Hello everyone,

I have searched the forums and looked at some threads but none refer to this subject, so here's my case and questions.

I'm planning to purchase a new 46" LCD TV, so yesterday I went to Circuit City, I was looking at the TV's and I saw a couple of LCD TVs that advertised 120hz and they were definitely NOT running at 120hz, I have a trained eye (I've dealt with computer screens for 10 years now) and I could tell a real 120hz TV from a non 120hz one.

So I told the sales dude that 'this TV' is NOT running at 120hz, that I could tell right then and there, that if that TV is not running at 120hz why are they advertising it like that?

His response was that maybe that TV was not hooked to a 120hz source, like a Blu Ray or DVD unit.

He also said that the TV will run at 120hz if the source was at 120hz. He said that regular TV cable runs at 40hz, and that High Def Cable runs at 70hz.

I don't really believe this guy 100%, something tells me that he's BSing me, because if this is the case, then 120hz will mean nothing in the market because the source signals are not 120hz.

So, my questions are:


Is what this guy is saying true?
Is the source's hz relevant to a TV's 120hz?
Does Cable and HiDef Cable really run at 40hz and 70hz?


Thanks a lot guys!

All current 120hz sets do the work in the set as there is no 120hz sources available.
BTW: The set was running 120hz since this is an automatic feature, is the gain real?
"+/-".
Pretty much all new LCD displays will do this as the buying public expects it and mfgrs. want to run as few build lines as possible.

Hello everyone,

I have searched the forums and looked at some threads but none refer to this subject, so here's my case and questions.

I'm planning to purchase a new 46" LCD TV, so yesterday I went to Circuit City, I was looking at the TV's and I saw a couple of LCD TVs that advertised 120hz and they were definitely NOT running at 120hz, I have a trained eye (I've dealt with computer screens for 10 years now) and I could tell a real 120hz TV from a non 120hz one.

So I told the sales dude that 'this TV' is NOT running at 120hz, that I could tell right then and there, that if that TV is not running at 120hz why are they advertising it like that?

His response was that maybe that TV was not hooked to a 120hz source, like a Blu Ray or DVD unit.

He also said that the TV will run at 120hz if the source was at 120hz. He said that regular TV cable runs at 40hz, and that High Def Cable runs at 70hz.

I don't really believe this guy 100%, something tells me that he's BSing me, because if this is the case, then 120hz will mean nothing in the market because the source signals are not 120hz.

So, my questions are:


Is what this guy is saying true?
Is the source's hz relevant to a TV's 120hz?
Does Cable and HiDef Cable really run at 40hz and 70hz?


Thanks a lot guys!

He's full of ****. TV is 60hz. The 120hz processing that goes on inside the TV is basically just interpolating black frames between the actual frames, giving the appearance of a "smoother" image. That guy was full of ****.

Aside from a computer, there are no 120hz sources. Not even blu-ray.

Thanks for the replies guys.

So the guy was actually full of it, I knew there had to be something going on in his explanations.

So in conclusion, the source has nothing to do with a TV working at 120hz, correct?

One last question though: Does Cable and HiDef Cable really run at 40hz and 70hz?

Thanks again.

So in conclusion, the source has nothing to do with a TV working at 120hz, correct?
- The TV will convert 24/30/60Hz to 120Hz.

One last question though: Does Cable and HiDef Cable really run at 40hz and 70hz
- Depends on the channel. 720p is 60fps and 1080i is 30fps.

One last question though: Does Cable and HiDef Cable really run at 40hz and 70hz?

No, video is (usually)60hz, at 30fps.

Film content from DVD or BRD is 24fps, output in a variety of ways. The same actually goes for film content that is broadcast at 60hz, it is still 24fps, but is 3:2 to 60hz, your video processor or TV, depending on how good it is, will hopefully do 3:2 pulldown/deinterlacing to get back to 24fps display. Or if you're looking to get the 120hz interpolation going on, will add new frames which makes film look way more like video which you may or may not like.

Is the source's hz relevant to a TV's 120hz?

Not really no. It may be relevant if you're a gamer and the display actually accepts very high refresh rate, and you want to feed rendered graphics at that high a refresh, in which case it can be relevant. However, for home video content, it is not relevant because at this point this 120hz processing is being done in the TV, which you can turn on or off as you see fit. Most of the people in chain stores don't know what they're talking about.

Awesome guys.

Now I have a very, VERY clear idea of some of the concepts behind this 120hz subject, I will be totally confident now going back to Circuit City and face those sales dudes.

Thanks everyone for your replies and help.

Bytes,

Condorito.

And don't let them sell you "120hz HDMI cables", since for the above reasons they are irrelevant since you're not sending those signals at all.

Aside from a computer, there are no 120hz sources. Not even blu-ray.

Aren't some blu-rays in 120hz? I was told Transformers was, though I have no idea.

Aren't some blu-rays in 120hz? I was told Transformers was, though I have no idea.

no.

Aren't some blu-rays in 120hz? I was told Transformers was, though I have no idea.

No. And whoever told you that is 1)wrong, or 2) lying.