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Signal Processing
Barr Group's multimedia and signal processing expert witnesses assess patent portfolios and advise attorneys in litigation. Our experts have hands-on experience designing products that perform multimedia functions and process audio/video/image data and other streaming signals in real-time. They also have demonstrated experience testifying in high-stakes IP litigation.
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Audio/Video/Image Processing and DSP
Barr Group's signal processing experts are in the business of designing electronics and software that manipulate audio, video, image, and other data using analog and digital filters, for uses such as:
- Lossy and lossless data compression techniques
- Audio encoding and formats such as MP3/M4A, 3GP, WMA
- Streaming video coding/codecs including MPEG and H.264
- Error detection and correction and associated ECCs, CRCs, etc.
- Facial recognition algorithms including machine learning
- Image processing and AI for feature extraction
- Machine vision in self-driving vehicles and factory automation
- Streaming audio and video services and apps (Spotify, Netflix)
- Automatic music detection technologies a la Pandora
- Speech recognition and natural language processing (NLP)
- Voice recognition and other biometric security apparatus
- Digital music instruments and recording/mastering equipment
- Video recording, storage, and playback
- Fitbit-like step trackers as well as heart-rate monitoring equipment
- Array processing of data from distributed sensors
Barr Group's software engineers are familiar with all of the major technologies used to perform signal processing, including DSP and GPU processors and their specialized real-time operating systems as well as the full range of programming languages from assembly and C/C++ to Matlab and Labview. We also understand analog and digital electronics.
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Expert Witness Services
Barr Group's multimedia and signal processing experts support plaintiffs and defendants in litigation in U.S. District Courts, at the International Trade Commission (ITC), and before the Patent Trial and Appeal Board (PTAB). Our services include:
- Technical assistance with drafting of discovery requests
- Software source code review and analysis
- Source code comparisons for copyright and trade secret theft
- Prior art review for patent invalidity
- Analysis of electronics and related design documents
- Reverse engineering, including disassembly of binary code
- Forensic analysis, including multimedia metadata extraction
- Expert reports, declarations, and witness statements
- Testimony at deposition, oral hearings, and trials
Barr Group has a demonstrated ability to quickly activate one or more experts to match the size, scope, and complexity of any project.
The following is a representative subset of Barr Group's experts who have experience designing and/or testifying about these technologies:
System-on-Chip Mixed-Signal ASIC Expert Profile
Communication Theory and DSP Expert Profile
Microwave and RF Electronics Expert Profile
Automated Surveillance Systems Expert Profile
Vehicle Navigation Sensor Fusion Expert Profile
End-to-End Network Architecture Expert Profile
High-Speed Communication Interfaces Expert Profile
Advanced Military Radar Systems Expert Profile
Digital Cellular Mobile Radio Expert Profile
Physical Layer Communications Expert Profile
Computer Vision and Perception Expert Profile
Wireless Power Transfer Expert Profile
Spread Spectrum Communications Expert Profile
GPS-Guided UAV Flight Systems Expert Profile
Computer Music and Multimedia Expert Profile
Wireless and Cellular Standards Expert Profile
Electronic Warfare and Cybersecurity Expert Profile
Parallel Processing Architectures Expert Profile
Internet and Cellular Standards Expert Profile
Semiconductor Fabrication Expert Profile
Electric Power Conditioning Expert Profile
Fingerprint Biometric Systems Expert Profile
Streaming Multimedia Expert Profile
Image and Facial Recognition Expert Profile
Video Game & Casino Gaming Expert Profile
Online and Casino Gaming Expert Profile
Cluster & Supercomputing Expert Profile
Cellular Wireless Air Interface Expert Profile
Professor of electrical engineering and computer science with decades of R&D experience in communications networks and wireless signal detection and estimation.
Deep Learning & A.I. Systems Expert Profile
Speech-Based Interface & RFID Expert Profile
Consultant and former professor of computer science with decades of hands-on experience in speech recognition, IVR, RFID, streaming multimedia, and data encryption.
Speech & Voice Recognition Expert Profile
Haptic Input & Virtual Reality Expert Profile
Professor of engineering with decades of experience developing novel technologies and expertise in virtual reality, streaming multimedia, image processing and computer vision, artificial intelligence, and robotics.
Drone & UAV Navigation Expert Profile
USAF Academy researcher in image processing and GPS-denied navigation with decades of experience in control systems design and DSP algorithms for applications including drone unmanned aerial vehicles (UAVs).
Acoustics & Audio Processing Expert Profile
Professor of electrical engineering who has spent over two decades researching and inventing algorithms at the intersection of acoustics, digital signal processing, and machine learning.
Medical Image Processing Expert Profile
Research scientist and independent consultant with a Ph.D. in electrical engineering and specialized expertise in signal, image, video, and content processing and data compression.
Nanoelectronic & MEMS Sensors Expert Profile
Professor of electrical and computer engineering with decades of experience at the forefront of the design and fabrication of microelectromechanical systems (MEMS) and nanoelectronic devices.
Surveillance Camera Networks Expert Profile
Stanford-educated professor of electrical engineering and computer science whose career in industry began at AT&T Bell Labs and has specialized expertise in cyber-physical systems, IoT technologies, and computer vision.
Manufacturing Automated Test Expert Profile
Registered Professional Engineer (PE) with several decades of hands-on industry experience developing products and software for industrial, consumer, enterprise, military, and medical applications.
Virtual Reality Worlds & Gaming Expert Profile
Energy Storage and Transfer Expert Profile
Professor of electrical and computer engineering with over twenty-five years of experience in materials science, systems engineering and design of microelectronics.
Vehicle Sensor & Electronics Expert Profile
Independent consultant and former professor of technical product management with decades of industry experience in automotive sensors, electronics, and systems.
Naval & Underwater Systems Expert Profile
Engineering consultant with nearly thirty years of hands-on software development experience designing products ranging from autonomous underwater robots to cable modems and set-top boxes.
Space and Satellite Systems Expert Profile
Adjunct professor of computer science and independent consultant with decades of experience in the field of telecommunications and information security. Has specialized technical expertise in GPS, VPNs, digital and analog electronics including RF signals and antennas, data communications and networks including fiber-optics, cellular protocols, and communication satellites.
Smartphone Software & Apps Expert Profile
Computer engineer and consultant with more than two decades of industry experience developing software for embedded systems and mobile apps powered by Android, Linux, Windows, and real-time operating systems such as VxWorks.
Video Encoding & Streaming Expert Profile
PhD electrical engineer and data communications expert with three decades of professional industry and research experience in areas such as video encoding and imaging technologies, digital signal processing (DSP), lossless data compression, and computer security. Areas of specialized technical expertise also include Amazon AWS and other cloud computing platforms.
Optical Systems & Interfaces Expert Profile
Physicist with over three decades of industry experience and a prolific innovator in electro-optical systems who invented a new type of optical microscopy, co-invented solid immersion microscopy, designed the first commercial atomic and magnetic force microscope, and invented a laser noise canceller. Has specialized technical expertise in analog circuit design, low noise circuits, optical systems, instruments, and measurements, interferometry, ultrasensitive measurements, and silicon photonics.
High-Performance Computing Expert Profile
Analog & Digital Electronics Expert Profile
Electronics and computer science expert with more than twenty-five years of hands-on experience analyzing, designing, and implementing real-time systems for commercial, industrial, and military applications. Has been chief architect or technical lead on numerous projects covering all aspects of the architecture and development of electronics (including circuit boards and FPGAs), embedded software, network and communication protocols, and graphical user interfaces.
Fault Tolerant Computing Expert Profile
Electrical and computer engineering professor with decades of experience in computer architecture and design who has been recognized as one of the top innovators in the first half century of the history of computing. Has specialized technical expertise in bio-robotics, medical devices, actuators, mechatronics, fault tolerant computing, processor cache and memory design, high speed networks, storage subsystems, and system performance evaluation.
DSP and Data Compression Expert Profile
Consultant and professor of electrical and computer engineering who is a named inventor on about twenty issued U.S. patents on digital signal processing (DSP) and digital receiver technologies. Teaches university courses in DSP and communication systems and writes and speaks throughout the world on applications of DSP. Also consults in advanced DSP-based communications systems.
Global Positioning Systems Expert Profile
Electrical engineer with substantial design experience in the fields of GPS and navigation systems, digital signal processing, semiconductors, image processing, and software-defined radio for airborne and ground-based systems and devices in the military, agricultural, industrial, and other markets. Experience includes technical team and architectural leadership for multiple product launches.
TCP/IP Internet Protocols Expert Profile
Software and systems engineer with several decades of hands-on experience in the design and implementation of complex embedded systems based on Linux, Windows, and real-time operating systems. Specialist in Internetconnected products such as consumer electronics and IoT devices using WiFi 802.11, GSM/LTE cellular, and other wireless and wired protocols. Also has experience with FPGAs and implementing M2M communications through the use of Microsoft .NET-based web services.
Smart Grid Electrical Power Expert Profile
Professor of electrical and computer engineering with significant industry experience in telecom, aerospace/defense, security, and healthcare application domains. Director of a university program that supports NASA’s Johnson Space Center and co-director of a connected infrastructure program that prototypes smart grid, smart energy, smart transportation, and other smart city projects. Research relates to those and other topics that touch on embedded computing systems and communication and networking protocols.
Mechanical Electrical Software Expert Profile
Mechanical engineer with hands-on experience in all phases of product engineering, including system architecture, system engineering, system modeling, system integration, mechanical and electrical design, as well as software and firmware development and testing. Areas of deep technical specialization include electronics design and simulation, digital signal processing (DSP), and software development in a range of programming languages.
Android & iOS Mobile Apps Expert Profile
Computer scientist and inventor with decades of hands-on experience applying emerging technologies to create successful software applications and apps for a variety of computing platforms, including Android and iOS smartphones, Macs, and Windows PCs.
Settop On-Screen Guide & DVR Expert Profile
Ultrasound Medical Imaging Expert Profile
Former assistant professor of electrical and computer engineering and Oxford-educated materials scientist whose areas of specialized technical expertise include design of semiconductors and other electronics and sensors and micro-electromechanical systems (MEMS) as well as signal and image processing. Industry experience includes working for and consulting with multinationals such as General Electric, Medtronic, Fujifilm, Samsung, and Siemens on projects relating to medical devices, consumer electronics, biometric security, clean-tech, and electrical power delivery.
Video Game Computer Graphics Expert Profile
GPS & Navigation Systems Expert Profile
Microprocessor Design Expert Profile
FPGA & Semiconductor Design Expert Profile
Electrical engineer and independent consultant specializing in the design of microcontroller-based embedded control systems, especially those with a wireless communications requirement.
Audio Signal Processing Expert Profile
Over forty years of academic and engineering experience and twenty years of expert witness experience in computer science, software development, embedded systems, enterprise software, and especially signal processing for audio and music technology.
Communications System Expert Profile
Professor of electrical engineering with extensive experience as a technology industry practitioner.
Mobile & Wireless Networks Expert Profile
Professor of electrical engineering and an award-winning innovator in the areas of wireless communication systems and mobile networks who has testified as an expert witness.
Cellular Communications Expert Profile
Independent engineering consultant in the design of both electronics and software with a formal education in electrical and mechanical engineering.
Electronics and computer science expert with more than twenty-five years of hands-on experience a
Computer scientist and inventor with decades of hands-on experience applying emerging technologies to create successful software applications and apps for a variety of computing platforms, including Android and iOS smartphones, Macs, and Windows PCs.
Registered Professional Engineer (PE) with several decades of hands-on industry experience developing products and software for industrial, consumer, enterprise, military, and medical applications.
Professor of electrical and computer engineering with decades of experience at the forefront of the design and fabrication of microelectromechanical systems (MEMS) and nanoelectronic devices.
Professor of electrical engineering and computer science with decades of R&D experience in communications networks and wireless signal detection and estimation.
Independent engineering consultant in the design of both electronics and software with a formal education in electrical and mechanical engineering.
Professor of electrical engineering with extensive experience as a technology industry practitioner.
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