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Multimedia compression is a general term referring to the compression of any type of multimedia, most notably graphics, audio, and video. |
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Multimedia compression is a general term referring to the compression? of any type of multimedia, most notably graphics, audio, and video. |
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Traditional compression algorithms tend to do a poor job compressing multimedia. Multimedia compression has become the primary focus of compression research. Multimedia compression algorithms are traditionally known as codecs. |
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Because multimedia typically derives from data sampled by a device such as a camera? or a microphone?, and because such data contains large amounts of random noise, traditional lossless compression algorithms tend to do a poor job compressing multimedia. Multimedia compression algorithms, traditionally known as codecs, work in a lossy fashion: #Transform the data according to a model designed to reduce sample-to-sample correlation, concentrating the important signal in a few data values. #Quantize the data, most of which has become noise. Some codecs use a scalar quantizer followed by run-length encoding; others use [vector quantization]?. #Use [entropy coding]? such as Huffman coding to reduce the number of bits that the most common values use. |
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As opposed to traditional compression, multimedia compression is usually lossy. |
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Multimedia compression has become the primary focus of compression research, primarily in a search for more efficient models. See also: Digital signal processing |
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