Adaptive Length Block Truncation Coding for LCD Overdrive

Overdrive technique in liquid-crystal displays (LCD) is important to alleviate the motion blur caused by the slow response time of the liquid-crystal. Since this technique requires the memory storing a previous frame, the amount of the frame data should be decreased to reduce LCD cost as much as possible. To do this end, in this paper, we propose an improved block truncation coding (BTC) which adopts an adaptive length coding according to the pixel variance. In the proposed method, an efficient bit allocation for luminance and chrominance components is further utilized. The experimental results show that the proposed method outperforms the conventional method.