LCD Overdrive Frame Memory Compression Using Adaptive Block Truncation Coding

In order to reduce the frame memory usage in LCD overdrive, there is a basic technique called block truncation coding (BTC) is commonly used due to its efficient coding and low implementation cost. However, there is some limitation of BTC that causes severe perceptual artifacts and degrades overdrive performance. To overcome the problem of BTC here we propose an adaptive multi-level BTC (AM-BTC) in this paper. The AM-BTC as suggested firstly overcomes the limitation by adaptive selection of 2-level or 4-level BTC according to the edge property of the coding block. Then, to reduce the bit rate of AM-BTC we improve the 2-level and 4-level BTCs by using only luminance bitmap to represent three color bitmaps, depending upon the color bitmaps advancement can be done. Moreover, as a result of this paper different types of images are compared for different PSNR values.