Originally Posted by asagarra
Sorry for this dummy question but.. :
576i is standard DVD format for PAL discs, right? If the player only reads the sample from the disc and outputs it through a digital HDMI output, no option for loss seems to be possible, IS THAT CORRECT?
So, in case using an external scaler and a hq amp for sound, is there any reason for spending more than 100 in a player?? I guess there is, I must be missing quite a few points.
Would any dummies evangelist pls throw a bit of light to my brain darkness..??
This is a very useful sticky thread.
There are several processes that a DVD player typically performs, not necessarily in this order:
0. Video is recorded as interlaced YCbCr 4:2:0 (compressed Horiz & Vert chroma)
1. The MPEG decoder de-multiplexes the stored data stream into the separate audio and video channels.
2. The MPEG decoder also up-converts to YCbCr 4:2:2 (compressed H only)
3. The player performs up-conversion to YCbCr 4:4:4 (no chroma compression).
4. Interlaced component may be de-interlaced to progressive.
5. Video processing may be applied - filtering, colour, contrast, sharpening etc.
6. Component is D to A converted, buffered and filtered for analogue output.
7. Progressive component may be up-scaled to 720p etc.
8. Component is transcoded from YCbCr 4:4:4 to RGB 4:4:4.
9. Upscaled progressive RGB is output by HDMI.
A "pure" HDMI digital video output may come in lots of different flavours:
1. Upscaled RGB ("worst")
2. Progressive RGB
3. Interlaced RGB
4. Interlaced YCbCr 4:4:4
5. Interlaced YCbCr 4:2:2 ("best" - same as SDI)
So it's not quite so simple to say that interlaced video is what you want, but that is the most important process that you want the scaler to perform instead of the player. However, the closer you can get to raw data off the disc the better. SDI is the best interface, but even that has been through one up-conversion process (which is prone to chroma bugs!). That's why you always want a player with a good MPEG decoder.