Method for generating harmonics using fourier transform and apparatus thereof, method for generating harmonics by down-sampling and apparatus thereof and method for enhancing sound and apparatus there

A technology for generating devices and overtones, which is applied to overtone generation and devices, and can solve problems such as high complexity and difficulty in implementation.
CN1932970AInactive Publication Date: 2007-03-21INSPUR LG DIGITAL MOBILE COMMUNICATIONS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
INSPUR LG DIGITAL MOBILE COMMUNICATIONS CO LTD
Publication Date
2007-03-21
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for generating overtone, an apparatus, and a method for enhancing sound and an apparatus, particularly, the invention enhances a low sound by using a Fourier transform to replace a multi-band-pass filter with a high complexity and a high precision which is difficult to be realized, and enhances a high sound by reducing a sampling rate and a frame repetition number. The invention provides an overtone generating apparatus using Fourier transforms, which includes a Fourier transform unit for performing a Fourier transform on an inputted sound signal and outputting a Fourier coefficient value of an arbitrary frequency component of the sound signal; a sine wave generating unit for generating a sine wave signal whose size and frequency are corresponding to the Fourier coefficient value; and an overtone generating unit for generating an overtone signal of the sine wave signal.
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Description

technical field

[0001] The present invention relates to an overtone generation method and device using Fourier transform, a method and device for overtone generation by reducing the sampling rate, and a sound enhancement method and device. A high-speed multi-passband filter enhances the bass and enhances the treble through downsampling and frame repetition. Background technique

[0002] With the rapid development of signal processing technology and related devices, various signal processing methods have been developed in pursuit of more three-dimensional sound. In particular, in order to provide users with realistic sounds close to the original sound, various low-frequency and high-frequency sound enhancement methods have recently been provided.

[0003] In sound playback systems such as low-priced headphones, the sound signal in the low frequency band is significantly attenuated compared with the sound signal in the mid-high frequency band. In order to solve this problem,...

Claims

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