Title:
フィルタ装置及び方法
Document Type and Number:
Japanese Patent JP4343529
Kind Code:
B2
Abstract:
A filtering method is proposed wherein first several filtering steps (I-III, IV-VI) are made. Each step (I-III,IV-VI) includes: generating a filtered signal (I,IV), rounding this filtered signal (II,V) to a certain accuracy and combining (III,VI) the rounded signal with the input signal, whereby a filter error is obtained. The filtered signals are combined (VII) to a first filtered signal that is rounded (VIII) and combined (IX) with the input signal, whereby a coded signal is obtained. This allows to adapt the rounding step (II,V) and the combining step (III,VI) in each filtering step to specific filter design. Thereby limit cycles are reduced, the first filtered signal is available for further processes and the rounding can be inverted in the reverse process. Further a filter method for the reverse process, filter devices (1,10) able to perform these methods and devices (20,30,40,50,60) containing such devices are provided.
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Inventors:
Bull Ekers Alphonse AM
Rheinberg Adrien Jay
Rheinberg Adrien Jay
Application Number:
JP2002548867A
Publication Date:
October 14, 2009
Filing Date:
November 22, 2001
Export Citation:
Assignee:
IPG Electronics 503 Limited
International Classes:
H03H17/04; G10L19/04; G11B20/00; H03H1/00; H03H17/02; H03M7/36
Foreign References:
| WO2000041313A1 |
Attorney, Agent or Firm:
Kenji Sugimura
British tribute
British tribute