The invention relates to a coupled treatment on the entropy decode and convert product line, wherein said method comprises: in the changed product line, after completing the conversation of entropy decode factor of one processing unit, clearing said entropy decode factor buffer area; at the same time, the entropy decode product line step decodes the non-zero factor of next processing unit from the video code flow and writes cleared entropy decode factor buffer area. The invention can combine the entropy decode and conversation; in the product line step, it processes parallel clear on the decode buffer of entropy decode, to reduce needed clock periods, and increase the throughout of whole product line. |