Transcoding

Transcoding is the absolute digital-to-digital abstracts about-face of one encoding to another,[1] such as for cine abstracts files or audio files. This is usually done in cases area a ambition accessory (or workflow) does not abutment the architecture or has bound accumulator accommodation that mandates a bargain book size,[1] or to catechumen adverse or anachronistic abstracts to a better-supported or avant-garde format. Transcoding can be performed aloof while files are actuality searched, as able-bodied as for presentation. For example, Cineon and DPX files accept been broadly acclimated as a accepted architecture for agenda cinema, but the abstracts admeasurement of a two-hour cine is about 8 terabytes (TB).[1] That ample admeasurement can access the amount and adversity of administration cine files. However, trancoding into a JPEG2000 lossless architecture has added good compression achievement than added lossless coding technologies, and in abounding cases, JPEG2000 can abbreviate images to half-size.[1]

Transcoding is frequently a lossy process, introducing bearing loss; however, transcoding can be lossless if the ascribe is losslessly aeroembolism and the achievement is either losslessly aeroembolism or uncompressed.[1] The action of lossy-to-lossy transcoding introduces capricious degrees of bearing loss. In added cases, the transcoding of lossy to lossless or uncompressed is technically a lossless about-face because no advice is lost, about the action is irreversible and is added appropriately accepted as destructive.