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

GPS Navigation Systems Expert Profile

Experienced engineer and product manager who has been working with leading-edge navigation technologies for twenty-five years.

Microprocessor Design Expert Profile

Adjunct professor of electrical and computer engineering with years of industry experience in the design of microprocessors for infotainment and multimedia systems, as well as wireless and GPS systems.

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. 

Digital 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.

Cellular Communications Expert Profile

Long-time independent engineering consultant in the design of both electronics and software in constant demand from a wide variety of clients.

Expert J520S

Long-time independent engineering consultant in the design of both electronics and software in...

Expert K642K

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

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 G615N

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

Expert B420K

Experienced engineer and product manager who has been working with leading-edge navigation...

Expert B624L

Adjunct professor of electrical and computer engineering with years of industry experience in...

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