Embedded high-quality multichannel audio coding
Dai Tracy Yang, Hongmei Ai, Christos Kyriakakis, C.‐C. Jay Kuo · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2001
An embedded high-quality multichannel audio coding algorithm is proposed in this research. The Karhunen-Loeve Transform is applied to multichannel audio signals in the pre- processing stage to remove inter-channel redundancy. Then, after processing of several audio coding blocks, transformed coefficients are layered quantized and the bit stream is ordered according to their importance. The multichannel audio bit stream generated by the proposed algorithm has a fully progressive property, which is highly desirable for audio multicast applications in heterogenous networks. Experimental results show that, compared with the MPEG Advanced Audio Coding algorithm, the proposed algorithm achieves a better performance with both the object Mask-to- Noise-Ratio measurement and the subjective listening test at several different bit rates.