Title :
Wireless video conferencing using multiple description coding
Author :
Sehgal, Aizshul ; Jagmohan, Ashish ; Ahuja, Narendra
Author_Institution :
Beckman Inst., Illinois Univ., Urbana, IL, USA
Abstract :
The transmission of video over wireless is a particularly involved problem-requiring as it does the transmission of a variable length highly compressed, delay-sensitive stream over an error prone medium. In this paper, this problem is addressed within the multiple description coding paradigm. In particular the problem of wireless video conferencing over a constant bit-rate channel is addressed. A low-complexity, low-delay adaptive coder that uses multiple description coding to combat channel errors is proposed. Error propagation is curtailed by using a leaky prediction mechanism. A low-complexity rate control scheme based on the LMS algorithm is also proposed
Keywords :
adaptive signal processing; digital radio; errors; fading channels; least mean squares methods; prediction theory; redundancy; teleconferencing; video coding; visual communication; LMS algorithm; channel errors; constant bit-rate channel; error propagation reduction; leaky prediction mechanism; low-complexity adaptive coder; low-complexity rate control scheme; low-delay adaptive coder; multiple description coding; wireless video conferencing; Bit error rate; Degradation; Delay; Fading; Frequency; Least squares approximation; Redundancy; Streaming media; Video compression; Videoconference;
Conference_Titel :
Circuits and Systems, 2001. ISCAS 2001. The 2001 IEEE International Symposium on
Conference_Location :
Sydney, NSW
Print_ISBN :
0-7803-6685-9
DOI :
10.1109/ISCAS.2001.922045
