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ADI baseband processors enable multimedia functions in low-cost handsets

Posted: 22 Feb 2007 ?? ?Print Version ?Bookmark and Share

Keywords:processor? multimedia IC? GSM/GPRS? ADI? SoftFone?

SoftFone <a href=baseband processors from ADI" ALIGN="RIGHT">

Analog Devices Inc. has announced the availability of two highly integrated baseband processors designed to enable multimedia functions in low-cost GSM/GPRS cellular phones. The new SoftFone AD6721 reduces the cost and component count of entry-level multimedia phones, and the SoftFone AD6722 adds an integrated image signal processor (ISP) for cameras up to 3Mpixels and direct camera interface to eliminate the need for a separate camera coprocessor. Together, these devices enable a rich multimedia functionality in low-cost handsets, including both improved image quality and better sound, ADI said.

No coprocessors
The SoftFone AD6721 (Atlas-2H) and AD6722 (Dione) multimedia baseband processors leverage ADI's DSP technology and an ARM7 TDMI MCU to perform both the communications and A/V signal processing tasks in media-rich handsets. The AD6722, manufactured in a 90nm process, includes an integrated ISP and direct interface to cameras and QVGA displays. The ISP, which provides JPEG encoding and decoding, color conversion, auto focus sharpness measurement, scaling and overlay control functions, eliminates the need for camera coprocessors and dramatically lowers the cost of multimedia phones.

Both SoftFone devices also include a wide range of peripheral interfaces, including USB; an IrDA transceiver, which brings IR capabilities to the handset; an SD/MMC card interface for removable storage; and multiple programmable serial and parallel ports. The analog functions include voiceband codec, stereo audio converters and speaker/headphone amplifiers, and multiple analog audio channels for hands-free speakerphone operation and FM radio connection. The radio interface also provides seamless connection to the company's AD6548 Othello-G direct-conversion quad-band GPRS transceiver. The AD6721 and AD6722 also include a complete power management subsystem, consisting of multiple voltage regulators, battery charging control and direct battery connection.

Software compatibility
The AD6721 and AD6722 are software-compatible with previous GSM/GPRS SoftFone baseband processors. Protocol stack and applications software is also available for each device, provided directly by ADI.

"Multimedia functionality is no longer reserved for only high-end, expensive cellular phones," said Christian Kermarrec, VP for RF and wireless systems, ADI. "Lower-end handsets are also expected to have camera phone capabilities, MP3 and AAC audio playback for both ring tones and full-track music files. However, handset manufacturers have been limited in their cost-reduction plans by the cost of multimedia coprocessors that have generally been needed in phones with these capabilities. Our new SoftFone products address this by bringing a high level of multimedia functionality and eliminating the coprocessors."

The SoftFone AD6721 and AD6722 multimedia baseband chipsets are available today. Pricing information available directly from ADI.

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Related Datasheets
Part Number Description Category
? AD6721 Atlas-2H Integrated GSM/GPRS Baseband Processor ICs, Power Management
? AD6722 Dione Integrated GSM/GPRS Baseband Processor ICs, Power Management



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