Quote:
Originally Posted by jsmar 
My local NBC station (KUSA in Denver) started transmitting AFD yesterday. I monitored the AFD codes during Conan, and NBC is sending the wrong code (they're sending 9, indicating the picture is pillar boxed 4:3, rather than 15 which indicates that the signal is 16:9 full frame but is 4:3 "safe"). So, although I believe the DTVpal is still wrong to ever disable the ability to change the zoom, NBC is also at fault for sending the wrong code.
I did notice another bug in the DTVpal. AFD codes are sent multiple times per second, so when the codes are not sent a receiver should quickly timeout and revert to whatever default behaviour it has when AFD is not present. The DTVpal does not do that. I goes by whatever the last code received was. I was able to see this behaviour on a DTVpal during the commercials. The network commercials all had AFD, but the local commercials did not. If the last network commercial was sent with code 9 then all of the local commercials were locked in 4:3 cropped format, regardless of what format the commercial was in.

My local NBC station (KUSA in Denver) started transmitting AFD yesterday. I monitored the AFD codes during Conan, and NBC is sending the wrong code (they're sending 9, indicating the picture is pillar boxed 4:3, rather than 15 which indicates that the signal is 16:9 full frame but is 4:3 "safe"). So, although I believe the DTVpal is still wrong to ever disable the ability to change the zoom, NBC is also at fault for sending the wrong code.
I did notice another bug in the DTVpal. AFD codes are sent multiple times per second, so when the codes are not sent a receiver should quickly timeout and revert to whatever default behaviour it has when AFD is not present. The DTVpal does not do that. I goes by whatever the last code received was. I was able to see this behaviour on a DTVpal during the commercials. The network commercials all had AFD, but the local commercials did not. If the last network commercial was sent with code 9 then all of the local commercials were locked in 4:3 cropped format, regardless of what format the commercial was in.
The DTVPal seems to get some type of indication from 480i broadcasts to automatically zoom/crop the picture.
The user has no control of the picture format on 480i broadcasts. Except the display shows "full" picture mode on 480i, not zoom.
Full picture mode on the DTVPal is actually horizontal squeeze on any 720p or 1080i broadcast.
Full picture mode is also the mode it is locked to by the NBC AFD code, even though it is actually zoomed/cropped.
During commercials, the aspect ratios are all over the place, from letterbox pillared to horizontally squeezed.
















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Doesn't size matter?
