A/338: ATSC Candidate Standard Revision: Companion Device
Approved 2 January 2019. The CS period ends on 31 July 2019.
This document specifies the communication protocol between an ATSC 3.0 Primary Device (PD) and an ATSC 3.0 Companion Device (CD). In this context, the primary device is the primary receiver and is used to present the primary content. The companion device communicates with the primary device to present related, supplementary content, or even the same content as that being presented on the primary device. Examples of primary devices include television sets, settop/converter boxes, and mobile devices that are capable of receiving ATSC 3.0 services. Examples of companion devices are laptops, tablets and smartphones. Use of one of these example companion devices as an ATSC 3.0 receiving device displaying primary content is out of scope of this document, such as using a tablet that has a built-in ATSC 3.0 antenna as a primary viewing device. Use of a companion device to access television-related content, but not in conjunction or communication with a primary receiving device is also out of scope of this document.
A redline document is available showing changes relative to the current published version of A/338.Download PDF File