Apparatus for decoding a bitstrom with an orientation interpolator

摘要

An apparatus for decoding an orientation interpolator indicating the locations of keyframes on a temporal axis and the rotation of an object in each of the keyframes is provided which comprises a key data decoder, a key value decoder, and an orientation interpolator synthesizer which generates an orientation interpolator by synthesizing the decoded key data and the key value data which is spherically linear-interpolated using the decoded key data and the decoded key value data.
The key data decoder can comprise an entropy decoder which generates differential data by entropy-decoding the bitstream, and an inverse circular DPCM processor which generates quantized key data by performing inverse circular-DND operation.
When there is no decoded key value data corresponding to key data currently being subjected to orientation interpolator synthesization, the orientation interpolator synthesizer interpolates key value data corresponding to the key data currently being subjected to orientation interpolator synthesization using decoded key value data corresponding to previously synthesized key data and decoded key value data corresponding to key data to be synthesized next.