abstract:MasterFormat is a standard for organizing specifications and other written information for commercial and institutional building projects in the U.S.
Letter Box format is actually meant for widescreen movie theaters but a lot of people want the same aspect ratio and resolution as they see in the theaters, problem is, most of the time the master recording is in LB format.
The YHT-697BL offers a full complement of HD Audio format decoding, including Dolby TrueHD, DTS-HD Master Audio, Dolby Digital Plus and DTS-HD High Resolution Audio.