To: Don Pueblo who wrote (44505 ) 9/6/1999 10:58:00 AM From: John Rieman Respond to of 50808
MPEG-4, Quicktime and the internet................. The second version of MPEG-4, which will be the first to be commercialized, is expected to be finalized by year's end, says Eric Petajan, a member of the technical staff at Lucent Technologies, who represents the company in the MPEG-4 process. At the low end, MPEG-4 can separate the instructions that represent the execution of user commands from the delivery of the content itself. This way, the graphic components can be delivered in occasional bursts and stored in memory at the end-user terminal before they're needed. Then, only instructions need to be sent to set the graphics in motion. To do this, MPEG-4 defines various types of graphic objects as reference models that certain commands are linked to, allowing objects already residing at the computer to be manipulated. For example, Petajan, in a recent demonstration, showed how a face can be made to speak, by just sending instructions to move a few "facial reference points." "You can scan over and replay content already downloaded to the terminal, allowing the level of resolution in the display to be determined by the capabilities of the CPU rather than by available bandwidth," Petajan says. This means that the scenes in a multimedia game or other compact disclike content might be displayed at graphic quality levels and manipulated at frame rates comparable to high-definition television over relatively low-speed links, he adds. MPEG-4 also gives content developers a standard set of tools for doing all the things they now have to do by bringing together a lot of disparate elements themselves, such as 3-D rendering and the synchronization of various multimedia components. Make it quick Apple Computer's development of QuickTime 4.0 is another key development. The QT file format has been adopted as the basic reference file format for MPEG-4. QuickTime has been made more compatible across different types of computers in conjunction with the tie-in to MPEG-4. more......................zdnet.com