Digital Voice Expert Witnesses

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Digital voice expert witness candidates typically have an advanced degree, and a background in electrical engineering, computer engineering, or computer science. Experts in digital voice may have an affiliation with a technical industry organization such as the IEEE. Experience in forensic analysis (for example audio forensics, computer forensics or digital forensics), can be important for a case. A forensic expert can reverse engineer components to prove (or disprove) intellectual property infringement or theft, as well as assist law enforcement with an analysis of audio evidence.

A digital voice expert witness often provides expertise in intellectual property matters such as a patent litigation or a trade secret dispute. Litigation support by a digital voice expert could include an audio analysis, a forensic investigation, expert report preparation, expert opinion, deposition testimony, and courtroom testimony. In a high-profile case, or litigation involving a significant financial stake, a law firm may request a technologist with prior expert witness testimony experience. Lead counsel may also seek a digital voice subject matter expert for pre-litigation consultant work.

Cahn Litigation Services has a vast expert network and often receives requests from attorney clients, representing the plaintiff or defendant, to help locate a digital voice expert witness. Cahn Litigation Services has worked on sourcing experts for numerous projects involving digital voice matters, including digital audio enhancement, voice identification, speech-to-text, and forensic video analysis. Whether the case calls for a testifying expert or a behind-the-scenes technical guru, Cahn Litigation Services has the experience required to locate the right expert for the job at hand.

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Digital Voice Expert Witness - Sample Bios

Please Note: All Cahn Litigation expert witness searches are customized to attorneys' precise specifications and preferences. Attorneys are encouraged to discuss search parameters with a Cahn search specialist.

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The below expert witness bios represent a small fraction of those Digital Voice experts known by Cahn Litigation Services. These bios are provided to give attorneys a sense of the Digital Voice landscape.


Expert Witness #230901

This expert is a Computer Scientist and Technology Consultant specializing in Telecommunications, Call Center applications, and Media Distribution. This expert brings many years of experience in a diverse set of technologies including CTI (computer telephony integration), digital voice processing, speech recognition and Natural Language processing. This expert has a deep understanding of protocols and has designed protocols for many different kinds of systems and has had some of them adopted by the American National Standards Institute (ANSI). This expert has been a consulting expert in approximately 50 matters, IPRs, and Patent Litigation cases including cases for Telecommunication and Speech Recognition providing infringement, invalidity, and deposition testimony. This expert has testified at hearings and at trial for about 10 cases.

Professional Experience

Designed and developed some of the earliest available low-bit-rate digital voice communication products for long haul networks. Work included voice models, input digitization, voice feature extraction, encoding and decoding and interfaces to packet network systems. Designed protocols for various communications devices such as data encryptors.

Manager of Embedded Systems Group. Responsible for designing, among other things, protocols for factory automation systems, including communications and networking devices to handle interfacing host computers to subsystems that used different protocols.

Technology consulting in the area of Call Centers, Telephony, Wireless communication, mobile applications, biometrics and user authentication implementing Speech Recognition.

Provide level 1 & 2 evaluation of Patent portfolios to determine strongest / most valuable patents and identify vendors/products that read on stronger patents. Patents were evaluated in: Telephony, VoIP, Wireless devices, speech recognition, and digital device interfaces.

Provided in-depth research services to inventors and Intellectual Property investors. Also consulted on the design of solutions with embedded voice recognition features in the consumer products space.

This expert has been involved in the study and application of Natural Language understanding and processing, especially related to voice to text conversion, knowledge discovery, fact extraction, summarization, language weighting and importance models, etc. This expert has developed suites of software for each of these areas.

Case Experience

Patent Litigation – Consulting expert with responsibility for leading a group of 10 code reviewers reviewing more than 56 gigabytes of source code over a period of 10 months. The source code was associated with servers and services, content distribution servers, content ingestion servers, security and protocols for media sharing and distribution frameworks and architectures of business systems. Also provided expert consultation to litigation team on system architectures, applications, devices, and services. Coordinated with the team leads reviewing source code on similar architectures for other device manufacturers.

Patent Litigation - Consulting expert on infringement and invalidity of patents relating to voice network functions and processing in VoIP networks including enterprise and residential networks.


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Expert Witness #218672

This expert holds a Ph.D. in electrical engineering and computer science and is a Professor in the School of Electrical and Computer Engineering at a technology institute. The creator of a start-up which develops image and video processing software for wireless and IP networking, this expert has been active in the areas of voice and audio processing for many years. This expert is a Fellow of the IEEE, and has received awards for contributions to electrical engineering. This expert has reviewed and analyzed software and hardware designs through source code analysis for pre/post-litigation phases. This expert leads several large technology research programs in the areas of multimedia, networking, telecommunications and wireless technologies and has authored or edited several books. This expert is a frequent consultant to the industry. This expert has served as an expert witness and consultant in several leading intellectual property and patent litigation cases (both ITC 337 proceedings and Federal Circuit), and has been engaged as a litigation expert of graphics processing systems and components. This expert has testified at ten trials and was deposed over forty times.


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Expert Witness #218338

This expert holds a Ph.D. in Computer Science and is a Professor in the Department of Computer Science at a major university. This expert's current research interests are at the intersection of databases and artificial intelligence, including optimization. This expert has a great deal of expertise in the dialog systems component that models the series of voice interfaces, facilitating occurring interactions. Voice dialogs form one of many mechanisms through which a user can interact with interactive multimedia presentation systems (IMPS), and over the years, this expert has worked extensively with IMPS and written several papers on this subject. This expert is author of one of the best known books on multimedia databases, as well as one on advanced databases, a key component to all dialog systems. This expert is the named inventor of a patent pertaining to mining user interactions. In addition, this expert has worked extensively in the general area of data mining for a wide variety of human behavior modeling. As an expert witness, this expert has experience with both invalidity and infringement issues, has written associated reports and has served as a technical expert in front of the USPTO.


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Expert Witness #209093

This expert brings many years of experience in Computer Science, eCommerce, and Telecommunications. This expert specializes in Natural Language Speech Recognition, with transcription and bi-directional translation, speech recognition servers using standardized speech and command protocols. This expert performed multiple code reviews on Android and IOS Operating system and mobile applications. This expert has been a testifying expert for over 60 cases, IPRs, and Patent Litigation cases including Telecommunication and Speech Recognition providing infringement, invalidity, deposition and trial testimony. This includes testifying in a patent suit for a mobile transaction authorization system using biometric/voice authentication where the judge found for this expert’s client and cited this expert on all points of contention in the case.

Professional Experience

Designed and developed early CTIs (Computer Telephony Interfaces) that implemented early speech recognition.

Designed and Implemented Call Center systems with Voice Recognition using Speech Recognition servers using standard speech protocols and command interfaces. Systems developed include multi-platform support for natural language, command based, and menu-based speech recognition.

Designed and developed Contact Center system including implementation of Natural Language speech recognition using targeted phrase recognition, speech transcription, and industry specific speech applications.

Technology consulting in the area of mobile applications and mobile speech capture for local and remote speech recognition and authentication.

Case Experience

Patent litigation – Testifying expert on speech transcription and bi-directional translation systems for the deaf and hearing impaired, using both local and remote speech recognition using standard and mobile phone communications.

PTAB IPRs

Testifying expert for Call Center IVRs for correctional institutions providing speaker recognition, speaker identification, and automated conversation monitoring to provide visual markers and tags for identifying and reviewing targeted speech segments.

Patent litigation – Testifying expert on audio/speech sampling via mobile microphone and standard protocol transmission of speech samples Includes compressing of audio signals for thumb-print transmission for automatic content recognition (ACR systems). Android code review.

Patent Litigation
Testifying expert in Natural Language command parsing and recognition. System converted voice commands into a Command Line Interface using XML command and parameter sequences.

Patent Litigation for defendant. Provided expertise in telephony-based speech recognition, structured speech input, and call relay to operator assisted speech to text translation using ‘whisper mode’.


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Expert Witness #256632

This expert is a world-renowned researcher who has extensive research, technical, managerial, and Intellectual Property/patent expertise in the areas of telecommunications, networking, broadband, MetroEthernet, SONET/SDH/OTN Internet, VoIP, wireless, video, multimedia, MPLS, IPv6, e-commerce, and IoT/M2M for both carrier networks and enterprise networks. This expert's specialties include analysis, design, implementation, operation, and advocacy of new network technologies, particularly with an emphasis on packet technologies and the Internet Protocol (IP) for traditional and broadband applications such as:

Voice over IP (VoIP); Video Over IP (e.g., IPTV, specifically, entertainment quality digital TV, video distribution over satellite/DTH, High Throughput Satellites [HTSs], multimedia; wireless connectivity (including Wi-Fi, wireless sensor networks, and communication/DTH/HTS satellites); security; intranet; Internet/intranet architecture and QoS; IoT/M2M; LANs/VLANs/MetroEthernet; and the underlying high-capacity network infrastructure to support these applications along with the call control signaling logic (SS7/Q.931/Q.2931/Q.933) and Advanced Intelligent Network (AIN) services. Packet systems include X.25/NCP, IPv4, Frame Relay (FR), Asynchronous Transfer Mode (ATM), MultiProtocol Label Switching (MPLS), and IPv6. This expert has also done work in cloud services (Cisco UCS) and IoT/M2M, Smart Cities, Smart Buildings, Smart Grid, and e-health.

This expert has many years of hands-on ATM/SONET/MetroEthernet/OTN experience. In addition to numerous papers and conference presentations, this expert has written several books on LANs/VLANs/MetroEthernet, MPLS, Internet Services Cloud services, and IoT/M2M.

This expert has over 200 published patents as well as 35 patent applications cite this expert's work. Additionally, 5000+ academic researchers cite this expert's work in their publications, according to Google Scholar. This expert has taught IT and Telecommunications courses. This expert has appeared in industry conferences as well a radio and TV technology programs.

This expert has been called upon to undertake infringement/non-infringement analysis (with resulting depositions and testimony) in the area of packet video/IPTV, packet voice/VoIP, imaging (scanned checks), IoT, and wireless.


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Expert Witness #258365

This expert is a Ph.D. Candidate and has deep experience as an expert witness in Multimedia Networking, Communication Systems, Graphical User Interface, Signal Processing and other related topics. This expert's focus is in the design and development of a broad range of technologies in software and hardware for applications in telecommunications and multimedia networking. This expert possesses expertise in digital video and voice communications systems over packet-based wireless and wireline computer networks. This expert has been a technical expert for intellectual property litigations, supporting the nation's top law firms for patent or copyright infringement.  


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Expert Witness #261795

This expert is a Professor Emeritus of Digital Signal Processing. This expert received S.B. (Bachelor's), S.M. (Master's), E.E. (Professional Engineer's), and Sc.D. (Doctorate) degrees, all in Electrical Engineering and Computer Science. During graduate work, this expert was supported by a fellowship for research in hearing prostheses, and corporate sponsorship for the development of real- time automatic speech recognition systems. This expert is a member of the Acoustical Society of America, and is a Fellow of the Institute of Electrical and Electronics Engineers (IEEE). This expert has been a member of the IEEE Speech Technical Committee. This expert is also founder and director a speech technology company. This expert's current research interests involve digital processing of speech signals. This is concerned with such problems as the application of digital speech technology to sensory aids for the hearing impaired and automatic recognition of speech in adverse conditions. Some of the interesting problems arising from these applications include enhancement of speech in noise, formulation of robust perceptual distance measures, and real-time implementation. This expert also does work in efficient coding of speech signals, auditory modeling for improved speech analysis, speech production modeling, general digital signal processing, and pattern recognition.

-  This expert has been working in the field of computer processing of speech for many years and been an active consultant, inventor, entrepreneur, and teacher.
-  This expert started work on speech-to-text on with a startup.
-  This expert actively worked on speech-to-text commercially as a consultant, developing automated dictation transcription technology.
-  This expert founded a speech technology company that provided high-speed automated indexing and searching of voice. One product that was developed automatically aligned closed captioning with audio.
-  This expert was actively engaged in research focused on speech-to-text.
-  This expert is a named inventor on ten granted US patents all dealing with speech processing.
-  This expert has published nearly 200 peer reviewed articles, primarily concerned with speech processing.

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