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Introduced in HDMI 1.4, HDMI Ethernet and Audio Return Channel (HEAC) adds a high-speed bidirectional data communication link (HEC) and the ability to send audio data upstream to the source device (ARC). HEAC utilizes two lines from the connector: the previously unused Reserved pin (called HEAC+) and the Hot Plug Detect pin (called HEAC−).
Enhanced Audio Return Channel (eARC), part of the HDMI specification This page was last edited on 20 August 2024, at 20:40 (UTC). Text is available under the ...
HDMI has become the de facto standard for passing video and audio on AV receivers. Features supported through HDMI may include pass-through of 4K, 8K, and HDR video, audio return channel (ARC), enhanced audio return channel (eARC), variable refresh rate (VRR), and pass-through of object-based audio formats such as Dolby Atmos and DTS:X. [6]
Consumer Electronics Control (CEC) is a feature of HDMI designed to control HDMI connected devices [1] [2] by using only one remote controller; so, individual CEC enabled devices can command and control each other without user intervention, for up to 15 devices.
Generally, a Dolby Digital Plus bitstream can only be transported over an HDMI 1.3 or greater link. Older receivers support earlier versions of HDMI, or only have support for the S/PDIF system for digital audio, or analog inputs. For non-HDMI 1.3 links, the player can decode the audio and then transmit it via a variety of different methods.
Dolby AC-4 is an audio compression standard supporting multiple audio channels and/or audio objects. Support for 5.1 channel audio is mandatory and additional channels up to 7.1.4 are optional. [38] AC-4 provides a 50% reduction in bit rate over AC-3/Dolby Digital Plus. [38]
For example, some hybrid Internet access services use a one-way cable television system for the forward channel and a dial-up modem for the return channel. Even when the return and forward channels use the same medium, their differences often dictate the use of very different data modulation and coding techniques. For example, in a star radio ...
Intel High Definition Audio (IHDA) (also called HD Audio or development codename Azalia) is a specification for the audio sub-system of personal computers. It was released by Intel in 2004 as the successor to their AC'97 PC audio standard.
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