Title:
METHOD AND DEVICE FOR EMPHASIZING PITCH
Document Type and Number:
WIPO Patent Application WO/1999/038156
Kind Code:
A1
Abstract:
An LPC inverse filter (301) calculates a residual signal from a decoded sound. A first lag value calculating section (302) calculates a first lag value (T1) from the residual signal (r(n)), and a second lag value calculating section (303) calculates a second lag value (T2). The second lag value (T2) is calculated as a lag value for maximizing the correlation value of the residual value or a value concerning the correlation value in a range including the decimal parts over and below the first lag value (T1) or a lag value twice the integer part of the first lag value (T1). The decoded sound is subjected to pitch-emphasis filtering with the signal waveforms at the first and second lag values.
Inventors:
YOSHIDA KOJI (JP)
Application Number:
PCT/JP1999/000293
Publication Date:
July 29, 1999
Filing Date:
January 26, 1999
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
YOSHIDA KOJI (JP)
YOSHIDA KOJI (JP)
International Classes:
G10L21/00; G10L19/06; G10L19/09; G10L21/0232; (IPC1-7): G10L9/00; G10L9/18; H03M7/30; H04B14/04
Foreign References:
| JPS60118898A | 1985-06-26 | |||
| JPH05173596A | 1993-07-13 | |||
| JPH08179795A | 1996-07-12 | |||
| JPH08211895A | 1996-08-20 | |||
| JPH09152897A | 1997-06-10 | |||
| JPH09212194A | 1997-08-15 | |||
| JPH1039899A | 1998-02-13 |
Other References:
See also references of EP 0971337A4
Attorney, Agent or Firm:
Washida, Kimihito (Tsurumaki 1-chome Tama-shi Tokyo, JP)
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