Guoqiang Li

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We present a demonstration system under the three-dimensional (3D) optoelectronic stacked processor consortium. The processor combines the advantages of optics in global, high-density, high-speed parallel interconnections with the density and computational power of 3D chip stacks. In particular, a compact and scalable optoelectronic switching system with a(More)
Maximum a posteriori adaptation method combines the prior knowledge with adaptation data from a new speaker, which has a nice asymptotical property, but has a slow adaptation rate for not modifying unseen models. In a strictly Bayesian approach, prior parameters are assumed known, based on common or subjective knowledge. But a practical solution is to adopt(More)
High-speed operation of free-space optical interconnect for a three-dimensional optoelectronic crossbar switching has been analyzed. System architecture, transmitter and receiver design are presented. The effect of ghost talk caused by the superposition of the delayed reflections of the original signal due to the multiple propagation of the wave between the(More)
In a strictly Bayesian approach, prior parameters are assumed known, based on common or subjective knowledge. But a practical solution for maximum a posteriori adaptation methods is to adopt an empirical Bayesian approach, where the prior parameters are estimated directly from training speech data itself. So there is a problem of mismatches between training(More)
Visual feature extraction method now becomes the key technique in automatic speechreading systems. However it still remains a difficult problem due to large inter-person and intra-person appearance variabilities. In this paper, we extend the normal active shape model to a hierarchy probability-based framework, which can model a complex shape, such as human(More)
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