WO2003019529A1 - Input/output acoustic signal processing device, input/output acoustic signal processing method, input/output acoustic signal processing program, and recording medium on which input/output acoustic signal processing program is recorded - Google Patents

Input/output acoustic signal processing device, input/output acoustic signal processing method, input/output acoustic signal processing program, and recording medium on which input/output acoustic signal processing program is recorded Download PDF

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Publication number
WO2003019529A1
WO2003019529A1 PCT/JP2002/008229 JP0208229W WO03019529A1 WO 2003019529 A1 WO2003019529 A1 WO 2003019529A1 JP 0208229 W JP0208229 W JP 0208229W WO 03019529 A1 WO03019529 A1 WO 03019529A1
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WO
WIPO (PCT)
Prior art keywords
acoustic signal
signal processing
input
output acoustic
signals
Prior art date
Application number
PCT/JP2002/008229
Other languages
French (fr)
Japanese (ja)
Inventor
Yoshiaki Takagi
Original Assignee
Matsushita Electric Industrial Co., Ltd.
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 Matsushita Electric Industrial Co., Ltd. filed Critical Matsushita Electric Industrial Co., Ltd.
Publication of WO2003019529A1 publication Critical patent/WO2003019529A1/en

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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
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques

Landscapes

  • Engineering & Computer Science (AREA)
  • Computational Linguistics (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)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

An acoustic signal processing device (10) for converting an acoustic signal to be sent to a destination through a communication line into a coded bit stream and outputting the bit stream to the main body of a communication apparatus, comprising a bandwidth division filter (11) for dividing an input acoustic signal into signals of the respective frequency bands, ADPCM quantizing means (13) for quantizing the signals of the frequency bands into quanta of a predetermined number of bits, and bit stream generating means (23) for shaping the quantized signals into a bit stream, wherein the acoustic signal processing device (10) further comprises ADPCM dequantizing means (15) for dequantizing the quantized signal, data storage means (17) for storing the dequantized signal over a plurality of frames, energy calculating means (19) for calculating the energy of the stored signals, and bit distribution calculating means (21) for calculating the number of bits needed for quantization from the energy of the stored signals, whereby the sampling bit rate used by the ADPCM quantizing means (13) is determined.
PCT/JP2002/008229 2001-08-23 2002-08-13 Input/output acoustic signal processing device, input/output acoustic signal processing method, input/output acoustic signal processing program, and recording medium on which input/output acoustic signal processing program is recorded WO2003019529A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001-253185 2001-08-23
JP2001253185A JP2003067000A (en) 2001-08-23 2001-08-23 Apparatus, method and program for processing acoustic signal and recording medium with program for processing acoustic signal recorded thereon

Publications (1)

Publication Number Publication Date
WO2003019529A1 true WO2003019529A1 (en) 2003-03-06

Family

ID=19081555

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2002/008229 WO2003019529A1 (en) 2001-08-23 2002-08-13 Input/output acoustic signal processing device, input/output acoustic signal processing method, input/output acoustic signal processing program, and recording medium on which input/output acoustic signal processing program is recorded

Country Status (2)

Country Link
JP (1) JP2003067000A (en)
WO (1) WO2003019529A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0522151A (en) * 1991-07-09 1993-01-29 Toshiba Corp Band divided encoding system
JPH08167247A (en) * 1994-12-15 1996-06-25 Sony Corp High-efficiency encoding method and device as well as transmission medium
JPH09261064A (en) * 1996-03-26 1997-10-03 Mitsubishi Electric Corp Encoder and decoder

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0522151A (en) * 1991-07-09 1993-01-29 Toshiba Corp Band divided encoding system
JPH08167247A (en) * 1994-12-15 1996-06-25 Sony Corp High-efficiency encoding method and device as well as transmission medium
JPH09261064A (en) * 1996-03-26 1997-10-03 Mitsubishi Electric Corp Encoder and decoder

Also Published As

Publication number Publication date
JP2003067000A (en) 2003-03-05

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