Video Compression Algorithms

Modern video compression algorithms arent the same as the image compression algorithms you might be familiar with.

Video compression algorithms. Video compression is performed through a video codec that works on one or more compression algorithms. The digital storage media for the purpose of this standard include digital audio tape dat cd rom writeable optical disks magnetic tapes and magnetic disks as well as communications channels for local and wide area networks lans and wans respectively. Usually video compression is done by removing repetitive images sounds andor scenes from a video.

Interframe compression is the main reason we have digital tv and web video at all. Audio data compression not to be confused with dynamic range compression has the potential to reduce the transmission bandwidth and storage requirements of audio data. A video coding format or sometimes video compression format is a content representation format for storage or transmission of digital video content such as in a data file or bitstreamit typically uses a standardized video compression algorithm most commonly based on discrete cosine transform dct coding and motion compensationexamples of video coding formats include h262 mpeg 2 part.

Standardization of compression algorithms for video was first initiated by ccitt for teleconferencing and video telephony. Video works a bit differently from images. For example a video may have the same background.

Manipulation software which often includes the jpeg compression algorithm in software form as part of a graphics illustration or video editing package. In this work we computed the compression rate on different video files by applying both algorithms. Audio compression algorithms are implemented in software as audio codecsin both lossy and lossless compression information redundancy is reduced using methods such as coding quantization discrete cosine transform and.

Experimentally we find that ac algorithm compressed better in almost all types of video files except dat type video file and we also find that the compression rate of dat file is highest and rle performed better in it. H261 allows for use with communication channels that are multiples of 64 kbps p12330 the same data structure as isdn. A lot of space gets saved because the compression algorithm doesnt need to store all the stuff in the scene that doesnt change.