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

摘要

PROBLEM TO BE SOLVED: To determine the length of plural variable length encoded data values within one clock by forming a shift signal in response to the length of combination of 1st and 2nd data values, identifying the positions of encoded data values and transmitting a shift control signal to a shift means. SOLUTION: A 1st length decoder 210 determines a length 213 of 1st data among plural encoded data values through 1st decoding operation. A 2nd length decoding means 212 determines the length of 2nd data values continued just after the 1st encoded data values by receiving the plural encoded data values from a shifter/multiplexer 206 and performs 2nd decoding operation. A shift controller provided with blocks 218, 222, 234 and 236 prepares a shift control signal 235 to be used for determining which one of plural encoded data values is to be transmitted to the 1st and 2nd length decoding means and transmits this signal to the shifter 206.