Real-Time Subband-ADPCM Low-Delay Audio Coding Approach

Keiler F. Real-Time Subband-ADPCM Low-Delay Audio Coding Approach. In: AES Convention 120. Audio Engineering Society; 2006. Paper 6748. Available from: https://aes.org/publications/elibrary-page/?id=13552

@inproceedings{Keiler2006_13552,
  author = {Keiler, Florian},
  title = {{Real-Time Subband-ADPCM Low-Delay Audio Coding Approach}},
  booktitle = {AES Convention 120},
  note = {Paper 6748},
  year = {2006},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=13552}
}

TY  - CPAPER
TI  - Real-Time Subband-ADPCM Low-Delay Audio Coding Approach
AU  - Keiler, Florian
T2  - AES Convention 120
M1  - Paper 6748
PY  - 2006
DA  - 2006/05/06
UR  - https://aes.org/publications/elibrary-page/?id=13552
PB  - Audio Engineering Society
LA  - en
AB  - A low-delay audio codec using the ADPCM structure (ADPCM = adaptive differential pulse code modulation) in subbands is presented. With the use of 8 subbands a coarse spectral shaping of the coding noise is obtained and the signal delay is approximately 3 ms. The targeted bit rate is in the range from 128 to 176 kbit/s per channel for near transparent audio quality. The codec uses a cosine-modulated filterbank and backward adaptive calculation of the prediction coefficients and quantization scaling factors. The computations are optimized for a real-time implementation on a fixed-point DSP with an almost constant workload over time. A comparison with the Philips Subband Coder (SBC) and the Fraunhofer Ultra Low Delay Codec (ULD) is performed.
ER  -