Gaming tv

[Shifty Geezer]

Then you only can test the input lag on the analog inputs, not on the HDMI input.

You can output the same signal to analogue and digital outputs and measure the latency (from a PC. Don't think any consoles support dual display output). There shouldn't be any latency on the digital out so the end result will be latency of the digital input on your digital TV vs analogue input on analogue CRT (effectively zero).

IIRC Digital Foundry used a device that was using LEDs to show the exact moment when a controller button was pressed and then slow motion video was analyzed to determine the latency. Although they've used it on games only and not on the TV set itself.

Yes. There's a widget you can buy that shows inputs, allowing measure of round-trip latency from game input to display output when used with a camera and frame-counted. If you already know the latency of the display, you can determine game latency, but you can't really get the display latency from using this controller without some sort of test app where you know the input latency. I suppose a known quantity like maybe a fighter with 1/60th latency could be used to count lag until output.

 

[tuna]

You can output the same signal to analogue and digital outputs and measure the latency (from a PC. Don't think any consoles support dual display output). There shouldn't be any latency on the digital out so the end result will be latency of the digital input on your digital TV vs analogue input on analogue CRT (effectively zero).

Then you must be sure that there is no latency in the digital->analogue conversion inside the PC.

Also, it is very probable that TVs have different latency depending on what signal they get (720p, 1080p 3D etc). If you are going to do an input lag test you should test all (or be specific about what you actually tested).

 

[Shifty Geezer]

Then you must be sure that there is no latency in the digital->analogue conversion inside the PC.

There's no reason for there to be. The image is stored as the front buffer. That's sent out the output. The analogue is simply a DAC operating at the same sync as the TV refresh, scanning through the buffer and sending an analogue value for each pixel. There's a small latency measured in clocks which shouldn't get anywhere near 1ms. Digital will also have a latency measured as the time taken to send the complete image and fill a buffer on the TV ready for swapping. I assume no digital TVs render scanlines as they receive them - is HDMI even capable of that sort of signalling? There's a potentially lag in filling a digital buffer prior to sending too. I don't know enough about the specifics of the electronics to answer that one.

Also, it is very probable that TVs have different latency depending on what signal they get (720p, 1080p 3D etc). If you are going to do an input lag test you should test all (or be specific about what you actually tested).

Sure.

 

[Cheezdoodles]

Bought the e6500.

If anyone got any better suggestions i can easily cancel the order! Norwegian law is awesome 14 days open purchase by law