Title:
BAND ENHANCEMENT METHOD, BAND ENHANCEMENT APPARATUS, PROGRAM, INTEGRATED CIRCUIT AND AUDIO DECODER APPARATUS
Document Type and Number:
WIPO Patent Application WO/2011/155170
Kind Code:
A1
Abstract:
Provided is a band enhancement method that can reduce the calculation amounts for enhancing bands and further can suppress the quality degradation of enhanced bands. The band enhancement method comprises the steps of: transforming a low frequency band signal to a QMF range, thereby generating a first low frequency QMF spectrum (S11); applying mutually different shift factors to the low frequency band signal, thereby generating a plurality of pitch-shifted signals (S12); performing a time decompression in the QMF range, thereby generating a high frequency QMF spectrum (S13); modifying the high frequency QMF spectrum (S14); and combining the modified high frequency QMF spectrum with the first low frequency QMF spectrum (S15).
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Inventors:
ISHIKAWA, Tomokazu (())
石川 智一 (())
NORIMATSU, Takeshi (())
則松 武志 (())
ZHOU, Huan (())
石川 智一 (())
NORIMATSU, Takeshi (())
則松 武志 (())
ZHOU, Huan (())
Application Number:
JP2011/003168
Publication Date:
December 15, 2011
Filing Date:
June 06, 2011
Export Citation:
Assignee:
PANASONIC CORPORATION (1006, Oaza Kadoma Kadoma-sh, Osaka 01, 〒5718501, JP)
パナソニック株式会社 (〒01 大阪府門真市大字門真１００６番地 Osaka, 〒5718501, JP)
ISHIKAWA, Tomokazu (())
石川 智一 (())
NORIMATSU, Takeshi (())
則松 武志 (())
パナソニック株式会社 (〒01 大阪府門真市大字門真１００６番地 Osaka, 〒5718501, JP)
ISHIKAWA, Tomokazu (())
石川 智一 (())
NORIMATSU, Takeshi (())
則松 武志 (())
International Classes:
G10L21/04; G10L11/00; G10L19/00; G10L19/02
Attorney, Agent or Firm:
NII, Hiromori (6F Tanaka Ito Pia Shin-Osaka Bldg.,3-10, Nishi Nakajima 5-chome, Yodogawa-ku, Osaka-cit, Osaka 11, 〒5320011, JP)
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Claims: