COMPATIBLE WIDESCREEN TV/WIDESCREEN TELEVISION SIGNAL PROCESSING SYSTEM WITH CENTER AND SIDE PANEL IMAGE RESOLUTION UNIFORMITY.

摘要

AN NTSC COMPATIBLE WIDESCREEN EDTV SYSTEM ENCODES AND DECODES A TELEVISION SIGNAL (N) COMPRISING (1) A MAIN, STANDARD FORMAT NTSC SIGNAL WITH AUXILIARY LOW FREQUENCY SIDE PANEL IMAGE INFORMATION COMPRESSED INTO AN OVERSCAN REGION THEREOF; (2) AUXILIARY HIGH FREQUENCY SIDE PANEL IMAGE INFORMATION (X); AND (3) AUXILIARY HIGH FREQUENCY HORIZONTAL LUMINANCE INFORMATION (Z). AT AN ENCODER, COMPONENTS 2 AND 3 ARE INTRAFRAME AVERAGED (64, 76) BEFORE MODULATING AN ALTERNATE SUBCARRIER (80). COMPONENT 1 IS INTRAFRAME AVERAGED (38) EXCLUSIVE OF THE COMPRESSED SIDE PANEL INFORMATION BEFORE BEING COMBINED (40) WITH THE MODULATED ALTERNATE SUBCARRIER. (FIG. 1)