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ÇѱÛÁ¦¸ñ(Korean Title) |
H.264/AVC¿¡¼ È¿À²ÀûÀÎ Á¤È¼Ò-ºÎÈ¼Ò ¿òÁ÷ÀÓ ÃßÁ¤ |
¿µ¹®Á¦¸ñ(English Title) |
Efficient Integer pel and Fractional pel Motion Estimation on H.264/AVC |
ÀúÀÚ(Author) |
À±È¿¼ø
±èÈñ¼÷
Á¤¹Ì°æ
±è¹Ì¿µ
Á¶¿µÁÖ
±è±âÈ«
À̱ͻó
HyoSun Yoon
Hyesuk Kim
Migyoung Jung
Miyoung Kim
Youngjoo Cho
GiHong Kim
GueeSang Lee
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¿ø¹®¼ö·Ïó(Citation) |
VOL 16-B NO. 02 PP. 0123 ~ 0130 (2009. 04) |
Çѱ۳»¿ë (Korean Abstract) |
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ºí·ÏÀÇ Å©±â¿¡ µû¶ó ÀûÀÀÀûÀ¸·Î ºÎÈ¼Ò Å½»ö ÆÐÅÏÀÌ °áÁ¤µÇ¹Ç·Î º¸´Ù Á¤È®ÇÏ°Ô ºÎÈ¼Ò ¿òÁ÷ÀÓ ÃßÁ¤À» ¼öÇàÇÒ ¼ö ÀÖ´Ù. Á¦¾ÈÇÑ ±â¹ýÀ» Àü¿ª Ž»ö ±â¹ý°ú ºñ±³ÇÏ¿´À» ¶§ ¾à 5.2¹èÀÇ ¼Óµµ Çâ»óÀ» °¡Á®¿ÔÀ¸¸ç, ¿µ»ó ÈÁú¿¡ ÀÖ¾î¼ ¾à 0.01 (dB)Á¤µµ ¼º´É ÀúÇϸ¦ º¸¿´´Ù. ¹Ý¸é¿¡, ºñ´ëĪ ´ÙÁß À°°¢Çü Ž»ö ±â¹ý°ú ºñ±³ÇÏ¿´À» ¶§ ¿òÁ÷ÀÓ ÃßÁ¤ ¼Óµµ¿Í ÈÁú¿¡ ÀÖ¾î¼ °¢°¢ ¾à 1.2¹è¿Í ¾à 0.02 (dB)Á¤µµ Çâ»óÀ» º¸¿´´Ù. |
¿µ¹®³»¿ë (English Abstract) |
Motion estimation (ME) plays an important role in digital video compression. But it limits the performance of image quality and encoding speed and is computational demanding part of the encoder. To reduce computational time and maintain the image quality, integer pel and fractional pel ME methods are proposed in this paper. The proposed method for integer pel ME uses a hierarchical search strategy. This strategy method consists of symmetrical cross-X pattern, multi square grid pattern, diamond patterns. These search patterns places search points symmetrically and evenly that can cover the overall search area not to fall into the local minimum and to reduce the computational time. The proposed method for fractional pel uses full search pattern, center biased fractional pel search pattern and the proposed search pattern. According to block sizes, the proposed method for fractional pel decides the search pattern adaptively. Experiment results show that the speedup improvement of the proposed method over Unsymmetrical cross Multi Hexagon grid Search (UMHexagonS)and Full Search (FS) can be up to around 1.2 ¢¦5.2 times faster. Compared to image quality of FS, the proposed method shows an average PSNR drop of 0.01 dB while showing an average PSNR gain of 0.02 dB in comparison to that of UMHexagonS. |
Å°¿öµå(Keyword) |
¿òÁ÷ÀÓÃßÁ¤
ºñµð¿À ¾ÐÃà
¿òÁ÷ÀÓ º¤ÅÍ
°¡º¯ÀûÀÎ ºí·Ï Å©±â
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H.264
Motion Estimation
Video Compression
Motion Vector
Variable Block Size
Integer Pel
Fractional Pel
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