with doubled temporal resolution, 576p50 is considered "enhanced-definition television" (edtv), regardless of the image being scaled the same way as an interlaced frame. in some countries, such as australia, the 576p resolution standard is technically considered high-definition and was in use by the special broadcasting service (sbs tv) (16:9 the format has aspect ratio 1.468), eventually replaced by 720p for its high-definition subchannel; sbs later changed to using 1080i. the seven network initially used 576p for its high-definition subchannel, but now uses 1080i instead.