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- Pilot Design in FDD massive MIMO
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- Voice and Data Communications | VOCAL Technologies
- About VOCAL Technologies
- Acronyms and Abbreviations
- Analog Telephone Adapter (ATA) Reference Design
- ATA Reference Design Applications
- VPBX Home Gateway Design
- ATA 2x1x1 Development Board
- ATA 2×2+1 Development Board
- ATA 1x1x1 Development Board
- ATA 3×2+1 Development Board
- ATA 8x1x1 Development Board
- ATA Design Features
- ATA Compatibility and Interoperability
- ATA Reference Design Components
- ATA Provisioning
- ATA Reference Design Specifications
- VPBX Home Gateway Reference Design
- Home PBX Extension Device
- VPBX Home Gateway Design Features
- VPBX Home Gateway Design Specifications
- Video PBX Design Features
- Video PBX Reference Design
- Video PBX Design Specifications
- Audio Examples
- Beamforming
- Acoustic Beamformer
- Acoustic Beamformer Design
- Acoustic Beamforming Algorithms
- Acoustic Beamforming with Microphone Array
- Acoustic echo cancellation with the LMS algorithm
- Acoustic echo cancellation with the ML algorithm
- Acoustic echo cancellation with the NLMS algorithm
- Acoustic Multiple-Channel Crosstalk Canceller
- Acoustic source localization using circular array microphones
- Acoustic Two-Channel Crosstalk Canceller
- Adaptive Beam Steering
- Adaptive Beamformer with Poles and Zeros
- Adaptive Beamforming using MUSIC Pseudo-Spectrum
- Adaptive Null Steering
- Baseband Frequency Locking for Distributed Transmit Beamforming
- Beamforming Techniques
- Beamforming white noise gain
- Beamsteering in Broadband Beamformers
- Blind source separation using DUET-like algorithm
- Broadband Constrained Minimum Variance Beamformer
- Broadband Multiple Linear Point Constraint Design
- BSS for a single desired speech source
- BSS for an under-determined system
- BSS performance measures
- Centered circular array direction of arrival estimation using least squares
- Circular Microphone Array
- Coherence based interference cancellation through region of arrival
- Compressed sensing approach to blind source separation of far field sources
- Consensus Based Synchronization For Distributed Transmit Beamforming
- Constant Beamwidth Frequency Domain Broadband Beamformer
- Differential Microphone Arrays
- Differential nullforming with uniform circular array
- Direction of arrival using uniform circular array microphones
- Directional beamforming using two microphones
- Directional Of Arrival Estimation In Beamforming
- Distributed Transmit Beamforming
- Double-talk detection based on orthogonality principle
- Effective filter for circular array microphones
- Effective filter for diamond array microphones
- Effects of separation distance on endfire microphone array beamforming
- Efficient distortionless response for conferencing
- Endfire microphone array beamforming
- Endfire microphone array beamforming with small beamwidth
- Energy based algorithm for cross-talk detection
- ESPRIT Algorithm- The Son of MUSIC
- Exact, elegant coherence based sub-band angle of arrival estimation for broadband acoustic signals
- Far Field Direction Of Arrival Estimation
- Far field direction of sound source estimate using circular array microphones
- Far-field Sound Pickup and Beamforming
- Fast And Efficient GCC Algorithm For Speech Angle Of Arrival Detection
- Fast beamformer with fixed direction for circular array microphones
- Fast beamforming with four microphones for ASR engines
- Fast, efficient and finite set SRP-PHAT angle of arrival estimation for beamforming
- Fault detection in microphone arrays for speech enhancement
- First order adaptive differential microphone array beamforming
- First order differential microphone array beamforming
- First order endfire beamformer directional noise SNR improvements
- First order endfire beamformer uncorrelated noise SNR improvements
- Frequency Domain Beamforming
- Frost Beamformer
- Full circle direction of arrival estimation for RTOS using least squares
- Full plane least squares acoustic sound source localization
- Fundamental Limits On Angle Of Arrival Estimation Error For Acoustic Microphone Array
- Generalized Sidelobe Canceler (GSC)
- Griffiths-Jim Beamformer for Noise Reduction
- Gunshot detection and localization
- Half plane least squares acoustic sound source localization
- High resolution far field direction of arrival using three microphones
- How can beamforming create power?
- Implementation Issues with Subspace Based Estimation Algorithms
- Implementing MUSIC Algorithm
- Linear Array Beamforming
- Linear Constrained Minimum Variance (LCMV) Beamforming
- Link Quality Indicators for Detection of Interfering Signals
- LMS implementation of first order adaptive differential microphone array beamforming
- Microphone Array Beamforming
- Microphone Array Beamforming
- Microphone Array Technologies
- Minimum Variance Distortionless Response (MVDR) Beamformer
- Minimum Variance Distortionless Response Beamformer Software
- Minimum Variance Distortionless Response(MVDR) Beamforming
- Mixing matrix estimation for blind source separation of far field sources
- Multi Mic Audio Signal Processing
- MUSIC (Multiple Signal Classification) Algorithm
- MVDR based two microphone beamforming with given desired signal direction
- Near Field Acoustic Beamforming
- Near Field Adaptive Beamforming
- Near field direction of sound source estimate using circular array microphones
- Non-aliased TDOA angle of arrival estimation
- Non-uniform Sampling with Microphone Array
- Nth order endfire beamformer
- Null-formed Beamforming for Improved Echo Return Loss
- Out of band energy level based algorithm for cross-talk detection
- Robust fixed point beamforming
- Root-MUSIC based sub-band angle of arrival estimation for broadband acoustic signals
- Scalable Distributed Transmit Nullforming
- Scalable Joint Distributed Transmit Beamforming And Nullforming
- Second order adaptive differential microphone array beamforming
- Second order differential linear microphone array beamforming
- Second order differential non-linear microphone array beamforming
- Second order uniform circular array directional beamforming
- Sensitivity of ULA direction of arrival estimates using GCC like algorithms
- Signal to noise ratio estimation with two microphones
- Single directionless filter for circular array sum and filter beamformer
- Single microphone speech enhancement based on apriori signal to noise ratio
- Small beamwidth endfire beamforming
- Sound Source Localization
- source to distortion ratio as a measure of BSS performance
- Spectral subtraction of acoustic noise
- Statistical optimal beamformers with steering vector mismatch
- Statistical optimal beamformers: generalized sidelobe canceler
- Statistical optimal beamformers: linearly constrained minimum variance beamformer
- Statistical optimal beamformers: Multiple sidelobe canceller
- Statistical optimal beamformers: reference signal beamformer
- Super directive beamforming with two microphones
- Two microphone beamforming for hearing aids
- Two microphone endfire beamformer signal to noise plus interferer improvements
- Two microphone source separation with spatial prior
- ULA directional noise SNR improvements with delay and sum beamformer
- ULA signal to noise plus interference ratio improvements with delay and sum beamformer
- ULA uncorrelated noise SNR improvements with delay and sum beamformer
- Uniform circular array directional noise SNR improvements with delay and sum beamformer
- Uniform circular array uncorrelated noise SNR improvements with delay and sum beamformer
- Variable descent step size for AEC
- Far field monitoring with microphone arrays
- Acoustic Beamforming Software
- Beamforming for Low Probability of Intercept
- Sound Propagation Models for Beamforming
- Beamforming Algorithms for Ultrasonic Imaging
- User Selection for Multiple Antenna Broadcast Channel
- Beamforming combined with AEC and Noise Suppression
- Wireless Beamforming Techniques
- Beamforming in Wireless Sensor Networks
- Exploiting Spacial Diversity in Single Antenna Systems using Cooperative Communications
- Blind Signal Separation (BSS)
- Blind Source Separation
- Blind Source Separation for Noise Reduction in Mobile
- Blind Source Separation: High Order Statistics Approach
- Correlation Techniques
- Data Modeling
- Deep Learning Based Voice-Activity-Detection (DLVAD)
- Generation of Mixing Functions for BSS and Beamforming
- Hearing: Cocktail Party Problem
- ICA: Independent Component Analysis
- Maximum-Likelihood (ML) Algorithm
- PCA: Principal Component Analysis
- Speech Separation with Microphone Arrays
- Time Delay Estimation
- Undetermined Blind Signal Separation
- Block Diagrams
- Compressed Sensing
- Recovery of Audio Signals with Compressed Sensing
- Adaptive Parity Error Detection for Compressive Imaging
- Background Subtraction using Compressed Sensing
- Interference Cancellation in Compressed Sensed Signals
- Overview of Encryption of Compressed Sensed Images
- Terahertz Imaging for Security using Compressed Sensing
- Enhanced Security Based on Under-Determination in Compressed Sensing
- Error Correction Using Compressed Sensing Techniques
- Gradient Projection Reconstruction of Compressed Sensing Signals
- Compressed Sensing of Images
- Compressed Sensing in Secure JPEG2000 (JPSEC)
- Compressed Sensing for Error Protection in JPWL
- Multipath Channel Estimation with Compressed Sensing
- Noise Resiliency with Compressed Sensing
- Secrecy of Cryptography With Compressed Sensing (CS)
- Single Pixel Camera
- Contact Us
- Cryptography
- Public Key and Secret Key Cryptography
- Steganography
- Advanced Encryption Standard (AES)
- Camellia
- CAST-128 and CAST-256
- CCM
- Data Encryption Standard (DES)
- DSA – Digital Signature Algorithm
- ECDSA – Elliptic Curve Digital Signature Algorithm
- Encryption
- GCM and GMAC authenticated encryption algorithms
- HMAC
- Keywrap algorithms – AESKW, AKW1, AKW2, TDKW
- Rabin Digital Signature Algorithm
- RC4 Encryption Algorithm
- RIPEMD
- RSA
- RSA User Authentication
- RSA Key Size Selection
- Theory of RSA
- SEED
- SHA-1 and SHA-2 (SHA-224, SHA-256, SHA-384, SHA-512) Hashing Algorithm
- Triple Data Encryption Standard (Triple-DES)
- Whirlpool
- Data Modem
- 56K Modem Software
- Data Modulation Software
- Data Protocol Software
- Command Set Controller Software
- V.22bis / V.22 / Bell 212 / V.23 / V.21 / Bell 103 Modem Software
- V.32bis and V.32 Modem Software
- V.34 Modem Software
- V.42 / V.42bis Software
- V.44 Data Compression Software
- V.90 Modem Software
- V.91 Modem Software
- V.92 Modem Software
- V.92 Modem-on-Hold, PCM upstream and Quick Connect Features
- Datasheets
- Dereverberation
- Comb Filtering in Acoustics
- Controlling RT60 – Practical Notes
- Critical Distance
- Critical Distance and RT60
- Early Reflections
- Frequency domain single channel blind dereverberation
- Information theoretic approach to single channel dereverberation
- Methods of RT60 Estimation
- Minimum Phase LTI Systems in Context of Equalization
- Practice of RT60 Estimation in Bands
- Room Reflections
- Speech Dereverberation using Channel Inversion and Equalization
- Various Models of Room Reverberation
- Voice Activity Detection for Dereverberation
- Speech Reverberation
- Room Impulse Response
- Dereverberation and Adaptive Beamforming
- Dereverberation using Spectral Subtraction
- Reverberation Cancellation Versus Suppression
- Octave Banks for Acoustic Filtering
- Echo Cancellation
- A and C Weighting via Bilinear Transform
- Acoustic Echo Cancellation (AEC) Barge-In
- Acoustic Echo Cancellation (AEC) for Sparse Echo Paths
- Acoustic Echo Cancellation for Wireless Devices
- Acoustic Echo Canceller
- Acoustic Echo Paths Characteristics and AEC
- Acoustic Echoes in Mobile
- Acoustic Feedback
- Acoustic Feedback Cancellation and Suppression
- Adaptive Acoustic Echo Cancellation
- Adaptive Filter Algorithm Stability
- Adaptive Impulse Response Estimation Algorithms
- AEC and NR Combined using Single Channel Data
- Aligning Audio Streams Captured using Unsynchronized Clocks
- Comfort Noise Generation in Echo Cancellers
- Convergence Speed Optimization for Normalized Least Mean Square (NLMS) Algorithm
- Critically Sampled Uniform Sub-Band Echo Cancellation using LMS-type Algorithms
- Delay Tracking for Voice over Packet Switched Network
- Digital Network Echo Canceller Software
- Double Talk Detection Using Cross Correlation
- Double Talk Detection Using Speech Features
- Double-Talk Detection in Echo Cancellation
- Dynamic Time Warping
- Echo Cancellation based on Adaptive IIR Filtering
- Echo in Voice over IP Networks
- Echo Path Delay Identification Offline
- Echo Paths for Hands-Free Terminals
- Efficient Fullband and Wideband AEC Implementations
- Energy and Level Estimation for G.168 Testing
- Equalization For ETSI-Compliant Audio Facility
- Estimating ERL from AF FIR Taps
- ETSI Audio Room Equalization – Selected Details
- Far-end Echo Delay Estimation with the Presence of Near-end Echo
- Far-End Line Echo Canceller
- Feedback Mitigation – Frequency Suppression
- Feedback Mitigation – Phase Modulation
- FIR Filter Design
- Fixed Point Mathematics for Acoustic Echo Cancellation
- Frequency domain acoustic echo cancellation
- G.167 Acoustic Echo Canceller
- G.168 Defined Echo Path Models
- G.168 Test Methodology
- Gammachirp Filter for Acoustic Echo Cancellation (AEC)
- Haar Wavelet Decomposition in Acoustic Echo Cancellation (AEC)
- Hidden Markov Models for Acoustic Echo Cancellation (AEC)
- High-Pass Filters in Echo Cancellers
- Impulse Response Estimation for Audio via Complementary Sequences
- In-Car Communication (ICC): Delay-Critical Applications
- Kalman Filter in Acoustic Echo Cancellation (AEC)
- Level Measurements via ITU P56 and Weighting
- Line & Acoustic Echo Canceller Combined
- Line / Network Echo Canceller
- Line and Acoustic Echo Diagnostics
- Line Echo Canceller with Backup FIR Filter
- Line Echo Canceller with Bulk Delay Compensation
- Linear Phase Filters in Acoustic Echo Cancellation
- Multi-Channel Acoustic Feedback/Echo Cancellation
- Multi-Channel Acoustic Feedback/Echo Cancellation
- Network Delays and Line / Network Echo Canceller Provisioning
- Non-Linear AEC
- Non-Linear Processing in Echo Cancellation
- Nonlinear Acoustic Echo Cancellation
- Potential Instability of NE/FE System with Echo Cancellation
- Potential Instability of NE/FE System without Echo Cancellation
- Proportionate Normalized Least Mean Squares Adaptation
- Psychoacoustic Echo Cancellation
- Residual echo suppression
- Signal De-Correlation
- Sparse Echo Cancellers
- Spatial Sampling and Aliasing with Microphone Array
- Stability Control by Echo Canceller
- Stereo Acoustic Echo Canceller (AEC)
- Stereo and Surround Sound Acoustic Feedback/Echo Cancellation
- Stereo and Surround Sound Acoustic Feedback/Echo Cancellation
- Stereophonic Acoustic Echo Cancellation
- Sub-Band Acoustic Echo Cancellation
- Tandem Echo Cancellers
- The Multi-channel Acoustic Echo Cancellation Problem
- Tonal Input Suppression Problem
- Tone Detectors in Echo Cancellers
- Two microphone adaptive nullforming for vehicle environment
- Two microphone auditory sub band adaptive nullforming
- Variable Tap Length Filters for Acoustic Echo Cancellation (AEC)
- Viterbi Algorithm in Speech Enhancement and HMM
- VoIP Echo Cancellation
- VoIP Echo Cancellation Software
- Volterra AEC
- Zero-Delay Feedback and Echo Cancellation
- Requirements for Acoustic Echo Cancellation and Noise Reduction
- The Combination of Adaptive Filters
- Acoustic Echo Cancellation (AEC) Software
- Two-Path Method for Acoustic Echo Cancellation
- Robust Adaptive Algorithms for Echo Cancellation
- Anti-howling
- Echo Cancellation in Cellular Networks
- Echo Control on Codec Parameters
- The Combined Reduction of Echo and Noise
- Acoustic Echo Cancellation (AEC) for Commercial Off-the-Shelf (COTS) Hardware
- The Affect of Convergence Speed in the Two-Path Method
- Cross-Correlations in Echo Cancellation
- Double-Talk Detection (DTD)
- Estimating Echo Return Loss and Echo Return Loss Enhancement
- Frequency Domain Adaptive Filtering in Echo Cancellation
- Frequency Offset Compensation in Echo Cancellation
- G.165 Echo Canceller Software
- G.168 Line Echo Canceller Software
- Handling of Nonlinearities in Echo Cancellation
- Echo Cancellation in IP Networks
- Multichannel Acoustic Echo Cancellation
- Non-conventional Applications of Acoustic Echo Cancellation (AEC)
- The Perception of Echo
- Post Filtering for Residual Echo Control
- Statistical Joint Control of Acoustic Echo Canceller and Post-Filter
- Subband Adaptive Filtering
- Variable Step-size and Regularization Parameters for NLMS
- Wideband Acoustic Echo Cancellation
- Engineering Services
- Forward Error Correction Algorithms
- Fax Modem
- Fax Demodulator and Fax Decoder
- Fax Monitoring and Diagnostics
- Fax Command Set Software
- Fax Modulation
- Fax Protocol Software
- T.30 Fax Software
- T.30-E Color Fax Software
- V.17 Fax Software
- V.21 Channel 2 Fax Software
- V.27ter Fax Software
- V.29 Fax Software
- V.34 Fax Software
- Secure Faxing with JPSEC
- Fax Monitoring and Recording
- Hardware Reference Designs
- Lawful Interception
- Networking
- IEEE 802.11
- IEEE 802.11e
- IEEE 802.11n
- 802.11 Authentication and Association
- 802.11 Distributed Coordination Function (DCF)
- Distortion Based Networking – Ad Hoc Wireless Routing
- Distortion Minimizing Rate Control for Wireless Multimedia Sensor Networks
- Datagram Transport Layer Security (DTLS)
- Dynamic Directional RTS/CTS
- ICE: Interactive Connectivity Establishment
- Internet Protocol Security (IPsec)
- IPsec for uClinux
- LANsEND Network Operating System
- Medium Access Control for Distortion Based Networking
- Multicast and Unicast Streaming Media
- TR-098
- Nat/Firewall Software
- TCP TURN
- Transport Layer Security (TLS) and Secure Socket Layer (SSL)
- Classic STUN: Simple Traversal of UDP Through NAT
- STUN Server in ICE Context
- TURN: Traversal Using Relay NAT Software
- Network Utility Maximization (NUM) for Resource Allocation
- Wireless Transport Layer Security (WTLS) Software
- Noise Reduction
- A Basic Voice-Activity-Detection (VAD)
- Active Noise Control
- Adaptive Noise Reduction
- Advanced Noise Reduction via HMM
- Forensic Speaker Recognition Preprocessor
- Iterative Spectrum Subtraction Noise Reduction
- Keyboard Click Removal
- Microphone Noise Reduction
- More on Observations Regarding Musical Noise
- Musical Noise in Acoustic Noise Reduction
- Noise Estimation: Dynamics v. Stationarity
- Noise Reduction Solutions
- Noise Reduction via Hidden Markov Model (HMM)
- Noise Reduction via Speech Modeling
- Noise Reduction: An Instructional Example
- Perceptual Noise Reduction for Voice Quality Enhancement
- Perceptual-Based Spectrum Subtraction Noise Reduction
- Real-Time Audio Filtering
- Single Channel Wind Noise Detection
- Sound Isolation for Noise Control in Communications
- Statistical Analysis of Random Signals
- Synthetic Noise for Voice Enhancement
- Synthetic Noise of Predefined Spectrum for Voice Enhancement
- The FFT: An Efficient Class of Algorithms
- The Simple Theory of Noise Reduction: Wiener Filtering
- Unifying Spectrum Subtraction with Wiener Filtering
- Using Noise Modeling for Speech Enhancement
- Using Statistical Models for Speech Enhancement
- Voice-Activity-Detection (VAD) Feature Set
- Wind Noise in Mobile Telecommunication
- Noise Reduction Using Minimum Mean Square Estimators (MMSE)
- Model-Based Speech Enhancement
- Monaural Speech Separation
- Noise Reduction of Non-stationary Noise Sources
- Single microphone active noise cancellation
- Single microphone active noise cancellation
- Two microphone active noise cancellation
- Voice activity detector in highly degraded environments
- Psychoacoustic Noise Suppression
- The Artifacts of Spectral Subtraction
- Particle Swarm Optimization
- Image Compression using Compressed Sensing (CS) and Particle Swarm Optimization (PSO)
- Motion Tracking using Particle Swarm Optimization
- Particle Swarm Optimization in the RWA Process for All-Optical WDM Networks
- Particle Swarm Optimization in Signal Separation
- Particle Swarm Optimization (PSO) in Speech Enhancement
- Adapting Particle Swarm Optimization (PSO) by Deciding on the State of Convergence
- Adaptive Particle Swarm Optimization (APSO)
- Time Delay of Arrival (TDOA) using Particle Swarm Optimization (PSO)
- Noise Reduction using SVD and PSO
- Particle Swarm Optimization in the Design of Adaptive FIR Filters
- Particle Swarm Optimization in the Design of Adaptive IIR Filters
- Particle Swarm Optimization in Acoustic Echo Cancellation (AEC)
- Adaptive Antenna Arrays using Particle Swarm Optimization
- Blind Signal Separation (BSS) using Particle Swarm Optimization (PSO)
- Particle Swarm Optimization on FPGA
- Gaussian Particle Swarm Optimization (GPSO)
- Particle Swarm Optimization in the Grassmannian Line Packing Problem for MIMO Beamforming
- Euclidean Particle Swarm Optimization (EPSO)
- Perceptual Filtering
- Press Releases
- Acoustic Echo Cancellation Plus Integrates Speech Enhancement, AGC and Echo Tail Search
- Dereverberation Brings the Far-End Speaker Up Close and Clear
- Enhanced TR-069 VoIP Stack Enables Dynamic Reconfiguration of Fax Lawful Interception Assets
- Enhanced VoIP Stack Design with Echo Cancellation for Crisp Clear Speech
- HD Video Reference Design Lowers Cost of Multi-Channel H.264 1080p Videoconferencing
- Teletics MoNet MoIP Gateway Implements VOCAL’s Enhanced Modem over IP Solution
- VOCAL and Tilgin Partner to Leverage TR-069 for Enhanced Customer Services
- VOCAL Announces HD Video MCU Reference Design for Multi-Channel HD Video Conferencing Solutions
- VOCAL’s Comprehensive Fax Diagnostics Troubleshoot Fax Transmission Issues
- VOCAL’s VoIP Software Stack Includes Android Optimized ITU, GSM and Wideband Vocoders
- VOCAL’s Multi-Channel Video Framework Unleashes Full Potential of DaVinci DM8168
- VOCAL Software Translates Video For 2.5G/3G Wireless Handsets
- VOCAL Software Enables WLAN Hardware Implementation
- VOCAL Technologies Unveils RAS Over IP™ Technology
- VOCAL Adds DSP Functionality to MIPS Technologies’ New 32-Bit Pro Series™ Cores
- VOCAL Turbo Codes Boost IEEE 802.11a, 802.11b and 802.11g Wireless LAN Performance
- VOCAL LDPC Codes Extend IEEE 802.11a, 802.11b and 802.11g Wireless LAN Range
- VOCAL quadruples battery life in IEEE 802.11a, 802.11b, and 802.11g Wireless LAN mobile units
- VOCAL Technologies Inks Accord With Agilent Technologies
- VOCAL offers build-to-suit IEEE 802.11a, 802.11b, and 802.11g Wireless LAN Solutions
- VOCAL Provides the Voice for Sorenson SVX Hybrid Chips
- VOCAL Technologies Provides Turnkey DSP Software Solution To InSciTek’s Allworx 10x Server
- New Adapters from VOCAL Technologies, Ltd. enhance VOIP service, accommodate more phones
- VOCAL Adds DSP Functionality to MIPS Technologies’ New 32-Bit Pro Series™ Cores
- VOCAL Introduces Optimal CTR-AES, CBC-MAC-AES, and CCMP-AES Encryption Cores for 802.11i
- VOCAL Provides Its AES-128 for DTCP Using Industry-Standard Microprocessors
- VOCAL Technologies selects SMSC as its ethernet silicon supplier for all ip interaction serving voice over IP market
- VOCAL Announces Single-Processor VoIP-Analog Telephone Adapter Based on TMS320C55x DSP from Texas Instruments
- New Internet PBX ATA (iPBX) and PBXtender Extends VoIP to Homes, Offices
- VOCAL Technologies, Ltd. Teams with SOC Technology GmbH & Co. KG for Production of VoIP Speaker Phone
- VOCAL Technologies Chooses Legerity VoicePort for Ultra Low Cost ATA
- Resources
- Secure Communication
- Frequency Scrambler and Frequency Inversion
- JPSEC Authentication Template
- EAPoL – Extensible Authentication Protocol over LAN
- JPSEC Decryption Template
- CCMP
- JPSEC Hash Template
- JPSEC Key Information Template
- JPSEC Registration Authority (RA)
- JPSEC Tools
- Cryptographic Message Syntax (CMS)
- Document Signature by Multiple Parties
- EAP – Extensible Authentication Protocol
- SDES
- EAP Types – Extensible Authentication Protocol Types information
- JPSEC: Secure JPEG2000
- Secure Application Configuration Access Protocol – ACAP over SSL/TLS
- EAPoW – Extensible Authentication Protocol over Wireless
- Secure Hypertext Transfer Protocol (S-HTTP)
- HTTPS: HTTP over SSL/TLS
- Wired Equivalent Privacy (WEP)
- Internet Key Exchange version 2 (IKEv2) Protocol
- Multimedia Internet Keying – MIKEY
- Secure Internet Message Access Protocol – IMAP over SSL/TLS
- Secure Simple Mail Transport Protocol – SMTP over SSL/TLS
- Secure/Multipurpose Internet Mail Extensions & S/MIME Software
- Wi-FI Protected Access (WPA)
- Assured Services Session Initiation Protocol (AS-SIP)
- Session Initiation Protocol SIP
- SIP Agents
- SIP Servers
- SIP Sessions
- SIP Trunking
- SIP User Authentication
- Session Initiation Protocol (SIP) and Deep Packet Inspection (DPI)
- SIP Conferencing
- SIP Call Forwarding
- Locating SIP Servers
- SIP Message Routing
- SIP PRACK
- SIP Instant Messaging
- SIP Presence
- SIP Registration
- Secure SIP
- SIP Session Timers
- SIP Call Transferring
- Software Modules
- Specialty Technologies
- Speech Compression and Speech Coder Software
- Audio Sample Rate Converter
- CVSD
- Fractional Resampling
- G.729 and Its Application in the Cellular Market
- Opus Audio Codec Solutions
- Vocoder Transcoding Software
- ITU Speech Coders
- GSM Speech Coders
- Wideband Speech Coders
- Other Speech Coders
- Packet Loss Concealment (PLC) in Vocoders
- PSQM, PSQM+ & Perceptual Scale
- Speech Codecs and Associated PSQM Values
- LPC-10 Codec
- MELP Codec
- How to Choose a Speech Coder?
- MELP Modifications to LPC-10
- MELPe Codec
- TSVCIS MELPe
- Stability of LPC Filters in Vocoders
- Wideband Energy Detection in Scalable Speech Coding
- Windowing in Vocoders to Remove Artifacts
- 218x Resource Requirements
- Allpass Filters in Vocoders
- Arithmetic Coding in Vocoders
- Efficient Implementation of LPC Analysis Filters
- Comfort Noise Generation in Vocoders
- Evaluating Speech Coders
- G.711 Codec
- G.722 Vocoder
- G.722.2 Adaptive Multi-Rate Wideband (AMR-WB)
- G.723.1 Codec
- G.726 Codec
- G.722.1 Codec
- G.728 Codec
- G.729 Codec
- G.729A Codec
- G.729.1 Codec
- G.729AB Codec
- GSM Adaptive Multi-Rate (AMR) Codec
- GSM Enhanced Full Rate (EFR) Codec
- GSM Half Rate (HR) Codec
- GSM Full Rate (FR) Codec
- iLBC (Internet Low Bitrate) Vocoder
- Opus Codec
- SILK Codec
- Speex Codec
- Speech Recognition
- Stochastic Resonance
- System Designs
- Analog over IP (AoIP) Gateway Reference Design
- Analog Telephone Recorder Reference Design
- DM8168 Video Software
- HD Video Reference Design
- Media Gateway Reference Design
- Remote Access Server over IP™ (RASoIP™)
- Remote Radio Monitoring
- RoIP Gateway
- Soft Radio Reference Design
- Space Application Development Board
- Space Application Development Board for Full Duplex Hands-Free Voice Communication Systems
- TR-069 Reference Design
- VoIP Gateway Reference Design
- VoIP Radio Reference Design
- VoIP Reference Design
- Resource Requirements
- DSP RISC and CISC Supported Platforms
- Supported Operating Systems
- Telephony Software
- Video
- AdaBoost Training Algorithm for Viola-Jones Object Detection
- Adaptive Bitrate Streaming
- Advanced Motion Adaptive Deinterlacer
- Advanced Motion Adaptive Directional Deinterlacer
- Analog TV Demodulation
- Analog TV Modulation
- Analog TV Standards
- ATSC Digital Terrestrial TV Modulator
- ATSC Digital Terrestrial TV Receiver
- ATSC Digital Terrestrial TV Transmitter
- Backend Video Processing
- Basic Directional Video Scaler
- Basic Motion Adaptive Deinterlacer
- Basic Motion Detector For Motion Adaptive Deinterlacer
- Basic Video Scaler
- Basic Video Sharpening
- Basic Video Sharpening with Controlled Granularity and Noise Coring
- Blocking Artifact Reduction
- Color Management
- Combined Video Scaler and Sharpener
- Correlation Noise in Wyner-Ziv Video Coding
- DCT Transform Digital Watermarking
- Deinterlacing
- Digital Video Broadcasting for Cable Systems DVB-C
- Digital Video Broadcasting for Satellite Systems DVB-S
- Digital Video Broadcasting for Terrestrial Systems DVB-T
- Digital Video Surveillance Security Cameras
- Digital Watermarking
- Digital Watermarking for H.264 Video Compression
- Distributed Video Coding (DVC)
- DVB-T Receiver
- Dynamic Adaptive Streaming of Video over HTTP (MPEG-DASH)
- Embedded Zerotree in Wavelet Image Compression
- Equalizer for ATSC Digital Terrestrial TV Receiver
- Estimation of Complex Signal Magnitude and Angle
- Face Detection using Viola-Jones Algorithm
- Flesh Tone Noise Reduction Correction
- FM Audio Demodulator
- H.264/AVC Interpolation in Interframe Prediction
- H.264/AVC Syntax
- H.264/AVC Transform
- H.264/AVC Video Decoder
- Hadamard Transform Digital Watermarking
- Histogram of Oriented Gradients (HOG) for Object Detection
- Human Detection and Tracking in Video Surveillance System
- Implementation of FIR using Downsampling
- Implementation of FIR with Steep Rolloff and High Level of Attenuation Stopband
- Impulse Noise immunity for AGC
- Impulse Noise in TV channels
- Interactive Video Technology
- Interframe Noise Reduction for Video
- Local Direction Detector
- Mobile Live Streaming
- Mobile Video-on-Demand
- Mosquito Noise Reduction
- Narrow Passband Spectrum Filtering by Downsampling and Trivial Rotation
- Noise Reduction using Combined Linear-Median Filter
- Noise Reduction using Spatial Level Control Filter
- OFDM Modulation
- Overshoot for Video Sharpening
- P2P Mesh-Based Live Video Streaming
- P2P Multi-Tree Based Live Video Streaming
- P2P Network
- P2P on Demand Mesh-Based Live Video Streaming
- P2P Single Tree Based Video Streaming
- P2P Video on Demand
- P2P Video Streaming
- Pixel-Domain Wyner-Ziv Coding
- Profiles and Levels in H.264/AVC
- Progressive Download
- QoE in 3GPP DASH
- Quality of Experience (QoE) for Streaming Video
- Remote Video Surveillance
- RGB and CMYK Color Space Conversion
- RGB and HSV/HSI/HSL Color Space Conversion
- RGB and YUV Color Space Conversion
- Ringing in Scaling
- Scalable Video Compression based on Wavelets
- Scalable Video Encoding
- Scale Invariant Feature Transform (SIFT) for Object Detection
- Security in P2P Video Streaming
- Spatial Domain Digital Watermarking
- Speed Capture in Video Surveillance
- Surveillance Video Coding with Background Preprocessing
- Transform-Domain Wyner-Ziv Coding
- User Adaptive Video Streaming
- Video Compression Technology
- Video Conferencing Technology
- Video description technology
- Video Processing Architecture
- Video Scaling
- Video Sharpening with Controlled Granularity
- Video Streaming Protocols RTP, RTCP and RTSP
- Video Streaming Technology
- Video Streaming to Mobile Devices
- Video Surveillance for Biometrics
- Video Surveillance Technology
- Video Vertical and Horizontal Sharpening with Diagonal Sharpening Control
- Wavelet Transform Digital Watermarking
- Video Codecs
- VP8 Video Codec
- JPEG
- ITU H.261
- ITU H.264
- ITU H.263
- JPEG 2000
- JPEG2000 Rate and Quality Scalability
- JPEG2000 and H.264 for Video Surveillance
- Wavelet Transform for Sparsity in JPEG2000
- JPEG2000 Image Transmission using JPIP
- Secure JPEG2000 (JPSEC) Images
- Wireless JPEG2000 Transmission and Unequal Error Protection using JPWL
- MJPEG
- MPEG-2
- MPEG-4
- Voice Processing
- Voice Quality Enhancement
- Adaptive voice activity detection using time domain zero crossings
- Amplitude modulation spectrum detection for speech
- Autoregressive model for speech processing in frequency domain
- Bandwidth Extension
- Classification Model Assessment and Validation for Voice Activity Detection
- Control Logic for Adaptive Noise Cancellation
- Dual Microphone Adaptive Noise Reduction Software
- Eigen space voice activity detector for multiple microphone array broadband acoustics
- Feedback controller design for audio AGC
- First order derivative to detect speech onset and offset
- First order digital equalizers
- Frame based maximum likelihood classification of speech and background noise
- Frequency modulation detection for speech
- Generalized solution to the minimum variance distortionless response of broadband audio
- Hilbert Transform in Signal Processing
- How to get reverberation out of a single microphone recording
- Howling detection based on LMS algorithm
- Low Latency Speech Enhancement In-Car Communication Systems
- Maximum likelihood classification of speech and background noise
- Maximum likelihood voice activity detector
- Noise Cancellation Microphones
- Noise Cancellation Microphones for Automatic Speech Recognition
- Non-linear Loudspeaker Microphone Enclosure Compensation
- Removing musical noise from denoised speech
- Second order digital equalizers
- Signal Detectors and Classifiers
- Signal Restoration in Frequency Domain via Prediction
- Speech Enhancement and Speech Intelligibility
- Speech pitch detection using modified average magnitude difference functions
- Speech pitch detection using the average magnitude difference function
- Speech pitch detection using the magnitude average product function
- Voice activity detection with adaptive thresholding
- Voice activity detection with long term spectral divergence
- Voice activity detection with spectral flux
- Voice Activity Detectors and Their Applications
- VoIP Stack Featuring Voice Quality Enhancement (VQE)
- Yule-Walker Algorithm and Method Used in Voice Enhancement
- Maintaining the Harmonic Structures for Speech Enhancement
- Voice Activity Detection (VAD) Software
- Battlefield VOX Software
- The Cause of Echoes in Coding
- Dual Channel Noise Estimation for Speech Enhancement
- Echo Reduction in Coding
- Error Concealment for Speech Transmission
- Measuring Speech Quality
- Standard Methods of VAD
- Speech Enhancement Software
- VoIP
- Analog Modem Adapter
- Codecs Used in Voice over IP Technologies
- Jitter Buffer for Voice over IP
- Mobile Voice over IP Technology
- Mobile Voice over IP Technology using H.323
- Mobile Voice over IP Technology using SIP
- Packet Loss Concealment
- Point of Sale Modem Support on VoIP Networks
- SIP Analog Modem Server (SAMS)
- SIP Analog Modem Server – Alarm Panels
- SIP Analog Modem Server – Modem as a Service (SAMS-MAAS)
- SIP Analog Modem Server for Facsimile (SAMS-F)
- SIP Analog Modem Solutions
- SIP Software Modem
- Transparent Data Modem Relay for Legacy Applications
- UAV VoIP Gateway
- V.150.1 Gateway
- V.151 Gateway
- V.152 Gateway
- Voice over IP Adapters (ATA)
- Voice over IP Packet Structure
- VoIP Technology
- MVoIP and Mobile VoIP Software
- Android VoIP SDK
- iOS VoIP SDK
- MGCP Communications Protocol
- Real-Time Transport Protocol (RTP)
- SDP
- Modem over IP
- Radio over IP (RoIP)
- Secure Real-time Transport Protocol (SRTP)
- Fax over IP (FoIP)
- T.38 Fax over IP
- T.38 Transmission Over SRTP
- T.38 Image Extraction from Captured Network Data
- Current Proposed Modifications to T.38
- T.38 Prioritization in a Universal Gateway
- Comparison of T.38 Transmission Over UDPTL or RTP
- Comparison of Facsimile Transmission over T.38 and V.152
- VoIP Vocoders
- Voice and Video over IP (V2oIP) Software
- WebRTC
- White Papers
- VOCAL Technologies Sitemap