naiaru wrote: On the 475 most of the NR options are disabled in 3D mode. I've heard the 575 can do both at the same time though.
I found this in the DPS-575 manual, but don't understand much of it as I'm still learning about such things. So what I gather is you cannot use both NR and 3d comb filter on chroma or luma at the same time. But you could use NR on chroma and 3d comb filter on luma and vice versa. If this is the case, which would be better to use NR on and which to use the 3d comb filter? Would there be any advantage to such settings, as opposed to NR on both vs 3d comb filter on both? Or am I just completely lost and incorrect about everything? 
Quote: The 3D Comb Decoder option selects between adaptive 2D and adaptive 3D combing, whether to comb luminance, chroma, or both. 3D combing combines information from previous frames in order to eliminate residual subcarrier artifacts such as cross luminance and cross chroma.
3D combing can be utilized even for non-composite input signals. For example, if the component input video source was decoded from composite by a less sophisticated decoder, the 3D comb filter in the DPS-575 can be used to clean up the signal and remove cross luminance and chroma artifacts.
When set to Disable, 3D combing is disabled, and adaptive 2D combing is used.
The Luma and Chroma settings enable 3D adaptive combing on luminance and chrominance respectively, while Both Y+C enables 3D adaptive combing on both.
Under normal circumstances, Both Y+C is the desirable 3D combing mode. It is not possible, however, to use both Temporal Noise Reduction and 3D combing on the same channel simultaneously. For example, if Temporal NR-Luma is enabled, 3D combing of luminance is not possible, so the 3D Comb Decoder must be disabled or set to Chroma. However, this is not a problem; with a sufficient Temporal Noise Reduction setting, there is no benefit to using the 3D comb filter simultaneously.
Setting this option to Luma or Both Y+C automatically disables Temporal NR-Luma (sets it to 3D Comb mode). Similarly, setting this option to Chroma or Both Y+C automatically disables Temporal NR-Chroma (sets it to 3D Comb mode).
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