WO2008129853A1 - Audio band extension device - Google Patents

Audio band extension device Download PDF

Info

Publication number
WO2008129853A1
WO2008129853A1 PCT/JP2008/000821 JP2008000821W WO2008129853A1 WO 2008129853 A1 WO2008129853 A1 WO 2008129853A1 JP 2008000821 W JP2008000821 W JP 2008000821W WO 2008129853 A1 WO2008129853 A1 WO 2008129853A1
Authority
WO
WIPO (PCT)
Prior art keywords
audio signal
frequency
extension device
frequency band
component
Prior art date
Application number
PCT/JP2008/000821
Other languages
French (fr)
Japanese (ja)
Inventor
Tatsuya Suzuki
Mitsuhiro Miyashita
Shinichi Harigae
Original Assignee
Panasonic Corporation
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 Panasonic Corporation filed Critical Panasonic Corporation
Publication of WO2008129853A1 publication Critical patent/WO2008129853A1/en

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/038—Speech enhancement, e.g. noise reduction or echo cancellation using band spreading techniques

Landscapes

  • Engineering & Computer Science (AREA)
  • Computational Linguistics (AREA)
  • Quality & Reliability (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)

Abstract

Provided is an audio band extension device which can realize complementation of a high-range component appropriate for a frequency band of an inputted audio signal. A frequency band of an original audio signal is predicted according to accompanying information on the original audio signal. According to the predicted frequency band, the sampling frequency to be converted is decided. The audio signal after subjected to the sampling frequency conversion is further subjected to a 1/2 down sampling process and a 2-multiplication up sampling process so as to generate a high-requency component. The audio signal for which a high-frequency component is generated is filtered by a low-pass filter having a predetermined attenuation feature for output.
PCT/JP2008/000821 2007-04-03 2008-03-31 Audio band extension device WO2008129853A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-097107 2007-04-03
JP2007097107A JP2010145426A (en) 2007-04-03 2007-04-03 Audio band extension device

Publications (1)

Publication Number Publication Date
WO2008129853A1 true WO2008129853A1 (en) 2008-10-30

Family

ID=39875385

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/000821 WO2008129853A1 (en) 2007-04-03 2008-03-31 Audio band extension device

Country Status (2)

Country Link
JP (1) JP2010145426A (en)
WO (1) WO2008129853A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010085876A (en) * 2008-10-02 2010-04-15 Clarion Co Ltd High frequency complementing device
JP5409377B2 (en) * 2007-10-23 2014-02-05 クラリオン株式会社 High-frequency interpolation device and high-frequency interpolation method
CN110176247A (en) * 2018-11-30 2019-08-27 株式会社索思未来 Signal processing apparatus and signal processing method

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010085877A (en) * 2008-10-02 2010-04-15 Clarion Co Ltd Acoustic compensation apparatus
JP5750589B2 (en) * 2010-12-17 2015-07-22 パナソニックＩｐマネジメント株式会社 Loudspeaker
KR101773353B1 (en) * 2016-04-19 2017-08-31 주식회사 오르페오사운드웍스 Apparatus and method for compensating timbre

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002082685A (en) * 2000-06-26 2002-03-22 Matsushita Electric Ind Co Ltd Device and method for expanding audio bandwidth
JP2004317622A (en) * 2003-04-14 2004-11-11 Matsushita Electric Ind Co Ltd Sound reproducing device
JP2006064884A (en) * 2004-08-25 2006-03-09 Kenwood Corp Audio device
JP2006119524A (en) * 2004-10-25 2006-05-11 Alpine Electronics Inc Sound reproducing machine and sound reproducing method
JP2006243041A (en) * 2005-02-28 2006-09-14 Yutaka Yamamoto High-frequency interpolating device and reproducing device
JP2006243043A (en) * 2005-02-28 2006-09-14 Sanyo Electric Co Ltd High-frequency interpolating device and reproducing device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002082685A (en) * 2000-06-26 2002-03-22 Matsushita Electric Ind Co Ltd Device and method for expanding audio bandwidth
JP2004317622A (en) * 2003-04-14 2004-11-11 Matsushita Electric Ind Co Ltd Sound reproducing device
JP2006064884A (en) * 2004-08-25 2006-03-09 Kenwood Corp Audio device
JP2006119524A (en) * 2004-10-25 2006-05-11 Alpine Electronics Inc Sound reproducing machine and sound reproducing method
JP2006243041A (en) * 2005-02-28 2006-09-14 Yutaka Yamamoto High-frequency interpolating device and reproducing device
JP2006243043A (en) * 2005-02-28 2006-09-14 Sanyo Electric Co Ltd High-frequency interpolating device and reproducing device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5409377B2 (en) * 2007-10-23 2014-02-05 クラリオン株式会社 High-frequency interpolation device and high-frequency interpolation method
JP2010085876A (en) * 2008-10-02 2010-04-15 Clarion Co Ltd High frequency complementing device
CN110176247A (en) * 2018-11-30 2019-08-27 株式会社索思未来 Signal processing apparatus and signal processing method
US10564927B1 (en) 2018-11-30 2020-02-18 Socionext Inc. Signal processing apparatus and signal processing method
CN110176247B (en) * 2018-11-30 2022-11-22 株式会社索思未来 Signal processing device and signal processing method

Also Published As

Publication number Publication date
JP2010145426A (en) 2010-07-01

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