Title:
フィルタ適応周波数分解能
Document Type and Number:
Japanese Patent JP5227946
Kind Code:
B2
Abstract:
In signal processing using digital filtering the representation of a filter is adapted depending on the filter characteristics If e.g. a digital filter is represented by filter coefficients for transform bands Nos. 0, 1, . . . , K in the frequency domain, a reduced digital filter having coefficients for combined transform bands, i.e. subsets of the transformed bands, Nos. 0, 1, . . . , L, is formed and only these coefficients are stored. When the actual filtering in the digital filter is to be performed, an actual digital filter is obtained by expanding the coefficients of the reduced digital filter according to a mapping table and then used instead of the original digital filter.
Inventors:
Tareb, Anise
Carlson, Ellender
Eric Norber
Harvard, Poblos
Carlson, Ellender
Eric Norber
Harvard, Poblos
Application Number:
JP2009502720A
Publication Date:
July 03, 2013
Filing Date:
March 28, 2007
Export Citation:
Assignee:
Telefon Akti Bora Get Elm Ericson (Pubble)
International Classes:
H03H17/02; G10L19/00; H04S3/00
Domestic Patent References:
| JP62129895A |
Attorney, Agent or Firm:
Yasunori Otsuka
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura
Osamu Shimoyama
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura
Osamu Shimoyama