| 摘要 |
PURPOSE: A methods and an apparatus for advanced interactive services for digital television and video service networks and receivers are to provide a digital service network with interactivity where the user can interactively select the programs desired. CONSTITUTION: A View-to-Save system(100), a digital video or TV service operator(111) transmits a combined MPEG-2 signal over a channel(112) to receiver(115) of the end users(114). Within the transmitted combined MPEG-2 signal, background commercials(116) are encoded, packetized, multiplexed along with packetized bit streams of regular programs(117). The methods of packetizing, multiplexing, and, sending coded bit streams of multiple programs generally implement the international standard ISO/IEC 13818-1 which is also known as MPEG-2 systems. A simplified illustration showing the multiplexing of bit streams of regular program data along with the data from background. The VSR(115) receives the signal from the channel(112), demodulates the signal to retrieve the bit streams of the regular programs(117) and the background commercials(116), and then extracts the bit streams of the regular programs(117) and the background commercials(116). The regular programs(117) are normally decoded and delivered to a presentation unit(118) without any alteration if the View-to-Save service function of the receiver(115) has been disabled by the user(114).
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