Paper Info
Title
Application-Layer Redundancy for the EVS Codec.
Abstract
In this paper, we study the performance of the 3GPP EVS codec when this codec is used in conjunction with 100% application-layer redundancy. The objective of this work is to investigate potential performance gains for Voice over LTE (VoLTE) in bad coverage scenarios. Voice quality for the EVS codec operated in the 9.6-24.4 kbit/s bit range in super-wideband (SWB) is evaluated at different packet loss rates (PLR), using objective and subjective methods (ITU-T P.863 and P.800 ACR). Results show that EVS at 9.6 kbit/s with 100% application-layer redundancy has significantly higher packet loss resilience in degraded channel conditions (>= 3% PLR), for an overall bit rate (around 2x9.6 kbit/s) compatible with VoLTE (assuming a VoLTE bearer configured to a maximum rate of 24.4 kbit/s). We also discuss the relative merit of the partial redundancy mode in the EVS codec at 13.2 kbit/s, known as the channel-aware mode (CAM), and possible RTP/RTCP signaling methods to trigger the use of application-layer redundancy.
Year
DOI
Venue
2018
10.23919/EUSIPCO.2018.8553183
European Signal Processing Conference
Field
DocType
ISSN
Forward error correction,Application layer,RTP Control Protocol,Computer science,Communication channel,Packet loss,Redundancy (engineering),Computer hardware,Codec,Encoding (memory)
Conference
2076-1465
Citations 
PageRank 
References 
0
0.34
0
Authors
5
Name
Order
Citations
PageRank
Najmeddine Majed100.34
stephane ragot2304.98
Lætitia Gros300.68
Xavier Lagrange424739.58
Alberto Blanc5605.03