vOpen Library

The vOpen library consists of a comprehensive set of field-proven voice algorithms and industry-standard voice protocols. The data input and output, memory allocation and module-to-module communication interfaces of the voice algorithms conform to the vOpen Interface Specification. This ensures that each algorithm will easily integrate and run concurrently with other vOpen algorithms, and handle multiple voice channels, from two to 1000s, simultaneously. The vOpen voice algorithms are C-callable and can be used within D2's vOpen Framework or a customer-provided application framework. The vOpen algorithms are available for MIPS, ARM, x86 and PowerPC cores and the Texas Instruments family of DSP processors such as C54x, C55x, and C60x.


DSP Reference Platforms
  • Texas Instruments C54x/C55x/C64x , Texas Instruments C55-NEXT

DSP Algorithms

    Telephony Algorithms
    • Continuity Check Tone Detection
    • DTMF Detection/Removal
    • FAX and Modem Tone Detection
    • Long DTMF Tone Detection
    • Low Complexity DTMF Detection
    • Multifrequency (MF) Tone Detection
    • Tone Generation
    • Universal Call Progress Tone Detection
    • Voice Activity Detection and AGC

    Echo Cancellers
    • G.168 Single Reflector Network Echo Canceller
    • G.168 Network Echo Canceller

    Standard Voice Coders
    • G.722.1 Voice Coder
    • G.723.1 Voice Coder
    • G.723.1 + Annex A Voice Coder
    • G.726 Voice Coder
    • G.728 Voice Coder
    • G.729 Voice Coder
    • G.729A Voice Coder
    • G.729 + Annex B Voice Coder
    • G.729A + Annex B Voice Coder
    • G.729E Voice Coder
    • GSM/6.10 Voice Coder (ETSI)
    • GSM/6.10 Voice Coder (Microsoft)
    • GSM/AMR Voice Coder (ETSI)
    • GSM/EFR Voice Coder (ETSI)

    Data Modems and Fax
    • Caller Identification Send/Receive
    • International Caller Identification
    • Caller Identification with Call Waiting
    • FAX Modem Data Pumps
    • Fax Relay (I.366.2/T.30) + Group 3 Modems
    • Fax Relay (T.38/T.30) + Group 3 Modems
    • HDLC Transmit/Receive

    Telephone Set Solutions
    • Full Duplex Speaker Phone