Dealing with video compression digital video data compression. Needed for coding video compression video data efficiently in a video file format and streaming video formats. Compression itself is a conversion of data into a smaller format, usually done so that data can be stored or transmitted more efficiently. The process of return data that has been reduced in size is called decompression.
And if the decompression process of generating the same data with compression of the original meal is called “lossless”. While the data is decompressed when the get the highest data that is smaller then the compression is called “lossy”.
Video compression “lossless”. though it may be, but in practice rarely used, and all standard video data typically discard some data.
Video is usually composed of three-dimensional array of color pixels. Two spatial dimensions as the direction of a moving image, and one dimension represents the time domain.
MPEG Video Compression Standard
Motion Picture Expert Group (MPEG) is the name of the international organization ISO / IEC to develop a moving image coding standard. The first meeting occurred in May 1998 in Ottawa, Canada. But now as an MPEG file with a different name which stands for “Moving Picture Expert Group.
Some of the standards developed are MPEG-2 and MPEG-3. MPEG-2 encoding used on video CDs, while MPEG-3 became popular with the appearance of MPEG audio layer-3, known as MP #.
MPEG evolved into several categories:
- MPEG-1, voice compression standards and video images on a CD as well as audio layer 3 (Audio Layer 3) MP3 compression format for voice.
- MPEG-2 standard for sound and video broadcasting over-the-air digital television ATSC, DVB and ISDB, digital TV satellite Dish Network, digital cable television signals and DVD
- MPEG-3, the standard for HDTV High-definition television.
- MPEG-4, the development of MPEG-1 to support the sound object / image three-dimensional television.
- MPEG-7, the standard of a formal system to describe the contents of a multimedia.
- MPEG-21, the MPEG standard for next-generation MSA (multimedia framework)
DivX video file: DVD quality with small files
A video codec created by DivX, Inc., which became famous because it can compress the video into a small size with relatively good quality. DivX uses lossy compression MPEG-4 Part 2. Because it is often used to make copies of copyrighted DVDs, DivX became controversial. Currently, many DVD players on the market that can play DivX movies.
Video compression format based on MPEG-4 has a very small size, it can even reach less than one-eighth the size of MPEG-2 quality is maintained. This format is often referred to video MP3.
DivX video is usually rice have the extension. DivX, mp4, or avi. Extension. Avi DivX’s certainly different. Avi standard. For the device used lunk player that can play files with this format, should be added adds-on or DivX Codec or special player.
DivX for Windows is specifically intended for users of Windows operating systems. The software can create video format can display at once. DivX for Windows comes with additional programs such as DivX Codec, DivX Player, DivX Converter and DivX Web Player.
