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The first part of this white paper explores the basic concepts behind HDMI, the markets it serves and its leadership role in multimedia interfaces. This is followed by a tutorial on the new capabilities of HDMI 1.4 and their role in providing a richer, more straightforward user experience. Next, we’ll explore a series of user case scenarios that illustrate how the HEAC feature can simplify cabling requirements between digital home multimedia devices. The last portion of this paper discusses the architectural considerations and technical details involved with incorporating the Ethernet and Sony/Philips Digital Interconnect Format (S/PDIF) standards into the HDMI system-on-chips (SoCs) to support the HEAC feature.

HDMI’s global acceptance as the connectivity technology of choice for consumer electronics and PC multimedia products is largely due to its ability to deliver the highest quality audio/video signal over a single cable. Developed as a backwards-compatible enhancement of the Digital Visual Interface (DVI) standard, the HDMI electrical interface transports its data using three Transition Minimized Differential Signaling (TMDS) serial data channels which are logically interleaved to form a single serial data stream.

Part One: An Introduction to VoIP
Summary: What Is Voice Over Internet Protocol?
Voice over internet protocol (VoIP) is a communications technology that uses the internet to transfer voice signals in the form of bits and bytes. It delivers these bits and bytes to a specified internet address rather than a telephone number. It’s easier to think of it as being like sending e-mail from one computer to another, but in real time and using voice instead of text. The technology that most likely runs your existing switchboard and phones is a traditional public switched telephone network (PSTN) service. VoIP’s advantage over this is its ability to combine several services, such as voice mail, video, e-mail and conferencing. This instantly increases your ability to collaborate and can result in higher productivity.