A compact code for representing floorplans

A new compact code called EQ-sequence for representing a floorplan is presented. A floorplan decides the placement of modules in VLSI design. The EQ-sequence is developed from Q-sequence and it can preserve the adjacent relationships of rooms on a floorplan, but the Q-sequence cannot. The algorithms for encoding, moving and decoding of EQ-sequences are introduced, respectively. By the EQ-sequence, we can check whether two modules abut or not on a floorplan. It has been proved that any floorplan of n rooms is uniquely encoded by an EQ-sequence and any EQ-sequence is uniquely decoded to a floorplan, both are in O(n) time.