Method for improving signal display quality under a condition of low sampling rate

A signal display, low sampling rate technology, applied in the field of signal processing, can solve the problems of poor signal display and printing quality, and achieve the effect of simple implementation, mature principle, and no loss.

Inactive Publication Date: 2009-03-04
SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for improving signal display quality under the condition of low sampling rate, which can solve the problem of poor signal display and printing quality under the condition of high signal frequency and insufficient sampling points

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  • Method for improving signal display quality under a condition of low sampling rate
  • Method for improving signal display quality under a condition of low sampling rate
  • Method for improving signal display quality under a condition of low sampling rate

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Embodiment Construction

[0035] Below according to accompanying drawing and embodiment, the present invention is described in further detail:

[0036] The invention provides a method for improving the quality of signal display under the condition of low sampling rate. subsampling to improve display and printing.

[0037] like figure 1 As shown, the present invention mainly comprises the following steps:

[0038] A. Sampling is performed under the condition that the frequency of the original signal is high and the sampling rate of the digital-analog A / D is not high enough to obtain original sampling data, and the sampling rate meets the requirements of the Nyquist frequency. The Nyquist frequency, that is, the sampling rate must be at least twice the bandwidth of the signal being sampled to ensure that aliasing of the signal samples does not occur.

[0039] B. According to the set increment sampling multiple q, interpolate a zero value to the original sampling data to obtain an original data sequenc...

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Abstract

The invention relates to a method for improving signal display quality under the condition of low sampling rate, which comprises the following steps: digital analogy sampling is carried out to an original signal so as to obtain original sampling data; interpolating zero value supplementation is carried out to the original sampling data according to given sampling increasing times so as to obtain a data sequence after zero supplementation; a low-pass filter is designed, filtration is carried out to the data sequence after the zero supplementation by adopting the convolution filtering algorithm so as to obtain a correction signal after sampling increasing; sampling decreasing processing is carried out to the correction signal after the sampling increasing so as to obtain the correction signal. The method of the invention ensures that the available information of the signal can not be lost, thus greatly improving the display and printing effects of the signal when the analog signal frequency is comparatively high and the sampling rate is comparatively low.

Description

technical field [0001] The invention relates to a signal processing technology, in particular to a method for improving signal display or printing quality when the analog signal frequency is high and the digital-analog signal sampling rate is low. Background technique [0002] The extraction of the electrical signal is obtained by A / D sampling of the digital-to-analog signal at a certain frequency, which is equivalent to a sampling of the original signal, and the sampling frequency must meet the Nyquist frequency, that is, the Nyquist frequency of the sampling must be greater than The highest frequency of the signal, so as to ensure the validity of the sampling. However, in practical applications, even if the signal sampling meets the Nyquist frequency, when the frequency of the signal is high, the peak information will still be lost due to the asynchrony between the signal period and the sampling period. Printing is not good. [0003] This kind of problem can be solved by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K5/13H03M1/10G06F17/10A61B5/0432
Inventor 于辉靳波张波叶文宇
Owner SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD
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