Multiple history based non-adjacent MVPs for wavefront processing of video coding

A device for coding video data, the device comprising:

• a memory configured to store video data;
• and
• one or more processing units implemented in circuitry and configured to:
• code motion information for a first coding tree unit (CTU) line of a picture, the motion information for the first CTU line including first one or more motion vectors for the first CTU line;
• form first one or more prediction blocks for first one or more coding units (CUs) of the first CTU line using first reference blocks identified by the first motion information for the first CTU line;
• code first one or more residual blocks for the first one or more CUs, the first one or more residual blocks representing respective differences between the first one or more prediction blocks and the first one or more CUs;
• store the motion information for the first CTU line of the picture in a first history motion vector predictor (MVP) buffer of the memory, the motion information for the first CTU line including the first one or more motion vectors for the first CTU line for use as first motion vector predictors to predict first one or more other motion vectors of the picture;
• reset a second history MVP buffer of the memory;
• code motion information for a second CTU line of the picture, the motion information for the second CTU line including second one or more motion vectors for the second CTU line;
• form second one or more prediction blocks for second one or more CUs of the second CTU line using second reference blocks identified by the motion information for the second CTU line;
• code second one or more residual blocks for the second one or more CUs, the second one or more residual blocks representing respective differences between the second one or more prediction blocks and the second one or more CUs;
• and
• after resetting the second history MVP buffer, store the motion information for the second CTU line of the picture in the second history MVP buffer, the second CTU line being different than the first CTU line, the motion information for the second CTU line including the second one or more motion vectors for the second CTU line for use as second motion vector predictors to predict second one or more other motion vectors of the picture.

A computer-readable storage medium having stored thereon instructions that, when executed, cause a processor to:

• code motion information for a first coding tree unit (CTU) line of a picture, the motion information for the first CTU line including first one or more motion vectors for the first CTU line;
• form first one or more prediction blocks for first one or more coding units (CUs) of the first CTU line using first reference blocks identified by the motion information for the first CTU line;
• code first one or more residual blocks for the first one or more CUs, the first one or more residual blocks representing respective differences between the first one or more prediction blocks and the first one or more CUs;
• store the motion information for the first CTU line of the picture in a first history motion vector predictor (MVP) buffer of a memory, the motion information for the first CTU line including the first one or more motion vectors for the first CTU line for use as first motion vector predictors to predict first one or more other motion vectors of the picture;
• reset a second history MVP buffer of the memory;
• code motion information for a second CTU line of the picture, the motion information for the second CTU line including second one or more motion vectors for the second CTU line;
• form second one or more prediction blocks for second one or more CUs of the second CTU line using second reference blocks identified by the motion information for the second CTU line;
• code second one or more residual blocks for the second one or more CUs, the second one or more residual blocks representing respective differences between the second one or more prediction blocks and the second one or more CUs;
• and
• after resetting the second history MVP buffer, store the motion information for the second CTU line of the picture in the second history MVP buffer, the second CTU line being different than the first CTU line, the motion information for the second CTU line including the second one or more motion vectors for the second CTU line for use as second motion vector predictors.

Currently Amended):

• A device for coding video data, the device comprising:
• a memory configured to store video data;
• means for coding motion information for a first coding tree unit (CTU) line of a picture, the motion information for the first CTU line including first one or more motion vectors for the first CTU line;
• means for forming first one or more prediction blocks for first one or more coding units (CUs) of the first CTU line using first reference blocks identified by the motion information for the first CTU line;
• means for coding first one or more residual blocks for the first one or more CUs, the first one or more residual blocks representing respective differences between the first one or more prediction blocks and the first one or more CUs;
• means for storing the motion information for the first CTU line of the picture in a first history motion vector predictor (MVP) buffer of a memory, including means for storing the first one or more motion vectors for the first CTU line in the first history MVP buffer for use as first motion vector predictors to predict first one or more other motion vectors of the picture;
• means for resetting a second history MVP buffer of the memory;
• means for coding motion information for a second CTU line of the picture, the motion information for the second CTU line including second one or more motion vectors for the second CTU line;
• means for forming second one or more prediction blocks for second one or more CUs of the second CTU line using second reference blocks identified by the motion information for the second CTU line;
• means for coding second one or more residual blocks for the second one or more CUs, the second one or more residual blocks representing respective differences between the second one or more prediction blocks and the second one or more CUs;
• and
• means for storing the motion information for the second CTU line of the picture in the second history MVP buffer after resetting the second history MVP buffer, the second CTU line being different than the first CTU line, including means for storing the second one or more motion vectors for the second CTU line for use as second motion vector predictors to predict second one or more other motion vectors of the picture.