Resumé of Douglas C. Stevens
Consulting (April 2013-present)
- Developed framework to process sports
transcripts, uploading text files and converting to TTML/XML, HTML,
and pdf, creating landing pages, distributing to content-management
sites, providing notification to clients and the press, etc. Used at
The Open (The R&A), US Open (USGA), Women's US open (USGA),
US Senior Open (USGA), US Amateur Championship (USGA),
Quicken Loans National (PGA Tour),
Deutsche Bank Championship (PGA Tour), PGA Championship (PGA),
Ryder Cup (PGA), US Open (USTA).
- Designed/wrote quicktime and HDS multiplexers. Co-responsible for
design and feature additions to MXF (Smpte 377) demultiplexer.
Co-responsible for implementing
Elemental Stream (remultiplexer) product. Co-responsible for maintaining
Adobe RTMP multiplexer. Integrated Dolby DigitalPlus decoder (for AC-3
and EAC-3) and Dolby-E decoder into system.
Designed/wrote subsystem converting NTSC captions ("608") to EIA/CEA-708
("DTV") captions. Designed/wrote scripts to parse and report MPEG-2 and
H264 video elementary streams, MPEG-2 system (transport and program)
streams, Quicktime/MP4/AdobeHDS streams, MXF and GXF (Smpte 360)
(Sept 2010 - June 2011)
- (Following Harmonic's purchase of Omneon Video Networks). Implemented
support for Panasonic AVCI codec in the MIP 7000 series product line.
Implemented support for another MPEG encoder.
- Architected, designed, and implemented software for the MediaPort
product line, including MPEG program stream demultiplexer, DV, DVCPRO,
MPEG, and IMX drivers for the C-Cube codecs, IBM decoders,
Zoran/Teralogic decoders (involving extensive re-write of a 475K-line
code base to support re-entrancy), MainConcept codec (CPU-based
DVCPRO-HD encode and decode), Firewire (1394) AV/C target,
drivers for RS422, VITC and LTC, AES/EBU audio, VANC, SDI video,
genlock (reference), and an Omneon-designed video FPGA.
For the central controller ("Director"),
architected, designed, and implemented the AV/C VTR target and Louth
listener. Developed bitstream parser/verifiers for MPEG-1/2 video
elementary streams, MPEG-2 program streams, MPEG-2 transport streams,
DV/DVCPRO25/DVCPRO50/DVCPRO100 streams, and MXF streams. These bitstream
tools are used extensively in verification of customer-supplied clips.
Responsible for triage of field issues for MediaPort products.
- Video and Networking Division.
One of the core team of architects which designed the
Emmy-award-winning Profile video disk recorder.
I was responsible for architecture, design, and implementation of:
Windows NT inter-processor communications library (including some NT
kernel drivers), VdrPanel (the primary user-interface GUI), and RS422
protocol listeners (Louth, Odetics, and Sony Betacam). Specified and
designed the first release of the Profile RS422 protocol
(used by numerous third-party developers). Project leader for the MPEG
encoder/decoder system for Profile: architected the system, designed
and implemented the decoder system, and supervised and coordinated
other engineers in the design of the encoder system.
- Television Division. Designed video waveform editor and
programmable waveform board for TSG1050/1125/1250 HDTV generators.
Project leader for TSG1001 programmable HDTV generator (used by the ATTC
and CableLabs for testing of proposed HDTV standards for the government).
Project leader for PE1001 high-BW PAL generator. Project leader for WFM601
serial-digital waveform generator (fast-track project). Researched
algorithms for quantifying quality of compressed-video signals.
- Portable Oscilloscopes Division. SW project leader for
2245/46/46A/47 scopes. HW/SW architecture; HW design of processor system
and front panel; SW design of front-panel, DAC, and A/D system;
supervision/coordination of 3 SW and 2 HW engineers.
- Portable Oscilloscopes Division. Evaluation engineer.
Projects included 2235/6/7, 2445/65 scopes.
Academy of Television Arts & Sciences
1996 Primetime Emmy Awards
"Outstanding Achievement in Engineering Development"
- US Patent 4,754,205 Issued June 28, 1988
"Oscilloscope having auxiliary display of a labeled cursor"
- US Patent 4,743,845 Issued May 10, 1988
"Oscilloscope-based signal level measurement system"
- US Patent 4,868,465 Issued September 19, 1989
"Sweep generator error characterization"
- US Patent 5,049,880 Issued September 17, 1991
"Bit-wise run-length encoding for data compression"
- US Patent 5,214,508 Issued May 25, 1993
"Spatial bandwidth testing for digital data-compressed video systems"
- US Patent 5,274,445 Issued December 28, 1993
"Three-dimensional testing of video codecs"
- US Patent 5,387,92 Issued January 7, 1995
"Test signal generator position cursors"
- US Patent 5,455,620 Issued October 3, 1995
"Automatic generation of vector reference graticules"
- US Patent 5,642,497 Issued June 24, 1997
"Digital disk recorder using a port clock having parallel tracks along a
timeline with each track representing an independently accessible media
- US Patent 7,876,355 Issued January 25, 2011
"Video abnormality detection"
- German: fairly comfortable.
- French: good basic skills.
- Hungarian: beginning/progressing.
Last updated 2015-04-21