I. Operation of the RS-DVR System
Cable companies like Cablevision aggregate television programming from a wide variety of "content providers"—the various broadcast and cable channels that produce or provide individual programs—and transmit those programs into the homes of their subscribers via coaxial cable. At the outset of the transmission process, Cablevision gathers the content of the various television channels into a single stream of data. Generally, this stream is processed and transmitted to Cablevision's customers in real time. Thus, if a Cartoon Network program is scheduled to air Monday night at 8pm, Cartoon Network transmits that program's data to Cablevision and other cable companies nationwide at that time, and the cable companies immediately re transmit the data to customers who subscribe to that channel.
Under the new RS-DVR, this single stream of data is split into two streams. The first is routed immediately to customers as before. The second stream flows into a device called the Broadband Media Router ("BMR"), id. at 613, which buffers the data stream, reformats it, and sends it to the "Arroyo Server," which consists, in relevant part, of two data buffers and a number of high-capacity hard disks. The entire stream of data moves to the first buffer (the "primary ingest buffer"), at which point the server automatically inquires as to whether any customers want to record any of that programming. If a customer has requested a particular program, the data for that program
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