Title:
雑音抑圧装置
Document Type and Number:
Japanese Patent JP4348369
Kind Code:
B2
Abstract:
A noise suppresser is provided which does not generate steady noise generated by a drop in the receiving field strength, pulse-type unsteady noise generated in a multipass environment and the like as well as musical noise due to excessive subtraction and the like. The noise suppresser (100) includes a field strength analysis unit (3) which analyzes change in a field strength d of a digital signal x, and a frame generation unit (1) which generates a frame made up of signal values accumulated within a range which does not exceed a predetermined threshold value when the analyzed field strength has changed and exceeds the predetermined threshold value. Further, the noise suppresser (100) includes a noise estimation unit (4) which estimates a noise pattern |N|n' mixed in the input signal x when the field strength has changed and exceeds the predetermined threshold value, and a noise suppression unit (5) which suppresses the noise included in the generated frame using the estimated noise pattern.
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Inventors:
Shinya Gozen
Application Number:
JP2006543197A
Publication Date:
October 21, 2009
Filing Date:
October 26, 2005
Export Citation:
Assignee:
Panasonic Corporation
International Classes:
H04B1/10
Domestic Patent References:
| JP5315985A | ||||
| JP11154926A | ||||
| JP2003316381A |
Attorney, Agent or Firm:
Hiromori Arai