SOLUTIONS FOR FORENSIC AUDIO LABORATORIES
- Forensic Speaker Identification
- Authenticity Analysis
- Professional Expert Training
ACU-EXPERT - Complete Forensic Audio Laboratory
FEATURES
SPEAKER VOICE IDENTIFICATION in-depth forensic audio analysis, investigating the recordings for equity of people.
AUTHENTICITY ANALYSIS investigation of tampering/editing or verification of recorded media. Recording device identification and verification.
SPEECH NORMALIZATION and PRE-PROCESSING investigation of speech suitability for identification purposes, speaker separation, audio normalization and speech enhancement.
TEXT DECODING creating the environment to retrieve the contents of poor quality recorded conversations, such as investigation of ‘black boxes’, telephone, radio and other evidences.
REPORTING preparing detailed expert reports to be used for legal evidence.
ADVANTAGES
- Exceptionally in-depth and detailed set of analysis tools such as speaker formant analysis (waveforms, spectrograms, LPC-spectrograms, and cepstrograms).
- Easy-to-use yet comprehensive speech analysis windows (energy, pitch, formants, user marks and notes overlay).
- Instant switching between modes and windows. Changing frame type and size, performing spectrum normalization on-the-fly.
- Fast calculations and convenient file management.
- Manually redraw, linear and non-linear transformations.
- Rich colour presets pallet. Full image export with user presets.
- Numerous signal editing tools and wide range of supported audio formats.
BENEFITS
- FORENSIC SPEAKER IDENTIFICATION with fast and accurate in-depth speech visualisation at Forensic level.
- RECORDING AND PLAYBACK for easy audio organisation: project organisation of files and wide range of supported audio formats, I/O level control, clipping notification, easy editing and various playback modes, pseudo stereo mode, tempo correction.
- FORENSIC SPEAKER ANALYSIS delivers automatic extraction of speaker characteristics, extraction of pitch and formant traces, manual correction options via visual control, calculation, comparison, and storing of pitch and formants statistics, flexible MS Word export.
- TEXT DECODING is supported by comprehensive text editor, featuring: highlighting of speakers’ utterances, convenient speech segmentation, text-to-audio binding and fast text navigation, automatic search of matching words and phrases for further comparison analysis.
- EDITING options features high-pass, low-pass, band-pass, inverse and other filtering options.
- AUTHENTICITY ANALYSIS provided with an additional module delivers excellent tools for equipment or recording authentication.
ACU-EXPERT Forensic Audio Analysis solution provides single multitasking environment to solve every forensic audio task at the highest professional level.
APPLICATIONS
Ideal for Forensic Audio Laboratories for in-depth forensic audio analysis and speech signal processing.
COMPRISING MODULES:
ACU-EXPERT comprises of various elements depending on the requirements and the task of the forensic audio laboratories:
OT Speech Investigation Environment
Audio processing environment designed to meet the needs of forensic audio experts dealing with speaker voice identification and speech analysis.
TD Authenticity Analysis Set
A set of instruments for precise and accurate audio authenticity analysis helping an expert to reveal original audio formats and detect falsification of audio evidence.
HEX Forensic analysis of media file structure
Forensic analysis of media file structure revealing editing or manipulation by frame mapping and detection of specific digital processing features.
AUDIO FORENSICS TRAINING
An integral part of the solution is a comprehensive training. Our experts have extensive experience and give practical training based on the current demands of Forensic Departments.
SVID - Speaker Voice IDentification solution for Forensic Experts
Speaker Voice IDentification solution is specially designed for the purpose of forensic speaker voice identification including tools for all contemporary approaches to the task of:
- Automatic speaker recognition technologies
- Extraction and comparison of linguistic features
- Detailed speech analysis based on acoustic speech production theory
The solution consists of two parts: ACU-ASR for automatic comparison based on voice biometrics and automatic speaker gender and language identification and ACU-EXPERT option OT – software application for accurate speech marking, text decoding, voice and speech features automated extraction and comparison.
SVID solution covers full range of existing methods of forensic speaker voice identification and allows to guarantee experts' confidence and conclusions.
FEATURES
EXPERT FORENSIC AND AUTOMATIC PRE-FORENSIC SPEAKER ID
- 1:1 speaker comparison in accordance with ENFSI guidelines and with with unlimited number of voiceprint extractions;
- 1:N speaker identification for more complex cases, with unlimited number of voiceprint extractions;
AUTOMATIC SEGMENTATION of speakers in two or three persons dialogue to extract one speaker from the flow.
EXTENSIVE FORMAT SUPPORT - All audio and majority of video file formats supported (with simultaneous video playback), precise audio re sampling.
TEXT DECODING AND PHRASE MARKING for conduction of by-word content of the conversation.
PHONEME RECOGNISER searching and visualization of the same phoneme type sequences across audio files;
SPEAKER DATABASE WITH CUSTOMIZED DATABASE RECORD PROFILE for proper reference population collection and audio storing.
ASSESSMENT OF SUITABILITY for automatic comparison and expert investigation with speech quality parameters export.
AUTOMATIC PITCH EXTRACTION with pitch distribution comparison and speech melodic patterns comparison.
FORMANT EXTRACTION and analysis of formants statistics in vowels.
AUTOMATED SEARCH of matching words and phonemes for detailed comparison.
REPORT PREPARATION for court testimony.
COMPRISING MODULES:
OT Speech Investigation Environment
Audio processing environment designed to meet the needs of forensic audio experts dealing with speaker voice identification and speech analysis.
ACU-ASR Automatic Pre-Forensic Speaker Recognition
Voice biometric software designed to provide forensic examiners and investigators with the ability to accurately match an individual’s identity with content captured through any type of audio channel.
FAV - Forensic Authenticity Validation solution for Forensic Experts
Forensic Authenticity Validation solution is focused on audio originality that becomes most important while representing evidence in process. Most of the methods were developed due to real cases practice and are probed on constructed and real examples.
We provide unique, powerful and complete set of tools dedicated to audio authenticity verification. Critical listening and features that are established from linguistic analysis are complemented with acoustic features investigation and media file structure analysis.
FEATURES
SIGNAL ANALYSIS including time domain and frequency domain investigation.
RELIABILITY AND REPEATABILITY OF THE RESULTS.
EXTENSIVE FORMAT SUPPORT - All audio and majority of video formats supported.
WIDE RANGE of user interface tools.
FAST CALCULATIONS and file management.
UNIQUE TECHNOLOGY of previous processing by MP3, WMA, AAC and OGG audio codecs with detection of exact parameters.
MEDIA FILE STRUCTURE accurate parsing with specific audio recorders traces highlighting. Check for file format match.
UNIQUE TECHNOLOGY of codec frame features detection – frame allocation map for the means of audio recording device identification and audio file source verification.
EXTRACTION AND REPRESENTATION OF FILE METATADATA including pictures, GPS, software signature.
REPORT PREPARATION for court testimony.
COMPRISING MODULES:
OT Speech Investigation Environment
Audio processing environment designed to meet the needs of forensic audio experts dealing with speaker voice identification and speech analysis.
TD Authenticity Analysis Set
A set of instruments for precise and accurate audio authenticity analysis helping an expert to reveal original audio formats and detect falsification of audio evidence.
ADDITIONALY AVAILABLE:
FAT Investigation Environment
Software module for investigation of audio-video recording devices. Memory analysis of digital recorders, FAT system analysis.
ENF Electrical Network Frequency analysis.
Investigation of recording integrity and detection of actual recording time by Electrical Network Frequency analysis.
Expert Forensic Audio Training Services
We provide a variety of training courses in audio forensics:
- Forensic Speaker Voice Identification
- Automatic Speaker Recognition for Forensic Applications
- Digital Audio Evidence Authenticity Analysis
- Speech Enhancement and Noise Reduction.
ADVANTAGE: Particular training program is submitted to Customer for approval and depend on students’ professional level.
How to learn about contemporary forensic audio investigation methods?
The training courses are included into solution proposal. Forensic audio examination training is given by professional experts and University lecturers with more than 10 years of real case experience investigations.
Students obtain deep understanding of speech production acoustics and get stable operating skills and practical techniques of forensic audio analysis.
Training qualification have been approved in more than a hundred training courses on forensic audio held in different countries worldwide (USA, Germany, Italy, Turkey, Morocco, Hungary, Serbia, Latvia, Georgia, Russia, Saudi Arabia, Pakistan, India, China, Mexico and South America, etc.)