1. A system for coding, the system comprising: a processor configured to prepare video compression data based on source pictures, the preparing including partitioning the source pictures into coding units, generating at least one transform unit having a transform array including transform coefficients assigned as entries to y-x locations of the transform array, based on residual measures associated with the coding units, and processing the generated transform unit, the processing including generating a significance map, having a significance map array with y-x locations corresponding to the y-x locations of the transform array, scanning, utilizing a zigzag scanning pattern, a plurality of significance map elements in the significance map array, and determining, utilizing the zigzag scanning pattern, a context model for coding a significance map element of the plurality of significance map elements based on a value associated with at least one coded neighbor significance map element of the significance map element in the significance map array.