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SPIRIT IP-MR™

SPIRIT IP-MR™. draft-ietf-avt-rtp-ipmr-12.txt. Delivering more speech quality over the Net. IP-MR Features. Sampling rates 8, 16, 32 kHz Algorithmic delay 25 ms Configurable layered bitstream Variable, adaptive bitrate 7-34 kbps Build-in packet loss protection. Technology.

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SPIRIT IP-MR™

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  1. SPIRIT IP-MR™ draft-ietf-avt-rtp-ipmr-12.txt Delivering more speech quality over the Net

  2. IP-MR Features • Sampling rates 8, 16, 32 kHz • Algorithmic delay 25 ms • Configurable layered bitstream • Variable, adaptive bitrate 7-34 kbps • Build-in packet loss protection

  3. Technology • Linear Prediction + Pitch Prediction • Multi-Pulse CELP (MP-CELP) for core layer (lower layers) • Multi-Layer Excitation Encoding • MDCT for higher layers • RTP payload packet + 6 classes bits in core layer for protection against packet loss

  4. Quality • PESQ MOS (ITU-T Rec P.862)

  5. Conclusion • SPIRIT IP-MR codec primary designed for multi-user collaborations • Provides optimal channel capacity usage for each participant at zero performance overhead • Maintains high speech quality and packet lost robustness AVT WGLC draft-ietf-avt-rtp-ipmr-12.txt

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