9th Annual Conference of the International Speech Communication Association

Brisbane, Australia
September 22-26, 2008

Decision Tree Based Frame Mode Selection for AMR-WB+

Jong Kyu Kim, Seung Seop Park, Chang Woo Han, Nam Soo Kim

Seoul National University, Korea

In this paper, we propose a decision tree based coding mode selection method for the AMR-WB+ audio coder. In order to obtain improved performance with reduced computation, decision tree classifier is adopted with the closed loop mode selection results as the target classification labels. To secure the practical feasibility of this method, the size of the decision tree is controlled by pruning. Through an evaluation on a database covering both speech and music materials, the proposed method is found to increase the mode selection accuracy compared with the open loop mode selection module in the AMR-WB+.

Full Paper

Bibliographic reference.  Kim, Jong Kyu / Park, Seung Seop / Han, Chang Woo / Kim, Nam Soo (2008): "Decision tree based frame mode selection for AMR-WB+", In INTERSPEECH-2008, 695-698.