N e v e r s t o p t h i n k i n g. IP-Phone solution 2nd Workshop on Wideband Speech Quality in Terminals and Networks: Assessment and Prediction 22nd and 23rd June 2005 – Mainz, Germany A Wideband capable VoIP Chipset called INCA-IP “Aspects of Wideband Speech Quality as seen by the Customer System Engineering” : Frank Meier, Infineon Technologies

INCA-IP: Converging from a Single Chip to a Complete System

INCA-IP: Hardware Overview

INCA-IP: Analog Front End Analog Front End fully integrated - no external amplifier necessary Design proven in INCA-P 3 Different Inputs Handset Microphone Headset Microphone Handsfree Microphone 3 Different Outputs Handset Speaker Headset Speaker Handsfree Speaker AFE is Wideband capable

INCA-IP: Digital Signal Processor Full Duplex Speakerphone with Noise suppression Handset echo control (Normal handset only achieves 45 dB, ITU spec. 60dB) Enhanced full duplex handsfree speech for G.722 Automatic Gain Control Caller-ID Transmitter Speech Recognition (DTW) Tone Generation for Ringing and DTMF 3-Party conferencing with mixed coders Voice Coding/Compression -G.711 -G G.729 A/B -G.722 -G.726

INCA-IP: CPU subsystem Clock speed up to 150 MHz Subsystem is reused from other projects MIPS32 4Kc TM RISC CPU SDRAM Controller Cache Controller 4k I-Cache and 4k D-Cache (2 way set associative) Memory Management Unit prepared for any OS Clock generation unit Advanced power management Interrupt arbitration in parallel to CPU operation Optimized bus architecture for maximum bandwidth

INCA-IP: Compact and Standard Version Same hardware concept for Compact, Entry, Standard and Office Phone Same package and pin-out Software synergy for both chips

INCA-IP: Tools INCA-IP Tool Package –Demonstration Board –Software Package –Documentation –Accessories Demonstration Setup –Voice over IP connection –Different Voice Codecs –Full Duplex Speakerphone –Complete IFX VoIP Phone Software available

INCA-IP: Complete SW Solution (1) Fully integrated IP Phone software solution Based on open source LINUX OS Telco grade, toll quality performance Extensive QoS support High-level, user friendly APIs Standard Networking Support (IPv4, TCP, UDP, ICMP, ARP) Web-based management, SNMP Remote Upgrade Capabilities SIP (RFC 3261, RFC 3265, RFC 3515, RFC 3264, RFC 2782 and RFC 3428) SDP(RFC 2327) RTP/RTCP (RFC 3550) Secure RTP (RFC 3711) Adaptive Jitter buffer DHCP option for SIP (RFC 3361) DNS support for SIP

INCA-IP: Complete SW Solution (2) Three-way conferencing Voice activated dialling Volume control Codec selection Loudhearing/handsfree/headset selection Address book Instant messaging Call on hold Call waiting Call forward Call transfer Call blocking (do-not-disturb)

SW Stack

SW Interop Lab Fully automated –automatic dial –ring detection –bidirectional voice detection –RTP stream capturing –etc. Automatic report generation More than 35 competitor phones included

Overall Problems with WB Typical problems that occured during development of the INCA-IP system and that have been recorded by the Infineon customer system engineering: End user acceptance is still very low („sounds strange“) –they are used to phones that sound like a phone The vendor´s acceptance is medium but priority to switch over to WB is low („We have planned it for one of our next phones…“) Codec Situation is unclear (G.722, G.722.1, G.722.2, … ?) Knowledge about codecs and SW at all of system vendors decreases  new tasks for us

Possible Blocking points for the acceptance of WB Still unsolved problems –The „perfect“ Codec is needed (One Codec for Low Bitrate up to High Quality) –Quality of the lower frequencies (Speaker, Mic, Housing) Guaranteed Bandwidth / QoS in the WAN/Internet –Home User: Absolute Low Cost, Telephone „For Free“ –Professional User: High Quality, Reliability, Availability –Both: Additional costs have to be low! Missing Infrastructure, Today WB is usually an isolated Solution, e.g. inside a Company Network –Telecom Provider need should push the Usage of WB Interop not tested or not even wanted by all vendors –„POTS phones are always compatible“