Method and device for displaying audio signal frequency spectrum

Abstract

The invention relates to the field of frequency data processing, in particular to a method and a device for displaying a frequency signal spectral, which is used for resolving the problems existing in the prior art that in the prior portable multimedia player, the process for displaying the energy of the frequency separated flow needs to process plenty of calculations, thereby reducing the efficiency of displaying and adding the burden of the portable multimedia player. The embodiment method of the invention comprises: sampling the frequency sample which needs to be processed; transferring the frequency sample which needs to be processed for getting the corresponding effective frequency separated flow; choosing the effective frequency separated flow which needs to be processed from the effective frequency separated flow; ensuring the energy of the effective frequency separated flow; adjusting the energy of the effective frequency separated flow according to a set adjusting form; displaying the energy of the effective frequency separated flow after adjusting. The embodiment of the invention is adopted to reduce the quantity of calculation during the process of displaying the energy of the frequency separated flow, thus saving storage space.

Description

technical field [0001] The invention relates to the field of audio data processing, in particular to a method and device for displaying audio frequency spectrum. Background technique [0002] Spectrum display technology refers to displaying its spectrum distribution while playing audio files. Users can intuitively see which frequency components, the size of each component, and the speed of change in the music being played. The purpose of this is to enhance the user's intuitive experience and obtain a better user experience, see figure 1 . [0003] The audio file plays a series of frequency points of the time-domain signal. Fourier transform these frequency points to obtain the corresponding spectrum component diagram. Real-time display requires real-time calculation and refreshing of the screen. [0004] The steps of the current spectrum display technique include: [0005] 1) Use Fast Fourier Transform (FFT) to calculate the spectrum of the sampled signal and obtain the f...

AI Technical Summary

Problems solved by technology

[0010] Embodiments of the present invention provide a method and device for displaying the frequency spectrum of an audio signal to solve the problem in the prior art that in a portable multimedia player, the process of displaying the energy of frequency components needs to deal with a large number of calculations, thereby reducing the display efficiency , and increases the burden on portable multimedia players

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