Device and method for coding and decoding keyword data

A keyword and data technology, applied in the field of encoding and decoding keyword data, which can solve problems such as difficulty in efficient encoding with high compression ratios
CN1428742AInactive Publication Date: 2003-07-09SAMSUNG ELECTRONICS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SAMSUNG ELECTRONICS CO LTD
Publication Date
2003-07-09
Estimated Expiration
Not applicable · inactive patent

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Abstract

A method and an apparatus for encoding and decoding an orientation interpolator indicating the locations of keyframes on a temporal axis and the rotation of an object in each of the keyframes are provided. The apparatus for encoding an orientation interpolator includes an break point extractor which extracts, from a first animation path constituted by an orientation interpolator input thereinto, a minimum number of break points, which can bring about an error of no greater than a predetermined error limit between the first animation path and a second animation to be generated by the extracted break points, a key data encoder which encodes key data input from the break point extractor, and a key value data encoder which encodes key value data input from the break point extractor by generating rotational differential data, by which the object is rotationally transformed by as much as a difference between a rotational transformation value of a current keyframe and a rotational transformation value of a previous keyframe.
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Description

technical field

[0001] The present invention relates to a method and apparatus for encoding and decoding key data, and in particular, to an apparatus and method for encoding key data capable of performing differential Pulse Code Modulation (DPCM) generates differential data and narrows the range of differential data to be encoded by performing predetermined operations to increase the efficiency of encoding key data, and also relates to an apparatus and method for decoding the encoded key data. Background technique

[0002] Three-dimensional (3D) representations have been widely used in computer systems for three-dimensional video games or virtual reality environments. Virtual Reality Modeling Language (VRML) is used to represent 3D animation.

[0003] The VRML and MPEG-4 binary formats for scenes (BIFS) provide a vivid representation based on keyframing. In this animation expression method, predetermined key frames are arranged on an arbitrary time axis, and animation data...

Claims

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