A Rapid Flow Of Images Is Referred To As H.264 Defined

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H.264 Defined

Video signals can require enormous capacity for transport and storage. For these reasons, video signals are almost always processed to reduce the signal size. This is called “Video Signal Compression” (VSC).

Video is a series of still images called frames, which, if viewed at a high enough rate, give the illusion of motion. VSC achieves high compression rates by saving only the transitions from one frame to another instead of saving each full frame. With a well-designed computer program, compression can be achieved with very little distortion.

Satellite TV companies “The Dish Network” and “Directive” were pioneers in the use of signal compression. These companies used a standard called MPEG-2 (MPEG is short for “Motion Pictures Expert Group”). Without these techniques, only a fraction of the currently possible channels can be managed by existing satellite systems.

Compression is also applied to audio signals. For example “MP3” is an abbreviation for “MPEG Audio Layer 3”, which is part of the audio/video compression program. The MP3 player phenomenon would never have happened with signal compression.

MPEG-4 is one of the newer compression methods, specifically designed for efficient video signal compression. MPEG-4 was originally developed for transporting video signals over the Internet, but has found widespread success with HDTV signals. DivX is an example of an MPEG-4 encoder.

Sony was the first company to gain commercial recognition H.264 (also known as MPEG-4 Part 10), a more advanced revision of MPEG-4. Blu-ray DVD, for example, uses the H.264 standard for storage. This standard has also gained rapid acceptance in the security camera industry. H.264 is 2-3 times more efficient than the MPEG-2 standard.

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