Abstract: A apparatus provides a voltage clamp step-up boost converter that is capable of reducing voltage stress on a switch and a diode of the boost converter without using a dissipative snubber and that is capable of reducing a switching loss while maintaining a high input-to-output boost ratio.

Abstract: An apparatus provides a soft-switched voltage clamp tapped-inductor step-up boost converter that is capable of reducing voltage stress on a switch and a diode of the boost converter without using a dissipative snubber and that is capable of reducing a switching loss while maintaining a high input-to-output boost ratio.

Abstract: Disclosed is a broadcasting system management method for use in a plurality of broadcasting systems in diverse locations, wherein the method includes the steps of: checking the status of the broadcasting systems at a server networked with a plurality of broadcasting systems; and notifying the results of the check to an expert manager.

Abstract: Disclosed is a broadcasting service method to be performed by a host that is networked with a plurality of broadcasting systems in diverse locations, wherein the method comprising the steps of: receiving information necessary for creating a broadcasting schedule from one of a plurality of broadcasting systems; creating a broadcasting schedule adaptive to a corresponding broadcasting system based on the provided information for creating the broadcasting schedule; storing the broadcasting schedule; and providing a corresponding broadcasting content using an adequate broadcasting system by allowing access to at least one of the adequate broadcasting systems among the diverse broadcasting content that the host provides.

Abstract: Disclosed is an intelligent broadcasting control system mounted with a number of sound devices, wherein the system includes: a main controller for checking the state of the system and controlling devices connected to the system; a digital audio processor controlled by the main controller for adjusting the level of a sound source inputted from external sound source devices to a designated output level and for outputting sounds; an amplifier fault detector for self-detecting any fault in an amplifier connected to the system and automatically switching a faulty amplifier to an auxiliary amplifier; a relay group disposed between the amplifier fault detector and a speaker for controlling the speaker to which osund signals ouputted from the digital audio processor are outputted; and a permanent digital recorder and player for recording a broadcasting program under the control of the main controller in case broadcasting itself becomes impossible and broadcasting inputis required from the outside, whereby a pre-recor