Some material shown on 1080i high-definition channels in the US originates from material shot on older cameras that was only capable of 1440 samples per scanline, yet this material is generally quite acceptable to most viewers and is considered high-definition. Focusing on resolution alone can be misleading. For example, a signal transmitted in its original 1920 x 1080 format, even if only having 1440 unique samples per scanline, will likely appear superior to a highly recompressed signal shown at 1440 x 1080 with a lower bitrate than the standard 19.2 Mbit/s.