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Title:
SUB-BAND ADAPTIVE DIFFERENTIAL PULSE CODE MODULATION/ENCODING APPARATUS, SUB-BAND ADAPTIVE DIFFERENTIAL PULSE CODE MODULATION/ENCODING METHOD, WIRELESS TRANSMISSION SYSTEM, SUB-BAND ADAPTIVE DIFFERENTIAL PULSE CODE MODULATION/DECODING APPARATUS, SUB-BAND ADAPTIVE DIFFERENTIAL PULSE CODE MODULATION/DECODING METHOD, AND WIREL
Document Type and Number:
WIPO Patent Application WO/2002/091588
Kind Code:
A1
Abstract:
A sub-band adaptive differential pulse code modulation/encoding apparatus includes means (102, 103, 104, 105) having a predetermined asymmetric impulse response for receiving an audio signal and band-dividing the received audio signal into a predetermined number of sub-bands, so as to obtain a plurality of band-divided sub-band audio signal, a plurality of quantization means (110, 111, 112, 113) for quantizing the band-divided sub-band audio signals by a predetermined divider, and encoding means (115) for performing adaptive differential pulse code modulation/encoding of the quantized sub-band audio signals.

Inventors:
Banba, Yutaka (1-1-21, Fukamihigashi Yamato-shi, Kanagawa, 242-0012, JP)
Takagi, Yoshiaki (4-7-5-301, Edanishi Aoba-ku Yokohama-shi, Kanagawa, 225-0014, JP)
Application Number:
PCT/JP2002/004384
Publication Date:
November 14, 2002
Filing Date:
May 02, 2002
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (1006, Oaza Kadoma Kadoma-shi, Osaka, 571-8501, JP)
Banba, Yutaka (1-1-21, Fukamihigashi Yamato-shi, Kanagawa, 242-0012, JP)
Takagi, Yoshiaki (4-7-5-301, Edanishi Aoba-ku Yokohama-shi, Kanagawa, 225-0014, JP)
International Classes:
H03H17/02; G10L19/02; H03M7/30; H03M7/38; H04B1/66; H04B14/04; H04B14/06; (IPC1-7): H03M7/38
Domestic Patent References:
WO1989007866A1
Foreign References:
JPS59127440A
JPS62248327A
Other References:
See also references of EP 1396938A1
Attorney, Agent or Firm:
Ariga, Gunichiro (No.2 Tanaka Building 6-9, Yoyogi 2-chome Shibuya-ku, Tokyo, 151-0053, JP)
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