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jeromelang

HDMI cable for ARC / eARC

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Do you take into consideration about signal flow directionality of HDMI cable?

Specifically, what is your signal flow directionality preference the HDMI cable being used from Amp to TV with auto return channel (ARC) duo purpose?

Do you connect so that signal directionality is correct based on: from AVR to TV to ensure the best picture quality but then the audio returning from the TV is not optimal

Or

Do you connect so that signal directionality is correct based on: from TV to AVR to ensure best sound from using the TV as a source, but picture quality playback from blu-ray player not so good?

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Some are directional and some are not. Mainly this is whether the cable has dedicated Ethernet or Audio Return Channel going on from what I understand.

If it does have the directional arrow, best to plug it into whatever you want to receive it.

E.g. Blu ray player to projector (so an output to an input) the arrow should put into the projector input.

Follow this methodology for audio, ARC, Ethernet etc from your various sources

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For those of us still playing discs through blu-ray players, the preference is connecting the player to an av receiver/processor and then output to the TV, for the best picture quality on the TV. The directionality of the HDMI cable has to be oriented from AVR to TV.

 

But many of us would also have some sort of devices playing subscription contents going straight into the TV for the convenience of other members in our family. And when we need the sound from the TV to go back into the AVR, the directionality of the HDMI cable is now not optimum....

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I use hdmi and an optical cable in this situation.... if it helps

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Correct Jerome.

However in the above mentioned case your TV would sending an input to the AV receiver, which would be plugging into an input port, not a HDMI output port.

I don't know how many TV's out there a pushing HDMI out, most just take inputs and then have an optical audio output.

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Since 2013, the Audio Return Channel (ARC) feature allows 1-single HDMI wire connection between the display device and the AVR/Sound Bar. This is pretty much prevalent on all TVs with HDMI connectivity.

 

The AVR/Sound Bar passes video to the display device via the HDMI cable connected between them.

 

The display device can also pass audio back into the AVR/Sound Bar via the same HDMI cable (hence it is called audio return channel). Usually only 1 HDMI input on the display device is designated to support ARC. Digital audio video sources connected to the TV's other HDMI inputs can be passed out via this ARC designated HDMI input/output terminal into external AVR/sound bar for surround decoding/amplification. 

 

The current ARC standards on display devices support only lossy codecs like dolby digital/dts.

 

In the very near future, they will support eARC, which allows lossless multi-channel codecs like dolby atmos/dolby true hd/dts:x/dts hd master audio to be passed through to external AVR/sound bar.

 

Some AVRs and Sound Bars already support eARC (some via firmware updates this year).

 

 

Directionality now becomes a headache.....  

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36 minutes ago, jeromelang said:

Some AVRs and Sound Bars already support eARC (some via firmware updates this year).

Directionality now becomes a headache.....  

The industry has plans for E-ARC Jerome . There are advantages for avr;s and pre pro's if you take the a/v switching away from them and place it in the TV ; directionality being just one :) On screen displays in the latest 16ch pres  are already being dropped for tablet etc gui's due to hdmi bandwidth increasing..  How this app integration effects projectors we'll see..

Quote

 

In theory, this new protocol also means manufacturers could create a new wave of audio-only receivers, soundbars, and amplifiers, as your TV would be able to handle the video signal, while still allowing for the highest-quality audio to make its way to your sound system. This could significantly reduce the cost of all kinds of home theater components.


 

 

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For someone who places top value on sound quality, letting digital audio travel down 2 sets of jittery HDMI interfaces (player-to-tv-to-AVR) is a clear no-no.

Edited by jeromelang

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