Digital terrestrial tuner technologies provide advanced reception capabilities

MARKHAM, Ontario - March 19, 2003 - ATI Technologies Inc. (TSX:ATY,
NASDAQ:ATYT) announced today that Comtech Technology Co. Ltd, has chosen the
NXT2004(tm) VSB/QAM Receiver and the NXT6000(tm) DVB-T Receiver for its latest generation of digital terrestrial tuners. Based in Taiwan, Comtech manufactures tuners, modules and converters for set-top box (STB), cable TV and RF related products

The tuner/demodulator products are intended for terrestrial and digital cable compatible TV, set-top box, and PC-DTV (personal computer-digital
television) products for countries using the ATSC (Advanced Television Systems Committee) and the DVB-T (Digital Video Broadcasting Project-T) standards.

"Based on strong customer demand, we deliver our digital terrestrial tuners to the DTV, STB, and PC-DTV markets. Quality and performance are more important than anything else," said Tony Hsieh, R&D manager at Comtech Technology Co., Ltd. "ATI's NXT6000 offers automatic transmission mode detection including number of carriers and guard interval. NXT6000 has more features such as full DVB-T and NorDig compliance as well as programmable adjacent channel and adaptive co-channel interference cancellation. We chose ATI to deliver all of these necessary features for a high performance terrestrial tuner coupled with good technical support. We're glad to offer ATI's NXT2004 and NXT6000 in our products."
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"We're seeing a greater demand for DTV solutions from companies such as Comtech to meet the need for high quality and strong performance in tuner/receiver technology," said Yujing Wei, Greater China manager, marketing and business development, DTV/Consumer Products Group, ATI Technologies Inc. "ATI's NXT2004 and NXT6000 receiver technologies will enable Comtech to deliver exceptional digital terrestrial tuner solutions for their customer base."

The NXT2004 VSB/QAM (vestigial side band/quadrature amplitude modulation) Receiver is designed for a variety of applications including off-air and digital cable television receivers, set-top boxes, PCDTV and datacast applications where cost, low power and industry leading performance are a must. The NXT2004 VSB/QAM Demodulator is configurable to work in either the ATSC compliant 8 VSB mode for terrestrial broadcasting or in the ITU-J.83B/SCTE DVS-031 compliant 64 QAM or 256 QAM modes.

The NXT6000 COFDM (code orthogonal frequency-division multiplexing) Demodulator and FEC (forward error correction) IC is a highly integrated solution for digital terrestrial receiver applications. This single-chip receiver includes a COFDM Demodulator together with Viterbi and Reed Solomon Forward Error Correction and an integrated 10 Bit A/D converter. The NXT6000 not only supports all modes of the DVB-T standards as defined by ETS 300 744, but also meets the mandatory requirements of the NorDig Receiver Specification that defines a set of requirements for high-performance terrestrial receiver solutions.

ATI Technologies will exhibit its DTV technologies on March 21-23 at China Cable Broadcasting Network 2003 at booth #3606 in Hall 3 of the China International Exhibition Center, Beijing, China.

About Comtech Technology Co., Ltd.
Comtech Technology Co., Ltd. is a Taiwan-based company that has manufactured a variety of tuners, modules or converters for STB, cable TV and RF related products since its foundation in 1993 and has moved most of its production lines to mainland China recently. For more information, please access http://www.comtech-tw.com.tw