Comments on: 3D HDTV and HDMI Explained

By: Lindey Cloud

Lindey Cloud — Thu, 19 Jan 2012 20:37:53 +0000

I am considering buying a product which will convert an HDMI 1.4 signal to a 1.3 device. As I understand it, this device splits the left and right 3D frames and sends them to the projector. You can then use an emitter and glasses to block the left and right frame as appropriate. If I understand this correctly, this should give you full 3D resolution as you are viewing 1920×1080 in each eye. So, instead of sacrificing resolution, you sacrifice v-sync rates per eye. This leads me to my question that has to do with vertical sync rates and frames per second (assuming I’ve got things correct above). My projector has a v-sync rate of 100Hz max. The “Theater” box (by a company called 3DNow) will support a v-sync of 96Hz. Initially, I figured “okay, I should get 2 frames per eye every 1/48 of a second; that works out nice and I don’t have to think about these 3/2 pull down issues I’ve been hearing about (and not entirely sure I understand completely, but think it has to do with fps and v-sync rates)”. When I saw the diagram at the top of your page and saw “active blanking” of 45 pixels (1/24th of the v-sync rate, got to thinking “It seems like you’d have to add 1/24th (or 100 rather than 96Hz) to the v-sync rate to make frames match up exactly with the refresh rate. Am I missing something? Also, I don’t understand why you are saying 2205 pixels vertical total between two frames. Shouldn’t it be 2250 as you’re talking about 2 frames but only 1 active blanking section?

I’m an engineer, but don’t know much about video.

Hope this makes sense….

By: Nahiko

Nahiko — Tue, 03 Jan 2012 16:50:00 +0000

Hi Mr Guru :-)

Does all this info mean, that if a HDMI cable is marked as HDMI 1.4, it might not be suitable for full3D?

Cheers and thanks!!

There is no designation for 1.4 cables from HDMI licensing. If it is a “Hi Speed” HDMI cable (which is the proper labeling), it is compatible with all 3D source signals.

HD Guru

By: Kurt

Kurt — Thu, 29 Dec 2011 23:43:27 +0000

I really appreciate the information on your site. I was recently told at a Best Buy store that I needed 13Gbps or higher to prevent 3D pixilation problems. Your site seems to clear that up.
My question is about Ethernet connectivity. If both my devices have the capability (wireless) and I only use a High Speed cable, what capabilities do I give up?
Thanks Again!

By: Maurice

Maurice — Thu, 14 Apr 2011 00:30:24 +0000

I have a vizio 3D hd tv and I try to watch the 3d show i downloaded off of netflix but the image is just spit in half no real 3d effect and even useing the glasses the image dosnt come together. I got hmdi cables at wal-mart but didnt pay attention as to the rate. could the cables be the problem as to why the 3d dosnt work like it should or do I need to try and 3d dvd and c if it works.

By: joel

joel — Thu, 31 Mar 2011 23:07:09 +0000

I’m an owner of a Yamaha z-11 and have no intension of replacing it with a 3d ready receiver. The only thing stopping me from getting the adapter for my Mitsubishi 3d ready wd73833 is a way getting hd audio to my receiver. You mentioned panasonic may have a solution but I don’t know what model you are referring to in your” walk around” notes. I don’t think I’m alone in this matter. Any updates?

By: NeilB

NeilB — Wed, 30 Mar 2011 21:40:59 +0000

Hello

Might be a simple question. I am connecting my ps3 to my new 3d Tv (samsung ue46c8000) using a new 1.4 hdmi cable. The cable will display the playstaion menu at 720p@60hz but not 1080p@60hz, but will display 1080p@24hz – do you know why this is ?

By: Kevin

Kevin — Tue, 08 Feb 2011 15:35:46 +0000

I have a Sony kdl55810nx and have a few movies in 3d hooked up with hdmi 1.4 cables there is no setting for the 3d so any side by side 3G won’t work why

By: Shashi Naraine

Shashi Naraine — Sun, 26 Dec 2010 23:49:28 +0000

I’ve purchased a 55′ Sony LED 3D TV. Do I need a 3D HDMI cable to connect it to my cable box as well as my playstation 3 to use the 3D functionality? Or can I just use my existing high speed HDMI cable?

Any “hi-speed” HDMI cable will handle 3D signals for any 3D TV. The labeling of an HDMI cable as “3D” is just marketing tool used by the cable maker and does not denote the cable’s ability to handle 3D signals.

HD Guru

By: Luke

Luke — Thu, 16 Dec 2010 04:19:25 +0000

Will a 50 Feet 1.4HDMI cable running from my AMP to Plasma T.V (Currently doing now) Still work if I connect it to a 1.3HDMI splitter/

Cheers

No simple answer. I assume you really mean an HDMI distribution amplifier. Connecting a second display could run into problems such as EDID conflict. Consult the HDMI distribution amplifier maker for advice.

HD Guru

By: JD

JD — Sun, 04 Jul 2010 16:45:35 +0000

I know 1.3 A/V/R’s are not supposed to work right with 3D, so why does my Marantz SR2008 seem to work ok with 2010 Sammy 3D Plasma? I only have one HS HDMI cabel out to TV from my A/V/R with Directv and PS3 running straight to my A/V/R and then no HDMI to Tv directly but is going through my Marantz. I am getting all 3D video and audio from Directv and games from PS3. Can you explain why it is working if it isn’t supposed to be unless one is going from source straight to TV (and not go through reciever)?

Thanks,
JD