Main Level
Main Level – A range of allowed picture parameters defined by the MPEG-2 video coding specification with maximum resolution equivalent to ITU-R Recommendation 601. MPEG-2 standard has four level which define the resolution of the picture, ranging from SIF to HDTV and five profiles which determine the set of compression tools used. The four levels can be described as: 1. Low Level: SIF resolution used in MPEG-1 (up to 360 x 288 pixels) 2. Main Level: Using 4:2:0 standard (720 x 576 pixels) 3. High 1440 Level: Aimed at HDTV (up to 1440 x 1152 pixels) 4. High Level: Wide screen HDTV (up to 1920 x 1152 pixels)
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