Transmission System for ISDB-T

Takada, Masayuki; Saito, Masato

doi:10.1109/jproc.2005.859692

Cited by 88 publications

(46 citation statements)

References 1 publication

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“…As they operate on the same frequency, potentially there are regions where the signals from several transmitters do not respect the 19 dB co-channel protection ratio determined by Resolution [5]. However, the BST-COFDM modulation, used in ISDB-Tb [6], allows the formation of single frequency networks, because the guard interval that guarantees immunity to intersymbol interference of reflections and multipath, can also be used to generate constructive combinations with the signals of several transmitters. In this case, the concern is no longer the difference of field strength between the signals of several transmitters, but rather the delay with which these signals are delivery to the receiver.…”

Section: A Technicalmentioning

confidence: 99%

Reasons for SFN Failure in Broadcast

Cardoso¹,

Iano²,

Carvalho³

et al. 2017

SET IJBE

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Abstract-To deliver the content of a TV network, ensuring efficient spectrum usage, filling not covered and shadow areas, and with energy savings are the advantages of Single Frequency Networks. Thus, in this study we sought to measure information, frequency, and time synchronism to evaluate the status of SFN implementation in Brazilian broadcasting. We took as base of analysis the Digital TV stations of the Campinas/SP area. Through this paper, we demonstrate that one of the great advantages of ISDB-Tb, the formation of a single frequency network, still cannot be implemented in Brazil.

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Section: A Technicalmentioning

confidence: 99%

Reasons for SFN Failure in Broadcast

Cardoso¹,

Iano²,

Carvalho³

et al. 2017

SET IJBE

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“…ISDB-T [41] is a digital video broadcast standard defined in Japan, which is not only for fixed video receivers but also for mobile receivers. ISDB-T divides its spectrum into 13 segments, where 12 of them are used for broadcasting HDTV and one is for broadcasting to mobile devices.…”

Section: Overviewmentioning

confidence: 99%

Efficient mobile multimedia streaming

Hsu¹

2010

SIGMultimedia Rec.

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Modern mobile devices have evolved into small computers that can render multimedia streaming content anywhere and anytime. These devices can extend the viewing time of users and provide more business opportunities for service providers. Mobile devices, however, make a challenging platform for providing high-quality multimedia services. The goal of this thesis is to identify these challenges from various aspects, and propose efficient and systematic solutions to solve them. In particular, we study mobile video broadcast networks in which a base station concurrently transmits multiple video streams over a shared air medium to many mobile devices. We propose algorithms to optimize various quality-of-service metrics, including streaming quality, bandwidth efficiency, energy saving, and channel switching delay. We analytically analyze the proposed algorithms, and we evaluate them using numerical methods and simulations. In addition, we implement the algorithms in a real testbed to show their practicality and efficiency. Our analytical, simulation, and experimental results indicate that the proposed algorithms can: (i) maximize energy saving of mobile devices, (ii) maximize bandwidth efficiency of the wireless network, (iii) minimize channel switching delays on mobile devices, and (iv) efficiently support heterogeneous mobile devices. Last, we give network operators guidelines on choosing solutions suitable for their mobile broadcast networks, which allow them to provide millions of mobile users much better viewing experiences, attract more subscribers, and thus increase the revenues.

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“…In this paper, we focus on broadcast networks, which have the potential to serve to a large number of subscribers. There are several systems and standards for video broadcast networks, including T-DMB [8], ISDB-T [9], MediaFLO [3], and DVB-H [2], [10]. Among the above broadcast networks, only DVB-H and MediaFLO try to minimize the energy consumption of mobile devices by periodically turning their RF circuits off.…”

Section: A Mobile Tv Networkmentioning

confidence: 99%

Time Slicing in Mobile TV Broadcast Networks with Arbitrary Channel Bit Rates

Hsu

Hefeeda

2009

Ieee Infocom 2009

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Abstract-Mobile TV networks have received significant attention from the industry and academia, as they have already been deployed in several countries and their expected market potential is huge. In such networks, a base station broadcasts TV channels in bursts with bit rates much higher than the encoding bit rates of the videos. This enables mobile receivers to receive a burst of traffic and then turn off their receiving circuit till the next burst to conserve energy. The base station needs to construct a transmission schedule for all bursts of different TV channels. Constructing optimal (in terms of energy saving) transmission schedules has been shown to be an NP-complete problem when the TV channels are encoded at arbitrary bit rates. In this paper, we propose a near-optimal approximation algorithm to solve this problem. We prove the correctness of the proposed algorithm and derive its approximation factor. We also conduct extensive evaluation of our algorithm using real implementation in a mobile TV testbed and simulations. Our experimental and simulation results show that the proposed algorithm: (i) is practical and produces correct burst schedules, (ii) achieves near-optimal energy saving for mobile devices, and (iii) runs efficiently in real time.

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Transmission System for ISDB-T

Cited by 88 publications

References 1 publication

Reasons for SFN Failure in Broadcast

Reasons for SFN Failure in Broadcast

Efficient mobile multimedia streaming

Time Slicing in Mobile TV Broadcast Networks with Arbitrary Channel Bit Rates

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