"MPressionist HDTV for Macintosh OS X (BSD unix-based) workstations, is a diagnostic testing and analysis tool for HDV/DTV/DVB device designers, and quality assurance, broadcast and software engineers working with standard (SD) and high-definition (HD) MPEG-2 bitstreams. The product, in it's third major revision, combines bitstream syntax analysis, bitstream standards conformance, encoder performance feedback, statistical bitrate/compression diagnostics and comparative picture analysis tools into a highly visual and intuitive environment designed to increase engineering productivity by linking the engineer's technical expertise and MPEG knowhow with the bitstream syntax and actual moving picture frames. The toolset, which combines a demultiplexing/analysis preprocessing pass with true random access to the bitstream, makes it possible to understand and visualize all aspects of compressed MPEG-2 video, including the spatial/visual, statistical and syntatical elements. "

"MPressionst Pro HD for Macintosh, unveils new tools for both high (HD) and standard (SD) definition MPEG-2 (standard DVD and HD-DVD); providing statistical, comparative picture quality and bitstream analysis. Long used by scientists working in the field of image and video compression, the frame-difference analysis features of MPressionist Pro HD make a more reliable and scientific approach to DVD picture quality possible. In addition to 'per-pixel difference/delta' analysis, the comparative features of version 3.0 also includes side-by-side split monitor analysis for comparing the actual moving picture. And not only can you compare the source material with a compressed version, you can also bring up two different compressed movies and perform a subjective left/right comparision by watching (in sync). Remarkably useful for determining if compressing a movie with a reduced bitrate has significantly impacted picture quality. You can even compare movies compressed with different codecs (such as HD-DVD H.264 and MPEG-2). Again, for DVD authoring professionals attempting to make informed production decisions (for instance, whether to replicate DVD-5 vs a dual-layer format), the tools in MPressionist provide the objective information required to make a good decision in an easy to understand visual format.