什么情况，福布斯爆今年LG全系列电视不支持完整的HDMI 2.1

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意思是今年的HDMI 2.1并不是完整的规格？

https://www.forbes.com/sites/joh ... mi-21/#1333d3706276



LG’s 2020 4K OLED And LCD TVs Don’t Support Full HDMI 2.1


The seemingly endless confusion surrounding the specifications of HDMI 2.1 connections has struck again. And this time the source of the confusion is the one brand that had previously declared itself above the whole HDMI 2.1 mess: LG Electronics.

LG has contacted me today to say that contrary to initial communications, and in a turn around from the HDMI 2.1 situation introduced with its 2019 4K TVs, none of its 2020 4K TVs, OLED or LCD, will carry ‘full bandwidth’ HDMI ports capable of handling HDMI 2.1’s maximum 48Gbps data rate.

The 48Gbps rate is required to handle uncompressed 12-bit 4K at 120Hz with RGB 4:4:4 chroma sampling. LG tells me now, though, that while all the HDMIs on its premium 2019 TVs were indeed full 48Gbps examples, all four HDMIs on the WX, GX and CX OLED TVs will instead handle 10-bit (rather than 12-bit) 4K at 120Hz with RGB 4:4:4 chroma sampling. This implies a likely 40Gbps data rate.

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On LG’s BX OLED and the NANO91, NANO90 and NANO86 LCD TVs (which use LG’s Alpha 7 Gen 3 processor, rather than the Alpha 9 Gen 3 processor found on the premium OLEDs) you will get two HDMI 2.1 ports capable of 10-bit 4K at 120Hz with RGB 4:4:4, and two lower bandwidth ports that max out at 4K/60P with 8-bit RGB 4:4:4.

There’s no getting round the fact that the HDMI situation with LG’s 2020 4K TVs is a pretty big turn around from the brand’s 2019 position, where it was very vocal about its desire to reduce the confusion and worry associated with buying a new TV by simply offering full HDMI 2.1 support when most of its rivals did not. So why the change of heart?

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Here’s the official statement LG shared with me:

“While LG covered most of the HDMI 2.1 related specs in its 2019 TVs, including full bandwidth support in all of the HDMI ports for its 4K and 8K TVs, the market situation evolution indicated that real content that requires 48Gbps is not available in the market.

Based on market situation, LG decided to re-allocate the hardware resources of 2020 chipsets optimizing for AI functions including CPU&GPU and supporting full bandwidth in only 2 ports of 2020 8K TV series (ZX series, NANO99, NANO97, NANO95). And the rest of the ports of 8K TVs and all HDMI 2.1 ports of 4K TVs have lower bandwidth than 48 Gbps but support up to 4K 120P 4:4:4/RGB 10bit. We apologize for not flagging this earlier to you.”

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In other words, according to LG’s statement, the brand believes it can deliver better performance through its ‘intelligent’ automatic audio and visual adjustment systems if it takes processing capacity away from the HDMI 2.1 inputs and makes it available to the TVs’ AI systems instead. And that it thinks this is OK to do because there’s little evidence of sources arriving that will take advantage of the full 48Gbps HDMI 2.1 data rate capacity.

It’s interesting to note from the statement, too, that LG is now only claiming that two of the HDMIs on its 2020 8K OLED and LCD TVs will be full bandwidth 48Gbps connections capable of 12-bit 8K/60Hz at 4:2:0 YCbCr. The other two will be top out at 10-bit.

So what does this all mean in practical terms? Well, while we don’t yet know for certain the absolute maximum potential output capability of the next generation of consoles, it seems likely that a TV being able to support 10-bit 4K at 120Hz with 10-bit RGB 4:4:4 will be enough to get the job done.

Even if a game was potentially able to up its output to 12-bit, it’s perhaps debatable how visible the difference would be given that all TVs are currently only 10-bit. And LG (and other brands taking a similar not-quite-full-48Gbps-approach to HDMI 2.1 this year) might argue that it can make a more visible difference with the extra power it’s making available to its video processing systems by limiting the HDMI 2.1 bandwidth.

Ultimately, though, I guess only time - and the arrival of the next generation of games consoles - will tell if LG’s abrupt change of tack was the right thing to do.

—

Naturally I will be updating my recent review of the LG 65NANO906 to reflect the new connectivity information, as well as my LG 2020 TV range overview article. Links to these articles are below, as well as to a couple of other articles you might find interesting.

wlwlwl1313

看了下ID，放心食用，就怕那个疯子
等买2.1的显示器

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wlwlwl1313 发表于 2020-5-5 09:57
看了下ID，放心食用，就怕那个疯子
等买2.1的显示器

建议等等 等主机和电视出齐了再看看
有可能主机也不是完全版的HDMI2.1 那样倒也是无所谓
就怕一个是 一个不是，然后兼容性问题一来
再来个无法软升级，那会不可能重新买吧

jack424800

今年感觉就是真正的过渡年，厂商也有可能考虑到疫情的问题，可能会各种影响销量吧。。iphone12同理，虽然回归高通基带，但不是所有东西回归之后都会跟以前一样的。。。

狂风007

看了一下这篇文章。


就是说2020年款带宽是40GB左右，处理10位（而不是12位）的4K。 120Hz RGB 4：4：4色度采样。

还是比2.0的18GB带宽高很多了。
在乎这个的买2019年款就行了吧，还便宜点。

感谢楼主提供消息，LG今年这么搞有点没想到。

zjpsx

所以说sony连5元rmb的千兆网口都要省，lg不可能那么傻，傻一代就够了，不可能一直傻。c9p，真香。



再怎么缩，也足够**友商产品了。

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意思就是低规格的2.1了，起码带宽翻了一倍4k120hz不是问题了，当然我是不信主机能做到这个输出的，所以早就买了2.0的显示器了

狂风007

zjpsx 发表于 2020-5-5 10:35
所以说sony连5元rmb的千兆网口都要省，lg不可能那么傻，傻一代就够了，不可能一直傻。c9p，真香。

哥们你说对了，还真有点这个意思。

看原文说的，LG今年缩水到40GB带宽，第一就是因为市面上没有其他电视厂家提供完整的HDMI2.1接口，仅有LG一家提供；第二是因为LG认为市面上几乎没有完整用到48GB带宽的视频源，有点浪费。于是今年缩水到40GB带宽，把电视芯片多余的硬件资源运算能力用到其他方面，比如人工智能学习上了。

说白了就是没竞争，于是今年挤牙膏甚至开一点小小的倒车。

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狂风007 发表于 2020-5-5 10:54
哥们你说对了，还真有点这个意思。

看原文说的，LG今年缩水到40GB带宽，第一就是因为市面上没有其他电视 ...

我也觉得主机不可能提供完整的2.1
但是也不排除
40GB按道理也够用

就是怕后期不兼容，硬件不兼容老恶心的，到时候你不可能为了接口换台电视
大厂还经常搞这套

狂风007

lovinglili 发表于 2020-5-5 10:57
我也觉得主机不可能提供完整的2.1
但是也不排除
40GB按道理也够用

40GB按道理说，支持到4K 120HZ 10BIT  RGB4 4 4也够了，我觉得PS5输出4K 120HZ 12BIT  RGB4 4 4的可能性不大。

你说的兼容性问题的确存在，不过我觉得2.1连带宽18GB的2.0都是向下兼容的，所以我觉得兼容性应该没都多大问题，最多就是12BIT的视频源输出，在电视上以10BIT显示而已。

不过最好还是等年底PS5出了再看看吧，到时肯定很多媒体评测玩家心得这些。