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MPEG-1

   Also found in: Wikipedia 0.01 sec.
(compression, standard, algorithm, file format)MPEG-1 - The first MPEG format for compressed video, optimised for CD-ROM. MPEG-1 was designed for the transmission rates of about 1.5 Mbps achievable with Video-CD and CD-i.

It uses discrete cosine transform (DCT) and Huffman coding to remove spatially redundant data within a frame and block-based motion compensated prediction (MCP) to remove data which is temporally redundant between frames. Audio is compressed using subband encoding. These algorithms allow better than VHS quality video and almost CD quality audio to be compressed onto and streamed off a single speed (1x) CD-ROM drive.

MPEG encoding can introduce blockiness, colour bleed and shimmering effects on video and lack of detail and quantisation effects on audio.

The official name of MPEG-1 is International Standard IS-11172.
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Operating on top of any core audio codec such as AAC, HE-AAC and MPEG-1 Layer II, the system provides an unrivalled set of features including full backward compatibility to stereo equipment and a wide scalability in terms of bit rate used for describing the surround sound image.
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