169 research outputs found
Edge Video Analytics: A Survey on Applications, Systems and Enabling Techniques
Video, as a key driver in the global explosion of digital information, can
create tremendous benefits for human society. Governments and enterprises are
deploying innumerable cameras for a variety of applications, e.g., law
enforcement, emergency management, traffic control, and security surveillance,
all facilitated by video analytics (VA). This trend is spurred by the rapid
advancement of deep learning (DL), which enables more precise models for object
classification, detection, and tracking. Meanwhile, with the proliferation of
Internet-connected devices, massive amounts of data are generated daily,
overwhelming the cloud. Edge computing, an emerging paradigm that moves
workloads and services from the network core to the network edge, has been
widely recognized as a promising solution. The resulting new intersection, edge
video analytics (EVA), begins to attract widespread attention. Nevertheless,
only a few loosely-related surveys exist on this topic. The basic concepts of
EVA (e.g., definition, architectures) were not fully elucidated due to the
rapid development of this domain. To fill these gaps, we provide a
comprehensive survey of the recent efforts on EVA. In this paper, we first
review the fundamentals of edge computing, followed by an overview of VA. The
EVA system and its enabling techniques are discussed next. In addition, we
introduce prevalent frameworks and datasets to aid future researchers in the
development of EVA systems. Finally, we discuss existing challenges and foresee
future research directions. We believe this survey will help readers comprehend
the relationship between VA and edge computing, and spark new ideas on EVA.Comment: 31 pages, 13 figure
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Advances in Simultaneous Translation
Simultaneous translation, which translates concurrently with the source language speech, is widely used in many scenarios including multilateral organizations. However, it is well known to be one of the most challenging tasks for humans due to the simultaneous perception and production in two languages. On the other hand, simultaneous translation is also notoriously difficult for machines and has remained one of the holy grails of AI. The key challenge is the word order difference between the source and target languages. There have been efforts towards genuine simultaneous translation, but all these efforts have the following major limitations: (a) none of them can achieve any arbitrary given latency; (b) their base translation model is still trained on full sentences; and (c) their systems are complicated, involving many components and are difficult to train. In this thesis, we start by introducing several simultaneous translation approaches with two orthogonal categories: fixed or adaptive latency policies; trained on full sentences or not. Then, we investigate how to improve simultaneous translation with beam search which is universally used in full-sentence translation but non-trivial to be applied in simulta- neous translation. Finally, we explore speech-to-speech simultaneous interpretation by incorporating streaming ASR and incremental TTS
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