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