Low complexity channel error mitigation for distributed speech recognition over wireless channels
Victoria Sánchez, Antonio M. Peinado, José L. Pérez-Córdoba · 2004
Distributed speech recognition (DSR) has been recently proposed as an efficient way of translating automatic speech recognition technologies to mobile and IP network application. In this paper we propose a channel error mitigation technique with a low computational complexity that improves the mitigation technique proposed in the ETSI standard for DSR (ETSI-ES-201-108 v1.12) for bad channel conditions. We also study the influence of the vector quantization index assignment on the proposed mitigation technique and design a new index assignment that gets some improvement on the proposed technique.