|In other words: If the tv only displayed at 33.75khz then any 480i signals would have to be de-interlaced to 480p and then scaled to 540p which would reduce picture quality.
The DRC chip is already well equipped to convert 720p to 1080i. I don't see what would be so difficult about converting 480i or 480p to 1080i. You keep introducing the terms de-interlacer and re-scaler as if they were pieces of hardware. Once you have your video signal in a digital form, you can paint the numbers into the volatile memory using any old algorithm and at any sync frequency and independentally grab chunks of data at a different rate and convert them back into analog.
The only way to know if the CRT is a dual scan type is to scope the horizontal final drive or put a AM transistor radio near the fly-back transformer and listen for a change in pitch when selecting 1080i vs. 480p.
If the CRT can scan at 31khz like 33.75Khz, wouldn't 480p look better if it also used the bypass circuit and avoided the extra circuits.
Perhaps it already is but we don't see the difference between a bypassed 480p signal and a non-bypassed signal because this 13 mhz signal is already too low rez. for the DRC/MID circuit to erode it further.
|Some of the (fixes) have to be hard fixes (someone please tell me if I am at least on the right track please) depending on when your set was
Yes, some sets manufactured in Mexico were assembled with B boards missing the bypass circuits, so a board swap is a prerequisite before any soft fix can be applied. Some B boards work correctly even without the use of the bypass circuit because their owners have not noticed the problem or they don't use 1080i or their boards are adequately shielded.
|Some of this stuff is just trying to achieve the best picture you can and that seems to have much to do with *Digital to *Analogue or *A to*D
conversions i.e keeping the signal Digital for as long as possible (how am
It's more like A to D followed by reformatting followed by D to A. That's a lot of processing. We are trying to keep the signal completely analog all the way through using the bypass. The only time when we're forced to deal with a digital signal is when it enters the TV via the DVI connector and immediately changes to analog.
According to ADU, the 2003 Sony fixed pixel products may be trying to keep the signal as completely digital for as long as possible. I have no idea what the XBR910 does with the digital signal arriving by the DVI port.
But you can see the copyright problems if a DVI decoder chip were to release decrypted video in a numeric format that someone could tap into.
To prevent this you would need some kind of super chip that does everything that is currently achieved with discrete chips within the XBR chassis. I believe Genesis already has such a beast.