Realization of implementing sound mixing technology in Digital Smart Home Terminal

To enable multichannel audio streaming play simultaneously with one set of audio device in Digital Smart Home Terminal, multichannel data resampling and sound mixing should be realized. This paper introduces the resampling and mixing filter components based on the frame of Mediastreamer2. Sinc function interpolation method is used to realize implementing sound mixing technique in digital smart home terminal and average algorithm is used in mixing data. A test on S3C6410 is given to this mixing audio technology, and the result shows that it is feasible, with an acceptable range of distortion error.