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Coding and decoding method and device for key value data to directed interprolator node

A key value and interpolator technology, applied in image coding, image data processing, instruments, etc., can solve the problem of not reflecting the redundancy of rotation transformation well

Inactive Publication Date: 2003-07-09
SAMSUNG ELECTRONICS CO LTD
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Problems solved by technology

However, as in MPEG4 BIFS, if the key value data is represented by the quaternion of equation (3), and the difference is calculated linearly by calculating the difference in the vector between consecutive key value data, the difference is not 0, which means that the linear difference does not reflect the redundancy in the rotation transformation well
Therefore, it is impossible to accurately estimate the image quality using the method shown in equation (1) for estimating the degree of image distortion

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  • Coding and decoding method and device for key value data to directed interprolator node
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  • Coding and decoding method and device for key value data to directed interprolator node

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[0046] The present invention will be described more fully below with reference to the accompanying drawings showing preferred embodiments of the invention.

[0047] Fig. 3A is a block diagram of an apparatus for encoding key value data of a directional interpolator node according to the first embodiment of the present invention. According to FIG. 3A, the apparatus for encoding key value data of a directional interpolator node according to the first embodiment of the present invention includes a rotation DPCM operator 300, a circular DPCM operator 400, an entropy encoder 450, and a key value header encoder 500. The rotation DPCM operator 300 calculates the rotation difference between the rotation transformation values ​​of the object in consecutive key frames, quantizes the rotation difference, and then outputs the rotation difference data, wherein the rotation transformation value is obtained by converting the key frame Quaternion key value data is obtained by applying it to ...

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Abstract

A method and an apparatus for encoding key value data of an orientation interpolator representing the rotation of an object in a keyframe image are provided. The apparatus includes a rotational differential data generator which generates, using a rotational transformation value of a current keyframe and a restored rotational transformation value of a previous keyframe, a rotational differential value used to rotate the object by as much as a difference between rotational transformation applied to the object in the current keyframe by key value data and rotational transformation applied to the object in the previous keyframe by key value data, and outputs rotational differential data by quantizing the rotational differential value, a circular DPCM operator which selectively performs a linear DPCM operation or a circular DPCM operation on rotational differential data, and an entropy encoder which entropy-encodes the rotational differential data.

Description

technical field [0001] The present invention relates to a method and a device for encoding and decoding key value data of an animation, in particular to a method and a device for encoding and decoding key value data of a directional interpolator node. The difference between the object's orientation transformation values ​​is encoded and decoded, transforming the key value data into a quaternion. Background technique [0002] MPEG-4 BIFS, one of the international multimedia standards, supports keyframe-based animation using interpolator nodes with animation keys and key values. [0003] In order to display animation as naturally and smoothly as possible with the above-mentioned key frame-based animation technology, a large amount of keyword and key value data are required, and field data between key frames are filled by interpolation. Interpolation in Virtual Reality Modeling Language (VRML) includes linear or spherical interpolation. [0004] Keywords and keyvalues ​​appro...

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Application Information

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IPC IPC(8): G06T9/00G06T13/20H03M7/30H03M7/40H04N7/26
CPCH03M7/40H04N19/00406H04N19/00884H03M7/30H04N19/00078H04N7/26106H04N19/00096H04N19/00157H04N19/00139H04N19/00018H04N19/00545H04N19/70H04N19/46H04N19/103H04N19/12H04N19/126H04N19/136H04N19/14H04N19/25
Inventor 金道均郑锡润张义善禹相玉李信俊韩万镇张敬子
Owner SAMSUNG ELECTRONICS CO LTD
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