Inside a HDMI Cable

Firstly a brief overview. High Definition Multimedia Interface (HDMI) cables are a 19-pin digital connection that transmits both high definition uncompressed video and multi-channel audio through a single cable. HDMI is the preferred connection for HD devices and is becoming more and more popular.

From their use in Hometheatre systems inconjunction with HDTVs and Blu-ray player to their increasing use with gaming consoles, the future is bright for HDMI.

We carry a wide range of HDMI Cables on tvtrade.ie, ranging in length and spec inclusing the new V1.4 HDMI Cable which is 3D compatible.   We also stock  HDMI Splitters, Couplers & Repeaters to meet your needs.

• Pins 1 through 9 carry the three TMDS data channels (Transition Minimized Differential Signaling – the technology that allows DVI and HDMI to send high-speed digital data), three pins per channel. TMDS data includes both video & audio info and each channel has three separate lines for + values, – values, and a ground or data shield.
• Pins 10 through 12 carry data for the TMDS clock channel, which helps keep the signals in synchronization. As with the TMDS data channels, there are separate lines for + values, – values, and a data shield.
• Pin 13 is carries the CEC (Consumer Electronics Control) channel, used for sending command and control data between connected devices.
• Pin 14 is reserved for future use.
• Pins 15 and 16 are dedicated to the DDC (Display Data Channel), used for communicating EDID (Extended Display Identification Channel) information between devices.
• Pin 17 is a data shield for the CEC and DDC channels.
• Pin 18 carries a low-voltage (+5V) power supply.
• Pin 19 is the Hot Plug Detect, dedicated to monitoring power up/down and plug/unplug events.