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Retailer Requires 'Simplay' HDMI Testing". TWICE. December 11, 2006. Archived from the original on September 19, 2009 . Retrieved November 18, 2009. HDMI LICENSING, LLC ANNOUNCES AVAILABILITY OF HDMI 1.2 SPECIFICATION". HDMI.org. HDMI Licensing, LLC. Archived from the original on August 26, 2017 . Retrieved August 25, 2017.
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] Matt Burns (June 28, 2006). "Pics of the HDMI-mini connector". engadgetHD. Archived from the original on November 3, 2009 . Retrieved November 18, 2009.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 Alen Koebel (February 2003). "DVI and HDMI: Digital A/V Interfaces for A New Age". Widescreen Review (69): 64 . Retrieved June 24, 2008. When HDCP is added to DVI, the result is often called "DVI+HDCP." When this is used on an HDTV, HD monitor or set-top box, a further standard is usually applied: IEA/CEA-861 (currently 861-B)...the interface is commonly known as DVI-HDTV.
Evan Sun (November 8, 2007). "Testing your High Definition embedded devices using the HDMI Version 1.3 specification". Audio Design Line. Archived from the original on July 20, 2012 . Retrieved July 1, 2008. HDMI Licensing appoints Steve Venuti as new LLC President; HDMI Adoption continues to grow" (Press release). HDMI.org. April 8, 2008. Archived from the original on April 13, 2016 . Retrieved April 30, 2008.LPCM, Dolby Digital, DTS, DVD-Audio, Dolby Digital Plus, Dolby TrueHD, DTS-HD High Resolution Audio, DTS-HD Master Audio, MPCM, DSD, DST, Dolby Atmos, DTS:X Brian Weatherhead (November 2004). "DVI and HDMI Connections and HDCP Explained". Secrets of Home Theater and High Fidelity . Retrieved July 1, 2008.
a b c Brian O'Rourke (January 28, 2008). "In-Stat Reports DVI on the Decline as HDMI and DisplayPort Grow". Business Wire, Inc . Retrieved July 2, 2008. The royalty fee structure is the same for all volumes. The following variable per-unit royalty is device-based and not dependent on number of ports, chips or connectors: Pin mapping for USB Type-C HDMI Alternate Mode [195] Relationship with DisplayPort [ edit ] Dual-mode DisplayPort logo 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.a b "Launch of HDMI 1.4 Specification" (PDF). HDMI.org. October 6, 2009. Archived from the original (PDF) on January 6, 2016 . Retrieved November 16, 2009. The 48 Gbit/s bandwidth provided by HDMI 2.1 is enough for 8K resolution at approximately 50 Hz, with 8 bpc RGB or Y′C BC R 4:4:4 color. To achieve even higher formats, HDMI 2.1 can use Display Stream Compression with a compression ratio of up to 3∶1. Using DSC, formats up to 8K ( 7680 × 4320) 120 Hz or 10K ( 10240 × 4320) 100 Hz at 8 bpc RGB/4:4:4 are possible. Using Y′C BC R with 4:2:2 or 4:2:0 chroma subsampling in combination with DSC can allow for even higher formats. [125] CEC has been in the HDMI specification since version 1.0, but only began to see implementation in consumer electronics products in 2008 [149] [150]