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High Efficiency Video Coding tiers and levels
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<p> High Efficiency Video Coding tiers and levels are constraints that define a <a href="/facts/High_Efficiency_Video_Coding/6gp7DC1a">High Efficiency Video Coding</a> (HEVC) bitstream in terms of maximum bit rate, maximum luma sample rate, maximum luma picture size, minimum compression ratio, maximum number of slices allowed, and maximum number of tiles allowed. Lower tiers are more constrained than higher tiers and lower levels are more constrained than higher levels. </p>