Embedded Software Modules

VOCAL provides developers a comprehensive suite of embedded software modules optimized for DSPs and available for a range of platforms. Our software modules may be licensed individually or as a library. Custom solutions are also available to meet your unique application requirements. Contact us to discuss your application requirements and licensing needs.

VoIP

• Overview
• Network Stack
• NAT/Firewall
• Security
• SIP
• MGCP
• SDP
• RTP
• RTCP
• Vocoders
• Android VoIP SDK
• iOS VoIP SDK

V²oIP

• Overview
• Network Stack
• NAT/Firewall
• Security
• SIP
• SDP
• RTP
• RTCP
• RTSP
• Vocoders
• Video Codecs

Voice Codecs

• Overview
• Voice Over Network Framework – RTP Packetization, AAL2 Framing
• 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 7k Hz audio
  • ITU G.722.2 – Adaptive Multi-Rate Wideband AMR-WB Vocoder Algorithm
  • G723.1 – 5 1/3k and 6.4k bps ACELP/MP-MLQ
  • ITU G.726 – 16k, 24k, 32k and 40k bps ADPCM
  • ITU G.728 – 16k bps LD-CELP
  • ITU G.729 – 8k bps CS-ACELP
  • ITU G.729A – 8k bps CS-ACELP
  • ITU G.729A Annex B – Silence Detection
  • G.729.1 – Embedded Variable Bit-Rate
• GSM Speech Coders
  • GSM 06.10 Full Rate Vocoder
  • GSM 06.20 Half Rate Vocoder
  • GSM 06.60 Enhanced Full Rate Vocoder
  • GSM 06.90 Adaptive Multi Rate Vocoder
• Other Speech Coders
  • iLBC (internet Low Bitrate Codec)
  • MELP (Mixed-Excitation Linear Predictive)
  • MELPe (Mixed-Excitation Linear Predictive enhanced)
  • EVS (Enhanced Voice Services Codec)
  • Speex
  • SILK
  • TSVCIS – Tactical Secure Voice Cryptographic Interoperability Specification
  • Opus

Audio and Voice Processing

• Voice Activity Detection (VAD)
• Packet Loss Concealment (PLC)
• Adaptive Jitter Buffer
• Voice/Facsimile/Data Modem Detection
• Variable Playback / Pitch Corrected Rate Converter
• Audio Sample Rate Converter

Echo Cancellers

• Overview
• Acoustic Echo Canceller
• G.165 Echo Canceller
• G.167 Echo Canceller
• G.168 Echo Canceller

Video Codecs

• Overview
• H.264
• MPEG-4
• JPEG

Lawful Interception

• Overview
• Fax Demodulation
• T.38 Fax Decoder
• Voice Recorder

Radio

• Overview
• Soft Radio
• Radio over IP
• VoIP Radio

Modem

• Overview

Modulations

• V.92 Server/Client/Digital Client 28,000 – 56,000 bps downstream, 24,000 – 48,000 bps upstream,
  (Block Diagram)
• V.90 Server/Client/Digital Client 28,000 – 56,000 bps downstream, 4,800 – 33,600 bps upstream,
  (Block Diagram)
• 56k modem 28,000 – 56,000 bps downstream, 4,800 to 33,600 bps upstream,
  (Block Diagram)
• V.91 All Digital Mode, 28,000 to 64,000 bi-directional
• V.34 2400 to 33,600 bps
• V.32/V.32bis 4800 to 14,400 bps
• V.23 75 – 1,200 bps
• Bell 202 75 – 1,200 bps
• V.22bis 1,200 and 2400 bps
• V.22 1,200 bps
• Bell 212 1,200 bps
• V.21 300 bps
• Bell 103 300 bps

Protocols

• V.42 LAPM Error Correction, Detection
• V.42bis Lempel-Ziv Data Compression
• V.44 LZJH Data Compression
• MNP 2-4 Error Correction
• MNP 5 Data Compression
• MNP 10 Protocol Extensions for Cellular

Modem over IP

• Overview
• RAS over IP
• Block Diagram

Group 3 Facsimile

• Overview

Modulations

• V.34fax – 2400 to 33,600 bps
• V.17 – 7200, 9600, 12,000 and 14,400 bps
• V.33 – 12000 and 14400 bps
• V.29 – 7200 and 9600 bps
• V.27ter – 2400 and 4800 bps
• V.21 Channel 2 – 300 bps FSK

Protocols

• T.30 Fax Protocol
• T.30-E Color Fax Protocol
• T.30 Error Correction Mode
• Image Format Conversion
• T.6, MMR Image Format Conversion
• JBIG Image Format Conversion
• T.4 Copy Quality Checking/Correction

Command Sets

• Industry Standard Command Set
• V.250 (V.25ter) Command Set
• V.251 Command Set
• V.252 Command Set
• V.253/IS-101 Voice Command Set (Fclass 8)
• T.32 Fax Class 2.1 for V.34Fax
• T.31 Fax Class 1/1.0 (EIA-514)
• Fax Class 2/2.0 (EIA-592)
• Custom Command Set

Fax over IP

• T.38 Real-Time Fax Relay Over IP
• T.38 V.8/V.34 Extensions
• T.38 Spoofing Extensions
• T.37 Store and Forward Simple and Full Modes
• Block Diagram

Telephony

• North American Dialing Procedures
• North American Call Progress Generation/Detection
• International Dialing Procedures
• International Call Progress Generation/Detection
• DTMF Generation/Detection
• Caller ID  Type I and II
• Call Waiting/Call Forwarding/Call Block features
• Acoustic, Line, and Digital Network Echo Cancellers
• General Purpose Tone Detectors/Generators
• Ring detect and distinctive ring detect
• Automatic Gain Control
• Voice Activity Detection (VAD)
• Packet Loss Concealment (PLC)
• Adaptive Jitter Buffer
• Voice/Facsimile/Data Modem Detection
• Multi-tasking environment compatible

Digital Telephony

• ISDN Interface
• V.110 Rate Adaptation
• V.120 Rate Adaptation
• HDLC B Channel (7 or 8 bit)

Telephony Signaling

• MF Generation/Detection
• MF R2 Compelled/Semi-Compelled Signaling
• MF R1 Signaling
• TIA 468A DTMF Signaling
• Bellcore Interoffice Signaling
• Q.921 LAPD Protocol
• Q.922 LAPF Protocol
• Q.931 ISDN Call Signaling
• Q.932 Frame Relay Call Signaling

3G Cellular

• 3G-AMR Vocoder
• Transceiver Implementation
• Turbo Decoder

Speakerphone

• Overview
• Half-Duplex Speakerphone for Low MIPS
• Full Duplex Speakerphone for High Performance
• Echo Cancellation
• Acoustic Echo Canceller (AEC)
• Audio over IP

Security and Cryptography

• Overview
• SDES
• SRTP
• AES
• DES
• 3-DES
• CCMP
• RC4
• SHA1
• RSA
• IPsec

Nat/Firewall Support

• Overview
• BOOTP – Protocol (RFC 1497)
• DHCP – Dynamic Host Configuration Protocol (RFC 2131)
• MIB I (RFC 1156)
• RIP – Routing Information Protocol (RFC 1058)
• RIP 2 – Routing Information Protocol (RFC 1723)
• STUN – Simple Traversal of UDP over NATs (RFC 3789)
• PPP – PPP – Point to Point Protocol (RFC 2153)
• PPPoE – PPP over Ethernet (RFC 2516)
• Gateway and DMZ Port Forwarding

STUN, TURN and ICE

• Overview
• STUN – Simple Traversal of UDP over NATs (RFC 8489, previously RFC 5389)
• TURN – Simple Traversal of UDP over NATs (RFC 8656, previously RFC 5766)
• ICE – Simple Traversal of UDP over NATs (RFC 8445, previously RFC 5245)

LANsEND Network Stack

• Overview
• IPv4 – Internet Protocol Version 4 (RFC 791)
• TCP – Transmission Control Protocol (RFC 793, RFC 1323)
• UDP – User Datagram Protocol (RFC 768)
• TCP/IP Header Compression (RFC 1144)
• PPP – Point to Point Protocol (RFC 2153, RFC 1662)
• PPPoE – PPP over Ethernet (RFC 2516)
• PAP/CHAP Authentication (RFC 1994)
• IPCP – Internet Control Protocol (RFC 1332)
• ICMP – Internet Control Message Protocol (RFC 792)
• ARP – Address Resolution Protocol (RFC 1027)
• RARP – Reverse Address Resolution Protocol (RFC 903)
• BGP – Border Gateway Protocol (RFC 1771)
• BOOTP – Protocol (RFC 1497)
• DHCP – Dynamic Host Configuration Protocol (RFC 2131)
• FTP – File Transfer Protocol (RFC 959, RFC 2228)
• TFTP – – Trivial File Transfer Protocol (RFC 1350, RFC 2228)
• HTTP – HyperText Transfer Protocol (RFC 2616, RFC 2228)
• MIB I (RFC 1156)
• MIBII (RFC 1213)
• RIP – Routing Information Protocol (RFC 1058)
• RIP 2 – Routing Information Protocol (RFC 1723)
• SliP – Serial Link Internet Protocol (RFC 1055)
• SNMP – Simple Network Management Protocol (RFC 1155,
  RFC 1157,
  RFC 1215,
  RFC 1351,
  RFC 1352,
  RFC 1353,
  RFC 1420,
  RFC 3411,
  RFC 3412,
  RFC 3414,
  RFC 3415)
• NTP – Network Time Protocol (RFC 1305)
• SNTP – Simple Network Time Protocol (RFC 2030)
• STUN – Simple Traversal of UDP over NATs(RFC 3789)
• Telnet – Telnet Protocol (RFC 854)