Home > Podcast > AVRant #107: Bickering

AVRant #107: Bickering

December 18th, 2008

Tom re-wired his system… again. Cables Tom and Clint never have. Listen in to see if you’re the winner of our contest. A question about whole house audio gets Tom worked up about Crestron and the like. Jonathan wants to know more about why you calibrate your display/source. Are there a lot of Blu-ray players in Japan? Apparently not. Scot has a few questions about Blu-ray, HDMI, using two receivers in concert, and video processing. I new super secret segment for AV Rant. You’re gonna want to tune in for this. Cliff wants to know about video scaling and 240Hz processing. Congrats to our winner – pick your prize and let me know. Look for a post very soon with the winner and our two runners up. Thanks for listening and don’t forget to vote for us at Podcast Alley.

A slightly different version from the original. Remind me to send Jeremy my Xbox Live Avatar

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  1. miked
    December 18th, 2008 at 19:11 | #1

    I think there is some confusion about 120hz.

    120hz display means that you can display 24fps content without having to do a weird frame cadence.

    It also just so happens that the display is a bit faster (I think they refer to it as overdriven) to get this fast. This helps with reduce motion blur that is inherent in the fact that LCD’s don’t switch fast enough which causes the video to look more blurry.

    There is also another technology which is frame rate conversion. This is being placed on newer sets and also reduces motion blur by adding additional frames in between the frames that actually exists. So instead of the TV showing:
    Frames 0,0,0,0,1,1,1,1,2,

    It now shows:
    0,0.25,0.5,0.75,1,1.25,1.5,1.75,2

    So the jumps aren’t as large for the on screen video and there isn’t as much blur. Now you can actually do this with 60hz TV also but it requires quite a bit of processing power and is simplified if your frame rate falls on an even multiple of the TV refresh. Plus you can charge more for the 120hz TV so you can include the better processors there without breaking the bank.

    At least this is how I understand it, the manufactures like to lump it all together sometimes but there are actually distinct technologies at work here.

  2. December 19th, 2008 at 11:11 | #2

    “120Hz display means that you can display 24fps content without having to do a weird frame cadence.”

    In theory you are correct. That’s what it’s SUPPOSED to be. Manufacturers are instead offering solutions that do more regarding frame interpolation than anything else. We haven’t yet seen anything that truly implemented 120Hz for the sole purpose of eliminating judder without resulting artifacts.

  3. Raul in HD
    March 5th, 2009 at 18:16 | #3

    “Marathon Runner, but clumsy” Good comparison!

    So I was in Fry’s Electronics not to long ago and notice the Samsung Tom reviewed. It looked like crap with its Dynamic setting, and the 120Hz set to high. Getting curios I wanted to mess with it. In Movie mode and with the 120Hz off, it looked really GOOD!! Man it looked good. With Dynamic and 120Hz on high, I couldn’t see artifacts, but that was cuz of the florescent lighting. Did notice the hiccup here and there very annoying. But what was really bad was the Video look it had with those settings. It looked like some PBS special, the Special effects of the movie looked really fake! But returning to Movie mode, and 120Hz off that Samsung looked really good!!! Of course Consumer-Joe has no idea what good image looks like.

  4. Raul in HD
    March 5th, 2009 at 18:17 | #4

    lol still laughing “clumsy Marathon Runner” Good one Clint

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