DocumentCode :
2970660
Title :
QoS-sensitive transport of real-time MPEG video using adaptive forward error correction
Author :
Kihong Park ; Wang, Wei
Author_Institution :
Dept. of Comput. Sci., Purdue Univ., West Lafayette, IN, USA
Volume :
2
fYear :
1999
fDate :
36342
Firstpage :
426
Abstract :
This paper presents an adaptive end-to-end protocol for quality of service (QoS)-sensitive transport of real-time MPEG video using packet-level forward error correction in dynamic networks. The objective is to facilitate a user-specified QoS end-to-end, i.e., without special network support-for real-time MPEG video traffic whose timing constraints rule out the use of retransmission-based congestion control and QoS provisioning schemes. In previous work, we proposed an adaptive packet-level FEC protocol called AFEC and analyzed its properties with respect to optimality and stability. The control problem is nontrivial due to the fact that increased redundancy, beyond a certain point, can “backfire” resulting in self-induced congestion which impedes the timely recovery of information (e.g., MPEG video frames) at the receiver. We extend the previous work by implementing and customizing AFEC to the transport of real-time MPEG video, realizing the system as a transport and application layer protocol called MAFEC running end-to-end on UNIX workstations, and measuring its performance over controlled network environments. We show that MAFEC is able to effectively hide potentially adverse network effects such as packet drops and delays stemming from traffic burstiness and nonstationary structural changes using adaptive redundancy control, exporting a constant-QoS service commensurate with user-specified, desired QoS
Keywords :
code standards; forward error correction; multimedia communication; performance evaluation; quality of service; real-time systems; telecommunication standards; telecommunication traffic; transport protocols; video coding; AFEC; MAFEC; UNIX workstations; adaptive end-to-end protocol; adaptive forward error correction; adaptive redundancy control; application layer protocol; delays; dynamic networks; packet drops; packet-level FEC protocol; performance; quality of service; real-time MPEG video; redundancy; retransmission-based congestion control; timing constraints; traffic burstiness; transport protocol; user-specified QoS; Communication system traffic control; Forward error correction; Impedance; Quality of service; Real time systems; Redundancy; Stability analysis; Timing; Transport protocols; Workstations;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Multimedia Computing and Systems, 1999. IEEE International Conference on
Conference_Location :
Florence
Print_ISBN :
0-7695-0253-9
Type :
conf
DOI :
10.1109/MMCS.1999.778482
Filename :
778482
Link To Document :
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