At 5:19 PM -0400 7/11/08, Manfredi, Albert E wrote:
This is your standard reply when you are unable to follow a thread. A common problem among those who prefer to transmit than to receive, which was oh so painfully obvious in this thread too. If you go back to the references Cliff posted on 7 July, you will see what his point is. The references state that the color resolution of NTSC composite interfaces is limited to about 120 lines in practice, and 140 theoretical. HOWEVER, the color broadcast in OTA NTSC transmissions is much less than that. Here's the quote: "NTSC Broadcasts (composite) - 120 lines best, 40 - 48 lines typical for reddish orange and greenish blue; 40 - 48 lines for most other color transitions" So, what was this all about? It was about explaining that if you use a CECB to decode a TV signal, as opposed to watching the NTSC broadcast, over the composite interface, you should notice much better color resolution than from the NTSC broadcast. Because the CECB creates the composite signal from the 4:2:0 digital, and is not limited to the ~40 lines in practical NTSC broadcasting. It is ONLY limited to the 120 lines of NTSC at its practical best. Capisc?
I already understood what we were talking about . Clearly you still do not understand what you are talking about.
You are correct that a CECB "could" produce far better quality color than an NTSC broadcast as the component source has much more color information available prior to MPEG-2 encoding. In reality there may or may not be as much accurate color information available after decoding.
But that information will then be band pass limited when it is NTSC ENCODED for the composite video output. The net result may be better, or it may be worse than an NSTC broadcast depending on the quality of the MPEG-2 compression.
That being said, this has NOTHING to do with Cliff's claim that Betacam offered a baseband composite video output with more color information than any other NTSC encoded source.
The issue is the NTSC encode bandpass... By the way I do not Capisc... But I do capiche. Regards Craig ---------------------------------------------------------------------- You can UNSUBSCRIBE from the OpenDTV list in two ways:- Using the UNSUBSCRIBE command in your user configuration settings at FreeLists.org
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