Harmonic analysis method and apparatus, and method and apparatus for determining clutter in harmonic wave

A technique of harmonic analysis and clutter, applied in the field of signal processing

Active Publication Date: 2014-12-31
HUAWEI TECH CO LTD
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Problems solved by technology

[0006] The present invention proposes a harmonic analysis method and device and a method and device for determining inter-harmonic clutter, aiming to solve the problem of how to obtain a clear and accurate harmonic spectrum

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  • Harmonic analysis method and apparatus, and method and apparatus for determining clutter in harmonic wave

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Embodiment Construction

[0054] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0055] The following will combine figure 1 , to describe a method for harmonic analysis according to an embodiment of the present invention, including the following steps.

[0056] 11. Perform time-frequency conversion on the input time-domain signal to obtain a frequency spectrum of the time-domain signal in the frequency domain.

[0057] For example, Fast Fourier Transform (FFT, Fast Fourier Transform) and Discrete Cosine Transform (DCT, Discrete Cosine...

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Abstract

The embodiment of the invention relates to a harmonic analysis method and apparatus, and a method and apparatus for determining clutter in harmonic wave. The harmonic analysis method comprises: carrying out time frequency conversion on an inputted time domain signal so as to obtain a frequency spectrum of the time domain signal at a frequency domain; carrying out filtering processing on the frequency spectrum so as to determine a target frequency spectrum; carrying out elimination processing on the clutter in the harmonic wave of the target frequency spectrum so as to determine the structure of the harmonic wave of the target frequency spectrum; and on the basis of the structure of the harmonic wave of the target frequency spectrum, carrying out a harmonic analysis on the harmonic wave. According to the embodiment of the invention, the target frequency spectrum of the harmonic analysis is determined by filtering and the clutter interference can be effectively eliminated, thereby obtaining a clear and accurate harmonic frequency spectrum and thus carrying out the harmonic analysis conveniently.

Description

technical field [0001] The present invention relates to signal processing and, in particular, to methods and apparatus for harmonic analysis and methods and apparatus for determining interharmonic clutter. Background technique [0002] Harmonic analysis is a basic means of signal processing and analysis, and it is widely used in signal identification, classification, coding, enhancement and other fields. Harmonic analysis can cover a variety of different analysis purposes, such as calculating the number of harmonics, calculating the fundamental frequency of harmonics, calculating the strength of harmonics, calculating intra-frame / inter-frame correlation of harmonics, and calculating harmonic-to-noise ratio etc. Harmonic analysis can be performed based on time domain signals or frequency domain signals. Generally speaking, harmonic analysis is most commonly performed on frequency-domain signals, and the effect is also better. [0003] In the existing audio coding algorithm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R23/165
CPCG01R23/165G10L21/0232
Inventor 王喆
Owner HUAWEI TECH CO LTD
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