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Recent broadcast standards support Layered Division Multiplexing (LDM) to achieve graceful degradation as signal quality degrades at the receiver. LDM is accomplished by using different constellations within the same Radio Frequency (RF) spectrum. LDM thus enables delivering multiple service tiers in a single broadcast channel. LDM when used in conjunction with scalable source coding codecs such as...
In the recent past, satellite TV faces fierce market competitions with cable TV, IPTV, and the increasingly prevalent Internet TV. It can be anticipated that, in order to successfully survive in the next decade, satellite TV operators will deliver a larger number of TV channels with diverse programs in enhanced video formats, such as ultra-HD and 3D, to bring viewers much richer video and audio experience...
Television industry lately started to provide viewers with ultra-HD (UHD) TV programs, which considerably increases the transmission bandwidth requirements, in particular in satellite TV broadcasting systems. This paper proposes a hybrid broadcast & multicast channel transmission scheme for the next generation satellite TV systems, which according to the simulation results can effectively decrease...
Few trends in education in the last century match the sudden onset of Massive Open Online Courses (MOOCs). The modern MOOC movement started in late 2011, when the first standard MOOC was launched. In few years, MOOCs have received immense coverage in media, academia and industry. MOOCs have established one of the key facts that education is no longer a privilege but a basic right. Students can learn...
In the developing scalable extension of the HEVC/H.265 standard, a low-resolution baselayer picture may be used for predicting a higher resolution enhancement layer. This requires an upsampling process to generate the prediction, and this upsampling process is traditionally a linear and time invariant interpolator. In this paper, we consider an upsampling design that is both non-linear and content...
In order to increase the spectrum resource utilization, Flexible Bandwidth Optical Networks is developed to adaptively allocate an appropriately-sized optical bandwidth to an end-to-end optical path. In this paper, a novel collision-aware spectrum assignment scheme called Collision-aware Weight based Fit (CWF) has been proposed for Flexible Bandwidth Optical Networks. Based on the weight-based idea,...
Ultra-wideband (UWB) communication is currently considered as a key technology of the next generation wireless personal area network (WPAN) and wireless local area network (WLAN). UWB operation do not require a spectrum license but UWB devices are required to share spectrum with licensed narrow band users. This paper presents a novel system for direct sequence (DS) UWB and the proposed dynamic bandwidth...
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