Patent ID: 7181071

Claim:
An apparatus for generating rotational differential data, which generates differential data of rotational transformation values representing the rotation of an object in each frame, the apparatus comprising: a first quaternion multiplier which generates a rotational differential value used to rotate an object by as much as a difference between rotational transformation applied to the object in a current keyframe by a rotational transformation value of the current frame and rotational transformation applied to the object in a previous keyframe by a restored rotational transformation value of the previous frame; a quantization unit which generates rotational differential data by quantizing the rotational differential value; an inverse quantization unit which generates a restored rotational differential value by inversely quantizing the rotational differential data; and a second quaternion multiplier which generates a restored rotational transformation value of the current frame by quaternion-multiplying the restored rotational differential value by a rotational transformation value of the previous frame.