SIGNALING QUANTIZATION PARAMETER CHANGES FOR CODED UNITS IN HIGH EFFICIENCY VIDEO CODING (HEVC)

摘要

IN ONE EXAMPLE, THIS DISCLOSURE DESCRIBES A METHOD OF DECODING VIDEO DATA. THE METHOD COMPRISES RECEIVING A CODING UNIT (CU) OF ENCODED VIDEO DATA. THE CU IS PARTITIONED INTO A SET OF BLOCK-SIZED CODED UNITS (CUS) ACCORDING TO A QUADTREE PARTITIONING SCHEME, AND DECODING ONE OR MORE SYNTAX ELEMENTS FOR THE CU TO INDICATE A CHANGE IN A QUANTIZATION PARAMETER FOR THE CU RELATIVE TO A PREDICTED QUANTIZATION PARAMETER FOR THE CU ONLY IF THE CU INCLUDES ANY NON-ZERO TRANSFORM COEFFICIENTS. THE ONE OR MORE SYNTAX ELEMENTS ARE DECODED FROM A POSITION WITHIN THE ENCODED VIDEO DATA AFTER AN INDICATION THAT THE CU WILL INCLUDE AT LEAST SOME NON-ZERO TRANSFORM COEFFICIENTS, AND BEFORE THE TRANSFORM COEFFICIENTS FOR THE CU. FIGURE 5