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Interpolating function generating apparatus and method, digital-analog converter, data interpolator, program, and reocrd medium

A digital data and function generation technology, applied in the direction of digital-to-analog converters, digital function generators, analog-to-analog conversion, etc., can solve problems such as the inability to obtain interpolation values, and achieve the effect of miniaturization of circuit scale and reduction of processing load

Inactive Publication Date: 2003-11-19
NEURO SOLUTION CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, there is also the problem that the correct interpolation value cannot be obtained because the obtained interpolation value contains truncation error

Method used

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  • Interpolating function generating apparatus and method, digital-analog converter, data interpolator, program, and reocrd medium
  • Interpolating function generating apparatus and method, digital-analog converter, data interpolator, program, and reocrd medium
  • Interpolating function generating apparatus and method, digital-analog converter, data interpolator, program, and reocrd medium

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Embodiment Construction

[0037] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0038] In this embodiment, by performing the following steps on the input discrete digital data Figure 6 The processing of the digital basic waveform shown in Fig. Figure 7 The interpolation function shown in the solid line C.

[0039] Should Figure 7 The function shown by the solid line C is the sampling function, which can be differentiated once in the whole domain and converges to 0 at the finite sampling position (that is to say, the function value has a finite value other than 0 in the local domain, and in the Other fields are 0) function. Therefore, instead of figure 1 The existing sinc function shown, by using Figure 7 The sampling function is superimposed according to each discrete data, so a function that can be differentiated once can be used to interpolate between the discrete data.

[0040] If this technique is used, continuous interpolation valu...

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Abstract

A digital input is 8-fold oversampled, delay circuits 11-1 to 11-4 and multipliers / adders 12 to 15 perform a convolution arithmetic while multipliers / adders 4 to 10 process the oversampling data into predetermined digital basic waveforms, and continuous interpolation values can be obtained, thereby requiring no low pass filter which causes deterioration of phase characteristics, and suppressing an interpolation abortion error by setting finite interpolating functions. Furthermore, by obtaining a part of oversampling data as input data by using an AND gate 2, a subsequent process using the digital basic waveform and the convolution arithmetic can be performed in a very simple process.

Description

technical field [0001] The invention relates to an interpolation function generation device and method, a digital-to-analog conversion device, a data interpolation device, a program and a storage medium. Specifically, it relates to an apparatus and method for converting discrete digital data into continuous analog signals by interpolation. Background technique [0002] In digital audio devices such as CD (Compact Disc) players or DVD (Digital Video Disc) playback equipment, in order to obtain continuous analog sound signals from discrete digital sound data, over sampling (over sampling) technology is used. Digital-to-analog converter (D / A converter). In such a D / A converter, in order to increase the sampling frequency analogously by interpolating discretely input digital data, data interpolation using a digital filter is generally performed. [0003] Generally, data interpolation by a digital filter in a D / A converter is performed by a convolution operation using a samplin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M1/66G06F1/02H03H17/00H03H17/06H03M1/00H03M3/04
CPCG06F1/02H03H17/0657H03M3/508H03M1/66
Inventor 小柳裕喜生
Owner NEURO SOLUTION CORP