GAO Research G.729AB Real-time Evaluation now Available Online



Toronto, Canada – September 29th, 2005 – GAO Research Inc., ( a leading provider of embedded communication software, released an online demo of its G.729AB codec, available at This real-time demo allows customers to sample the high fidelity of GAO’s G.729AB algorithm. Users may supply their own WAV file, and can adjust simulation parameters such as network jitter and packet loss. GAO’s G.729AB vocoder is off-the-shelf available and fully optimized for Texas Instruments’ C5000 and C6000 series DSPs, and Analog Devices’ Blackfin processor family. The codec is also available on other popular platforms such as ARM9, Intel’s Xscale and Pentium processors, and Freescale’s PowerPC amongst a few.

“Today’s VoIP devices all support the ITU-T G.729AB codec, making it the most sought after speech processing algorithm by our customers.” said Dr. Frank Gao, president of GAO Research Inc. “Customers always demand to sample the quality of a voice codec before they make the purchase. We want to present a convenient method for our customers to accurately evaluate the fidelity of our codec under simulated network conditions. Customers can expect very similar results when our algorithm is implemented on their system.”

GAO’s G.729AB codec is based on the Code Excited Linear Prediction Model (CELP) and Conjugate-Structure Algebraic CELP (CS-ACELP). Some applications for GAO's G.729AB vocoder include visual telephony, wireless communications, and digital satellite communication systems. The G.729A ITU-T standard for voice coding compresses 8 kHz linear audio signals and encodes them for transmission at 8 Kbps with reduced complexity compared to G.729. The ITU-T G.729B & G.729AB standard is a silence compression scheme for G.729 & G.729A, optimized for terminals conforming to Recommendation V.70.

GAO’s G.729AB Voice Codec Features:

 Compliant to ITU-T G.729 Annex A and Annex B standards
 Fully optimized for Texas Instruments TMS320C5000 and TMS320C6000 family of DSPs
 Fully optimized for Analog Devices Blackfin Processor family
 Other supported platforms: ADSP21xx, ARM9, CEVA Teak and TeakLite, Intel Xscale and Pentium processors, MIPS32 and MIPS64 cores, Freescale PowerPC, Renesas SuperH, and STMicroelectronics ST20 and ST40 cores

About GAO Research Inc.

GAO Research Inc. is the leading provider of embedded communications software for telecommunications, semiconductor, and electronics companies worldwide. GAO offers its VoIP & FoIP solutions, V.92 & V.90 with all fallback soft-modems, Super G3 & G3 fax software, speech and video codecs on the broadest range of DSPs and microprocessors. Gao's solutions undergo rigorous testing and certification to surpass industry benchmarks. GAO Research is the preferred vendor for Motorola, Lucent, Alcatel, Qualcomm, Philips, Terayon, Telcordia, OKI, Marconi, Siemens, Infineon, Mitsubishi, Intercom, LG Electronics, Toshiba and other global customers. For a partial list of GAO Research clients, visit

The appeal of GAO Software implementations for communication technologies has increased dramatically as the industry has realized the advantages that GAO's software offers compared to fixed-function chip sets. In addition to unparalleled flexibility, minimal footprint, lowered power consumption & wide-ranging platform support, GAO's products offer easy upgrades and the inclusion of extended functionality with excellent price to performance ratios.

Media Contacts:
Kaashif Asghar/David Ou
Email: [email protected]
Tel: 416-292-0038 Ext:221/818

All trademarks and brand names mentioned are the property of their respective owners as applicable under individual trademark guidelines as submitted to the U.S. Trademark and Patent Office.

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