You Asked: All about the acronyms, baby - Beritaja

On this section of You Asked, buckle up for an on-the-road version that’s each astir acronyms and The troubles folks are having pinch them. ABL connected OLEDs, APL, really HDR and WCG are not 1 and The same, MLA sheet technology, and, of course, eARC.

As you Can astir apt tell, I’m walking (or I was — betwixt The magic of publication dates and my crazy schedule, you Can ne'er beryllium sure). If you perceive honking horns, emergency conveyance sirens, aliases aggravated pedestrians in The background, kindly do maine a favour and fuhgeddaboudit. Hey … erstwhile in New York, right?

Can SDR contented trigger ABL connected OLED TVs?

David Cobham in Ontario, Canada, is an crystal lucky instrumentality who is concerned astir ABL, which stands for car brightness limiter. David is leaning toward an OLED for his caller TV, but is confused arsenic to whether ABL applies to SDR contented (that’s modular move range, or, really, non-HDR — precocious move scope — content). Specifically, he intends hockey! The past point he wants is for each that gleaming achromatic crystal to origin his TV to dim erstwhile he’s watching games — which I stitchery he does a lot.

Thanks for your question, David! First, I’m going to explicate ABL, and past we’ll get to your circumstantial concerns.

Auto brightness limiter is simply a characteristic that was created for OLED (organic light-emitting diode) TVs. As conscionable pointed out, The O in OLED stands for organic. And arsenic integrated beings, we are very acquainted pinch The biologic imperative that is aging and death. The integrated compounds that make ray in an OLED TV do deterioration down complete time. And conscionable arsenic accent accelerates aging in humans, it accelerates The degradation of The integrated compounds in an OLED TV. In different words: The harder you thrust an OLED TV, The faster it will deterioration out.

To prolong The life of OLED TVs, an algorithm detects erstwhile an OLED TV is being driven difficult for agelong periods of time, which is an important qualifier. It past reduces The brightness of The TV automatically. That’s ABL.

The bully news is that arsenic OLED TV tech has advanced, car brightness limiting has been relaxed rather a bit. But if there’s 1 type of contented that you Can count connected to trigger ABL, it’s hockey, which has a batch of agleam achromatic in it. And, unfortunately, lucky tends to make The car brightness limiter much evident because our eyes are delicate to reductions in achromatic ray brightness.

Over The years, I’ve tried to see an ABL trial in my reviews, but it’s less urgent of an rumor these days. I suppose I should see stress-testing each OLED for ABL, but I conscionable don’t spot it anymore in astir types of content.

Now, let’s reply David’s question: Yes, SDR contented Can trigger ABL. In fact, ABL doesn’t attraction whether you’re watching SDR aliases HDR. It cares astir really agleam The TV is being asked to be. There’s this conception that HDR contented is universally brighter, and that is not The case. HDR unlocks much move range. And, yes, that intends The brightest brights Can beryllium brighter. But HDR contented is not brighter each The time. In fact, immoderate folks kick that HDR contented really is much dim.

So it really depends connected really agleam you group up your OLED to beryllium erstwhile it is playing HDR content. If you max retired The OLED ray level, and you prime options for illustration “brightness preferred” aliases HDR highest brightness group to high, past your SDR contented will person a precocious mean image level. That’s APL, which is measurement excessively adjacent an acronym to ABL.

With that said, I don’t deliberation you’ll find that watching lucky intends your TV is perpetually dimming. The TV is going to get capable breaks showing player’s uniforms, The crowd, and The commentators, and The ABL is little apt to beryllium triggered. If you region connected a very agleam infinitesimal in The game, you would spot The image dim slow complete time. But this rumor wherever The TV slow dims complete clip and ne'er brightens up? That’s a bug that was recovered in a very fewer TVs, and it was fixed.

So, from an ABL perspective, I deliberation you’re safe going pinch OLED. It’s really The imaginable for burn-in that I’d beryllium reasoning about. If you person lucky connected The TV 8 to 10 hours a day, 4 aliases much days a week, that people and accusation ticker down astatine The bottommost of The TV could origin burn-in. But, hey, if you’re worried astir that, you Can ever bargain an LG G4. It’s sewage a five-year warranty that covers burn-in.

---

Wide colour gamut and HDR

Jay asks: Wide colour gamut has ever been promoted arsenic an advantage of HDR video. Very rarely, though, person I ever heard it discussed in TV aliases video reviews aliases promoted by TV manufacturers. All The chat astir HDR seems to halfway connected brightness and specular highlights, not The improved colors complete SDR. So my mobility is do movie and video makers person to purposely scheme for and sprout in a wide colour gamut, aliases do those other colors conscionable “magically appear” erstwhile watching HDR video? Are we often watching HDR video that does not return advantage of WCG?

We often do spot HDR and WCG, aliases wide colour gamut, mentioned in The aforesaid breath. But, in fact, HDR and wide colour gamut are not intrinsically linked. Technically speaking, you Can person HDR without wide colour gamut, and you Can person wide colour gamut without HDR. But The measurement contented is packaged up, we simply don’t spot wide colour gamut contented coming crossed without HDR.

Wide colour gamut refers to a TV’s abilities to nutrient much colors than was imaginable from The pre-ultra-high-definition days. Broadcast, DVD, and Blu-ray discs were erstwhile capped astatine sRGB aliases Rec.709, which are represented by The smaller rectangles connected The colour gamut chart.

With Ultra HD, we sewage wide colour gamut, which expanded The scope of colors retired to this larger triangle connected this colour chart. We telephone this colour modular DCI-P3, aliases conscionable P3 for short. And since we’re doing acronyms today, I’ll mention that The DCI in DCI-P3 stands for Digital Cinema Initiatives.

Apple

So, while HDR Can person an effect connected colour brightness and colour volume, HDR is astir move scope of brightness, and not expanding a colour palette. Wide Color Gamut increases The scope of colour shades by having a higher spot extent — expanding from 8-bit colour to 10-bit color. HDR intends a wider scope of colors, and WCG intends much shades of The colors in that range.

The contented seizure — astatine slightest for movies — was ne'er a limitation. It’s ever been The transportation system. Ten-bit colour requires a batch of retention abstraction aliases a batch of net bandwidth to beryllium delivered. And 4K Blu-rays and modern streaming services made it imaginable for america to get contented pinch wide colour gamut. And it ever comes pinch HDR, too.

But The TV needs to beryllium capable to propulsion disconnected wide colour gamut. That’s what makes quantum dots truthful desirable. The quantum dots thief grow colour gamut and colour measurement by making a much axenic achromatic ray from which colour filters make colors. OLEDs person people amended colour purity and are besides Can of wide colour gamut.

Anyway, dream that is helpful. And to immoderate colour scientists retired there: Please forgive maine for watering down this explanation. I’m alert location is simply a batch much to it. But, we’re tying to support it astatine The 101 level here.

---

Any downsides to MLA OLED technology?

LG G4 OLED Douglas Murray

Roy Rosenthal writes: I bask You Asked a lot. My mobility is astir LG MLA technology. All of The reviews make it sound great. But is location immoderate downside to MLA? For example: Is The off-axis viewing that is truthful bully pinch regular OLED affected? Or is location immoderate benignant of contented that MLA doesn’t grip well? Or is it conscionable a axenic win?

I’ve conscionable gotten done testing The LG G4 OLED, which has LG’s MLA panel. And adjacent arsenic I Can tell, MLA is conscionable a axenic win. I don’t spot immoderate issues inherent to The implementation of The micro lenses that dress up MLA. And possibly that’s owed to really MLA works.

We person a full explainer connected MLA, but The short type is that MLA stands for micro lens array and refers to a furniture in definite premium OLED panels that contains billions of mini lenses — they measurement in micrometers — to attraction ray retired to The viewer. MLA helps OLED TVs beryllium brighter simply by funneling ray retired to The spectator that different is typically scattered and lost. It’s for illustration reclaimed ray output. And it doesn’t look to get in The measurement of thing astatine all.

---

eARC connected HDMI 2.1 ports

Riley Young

Bruce Macartney-Filgate writes in pinch questions astir eARC, which stands for enhanced Audio Return Channel. Bruce’s mobility is astir why he truthful commonly hears reviewers specified arsenic myself complaining astir a TV’s eARC larboard taking up 1 of a TV’s HDMI 2.1 ports erstwhile he thinks that would beryllium an advantage for folks utilizing an A/V receiver arsenic a video switcher.

Bruce is right. For anyone who is going to usage an HDMI 2.1-capable A/V receiver arsenic a video switcher — which intends you would plug each The root devices, for illustration crippled consoles, Blu-ray players, streaming boxes, and possibly a cablegram aliases outer container into it — it would beryllium an advantage for The TV’s eARC larboard to besides beryllium an HDMI 2.1 port.

Also, for those of you not acquainted pinch eARC aliases ARC in general: Audio return transmission is what allows an HDMI relationship to beryllium a two-way street. HDMI cables usually transportation awesome in 1 direction, from a root to a show aliases sound device. It gets a awesome from constituent A to constituent B.

ARC and eARC let for a video and audio awesome to spell 1 measurement — we’ll telephone it upstream — and for an audio awesome to spell The other way, aliases downstream. This way, folks Can get sound from their TV — whether it’s from built-in apps aliases from immoderate devices connected to The TV — into a soundbar aliases receiver. And, finally, The e in eARC stands for enhanced, and it conscionable intends that it Can transportation much information, truthful you Can get lossless, uncompressed audio down The pipeline.

Now, a speedy reminder for everyone: The only devices that occasionally request an HDMI 2.1 larboard are The Xbox Series X aliases S, The PlayStation 5, aliases a high-end gaming PC. That’s because those are The only devices that Can connection 4K image solution astatine 120Hz, truthful they request The other bandwidth afforded by HDMI 2.1

So, if you had much than 1 of those 3 devices and an A/V receiver, past you would beryllium happy that The eARC larboard was besides HDMI 2.1

But for a batch of folks, that eARC larboard is going to beryllium utilized pinch a soundbar aliases possibly an A/V receiver aliases preamp/processor that doesn’t grip HDMI 2.1. In those cases, if you had much than 1 of those typical devices that request HDMI 2.1, past you would want them to beryllium free connected your TV, independent of The eARC port, because each The eARC larboard needs to do is get awesome audio to your soundbar, aliases receiver.

Editors' Recommendations

• Android users yet get YouTube TV parity pinch iPhone
• You Asked: The Moire effect strikes, open-box TV tips, and where’d The curves go?
• YouTube conscionable massively angered Apple fans by adding a feature
• Yes, YouTube TV is benignant of surgery tonight
• You Asked: QLED and mini-LED burn-in, missing HDR, and Apple TV and HDMI 2.1

Editor: Naga



Read other contents from Beritaja.com at