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Guest Message by DevFuse

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Determining level of compression


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4 replies to this topic

#1 OFFLINE   flexed2death

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Posted 08 July 2007 - 08:03 PM

Is there a way to determine how compressed a particular channel is? The reason I ask is I had my HR20 record the Wimbledon Mens finals starting at 6am PDT (in HD on NBC). I originally started watching it on my Samsung plasma TV and noticed a judder in the picture from time to time. This was a concern to me as the samsung TV I have has had reported issues with judder when horizontal tickers are present (another story not appropriate for this forum). After freaking out I decided to switch to my front projector as the display and noticed that it too had the judder I was seeing on the samsung plasma. I'm assuming that since I can see the judder on two different displays that the cause of the problem is the HR20 and am wondering if it was caused by the signal being compressed more than normal. Anyone have any opinions on my theory?

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#2 OFFLINE   Slyster

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Posted 08 July 2007 - 10:52 PM

Some SD channels look VERY good.. but others.. like LINK look so horrid! I would really like to hear this answer too. They should REALLY just make all the SD channels the same... lower the really good quality channels and raise the poorest channels. Be fair!
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#3 OFFLINE   MRinDenver

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Posted 09 July 2007 - 10:47 AM

Is there a way to determine how compressed a particular channel is? The reason I ask is I had my HR20 record the Wimbledon Mens finals starting at 6am PDT (in HD on NBC). I originally started watching it on my Samsung plasma TV and noticed a judder in the picture from time to time. This was a concern to me as the samsung TV I have has had reported issues with judder when horizontal tickers are present (another story not appropriate for this forum). After freaking out I decided to switch to my front projector as the display and noticed that it too had the judder I was seeing on the samsung plasma. I'm assuming that since I can see the judder on two different displays that the cause of the problem is the HR20 and am wondering if it was caused by the signal being compressed more than normal. Anyone have any opinions on my theory?


Actually, the source for Wimbeldon feeds was not HD; NBC did the best they could with an upconvert, which may have een the source of your problems.
“The easy confidence with which I know another man’s religion is folly teaches me to suspect that my own is also.” -- Mark Twain

#4 OFFLINE   finaldiet

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Posted 09 July 2007 - 10:55 AM

Some SD channels look VERY good.. but others.. like LINK look so horrid! I would really like to hear this answer too. They should REALLY just make all the SD channels the same... lower the really good quality channels and raise the poorest channels. Be fair!


Not if I get to Grand Rapids!! Concerning the BASS!

#5 OFFLINE   tonyd79

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Posted 09 July 2007 - 11:41 AM

Some SD channels look VERY good.. but others.. like LINK look so horrid! I would really like to hear this answer too. They should REALLY just make all the SD channels the same... lower the really good quality channels and raise the poorest channels. Be fair!


You are assuming that the PQ is solely the responsiblity of DirecTV. Some stations are just horrible to begin with and cannot be made better.
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