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
Full Title: 
Experts in Multimedia and Signal Processing

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

Former professor of software engineering with over 25 years of hands-on experience in speech recognition, artificial intelligence / machine learning, computer vision, data centers, and blockchain.

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

Professor of computer science with over two decades of experience at the forefront of the analysis and processing of electronic documents and document images as well as expertise in speech processing and voice input.

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.

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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 D420S

Registered Professional Engineer (PE) with several decades of hands-on industry experience...

Expert S163T

Professor of electrical and computer engineering with over twenty-five years of experience in...

Expert Y520K

Professor of electrical and computer engineering with decades of experience at the forefront of...

Expert M500N

Professor of electrical engineering and computer science with decades of R&D experience in...

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 K000L

Research scientist and independent consultant with a Ph.D. in electrical engineering and...

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