2. 1985 – 1996 Scitex Corp. (Herzliya)
Creation of expert system for graphic designers (textile &
printing)
Responsibility for three big projects.
• Photoshop-like image processing. All kinds of picture changes.
Color correction (local & global). Multi-color correction.
1D, 2D & 3D changes for Red, Green, Blue.
• Color matching. Full color coincidence between printed image
and the same image on the monitor. Development of original
Human-Vision oriented algorithm for CMYK RGB conversion
for different kinds of printers.
• First attempt to create full CMS (Color Management System)
which includes printers, scanners & monitors.
• RGB XYZ Lab CMYK XYZ Lab RGB
conversion, including parameters for all kinds of different
3. VIDEO: COMPRESSION EVOLUTION
1990 – 2000 MPEG2 (Motion Pictures Expert Group)
Video Compression (from up to 20 times to up to 100
times)
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2000 – 2010 MPEG4 (AVC, H264) (advanced MPEG2)
Video Compression (up to 200 times)
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----------------
2010 – 2020 HEVC (H265) (High Efficiency Video Codec)
Video Compression (up to 400 times)
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----------------
Usually, “up to N times” means that picture/video can be
compressed
up to N times, while Video Quality will still remain acceptable.
4. 1996 – 2000 ECI Telecom (Petach
Tikva)
Video Quality Algorithms Expert at HiTV group.
MPEG2 compression.
Compression algorithms: learning, development and verification.
Optimization of compression parameters:
Bit Rate Control mechanism (constant or variable)
Quantization matrices (luminance & chrominance)
Scene Change behavior
GOP length & GOP structure
Bits distribution between different types of frames, etc.
Creation of Video Quality Estimation System (first attempt).
Creation of Video Quality lab.
Encoders Video Quality comparison (subjectively and objectively).
5. 2000 – 2011 Big Band (Tel Aviv)
Video Quality Algorithms Expert.
MPEG2 & MPEG4 (H264) compression.
Creation of big, well-equipped Video Quality lab,
for subjective and objective VQ estimation:
Encoders, Transcoders, Bit Rate Reduction devices, etc.
Bit Rate Reduction algorithms: development and verification.
Co-author of 3 patents for prioritized bit rate conversion.
Author of SVQA (Software Video Quality Analyzer)
for both MPEG2 & H264 compressions.
Member of VQEG (Video Quality Experts Group)
Member of T1A1 group on Video Quality Metrics
(American National Standard for Telecommunications)
6. From 2011 Arris Corp. (Tel Aviv)
Video Quality Algorithms Expert.
MPEG2, H264 and HEVC compression
MAS (Managed Adaptive Streaming) – algorithm development
for
different devices: monitors, TV (SD & HD), IPAD, smartphones,
etc.
Development of original Human Vision’s based algorithms
for Video Quality assessment, including completely new
algorithm
for HEVC (High Efficiency Video Codec).
Author of new SVQA (Software Video Quality Analyzer)
for all kinds of video compression: MPEG2, H264, HEVC.
7. TWO MAIN GUI FOR HEVC VIDEO QUALITY ANALYZER
1
2
Reference
TEST
Reference
TEST
Map of color
Differences
VQ MAP
VQ MAP
COMPRESSION
INFO (REF)
COMPRESSION
INFO (TEST)
PSNR MAP
SSIM MAP
Map of color
Differences
YUV
ONLY
HEVC
box
VQ
box
