METHOD FOR CONSTRUCTING AND TRANSMITTING INTRODUCING INFORMATION FOR IPPV SERVICE IN DIGITAL CABLE TV BROADCASTING

摘要

PURPOSE: A method for constructing and transmitting introducing information for IPPV(Impulse Pay-Per View) service in digital cable TV broadcasting is provided to obtain purchase introducing information in the most preferable way by transmitting IPPV service descriptor included in the AEIT(Aggregate Event Information Table). CONSTITUTION: In a method for constructing and transmitting introducing information for IPPV service in digital cable TV broadcasting, the IPPV service descriptor includes descriptor tag data for distinguishing various descriptors, and descriptor length data representing the whole length of any other descriptors than the descriptor tag data and its data length. Purchase price data is formed of 8 bits and displays purchase price information on a corresponding program. Purchase validation data is formed of 8 bits and represents the level for allowing a user to purchase the corresponding program by a limitation receiving part, which limits the watching of a charged broadcasting service in the user's receiver. Program start time data is formed of 32 bits and represents the start time of the corresponding program. Initial free preview duration data is formed of 16 bits and represents free preview duration from the starting time of the corresponding program. Anytime free preview duration data is formed of 16 bits and represents the free preview duration during the corresponding program. Text data represents the purchase option and explanation on the purchase option of the corresponding program. The service descriptor is inserted into the AEIT to be transmitted to subscribers according to OpenCable standards.