Patent ID: 6751256
Filing Date: 2004-06-15
Classification: H04N

Abstract:
A method for HDTV and NTSC compatible image processing comprising:obtaining luminance and chrominance image data of a scene to be transmitted; quantizing and digitally encoding the image data to form digital image data in HDTV transmission format having low-resolution terms and high-resolution terms; transforming the low-resolution digital image data terms to a voltage signal corresponding to NTSC color subcarrier modulation with retrace blanking and color bursts added to form a NTSC video signal; transmitting the NTSC video signal and the high-resolution digital image data terms in a composite NTSC video transmission; in a NTSC receiver, processing the NTSC video signal directly to display the scene; in a HDTV receiver, processing the NTSC video signal to invert the color subcarrier modulation to recover the low-resolution terms, combining the recovered low-resolution terms with the high-resolution terms, and reconstructing the scene in a high definition format.