Note: While HDMI 2.1 did standardize transport of dynamic HDR metadata over HDMI, in actuality it only formalized dynamic metadata interfaces already utilized by Dolby Vision and HDR10+ in HDMI 2.0, which is why neither Dolby Vision nor HDR10+ require HDMI 2.1 to function properly. [126] a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad ae af ag ah ai aj ak al am an ao ap aq ar "High-Definition Multimedia Interface Specification 1.3a" (PDF). HDMI Licensing, LLC. November 10, 2006. Archived from the original (PDF) on March 5, 2016 . Retrieved April 1, 2016– via Microprocessor.org. Standards Details– CEA-861-E". Consumer Electronics Association. March 1, 2008. Archived from the original on November 7, 2011 . Retrieved November 20, 2011. Uncompressed 10 bpc color depth and RGB or Y′C BC R 4:4:4 color format are assumed on this table except where noted. Although no maximum length for an HDMI cable is specified, signal attenuation (dependent on the cable's construction quality and conducting materials) limits usable lengths in practice [70] [71] and certification is difficult to achieve for lengths beyond 13m. [72] HDMI 1.3 defines two cable categories: Category 1-certified cables, which have been tested at 74.25MHz (which would include resolutions such as 720p60 and 1080i60), and Category 2-certified cables, which have been tested at 340MHz (which would include resolutions such as 1080p60 and 4K30). [5] :§4.2.6 [63] [73] Category 1 HDMI cables are marketed as "Standard" and Category 2 HDMI cables as "High Speed". [3] This labeling guideline for HDMI cables went into effect on October 17, 2008. [74] [75] Category 1 and 2 cables can either meet the required parameter specifications for inter-pair skew, far-end crosstalk, attenuation and differential impedance, or they can meet the required non-equalized/equalized eye diagram requirements. [5] :§4.2.6 A cable of about 5 meters (16 feet) can be manufactured to Category 1 specifications easily and inexpensively by using 28 AWG (0.081mm 2) conductors. [70] With better quality construction and materials, including 24AWG (0.205mm 2) conductors, an HDMI cable can reach lengths of up to 15 meters (49 feet). [70] Many HDMI cables under 5meters of length that were made before the HDMI 1.3 specification can work as Category 2 cables, but only Category 2-tested cables are guaranteed to work for Category 2 purposes. [76]

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Built-in stereo microphone or two XLR audio inputs (48V phantom power, mic, and line are switchable)Video formats that require more bandwidth than 18.0 Gbit/s (4K 60 Hz 8 bpc RGB), such as 4K 60 Hz 10 bpc (HDR), 4K 120 Hz, and 8K 60 Hz, may require the new "Ultra High Speed" or "Ultra High Speed with Ethernet" cables. [82] HDMI 2.1's other new features are supported with existing HDMI cables. On January 28, 2008, In-Stat reported that shipments of HDMI were expected to exceed those of DVI in 2008, driven primarily by the consumer electronics market. [21] [31] a b Even for a compressed audio codec that a given HDMI device cannot transport, the source device may be able to decode the audio codec and transmit the audio as uncompressed LPCM. HDMI Knowledge Base". HDMI.org. Archived from the original on April 26, 2009 . Retrieved June 19, 2008.

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a b c d "HDMI Licensing, LLC Announces Features of the Upcoming HDMI Specification Version 1.4". HDMI Licensing, LLC. May 28, 2009. Archived from the original on June 1, 2009 . Retrieved May 28, 2009.

Conclusion

HDMI implements the ANSI/CTA-861 standard, which defines video formats and waveforms, transport of compressed and uncompressed LPCM audio, auxiliary data, and implementations of the VESA EDID. [4] [5] :p. III CEA-861 signals carried by HDMI are electrically compatible with the CEA-861 signals used by the Digital Visual Interface (DVI). No signal conversion is necessary, nor is there a loss of video quality when a DVI-to-HDMI adapter is used. [5] :§C The Consumer Electronics Control (CEC) capability allows HDMI devices to control each other when necessary and allows the user to operate multiple devices with one handheld remote control device. [5] :§6.3