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Great HDMI cable
newmanfamilyvlogs:
If we're talking academically and in theory, the all-or-nothing view of digital IS correct, but the time domain in which it happens is not the same as how we perceive it. Stuttering sound and artifacted pictures are because most of it was there, and some of it was not versus analog where there is a procedural loss of signal which above some threshold we don't really notice.
shmokes:
I think not, because by all or nothing we mean all of the picture or none of it, when in fact the existence of artifacting means some, aka not all or nothing. Of course when talking about bit by bit it is all or nothing, but that's not what most people mean when they claim that with digital it's all or nothing.
newmanfamilyvlogs:
Err, that's kinda what I meant. ???
Howard_Casto:
--- Quote from: shmokes on March 12, 2011, 08:13:44 pm --- Because the HDMI spec is apparently robust, not because of the difference between analog and digital signals.
At least that's how it makes sense in my head.
--- End quote ---
Kinda Sorta..... I'm by no means an expert when it comes to hdmi, so some of my details could be wrong but.....
Understand that hdmi is both a digital format (like a CD, versus a record) AND a digital transmisson protocol (like TCP vs... an analog tv broadcast). Both make a significant difference, but the second one is the one that makes cable quality pretty irrelevant aside from a defective cable that simply doesn't work at all. Much like data streamed over TCP, the hdmi protocol is a "smart" protocol that streams data via packets. Even if you lose packets, the device simply re-sends them and thus it doesn't effect image quality at all, it effects transmission rate. Fortunately the transmission rate on a hdmi signal is way faster than needed (it's future-proofed for possible post-processing of the image) so even if a cable is so crappy that it loses a bunch of packets (which in and of itself is next to impossible) all the packets are going to get sent to the display eventually and in a timely enough fashion.
So yes, the robustness of the hdmi signal makes quality degredation pretty much impossible. Even so, given the digital format of the video and the short cable lengths we are dealing with, this redundancy is unnecessary as you aren't going to see any signal loss even in a streamed, non-buffered transmission.
shmokes:
That makes sense. Thanks.
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