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Digital Video and HD, 2nd Edition by Charles Poynton

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45

JPEG and motion-JPEG (M-JPEG) compression

This chapter describes JPEG, a standard for lossy compression of still images. JPEG is based upon the discrete cosine ransform (DCT). JPEG is rarely used directly in video, but it forms the basis of M-JPEG (used in desktop video editing) and DV compression. Also, JPEG techniques form the core of MPEG.

Motion-JPEG (M-JPEG) refers to the use of a JPEG- like algorithm to compress each field or frame in a sequence of video fields or frames. M-JPEG systems use the methods of JPEG, but rarely (if ever) conform to the ISO/IEC JPEG standard. DV is a specific type of M-JPEG, which is well standardized; it is described in the following chapter, DV compression, on page 505. The I-frame-only variant of MPEG-2 ...

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