A simple implementation for 3D virtual surround sound effect and its application in multichannel audio coding

This paper proposes a simple implementation of audio virtual surround sound effect and a novel scheme for multichannel coding using virtual prediction technique. We used the data of Head Related Transfer Functions (HRTFs) to produce virtual surround sound channels, and mixed them into original stereo channels. The resultant effects were passed the subjective evaluation and implemented real-time on a Motorola DSP. Using the virtual prediction technique, we can remove redundancies between inter-channels in multichannel coding. Therefore, a new coding scheme and method thereof are given. It is helpful to decrease the bit-rates or enhance the quality of multichannel audio coding. The feasibility and result are discussed in the end of this paper.