Site Map
Home
Systems
Overview
VoIP Systems
V
2
oIP Systems
RoIP Systems
RASoIP Systems
Cryptographic Systems
Facsimile Lawful Interception
T.38 FoIP Lawful Interception
Hardware
ATAs
Home PBX
Video PBX
T.38 Fax Over IP
Platforms
Software
Overview
Modules
Services
Specialties
Overview
Beamforming
Error Coding
Cryptographic Systems
Facsimile Lawful Interception
T.38 FoIP Lawful Interception
Media Gateway
Resources
Overview
Block Diagrams
Datasheets
Developer
Patents
Current Research
White Papers
Company Info
About Us
Press Releases
Employment
Contact Us
VOCAL offers complete hardware design, firmware development, software and support. For more information regarding our products and services
click here
Technologies
VoIP Systems
V
2
oIP Systems
RoIP Systems
Speech Coders
Overview
ITU Speech Coders
GSM Speech Coders
Wideband Speech Coders
Other Speech Coders
Video Codecs
Overview
Still Picture
Motion Picture
Video Conference
Echo Cancellation
Overview
Acoustic Echo Canceller
G.165 Echo Canceller
G.168 Echo Canceller
Noise Reduction
Voice Quality Enhancement
Overview
Echo Cancellation
Noise Reduction
Speech & Audio Enhancement
Compressed Sensing
Blind Signal Separation
Beamforming
Overview
Acoustic
Wireless
Image
Audio Examples
Echo Cancellation
Noise Cancellation
Speech Coders
Wideband Speech Coders
Advanced Error Coding
Overview
Reed Solomon
Turbo Code
LDPC
Stochastic Resonance
Swarm Coding
Network
Security
Overview
Key Management
Communications
Information Security
Steganography
Cryptography
Overview
Encryption
Authentication
Key Handling
Other
Lawful Intercept
Deep Packet Inspection
Telephony
Overview
Analog Telephony
Digital Telephony
Speakerphone
Data Modems
Overview
Data Modulations
Data Protocols
Modem Command Sets
Fax Modems
Overview
Fax Modulations
Fax Protocols
Fax Command Sets
V.34 Fax
T.38 Fax Relay
Platforms
TI
C6000 (TMS320C62x, TMS320C64x, TMS320C645x, TMS320C67x, DaVinci)
OMAP
C5000 (TMS320C54x, TMS320C55x)
Analog Devices
Blackfin
ADSP-21xx
TigerSHARC
SHARC
PowerPC
Altera
AMCC
BAE Systems
Freescale
PowerQUICC Pro (83xx)
PowerQUICC III (85xx)
Samsung
STMicroelectronics
Xilinx
MIPS (MIPS32, MIPS64, MIPS4Kc)
Altera
Broadcom
IDT
Ikanos
LSI Logic
Motorola
ARM (ARM7, ARM9, ARM9E, ARM10E, ARM11, Cortex Series, SecureCore, StrongARM)
Atmel
Broadcom
NVIDIA
NEC
Toshiba
Freescale
STMicroelectronics
CEVA
Teak
TeakLite
Palm
Oak
Microchip
8-bit PIC
16-bit PIC
16-bit dsPIC
32-bit PIC
rfPIC
x86
AMD
Intel
Smart Phones
iPhone
Android
Black Berry
Ikanos
Fusiv 150/200
ARC
ARCtangent-A5
NXP Philips Trimedia
TM1000
TM1100
TM1300
VeriSilicon (formerly LSI Logic) ZSP
Operating Systems
Unix
Linux
uClinux
Microsoft Windows
Desktop
ACM
RTC
CE
Mobile
Symbian
Mac OS
BSD
VxWorks
Integrity
FPGA/PLD/ASIC Cores
Products
ATAs
Home PBX
HPNA Reference Design
Gateway
Extender
Video PBX
RASoIP Systems
Soft Radio
Facsimile Lawful Interception
T.38 FoIP Lawful Interception
Speakerphone
Data Modems
Fax Modems
T.38 Fax Gateway
V.34 Fax Terminal
Sitemap
Below is the site layout for the VOCAL Technologies website.
Systems
Overview
VoIP Systems
V
2
oIP Systems
RoIP Systems
RASoIP Systems
Cryptographic Systems
Facsimile Lawful Interception
T.38 FoIP Lawful Interception
Hardware
ATA
Features
Specifications
Reference Designs
Interoperability
Provisioning
1x1+1
2x1+1
2x2+1
3x2+1
8x1+1
HPNA Home PBX
Features
Specifications
VPBX Gateway Unit
VPBX Extension
Video PBX
Features
Specifications
FPGA/PLD/ASIC Cores
Advanced Encryption Standard (AES) IP Core
Counter with Cipher Block Chaining-Message Authentication Code (CCM) IP Core
T.38 Real-Time Fax Relay Over IP
Platforms
Operating Systems
Software
Overview
Modules
VoIP
Overview
V
2
oIP
MGCP
SIP
SDP
RTP
SRTP
T.38 Real-Time Fax Relay Over IP
Comparison of T.38 Transmission Over UDPTL or RTP
T.38 Transmission Over SRTP
Current Proposed Modifications to T.38
T.38 Prioritization in a Universal Gateway
T.38 Image Extraction from Captured Network Data
Comparison of Facsimile Transmission over T.38 and V.152
VoIP Vocoders
SIP
Overview
SIP Calling
SIP Conferencing
SIP Call Forwarding
SIP Call Transferring
Locating SIP Servers
SIP Message Routing
SIP PRACK
SIP Presence and Instant Messaging
SIP Registration
Secure SIP
SIP Session Timers
Voice Codecs
Overview
Efficient Implementation of LPC Analysis Filters
Wideband Energy Detection in Scalable Speech Coding
PSQM
PSQM Values
Resource Requirements
ITU Speech Coders
ITU
G.711
- 64k bps PCM (A-law or μ-law form)
ITU
G.722
- 7 kHz audio coding within 64 kbit/s (SB-ADPCM)
ITU
G.722.1
- 24k and 32k bps, 7 kHz audio
ITU
G.722.2
- Adaptive Multi-Rate Wideband (GSM AMR-WB)
ITU
G.723.1
- 5 1/3k and 6.4k bps ACELP/MP-MLQ
ITU
G.726
- 16k, 24k, 32k and 40k bps ADPCM
ITU
G.727
- 5, 4, 3 and 2-bits sample Embedded ADPCM
ITU
G.728
- 16k bps LD-CELP
ITU
G.729/G.729A
- 8k bps CS-ACELP
ITU
G.729 Annex B
- Silence Detection
GSM Speech Coders
GSM Full Rate
GSM Half Rate
GSM Enhanced Full Rate
GSM Adaptive Multi-Rate
GSM Adaptive Multi-Rate Wideband (G.722.2)
Other Speech Coders
iLBC
LPC-10
MELP
MELPe
Speex
Wideband Speech Coders
ITU
G.722
ITU
G.722.1
ITU
G.722.2 (GSM WB-AMR)
ITU
Speex
Evaluating Voice Coders
Audio Examples
Echo Cancellation
Noise Cancellation
Speech Coders
Wideband Speech Coders
Video Codecs
Overview
Still Picture
JPEG
JPEG2000
Wavelet Transform for Sparsity in JPEG2000
JPEG2000 Rate and Quality Scalability
Secure JPEG2000 (JPSEC) Images
Wireless JPEG2000 Transmission and Unequal Error Protection using JPWL
JPEG2000 Image Transmission using JPIP
Motion Picture
MJPEG
MPEG-2
MPEG-4
Video Conference
H.261
H.263
H.264
Echo Cancellation
Acoustic Echo Cancellers
Two-Path Method for Acoustic Echo Cancellation
The Affect of Convergence Speed in the Two-Path Method
Robust Adaptive Algorithms for Echo Cancellation
The Combination of Adaptive Filters
The Challenges of Stereophonic\Multichannel Echo Cancellation's
Subband Acoustic Echo Cancellation
Wideband Acoustic Echo Cancellation
Frequency Domain Adaptive Filtering in Echo Cancellation
Handling of Nonlinearities in Echo Cancellation
Double-Talk Detection in Echo Cancellation
Variable Step-size and Regularization Parameters for NLMS
Post Filtering for Residual Echo Control
The Perception of Echo
The Combined Reduction of Echo and Noise
Echo Control on Codec Parameters
Echo Cancellation in Cellular Networks
Estimating Echo Return Loss and Echo Return Loss Enhancement
Statistical Joint Control of Acoustic Echo Canceller and Post-Filter
Frequency Offset Compensation in Echo Cancellation
Echo Cancellation in IP Networks
Cross-Correlations in Echo Cancellation
G.165 Echo Cancellers
G.168 Echo Cancellers
Speech & Audio Enhancement
De-reverberation of Speech Signals
Scalable Audio Coding
Scalable Speech Coding
Error Concealment for Speech Transmission
Independent Component Analysis (ICA)-Based Speech Enhancement
Dual Channel Noise Estimation for Speech Enhancement
Speech Enhancement and Speech Intelligibility
Standard Methods of Voice Activity Detection (VAD)
Noise Reduction
Overview
Noise Reduction of Non-stationary Noise Sources
Monaural Speech Segregation
The Artifacts of Spectral Subtraction
Compressed Sensing
Recovery of Audio Signals with Compressed Sensing
Compressed Sensing of Images
Background Subtraction using Compressed Sensing
Noise Resiliency with Compressed Sensing
Interference Cancellation in Compressed Sensed Signals
Adaptive Parity Error Detection for Compressive Imaging
Multipath Channel Estimation with Compressed Sensing
Single Pixel Camera
Terahertz Imaging for Security using Compressed Sensing
Overview of Encryption of Compressed Sensed Images
Compressed Sensing in Secure JPEG2000 (JPSEC)
Secrecy of Cryptography With Compressed Sensing
Gradient Projection Reconstruction of Compressed Sensing Signals
Error Correction Using Compressed Sensing Techniques
Enhanced Security Based on Under-Determination in Compressed Sensing
Compressed Sensing for Error Protection in JPWL
Beamforming
Acoustic Beamforming
Beamforming for Voice Quality Enhancement
Microphone Array and Remote Capture Beamforming
Sound Capture Model for Beamforming
Microphone Array for Source Location
Microphone Array in Conference Environment
Speech Separation with Microphone Array
Beamforming Combined with Acoustic Echo Cancellation
Acoustic Beamforming in a Dispersive Environment
Direction of Arrival Estimation Algorithms in Array Signal Processing
Wireless Beamforming
Beamforming for Wireless MIMO Communications
Beamforming for Space Division Multiple Access
Beamforming for MIMO-OFDM with Limited Feedback
MIMO Techniques in 3GPP LTE
MIMO Techniques in WiMAX Networks
Joint Transceiver Beamforming Design for Multiuser MIMO Systems
Grassmannian Beamforming for MIMO Wireless Systems
Beamforming for Wireless Sensor Networks
Beamforming for Low Probability of Interception
Adaptive Modulation for 802.11n Beamforming Systems
Transmit Beamforming in 802.11n
Coordinated Linear Beamforming
User Selection for Multiple Antenna Broadcast Channel
Opportunistic Scheduling and Beamforming for MIMO-OFDMA
Transmit Beamforming Schemes for Time-Selective Fading Multi-antenna Systems
An Optimized Unitary Beamforming Technique for MIMO Broadcast Channels
Relay Beamforming Strategies for Physical-Layer Security
A Competitive Mean-Squared Error Approach to Beamforming
A Smart Antenna Receiver Array Using a Single RF Channel and Digital Beamforming
Exploiting Spacial Diversity in Single Antenna Systems using Cooperative Communications
Image Beamforming
Beamforming for Ultrasonic Imaging
Blind Signal Separation
Underdetermined Blind Signal Separation
Blind I/Q Signal Separation for Receiver Signal Processing
Blind Separation of Co-Channel Signals Using an Antenna Array
Separation of Overlapping Radio Frequency Identification (RFID) Signals by Antenna Arrays
Advanced Error Coding
Overview
Reed Solomon
Turbo Code
LDPC
Stochastic Resonance (SR)
Weak Signal Detection using Particle Swarm Optimization (PSO) and Stochastic Resonance
Swarm Coding
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
Adaptive Antenna Arrays using Particle Swarm Optimization
Blind Signal Separation (BSS) using Particle Swarm Optimization (PSO)
Particle Swarm Optimization on FPGA
Motion Tracking using Particle Swarm Optimization
Image Compression using Compressed Sensing (CS) and Particle Swarm Optimization (PSO)
Particle Swarm Optimization in the RWA Process for All-Optical WDM Networks
Particle Swarm Optimization (PSO) in Speech Enhancement
Time Delay of Arrival (TDOA) using Particle Swarm Optimization (PSO)
Particle Swarm Optimization (PSO) in the Grassmannian Line Packing Problem for MIMO Beamforming
Adaptive Particle Swarm Optimization (APSO)
Euclidean Particle Swarm Optimization (EPSO)
Gaussian Particle Swarm Optimization (GPSO)
Noise Reduction using Singular Value Decomposition (SVD) and Particle Swarm Optimization (PSO)
Particle Swarm Optimization (PSO) in Signal Separation
Weak Signal Detection using Particle Swarm Optimization (PSO) and Stochastic Resonance
Adapting Particle Swarm Optimization (PSO) by Deciding on the State of Convergence
Network
Network Protocols
NAT/Firewall Support
Simple Traversal of UDP Through NAT (Classic STUN)
Traversal Using Relay NAT (TURN)
Interactive Connectivity Establishment (ICE)
IEEE802.11
802.11 Distributed Coordination Function (DCF)
An introduction to IEEE 802.11e Standard
An introduction to IEEE 802.11n Standard
Network Utility Maximization for Resource Allocation
Ad hoc Networks
Distortion Minimizing Rate Control
Distortion Based Networking – Ad Hoc Wireless Routing
Medium Access Control (MAC) for Distortion Based Networking
Network Security
CCMP
DTLS
EAP
EAPoL
EAPoW
HTTPS
IPsec
IPsec for Blackfin uCLinux
Secure SIP
SRTP
SSLv3/TLSv1
S-HTTP
WEP
WPA
WTLS
Network Operating Systems
LANsEND
Cryptography
Overview
Encryption
AES
Camellia
CAST-128
CAST-256
CCM
DES
GCM
Rabin
RC4
RSA
RSA Theory
User Authentication
Key Size Selection
SEED
TDEA (3-DES)
CCM
DSA
ECDSA
GCM
GMAC
HMAC
Keywrap (AESKW, AKW1, AKW2, TDKW)
Rabin
RIPEMD
RSA
RSA Theory
User Authentication
Key Size Selection
SHA
Whirlpool
Security
Overview
CCMP
CMS
Data Hiding with Cognitive Imperceptibility
Digital Fingerprinting for Multimedia Security
Document Signature by Multiple Parties
DTLS
EAP
EAP Types
EAPoL
EAPoW
HTTPS
IKEv2
IPsec
JPSEC
JPSEC Authentication Template
JPSEC Decryption Template
JPSEC Hash Template
JPSEC Key Template
JPSEC Registration Authority (RA)
JPSEC Tools
Steganalysis
Real-time Video Steganography
SDES
Secure ACAP
Secure IMAP
Secure SIP
Secure SMTP
S-HTTP
S/MIME
SRTP
SSLv3/TLSv1
WEP
WPA
WTLS
Lawful Intercept
Internal vs External Lawful Interception
Lawful Interception for LTE Networks
Lawful Interception for WiMax Networks
Location-Dependent Lawful Interception
Beamforming for Low Probability of Interception
Session Initialization Protocol (SIP) and Deep Packet Inspection (DPI)
Session Initialization Protocol (SIP) and Deep Packet Inspection (DPI)
Telephony
Overview
Analog Telephony
Digital Telephony
ISDN
Low Speed Digital Carrier Systems (DS1)N
Speakerphone
Data Modems
Overview
Data Modulations
V.21
V.22
V.32
V.34
V.90
56k Modem
V.91
V.92
V.92 Features
Data Protocols
V.42
V.44
Modem Command Sets
Fax Modems
Overview
Fax Modulations
V.27
V.29
V.17
V.34 Fax
Fax Protocols
T.30
Secure Faxing with JPSEC
T.30-E Color
Fax Command Sets
Soft Radio
Products
Services
Specialties
Overview
Beamforming
Advanced Error Coding
Cryptographic Systems
Facsimile Lawful Interception
T.38 FoIP Lawful Interception
Media Gateway
Resources
Overview
Block Diagrams
Datasheets
Developer
Patents
White Papers
Company Info
About Us
Press Releases
Employment
Contact Us
home
|
contact us
|
request quotation
© Copyright 2010, VOCAL Technologies, Ltd. All rights reserved. Rev. 2.28k.