LZW Decompression Using a Reverse Order Stack

The patent inverts the traditional push-down stack approach by using a stack that outputs values in the correct order rather than reversed order. Instead of pushing symbols onto a stack and then popping them off in reverse sequence, the system uses a stack structure that maintains the correct sequential order of decoded values, eliminating the need for post-decompression transformation operations.

The system performs preliminary action by pre-organizing the stack structure to output values in the correct order from the beginning of the decompression process. Rather than allowing values to be stored in reverse order and then transforming them later, the stack is designed upfront to maintain correct sequencing, so that no additional transformation time is needed.

The patent applies asymmetry by using a non-standard stack filling approach where the stack is filled in reverse order starting at the last memory address rather than the conventional first-to-last approach. This asymmetric memory management strategy allows the stack to naturally output values in the correct sequential order, trading unconventional memory access patterns for elimination of transformation operations.