ES DVD Players 2005, Version 4.0 Page 21
Luminance Channel (Y)
Bandwidth
Luminance Channel (Y)
Sampling Frequency
DVD-Video Interlaced
Playback
6.75 MHz 13.5 MHz
DVD-Video Progressive
Playback
13.5 MHz, effective 27 MHz, effective
Progressive scanning effectively doubles both the video bandwidth and
the sampling frequency. While only the luminance (Y) channel is shown
here, this doubling also occurs for the two color difference channels (PB
and PR).
27
MHｚ-Sampling
5427 108 216
Video
Signal
Analog-Filter
Noise Noise Noise Noise Noise NoiseNoise Noise
Loss
Including
N
oise
5427 108 216
Video
Signal
Noise Noise Noise Noise
54
MHｚ-Sampling
5427 108 216
Video
Signal
Noise Noise
108
MHｚ-Sampling
5427 108 216
Video
Signal
Noise
216
MHｚ-Sampling
At 27 MHz sampling (top), the design of the filter (red curve) is
extremely challenging for progressive scanning. The filter either cuts
into the video detail (blue) or passes some of the noise (pink).
Oversampling at the 216 MHz frequency of the Sony® ES Series DVD
players makes a huge difference.
Oversampling has been used successfully in CD players for decades.
And while the video equivalent is harder to achieve, the effect is the same. The
D/A converter of the DVP-NS9100ES and NS3100ES shift the sampling
frequency from the standard 13.5 MHz to 216 MHz. For progressive scan
playback, that's 8x oversampling. For interlaced playback, it's a whopping 16x
oversampling. This oversampling is the most powerful that Sony has ever built
into a DVD player. You get superb clarity with the effective suppression of video
noise, while enjoying the full video bandwidth for breathtaking picture detail.