Leveraging Existing

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Leveraging Existing Application Processors in
Mobile Devices to Implement VoIP Client
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VoIP Client Requirements Enabling Rich Telephony
Features on Cellular Handset

• Standards Compliant and Interoperable with VoIP
  networks
• Based on IETF RFC SIP 3261
• Support for standard audio compression formats
  used in VoIP networks
• G.711, G.729A/B, G.723.1, G.726, GSM-AMR, G.722,
  G.722.1, G.722.2 (AMR-WB)
• Implement basic and advanced signaling and call
  control features
• Call Setup, Teardown, Hold/Resume, Transfer,
  Multi-Line appearance
• Local 3-Way conferencing (requires 2-channels),
  bridged-conferencing
• Mid-Call DTMF, CPT, Polyphonic ring tones
• Text Messaging and Presence (SIMPLE)
• Authentication and Security mechanisms
• Proxy Discovery
• Support Hands-Free speakerphone operation
  (Acoustic Echo Cancellation)
• QoS Noise Cancellation, Adaptive Jitter Buffer
  and Lost packet Concealment
• Configurable by provider and user in field

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VoIP Client RequirementsDesign Considerations

• Co-Exist with current applications and OS
• Minimize Memory requirements for program and Data
• Minimize Processing requirements
• Minimize Power dissipation
• Use the existing User Interfaces (MMI) on the
  cellular device
• Field Upgradeable
• Deliver Better Voice Quality and an overall
  better Communication Experience to the Consumer
• And achieve ALL of the above without adding
  additional cost to the BOM

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VoIP Client Traditional ApproachHigh Cost, High
Power, Complex Multi-Processor System

• Application processor Non-Compute Intensive
  Software Modules
• OS
• Network Stacks
• VoIP Protocols, System Framework, System
  Software, Jitter Buffer, Conference Mixer,
  Application, Management SW et..
• UI/GUI/MMI
• Productivity Applications
• Drivers
• DSP Processor Compute Intensive Signal
  Processing Algorithms
• Voice Coders, Echo Cancellers (AEC for Speaker
  Phone), Tone Generators, Lost packet
  Compensation, Noise Canceller, Media Controller,
  Audio capture-playback.
• Complex multi-processor system
• Requires DSP processor which adds power and cost
• Software is more complex and DSP sub-system is a
  black-box, difficult to upgrade
• Locked to proprietary DSP architecture (System is
  not Scalable)
• Requires Separate Tool chains and Software
  development skill set

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VoIP Client SoftDSP ApproachSingle Processor
Solution

• Application processor All Software Modules
  including Media Algorithms
• OS, Network Stacks, Drivers
• VoIP Protocols, System Framework, System
  Software, Jitter Buffer, Conference Mixer,
  Application, Management SW etc.
• Voice Coders, Echo Cancellers (AEC for Speaker
  Phone), Tone Generators, Lost packet
  Compensation, Noise Canceller, Media Controller,
  Audio capture-playback..
• UI/GUI/MMI
• Productivity Applications
• Simple and Flexible Design
• Signal Processing Algorithms on general purpose
  RISC processor
• Scalable for applications like Video over IP
• An Elegant, Simple, low Cost, low Power solution
  for VoIP clients on Cellular Handsets
• Software requires only industry standard general
  purpose RISC Processor Architecture.
• Simply upgrading the Processor will achieve
  better system performance and the SW will be
  reusable without changes
• Unified Tool chains and Software development
  skill set
• Extremely short time to market

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Media Processing SubsystemRequires 90 of
Processing Bandwidth (MHz / Channel)
AEC 128 ms
SpeechEncoder
PCMI/F
VAD
PCM
PacketI/F
CNGEncoder
Tx
SpeechDecoder PLC
Speech/Lost Pkt
Adaptive Jitter Buffer
SID/DTX
CNG
DTMF Generator
Rx
Tones
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Software Partitioning Option1

• Implements complete 2-channel solutions including
  3-way conferencing on AP
• Simple Software Integration on Existing Platform
• Short time to Market of 4 to 10 weeks
• Includes 3-Way conferencing, implemented on AP
• Requires less than 40 MHz/Channel (G.729A/B
  vocoder) on ARMv5TE

• Application Processor (RISC)
• Call Signaling
• Call Control Manager, System and Media Frameworks
• RTP/RTCP, SDP
• Application layer and UI
• Call Conferencing Engine
• Media Processing for Channels - 1 2
• Acoustic Echo Cancellation
• DTMF generation
• CPT and Custom Tones
• QOS Adaptive Jitter Buffer and PLC
• Automatic Gain Control
• Noise Reduction
• PCM Handler

Software Added for VoIP
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Software Partitioning Option1
Channel-1 Media Processing modules (AMR, AEC,
Noise Reduction) targeted on the Application
Processor (ARM RISC CPU)
VoIP Signaling, Packetization Protocols Call
Manager, VoIP media and system Frameworks,
TCP/IP, UDP NW stack
3-Way Conferencing Mixer, Media Processing for
Channel-2 (AMR) targeted on the Application
Processor (ARM RISC CPU)
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Software Partitioning Option II

• Software Distributed between Host RISC Processor
  and DSP processor
• Media Processing for Channel- targeted on DSP
  Processor

• Existing RISC Microprocessor
• Call Signaling
• Call Control Manager, System and Media Frameworks
• RTP/RTCP, SDP
• Application layer and UI
• Encryption
• Call Conferencing Engine
• Media Processing for Channel-2
• DTMF generation
• CPT and Custom Tones
• QOS Adaptive Jitter Buffer and PLC

• Existing DSP core
• Media Processing for Channel-1
• Acoustic Echo Cancellation
• Automatic Gain Control
• Noise Reduction
• PCM Handler

Platform Services
Existing Software available on Platform
Software Added for VoP
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Software Partitioning Option II
Channel-1 Media Processing modules (AMR, AEC,
Noise Reduction). Existing algorithms on Cellular
platform
VoIP Signaling, Packetization Protocols Call
Manager, VoIP media and system Frameworks,
TCP/IP, UDP NW stack
3-Way Conferencing Mixer, Media Processing for
Channel-2 (AMR) targeted on the Application
Processor (ARM RISC CPU)
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Press Release HelloSoft Demonstrates Complete
VoIP Solution on TI OMAP 1710 Cellular Platform
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(No Transcript)
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Hellosofts VoIP SolutionAvailable for ARM
MIPS Processors

• Complete Software Solution includes all necessary
  Protocols, Algorithms, Frameworks and System
  Software for a client device
• Highly Optimized VoIP Solution, designed for
  single RISC Processor-based designs, Eliminates
  the need of DSP (SoftDSP)
• Industry-best Performance for Media Processing
  Algorithms on RISC processors.
• Excellent Voice Quality (PESQ and PSQM Scores)
  comparable or better than DSP-based Solutions.
• Designed for Portability to Different OS/RTOS and
  Processor Architectures (Implements OS
  Abstraction).
• Modular System Architecture.
• Shipping to major Semiconductor and ODM customers

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VoIP Solution for HandsetsSoftware Blocks
Licensed by Hellosoft
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THANKS