Sony DVP-NS9100ES, NS3100 manual MH ｚ-Sampling

	Luminance Channel (Y)	Luminance Channel (Y)
	Bandwidth	Sampling Frequency
DVD-Video Interlaced	6.75 MHz	13.5 MHz
Playback
DVD-Video Progressive	13.5 MHz, effective	27 MHz, effective
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 (PB and PR).

27 MHｚ-Sampling
Loss	Analog-Filter
Video	Noise	Noise	Noise	Noise	Noise	Noise	Noise	Noise
Signal
	Including
	Noise
	27	54		108				216
54 MHｚ-Sampling

Video	Noise	Noise	Noise	Noise
Signal
27	54	108		216

108MHｚ-Sampling

Video	Noise	Noise
Signal

27	54	108	216
216 MHｚ-Sampling
Video			Noise
Signal
27	54	108	216

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 Page 21