Auto HD is a new feature that lets you find high definition (HD) programming more simply and easily. When Auto HD is turned on, the HD version of a show will automatically be displayed on the corresponding standard definition (SD) channel.
For example, if you change the channel to CNN in standard definition and have Auto HD turned on, CNN will automatically be displayed in HD. You’ll know you’re watching the channel in high definition because of an HD icon that appears on your screen in the channel banner.