A new scalable audio coding scheme is introduced in this paper. Its core idea is to create one additional scalability dimension during the encoding process for the purpose of generating a plural of scalable sub-bitstr...
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ISBN:
(纸本)9781479903566
A new scalable audio coding scheme is introduced in this paper. Its core idea is to create one additional scalability dimension during the encoding process for the purpose of generating a plural of scalable sub-bitstreams. Based on the multiple sub-streams, a smart truncator is designed that can truncate these sub-bitstreams with optimal rate-distortion (R-D) trade-off. Benefited from the flexible R-D trade-off, the proposed new scheme could, with in a wide bit rate range, out perform those traditional scalable coding schemes, which usually provides a fixed R-D relationship designed at a specified bit rate. To verify the performance, the proposed scheme is further implemented based on a priorart scalable audio codec. Significant quality improvement is observed from the new codec via a series of subjective listening tests.
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