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Anyone compared HDMI to component on PW7?

Discussion in 'Plasma TVs' started by mozart, Feb 15, 2005.

  1. mozart

    mozart
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    I've read about the potential problem with HD PAL on TH42PW7 HDMI-board, but has anyone compared quality of HDMI vs. component connections on standard definition signals from dvd on this display?
     
  2. t0by

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    Yes, I had a demo at AV Sales last week and watched both HDMI and component through a Panny S97. HDMI was into a DVI board on the PW7.

    To be honest, I was singularly unimpressed with the HDMI signal and much preferred the component PQ. IMHO the component image was superior, although I cannot vouch for how much of that opinion is formed by the S97. It was pretty rank and we experienced some awful solarisation on some LOTR demo scenes.
     
  3. mozart

    mozart
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    Thanks, tobyhenderson. That's weird. Is the s97 known to have a bad HDMI output? I just can't get my head around this. The extra DA and AD conversion should be degrading the picture, and the difference should be similar to that of HDMI into a digital projector. Also, in a test of the Pioneer screen (What HiFi), the enhancement was obvious. Maybe the Panasonic plasma is guilty? I just got myself an Arcam DV29, mainly for its HDMI output... Anyone?
     
  4. t0by

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    I'm no expert, mozart, but what we did notice was that when we switched back to component on the S97, the solarisation improved (but was still visible), and when we switched back to component on a Denon 2900, it all but disappeared.

    The Panasonic plasma was certainly not at fault. It was stunning via component on the 2900 (unless it was the DVI board, but we didn't try any other digital connections).

    Toby
     
  5. Member 55145

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    what AD DA conversion? DVI digital and component are both digital signals, so both should be the same PQ, only difference is DVI can have more bandwidth ... i think

    Either way both component and dvi standards are digital and can carry 480P 720P and 1080i
     
  6. Alec

    Alec
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    Interesting review of the S97 in What HiFi March 05. They didn't like the HDMI output.
     
  7. mozart

    mozart
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    Hi, JagoPlasma. HDMI and DVI are digital, component analogue. Needs to be converted in dvd player (Digital to Analogue), then converted back to digital in the plasma display (Analogue to Digital, as plasma is a digital technology).
     
  8. Member 55145

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    no component is a digital signal, and thus better than rgb scart. in fact the only difference is DVI is sent via RGB digital and component sent by CyBbRb(<--- this bit i always forget the letters) digital, with the later being what format DVDs are stored in and the former what the display device uses
     
  9. mozart

    mozart
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    Maybe thats it, Alec. Anyone tried a different dvd player HDMI into PW7?
     
  10. mozart

    mozart
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    Sorry, JagoPlasma. I really don't want to argue with you, but you're wrong.
     
  11. smultron

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    No, component is an analog signal.
     
  12. bowlhead2000

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    Another vote for component being analogue...
     
  13. mozart

    mozart
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    For JagoPlasma, concerning component signal.
    From the HiFiChoice review of DV29: "Analogue picture quality through the component video output, which often comes a poor second to digital video, is all but indistinguishable to the digital picture."
     
  14. Member 55145

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    ok fair do, i put my hands up n admit im wrong, thought it was digital, damn site better than analogue RGB anyway
     
  15. mozart

    mozart
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    Well done JagoPlasma! Friends?
     
  16. smultron

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    Live and learn;-)

    Quality wise there should be no difference between YUV and RGB.
     
  17. Member 55145

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    he i wouldnt make an enemy of someone who was correct ;)
     
  18. Member 55145

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    Funny that i always thought that RGB scart was the D'sB's till a couple of years ago when i connected my dvd player to my mates LCD projector, using rgb to VGA it was great, but using component was superb! every pixel was clearly defined unlike the RGB which was not(And no the dvd player cant output progressive)
     
  19. mozart

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    Component is supposed to be a better connection than scart RGB, but I have no idea why. Both are sending three separate signals. Three runs of isolated cable should be a better bet noisewise than multipin scart, though.
     
  20. smultron

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    Could be a sign of a bad implementet RGB In or Out.
    I have seen better pictures on a TV through S-Video, than through RGB.
     
  21. Member 55145

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    I think it has to do with the fact RGB scart is analogue all the way, whereas component is based on digital information, i.e it is recompiled at the end so the signal that is recieved is "added up" to give an exact representation of what was sent, whereas RGB scart is just sent straight thru directly to the guns in CRT sets and to hell with error correction

    feel free to correct me if im wrong.... again ;)
     
  22. Bearded_Malc

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    RGB is red, green, an blue signals, if you have gain errors or offsets these produce r,g or b tints. Component sends B&W and colour difference signals. Errors on these are less noticeable. This is also how DVDs are coded to the conversion to component is direct.
     
  23. Audionyx

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    A component connection or YUV (Luminence and colour difference) is what the DVD encoded video format is. The reason for this is that to encode in RGB would exceed the storage capacity of standard DVD.

    Also, bear in mind that the SCART connector is hardly a purist connection with 21 tiny pins as the conductors, not to mention the interference issues as a result. RGB SCART is also an interlaced image.

    Now comparing a progressive RGB output from say a PC/Mac one does get an exceptionally clear image which indeed is the rival of component. It all boils down to the implementation and in this case component will be slightly better.

    EDIT - Still waiting to obtain the HDMI board to test this method. Currently using the new Marantz DV9500 which BTW is superb!
     
  24. mozart

    mozart
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    Ok, so the disc is encoded in YUV and the screen is RGB-based (CRT as well as flat displays)? There is also the ability to send progressive signal through component, by the way. Anyway, anyone seen PW7 in action HDMI connected to (a good) HDMI player?
     
  25. mozart

    mozart
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    There's a choice of sending digital video as RGB or YUV on Arcam DV29. I guess this would affect HDMI quality, as well?
     

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