Monday, 6 July 2009

video production / functions and effects of video compression.

THE COMPRESSION

Video compression refers to reducing the quantity of data used to represent digital video images, and is a combination of spatial image compression and temporal motion compensation. Video compression is an example of the concept of source coding in Information theory. compressed video can effectively reduce the bandwidth required to transmit video via terrestrial broadcast, via cable TV, or via satellite TV services.

I HAVE ADDED SOME VIDEO COMPRESSION FORMATS, AND THERE MEANINGS BELOW.

MPEG

stands for the Motion Picture Experts Group, part of the International Organization for Standardization.
MPEG-2: This standard improved on MPEG-1 by including the ability to encode interlaced pictures. It is widely used for digital cable, satellite and over the air digital signals. This format is also prevalent for movies distributed on DVD. Television receivers, DVD players and television stations typically incorporate the MPEG-2 standard.

AVI

stands for Audio Video Interleave.
known by its acronym AVI, is a multimedia container format introduced by Microsoft file, is a sound and motion picture file.

FLV

FLV, a short term for Flash Video, is a kind of video format that is commonly used by many websites and users. Videos from websites like YouTube and Google Video are in FLV format. FLV can not be played directly by Flash Player or browser. If you select to generate SWF file to play outside FLV, the SWF file would works as a shell and enable the FLV to play on Flash Player.
FLV files are a binary file format that delivers "bitmapped" video, limited to one video and one audio stream per file.



Quick Time,

QuickTime is a multimedia architecture developed by Apple computer for Mac OS, Windows, and other platforms. It allows your computer to work with real-time movies, sounds, and high-quality compressed images.

1 comment:

James said...

There's also currently talks of .ogg and/or H.256 becoming web standards for HTML5; Google Chrome supports both, and Firefox supports ogg < video > tags.
Microsoft, as alwayas, are showing no commitment; and Youtube are currently saying that they prefer the non open H.256 and are thinking about using that format in the future for some browsers.

'Tis all very much worth looking into the current situation with those, it's very interesting. =)