Pay broadcasting system

摘要: A system for the so-called "pay-per-program" is provided viewing individual program on pay basis without signing a comprehensive contract. In response to request executed via public telephone line from an applicant viewing, charging center sends permit code data communication device and collects fee program. Upon receipt of code, receiving offers according code. The broadcasting scrambled by three modes fixed, selective change. in specifying time, number temporary number. As one adopted: decode data, non-opened or