Performance limitations of data-reduced HDTV magnetic tape recording systems

Discusses magnetic tape recording for HDTV studios and describes DCT (discrete cosine transform) codecs for digital video recording. Block diagrams of data reduction systems are presented, and the use of spectral analysis ahead of variable length coding is described. Advantages are suggested over normal PCM and results of multiple copying are reported, showing both subjective tests and chromakey tests. Data compression by a factor of 2 to 3 yields acceptable quality.