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arXiv · 1602.05311

A Full-Bandwidth Audio Codec With Low Complexity And Very Low Delay

Jean-Marc Valin·Timothy B. Terriberry·Gregory Maxwell
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Abstract

We propose an audio codec that addresses the low-delay requirements of some applications such as network music performance. The codec is based on the modified discrete cosine transform (MDCT) with very short frames and uses gain-shape quantization to preserve the spectral envelope. The short frame sizes required for low delay typically hinder the performance of transform codecs. However, at 96 kbit/s and with only 4 ms algorithmic delay, the proposed codec out-performs the ULD codec operating at the same rate. The total complexity of the codec is small, at only 17 WMOPS for real-time operation at 48 kHz.

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Jean-Marc Valin, Timothy B. Terriberry, Gregory Maxwell. 2016-02-17. A Full-Bandwidth Audio Codec With Low Complexity And Very Low Delay. https://arxiv.org/abs/1602.05311

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