The DS-6901UDI(B) 1ch 4K Video Decoder provides HDMI, VGA, and BNC output interfaces. It supports up to 4K (3840 × 2160@30Hz) resolution via the HDMI output interface. The decoder supports multiple video compression formats, including H.265+/H.265, H.264+/H.264, Hik264, MPEG4, and MJPEG. It also supports various encapsulation formats such as PS, RTP, TS, ES, and HIK. The device offers three encoding levels: baseline, main, and high-profile. For audio, it supports G.722, G711A, G726, G711U, MPEG2-L2, and AAC compression. The decoder features two decoding modes: active decoding and passive decoding, and supports remote video files’ decoding output. It also supports two-way audio via client software, window opening, window roaming, and window split. Additionally, it supports multi-screen control with a PC installed with RSC server and can get streams and decode via URL and RTSP from encoding devices.