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DisplayPort connectors on them, but these are niche applications that have not taken hold in the market." [199] Practical Issues and tips: HDMI 1.1 is very common and was the first spec to hit the mass market apart from CableTV set-top boxes. Many AV receivers came out with this spec and are fine for handling DVD-Audio and uncompressed PCM audio. HDMI 1.2 Audio Return Channel: Allows an HDMI-connected TV with a built-in tuner to send audio data "upstream" to a surround audio system, eliminating the need for a separate audio cable. Ultra High Speed HDMI Cable — This certification level will certify cable for speeds of at least 48.0 Gbit/s, which is enough for 4K 180 Hz or 8K 50 Hz. The certification procedures for this level are not finished yet, so these certifications are not being issued at this time. Any cables currently claiming to be an Ultra High Speed HDMI cable are fake. 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]
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 Change the video format to YU12 or YV12 (OBS on Raspberry Pi does not support MJPEG at this stage).No difference in features, performance or function over HDMI 1.3a, but rather testing for products based on active HDMI cables. Abstract: This is a major update that increases bandwidth to 18Gbps and includes support for 4k video—including dual video to the same display to multiple users. Audio is increased from 8 to 32 channels including simultaneous delivery of multichannel audio to a maximum of four users. Audio sample frequency is increased to 1536kHz. Summary Many newer 1080p 144 Hz monitors with HDMI 1.4 only support 9.0 Gbit/s, only enough for 120 Hz over HDMI. Even older models like the VG248QE (which still have "HDMI 1.4") are limited to less, only enough for 60 Hz over HDMI. Many mobile phones can produce an output of HDMI video via a micro-HDMI connector, SlimPort, MHL [188] [189] [190] or other adapter. [191] [192] [193] [194] Legacy compatibility [ edit ]
In September 2009, AMD announced the ATI Radeon HD 5000 series video cards, which have HDMI 1.3 output (deep color, xvYCC wide gamut capability and high bit rate audio), 8-channel LPCM over HDMI, and an integrated HD audio controller with a Protected Audio Path that allows bitstream output over HDMI for AAC, Dolby AC-3, Dolby TrueHD and DTS-HD Master Audio formats. [176] [177] [178] The ATI Radeon HD 5870 released in September 2009 is the first video card that allows bitstream output over HDMI for Dolby TrueHD and DTS-HD Master Audio. [178] The AMD Radeon HD 6000 Series implements HDMI 1.4a. The AMD Radeon HD 7000 Series implements HDMI 1.4b. [179]
Does HDMI support 144Hz? Absolutely, but depending on the generation of cable and port you’re working with, you may only have access to some resolutions, rather than all of the most popular ones. All versions of HDMI from HDMI 1.3 onward right through to HDMI 2.1 provide enough raw bandwidth for 144Hz, provided sacrifices are made in color, chroma, compression, or resolution. HDMI 2.1 – the latest and greatest HDMI version – has the most support for 144Hz with the least compromise, allowing 1440p and 4K resolution at 144Hz; although anything higher than that and you’ll need to use Display Stream Compression (DSC) or Chroma Subsampling.
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