Title:
SOUND SIGNAL ENCODING METHOD
Document Type and Number:
Japanese Patent JP3520955
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To perform excellent auditory weighting for a broad-band signal like music.
SOLUTION: For an input signal, linear prediction of p'th order (41) is performed to constitute a reverse filter 42, the prediction residue of the input signal is found through the reverse filter 42, and its residue signal is processed by linear predictive analysis (43) of (n)th order (n>p) to generate a linear filter (45), whose impulse response is calculated (47), converted into a frequency range (49), and deformed (51) with auditory characteristics. A linear predictive filter 44 of (p)th order, on the other hand, is generated, the frequency range signal of its filter coefficient is deformed (50) into auditory characteristics, the error signal between the input signal and composite signal is converted (53) into a frequency range, and the error signal is multiplied by the outputs of converting means 50 and 51 to give auditory weight (52 and 54); and encoding is carried out so that the error becomes minimum.
Inventors:
Sasaki, Shigeaki
Kataoka, Akitoshi
Kataoka, Akitoshi
Application Number:
JP10430897A
Publication Date:
April 19, 2004
Filing Date:
April 22, 1997
Export Citation:
Assignee:
NIPPON TELEGR & TELEPH CORP <NTT>
International Classes:
G10L19/06; G10L19/08; G10L19/12; G10L19/16; (IPC1-7): G10L19/06; G10L19/12
Attorney, Agent or Firm:
草野 卓 （外１名）
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