Strategies for HD operation

摘要

During this time of transition from NTSC analog service to full-power DTV transmission, local stations have employed a handful of strategies to deliver HDTV to a relatively small but growing number of viewers with HD receivers and monitors. As of the end of 2004, there were more than 12 million DTV households, according to a Jan. 13 FCC report. There were also more than 1400 television stations broadcast- ing DTV signals and more than 90 million cable households passed by HDTV service.