Show Me the Next-Generation HDMI
Early versions of HDMI (version 1.2 and below) clocked their serial links at 165 MHz, giving the connection a total capacity of 4.95 Gbps. When the HDMI 1.3 specification was introduced in 2006, its optional 340 MHz system clock rate doubled the link’s maximum capacity to 10.2 Gbps. To put some perspective on this enormous bandwidth, it only takes 2.23 Gbps to support a 1080i, 8 bits/color HDTV display running at a 60 Hz frame refresh rate.
The HDMI serial data stream is segmented into packets that allow it to encapsulate nearly any digital media format including standard, enhanced, or high-definition video, multi-channel digital audio and control information on a single cable. Video data is always transmitted in an uncompressed format, complete with horizontal and vertical blanking intervals. The video blanking intervals (Data Island Periods) are used to transmit audio data, which can consist of any compressed, non-compressed, PCM, single or multi-channel formats and control information. The audio formats include the new DTS-HD Master Audio and Dolby TrueHD formats used by Blu-ray media players.