At least a method and an apparatus are presented for improving parallelization for wavefront parallel encoding and decoding of luma and chroma components of a vide picture. For example, a luma component and a chroma component of a video picture are independently subdivided into respectively a plurality of luma coding units and a plurality of chroma coding units. A context-based adaptive binary coding context variable is propagated from a previous row to a current row of the independently subdivided plurality of luma coding units, and a context-based adaptive binary coding context variable is propagated from a previous row to a current row of the independently subdivided plurality of chroma coding units. The video picture is encoded or decoded using the propagations to provide the wavefront parallel processing.
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