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Past Discrete Cosine Transform Coding

IP.com Disclosure Number: IPCOM000037195D
Original Publication Date: 1989-Nov-01
Included in the Prior Art Database: 2005-Jan-29

Publishing Venue

IBM

Related People

Authors:
Sato, M [+details]

Abstract

Disclosed is a method to reduce the decoding time of the discrete cosine transform (DCT) coding used in database-type applications, in which real-time response is not so critical in the coding process as in the decoding process. This time shortening is realized by replacing inverse discrete cosine transforms (IDCTs) in some blocks, using the decoded signal of the preceding block and the DC component of the current block. (Image Omitted)