SYSTEM AND METHOD FOR CANCELING IPPV PURCHASING PROGRAM OF VIDEO/AUDIO CHANNEL AND MUSIC CHANNEL OF DMB SYSTEM

摘要

Disclosed is a system and method for canceling an IPPV purchase for a video/audio channel or a music channel in a digital broadcasting system, the IPPV purchase cancellation system including: a callback server; a BIS for receiving an IPPV purchase history and a purchase cancellation history from the callback server, managing a total usage limit and an accumulated usage history, and managing the number of tokens required; a CAS for transmitting an ECM and an EMM to the digital broadcast receiving terminal, wherein the CAS is connected to a PMS, sets an IPPV usage limit of the digital broadcast receiving terminal of a subscriber, manages a total usage limit and purchase, and restricts adult-only programs from being illegally viewed and broadcast programs from being illegally viewed by a user for whom service has been temporarily revoked.