What standard is commonly used to connect digital terminal adapters (DTA) to high definition televisions?

The standard commonly used to connect digital terminal adapters (DTA) to high definition televisions is HDMI. HDMI, or High-Definition Multimedia Interface, is designed to transmit high-quality audio and video signals over a single cable. This capability makes it ideal for connecting modern digital devices, including DTAs, to HD televisions, which require high bandwidth to deliver the best picture and sound quality.

HDMI supports various video resolutions, including 720p, 1080p, and beyond, enabling it to carry the high-definition content that today's media consumption demands. It also supports multiple audio channels, which enhances the viewing experience by providing surround sound capabilities.

In contrast, while other options like VGA and composite video can be used for video transmission, they do not support the same high resolutions and quality as HDMI. USB connections are primarily utilized for data transfer and charging rather than video output in this context. Thus, HDMI stands out as the appropriate and commonly used standard for connecting DTAs to HD televisions.