Title :
A fast motion estimation algorithm for DV to MPEG-2 conversion
Author :
Kato, H. ; Yanagihara, H. ; Nakajima, Y. ; Hatori, Y.
Author_Institution :
KDDI R&D Labs. Inc., Saitama, Japan
Abstract :
A fast motion estimation algorithm for digital video (DV) to MPEG-2 conversion is described. Since DCT information is available from DV data and 2/spl times/2 IDCT can be achieved by simple summation and subtraction operations, a low-resolution image is constructed and used for a coarse motion search. Then a fine search is performed using an extended two step search in the original image domain. The experimental results show that the proposed method is more than 160 times faster than the full search whereas the PSNR and search speed are greatly improved when compared with the conventional method.
Keywords :
discrete cosine transforms; image resolution; motion estimation; search problems; video coding; DCT; MPEG-2; PSNR; coarse motion search; digital video; extended two step search; image domain; low-resolution image; motion estimation algorithm; Broadcasting; Discrete cosine transforms; Image converters; Laboratories; Motion estimation; PSNR; Quantization; Research and development; Transform coding; Video equipment;
Conference_Titel :
Consumer Electronics, 2002. ICCE. 2002 Digest of Technical Papers. International Conference on
Conference_Location :
Los Angeles, CA, USA
Print_ISBN :
0-7803-7300-6
DOI :
10.1109/ICCE.2002.1013964
