Under the INPUT menu heading there's an item - RGB - which gives the horizontal and vertical frequencies of the input signal for both RGB and Component inputs. So for example, the input frequencies of a progressive PAL DVD signal will be shown as fH=31.5kHz and fV=50Hz (approx.) which is what you'd expect.
With an DTV signal from the 1080i output of the one and only high definition set top box available in Australia (DGTEC DH2000A), the input frequencies, as shown on the Hitachi, are 28.2kHz and 25.1Hz. This applies whether the program is HD or SD but these frequencies are 'out of sync' with component.
We have one HD demonstration loop that broadcasts every day for several hours, but HD programs are few and far between. The HD loop is an anamorphic 1440x1080i at 50Hz.
With an RGBHV connection between the STB and the projector, the HD image is more detailed than any DVD I've seen but the colour is not as good - perhaps a limitation of the RGB input. Furthermore, the HD image - in RGB mode - shows lots of motion artifacts in the form of visible horizontal lines on the parts of the image that are in motion and jagged edges most noticeable on diagonals. I would describe this is more noticeable than any screen door effect on other projectors and a mar on the usually film-like, smooth effect of the LCOS system.
Switching the output of the STB to 1152i/576P allows the Hitachi to display HD through the component jacks. The input frequencies are then shown as similar to progressive DVD (give or take a few decimal points), and the picture quality looks pretty similar to DVD.
Would someone (anyone?) care to speculate what's going on here. How does the SX5500W handle a 1080i signal? What does it do with it? What input signal readouts do you guys get in America when the Hitachi is fed a 1080i signal from an STB?
Any feed back would be much appreciated. I'm also trying to justify the purchase of a Panamorph but so far I just can't see the benefits with this projector.
With an DTV signal from the 1080i output of the one and only high definition set top box available in Australia (DGTEC DH2000A), the input frequencies, as shown on the Hitachi, are 28.2kHz and 25.1Hz. This applies whether the program is HD or SD but these frequencies are 'out of sync' with component.
We have one HD demonstration loop that broadcasts every day for several hours, but HD programs are few and far between. The HD loop is an anamorphic 1440x1080i at 50Hz.
With an RGBHV connection between the STB and the projector, the HD image is more detailed than any DVD I've seen but the colour is not as good - perhaps a limitation of the RGB input. Furthermore, the HD image - in RGB mode - shows lots of motion artifacts in the form of visible horizontal lines on the parts of the image that are in motion and jagged edges most noticeable on diagonals. I would describe this is more noticeable than any screen door effect on other projectors and a mar on the usually film-like, smooth effect of the LCOS system.
Switching the output of the STB to 1152i/576P allows the Hitachi to display HD through the component jacks. The input frequencies are then shown as similar to progressive DVD (give or take a few decimal points), and the picture quality looks pretty similar to DVD.
Would someone (anyone?) care to speculate what's going on here. How does the SX5500W handle a 1080i signal? What does it do with it? What input signal readouts do you guys get in America when the Hitachi is fed a 1080i signal from an STB?
Any feed back would be much appreciated. I'm also trying to justify the purchase of a Panamorph but so far I just can't see the benefits with this projector.