ABSTRACT
The Advanced Television Systems Committee (ATSC) digital television (DTV) standard has ushered in a new era in television broadcasting. The impact of DTV is more significant than simply moving from an analog system to a digital system; rather, DTV permits a level of flexibility wholly unattainable with analog broadcasting. An important element of this flexibility is the ability to expand system functions by building upon the technical foundations specified in ATSC standards such as the ATSC Digital Television Standard (A/53) [1] and the Digital Audio Compression (AC-3) Standard (A/52) [2].
