Satellite set-top box
Digital broadcast systems such as direct broadcast digital satellite systems provides a number of advantages to subscribers, such as variety and flexibility of programming, useful and comprehensive support services, and superior audio and video quality. Generally, a subscriber signal conversion apparatus is required to receive a satellite broadcasting signal. The subscriber signal conversion apparatus is a home telecommunication terminal coupled to the TV set and is called a set-top box (STB). Set-top boxes are used to control the conversion of the media signal transmitted from a content provider into the images and sounds that are provided by a corresponding media display device. Set-top boxes are configured to receive electronic program guide (EPG) information from the service provider to provide broadcast scheduling information to the user. Set top boxes allow users to digitally record programming content such as television programs, lock certain channels from being accessed without permission, view electronic program guide data, and set personal preferences that control how the program guide data and/or the programming content is presented to the user. Set-top boxes are microprocessor-based controllers that control the operation of media systems. Set-top boxes generally include a processor, a non-volatile memory for storing program instructions that controls media signal conversion when the set-top box is off, and a main memory which provides fast processor access to the program instructions when the set-top box is on. Digital set-top boxes not only facilitate the tuning of television programming but also are destined to provide pay per view, interactive television and Internet access to subscribers. Digital set-top boxes are basically powerful computers with high-speed communications ability. In an intelligent set-top box, information and instructions associated with receiving and processing digital broadcast signals are stored in a memory unit of the set-top box and executed by a processor. With a bi-directional set-top box, in addition to receiving broadcast signals, a subscriber can transmit messages to the digital broadcast system operator.
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