In this paper, an H.263 video codec is implemented by adopting the concept of hardware and software co-design. Each module of the codec is investigated to find which approach between hardware and software is better to achieve real-time processing speed and flexibility. The hardware portion includes motion-related engines, such as motion estimation and compensation, and memory control. The other...

We investigate the effect of speech coding on automatic speaker recognition when training and testing conditions are matched and mismatched. Experiments use standard speech coding algorithms (GSM, G.729, G.723, MELP) and a speaker recognition system based on Gaussian mixture models adapted from a universal background model. There is little loss in recognition performance for toll quality speech...

In this contribution we present a multilingual secure access front-end that checks the identity of the user of a service through the mobile, PSTN and the IP networks (G.723, G.729). Our system prototype is based on speech recognition and speaker verification technologies and it uses a decision mechanism to combine the outputs of both modules. The main objective of the system is to increase the ...

1Department of Emergency Medicine, Stanford University School of Medicine, Stanford, CA, USA 2Department of Emergency Medicine, Stanford/Kaiser Emergency Medicine Residency Program, Stanford, CA, USA 3Department of Emergency Medicine, Kaiser Permanente Medical Group, Santa Clara, CA, USA *Corresponding author Ian D. Chong, MD Department of Emergency Medicine Stanford/Kaiser Emergency Medicine R...

1.1.1. The current balance equation. Imagine a cylindrical membrane, which separates intracellular space from the extracellular. We assume that the properties of membrane are spatially uniform and consider a small patch of the membrane. The membrane is covered with sufficiently large number of ionic channels. These channels can be in one of the two states ”open” or ”closed”. The ions from extra...

4 Department of Bioengineering, Stanford University, Stanford, CA 94305, USA #: Corresponding authors: Prof. Nidhi Bhutani, Ph.D. Prof. Fan Yang, Ph.D. Department of Ortho. Surg. Departments of Ortho. Surg. and Bioeng. 300 Pasteur Dr. , Edwards R164 300 Pasteur Dr., Edwards R105 Stanford, CA 94305-5341 Stanford, CA, 94305-5341 Tel: 650 721 2234 Tel: 650 725 7128 Fax: 650 723 9370 Fax: 650 723 9...