With the standard three channels of NASA TV streaming, plus the Space Station views stream, we were broadcasting eight unique feeds of video at one time, another first.
Many of them don't want to sign up to HD broadcasting services, as adverts are shown on standard definition broadcasts, so they can't see the difference.
而且很多人不定购高清频道服务是因为在高清节目里的广告是在普通清晰度的节目中播出。
3
Broadcasting systems with other standards will be forced to embrace the standard system after the promotion year ends.