Yamaha DPX-1100 User Manual download pdf (Page 7)

appears exceptionally free of dithering and

MPEG mosquito noise.

HDTV

The DPX-1100 produces an excellent

high-definition picture that I would charac-

terize as exceptionally natural and coherent.

It doesn’t have motion-adaptive deinterlac-

ing for 1080i video sources, which results in

a slightly softer picture, but in return it has

fewer annoying deinterlacing artifacts. The

p i c t u re is especially free of pixelization when

a camera pans across an area of complex

structure and fine detail. There is also no

abrupt change in sharpness at the transition

between a still image and a slowly moving

image.

NBC’s Tonight Show With Jay Leno pro-

vides some of the most stellar images for

evaluating HDTV picture quality. The color

with the Rec. 709 colorimetry setting was

outstanding. The kaleidoscope of vivid hues

in the complex backdrop was brilliant, while

the skin tones of Jay and his guests were

completely natural. Picture clarity was par-

ticularly impressive as a high-definition stu-

dio camera slowly zoomed in on newspaper

clippings. The printing was legible during

the entire zoom, and the printed characters

were completely free of edge outlining and

jaggies.

NBC also broadcasts Las Vegas, one of

the most visually impressive prime time

HDTV series. The interior sets are in Los

Angeles, but they faithfully reproduce the

glitz and glitter of a major Sin City casino. In

the episode I watched on the DPX-1100, the

color palette was brilliant, but flesh tones

bordered on over-saturation. Network HDTV

series tend to be slightly over-saturated,

while many high-definition movies aren’t.

Many of the monitors used for HDTV pro-

duction still have SMPTE-C (Rec. 601) pri-

maries with no electronic correction, so

sometimes you may get better color accura-

cy using the Rec. 601 colorimetry values.

This situation should change as HDTV pro-

duction matures. Of course, there will always

be the human element and some HDTV

material will be over-saturated, just as some

DVDs are. In that case, the DPX-1100 wisely

p r ovides a color saturation control that works

with all analog and digital video signals.

The DPX-1100 doesn’t have inverse-

telecine deinterlacing for 1080i film-source

video with 2-3 pulldown. The primary con-

sequence is that line twitter (wobble) is

occasionally noticeable when a camera

moves vertically over sharp horizontal

edges. For instance, I observed line twitter

on the edges of a license plate and the

slats in a park bench while watching D-

Theater movies. Fortunately, line twitter is

less objectionable with high-definition video

because horizontal lines (rows of pixels) are

much closer together than they are for stan-

dard-definition video.

Images are also slightly softened

because the 1080i fields (1920 x 540) must

be interpolated into 720p frames, rather

than merged into 1080p frames. But 1080i

sources are vertically pre-filtered to prevent

inter-line flicker on CRT-based interlaced

displays, so 1080i vertical resolution is

already limited. Even with inverse-telecine

deinterlacing, the resulting 1080p frames

have to be scaled (interpolated) down to

the native 720p resolution. So, there is only

a small difference in the sharpness of 1080i

film sources between 720p projectors with

inverse-telecine and those without it.

U-571 is probably the D-Theater

™

movie

that most benefits from the exceptional

equipmentReview

Widescreen Review • Issue 88 • September 2004

Page 7/7

black level and contrast of the DPX-1100.

Its many dark submarine interior scenes

were hazy and lacked image depth with

previous generation DLP projectors, and it

only came alive in home theatres with CRT

projectors. But now that’s changed. The

DPX-1100 renders U-571 with the clarity,

three-dimensionality, and shadow level dis-

crimination that I first saw at the cinema.

K-PAX is another D-Theater movie trans-

fer that looks stunning on the DPX-1100.

Light plays a central role in the film as plot

device and to create a dramatic atmos-

phere. There are intensely bright and

extremely dark images that need the full

dynamic range of the projector’s exception-

al contrast ratio. The color accuracy is

superb, and the film is filled with rich, vivid

colors, but never looks oversaturated. The

exceptional black level combined with deep

blues and purples made the planetarium

scene breathtaking.

Summary

The Yamaha DPX-1100 Digital Cinema

Projector produces exceptional DVD and

HDTV picture quality. It combines Texas

Instruments’ latest 720p HD2+ DLP technol-

ogy with a new seven-segment color wheel

and iris to deliver the highest contrast ratio

and best black levels I have ever obtained

from a fixed-pixel projector. The gray scale

performance is excellent right out of the

box, and Yamaha’s innovative Color

Adjustment system provides the ability to

precisely match the colorimetry standards

of high-definition and standard-definition

video for exceptional color accuracy. If you

are in the market for a new projector, the

Yamaha DPX-1100 should be on your list of

products to audition. ■ ■

Provided By

Issue 88, September 2004 of Widescreen Review

, “The Essential Home Theatre Resource.

™

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