HDMI kabel za 4K TV

hojnikb je 8. mar 2020 ob 15:06 izjavil:

Someone is gonna have to explain how bandwidth is limited on current HDMI 2.0 cables vs HDMI 2.1. For example, Belkin's future ready 8K cable (AV10175) is a skimpy 32gauge cable, whereas its 4K cable (AV10168) is 28gauge. Only in the mythical realm of audio/video (av) copper cable does shrinking the pipeline increase the bandwidth capability. Moreover, only in the mythical realm of av copper cables does the same triple shielding and bonded/twisted pairs of HDMI 2.1 cables as HDMI 2.0 equal higher protection against EMI. laws of physics simply do not support saying that a 32gauge cable one day is limited to 18Gbps then the next when wrapped up in "Ultra High Speed HDMI" label suddenly can xfer 48Gbps. I understand about shielding and "purity" of the conductor, but this is also a lot of hocus pocus. Moreover, HDMI Category 3 cable aka HDMI 2.1 cable is a performance specification, not a construction specification, which means more hocus pocus bs about needing 2.1 specific cables. Proof being that the same bonded/twisted pair cables in HDMI cat 1 passing 2.25Gbps miraculously could pass 10.2Gbps when the new standard came around, and when the new HDMI cat 2 standard came about, guess what, the same wire could pass 18Gbps. Guess what, now that 48Gbps is around, what do you think will happen? Some miraculous change in metallurgy that says 48Gbps can't pass in a 28gauge cable but can in a 32gauge cable? Last, there's no "complete" compliance testing, yet, on HDMI 2.1, so even Belkin's 8K claim isn't measured against anything.

I'm out.

Sedaj pa to trditev najdi se za 1.4 vs 2.0+ kabel. Potem bos pa aut. se bolj bos out ko bos to nasel za 1.0 vs 2.0+.

PS: frekvenca napram 2.0 je ostaka usta napram 2.1, sprememba glede na 2.0 pa je sledeca ...........The structure of the data has been changed to use a new packet-based format with an embedded clock signal, which allows what was formerly the TMDS clock channel to be used as a fourth data channel instead, increasing the signaling rate across that channel to 12 GHz as well. These changes increase the aggregate bandwidth from 18.0 Gbit/s (3 × 6.0 Gbit/s) to 48.0 Gbit/s (4 × 12.0 Gbit/s), a 2.66x improvement in bandwidth. In addition, the data is transmitted more efficiently by using a 16b/18b encoding scheme, which uses a larger percentage of the bandwidth for data rather than DC balancing compared to the 8b/10b scheme used by previous versions (88.8% compared to 80%). This, in combination with the 2.66x bandwidth, raises the maximum data rate of HDMI 2.1 from 14.4 Gbit/s to 42.66 Gbit/s, approximately 2.96x the data rate of HDMI 2.0.[124][125].......

hojnikb je 8. mar 2020 ob 16:19 izjavil:

Kr pridno prodjajate premium kable trgovci, ostali bomo pac kupl najcenejso good enough zadevo :)

da tvoja trditev natega velja samo med 2.0 vs 2.1

The structure of the data has been changed to use a new packet-based format with an embedded clock signal, which allows what was formerly the TMDS clock channel to be used as a fourth data channel instead, increasing the signaling rate across that channel to 12 GHz as well. These changes increase the aggregate bandwidth from 18.0 Gbit/s (3 × 6.0 Gbit/s) to 48.0 Gbit/s (4 × 12.0 Gbit/s), a 2.66x improvement in bandwidth. In addition, the data is transmitted more efficiently by using a 16b/18b encoding scheme, which uses a larger percentage of the bandwidth for data rather than DC balancing compared to the 8b/10b scheme used by previous versions (88.8% compared to 80%). This, in combination with the 2.66x bandwidth, raises the maximum data rate of HDMI 2.1 from 14.4 Gbit/s to 42.66 Gbit/s, approximately 2.96x the data rate of HDMI 2.0.[124][125]

hojnikb je 8. mar 2020 ob 16:27 izjavil:

pebi, wirewold got you covered. Za tiste nesigurne videofile :)
https://www.wireworldcable.com/hdmi-2.0...

Se 1x frekvenca je med standrdoma 2.0 in 2.1 enako. toliko o tvojem nivoju znanja.
Najdi isto trditev za 1.4 kabel, da bo delal na 8k 60Hz..
tezko ti bo to najti...
toliko o tvojem poznavanju...

hojnikb je 8. mar 2020 ob 16:53 izjavil:

no sj, imas premium kable, ki majo vse mozne stemple :)

Kaj ne najdes ? pa govoris oslarije... najdi za 50c hdmi 2.0 cerificiran kabel. Vsi cakamo da ne bomo strizeni kot ostale ofce.
Pa ne zahtevam kabla ki ima moznost prenadanja se etherneta.
No vsak v tej temi bi rad to od tebe da ne bo potrebno dati toliko kesa.

PS: govorimo 50c na kos ne 100k kosov.

hojnikb je 8. mar 2020 ob 17:06 izjavil:

vsak brandname kabl more bit sposobn 2.0 prenosov, ceprav pise na skatli samo 1.4 (ali se manj). Lahko se pa seveda drzite trgovcev in stempilk, pa kupujete goldplated kable z velikim 4k znakom.

Ni to mission critical industrija, kjer so certificirani kabli za dani namen bistvenega pomena.

Dej pokazi nam za 50c kabel ki podpira 2.1 feature set. Ali te je zamotilo, da se od standarda 1.4a vec ne sme oznacevati verzijo hdmi ampak zgolj feature set ?
Jaz bi res rad imel hdr 4k podprt kabel za 50c.

Sej te razumemo, ampak za visje hitrosti mora biti kabel kakovostneje prepleten, celo pa od 3 metrov naprej. Drugace ti motnje sfukajo signal, pride do data lossa med prenosom, to koncna naprava zazna in vrze ven HDR al 30Hz.(been there done that)
Ne govorim na pamet, ker sem imel na testiranju kr nekaj Premium HDMI kablov in niso delali vsi zanesljivo, ko prihaja do robnih primerov.

Za meter pa pol in 4k/60 brez hdr res ne rabi bit kakovosten kabel, ce ti je to edini kabel za omaro. Sej imas prav da digitalno je dela al ne dela, samo ni vseeno koliko paketov pri prenosu pride nemoteno do cilja, ker ce se paket izgubi ga treba poslati se enkrat in posledicno se prenos upocasni.

Do kaksnih motenj in izgub pa lahko pride zaradi interferenc pa si lahko sami pogooglate. Pri HDMI 2.1 so malenkost spremenili frekvenco in paketke, posledica je da so se bolj obcutljivi pri prenosu in se bolj nagnjeni k izgubam pr slabi kakovosti kabla, tanek, necist baker brez primernega shieldinga.

Mene tudi zanima, kje dobim za 10 eur 5 metrski hdmi kabel, ki bo _garantirano_ pod vsemi pogoji prenesel 4K/60/4:4:4 Dolby Vision.

Da ne omenjam, kako so super 10 metrski poceni HDMIji za 4K/60/HDR... Narocis 5 razlicnih pa eden pogojno dela.

Ja in iz izkusenj lazejo predvsem razni poceni kitajci najrajsi.
Malo preberes komentarje na amazonu pa je takoj vse jasno. Jaz nimam ne volje in ne casa posiljati kabel nazaj, ce je v kurcu ali pa se maje levo desno ko ga vtaknes.
No sej kot sem rekel, za meter pa pol se ne rabte neki prevec sekirat.

hojnikb je 8. mar 2020 ob 17:54 izjavil:

nekaj je 100m kabla med stenami, katerga nebos pipal ven, nekaj pa meter hdmi kabla, ki ga zamenjas v sekundi.... ta logika ne drzi vode..

Zato ker nisem tako bogat, da bi si privoscil nakup pet kablov in se zajebaval in ugotavljal kateri dela 4k hdr.

Dejstvo je, da mora hdmi kabel podpirati ti. featuer set za 2.0 ozirom ker je standard 2.1 razlikuje zgolj v metodi kodiranja "modulaciji" frekvence podatko na bakreni zici so pa enake, je vrjetnost da bo podpiral tudi 2.1 dasiravno to ne napise na samem kablu.

Dejstvo "verjetno" je tudi da mnogi nimate ne tv-ja ( prikjucenega na hifi opremo) in ali dostopa do vsebin ki podpirajo funkcionalnost ki jo judi 2.1 feature set, tako da resne dabate ali kabel standarda 1.4b za 50c lahko fura 4k hdr z vec kot 30Hz.

Vredu bi moral biti. Dražji razen boljšega občutka in lepših in debelejših kontaktov in kablov nimajo kake velike prednosti se mi zdi.
Čeprav je 2.1 vseeno malo bolj občutljiv standard, kot prejšnji HDMi standardi. So primeri na tubi, ko kabli niso ustrezni in določene probleme reši drug kabel. Vseeno, vzemi najcenejše kar najdeš.

Prosim za nasvet, kateri 3 - 5 m HDMI kabel kupiti. Povezal bi rad prenosnik, na katerem je micro HDMI izhod in 4K televizor. Pogoj je, da je kabel običajen HDMI na obeh koncih in dodaten adapter. Oba (kabel in adapter) morata podpirati:
- HDMI 2.1
- 4K / 120 Hz
- 5.1.2 zvok (Dolby Atmos)

Iščem dober price/performance. Hvala v naprej za vse nasvete!

Hvala za mnenje Niko, če bi prebral moj post, bi videl, da iščem 120Hz, ta na linku, ki si ga objavil pa podpira 60Hz, pa še ne eni strani je micro HDMI 😉

AliR je 30. jul 2022 ob 10:53 izjavil:

Hvala za mnenje Niko, če bi prebral moj post, bi videl, da iščem 120Hz, ta na linku, ki si ga objavil pa podpira 60Hz, pa še ne eni strani je micro HDMI 😉

https://www.amazon.de/-/en/gp/product/B...

Imam jih več, v različnih dolžinah. Zelo kvalitetno izdelan kabel, nimam pripomb.