Two-dimensional speech compression

The application of recent video data compression techniques to speech data is described. In order to effectively apply these techniques, the speech data should be segmented so as to achieve a high degree of correlation between corresponding samples in adjacent speech segments, allowing the formation of a two-dimensional speech "raster" with significant correlation in both dimensions. Several methods for generating such two-dimensional formats are proposed, and the results of applying the hybrid cosine-transform/DPCM compression algorithm [1] and the two-dimensional cosine transform to selected data formats are presented. Also proposed are several hardware configurations for the possible application of these results to narrowband speech processing.