Offsets at sub-pixel resolution

An apparatus that encodes video data, the apparatus comprising a video encoder that:

• calculates a plurality of different DC offset values for a coded unit of the video data, wherein the plurality of different DC offset values are associated with a plurality of different integer and sub-integer pixel locations, wherein the different DC offset values include one DC offset value for integer pixel locations and several DC offset values for different sub-integer pixel locations;
• applies the DC offset values to predictive video blocks to bias the predictive video blocks according to the DC offset values and thereby generate offset predictive video blocks;
• and
• encodes video blocks of the coded unit based on the offset predictive video blocks.

An apparatus that decodes video data, the apparatus comprising a video decoder that:

• receives a plurality of different DC offset values for a coded unit of the video data, wherein the plurality of different DC offset values are associated with a plurality of different integer and sub-integer pixel locations, wherein the different DC offset values include one DC offset value for integer pixel locations and several DC offset values for different sub-integer pixel locations;
• applies the DC offset values to predictive video blocks to bias the predictive video blocks according to the DC offset values and thereby generate offset predictive video blocks;
• and
• decodes video blocks of the coded unit based on the offset predictive video blocks.

A non-transitory computer-readable medium comprising instructions that upon execution cause a device to encode video data, wherein the instructions cause the device to:

• calculate a plurality of different DC offset values for a coded unit of the video data, wherein the plurality of different DC offset values are associated with a plurality of different integer and sub-integer pixel locations, wherein the different DC offset values include one DC offset value for integer pixel locations and several DC offset values for different sub-integer pixel locations;
• apply the DC offset values to predictive video blocks to bias the predictive video blocks according to the DC offset values and thereby generate offset predictive video blocks;
• and
• encode video blocks of the coded unit based on the offset predictive video blocks.

A non-transitory computer-readable medium comprising instructions that upon execution cause a device to decode video data, wherein the instructions cause the device to:

• receive a plurality of different DC offset values for a coded unit of the video data, wherein the plurality of different DC offset values are associated with a plurality of different integer and sub-integer pixel locations;
• apply the DC offset values to predictive video blocks to bias the predictive video blocks according to the DC offset values and thereby generate offset predictive video blocks, wherein the different DC offset values include one DC offset value for integer pixel locations and several DC offset values for different sub-integer pixel locations;
• and
• decode video blocks of the coded unit based on the offset predictive video blocks.

A device that encodes video data, the device comprising:

• means for calculating a plurality of different DC offset values for a coded unit of the video data, wherein the plurality of different DC offset values are associated with a plurality of different integer and sub-integer pixel locations, wherein the different DC offset values include one DC offset value for integer pixel locations and several DC offset values for different sub-integer pixel locations;
• means for applying the DC offset values to predictive video blocks to bias the predictive video blocks according to the DC offset values and thereby generate offset predictive video blocks;
• and
• means for encoding video blocks of the coded unit based on the offset predictive video blocks.

A device that decodes video data, the device comprising:

• means for receiving a plurality of different DC offset values for a coded unit of the video data, wherein the plurality of different DC offset values are associated with a plurality of different integer and sub-integer pixel locations;
• means for applying the DC offset values to predictive video blocks to bias the predictive video blocks according to the DC offset values and thereby generate offset predictive video blocks, wherein the different DC offset values include one DC offset value for integer pixel locations and several DC offset values for different sub-integer pixel locations;
• and
• means for decoding video blocks of the coded unit based on the offset predictive video blocks.