Audio Video DSP Experts

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.

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The following is a representative subset of Barr Group's experts who have experience designing and/or testifying about these technologies:

Signal Processing

Video Encoding and 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 and 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

Professor of electrical and computer engineering and expert in architectural paradigms and technologies for high-performance computing and distributed computing. Research spans a range of areas from semiconductor design to compilers and database systems. Has organized workshops on graphics processors (GPUs) and computer security as well as binary translation and profiling.

Analog and 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.

Internet Protocols and IoT 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. Has held executive and senior engineering positions

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.


Expert S416N

Electronics and computer science expert with more than twenty-five years of hands-on experience...

Expert H400L

Computer scientist and inventor with decades of hands-on experience applying emerging...

Expert J520S

Independent engineering consultant in the design of both electronics and software with a formal...

Expert K642K

Professor of electrical engineering with extensive experience as a technology industry...

Expert H620S

Consultant and professor of electrical and computer engineering who is a named inventor on about...

Expert H120S

Physicist with over three decades of industry experience and a prolific

Expert L555N

Professor of electrical engineering and an award-winning innovator in the areas of wireless...

Expert L000L

Over forty years of academic and engineering experience and twenty years of expert witness...

Expert H623T

Electrical and computer engineering professor with decades of experience in computer...

Expert G615N

Electrical engineer and independent consultant specializing in the design of microcontroller-...


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