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Towards an optimization-oriented approach for audio coding, this paper presents improved rate-distortion and perceptual strategies for bit allocation. The algorithm is based on best basis wavelet-packet trees and fractal dimension calculation. Transparent coding of high quality audio, signals sampled at 44.1 KHz using 16 bits PCM, is effectively achieved at low bit rates. Real time working of the...
The paper is focused on the prediction stage for lossless audio coding. We rely on the piecewise autoregressive model to design a compressor dubbed PAR for which the complexity of the decoder is low such that to be easily implemented on economic devices. The performances of the new coder are evaluated for two data sets of monaural audio signals sampled at 44.1 KHz and recorded with 16 bits/sample...
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