 第１補正モードにおけるＣＰＵの動作を示すフローチャートである。It is a flowchart which shows operation | movement of CPU in 1st correction mode. 第１補正モードにおけるＣＰＵの動作を示すフローチャートである。It is a flowchart which shows operation | movement of CPU in 1st correction mode.
　図１は、オーディオ信号処理装置の前面外観図である。図２は、オーディオ信号処理装置のハードウェア構成を示すブロック図である。オーディオ信号処理装置１は、例えばＨｉ－Ｆｉ（High Fidelity）オーディオレシーバである。図１においては、主要な構成のみ図示して、他の構成は省略している。 FIG. 1 is a front external view of the audio signal processing apparatus. FIG. 2 is a block diagram showing a hardware configuration of the audio signal processing apparatus. The audio signal processing apparatus 1 is, for example, a Hi-Fi (High-Fidelity) audio receiver. In FIG. 1, only main components are shown, and other components are omitted.
　オーディオ信号処理装置１は、図１に示すように、前面に、表示器１１、マスタボリューム１２、およびラウドネスボリューム１７を備えている。また、オーディオ信号処理装置１は、図２に示すように、ハードウェア構成として、表示器１１、マスタボリューム１２、ＣＰＵ１３、ＲＯＭ１４、ＲＡＭ１５、入力インタフェース（Ｉ／Ｆ）１６、ラウドネスボリューム１７、ＤＳＰ１８、アンプ（ＡＭＰ）１９、および出力Ｉ／Ｆ２０を備えている。 As shown in FIG. 1, the audio signal processing apparatus 1 includes a display 11, a master volume 12, and a loudness volume 17 on the front surface. As shown in FIG. 2, the audio signal processing apparatus 1 includes a display unit 11, a master volume 12, a CPU 13, a ROM 14, a RAM 15, an input interface (I / F) 16, a loudness volume 17, a DSP 18, as a hardware configuration. An amplifier (AMP) 19 and an output I / F 20 are provided.
　表示器１１、マスタボリューム１２、ＣＰＵ１３、ＲＯＭ１４、ＲＡＭ１５、入力インタフェース（Ｉ／Ｆ）１６、ラウドネスボリューム１７、ＤＳＰ１８、アンプ（ＡＭＰ）１９、および出力Ｉ／Ｆ２０は、バス２５に接続されている。 Display 11, master volume 12, CPU 13, ROM 14, RAM 15, input interface (I / F) 16, loudness volume 17, DSP 18, amplifier (AMP) 19, and output I / F 20 are connected to bus 25.
　表示器１１は、例えばＬＥＤまたはＬＣＤ等からなる。この例では、表示器１１は、後述の第２補正モード（マスタボリュームに連動した自動補正モード）を実行中であることを示すためのＬＥＤである。図１に示すオーディオ信号処理装置１の前面において、表示器１１の上部には、第２補正モードを実行中であることを示すために「ＡＵＴＯ　ＶＯＬ．」の文字表記がなされている。 The display 11 is made of, for example, an LED or an LCD. In this example, the display 11 is an LED for indicating that a second correction mode (automatic correction mode linked to the master volume) described later is being executed. On the front surface of the audio signal processing device 1 shown in FIG. 1, the upper part of the display 11 is marked with “AUTO VOL.” To indicate that the second correction mode is being executed.
　ＣＰＵ１３は、記憶媒体であるＲＯＭ１４に記憶されているプログラムをＲＡＭ１５に読み出して、所定の機能を実現する。例えば、ＣＰＵ１３は、オーディオ信号処理装置１の動作を統括的に制御する制御部として機能する。 CPU13 reads the program memorize | stored in ROM14 which is a storage medium to RAM15, and implement | achieves a predetermined function. For example, the CPU 13 functions as a control unit that comprehensively controls the operation of the audio signal processing apparatus 1.
　図３は、オーディオ信号処理装置１の機能的構成を示す図である。図３においては、説明を簡略化するために代表して１チャンネルの信号処理系統だけを示す。入力Ｉ／Ｆ１６に入力されるデジタルオーディオ信号のチャンネル数は、モノラルであってもよいし、ステレオであってもよいし、さらに多数のチャンネル（例えば７．１チャンネル）が入力される態様であってもよい。 FIG. 3 is a diagram showing a functional configuration of the audio signal processing apparatus 1. In FIG. 3, only one channel signal processing system is shown as a representative for the sake of simplicity. The number of channels of the digital audio signal input to the input I / F 16 may be monaural, stereo, or a mode in which a larger number of channels (for example, 7.1 channels) are input. May be.
　入力Ｉ／Ｆ１６は、アナログオーディオ信号入力端子、デジタルオーディオ信号入力端子、ＬＡＮ端子、ＨＤＭＩ（登録商標）、または無線ＬＡＮインタフェース等の各種の入力機構を備える。入力Ｉ／Ｆ１６は、アナログオーディオ信号が入力された場合にデジタルオーディオ信号に変換するＡＤＣの機能を内蔵していてもよい。 The input I / F 16 includes various input mechanisms such as an analog audio signal input terminal, a digital audio signal input terminal, a LAN terminal, HDMI (registered trademark), or a wireless LAN interface. The input I / F 16 may have a built-in ADC function for converting an analog audio signal into a digital audio signal.
　入力Ｉ／Ｆ１６は、デジタルオーディオ信号をＤＳＰ１８に入力する。ＤＳＰ１８は、機能的に、信号処理部１８１およびレベル調整部１８２を備える。 The input I / F 16 inputs a digital audio signal to the DSP 18. The DSP 18 functionally includes a signal processing unit 181 and a level adjustment unit 182.
　信号処理部１８１は、ＣＰＵ１３の指示に従って、入力されたデジタルオーディオ信号に種々の信号処理を施す。信号処理部１８１は、信号処理を施した後のデジタルオーディオ信号を、レベル調整部１８２に出力する。 The signal processing unit 181 performs various signal processing on the input digital audio signal in accordance with instructions from the CPU 13. The signal processing unit 181 outputs the digital audio signal after the signal processing to the level adjustment unit 182.
　レベル調整部１８２は、ＣＰＵ１３の指示に従って、マスタボリューム１２の音量設定値に応じてレベル調整を行う。レベル調整部１８２は、レベル調整を行なった後のデジタルオーディオ信号をアンプ１９に出力する。 The level adjustment unit 182 performs level adjustment according to the volume setting value of the master volume 12 in accordance with an instruction from the CPU 13. The level adjustment unit 182 outputs the digital audio signal after the level adjustment to the amplifier 19.
　アンプ１９は、デジタルオーディオ信号をアナログオーディオ信号に変換し、該アナログオーディオ信号を増幅する。アンプ１９は、増幅したアナログオーディオ信号を、出力Ｉ／Ｆ２０に出力する。なお、この実施形態では、ＣＰＵ１３がマスタボリューム１２の音量設定値に応じてレベル調整部１８２のレベル調整量を変更する態様であるが、ＣＰＵ１３は、マスタボリューム１２の音量設定値に応じてアンプ１９の増幅率を変更してもよい。 The amplifier 19 converts the digital audio signal into an analog audio signal and amplifies the analog audio signal. The amplifier 19 outputs the amplified analog audio signal to the output I / F 20. In this embodiment, the CPU 13 changes the level adjustment amount of the level adjustment unit 182 in accordance with the volume setting value of the master volume 12, but the CPU 13 does the amplifier 19 in accordance with the volume setting value of the master volume 12. The amplification factor may be changed.
　出力Ｉ／Ｆ２０は、スピーカケーブルの接続端子を備える。出力Ｉ／Ｆ２０は、入力されたアナログオーディオ信号を外部のスピーカに出力する。出力Ｉ／Ｆ２０は、複数系統（例えばＡ系統およびＢ系統）の接続端子を有する。各系統には、それぞれさらに複数の接続端子（例えばＬチャンネル端子およびＲチャンネル端子）がある。出力Ｉ／Ｆ２０は、ＣＰＵ１３の指示に従って、Ａ系統またはＢ系統のいずれかの接続端子から、アナログオーディオ信号を出力する。例えば、Ａ系統には、スピーカ１００Ｌおよびスピーカ１００Ｒが接続され、Ｂ系統には、スピーカ１０１Ｌおよびスピーカ１０１Ｒが接続される。ユーザは、リモコン等のユーザＩ／Ｆ（不図示）を用いて、Ａ系統またはＢ系統のスピーカから放音させる、両系統のスピーカから放音させる、あるいは、すべてのスピーカから放音させない、等を指示することができる。 The output I / F 20 includes a speaker cable connection terminal. The output I / F 20 outputs the input analog audio signal to an external speaker. The output I / F 20 has connection terminals of a plurality of systems (for example, A system and B system). Each system further includes a plurality of connection terminals (for example, an L channel terminal and an R channel terminal). The output I / F 20 outputs an analog audio signal from a connection terminal of either the A system or the B system in accordance with an instruction from the CPU 13. For example, the speaker 100L and the speaker 100R are connected to the A system, and the speaker 101L and the speaker 101R are connected to the B system. The user uses a user I / F (not shown) such as a remote control to emit sound from the speakers of the A system or B system, emit sound from the speakers of both systems, or not emit sound from all speakers, etc. Can be instructed.
　信号処理部１８１は、ＣＰＵ１３の指示に従って、ラウドネスボリューム１７で受け付けたラウドネス補正値に応じて、ラウドネス補正を行う（第１補正モードを行なう）。 The signal processing unit 181 performs loudness correction according to the loudness correction value received by the loudness volume 17 in accordance with an instruction from the CPU 13 (performs the first correction mode).
　図４は、ラウドネスボリュームとラウドネス補正の関係を示す図である。同図のグラフの横軸は周波数に対応し、縦軸はラウドネス補正値（ラウドネスボリューム１７のゲイン）に対応する。例えば、ラウドネスボリューム１７のラウドネス補正値が０ｄＢである場合、周波数特性は、フラットである。これに対し、信号処理部１８１は、ラウドネスボリューム１７のラウドネス補正値のゲインが低下するほど、中域成分のゲインを低下させ、低域成分および高域成分とのレベル差が生じるように補正する。このようなラウドネス補正は、例えばＩＳＯ２２６：２００３において規定された等ラウドネス曲線に合わせた周波数特性を実現するために行う。人の聴感は、音量が小さい場合に、高域成分および低域成分が聞こえにくくなる。そのため、ユーザは、マスタボリューム１２の音量設定値を低下させた場合、中域成分だけが強調された音質として聞こえる場合がある。そこで、信号処理部１８１は、上記、等ラウドネス曲線に合わせて、ラウドネス補正値が低下するほど中域成分と、低域成分および高域成分と、のレベル差が大きくなるようなラウドネス補正を行い、高域成分および低域成分が聞こえにくくなる（中域成分が強調される）ことを防止する。ユーザは、第１補正モードにおいては、マスタボリューム１２で音量を調整し、かつラウドネスボリューム１７を操作して好みの音質に調整することができる。 FIG. 4 is a diagram showing the relationship between the loudness volume and the loudness correction. The horizontal axis of the graph in the figure corresponds to the frequency, and the vertical axis corresponds to the loudness correction value (gain of the loudness volume 17). For example, when the loudness correction value of the loudness volume 17 is 0 dB, the frequency characteristic is flat. On the other hand, the signal processing unit 181 reduces the gain of the middle frequency component as the gain of the loudness correction value of the loudness volume 17 decreases, and corrects the level difference between the low frequency component and the high frequency component. . Such loudness correction is performed in order to realize a frequency characteristic in accordance with, for example, an equal loudness curve defined in ISO 226: 2003. As for human hearing, when the volume is low, it becomes difficult to hear the high frequency component and the low frequency component. For this reason, when the volume setting value of the master volume 12 is lowered, the user may hear the sound quality with only the mid-range component emphasized. Therefore, the signal processing unit 181 performs loudness correction so that the level difference between the mid-frequency component, the low-frequency component, and the high-frequency component increases as the loudness correction value decreases in accordance with the equal loudness curve. This prevents the high frequency component and the low frequency component from becoming difficult to hear (the mid frequency component is emphasized). In the first correction mode, the user can adjust the volume with the master volume 12 and operate the loudness volume 17 to adjust the sound quality to a desired level.
　また、信号処理部１８１は、ＣＰＵ１３の指示に従って、マスタボリューム１２で受け付けた音量設定値の変化に応じて自動的にラウドネス補正を行う（第２補正モードを行なう）場合もある。ＣＰＵ１３は、測定音を用いてスピーカの特性（スピーカ特性）を取得した場合に、信号処理部１８１に対して、第２補正モードを行なう様に指示する。 Also, the signal processing unit 181 may automatically perform loudness correction (perform the second correction mode) in accordance with the change in the volume setting value received by the master volume 12 in accordance with an instruction from the CPU 13. When the CPU 13 acquires speaker characteristics (speaker characteristics) using the measurement sound, the CPU 13 instructs the signal processing unit 181 to perform the second correction mode.
　図３に示したように、入力Ｉ／Ｆ１６には、マイク１５０が接続される。マイク１５０は、聴取位置に設置される。ＣＰＵ１３は、測定音およびマイク１５０を用いて、スピーカ特性を取得する（この場合、ＣＰＵ１３は、スピーカ特性取得部として機能する）。例えば、ユーザが聴取位置にマイク１５０を設置し、不図示のリモコン等のユーザＩ／Ｆを用いて測定開始を指示すると、ＣＰＵ１３は、図５に示す動作を行う。 As shown in FIG. 3, a microphone 150 is connected to the input I / F 16. The microphone 150 is installed at the listening position. The CPU 13 acquires speaker characteristics using the measurement sound and the microphone 150 (in this case, the CPU 13 functions as a speaker characteristic acquisition unit). For example, when the user installs the microphone 150 at the listening position and instructs the start of measurement using a user I / F such as a remote controller (not shown), the CPU 13 performs the operation shown in FIG.
　図５は、スピーカ特性の取得および補正処理の動作を示すフローチャートである。ＣＰＵ１３は、測定音を生成し、スピーカから測定音を出力する（ｓ１１）。測定音は、例えば正弦波、ホワイトノイズ、またはピンクノイズ等である。 FIG. 5 is a flowchart showing the operation of the speaker characteristic acquisition and correction processing. CPU13 produces | generates a measurement sound and outputs a measurement sound from a speaker (s11). The measurement sound is, for example, a sine wave, white noise, pink noise, or the like.
　次に、ＣＰＵ１３は、マイク１５０で取得した音の信号レベル、および測定音を出力してからマイク１５０で該測定音に係る音を検出するまでの時間差を測定し、聴取位置における音量、およびスピーカと聴取位置との距離を測定する（ｓ１２）。ＣＰＵ１３は、該測定を全てのスピーカについて行なったか否かを確認し（ｓ１３）、全てのスピーカの測定が終わっていない場合には、スピーカを変更して、測定音の出力から処理を繰り返す（ｓ１５）。 Next, the CPU 13 measures the signal level of the sound acquired by the microphone 150 and the time difference from when the measurement sound is output until the sound related to the measurement sound is detected by the microphone 150, and the volume at the listening position and the speaker And the distance from the listening position are measured (s12). The CPU 13 confirms whether or not the measurement has been performed for all the speakers (s13). If the measurement has not been completed for all the speakers, the CPU 13 is changed and the process is repeated from the output of the measurement sound (s15). ).
　ＣＰＵ１３は、全てのスピーカについての測定が終わった場合、各スピーカの音量差、および距離の差を補正する（ｓ１４）。例えば、ＣＰＵ１３は、信号処理部１８１に対して、距離が近いスピーカに供給する信号を遅延させて、全てのスピーカから同じタイミングで音が到達するように補正させる。また、ＣＰＵ１３は、信号処理部１８１に対して、能率が低く、聴取位置における音量が低くなるスピーカに供給する信号のレベルを高くして、全てのスピーカから同じ音量で音が到達するように補正させる。また、ＣＰＵ１３は、測定音と、マイク１５０で取得した音の周波数特性を比較し、該周波数特性の補正を行ってもよい。例えば、ＣＰＵ１３は、信号処理部１８１に対して、低域の音量が小さくなるスピーカに供給する信号の低域のレベルを高くさせる。 CPU13 correct | amends the volume difference of each speaker, and the difference of distance, when the measurement about all the speakers is completed (s14). For example, the CPU 13 causes the signal processing unit 181 to delay a signal supplied to a speaker having a short distance so as to correct the sound to arrive from all the speakers at the same timing. Further, the CPU 13 corrects the signal processing unit 181 to increase the level of the signal supplied to the speaker with low efficiency and low volume at the listening position so that the sound reaches the same volume from all the speakers. Let Further, the CPU 13 may compare the frequency characteristics of the measurement sound and the sound acquired by the microphone 150 and correct the frequency characteristics. For example, the CPU 13 causes the signal processing unit 181 to increase the low frequency level of the signal supplied to the speaker in which the low frequency volume is reduced.
　信号処理部１８１は、以上の様にしてスピーカの特性を取得した場合には、第２補正モードを行なう。 The signal processing unit 181 performs the second correction mode when the speaker characteristics are acquired as described above.
　図６は、第１補正モードと第２補正モードとの切り替え動作を示すフローチャートである。ＣＰＵ１３は、オーディオ信号処理装置１の起動時、オーディオ信号が入力された時、オーディオ信号の出力を行なう時、またはユーザからリモコン等を介してラウドネス補正の開始を指示された時、等の任意のタイミングで、図６に示す動作を開始する。まず、ＣＰＵ１３は、スピーカ特性の測定結果があるか否かを判断する（ｓ２１）。 FIG. 6 is a flowchart showing the switching operation between the first correction mode and the second correction mode. The CPU 13 is optional when the audio signal processing device 1 is activated, when an audio signal is input, when an audio signal is output, or when the user is instructed to start loudness correction via a remote controller or the like. The operation shown in FIG. 6 is started at the timing. First, the CPU 13 determines whether there is a measurement result of speaker characteristics (s21).
　ＣＰＵ１３は、スピーカ特性の測定結果が無いと判断した場合、信号処理部１８１に対して、第１補正モードを実行させる（ｓ２２）。また、ＣＰＵ１３は、表示器１１を消灯する（ｓ２３）。これにより、ユーザは、現在の状態が手動補正モード（第１補正モード）であると判断することができる。この場合、ユーザは、マスタボリューム１２で音量を調整し、かつラウドネスボリューム１７を操作して好みの音質に調整することができる。 When the CPU 13 determines that there is no measurement result of the speaker characteristic, the CPU 13 causes the signal processing unit 181 to execute the first correction mode (s22). Further, the CPU 13 turns off the display 11 (s23). Thereby, the user can determine that the current state is the manual correction mode (first correction mode). In this case, the user can adjust the sound volume with the master volume 12 and operate the loudness volume 17 to adjust the sound quality to his or her preference.
　ＣＰＵ１３は、スピーカ特性の測定結果が有ると判断した場合、信号処理部１８１に対して、第２補正モードを実行させる（ｓ２４）。また、ＣＰＵ１３は、表示器１１を点灯する（ｓ２５）。これにより、ユーザは、現在の状態が自動補正モード（第２補正モード）であると判断することができる。 When the CPU 13 determines that there is a measurement result of the speaker characteristic, the CPU 13 causes the signal processing unit 181 to execute the second correction mode (s24). Further, the CPU 13 lights up the display 11 (s25). Thereby, the user can determine that the current state is the automatic correction mode (second correction mode).
　第２補正モードは、スピーカ特性およびマスタボリューム１２の音量設定値に応じて、ラウドネス補正を行うモードである。信号処理部１８１は、例えば、マスタボリューム１２の音量設定値が０ｄＢのときを基準として、周波数特性をフラットにする。これに対し、信号処理部１８１は、マスタボリューム１２の音量設定値が例えば－３０ｄＢのとき、図４に示した等ラウドネス曲線に準じた周波数特性に補正して、０ｄＢの時の聴感上の周波数特性が実現されるようにする。そして、信号処理部１８１は、スピーカ特性も考慮して、ラウドネス補正を行なう。例えば、マスタボリューム１２の音量設定値が０ｄＢであり８０ｐｈｏｎの音量が出力されるべきであるのに対して、スピーカの能率の影響、およびスピーカと聴取位置の距離の影響等を受けて、聴取位置では７５ｐｈｏｎの音量が測定された場合、信号処理部１８１は、図４におけるラウドネスボリューム１７のラウドネス補正値が－５ｄＢ時の周波数特性に補正する。また、例えば、マスタボリューム１２の音量設定値が－２０ｄＢであり６０ｐｈｏｎの音量が出力されるできであるのに対して、聴取位置では５０ｐｈｏｎの音量が測定された場合、信号処理部１８１は、図４におけるラウドネスボリューム１７のラウドネス補正値が－３０ｄＢ時の周波数特性に補正する。 The second correction mode is a mode for performing loudness correction in accordance with the speaker characteristics and the volume setting value of the master volume 12. For example, the signal processing unit 181 makes the frequency characteristic flat with reference to the time when the volume setting value of the master volume 12 is 0 dB. On the other hand, when the volume setting value of the master volume 12 is -30 dB, for example, the signal processing unit 181 corrects the frequency characteristics according to the equal loudness curve shown in FIG. Ensure that the characteristics are realized. Then, the signal processing unit 181 performs loudness correction in consideration of speaker characteristics. For example, the volume setting value of the master volume 12 is 0 dB and a volume of 80 phon should be output, but the listening position is affected by the efficiency of the speaker and the distance between the speaker and the listening position. When the volume of 75 phon is measured, the signal processing unit 181 corrects the frequency characteristic when the loudness correction value of the loudness volume 17 in FIG. 4 is −5 dB. Further, for example, when the volume setting value of the master volume 12 is −20 dB and a volume of 60 phon can be output, while the volume of 50 phon is measured at the listening position, the signal processing unit 181 4 is corrected to the frequency characteristic when the loudness correction value of the loudness volume 17 is −30 dB.
　このように、例えば、同じ音量設定値であっても、能率が低いスピーカである場合には、信号処理部１８１は、より低い音量設定値に応じた特性のラウドネス補正を行う。 Thus, for example, even if the sound volume setting value is the same, if the speaker is low in efficiency, the signal processing unit 181 performs loudness correction of the characteristic according to the lower sound volume setting value.
　以上の様な第２補正モードの場合、ユーザは、マスタボリューム１２で音量を調整すると、自動的に適切なラウドネス補正も行われる。 In the second correction mode as described above, when the user adjusts the volume with the master volume 12, appropriate loudness correction is automatically performed.
　信号処理部１８１は、第２補正モードでは、ユーザがラウドネスボリューム１７を操作しても、周波数特性を変更しない。ただし、オーディオ信号処理装置１は、図７に示すように、第２補正モードの実行中にユーザがラウドネスボリューム１７を操作した場合に、第１補正モードに移行するようにしてもよい。 In the second correction mode, the signal processing unit 181 does not change the frequency characteristics even if the user operates the loudness volume 17. However, as shown in FIG. 7, the audio signal processing apparatus 1 may shift to the first correction mode when the user operates the loudness volume 17 during the execution of the second correction mode.
　図７は、第２補正モードにおける動作を示すフローチャートである。ＣＰＵ１３は、第２補正モードにおいて、ラウドネスボリューム１７が操作されたか否かを判断する（ｓ３１）。ＣＰＵ１３は、ラウドネスボリューム１７が操作された場合には、信号処理部１８１に対して、第１補正モードを実行させる（ｓ３２）。また、ＣＰＵ１３は、表示器１１を消灯する（ｓ３３）。 FIG. 7 is a flowchart showing the operation in the second correction mode. The CPU 13 determines whether or not the loudness volume 17 has been operated in the second correction mode (s31). When the loudness volume 17 is operated, the CPU 13 causes the signal processing unit 181 to execute the first correction mode (s32). Further, the CPU 13 turns off the display 11 (s33).
　この場合、ユーザは、ラウドネスボリューム１７を操作するだけで、手動補正モードに簡単に移行させることができる。したがって、オーディオ信号処理装置１は、通常時にはマスタボリューム１２に応じて自動補正を行なうが、ラウドネスボリューム１７が操作されて、ユーザが手動で補正を行いたいと判断した場合には、自動的に手動補正モードに移行することができる。 In this case, the user can easily shift to the manual correction mode simply by operating the loudness volume 17. Accordingly, the audio signal processing apparatus 1 normally performs automatic correction according to the master volume 12, but when the loudness volume 17 is operated and the user determines that correction is to be performed manually, the audio signal processing apparatus 1 automatically performs manual correction. The mode can be shifted to the correction mode.
　この場合、ラウドネスボリューム１７が、第１補正モードまたは第２補正モードのいずれを行なうかの指示を受け付けるためのユーザＩ／Ｆとなる。ただし、オーディオ信号処理装置１は、第１補正モードまたは第２補正モードのいずれを行なうかの指示を受け付ける専用のユーザＩ／Ｆ（例えば切り替えスイッチ等）を備えていてもよい。 In this case, the loudness volume 17 is a user I / F for receiving an instruction to perform either the first correction mode or the second correction mode. However, the audio signal processing apparatus 1 may include a dedicated user I / F (for example, a changeover switch or the like) that receives an instruction to perform either the first correction mode or the second correction mode.
　なお、オーディオ信号処理装置１は、第２補正モードから第１補正モードに移行した場合に、さらに、所定の条件を満たした場合に、自動的に第２補正モードに戻るようにしてもよい。例えば、第２補正モードから第１補正モードに移行した後、所定時間の経過後に、自動的に第２補正モードに戻るようにしてもよい。また、オーディオ信号処理装置１は、図８または図９に示すような操作がユーザからなされた場合に、第２補正モードに戻るようにしてもよい。 The audio signal processing apparatus 1 may automatically return to the second correction mode when the second correction mode is shifted to the first correction mode and further when a predetermined condition is satisfied. For example, after shifting from the second correction mode to the first correction mode, it may be automatically returned to the second correction mode after a predetermined time has elapsed. The audio signal processing apparatus 1 may return to the second correction mode when an operation as shown in FIG. 8 or FIG. 9 is performed by the user.
　図８は、ラウドネスボリューム１７のラウドネス補正値がデフォルト値（０ｄＢ）に戻された場合に、第１補正モードから第２補正モードに移行する態様を示すフローチャートである。 FIG. 8 is a flowchart showing a mode of shifting from the first correction mode to the second correction mode when the loudness correction value of the loudness volume 17 is returned to the default value (0 dB).
　ＣＰＵ１３は、第１補正モードにおいて、ラウドネスボリューム１７が操作されて、ラウドネス補正値がデフォルト値（０ｄＢ）に戻されたか否かを判断する（ｓ４１）。ＣＰＵ１３は、ラウドネス補正値がデフォルト値（０ｄＢ）に戻されたと判断した場合には、信号処理部１８１に対して、第２補正モードを実行させる（ｓ４２）。また、ＣＰＵ１３は、表示器１１を点灯する（ｓ４３）。 In the first correction mode, the CPU 13 determines whether or not the loudness volume 17 has been operated and the loudness correction value has been returned to the default value (0 dB) (s41). When determining that the loudness correction value has been returned to the default value (0 dB), the CPU 13 causes the signal processing unit 181 to execute the second correction mode (s42). Further, the CPU 13 lights up the display 11 (s43).
　このように、オーディオ信号処理装置１は、ユーザが手動補正をやめたい、という意図があると判断した場合に、自動補正に移行することもできる。 Thus, the audio signal processing apparatus 1 can also shift to automatic correction when it is determined that the user intends to stop manual correction.
　図９は、スピーカの出力先を切り替えた場合に、第１補正モードから第２補正モードに移行する態様を示すフローチャートである。 FIG. 9 is a flowchart showing a mode of shifting from the first correction mode to the second correction mode when the output destination of the speaker is switched.
　ＣＰＵ１３は、第１補正モードにおいて、スピーカの出力先が切り替えられたか否かを判断する（ｓ５１）。上述のように、出力Ｉ／Ｆ２０は、複数系統（例えばＡ系統およびＢ系統）の接続端子を有する。ユーザは、リモコン等のユーザＩ／Ｆ（不図示）を用いて、Ａ系統またはＢ系統のスピーカから放音させる、両系統のスピーカから放音させる、あるいは、すべてのスピーカから放音させない、等を指示することができる。ＣＰＵ１３は、このようなスピーカの出力先を切り替える動作を行なう場合には、切り替え後に用いるスピーカの特性の測定結果があるか否かを判断する（ｓ５２）。 CPU 13 determines whether or not the output destination of the speaker has been switched in the first correction mode (s51). As described above, the output I / F 20 has connection terminals of a plurality of systems (for example, A system and B system). The user uses a user I / F (not shown) such as a remote controller to emit sound from the A or B system speakers, to emit sound from both speakers, or not to emit sound from all speakers, etc. Can be instructed. When performing the operation of switching the output destination of the speaker, the CPU 13 determines whether or not there is a measurement result of the characteristics of the speaker used after the switching (s52).
　ＣＰＵ１３は、スピーカ特性の測定結果が無いと判断した場合、第１補正モードを維持する。一方で、ＣＰＵ１３は、スピーカ特性の測定結果が有ると判断した場合に、信号処理部１８１に対して、第２補正モードを実行させる（ｓ５３）。また、ＣＰＵ１３は、表示器１１を点灯する（ｓ５４）。 When the CPU 13 determines that there is no measurement result of speaker characteristics, the CPU 13 maintains the first correction mode. On the other hand, when determining that there is a measurement result of the speaker characteristic, the CPU 13 causes the signal processing unit 181 to execute the second correction mode (s53). Further, the CPU 13 lights up the display 11 (s54).
　このように、オーディオ信号処理装置１は、スピーカが変更される場合には、まずは自動補正モードに移行して、ユーザに対して最適なラウドネス補正の環境を提供することができる。 As described above, when the speaker is changed, the audio signal processing apparatus 1 can first shift to the automatic correction mode and provide the user with an optimum loudness correction environment.
　最後に、本実施形態の説明は、すべての点で例示であって、制限的なものではない。本発明の範囲は、上述の実施形態ではなく、特許請求の範囲によって示される。さらに、本発明の範囲には、特許請求の範囲と均等の意味および範囲内でのすべての変更が含まれることが意図される。 Finally, the description of this embodiment is illustrative in all respects and not restrictive. The scope of the present invention is shown not by the above embodiments but by the claims. Furthermore, the scope of the present invention is intended to include all modifications within the meaning and scope equivalent to the scope of the claims.
１…オーディオ信号処理装置
１１…表示器
１２…マスタボリューム
１３…ＣＰＵ
１４…ＲＯＭ
１５…ＲＡＭ
１６…入力Ｉ／Ｆ
１７…ラウドネスボリューム
１８…ＤＳＰ
１９…アンプ
２０…出力Ｉ／Ｆ
２５…バス
１００Ｌ，１００Ｒ，１０１Ｌ，１０１Ｒ…スピーカ
１５０…マイク
１８１…信号処理部
１８２…レベル調整部 DESCRIPTION OF SYMBOLS 1 ... Audio signal processing apparatus 11 ... Display device 12 ... Master volume 13 ... CPU
14 ... ROM
15 ... RAM
16 ... Input I / F
17 ... Loudness volume 18 ... DSP
19 ... Amplifier 20 ... Output I / F
25 ... Buses 100L, 100R, 101L, 101R ... Speaker 150 ... Microphone 181 ... Signal processing unit 182 ... Level adjustment unit

Claims (9)

  1. 　音量設定値を受け付ける音量設定受付部と、
    　スピーカの特性を取得するスピーカ特性取得部と、
    　ラウドネス補正値を受け付けるラウドネス補正受付部と、
    　前記ラウドネス補正受付部で受け付けた前記ラウドネス補正値に応じてラウドネス補正を行う第１補正モードと、前記スピーカ特性取得部が前記スピーカの特性を取得した場合に、該スピーカの特性および前記音量設定値の変化に応じてラウドネス補正を行なう第２補正モードと、のいずれかを行なう信号処理部と、
    　を備えたオーディオ信号処理装置。     A volume setting reception unit for receiving a volume setting value;
    A speaker characteristic acquisition unit for acquiring speaker characteristics;
    A loudness correction receiving unit for receiving a loudness correction value;
    A first correction mode for performing loudness correction in accordance with the loudness correction value received by the loudness correction receiving unit; and when the speaker characteristic acquisition unit acquires the characteristic of the speaker, the speaker characteristic and the volume setting value A signal processing unit for performing any one of a second correction mode for performing loudness correction according to a change in
    An audio signal processing apparatus comprising:
  2. 　前記信号処理部が現在、前記第１補正モードまたは前記第２補正モードのいずれを行なうかを示す表示器を備えた、
    　請求項１に記載のオーディオ信号処理装置。     The signal processing unit includes a display indicating whether the first correction mode or the second correction mode is currently performed;
    The audio signal processing apparatus according to claim 1.
  3. 　ユーザから、前記第１補正モード、または前記第２補正モード、のいずれを行なうかの指示を受け付けるユーザインタフェースを備えた、
    　請求項１または請求項２に記載のオーディオ信号処理装置。     A user interface that receives an instruction from the user to perform either the first correction mode or the second correction mode;
    The audio signal processing device according to claim 1 or 2.
  4. 　前記信号処理部は、前記第２補正モードを実行している状態において、前記ラウドネス補正受付部で前記ラウドネス補正値を受け付けた場合には、前記第１補正モードに移行する、
    　請求項１乃至請求項３のいずれかに記載のオーディオ信号処理装置。     The signal processing unit shifts to the first correction mode when the loudness correction receiving unit receives the loudness correction value in the state of executing the second correction mode.
    The audio signal processing apparatus according to any one of claims 1 to 3.
  5. 　前記信号処理部は、前記第１補正モードに移行した後に、所定の条件を満たした場合に、前記第１補正モードから前記第２補正モードに移行する、
    　請求項４に記載のオーディオ信号処理装置。     The signal processing unit shifts from the first correction mode to the second correction mode when a predetermined condition is satisfied after shifting to the first correction mode.
    The audio signal processing apparatus according to claim 4.
  6. 　前記信号処理部は、前記ラウドネス補正受付部において、前記ラウドネス補正値がデフォルト値に戻された場合に、前記第１補正モードから前記第２補正モードに移行する、
    　請求項５に記載のオーディオ信号処理装置。     The signal processing unit shifts from the first correction mode to the second correction mode when the loudness correction value is returned to a default value in the loudness correction receiving unit.
    The audio signal processing apparatus according to claim 5.
  7. 　出力インタフェースを備え、
    　前記信号処理部は、前記出力インタフェースにおける出力先が変更された場合に、前記第１補正モードから前記第２補正モードに移行する、
    　請求項５または請求項６に記載のオーディオ信号処理装置。     With output interface,
    The signal processing unit shifts from the first correction mode to the second correction mode when the output destination in the output interface is changed.
    The audio signal processing apparatus according to claim 5 or 6.
  8. 　音量設定値を受け付け、
    　スピーカの特性を取得し、
    　ラウドネス補正値を受け付け、
    　受け付けた前記ラウドネス補正値に応じてラウドネス補正を行う第１補正モードと、前記スピーカの特性を取得した場合に、該スピーカの特性および前記音量設定値の変化に応じてラウドネス補正を行なう第２補正モードと、のいずれかを行なう、
    　オーディオ信号処理方法。     Accept the volume setting value,
    Get speaker characteristics,
    Accept loudness correction value,
    A first correction mode for performing loudness correction in accordance with the received loudness correction value; and a second correction for performing loudness correction in accordance with changes in the characteristics of the speaker and the volume setting value when the characteristics of the speaker are acquired. One of the modes,
    Audio signal processing method.
  9. 　オーディオ信号処理装置に、
    　音量設定値を受け付け、
    　スピーカの特性を取得し、
    　ラウドネス補正値を受け付け、
    　受け付けた前記ラウドネス補正値に応じてラウドネス補正を行う第１補正モードと、前記スピーカの特性を取得した場合に、該スピーカの特性および前記音量設定値の変化に応じてラウドネス補正を行なう第２補正モードと、のいずれかを実行させる、
    　プログラム。     Audio signal processing device
    Accept the volume setting value,
    Get speaker characteristics,
    Accept loudness correction value,
    A first correction mode for performing loudness correction in accordance with the received loudness correction value; and a second correction for performing loudness correction in accordance with changes in the characteristics of the speaker and the volume setting value when the characteristics of the speaker are acquired. To execute one of the modes,
    program.
PCT/JP2017/010857 2017-03-17 2017-03-17 Audio signal processing device, audio signal processing method, and program WO2018167941A1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015179991A (en) * 2014-03-19 2015-10-08 ヤマハ株式会社 Audio signal processing device
JP2016520854A (en) * 2013-03-21 2016-07-14 インテレクチュアル ディスカバリー カンパニー リミテッド Audio signal size control method and apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016520854A (en) * 2013-03-21 2016-07-14 インテレクチュアル ディスカバリー カンパニー リミテッド Audio signal size control method and apparatus
JP2015179991A (en) * 2014-03-19 2015-10-08 ヤマハ株式会社 Audio signal processing device

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