In this paper, we present a research on image compression technique in overdrive system of liquid crystal displays (LCD). The overdrive in LCD is a technique to reduce the response time of LCD, to remove drawback of motion blur caused by the slow response of liquid crystals. This problem has been studied in recent years. | T¤p ch½ Tin håc v i·u khiºn håc, , (2012), 217 233 NGHI N CÙU C I TI N CH T L×ÑNG N N NH TRONG LCD NGUY N HÚU T I1 , NGUY N THÀ HO NG LAN2 1 Khoa Cæng ngh» Thæng tin, ¤i håc Khoa håc Hu¸ 2 ¤i håc B¡ch khoa H Nëi, Vi»n CNTT & TT Tóm t t. Trong b i b¡o n y, chóng tæi tr¼nh b y nghi¶n cùu v· kÿ thuªt n²n £nh ùng döng trong h» thèng overdrive cõa c¡c thi¸t bà m n h¼nh tinh thº läng (LCD). Overdrive trong LCD l h» thèng khc phöc hi»n t÷ñng h¼nh £nh chuyºn ëng bà mí khi hiºn thà tr¶n LCD. ¥y l v§n · ang ÷ñc quan t¥m nghi¶n cùu trong nhúng n«m g¦n ¥y. C¡c mæ h¼nh n²n £nh trong LCD ¢ ÷ñc · xu§t bði nhi·u t¡c gi£ kh¡c nhau. Tr¶n cì sð nghi¶n cùu c¡c mæ h¼nh, chóng tæi · xu§t mët c£i ti¸n cõa mæ h¼nh Advanced Hybrid Image Codec (AHIC) vèn l mët mæ h¼nh câ c§u tróc ìn gi£n nh÷ng l¤i cho t sè n²n cao v ch§t l÷ñng £nh n²n kh¡ tèt. Mæ h¼nh c£i ti¸n ÷ñc gåi t¶n l Mean-Adaptive Image Coding (MAIC), câ kh£ n«ng th½ch nghi cao nh¬m gi£m t¡c ëng cõa nhi¹u, lo¤i bä ÷ñc hi»u ùng nhi¹u khèi (blocking effect) m AHIC mc ph£i. K¸t qu£ thû nghi»m tr¶n 20 chuéi khung h¼nh chuy¶n döng trong l¾nh vüc xû lþ video ÷ñc chån låc ng¨u nghi¶n cho th§y, MAIC ¢ lo¤i bä ÷ñc ho n to n hi»n t÷ñng nhi¹u khèi, l lo¤i nhi¹u m mt ng÷íi r§t nh¤y c£m khi quan s¡t tr¶n chuéi khung h¼nh chuyºn ëng, gióp h» thèng Overdrive ho¤t ëng chu©n x¡c hìn º mang l¤i h¼nh £nh ch§t l÷ñng cao cho LCD. Abstract. In this paper, we present a research on image compression technique in overdrive system of liquid crystal displays (LCD). The overdrive in LCD is a technique to reduce the response time of LCD, to remove drawback of motion blur caused by the slow response of liquid crystals. This problem has been studied in recent years. Image compression models in LCD are suggested in this paper. Based on research on the models, we propose a promotion of Advanced Hybrid Image Codec (AHIC), which has a rather simple structure, high rate of compression and rather good quality .