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Network system and method for ground digital multimedia broadcasting by using satellite data path

A technology of multimedia broadcasting and network system, applied in the field of terrestrial DMB network, can solve the problem of installation antenna limitation and so on

Inactive Publication Date: 2007-02-07
STIT TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Separating the receive and transmit antennas can limit the ability to install antennas in gap fillers

Method used

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  • Network system and method for ground digital multimedia broadcasting by using satellite data path
  • Network system and method for ground digital multimedia broadcasting by using satellite data path
  • Network system and method for ground digital multimedia broadcasting by using satellite data path

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Embodiment Construction

[0047] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the invention may be embodied in different forms and should not be construed as limited to the embodiments described herein. Furthermore, these embodiments are provided so that this disclosure will be thorough and complete and will convey the scope of the invention to those skilled in the art. Throughout the specification, like reference numerals refer to like parts.

[0048] Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

[0049] The newly developed terrestrial DMB network system uses satellite link relay stations as gap fillers 130 and 130' instead of conventional RF relay stations and optical link relay stations. Satellite link repeaters (i.e., gap fillers 130 and 130') use transmit and receive signals of a different frequency bandwidth than those used in co...

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Abstract

Disclosed is a network system for ground digital multimedia broadcasting (DMB). The DMB system includes a ground path and a satellite link path. The ground path includes a base station, modulating the first type signals received from the broadcasting center into the second type signals for ground DMVB, to transmit them to the receiver in the reception area. The satellite link path includes a satellite earth station, modulating the first type signals received into the third type signals with the bandwidth larger than that of the second type signals and transmitting them to the satellite; and a gap stuffer, receiving the third type signals to process the fourth type signals through executing the signals including the coding and crossed signals and converting the fourth type signals to the second type signals to transmit them to the receiver in the non-reception area. The third type signals include the fiducial time information and the gap stuffer uses the fiducial time information to transmit the second type signals with the base station simultaneously.

Description

technical field [0001] The present invention relates to digital multimedia broadcasting (DMB) networks, and more particularly, to terrestrial DMB networks. Background technique [0002] Digital Multimedia Broadcasting (DMB) is a broadcast service that can provide high-quality music, pictures, and communications in both mobile and non-mobile service areas. According to the transmission method and service frequency bandwidth, DMB can be divided into ground DMB and satellite DMB. Satellite DMB utilizes ultra-high frequency (UHF) of 1400-2700MHz through satellites, while ground DMB does not utilize satellites and uses very high frequency (VHF) of 200MHz. [0003] After going through the trial broadcasting stage, test broadcasting stage, and main broadcasting stage, a broadcasting center (eg, Korean Broadcasting System: KBS) relays terrestrial DMB signals using a dedicated frequency bandwidth. In order to relay DMB signals, a minimum bandwidth of 2MHz should be guaranteed. For...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/185H04B7/17H04L27/26H04N7/52H04N21/236H04N7/20
CPCH04H20/72H04H2201/11H04L27/2666H04N7/0803H04N7/20H04N21/4348
Inventor 李海澈李在鹤金炫采
Owner STIT TECH CORP
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