N. Matoba et al., CHARACTERISTICS OF VIDEO COMMUNICATION-SYSTEM IN MOBILE RADIO CHANNEL, IEICE transactions on communications, E80B(8), 1997, pp. 1175-1181
This paper describes the performance of a video communication system o
ver mobile radio channels. Mobile channel quality changes rapidly due
to various Factors. When compressed video data is transmitted through
these channels, it is indispensable to employ an error control scheme
because reconstructed video quality is seriously degraded by channel e
rror. To control this error, an automatic repeat request (ARQ) scheme
is often employed, however, this incurs a cost. The benefit of a non-d
egraded reconstructed video sequence is offset by the transmission del
ay due to ARQ retransmission. We apply to a video communication system
a selective-repeat ARQ which is combined with the coding control sche
me to reduce the transmission delay. We evaluate the quality of the re
constructed video sequence and transmission delay using computer simul
ations and make clear its applicability over Rayleigh and Nakagami-Ric
an fading channels and intersymbol interference.