D-ILA Technology Contrast/Grayscale, Color, Scaling, Deinterlacing

D-ILA® Technology
Contrast/Grayscale, Color,
Scaling, Deinterlacing/Motion
Rod Sterling
JVC North America R&D Center
Cypress, CA
Agenda
•
•
•
•
•
•
•
D-ILA technology
Advantages in video imagery
D-ILA Analog Backplane
D-ILA Digital Backplane
HRM1
HD-ILA PRO
Summary
Rod Sterling
2
D-ILA Development
Analog Backplane
o 1998- 0.9 inch 1350 x 1020 pixels
o 2000- 0.7 inch 1400 x 1050 pixels
o 2000- 1.3 inch 2048 x 1536 pixels
o 2001- 1.7 inch 3840 x 2040 pixels
o 2003- 0.8 inch 1920 x 1080 pixels
o 2004- 1.7 inch 4096 x 2160 pixels
Digital Backplane
o 2004- 0.7 inch 1280 x 720 pixels
o 2005- 0.7 inch 1920 x 1080 pixels
Rod Sterling
3
Key to D-ILA image quality
• No Screen door effect
– Large aperture ratios >90%
– Liquid Crystal Fringing Effect smooth's out pixel to
pixel modulation
• High contrast Ratio
– >5000:1 on device
• Liquid Crystal
–
–
–
–
Final output is liquid crystal modulated
Give smooth film like look
Analog feel of film, no integration of eye required
Reduces eye strain
Rod Sterling
4
Technology Comparison
Rod Sterling
5
Images on each device
LCD
D-ILA
DMD※※
Narrow pixel gap brings
natural picture
Aperture：40%-60%
Aperture：93%
Aperture：88%
Bias
Bias
Expression of Gradation
with Twist Nematic
（Horizontal Alignment）
Expression of Gradation
with Twist Nematic
（Vertical Alignment）
Rod Sterling
* Trademark of Texas Instruments
Expression of Gradation
with tilted mirror
6
Light Output
Behavior of Vertical-alignment
Liquid Crystal
S
S
S
P
LSI
Features of
Vertical-alignment LC
Driving Voltage
Normally-black Operation
(highly controllable for black)
High contrast Ratio
∗Small dispersion at any wave length
∗Small dependence on the light angle
High-speed Response
Rod Sterling
7
Picture with contrast, feeling and gradation
• Capability to express that
white is white or black is
black
• Capability to reproduce
the gradation from black
to white
• Nice reproduction with
linear reproduction for
middle range and
compensated input or
output level in dark and
bright portion
Rod Sterling
8
48” HRM1 Reference Monitor
• Ideal for Post production
and broadcast
• CRT reference monitor
replacement
• Rec. 709 color
• External HQV Scalar
powered by Teranex
• Programmable LUTs and
gamma tables
• 12 Bit processing
Rod Sterling
HRM1
9
HQV Scalar/Decoder
•
•
•
•
External Scalar/Image processor
HD-SDI/DVI/HDMI/Analog/PC/MAC inputs
Up to QXGA input and outputs
Programmable LUT and Gamma tables
Rod Sterling
10
Color management
• Programmable
Color Space
Conversion
Rod Sterling
11
Color Primaries
CIE 1976 UCS CHROMATICITY DIAGRAM
v'
HD2K
ITU-R BT.709-4
HRM1
Rod Sterling
12
Scaling
•
Typical image artifacts
– Blurring image to hide jaggies
– Shrink quality much lower quality than zoom
– Shrink requires a large amount of processing resources
•
Solution
– Pixel-by-pixel processing using a large number of input pixels to produce
one output pixel
Rod Sterling
13
Noise Reduction
Noisy - Unprocessed
Clean - Processed
• Noise in the source content for both SD and HD
• Highly visible on larger than 30-inch fast
response-time displays
– “My new TV looks worse than my old one”
Rod Sterling
14
MPEG Compression Block Artifacts
• MPEG block artifacts occur due to overly
aggressive compression
– Especially apparent during high motion scenes
Rod Sterling
15
Noise Reduction
(small portion of HD image)
• Poor noise reduction technology causes
undesirable artifacts
– Image blurring, softness and reduction of detail
Rod Sterling
16
Mosquito MPEG Noise Compression
• MPEG mosquito noise artifacts occur due to overly
aggressive compression
– Especially apparent in the image where edges appear against a
flat background
– Especially apparent with large screen sizes
Rod Sterling
17
PRO HD-ILA Rear Projection TV
•
•
•
•
•
•
61” and 72” HD-ILA Pro models
Digital D-ILA backplane
D65 color
HDMI input
>5000:1 CR VAN Cell
Video Processing
– DIST (Digital Image Scaling
Technology)/Genessa Processing
– 5 Point Color Management
Technology
Rod Sterling
18
3rd Generation Optical Engine
P-wave
P波
‰ PBS (Newly designed PBS)
• Brightness improvement (Transmission
improvement: F number / Glass material)
• Contrast improvement
• Color reproduction with reducing heat
birefringence)
PBS の動作原理
Principle
S-wave
S波
‰ Optical Lens improvement
• Peripheral resolution performance
• Brightness improvement
• Chromatic aberration improvement
新
New
現行
Current
‰ Optical iris
• Dark shading improvement
• Dark gray scale improvement
Open
＜Bright room＞
Close
＜dark room＞
Bright state
Dark level and gray scale
Best for to watch
sports program Best for movie program
Rod Sterling
19
Digital driving Principle
Subframe-40
Subframe-40
2^24 possible arrangements
1 frame
(=16.7msec)
24 bit-plane
- 40 Subframes
Each Subframe length
is freely adjustable.
Subframe-1
1920 x 1080
Addressing
Subframe-1
Liquid Crystal
Driving
Rod Sterling
In practice 1024
addressable states are
generated
20
Gray Scale
Electro-Optical Curve at Digital Driving
1
0.9
0.8
Output Light
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0
200
400
600
800
1000
1200
Gray Level (Selected Pulse arrangements)
10 bits selected out of 24 bit possible
combinations
Rod Sterling
21
Dynamic Gamma Control
• Modified original
Dynamic Gamma
Control
• Multi-frame analysis
for smooth gamma
adjustment in high
motion scenes
• 10bit to virtual 14bit
dither scaling
Rod Sterling
22
5
Point
Color
Management
•Adds an extra axis to
color management
circuit for improved
color reproduction of
skin tones
•Local sampling
process targets specific
color regions
Red (Fresh, but less blue)
New axis: Skin tone
Yellow (natural, less green)
Skin tone (warmth natural)
Green (Bright, less Yellow)
Blue (Clear Blue, less green)
Rod Sterling
23
Digital Noise Suppressor
•
•
Automatically detects and eliminates block noise inside MPEG video
including Off-Air digital
A new processing method that is effective for noise inside gradation
– no degrading the image resolution
Radical step caused by
block noise
8 pixels
Block noise
Conventional
method
Step
New
method
Step
• Corrects DC component
of a block
• Does not interfere with
upper frequency of the
Rod Sterling
image
24
Mosquito Noise Suppressor
•
•
Highly effective random and mosquito noise suppression in
MPEG video with the newly developed non-linear algorithm
Changes the processing mode to suit the noise
characteristics for optimum noise elimination inside digital or
analog broadcasting
Original Image:
• Mosquito noise generates
around edges of upper
frequency range
New Image:
• Analyze the noise pattern, and
surrounding image element
• Eliminates noise without degrading the
Rod Sterling
25
original image
Adaptive Picture Quality Control
•
•
•
Detects picture noise in real-time and
controls
the amount of noise reduction as needed
Adaptive processing for DVD input
Frame-level optimization of 2D and 3D NR
and enhancer from CPU
NR
Noise detection
Current Method:
• Detects noise from
only invariable
portions such as
sync signals
Enhancer, etc.
CPU
Real-time detection
of noise level in
the moving image
New Method:
• Development of a new
algorithm that first identifies
the movement of the video
and random noise, then
performs stable detection of
the amount of noise in the
video
Rod Sterling
26
I-P Conversion
•
•
•
Detects the angle of skewed line and
optimally corrects: Drastically smoothens jagged
lines that are apparent on skewed lines in moving picture
Increase in the area of movement detection reduces defocus and
jagged lines that are generated from slow moving images
Full HD (1920 x 1080p) compatibility
Current Method
New Method:
• Compared to current method, the new method
drastically reduces jagged lines that are
Rod Sterling apparent on skewed lines
27
3DY/C w/ DTV Cross Color Eliminator
•
•
•
Removes cross color/dot interference that remains inside digital
broadcasting signal （component signal)
Content quality of so-called “high-definition” broadcasting can
vary – improves broadcasting with interference
First time to adopt 10bit 3D Y/C separator
Conventional 3D Y/C
Separation is valid only on
the analog composite input
Analog broadcasting
Composite signal
Analog
Tuner
3D Y/C Separation
+
Color Decoder
New 3D Y/C
Separation
+
Color
Decoder
Digital
Tuner
Interference caused by cross color
Cross color and dot interference
that remains within digital broadcasting couldn’t be eliminated with
conventional system.
Rod Sterling
Cross color and dot interference that
remains within digital broadcasting are
reduced by adopting 3D Y/C process for
28
component signals
Summary
• 48” HRM1Ref Monitor
–
–
–
–
–
–
–
–
–
• 61”/70” HD-ILA PRO
1920x1080P
Rec. 709 / D65
All line rates supported
Fully programmable scalar
Native 1:1 modes for true
input reproduction
Great in all ambient
conditions
Zero overscan and optical
underscan without distortion
Low maintenance cost
Portable between suites
Rod Sterling
– 1920x1080 P display
– Latest Generation HD-ILA
technology using digital
backplane
– Rec. 709 / D65
– HDMI inputs / HDTV Line
rates
– 5 point color correction
– Noise reduction
– Nature gray scale
29
Thank You