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IP Phone: Wireless

Block diagram (SBD) for Wireless IP Phone using TI’s OMAP Processor, WiLink™ Processor, Touch Screen Controller

Block Diagram

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Touch Screen Controller Audio Codec Headphone Amp Microphone Amp - Not necessary if included in Audio Codec Speaker Amp Speaker Amp Clock USB Logic Level Shift (LS) AC Adaptor Backlight Battery Charger Fuel Gauge Li-Ion Battery Protection DDR Power Core & I/O Power Ring/Vibrate Processor Video Processor RF Transciever WLAN MAC / Baseband Processor CCD AFE Video Amp Video DAC

Design Considerations

The Wireless IP Phone converts voice signals into IP packets using 802.11 standards for transmission over a Wi-Fi network following VoIP protocols. It allows free person-to-person calls anywhere in the world over a wireless broadband IP connection. Adding video functionality allows users to use video conferencing from any Wireless Lan. The future in IP communications systems will integrate PBX phone systems, audio/video conferencing bridges, data collaboration, and IM servers seamlessly across one platform. As IP network deployments continue to grow, consumers are looking for additional features and integration of video streaming capabilities in a cost-effective fashion.


TI's high-performance, DSP-based IP video phone solutions enable a number of features including:

  • Real-time multichannel video integration to existing IP voice phones
  • Three-way video conferencing
  • Real-time synchronization of video with voice across IP networks.

OMAP35x application processors are based on the ARM® Cortex™-A8 core with more than four times the processing power of today's 300MHz ARM9 devices, the superscalar 600 MHz Cortex-A8 core is integrated into four new OMAP35x applications processors.


Additional DSP MIPS are also available for integration of other features and processing requirements. TI's TMS320C64x™ generation of DSPs execute at clock speeds of 600 MHz, providing an optimal solution with headroom left over for incorporating new features.


TI's TMS320DM3x™ processors are powered by an ARM9 core and a video processing subsystem (VPSS). Optimized for portable and other low power consumption HD video products. Doubles battery life of today's HD products.


TI's wireless systems expertise spans devices across multiple communications standards as well as wireless connectivity solutions including WiLink™ mobile lan solutions, NaviLink™ GPS solutions and BlueLink™ solutions. TI solutions enhance the user experience with innovative 3D-graphics, high-quality video applications and advanced user interfaces.


TI offers touch-screen controller solutions like the TSC2117 with integrated ESD protection, headphone and speaker amplifier. The TSC2117 achieves low power consumption and are immune to vibration and display noise; small-footprint packages are available. Touch screen functionality can also be leveraged when needing room for a bigger display.


Integrating crystal clear audio conferencing demands improved audio features such as multi-band equalizers and echo/noise cancellation while maintaining low power consumption. Newer generation TI audio codecs, such as the TLV320AIC3254 process sound with better audio quality and longer battery life. Class-D amplifiers continue to increase in popularity because of their efficiency and their small-footprint packages.

Application Notes

Most useful technical documents for IP Phone: Wireless Help

     

Tools and Software

Name Part # Company Software/Tool Type
Code Composer Studio Integrated Development Environment (IDE) - v4.x CCSTUDIO Texas Instruments Code Composer Studio(TM) IDE
OMAP35x Evaluation Module (EVM) TMDSEVM3530 Texas Instruments Development Boards/EVMs

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