Title :
Joint optimization of block size and quantization for quadtree-based motion estimation
Author_Institution :
Sarnoff Corp., Princeton, NJ, USA
fDate :
6/1/1998 12:00:00 AM
Abstract :
A new approach to finding the best block size for quadtree-based motion estimation is developed and compared to a conventional fixed block size algorithm. The optimal balance between the motion vector bits and the discrete cosine transform (DCT) coefficient bits is achieved by a fast tree optimization technique based on Lagrange multiplier
Keywords :
coding errors; discrete cosine transforms; motion estimation; optimisation; quadtrees; quantisation (signal); transform coding; variable length codes; video coding; DCT coefficient bits; Lagrange multiplier; block size optimization; discrete cosine transform; fast tree optimization; fixed block size algorithm; low bit rate coding; motion vector bits; quadtree-based motion estimation; quantization; residual error coding; variable length coding; video coding; Algorithm design and analysis; Bit rate; Decoding; Discrete cosine transforms; Image coding; Lagrangian functions; Motion estimation; Quantization; Rate-distortion; Video coding;
Journal_Title :
Image Processing, IEEE Transactions on
