Image processing apparatus and method
The image processing apparatus according to the present disclosure includes a smallest coding unit information obtaining unit that, while a coding unit having a multilayer structure in which a picture of image data is divided into a plurality of pieces is set as a processing unit, in a decoding of coded data obtained by coding the image data, obtains information indicating a size of a smallest coding unit corresponding to the coding unit that is smallest, and a control information obtaining unit that obtains control information for controlling a smallest size of an inter prediction unit corresponding to a processing unit of an inter prediction in accordance with the size of the smallest coding unit indicated by the information obtained by the smallest coding unit information obtaining unit.
1. An image processing apparatus, comprising:
a control information obtaining unit configured to obtain control information to control a smallest size of an inter prediction unit corresponding to a first processing unit of an inter prediction, wherein the control information is obtained based on:
a coding unit which comprises a multilayer structure in which a picture is divided into a plurality of pieces, wherein the coding unit is set as a second processing unit before the inter prediction, and
an encoded picture of the picture, wherein
the control information indicates a permission status for an N×N block size with respect to a 2N×2N block size of a smallest coding unit;
a setting unit configured to:
set one of a 2N×N block size or an N×2N block size as the smallest size of the inter prediction unit based on the permission status that indicates the N×N block size is prohibited as the smallest size of the inter prediction unit; and
set the N×N block size as the smallest size of the inter prediction unit based on the permission status that indicates the N×N block size is permitted as the smallest size of the inter prediction unit; and
a motion prediction and compensation unit configured to set the inter prediction unit to a size larger than the set smallest size for execution of the inter prediction.
2. An image processing method, comprising:
in an image processing apparatus:
obtaining control information for controlling a smallest size of an inter prediction unit that corresponds to a first processing unit of an inter prediction, wherein the control information is obtained based on:
a coding unit which comprises a multilayer structure in which a picture is divided into a plurality of pieces, wherein the coding unit is set as a second processing unit before the inter prediction, and
an encoded picture of the picture, wherein
the control information indicates a permission status for an N×N block size with respect to a 2N×2N block size of a smallest coding unit;
setting one of a 2N×N block size or an N×2N block size as the smallest size of the inter prediction unit based on the permission status that indicates the N×N block size is prohibited as the smallest size of the inter prediction unit;
setting the N×N block size as the smallest size of the inter prediction unit based on the permission status that indicates the N×N block size is permitted as the smallest size of the inter prediction unit; and
setting the inter prediction unit to a size larger than the set smallest size for executing the inter prediction.
3. An image processing method, comprising:
setting, by a control information setting unit, control information for controlling a smallest size of an inter prediction unit corresponding to a first processing unit of an inter prediction, wherein
the setting is based on a coding unit, which comprises a multilayer structure in which a picture is divided into a plurality of pieces,
the coding unit is set as a second processing unit before the inter prediction, and
the control information indicates a permission status for an N×N block size with respect to a 2N×2N block size of a smallest coding unit;
setting one of a 2N×N block size or an N×2N block size as the smallest size of the inter prediction unit based on the permission status that indicates the N×N block size is prohibited as the smallest size of the inter prediction unit;
setting the N×N block size as the smallest size of the inter prediction unit based on the permission status that indicates the N×N block size is permitted as the smallest size of the inter prediction unit;
transmitting, by a transmission unit, the set control information for the inter prediction; and
setting the inter prediction unit to a size larger than the smallest size for executing the inter prediction.
4. The image processing apparatus according to claim 1 , wherein the control information is based on one of user setting information, hardware performance information, or profile level information.