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Proceedings Paper

High quality scalable audio codec
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Paper Abstract

The MPEG-4 BSAC (Bit Sliced Arithmetic Coding) is a fine-grain scalable codec with layered structure which consists of a single base-layer and several enhancement layers. The scalable functionality allows us to decode the subsets of a full bitstream and to deliver audio contents adaptively under conditions of heterogeneous network and devices, and user interaction. This bitrate scalability can be provided at the cost of high frequency components. It means that the decoded output of BSAC sounds muffled as the transmitted layers become less and less due to deprived conditions of network and devices. The goal of the proposed technology is to compensate the missing high frequency components, while maintaining the fine grain scalability of BSAC. This paper describes the integration of SBR (Spectral Bandwidth Replication) tool to existing MPEG-4 BSAC. Listening test results show that the sound quality of BSAC is improved when the full bitstream is truncated for lower bitrates, and this quality is comparable to that of BSAC using SBR tool without truncation at the same bitrate.

Paper Details

Date Published: 10 September 2007
PDF: 11 pages
Proc. SPIE 6777, Multimedia Systems and Applications X, 67770E (10 September 2007); doi: 10.1117/12.735802
Show Author Affiliations
Miyoung Kim, Samsung Advanced Institute of Technology (South Korea)
Eunmi Oh, Samsung Advanced Institute of Technology (South Korea)
JungHoe Kim, Samsung Advanced Institute of Technology (South Korea)

Published in SPIE Proceedings Vol. 6777:
Multimedia Systems and Applications X
Susanto Rahardja; JongWon Kim; Jiebo Luo, Editor(s)

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