Detection and restoration of clipping distortion in audio signal
Yonghong Yan · Shengxue jishu · 2009
Clipping distortion in audio signal is an important part of signal restoration, whose aim is to make the audio integrative in order to do further research on it. This paper presents a method for detection and restoration of clipping distortions in audio signals. It begins with a description of the method for the detection of clipping distortions based on the audio’s amplitude peak value, and creatively uses a least square AR (LSAR) repairing method based on the AR modeling and the theory of the minimum mean square error for the restoration of the clipping distortions. Subsequently, the results obtained by this method are shown, and the statistical results acquired by the method effecting on the clipping distortions test collection-the signal to noise ratio (SNR) and the value of the Perceptual evaluation of speech quality (PESQ) are presented. Obviously, the method is efficient when it processes on the clipping distortions with different sample rates, achieves the demands of audio restoration, and improves the audio quality.