Spherical rotation for encoding wide view video

A system comprising:

• memory;
• at least one sensor;
• a display;
• a storage device;
• communication circuitry;
• and
• at least one processor to:
• generate a sphere rotation supplemental enhancement information message associated with a video, the sphere rotation supplemental enhancement information message includes information on rotation angles yaw (α), pitch (β), and roll (γ) that are used for conversion between global coordinate axes and local coordinate axes, wherein roll corresponds to a rotation around an x-axis, pitch corresponds to a rotation around a y-axis, and yaw corresponds to a rotation around a z-axis, the sphere rotation supplemental enhancement information message includes:
• sphere_rotation_cancel_flag, wherein the sphere_rotation_cancel_flag equals to 1 indicates that the sphere rotation supplemental enhancement information message cancels persistence of any previous sphere rotation supplemental enhancement information message;
• sphere_rotation_persistence_flag, the sphere_rotation_persistence_flag specifies persistence of the sphere rotation supplemental enhancement information message for a current layer, wherein the sphere_rotation_persistence_flag equals to 0 to specifies that the sphere rotation supplemental enhancement information message applies to a current decoded picture only, wherein the sphere_rotation_persistence_flag equals to 1 specifies that the sphere rotation supplemental enhancement information message applies persists for the current layer until one or more conditions are met, and
• at least one of:
• yaw_rotation, wherein yaw_rotation specifies the value of the yaw rotation angle, wherein a 0 for yaw_rotation indicates that there is no yaw rotation,
• pitch rotation, wherein pitch rotation specifies the value of the pitch rotation angle, wherein a 0 indicates that there is no pitch rotation, or
• roll_rotation, wherein roll_rotation specifies the value of the roll rotation angle, wherein a 0 for roll_rotation indicates that there is no roll rotation.

An encoder comprising:

• first means for generating a sphere rotation supplemental enhancement information message associated with a video, the sphere rotation supplemental enhancement information message includes information on rotation angles yaw (α), pitch (β), and roll (γ) that are used for conversion between global coordinate axes and local coordinate axes, wherein roll corresponds to a rotation around an x-axis, pitch corresponds to a rotation around a y-axis, and yaw corresponds to a rotation around a z-axis, the sphere rotation supplemental enhancement information message includes:
• sphere_rotation_cancel_flag, wherein the sphere_rotation_cancel_flag equals to 1 indicates that the sphere rotation supplemental enhancement information message cancels persistence of any previous sphere rotation supplemental enhancement information message;
• sphere_rotation_persistence_flag, the sphere_rotation_persistence_flag specifies persistence of the sphere rotation supplemental enhancement information message for a current layer, wherein the
• sphere_rotation_persistence_flag equals to 0 to specifies that the sphere rotation supplemental enhancement information message applies to a current decoded picture only, wherein the sphere_rotation_persistence_flag equals to 1 specifies that the sphere rotation supplemental enhancement information message applies persists for the current layer until one or more conditions are met, and
• at least one of:
• yaw_rotation, wherein yaw_rotation specifies the value of the yaw rotation angle, wherein a 0 for yaw_rotation indicates that there is no yaw rotation,
• pitch_rotation, wherein pitch_rotation specifies the value of the pitch rotation angle, wherein a 0 indicates that there is no pitch rotation, or
• roll_rotation, wherein roll rotation specifies the value of the roll rotation angle, wherein a 0 for roll_rotation indicates that there is no roll rotation;
• and
• second means for outputting the sphere rotation supplemental enhancement information message.