| Paper: | AE-P3.4 | ||
| Session: | Audio Coding, Network Audio and Multimedia Applications | ||
| Time: | Thursday, May 18, 10:00 - 12:00 | ||
| Presentation: | Poster | ||
| Topic: | Audio and Electroacoustics: Broadband and Perceptual Coding | ||
| Title: | Cascaded RLS-LMS Prediction in MPEG-4 Lossless Audio Coding | ||
| Authors: | Haibin Huang, Susanto Rahardja, Xiao Lin, Rongshan Yu, Institute for Infocomm Research, Singapore; Pasi Franti, University of Joensuu, Finland | ||
| Abstract: | A new MPEG-4 standard for lossless audio coding is going to be published in 2006. This coming international standard consists of two parts: the transform-domain Scalable to Lossless coding (SLS), and the time-domain Audio Lossless coding (ALS). In ALS, linear prediction is used to compress the dynamic ranges of the input audio signal. The prediction residual is coded by an entropy coder with either Rice code or arithmetic code. There are two prediction modes in ALS: linear prediction coding (LPC) and cascaded RLS-LMS. As the developer of the RLS-LMS prediction, we present this technology in this paper. In RLS-LMS prediction, the input audio samples go through the cascaded DPCM, RLS, and LMS predictors, whose output predictions are linearly combined to generate a prediction for the current input sample. Through MPEG testings, it has been found that ALS with RLS-LMS prediction provides the best lossless compression ratio compared with SLS, ALS with LPC, and several non-MPEG codecs. | ||
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