Display Stream Compression Encoder Architectures for Real-time 4K and 8K Video Encoding

摘要

The Display Stream Compression (DSC) standard enables visually-lossless video compression with a much lower hardware cost than H.264 and HEVC albeit with a lower level of compression. We present the first published DSC encoder architectures-including a Single Slice architecture which supports one slice per line encoding and a Slice Interleaving architecture which supports one or more slices per line. Seven designs that fully support the DSC v1.2a standard have been implemented and synthesized in a 28 nm CMOS standard cell library. The designs are able to perform real-time encoding at frame rates up to 35-40 frames per second (fps) for 8K UHD (7680×4320), 140-160 fps for 4K UHD (3840×2160), and 560- 642 fps for 1080p (1920×1080) video in 4:4:4 mode. In native 4:2:2 and 4:2:0 modes, frame rates are doubled to 70-80 fps, 280-320 fps and 1120-1284 fps for 8K UHD, 4K UHD and 1080p, respectively. The designs require 194-433 K minimumsized NAND2 equivalent gates and main memory of 31.9-68.5 KB to support 8K UHD.