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Mismatched acoustic transmission channels are known to cause degradations in reliability of automated speaker recognition. The problem becomes significant in the presence of non-trivial ambient noises and acoustic reverberation. Channel equalization, i.e. the removal or reduction of the channel effects, to some extent, mitigates the mismatching problem at the cost of added distortions to the vulnerable...
Ever increasing volumes of media content and the desire to extract information from media archives motivate the studies into semantic audio information mining. Much research in this filed concerns development of bespoke systems, in which soundtracks are exclusively classified and segmented, and a specific type of sound is recognized and analyzed. This approach however is detrimental to the complete...
In view of the landing site positioning of the lunar probe, this paper proposes a positioning reduction method based on VLBI tracking data, and applies VLBI delay-observation data from more than three baselines to complete positioning reduction with the distance between the lunar lander and the center of the earth as a constraint. Simulation results show that the positioning accuracy of landing point...
We introduce a figure of merit (FoM) to quantify RRAM read current instability, a complex multi-level RTN-like signal, generally observed in read current. Log(FoM) follows a normal statistical distribution describing the probability of occurrence of a read current fluctuation of a given amplitude. We demonstrate that peak-to-peak RTN amplitude decreases with the reduction of the read current that...
Motion recognition via trajectory is important in motion analysis for many robotic tasks. A descriptor for motion trajectories plays an important role in the recognition algorithm. Existing invariant descriptors and discrete matching algorithms are not flexible enough under certain circumstances for recognition. In this paper we propose a new descriptor to solve this problem, with a modified data...
This paper proposes a digital background calibration algorithm for pipelined analog-to-digital converters (ADCs). The algorithm doesn't modify pipeline stages and only needs simple calibration logic. Based on the analysis of the output codes, the algorithm estimates the bit weight of each stage and calculates the outputs. To verify the algorithm, a 13-bit pipelined ADC with 1.5-bit/stage architecture...
Based on the analysis of constant frequency, periodical frequency-spreading scheme and chaotic frequency-spreading scheme, the article has discussed the mechanics and the characters of the chaotic PWM suppressing EMI in the converter. Experiments have been made on an AC-DC forward converter. The experiment results show that the EMI spectrum is decided completely by the PWM spectrum, and the chaotic...
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