Title :
An audio enhancement method in compressed domain
Author :
Feng Bao ; Feng Deng ; Chang-chun Bao ; Mao-shen Jia
Author_Institution :
Sch. of Electron. Inf. & Control Eng., Beijing Univ. of Technol., Beijing, China
Abstract :
An audio enhancement method based on AAC bitstream is proposed in this paper. First, the improved weighted recursive averaging (IWRA) algorithm is introduced to estimate the noise. Second, the β-order minimum mean-square error (β-MMSE) enhancement approach is employed to obtain the spectral amplitude of audio signals. Finally, the IWRA method and β-MMSE method are applied into MPEG AAC codec for suppressing the noises included in AAC bitstream. The objective and subjective listening test results show that the proposed method yields good noise reduction results, the performance is better than reference methods.
Keywords :
audio coding; audio signal processing; audio streaming; interference suppression; least mean squares methods; signal denoising; spectral analysis; ß-MMSE method; ß-order minimum mean square error; AAC bitstream; IWRA method; MPEG AAC codec; audio enhancement method; audio signal; compressed domain; improved weighted recursive averaging; noise estimation; noise suppression; spectral amplitude; β-MMSE statistical model; AAC encoder; audio enhancement; noise estimation;
Conference_Titel :
Signal Processing (ICSP), 2012 IEEE 11th International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4673-2196-9
DOI :
10.1109/ICoSP.2012.6491528
