With the rapid increasing resolution of display devices in computer, television and mobile phone, there is a consensus in the industry to solve the problem of lacking of display link bandwidth using display stream compression(DSC) technologies. Hence, several display stream compression methods continually appear in recent years, for example JPEG-XS, intra-only coding in H.264/AVC and Dirac (VC-2), HEVC-SCC screen contents coding and DSC of VESA, etc. Among these, the VESA DSC is a widely acceptable standard that is used in display link for a low cost, low delay, and visually lossless lightweight codec. A number of high efficient coding technologies are used in DSC including advanced prediction, indexed color history, plain entropy coding and perfect rate control. The paper overviews these new features and key technologies in DSC standard.