Compression speed ~= Decompression speed. (around 200-300 MB/s) CPU notes: LZZQ uses 32KB dictionary, reduce to 16KB (change HASH_SIZE to 4*1024) for good L1 cache access (with little reduction in ratio).

Abstract— We propose a simple speech compression algorithm using subband division and ADPCM (Adaptive Differential Pulse Code Modulation) algorithm. Although speech data are stored in a semiconductor memory device, its capacity and the availa