1. A method of coding video data, the method comprising: coding a sequence of bins of a block of the video data according to a context adaptive entropy coding process having a plurality of coding cycles, wherein each coding cycle codes one bin of the sequence of bins and, wherein a current coding cycle includes: determining a context for the bin; selecting a first probability model based on the context, wherein the first probability model has been updated based on a value of a previous bin of the block coded with the context and coded at least two coding cycles prior to the current coding cycle; applying the first probability model to code the bin; and updating a second probability model based on a value of the bin.