Ma ahayn wakhti aad u fog ka hor markii dad badani ay ku waalanayeen telefishinada HD kuwaas oo ballan qaaday inay caddayn gaar ah u keeni doonaan khibradeena daawashada TV-ga. Qaar badan ayaa bilaabay inay xoqaan TV-ga caadiga ah ee cathode ray waxayna keeneen shaashad siman oo HD ah 1080p^{(HD 1080p)} . Laakiin, maadaama waxa kaliya ee joogtada ah ee adduunkan uu yahay isbeddel, kor u kaca TV-ga buuxa ee HD ayaa dhammaanaya, laakiin yaa eedda leh? Waa caannimada sii kordheysa ee 4K TV. Markay timaaddo xallinta TV-ga, inteenna badani waxay ku jahwareeraan inta u dhaxaysa ereyada isbeddelaya sida 4K , HDR , iyo Dolby Vision . Waa maxay faraqa u dhexeeya? Maqaalkani wuxuu ka kooban yahay dhammaan waxyaabaha aad u baahan tahay inaad ka ogaato 4K vs HDR vs. Dolby Vision .

Waxyaabaha ay ka kooban tahay tayada sawirka wanaagsan

Marka la eego hardware-ka TV-ga, 'Resolution' waxa loola jeedaa tirada pixels ee ka kooban sawirka TV-ga. Hal pixel, ama cunsur sawir gooni ah, ayaa ka kooban dhibco yaryar oo shaashadda ah.

Maanta, waxa jira go'aammo badan oo laga helay TV-yada^(TVs) flat-panel . Telefishinadii hore iyo noocyo badan oo 32-inch ah oo maanta la iibiyay waxay leeyihiin hal milyan ama wax ka badan pixels (720p). TV-yada^(TVs) u dambeeyay iyo kuwa ka yara weyn (sida caadiga ah 49 inch iyo ka yar) waxay leeyihiin wax yar in ka badan 2 milyan pixels (1080p). Xataa TV-yadii^(TVs) ugu dambeeyay ee waaweyn (sida caadiga ah 50 inch iyo wixii ka sareeya) waxay leeyihiin 8 milyan (oo loogu talagalay 4K Ultra HD ). Waxaa laga yaabaa inaad raadiso muraayad weynayn si aad u kala saarto.

Xallinta ayaa ah qeexida ugu caansan ee loo isticmaalo iibinta TV-yada^(TVs) , laakiin maaha ka kaliya ee ugu walaxda tayada sawirka weyn. Dhaqdhaqaaq sare oo kala duwan ( HDR ), saamiga guud ee isbarbardhigga, iyo midabada dhamaantood waxay door weyn ka ciyaaraan tayada sawirka.

Waa maxay xallinta 4K

Hufnaanta sawirka aad ka daawanayso shaashadda TV-gaaga, iyada oo aan loo eegin cabbirkiisa, waxay inta badan ku xidhan tahay xalintiisa. Nambarada xallinta waxay muujinayaan inta pixels ama 'dhibcood midab leh' oo yaryar oo ka kooban shaashadda TV-gaaga. Markasta oo uu nambarku sareeyo, ayaa waxa uu muujin doonaa ififaalo badan. Kiiskeena meesha ku jira waa '4K', halka TV-yada HD buuxa ay bixiyaan 1,920 X 1080 pixels, 4Ks waxay bixiyaan xallin afar jeer ka wanaagsan ^{(HD TVs)}TV-yada HD^{(HD TVs)} caadiga ah .

TV-ga 4K wuxuu soo bandhigayaa 3,840 (oo ku wareegsan 4K) jiif iyo 2,160 pixels toosan oo ah 1.78: 1 saamiga (sida caadiga ah waxaa loo yaqaan 16 × 9). Tirada guud ee pixels waa 8,294,400 (qiyaastii 8 megapixels). Way caddahay, inta u dhaxaysa HD iyo 4K, kan dambe ayaa la filayaa inuu keeno bandhig qeexan oo faahfaahsan.

HDR (Range Dynamic Sare) vs. 4K

4K iyo HDR labaduba waxay hagaajiyaan tayada muuqaalka, laakiin maaha si isku mid ah. HDR waxay u taagan tahay Range Dhaqdhaqaaqa^{(Dynamic Range)} Sare , kaas oo ka duwan xallinta. Waa tignoolajiyada tayada sawirka la xoojiyey oo soo bandhigi karta midabyo badan oo nolosha u eg iyo sidoo kale dhalaalka sare iyo heerarka isbarbardhigga marka la ciyaarayo waxyaabo ku habboon HDR .

Daawashada ilaha fiidiyooga ee HDR -encoded ee TV karti u leh ^(HDR)HDR waxay bixin kartaa kala duwanaansho sawir oo aad u ballaaran - farqiga u dhexeeya madowga ugu qoto dheer iyo caddaanka ugu cadcad ayaa si cad loo arki karaa. HDR sidoo kale waxay hubisaa in midabada TV-gaagu u muuqdaan kuwo muuqda oo sax ah.

Marka la barbardhigo 4K, kor u qaadida sawirka HDR waxay noqon kartaa mid cajiib ah, oo wax badan oo la fahmi karo. Laakiin mar labaad, in kasta oo dhammaan telefishannada 4K ay aqoonsan karaan xogta sawirka HDR ee kala duwan , qaar badan ma bixin karaan saameynta buuxda.

Dhammaan TV-yada HDR -yada leh looma wada sinneen

Waxqabadka HDR^(HDR) ee wanaagsan wuxuu u baahan yahay laba shay shaashadda TV-ga:

1. Awood si aad u dhalaaliso
2. Awoodda muujinta madow qoto dheer

Tan waxa loo tixraacaa 'Brightness Peak' waxaana lagu cabbiraa 'Nits'. Maanta, xitaa marka tignoolajiyada HDR laga helo ku dhawaad ​​dhammaan telefishinnada casriga ah ee 4K, kuwa aan qaaliga ahayn ayaa ka maqan hoos-u-dhac maxalli ah ee labada aag ee kor ku xusan. Si kastaba ha ahaatee, dhexda ilaa heerka sare ee TV-yada LED-LCD^{(LED-LCD TVs)} iyo moodooyinka OLED ayaa aad uga sarreeya muujinta faa'iidooyinka HDR .

Waa maxay Dolby Vision

Marka TV-yada 4K la barbardhigo, waa wax caadi ah in ay la kulmaan afar nooc oo HDR ah, oo ay ku jiraan HDR10 , HLG ( Hybrid Log-Gamma ), Advanced HDR by Technicolor® iyo Dolby Vision ™ . Kuwaas oo ka mid ah, HDR10 iyo Dolby Vision ayaa ah qaababka ugu muhiimsan.

HDR10 waa qaabka ^(HDR10)HDR ee ugu caansan waxayna ku qasban tahay saxannada Ultra HD Blu-ray . Dolby Vision waxay ku jirtaa nuxurka laga daawado Netflix^(Netflix) iyo Amazon , oo dooro cinwaannada Ultra HD Blu-ray . Faa'iidada ugu weyn ee Dolby Vision ee ka sarreeya HDR10^(HDR10) waa ku darida xogta firfircoon ee xogta sawirka HDR ee asaasiga ah. ^(HDR)Taas oo^(Which) macnaheedu yahay, HDRXogta badan waxay u sheegi kartaa TV-ga inuu beddelo kala duwanaanta dhalaalka goob-muuqaal ama xitaa qaab-qaab-jir ah. Qaybta ugu cajaa'ibta badan, waxa ku jira waxa lagu bartay midab 12-bit ah iyo dhalaalka ugu sarreeya ee 4000 nits - Waxaa xusid mudan, TV-yada hadda jira oo si buuxda u soo saari kara noocyadan.

Erayada fudud, Dolby Vision waa shidaalka jet-engine-ka kaas oo awood u leh waxyaabaha ugu muuqaalka wanaagsan adduunka. Waa qaabka ay in badan iyo in ka badan istuudiyaha u soo jeesanayaan oo isku xiraya awooddeeda si ay u soo bandhigaan sawirro midab leh, firfircoon, iyo kuwo la xisaabiyay oo ku salaysan muuqaal-muqaal.

Dolby Vision vs. HDR vs. 4K - Xariiqda hoose

Dolby Vision waa mid^{(Dolby Vision one)} ka mid ah horumarka ugu beddelka ciyaarta ee telefishanka. Shaki la'aan, 4K waxay ina siinaysaa pixels-ka dheeriga ah, laakiin waa HDR ka dhigay pixels kuwa u iftiimaya sidii ayan hore u samayn. Ugu dambeyntii, waxaas oo dhan waxay ka muuqanayaan TV-gaaga.

4K vs HDR vs Dolby Vision: What to choose for the best experience?

It wasn’t too long ago when many people werе gоing crazy over HD televisions which promised to bring exсeptional clarity to our TV viewing experience. Many started scraрing the conventional cathodе ray tube TV’s and brought flat sсreen full HD 1080p TV.  But, since the only constant thing in this world is change, the ascendency of full HD TV is coming to an end, but who’s to blame? It’s the increasing popularity of 4K TVs. When it comes to TV resolution, most of us get cоnfused between trending terms like 4K, HDR, and Dolby Vision. What is the difference between them? This article is packed with all the things you need to know about 4K vs. HDR vs. Dolby Vision.

Ingredients of good picture quality

In terms of TV hardware, ‘Resolution’ refers to the number of pixels which composes the picture on the TV. A single pixel, or discrete picture element, contains tiny dots on the screen.

Today, there are abundant resolutions found on flat-panel TVs. Older televisions and many 32-inch models sold today have a million or so pixels (720p). More recent and slightly bigger TVs (typically 49 inches and smaller) have a little more than 2 million pixels (1080p). Even the latest bigger TVs (typically 50 inches and above) have 8 million (for 4K Ultra HD). You might have to look for a magnifying glass to distinguish between them.

Resolution is the most common specification used to sell TVs, but it isn’t the single most ingredient for great picture quality. High dynamic range (HDR) performance, overall contrast ratio, and colors all play a big role in picture quality.

What is 4K resolution

The clarity of the image you are viewing on your TV screen, irrespective of its size, depends largely on its resolution. The resolution numbers indicate how many pixels or tiny ‘colored dots’ make up your TV screen. The higher the number, the more vivid the display will be. Our case in point is ‘4K’, while the full HD TVs offer 1,920 X 1080 pixels, 4Ks offers a resolution that is four times better than the conventional HD TVs.

A 4K TV displays 3,840 (which is around 4K) horizontal and 2,160 vertical pixels in a 1.78:1 aspect ratio (more normally referred to as 16×9). The total number of pixels is 8,294,400 (around 8 megapixels). It’s quite clear, between HD and 4K, the latter is expected to deliver more defined and detailed display.

HDR (High Dynamic Range) vs. 4K

4K and HDR both improve video quality, but not in the same way. HDR stands for High Dynamic Range, which is different than resolution. It is an enhanced picture quality technology that can display more life-like colors as well as higher brightness and contrast levels while playing HDR-compatible content.

Watching HDR-encoded video sources on an HDR-capable TV can provide a much wider range of picture contrast — the difference between the deepest blacks and the brightest whites is clearly visible. HDR also ensures your TV colors appear more vivid and accurate.

When compared to 4K, HDR’s picture enhancements can be dramatic, and much more perceptible. But again, although all 4K televisions can recognize the distinct HDR picture data, many can’t deliver the full impact.

Not all TVs with HDR are created equal

Good HDR performance demands two things from a TV screen:

1. Ability to get very bright
2. Ability to display deep blacks

This is referred to as ‘Peak Brightness’ and is measured in ‘Nits’. Today, even when HDR technology is found on virtually all modern 4K televisions, the inexpensive ones lack local dimming’s in both the areas mentioned above. However, mid-to upper-range LED-LCD TVs and OLED models excel in demonstrating the HDR advantages.

What is Dolby Vision

When 4K TVs are compared, it is common to come across four different HDR formats, including HDR10, HLG (Hybrid Log-Gamma), Advanced HDR by Technicolor® and Dolby Vision™. Out of these, HDR10 and Dolby Vision are the most important formats.

HDR10 is the most common HDR format and is compulsory for Ultra HD Blu-ray discs. Dolby Vision is available on streamed content from Netflix and Amazon, and select Ultra HD Blu-ray titles. The most substantial advantage of Dolby Vision over HDR10 is the addition of dynamic metadata to the core HDR image data. Which means, the HDR metadata can tell the TV to change brightness range on a scene-by-scene or even frame-by-frame basis. The most impressive part, content is mastered with 12-bit color and peak brightness of 4000 nits – Notably, no current TVs can fully reproduce these ranges.

In simple words, Dolby Vision is the jet-engine fuel which powers the best-looking content in the world. It is the format which more and more studios are turning to and connecting its potential to deliver colorful, dynamic, and calculated images on a scene-by-scene basis.

Dolby Vision vs. HDR vs. 4K – The bottom line

Dolby Vision one of the most game-changing advancements to the television. Unquestionably, 4K gives us those additional pixels, but it is HDR that made those pixels shine out like they never did before. Ultimately, all of this shows up on your TV.

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