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Analog Television Adapter (ATVA)-

Analog Television Adapter (ATVA) is a device that converts digital multimedia signals (such as MPEG) into analog television signals (such as NTSC or PAL). These adapter boxes may provide a single function such as providing Internet television service or they may convert digital signals into several different forms such as audio, data, and video. When adapter boxes convert into multiple information forms, they may be called multimedia terminal adapters (MTAs) or integrated access devices (IADs).
Analog television adapters (ATA) must convert video, audio, and control signals (such as requests for changing channels) into forms that can be sent and received via data networks such as the Internet.