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Coefficient-setting device of digital electric filter and method thereof

A technology of filter coefficient and digital filter, applied in the field of digital filter coefficient setting device, can solve the problem that coefficient calculation unit 914 cannot immediately calculate etc.

Inactive Publication Date: 2003-09-03
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the second conventional digital filter setting means 910 suffers from another drawback that the second conventional digital filter setting means 910 may respond to a Specific filter coefficient element delay setting digital filter equipped in DSP906

Method used

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  • Coefficient-setting device of digital electric filter and method thereof
  • Coefficient-setting device of digital electric filter and method thereof
  • Coefficient-setting device of digital electric filter and method thereof

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Embodiment Construction

[0031] Throughout the following detailed description, like reference numerals and numerals refer to like elements throughout the drawings.

[0032] A first preferred embodiment of the digital filter coefficient setting device will now be described in detail with reference to the accompanying drawings.

[0033] Referring now to the accompanying drawings, in particular figure 1 with 2 , shows the first preferred embodiment of the digital filter coefficient setting device 100 according to the present invention. figure 1 The shown digital filter coefficient setting device 100 includes a coefficient acquisition unit 102, a coefficient transmission unit 103, a processor 104 including a not-shown digital filter, a coefficient calculation unit 106, a coefficient storage unit 108, a A coefficient selection unit 109 , a switch unit 110 and a parameter input unit 111 .

[0034] A digital filter included in processor 104 may be used to filter digital signals according to digital filter...

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Abstract

Herein disclosed is a digital filter coefficient setting apparatus which can search and select a specified filter coefficient element corresponding to a specified coefficient parameter inputted by a parameter inputting unit from among the plurality of filter coefficient elements stored in a coefficient storing unit and calculate a specified filter coefficient element on the basis of the specified coefficient parameter when the specified filter coefficient element is not selected from among the plurality of filter coefficient elements stored in the coefficient storing unit, thereby enabling to efficiently set a digital filter in response to a specified filter coefficient element corresponding to any possible specified coefficient parameter inputted therein, as well as to reduce a time required for obtaining the specified filter coefficient element.

Description

technical field [0001] The present invention relates to a digital filter coefficient setting device and a digital filter coefficient setting method, more particularly, to a digital filter coefficient setting device and a digital filter coefficient setting device for setting a digital filter in response to specific filter coefficient elements Digital filter coefficient setting method. Background technique [0002] A digital filter is designed to filter a digitally encoded input signal. The digital filter has properties such as, for example, a passband, i.e. a range of frequencies through which the power of the input signal passes to filter the output with approximately unity gain, and a stopband, i.e. a range of frequencies over which The frequency range in which the power of the input signal is attenuated to a level that can be considered practically absent in the output signal, and a cutoff frequency, that is, the frequency at which the power of the output signal is half t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H17/02
CPCH03H17/0294
Inventor 阿部良二
Owner PANASONIC CORP