ABSTRACT
The theory of Widescreen 525 is relatively simple. So, too, is its implementation, although there are specific considerations that must be given to different types of equipment. There are two ways to approach Widescreen 525 implementation. One is to design and build new equipment specifically for the purpose. The other is to modify existing 4:3 equipment to permit widescreen operation. The sampling rate issue has a significant impact on all the other factors in the implementation of Widescreen 525. If the resolution of current 13.5 MHz sampling is to be maintained in the widescreen mode, then the sampling rate must be stepped up to 18 MHz. This offers the possibility to deliver to viewers over 1/3 more resolution than NTSC does today when Compressed Digital Video (CDV) delivery systems are in place in cable and direct broadcast satellite (DBS) operations in a few years. Digital distribution and routing can use either parallel or serial interconnections.
