Re:Displayport: A Better Video Interface
by aidenn0 on Tuesday July 11, 2023 @12:25PM
(#36683288)
I plug my computer into my AV receiver all the time, and my speakers are worth more than my TV.
[ Parent
| on HN ]
If your receiver doesn't support eARC, you are definitely not getting full resolution audio.
I don't use ARC at all (all audio sources go through the receiver), so that's a non-issue for me.
That's fine. Let me rephrase: if you're not using the latest and greatest HDMI protocol you're not getting full fidelity audio.
Besides the DTS passthrough (which works just fine), it supports 48kHz PCM from my media-center, so I don't know what more is needed.
Re:Displayport: A Better Video Interface
by bleepblop on Wednesday July 12, 2023 @04:05AM
(#36691660)
Again, that is fine. Besides getting an uncompressed 2 channel signal; anything above 2 channels is going to be compressed and frequencies carved out of the additional channels due to the encoding process. Thus a loss of fidelity. You "may" get a multi channel signal, but it is not 1:1. There are plenty of papers written about the subject since it's nearly a 50 year old technology.
My laptop definitely supports up to 8 channels (7.1) of uncompressed PCM over HDMI. I've tested my receiver up to 5.1 (I don't have an 8-speaker setup) and it works.
[edit]
I have an Intel IGP; Intel has supported this since the G45 (Core 2 Duo era), AMD added it in the HD 4800 era, and nVidia in the GeForce 8300 era. Support for this is over a decade old at this point.
The "stereo only uncompressed" is a S/PDIF legacy, and while HDMI does support S/PDIF, it was already "the bad old way" when Bluray players came out (though it took a few years for discrete GPU makers to catch up).
Re:Displayport: A Better Video Interface
by bleepblop on Wednesday July 12, 2023 @04:50PM
(#36701474)
Might I suggest reading up on how both DTS and Dolby encode audio then.
DTS and Dolby are unrelated to uncompressed LPCM. HDMI 1.0 supports up to 8-channels, up to 192kHz, and up to 24-bits of depth. In practice, my laptop to my receiver can definitely do 24-bit 48kHz PCM at 8 channels, and that's certainly "full fidelity" for most setups.
Re:Displayport: A Better Video Interface
by bleepblop on Wednesday July 12, 2023 @08:38PM
(#36703615)
If you're sending audio and audio only then sure. Wouldn't be my solution from my professional opinion though.
Uncompressed multichannel LPCM works along-side video just fine. The only thing you have said in this thread that is true has been about eARC/ARC, yet you've doubled-down on your statements even when I made it clear that I'm not using ARC.