High definition NTSC compatible television system with increased horizontal bandwidth and reduced colour artifacts.

摘要

A system for generating high definition television signals. An augmentation signal is provided for supporting the transmission of additional panel information, increasing the aspect of an NTSC compatible main television signal component. Line differential information, as well as high frequency luminance and high frequency chrominance are transmitted in the augmentation signal super line time interval without frequency interleaving components. The high definition augmentation signal is derived by subsampling the high definition image produced by an HDTV source along the diagonal direction of its two dimensional frequency spectrum. The horizontal frequency bandwidth of the HDTV image is preserved without an objectionable loss of resolution to the human visual system.