a data processing system for the compression and decompression of data using differential pulse code modulation , and optimized for fast execution using a parallel processing dsp such as the texas instruments tms320c8x family . decompression is speeded up over the methods known in the art by combining the vlc codes and the additional interval bits into one code , which is then used as an index into a look up table that yields the final result in one step instead of the multiple operations required by current implementations .