In this paper we present a concept for robust speech transmission on packet based cellular networks with packet losses. We transmit selected side information of low bit rate to assist the receiver's packet loss concealment routine in reconstructing lost frames of standard ACELP based speech codecs, e.g., AMR Wideband. The side information indicates which particular estimation technique the receiver should use to restore speech parameters of the respective frame. Further improvement can be achieved by additionally transmitting the coarsely quantized estimation error. The achievable quality gains are evaluated by parameter SNR, spectral distortion, and Wideband PESQ measures.
This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.
The following notice applies to all IEEE publications:
© IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.