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Step-up compliance tests for HDMI 1.3

Posted: 16 Jan 2008 ?? ?Print Version ?Bookmark and Share

Keywords:1? 080p? high-definition video? HDMI? HDMI sink and source compliance?

The High-Definition Multimedia Interface (HDMI) is an industry-supported, uncompressed, all-digital audio/video interface. HDMI provides a connection between any compatible digital A/V sourceincluding STBs, DVD players and A/V receiversand a compatible digital audio and/or video monitor such as DTV.

HDMI is the dominant standard for global digital connectivity. It is supported by over 400 vendors for consumer electronics and products. HDMI enables standard, enhanced or high-definition video, plus multi-channel digital audio on a single cable. It is independent of the various DTV standards such as ATSC, DVB (-T,-S,-C). These are encapsulations of the MPEG data streams, which are passed off to a decoder, and sent to the output as uncompressed video data, which can be high-definition. The video data is then encoded with a Transition Minimized Differential Signaling (TMDS) scheme for digital transmission over HDMI. For compliance tests and characterization, a TMDS signal generator is required.

HDMI ver 1.2 supports up to eight channels of 1bit audio, which is used on Super Audio CDs. The standard HDMI Type A connector has 19 pins. The higher resolution Type B with 29 pins has been defined to support resolutions higher than 1,080p, although it is not yet in common use. HDMI Type A is backward compatible with the single-link Digital Visual Interface (DVI) used in modern computer monitors and graphic cards. This means that a DVI source can drive an HDMI monitor, or vice versa, by means of a suitable adapter or cable, but the audio and remote control features of HDMI are not supported by DVI.

View the PDF document for more information.




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