Abstract: A Cr—Mn—N austenitic heat-resistant steel is provided. The heat-resistant steel comprises, in weight percentage, carbon 0.20% to 0.50%, silicon 0.50% to 2.00%, manganese 2.00% to 5.00%, phosphorus less than 0.04%, sulphur less than 0.03%, chromium 20.00% to 27.00%, nickel 6.00% to 8.00%, molybdenum less than 0.50%, niobium less than 0.60%, tungsten less than 0.60%, vanadium less than 0.15%, nitrogen 0.30% to 0.60%, zirconium less than 0.10%, cobalt less than 0.10%, yttrium less than 0.10%, boron less than 0.20%, with the balance iron. The heat-resistant steel has high temperature strength, high thermal conductivity, low thermal expansion coefficient, good dimensional stability, good ductility, heat resistance, impact resistance, and low production costs, and meets the requirements for high performance engines.

Abstract: A lossless compression method and system applied to hardware video decoding are provided. The method sequentially includes a video decoding step, a compression step, a storage step and a decompression step, wherein in the compression step, lossless compression is performed by taking a 16×4 Y luma block and a corresponding 8×2 U chroma block and V chroma block as a compression unit; in the storage step, compact compression and storage is performed on a complete frame of image by taking four pixel lines as a unit, and a starting address of every four pixel lines is fixed; and the video decoding step includes a reference frame reading step, and a two-level Cache structure is adopted in the reference frame reading step. The system is a system applying the method.

Abstract: A lossless compression method and system applied to hardware video decoding are provided. The method sequentially includes a video decoding step, a compression step, a storage step and a decompression step, wherein in the compression step, lossless compression is performed by taking a 16×4 Y luma block and a corresponding 8×2 U chroma block and V chroma block as a compression unit; in the storage step, compact compression and storage is performed on a complete frame of image by taking four pixel lines as a unit, and a starting address of every four pixel lines is fixed; and the video decoding step includes a reference frame reading step, and a two-level Cache structure is adopted in the reference frame reading step. The system is a system applying the method.

Abstract: A Cr—Mn—N austenitic heat-resistant steel is provided. The heat-resistant steel comprises, in weight percentage, carbon 0.20% to 0.50%, silicon 0.50% to 2.00%, manganese 2.00% to 5.00%, phosphorus less than 0.04%, sulphur less than 0.03%, chromium 20.00% to 27.00%, nickel 6.00% to 8.00%, molybdenum less than 0.50%, niobium less than 0.60%, tungsten less than 0.60%, vanadium less than 0.15%, nitrogen 0.30% to 0.60%, zirconium less than 0.10%, cobalt less than 0.10%, yttrium less than 0.10%, boron less than 0.20%, with the balance iron. The heat-resistant steel has high temperature strength, high thermal conductivity, low thermal expansion coefficient, good dimensional stability, good ductility, heat resistance, impact resistance, and low production costs, and meets the requirements for high performance engines.