초록 ▼

A home video system comprising a headend system, a transmission channel, a trap, a converter, descrambling equipment, receiving equipment, and requesting equipment. The headend equipment includes program equipment, interface equipment, protection equipment, scrambling equipment, and processor equipm

A home video system comprising a headend system, a transmission channel, a trap, a converter, descrambling equipment, receiving equipment, and requesting equipment. The headend equipment includes program equipment, interface equipment, protection equipment, scrambling equipment, and processor equipment. A transmission channel has a large capacity for a broadcast signal. The broadcast signal includes a plurality of standard signals occupying a first set of channels and a plurality of special signals occupying a second set of channels. The program equipment originates the braodcast signal. The interface equipment is coupled between the program equipment and the transmission channel, and interfaces the broadcast signal from the program equipment with the transmission channel. The protection equipment prevents recording of a first set of special signals. The scrambling equipment scrambles a second set of special signals. The processor tracks pay-per-view subscriber usage of the home video system.

대표청구항 ▼

A home video system for use by a headend transmitting simultaneously a plurality of standard signals including audio and video signals, and a first set and a second set of special signals including audio and video signals, to allocate a predetermined combination of services selected from a plurality

A home video system for use by a headend transmitting simultaneously a plurality of standard signals including audio and video signals, and a first set and a second set of special signals including audio and video signals, to allocate a predetermined combination of services selected from a plurality of more than two different services, each including at least video and audio services, to selected blocks of a plurality of users, comprising: a cable serving as a transmission channel having a large capacity for the plurality of standard signals and the first and second set of special signals; a headend system including, program means for originating the plurality of standard signals and the first and second set of special signals; interface means coupled between said program means and said cable for interfacing the plurality of standard signals and the first and second set of special signals from said program means with said cable; protection means coupled between said program means and said interface means for distorting the synchronization pulse signal of the first set and second set of the special signals for preventing recording of the first set and second set of the special signals while allowing direct use of the received signals by each subscriber; scrambling means coupled between said program means and said interface means for scrambling the second set of the special signals; processor means coupled to said program means for tracking pay-per-view subscribed usage; a trap coupled to said cable and responsive to a first code transmitted from said headend system for filtering signals from among a first block of the first and second sets of the special signals; a converter coupled to said trap and responsive to a second code transmitted from said headend system for filtering signals from among a second block of the first and second sets of special signals; means coupled to said converter for descrambling signals from among the second set of special signals; means coupled to said descrambling means and said converter for receiving the standard signals and signals from among the first and second block of the first and second sets of special signals passing through said trap and said converter; and means located at said receiving means and coupled to said headend system for requesting the reception of a particular special signal.