Originally Posted by MRzx
Ahhh, ok, so it only does that to component in and such, it leaves the HDMI input alone. From what I understood from other sites, It made it sound as if it would down convert the HDMI from lets say 1080i to 720p. Thanks alot guys, Looks like I'm getting the Onkyo.
I have also been curious about how the Onkyo 605 handles video upscaling and processing. The Onkyo seems to use the Faroudja FLI8125 (Hudson) chip for deinterlacing and scaling. This chip uses an 8bit analog to digital processor and a 2D comb filter. It also carries the DCDi technology used in the Oppo 981 but the oppo uses a 3D comb filter and is optimised to produce HDMI (digital) output so the A/D processing is less relevant.
The use of the Hudson chip together with a 2D comb filter means that video processing will be performed on the chrominance and luminance components of the video signal. This is less capable than 3D comb filters which split the chrominance signal for 3 channels of higher accuracy processing.
The higher end chips found in the Onkyp 875 and other brands are able to partially recreate the split chrominance and luminance signals from input as lowly as composite video. The use of S-video inputs and monitor outputs would represent the optimum video processing configuration for the faroudja 'hudson' chip on the Onkyo 605. The receiver passes inputs and outputs of similar signals untouched (HDMI in -> HDMI out) hence the use of component in/outs should pass the split chrominance and luminance signals without being processed. I bought a 'VGA to component' cable from monoprice and I intend to test when this will carry VGA signals from my laptop without being altered by the 2D comb filter provided the component output video monitor is used.
I am slightly disappointed by the capabilities of the hudson chip but I concede that its untypical to expect more at this price point. The HDMI 'pass through' feature hence provides some escape in these scenarios. My cable box outputs either coaxial or composite video so the 2D comb filter might not be so bad for me, but persons who run Hi Def video sources (inputs) through component and output through HDMI may be affected more by the 2D comb filter, and not as much by a possible down conversion from 1080i to 720p. I use a harmony 670 remote control so I can easily manage having both an HDMI and component connections going to the TV from the reciever. However I may have to buy a HDTV with more powerful 3D combs/10 bit+ processing to handle scaling and upconversion when my cable company switches to high definition transmision.
It isn't that bad :-) Atleast the Onkyo 605 can decode DTS-Master audio and perform DCDi on lesser sources of SD video, for about 450 dolls. Try looking for those specs in similarly priced recievers.