High performance computing of line of sight viewshed
Ligang Lu, Brent Paulovicks, et al.
ICME 2011
Compared with either heuristic or RD optimization based approaches, frame-level bit allocation strategies based on constant quality models are inadequately studied, which, however, are inherently more capable on achieving consistent video quality over the whole sequence for real-time single-pass rate control tasks. Moreover, no any existent models is error-resilient. In this paper, we propose a novel error resilient source-channel constant distortion (SCCD) model, whose uniquely selected frame complexity measure effectively accomodates the joint impact from both the non-stationary source video signal and the lossy channel. Compared with its existent counterparts, our model has a higher modelling accuracy, and can be generally applied in frame-level bit allocation to enhance error robustness of rate control. As an example, an error resilient frame-level bit allocation solution is proposed based on the model. Simulation results demonstrate that: for lossy video transmission, the proposed method can achieve more consistent and higher overall visual qualities than that of the other non-error-resilient schemes, which proves the remarkable potentials of the new model.
Ligang Lu, Brent Paulovicks, et al.
ICME 2011
Ligang Lu, Vadim Sheinin
ICIP 2004
Ligang Lu, Jack L. Kouloheris
IS&T/SPIE Electronic Imaging 2002
Ming Liu, Ziyou Xiong, et al.
ICASSP 2004