2016/02/17 by Jean-Marc Valin, Valin, Jean-Marc, Timothy B. Terriberry +3 · 1 citation
Computer Science · Engineering · #Advanced Adaptive Filtering Techniques #Advanced Data Compression Techniques #FOS: Computer and information sciences #Multimedia (cs.MM) #Sound (cs.SD) #Speech and Audio Processing
paper · pdf · doi:10.48550/arxiv.1602.05311
openalex publication_date 2016/02/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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.