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Location: Saint Louis, MO
Member Since: Sat May 17, 2008
Posts: 2,478
In Reply To
The Black Guardian

Location: Paragon City, RI
Member Since: Sat May 17, 2008
Subj: Re: What is refresh rate and response time on HDTVs?
Posted: Wed Dec 30, 2009 at 08:01:17 pm EST (Viewed 641 times)
Reply Subj: Re: What is refresh rate and response time on HDTVs?
Posted: Wed Dec 30, 2009 at 05:31:36 pm EST (Viewed 690 times)


      this time last year, while at my girlfriend/fiancee's family, i was watching National Treasure 2 on Blu-ray on their (then) new 46" Samsung. there seemed to be this strange effect while watching it--something about the animation itself that i can't quite explain--sorta like there was no blur (maybe?), or that the animation was too quick for my eyes (again, i can't really explain it).


        anyway, just over Black Friday we bought a 40" Samsung ourselves. while the picture is as crisp as the picture we saw on the 46" Samsung, we didn't have the strange effect with the animation. i researched our HDTV and noticed that it was "60hz" (i believe their 46" was 120hz). would this have anything to do with the strange, inexplainable effect i noticed on their HDTV and not ours? is this effect the result of a difference in either refresh rate or response time?

    You guessed correctly.

    Refresh rate is the number of times per second that the picture refreshes itself. The higher the number, the faster the refresh (240 is better than 120 is better than 60). You also might see mention of "frame interpolation" or "frame repetition." These are methods used to increase the speed of the refresh. A "repetition" method repeats the previous frame at a faster rate. An "interpolation" actually creates an intermediary frame between two normal frames to give the appearance of smoother motion. This is all done to combat picture blurring during scenes with a lot of fast motion.

    Response time is kind of the opposite, in that smaller is better (2 is better than 4 is better than 8). It shows the number of milliseconds (ms) between pixel refreshes. I think the average is 4ms. Some of the high-end sets are 2ms. However, be wary, because different manufacturers strangely use different seconds, and there's a lot of BS being bandied about in regards to response time.

cool. i heard from a store clerk that higher hz was better for gaming (especially with online competitive play) as players with higher hz sets were able to see what was going on more quickly than players with lower hz sets. when he told me this i immediately thought back the time i noticed the strange animation effect on the 46" Samsung, and that maybe that's what he was talking about. while i thought the effect was pretty cool (because it was new to me) it was still a bit jarring because i wasn't used to watching tv that way.

thanks for the info!

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