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Audio processing method and device thereof

An audio processing and spectrum technology, applied in the multimedia field, can solve the problems of unsatisfactory effect of removing human voice, unsatisfactory effect, and destroying the stereoscopic effect of songs.

Active Publication Date: 2010-11-24
SPREADTRUM COMM (SHANGHAI) CO LTD
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Problems solved by technology

[0006] However, the inventors of the present invention have found that in the prior art, although the method of stereo enhancement is relatively simple in implementation, the effect is not satisfactory, and the improvement of stereoscopic effect depends more on the improvement of volume; the method of removing human voice is completely It destroys the three-dimensionality of the song, and the effect of removing the human voice is not satisfactory

Method used

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  • Audio processing method and device thereof
  • Audio processing method and device thereof

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no. 1 approach

[0072] Of course, in practical applications, B can also be obtained with less or even a simple calculation instruction sum (such as the instruction CLZ of the ARM processor), without the need to use the complex function calculation expressed by formula (14). Similarly, for E' diff The minimum number of binary digits B' consumed by the value of diff can also be obtained, where E’ diff is the total difference energy of the spectrum signal, the specific calculation method can refer to the first embodiment, namely:

[0073] B' diff =int[log 2 (E' diff )+0.5] (15)

[0074] In this embodiment, the normalization factor has p 1 Bit precision (that is, the number of bits that can be used after the decimal point for the value of the normalization factor is p 1 ,p 1 can be preset according to needs), then the normalization factor λ can be obtained by the following formula:

[0075] λ = ( 2 p ...

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Abstract

The invention relates to the multimedia technology, and discloses an audio processing method and a device thereof. The method comprises the following steps of: acquiring a normalized energy diversity ratio of spectrums of left and right sound channels by performing diversity analysis on the spectrums of the left and right sound channels, obtaining an enhanced filter coefficient according to the normalized energy diversity ratio and a sequence for shaping, and performing enhanced filtration on the spectrum of a stereo signal according to the obtained enhanced filter coefficient. Because the enhanced filtration is finished in a frequency domain by using the enhanced filter before a frequency domain signal is converted into au audio signal through a synthesis filter, the audio processing effect can be greatly improved so that the finally output audio has better stereo enhancing effect or voice removing effect.

Description

technical field [0001] The invention relates to multimedia technology, in particular to audio processing technology in multimedia technology. Background technique [0002] The application of multimedia technology is the fastest growing and most active technology in the field of information technology today, and it is the focus of the development and competition of the new generation of electronic technology. Multimedia technology integrates multiple functions such as computer, sound, text, image, animation, video and communication. Sound is an important medium for human beings to spread information and communicate with each other. In multimedia technology, the digital processing of audio signal is its main component. [0003] Since all kinds of media information in multimedia technology are processed by digital signals, the most important problem in the processing of audio signals in multimedia technology is to digitize analog audio signals. It mainly includes the analog-...

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Application Information

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IPC IPC(8): G10L19/00G10L19/02G10L21/02H04S7/00G10L19/008
Inventor 吴晟林福辉张本好李昙徐晶明
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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