Hello all

Ok , I know that HDMI will output both audio and video using one connection completely in the digital domain and that component is separated and uses analogue transfers.

My questions are , when connecting via , say Moome's card, would this eliminate the need for an expensive scaler (already in inventory)? Would the transfer be 1080i/1080p direct (BR or HD) to the pj, natively? I assume internal processing DACs on Momes card. Obviously additional cables are required. I prefer wireless feed (is there such availability)? If satellite can transmit 1080i (or whatever means) , why not source to pj....where are the engineers here on the forum???? Start a think tank guys.....

What are we missing using component 1080i via a scaler to the pj?

Can someone please elaborate?

Thanks to all.

Your PJ needs RGBHV--it cannot display anything else. Pretty much every source we use is digital 8 bit YCrCb. That means the digital YCrCb must be transcoded to analog RGBHV. The biggest factor in this is the quality of the DAC doing the work.

If you use component, that means the YCrCb is turned into analog YPrPb by the DAC in the source. This analog YPrPb signal must then be transcoded to RGBHV by a transcoder in or out of the PJ or a DAC in a scaler (after turning it back into digital).

If you use HDMI, the signal must be transcoded from digital YCrCb to digital RGB then to analog RGBHV (it is possible to also do YCrCb -> YPrPb-> RGB but not for a DVI input and I don't think any of the HDMI inputs work that way either).

The only disadvantage of feeding analog to a scaler is that it must perform an A/D conversion so that it can work with it (you can't scale or deinterlace an analog signal). It is almost impossible to perform a 100% perfect A/D conversion so there is slight resolution loss when doing this.

Dave

Your PJ needs RGBHV--it cannot display anything else. Pretty much every source we use is digital 8 bit YCrCb. That means the digital YCrCb must be transcoded to analog RGBHV. The biggest factor in this is the quality of the DAC doing the work.

If you use component, that means the YCrCb is turned into analog YPrPb by the DAC in the source. This analog YPrPb signal must then be transcoded to RGBHV by a transcoder in or out of the PJ or a DAC in a scaler (after turning it back into digital).

If you use HDMI, the signal must be transcoded from digital YCrCb to digital RGB then to YPrPb (it is possible to also do YCrCb -> YPrPb-> RGB but not for a DVI input and I don't think any of the HDMI inputs work that way either).

The only disadvantage of feeding analog to a scaler is that it must perform an A/D conversion so that it can work with it (you can't scale or deinterlace an analog signal). It is almost impossible to perform a 100% perfect A/D conversion so there is slight resolution loss when doing this.

Dave

Thanks for the reply Dave... sorry for the late reply. Had to take the wifey out for dinner for her birthday.

Much appreciated .