Details

Autor(en) / Beteiligte

• Schafer, M.
• Vary, P.

Titel

Hierarchical multi-channel audio coding based on time-domain linear prediction

Ist Teil von

• 2012 Proceedings of the 20th European Signal Processing Conference (EUSIPCO), 2012, p.2148-2152

Ort / Verlag

IEEE

Erscheinungsjahr

2012

Link zum Volltext

• IEEE_Xplore

Quelle

IEEE Xplore Digital Library

Beschreibungen/Notizen

• A novel hierarchical multi-channel coding scheme is proposed which exhibits a significant decrease in decoding complexity compared to earlier proposals. The new coding scheme is based on a single channel down mixing process followed by predictions of the multichannel input signals. Symmetries in the prediction filter coefficients and the prediction errors allow for a reduced number of channels which need to be transmitted. A detailed evaluation of the achievable prediction gain and the impact of quantization on the perceived quality leads to insights into the appropriate choice of system parameters. Besides the attractive feature of being usable as a hierarchic extension to existing single channel communication systems and its very low additional algorithmic delay, the transmission quality of the proposed design also scales very well with the available data rate.