An interactive program guide (IPG) may include a program grid section and a multimedia section. The program grid section typically contains program information organized in a grid with a time axis and a channel axis. The multimedia section may include video for advertisement, previews, and other purposes....http://www.google.com/patents/US7254824?utm_source=gb-gplus-sharePatent US7254824 - Encoding optimization techniques for encoding program grid section of server-centric interactive programming guide
