Comcast Cable/Panasonic HD


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Comcast Cable/Panasonic HD

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mlv
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mlv5@comcast.net

Nov 15, 2004, 2:57 PM

Post #1 of 5 (7997 views)
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Comcast Cable/Panasonic HD	Can't Post

After Thankgiving my family is going to be purchasing a plasma TV, and we were thinking about the TH-42PX25U/P by Panasonic. I've heard that this has good reviews. The specifications for the the plasma say that it can only receive 720p HD broadcasts (Like FOX) through "PC Input". My question is, will the TV be able to receive 720p broadcasts through the HD cable box? Or, is this just what it can receive with the ATSC/QAM over-the-air antenna?

The plasma specifications can be found here: http://www.plasmatvbuyingguide.com/plasmatv/panasonic-th42px25up.html

BruZZi
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Nov 15, 2004, 10:52 PM

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Re: [mlv] Comcast Cable/Panasonic HD [In reply to]	Can't Post

You'll need to set the HD Cable Box to output 1080i (Some Cable Boxes don't have a 720p option and will do the Upconvertion automatically) when using the Component and HDMI inputs.

So the display will then be able to accept those upconverted signals.

If you try to feed a 720p signal to the Component and HDMI inputs, no picture will be displayed.

.

(This post was edited by BruZZi on Nov 15, 2004, 10:54 PM)

Guest
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Nov 22, 2004, 11:26 PM

Post #3 of 5 (7897 views)
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Re: [BruZZi] Comcast Cable/Panasonic HD [In reply to]	Can't Post

That is not totally right. You can feed a 720p feed to both the hdmi and component video inputs. the tv will then do its conversion to its native resolution which happens to be 720p

BruZZi
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Nov 26, 2004, 2:12 AM

Post #4 of 5 (7847 views)
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Re: [Guest] Comcast Cable/Panasonic HD [In reply to]	Can't Post

There's always confusion about this topic.

The TH-42PX25UP is 1028x768. It's native resolution is 768 and not 720. Smile

And yes, all the signals will be up/down converted to the display's native resolution (Again 768).

HOWEVER, All The Panasonic Consumer Plasmas DO NOT ACCEPT 720p signals at the Component, HDMI or DVI inputs. Only the Front PC input and the Internal Tuner (Using the coax inputs) will accept 720p.

To watch 720p sources using the component, HDMI and DVI (PA20/PA25), you must set the HD Receiver/Cable box to output 1080i so the display will be able to downconvert those signals to 768.

If 720p is set, no/distorted picture will be displayed.

It sounds weird especially for the 37" HD display being 1024 x 720 but this is a way (by Panasonic) to save money using a less capable scaler on the Consumer Models (All the Industrial Models accept 720p sources).

physica
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Dec 17, 2004, 1:10 PM

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Re: [BruZZi] Comcast Cable/Panasonic HD [In reply to]	Can't Post

Hey Guys,

I'm also getting either the TH-42PX25UP or TH-42XVS30 (same except all electronics come in a seperate enclosure). I also share the concern of being able to receive 720p signal sources BUT ACCESSED THROUGH THE INTERNAL CableCARD.

BruZZi, you mentioned

Quote

Only the Front PC input and the Internal Tuner (Using the coax inputs) will accept 720p. To watch 720p sources using the component, HDMI and DVI (PA20/PA25), you must set the HD Receiver/Cable box to output 1080i so the display will be able to downconvert those signals to 768.

Quote

I just wanted to be sure in asking:

1) If the CardCARD in tandem with the internal coaxial input replaces a HD Receiver/Cable box for the above units, will the CableCARD technology allow for a 1080i input setting so as to also downconvert those signals to 768?

The major networks are free to choose either 720p or 1080i for their HD broadcasts, and so the networks use both (see website http://www.timefordvd.com/...italTVTutorial.shtml). It seems apparent if some networks broadcast HD at 720p, my tuner will still down convert to 480, since my native 786 would not be able to naturally up convert, as mentioned in this thread.

2) However, some good websites sources(http://hometheater.about.com/...n/a/aafoxhdtv03a.htm) and http://www.crutchfieldadvisor.com/...er/home/tv_hdtv.html) state some HDTV's will upconvert to a HDTV's native display rate, while some forums, including this one (http://www.satelliteguys.us/...ndex.php/t-3069.html) say the HDTV does not upconvert the signal, the up conversion takes place before the HDTV.

In your highly praised knowledge & experiences, will a 720p HD broadcast be able to be viewed in the above panasonic's native 786 display (either by the HDTV, CableCARD, HD Receiver/Cable box, or before these stages at the cable provider source)?

Many thanks.

GLA

(This post was edited by physica on Dec 17, 2004, 1:52 PM)

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