Sony DVP-NS999ES - Manual (Page 17)

ES Series DVD-Video/CD/SA-CD Players; Version 3.0 Page 17
settings to memory. The DVP-NS999ES has memory for 300 discs. As a 400-
disc changer, the DVP-CX777ES has memory for all 400 discs. And the DVP-
NS555ES has memory for 30 discs.
Separate analog video circuit board with
separate power supply (DVP-NS999ES)
The digital and control circuits of any DVD player generate high-frequency
radiation that can affect other circuits in the chassis. This noise can potentially
impair low level analog signals. To prevent any cross-interference, Sony
carefully separates the digital circuits from the analog circuits, mounting them on
separate circuit boards. This maintains the purity of the analog signal for
consistently clean video images.
To maintain the purity of the signal, Sony places the analog video
circuitry on a separate board, driven by its own power supply.
Because digital noise can corrupt the DC voltage, the power supply is
another potential path of interference. That's why Sony was the first brand of
DVD players to give the analog circuit block its own series power supply. This
ensures power that's both abundant and clean.
Sony also uses video filters designed specifically for both interlaced and
progressive signals in all three channels (Y, P
B
and P
R
). All told, there are nine
channels of video filtering: interlaced component Y/P
B
/P
R
, progressive
component Y/P
B
/P
R
and Y/P
B
/P
R
channels filtered prior to composite or S-Video
encoding. Sony engineered each filter to match the specific operation bandwidth
and sampling frequencies of the signal. This achieves phase linearity while it
holds noise and distortion to a minimum.