Sonic Solutions has announced that they've started shipping the world's first high-definition authoring systems, Scenarist 4 and CineVision. Here's part of their press release:
Sonic Solutions (NASDAQ: SNIC),released the world's first professional high-definition authoring and encoding systems, Scenarist 4 and CineVision, to enable major motion picture studios to begin the rollout of Blu-ray Disc and HD DVD commercial titles. Designed for professional content creators who demand the highest level of creative control, Scenarist 4 offers complete support for HDMV (Movie Mode) and BD-J Blu-ray Disc authoring in addition to Standard and Advanced Content HD DVD authoring. Also delivering comprehensive next-generation format support is CineVision, Sonic's Hollywood-quality encoding workstation that provides expert control over all three HD video codes: AVC/H.264, VC-1, and MPEG-2. Sonic will be demonstrating Scenarist 4 and CineVision during the National Association of Broadcasters show taking place this week at the Las Vegas Convention Center, booth SL3750.

Scenarist 4 and CineVision were developed in collaboration with the High Definition Authoring Alliance (HDAA), an association of top authoring and post-production facilities around the globe, that Sonic formed in 2005 to help facilitate the successful launch of high-definition titles. Both Scenarist 4 and CineVision were refined based on feedback from content creators who used pre-release versions to produce the industry's first replicated discs using the advanced interactive modes of Blu-ray Disc and HD DVD.
More information on both Scenarist 4 and CineVision can be found here.