Patent ID: 6345123
Filing Date: 2002-02-05
Classification: H03M,H04N

Abstract:
An image decoding method for extracting a variable length code from compression coded data, comprising obtaining an event corresponding to said variable length code by using a variable length code table wherein a reference event consisting of Last, Run, and Level, is assigned to each reference variable code, and deriving an output transform coefficient from said event, the method further comprising:obtaining an event corresponding to said variable length code by using said variable length code table when said variable length code does not include a control code, obtaining an event corresponding to said variable length code by using said variable length code table and then obtaining a transformed event by tranforming the Level value of said event corresponding to said variable length code using a predetermined function when said variable length code includes said control code followed by a second mode code, and wherein the control code is â€œ0000011â€  and the second mode is â€œ0â€ .