OVERVIEW

The QS7779PM/CM is an audio processor IC which implements a decoder for stereo matrix encoded source materials such as the Dolby Surround Pro Logic and mixed DVD (AC?3) with surround virtualization using QSound? technology developed and licensed by QSound Labs, Inc. This chip produces enhanced stereo sound for a stereo input signal and if the input signal contains matrix encoded surround sound, the chip decodes it and produces 3D virtualized surround sounds with two speakers.

FEATURES

■ Capable of decoding Dolby Surround materials such as Dolby Pro Logic or other matrix surround encoded materials (DVD/AC?3)

■ Virtualized surround sound with two speakers

■ 3D stereo sound enhancement

■ Two enhanced levels

■ Parallel and serial digital interface for mode control

? QS7779CM for I2C 2 control pins serial interface (Data, Clock)

? QS7779PM for three-wire serial interface (Data, Clock and Strobe)

■ Supply voltage (analog): 5 to 13V

Supply voltage (digital): 4.5 to 5.5V

■ 24-pin SSOP packaging

APPLICATIONS

■ DVD, Laser disk player

■ Audio systems including TV, Radio and VCR

■ Computer-based multimedia products, including sound cards and powered loudspeakers