DEVICE FOR DETERMINING LENGTH OF VARIABLE LENGTH ENCODED DATA, DEVICE OF DECODING DATA STREAM OF VARIABLE LENGTH ENCODED DATA, AND METHOD OF DETERMINING LENGTH OF VARIABLE LENGTH ENCODED DATA

PROBLEM TO BE SOLVED: To determine in 1 clock cycle lengths of a plurality of variable length coded data values involved in a data stream. SOLUTION: The device comprises: a shift means 206 for transmitting one subset among a plurality of variable length coded data values; a first length decoding means 210 for determining the length of a first data value among a plurality of data values in a subset; a second length decoding means 212 for individually determining the length of a second data value, wherein it continues immediately after the first coded data value in the subset and decoding operations are simultaneously performed; a decoding means for outputting the length of a combination of both data values in response to the lengths of the first and the second data values; and means 218, 222, 234 and 236 each forming a shift control signal 235 in response to the length of the combination, and then identifying the position of the decoded data value, the next coded data value continuing immediately after the second coded value, and transmitting the shift control signal to the shift means 206. COPYRIGHT: (C)2006,JPO&NCIPI