Its interactive menus are generated entirely within local receiving or display equipment using raw scheduling data sent by individual broadcast stations or centralized scheduling information providers.A typical IPG provides information covering a span of seven or 14 days.A presentation on the system was given at the 1990 IEEE consumer electronics symposium in Chicago. In 1996, Prevue Networks (the parent of what, by that point, had become the Prevue Channel) introduced the first IPG service in the United States, Prevue Interactive, designed for the General Instruments DCT 1000 series of set-top digital cable converter boxes.Prevue Interactive would later become TV Guide Interactive, and then i-Guide.Data used to populate an interactive EPG may be distributed over the Internet, either for a charge or free of charge, and implemented on equipment connected directly or through a computer to the Internet.Television-based IPGs in conjunction with Programme Delivery Control (PDC) technology can also facilitate the selection of programs for recording with digital video recorders (DVRs), also known as personal video recorders (PVRs).Electronic program guides (EPGs) and interactive program guides (IPGs) are menu-based systems that provide users of television, radio and other media applications with continuously updated menus displaying broadcast programming (TV listings in the UK) or scheduling information for current and upcoming programming.Some guides also feature backward scrolling to promote their catch up content. Non-interactive electronic program guides (sometimes known as "navigation software") are typically available for television and radio, and consist of a digitally displayed, non-interactive menu of program scheduling information shown by a cable or satellite television provider to its viewers on a dedicated channel.
The system was developed by Chris Schultheiss of STV/On Sat and engineer Peter Hallenbeck.EPGs are transmitted by specialized video character generation (CG) equipment housed within each such provider's central headend facility.By tuning into an EPG channel, a menu is displayed that lists current and upcoming television programs on all available channels.Raw listings data for the service was supplied via satellite to participating cable systems, each of which installed a computer within its headend facility to present that data to subscribers in a format customized to the system's unique channel lineup.The EPG Channel would later be renamed Prevue Guide and go on to serve as the de facto EPG service for North American cable systems throughout the remainder of the 1980s, the entirety of the 1990s, and – as TV Guide Network or TV Guide Channel – for the first decade of the 21st century.The original system had a black-and-white display, and would locally store programming information for around one week in time.A remote control was used to interact with the unit.Update 3 (9/14): According to Dish Network's official Twitter account, things should be up and running again now. We have identified the issue and based on our current estimates, the situation should be corrected overnight and your HD channels should be restored in the morning.In the meantime, you can unplug your receiver from the main power source and plug it back in to see your standard definition channels. In Western Europe, 59 million television households were equipped with EPGs at the end of 2008, a penetration of 36% of all television households.The situation varies from country to country, depending on the status of digitization and the role of pay television and IPTV in each market.