VLD SUBTRACT METHOD OF POSITION INFORMATION

摘要

The method for contracting variable length code according to position information that if a zero length and a discrete cosine transform value are not recorded at a variable length code table, an escape coder, the zero length and the discrete cosine transform coefficient are all added to assign a new code is characterized in that the zero length representing the number of "0" is coded by selectively changing the number of the bits according to the zig-zag scanning sequence position of the right-before-coded variable length code.