Title:
周波数間引き装置、周波数間引き方法及び記録媒体
Document Type and Number:
Japanese Patent JP3576935
Kind Code:
B2
Abstract:
A device and a method for compressing signal information by removing (thinning out) the signal component of a signal in a specific frequency band. Firstly, an input time-series signal (e.g., a PCM signal) is converted by an analyzer ( 11 ) into a spectrum signal. Next, of the bands obtained by dividing the spectrum equally into bands, the band having a predetermined or higher correlation in the spectrum distribution with the lower frequency band is specified as a harmonic band by a frequency band masking unit ( 12 ). Then, a removal band from which the spectrum is to be removed is determined from the harmonic band, and the spectrum signal of this removal band, from which the spectrum component has been removed (namely the frequency component has been thinned out), is fed to a synthesizer ( 13 ).
Inventors:
Yasushi Sato
Application Number:
JP2000220742A
Publication Date:
October 13, 2004
Filing Date:
July 21, 2000
Export Citation:
Assignee:
Kenwood Corporation
International Classes:
G10L19/02; G10L13/00; G10L19/00; G10L19/032; G10L21/0388; G10L21/057; H03H17/00; H03H17/02; H03M7/30; H04B1/66; H04B14/04; (IPC1-7): G10L19/02; G10L13/00; G10L19/00
Domestic Patent References:
| JP6442938A | ||||
| JP2235424A | ||||
| JP5297898A | ||||
| JP651800A | ||||
| JP200036755A |
Attorney, Agent or Firm:
Kimura Mitsuru