Data structure for video coding unit

A device for coding video data, comprising:

• a local memory buffer configured to store a data structure providing a reference for use during coding a picture, the data structure having first data elements arranged in a one-to-one manner with all data elements of to a first portion of the picture, the first data elements including data related to all smallest prediction units (PUs) for the first portion of the picture and defining a periphery;
• and
• a processor operably coupled to the local memory buffer and configured to:
• increase a size of the data structure in the local memory buffer, comprising adding a plurality of extended units along the entire periphery of the first data elements, each extended unit of the plurality of extended units having data related to the PUs of the first portion of a picture;
• set each extended unit of the plurality of extended units and the first plurality of data elements to default values;
• generate a syntax element indicating coded video information related to the first portion of a picture based on the data structure;
• and
• code a block based on the generated syntax element for the first portion of a picture based on the data structure.

A method of coding video data in a portion of a picture, comprising:

• storing, by one or more processors, data related to each prediction unit (PU) of a first plurality of PUs in a data structure in a local memory buffer coupled to the processor, the data structure having a size of a coding tree unit (CTU) in a picture to be coded;
• storing, by the one or more processors, extended data for each extended unit of a plurality of extended units disposed along the entire periphery of the first plurality of PUs in the data structure;
• generating a first syntax element indicating coded video information related to a first CTU based on the data structure;
• coding, by the one or more processors, a first block based on the first syntax element;
• updating a left-most column of the plurality of extended units in the data structure with data related to a right-most column of PUs of the first CTU to form a first updated data structure;
• generating, by the one or more processors, a second syntax element indicating coded video information related to a second CTU based on the first updated data structure;
• and
• coding, by the one or more processors, a second block based on the second syntax element.

A device for coding video data, comprising:

• a local memory buffer configured to
• store a data structure, the data structure having data related to each prediction unit (PU) of a first plurality of PUs, the data structure further having a size of a coding tree unit (CTU) in a picture to be coded, and
• store extended data for each extended unit of a plurality of extended units disposed along the entire periphery of the first plurality of PUs in the data structure;
• and
• a processor operably coupled to the local memory buffer and configured to
• generate a first syntax element indicating coded video information related to a first CTU based on the data structure,
• code a first block based on the first syntax element,
• update a left-most column of the plurality of extended units in the data structure with data related to a right-most column of PUs of the first CTU to form a first updated data structure,
• generating a second syntax element indicating coded video information related to a second CTU based on the first updated data structure;
• and
• code a second block based on the second syntax element.