Abstract: A method for lossless ARGB (Alpha, Red, Green, Blue) compression based on an intra-block prediction is provided. The method is executed by a processor, and the method comprises for an input image block under a processing channel, executing the following operations until all input image blocks are encoded: obtaining a predicted value of the input image block under a current processing channel based on the input image block under the current processing channel by the intra-block prediction; determining predicted residuals of the input image block under the current processing channel based on the predicted value and an original pixel value; inputting the predicted residuals into a residual encoder for encoding to obtain a residual stream of the input image block under the current processing channel; and storing residual streams of all input image blocks of all processing channels as a compressed file in a storage file.

Abstract: Provided are a DEMOS device and a method for producing the same. The DEMOS device includes a silicon substrate, a well region, a source region, a drain region, a drift region, a lightly doped region, a gate structure, and a field plate structure. The gate structure includes a primary gate structure and a secondary gate structure. The primary gate structure is disposed on a p-type well or an n-type well of the well region, and configured to receive an input signal. The secondary gate structure covers part of the p-type well and part of the drift region, or part of the n-type well and part of the drift region. The secondary gate structure is configured to receive a fixed bias voltage. The short gate length of the primary gate structure significantly reduces gate-drain capacitance, and increases cutoff frequency, enhancing high-frequency performance, while having minimal impact on breakdown voltage.