HBO HD

HBO HD (originally called HBO HDTV from March 1999 until April 2006) is a high definition simulcast feed of HBO that broadcasts in the 1080i resolution format.

HBO maintains high definition simulcast feeds of its main channel and all six multiplex channels. HBO HD is available on all major cable television providers including, among others, Charter Communications (including systems once owned by former HBO sister company Time Warner Cable); Comcast Xfinity (which, in 2016, began downconverting HBO, Cinemax and other cable channels transmitting in 1080i to 720p60); Cox Communications and Optimum; as well as DirecTV; AT&T U-verse; and Verizon FiOS. From the 2008 rollout of HD simulcasts for the HBO multiplex feeds until the mid-2010s, the majority of pay television providers that carried HBO HD generally offered only the main channel in high definition, with HD carriage of the multiplex channels varying by market.

As of 2020, most providers transmit all seven HBO multiplex channels in HD, either on a dedicated HD channel tier separate from their SD assignments or as hybrid SD/HD feeds.