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DVD-Video Interlaced
Playback
DVD-Video Progressive
Playback
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 (P
and P
).
R
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.
ES DVD Players 2005, Version 4.0
Luminance Channel (Y)
Bandwidth
6.75 MHz
13.5 MHz, effective
27
MHｚ-Sampling
Loss
Analog-Filter
Video
Noise
Noise
Noise
Noise
Noise
Signal
Including
Noise
27
54
108
54
MHｚ-Sampling
Video
Noise
Noise
Signal
27
54
108
108
MHｚ-Sampling
Video
Noise
Signal
27
54
108
216
MHｚ-Sampling
Video
Signal
27
54
108
Luminance Channel (Y)
Sampling Frequency
13.5 MHz
27 MHz, effective
Noise
Noise
Noise
216
Noise
Noise
216
Noise
216
Noise
216
B
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