Mitsubishi Electric

About: Mitsubishi Electric is a company organization based out in Ratingen, Germany. It is known for research contribution in the topics: Signal & Voltage. The organization has 23024 authors who have published 27591 publications receiving 255671 citations. The organization is also known as: Mitsubishi Electric Corporation & Mitsubishi Denki K.K..

A triple-concatenated FEC using soft-decision decoding for 100 Gb/s optical transmission

Abstract: We propose a novel triple-concatenated forward error correction for 100Gb/s transmission. Simulation shows that a net coding gain of 10.8dB is obtained by a soft-decision LPDC code concatenated with the enhanced FEC listed in G.975.1.

Online Detection of Action Start in Untrimmed, Streaming Videos

Abstract: We aim to tackle a novel task in action detection - Online Detection of Action Start (ODAS) in untrimmed, streaming videos. The goal of ODAS is to detect the start of an action instance, with high categorization accuracy and low detection latency. ODAS is important in many applications such as early alert generation to allow timely security or emergency response. We propose three novel methods to specifically address the challenges in training ODAS models: (1) hard negative samples generation based on Generative Adversarial Network (GAN) to distinguish ambiguous background, (2) explicitly modeling the temporal consistency between data around action start and data succeeding action start, and (3) adaptive sampling strategy to handle the scarcity of training data. We conduct extensive experiments using THUMOS’14 and ActivityNet. We show that our proposed methods lead to significant performance gains and improve the state-of-the-art methods. An ablation study confirms the effectiveness of each proposed method.

DC power-supply system with inverting substations for traction systems using regenerative brakes

Abstract: Reversible DC power-supply systems with thyristor inverters are described. Design principles applicable to and technical difficulties encountered by the reversible DC power-supply system are discussed. To give an example of application, the power-supply system of Kobe Metro is described in detail, together with principal designs, solutions adopted to overcome the technical difficulties and some operational results. Some more examples of application in Japan are referred to as further experiences of the system. The designs described are supported by service experience.

Data receiver having variable rate symbol timing recovery with non-synchronized sampling

Abstract: An adaptable, variable rate symbol timing recovery system for a digital signal receiver comprises an analog to digital (A-D) signal converter having analog signal input and digital data signal output terminals. A source of selectable, substantially fixed rate, data sampling clock signals is coupled to the A-D signal converter for sampling a signal received at the input at a predetermined, substantially fixed clock rate, depending on data rate and modulation of the received signal. A digital signal processing loop is coupled to the digital data signal output terminal for adjustably producing interdependent signals in synchronism with the data signals at said output terminal which are asynchronous with respect to the fixed rate clock signals. A Controller is provided for selectively configuring the data sampling clock signal source and the digital signal processing loop according to the data rate and modulation characteristics of the said received signal.

Transmitting method and transmitting device

Abstract: Out of devices connected to the same power line (7), a device which has judged based on the results of noise measurement that it is difficult to continue communication in the case of the current tone-set/tone position comes to serve as a virtual master for tone change. The device serving as a virtual master transmits a tone change request command and waits for a response from another device for a predetermined time. If the virtual master device receives even one tone change rejection command during the time, the virtual master device abandons the change and ends the virtual master processing. Conversely, if the virtual master device receives no tone change rejection command in the predetermined time, the virtual master device transmits a tone change instruction command. On receiving the tone change instruction command, all the other devices currently connected change the tone at a time.