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In this paper, we propose a method for improving the playback quality of one segment terrestrial television broadcasting (called 1seg, hereafter) at mobile terminals staying in a weak 1seg radio reception area (called WRA terminals) by wireless multi-hop video streaming from terminals in strong 1seg radio area (called SRA terminals). First, we formulate the problem to derive the set of video forwarding...
The User-Generated Contents (UGC) and User-Generated Services (UGS) concepts allow end-users to create their own contents and services as well as to share and to manage the lifecycle of these services. Web Services paradigm has been widely used for services composition in Internet to create Web applications that are flexible and rapidly deployable. In Telecom, on the other hand, the IMS (IP Multimedia...
This paper describes packet loss concealment methods for MP3 audio. The proposed methods are based on estimation of modified discrete cosine transform (MDCT) coefficients of the lost packets. The estimation of MDCT coefficients of lower dimensions is performed by switching two concealment methods: the sign correction method and the correlation-based method. The concealment methods are switched based...
A 648 MHz 153.8 mm2 45 nm CMOS SoC integrates eight general-purpose CPUs, four dynamically reconfigurable processors, two 1024-way matrix-processors, peripherals and interfaces. Using core enhancement, DDR3-I/F improvement and clock buffer deactivation, this SoC achieves 37.3 GOPS/W at 1.15 V.
For accident prevention at intersections, it is useful for drivers to grasp the position of vehicles in blind spots. This can be achieved without infrastructure if some vehicles passing near the intersection capture and share live video of the intersection through inter-vehicle communications. However, such video streaming requires a congestion control mechanism. In this paper, aiming to let a driver...
In this paper, we propose a method for video ads dissemination through a hybrid network consisting of WiFi and cellular networks, in order to provide timely delivery of video ads with preferred content to users according to the users' contexts. In recent years, video download/streaming services for cellular phones have already become popular. Among various video delivery services, a service for disseminating...
In this paper, we propose a framework which allows remote users to form conversation groups based on spatial relationship in a shared virtual space. Our proposed framework can transport awareness information of real world by capturing and transferring user's audio visual information. Our framework also provides functions useful to CSCW, which allow each user to simultaneously join different conversation...
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