Embedded high-quality multichannel audio coding

An embedded high-quality multichannel audio coding algorithm is proposed in this research. The Karhunen-Loeve Transform (E(LT) is applied to multichannel audio signals in tire preprocessing stage to remove inter-channel redundancy. Then, after processing of several audio coding blocks, transformed coefficients are layered quantized and tire 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 heterogeneous networks. Experimental results show that, compared with the MPEG Advanced audio Coding (AAC) algorithm, the proposed algorithm achieves a better performance with both the objective hi Nn (Mask-to-Noise-Rat io) measurement and the subjective listening test at several different bit rates.