[go: up one dir, main page]

WO2018167941A1 - Dispositif de traitement de signal audio, procédé de traitement de signal audio, et programme - Google Patents

Dispositif de traitement de signal audio, procédé de traitement de signal audio, et programme Download PDF

Info

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
Authority
WO
WIPO (PCT)
Prior art keywords
correction
signal processing
loudness
audio signal
speaker
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2017/010857
Other languages
English (en)
Japanese (ja)
Inventor
川合　洋成
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yamaha Corp
Original Assignee
Yamaha Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yamaha Corp filed Critical Yamaha Corp
Priority to PCT/JP2017/010857 priority Critical patent/WO2018167941A1/fr
Publication of WO2018167941A1 publication Critical patent/WO2018167941A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • 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.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

L'invention concerne un dispositif de traitement de signal audio est pourvu d'une unité de réception de réglage de volume sonore, d'une unité d'acquisition de caractéristique de haut-parleur, d'une unité de réception de correction de sonie et d'une unité de traitement de signal. L'unité de réception de réglage de volume sonore reçoit une valeur de réglage de volume sonore. L'unité d'acquisition de caractéristique de haut-parleur acquiert des caractéristiques de haut-parleur. L'unité de réception de correction de sonie reçoit une valeur de correction de sonie. L'unité de traitement de signal fonctionne dans un premier mode de correction, dans lequel une correction de sonie doit être effectuée correspondant à la valeur de correction de sonie reçue par l'unité de réception de correction de sonie, ou un second mode de correction, dans laquelle la correction de sonie doit être effectuée correspondant aux caractéristiques de haut-parleur et un changement de la valeur de réglage de volume sonore dans les cas où l'unité d'acquisition de caractéristique de haut-parleur a acquis les caractéristiques de haut-parleur.
PCT/JP2017/010857 2017-03-17 2017-03-17 Dispositif de traitement de signal audio, procédé de traitement de signal audio, et programme Ceased WO2018167941A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2017/010857 WO2018167941A1 (fr) 2017-03-17 2017-03-17 Dispositif de traitement de signal audio, procédé de traitement de signal audio, et programme

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2017/010857 WO2018167941A1 (fr) 2017-03-17 2017-03-17 Dispositif de traitement de signal audio, procédé de traitement de signal audio, et programme

Publications (1)

Publication Number Publication Date
WO2018167941A1 true WO2018167941A1 (fr) 2018-09-20

Family

ID=63521982

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2017/010857 Ceased WO2018167941A1 (fr) 2017-03-17 2017-03-17 Dispositif de traitement de signal audio, procédé de traitement de signal audio, et programme

Country Status (1)

Country Link
WO (1) WO2018167941A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015179991A (ja) * 2014-03-19 2015-10-08 ヤマハ株式会社 オーディオ信号処理装置
JP2016520854A (ja) * 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 オーディオ信号大きさの制御方法及び装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016520854A (ja) * 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 オーディオ信号大きさの制御方法及び装置
JP2015179991A (ja) * 2014-03-19 2015-10-08 ヤマハ株式会社 オーディオ信号処理装置

Similar Documents

Publication Publication Date Title
US9516444B2 (en) Wireless control and calibration of audio system
US8831934B2 (en) Speech enhancement method and system
JP6439261B2 (ja) オーディオ信号処理装置
US20120014538A1 (en) Audio equipment and a control method thereof
US8917873B2 (en) Method and apparatus for reducing TDMA noise in mobile communication terminal
KR101959956B1 (ko) 원스톱 보청 장치 피팅 시스템
US8520864B2 (en) Projector and audio output method
WO2018167941A1 (fr) Dispositif de traitement de signal audio, procédé de traitement de signal audio, et programme
JP2010212898A (ja) 音声信号処理装置及びテレビジョン受像機
KR102266560B1 (ko) 무선통신 기반의 다채널 오디오 믹싱 장치 및 그 방법
JP4487255B2 (ja) 音声出力装置
JP2010098562A (ja) 音声調整システム、調整方法およびリモートコントローラ
JP5269658B2 (ja) ヘッドアンプとその制御方法
JPH0847079A (ja) 音響装置
US12089020B2 (en) Headphone, and volume adjustment method thereof
JP4802848B2 (ja) コントロール機器、音量制御可否判定方法および音量制御可否判定プログラム
KR20250113601A (ko) 텔레비전 볼륨 자동 조정장치
JP4635479B2 (ja) 音声出力装置及び音声出力方法
KR100245123B1 (ko) 텔레비전 음량을 자동으로 변환시키는 방법 및 이를 수행하기 위한 장치
KR100589602B1 (ko) 무선 홈씨어터 시스템의 오디오 조정 방법 및 장치
JP4610433B2 (ja) オーディオシステム用セットアップ装置、オーディオシステム用セットアップ方法及びプログラム
JP2010028582A (ja) 音声処理装置及び音声処理システム
TW202038634A (zh) 音訊處理裝置、系統與方法
JP2007241134A (ja) オーディオ信号処理方法および再生装置
JP2015173343A (ja) オーディオ信号処理装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17900375

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17900375

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP