Wakefield, UK (October 7, 2010)--Dolby sound consultants employed SoundField's UPM-1 upmix processor during the recent world premiere of Disney's Prince Of Persia in London.
Two rounds of interviews were conducted in London with the film's principal cast, which includes Jake Gyllenhaal, Gemma Arterton, and Sir Ben Kingsley, with the results simultaneously broadcast to premieres around the world. However, with the film's soundtrack in cinematic surround sound, Disney wanted to ensure that the introductory interviews were also multichannel.
While no outside broadcast vehicles capable of broadcasting in 5.1 were available, OB experts Arqiva were able to spare a satellite uplink truck, and Sassy Films provided stereo OB facilities at both the Dorchester and the Westfield center--however, nothing capable of 5.1 broadcast was available.
The solution came in the form of SoundField's UPM-1 stereo-to-5.1 upmix processor, which was designed to convert a stereo broadcast mix to fold-down-compatible 5.1. Mono content, like the dialogue in the interviews conducted for the premieres, is separated from an original stereo mix and may be spread across the front three channels of a surround mix, or restricted to the 5.1 mix's center channel. More reverberant audio, like crowd noise, is placed into the rear channels.
Dolby sound consultant Richard Stockdale, who was responsible for the audio broadcast from the London-based events, comments, "We used four in total because we needed a main and a backup unit at both of the broadcast locations, at the Dorchester and at the Westfield. The UPM-1 was very simple to use—we just plumbed in the UPM-1s in the Arqiva uplink between the feed from the stereo OB scanner and our DP569 Dolby Digital encoders, before sending the whole thing out to the satellites from the uplink."
"In short, the UPM-1 worked well," concludes Stockdale. "It solved our problem, and gave us the 5.1 mix we needed for the premieres. Job done!"