By Cliff Wootton
Examine all approximately Codecs--how they paintings, in addition to layout and implementation with this entire, easy-to-use advisor to compression. After analyzing this booklet, it is possible for you to to arrange and distribute expert audio and video on any platform together with streamed to the net, broadcast on-air, kept in PVRs, Burned onto CD-ROMs or DVDs, introduced by means of broadband, or considered in Kiosk functions, PDA units, and cellphones.
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Additional info for A Practical Guide to Video and Audio Compression: From Sprockets and Rasters to Macro Blocks
Regardless of whether you use blue or green screens or even the newer retro-reflective materials to get a good hard edge for your matte, any compression that loses detail will immediately compromise your ability to pull a matte off that video. The jaggies and edge-coded artifacts are so severe that your footage is rendered useless. The solution is to get a better camera and shoot the footage at the best-quality camera settings available, and then write it to tape with a high-bit-rate storage format with a nearlossless compression method.
The MPEG-4 standard offers packaging for interactive material in a way that the current DVD specification cannot match. Hybrid DVD disks with MPEG-4 interactive content and players with MPEG-4 support could herald a renaissance in content authoring similar to what took place in the mid-1990s with CD-ROMs. The more video can be compressed into smaller packages without losing quality, the better the experience for the viewer within the same delivery form factor (disk) or capacity (bit rate). 264 codec is being adopted widely as the natural format for delivering highdefinition TV (HDTV) content on DVD and allows us to store even longer definition programs on the existing 5-GB and 9-GB disks.
The broadcaster already optimally compresses these streams. Some storage benefits could be gained by transcoding them. Note that we certainly cannot add any data back to the video that has already been removed at source. Future development work on PVR devices will focus on storing and managing content that has been delivered digitally. This is within the reach of software-based product designs and does not require massive amounts of expensive hardware. There are complex rights issues attached to home digital-recording technology, and it is in constant evolution.
A Practical Guide to Video and Audio Compression: From Sprockets and Rasters to Macro Blocks by Cliff Wootton