CXD2728Q Datasheet | Sony Semiconductor Solutions

Single-Chip Dolby Pro Logic Surround Decoder Description The CXD2728Q is a CMOS LSI developed for Dolby Pro Logic Surround. A SRAM for short delay and AD/DA converters are built in, and all functions necessary for Dolby Pro Logic Surround such as an adaptive matrix, a passive decoder including Modified Dolby B-type NR, auto input balance, a noise sequencer and center channel mode control are contained on a single chip. Further, this LSI also supports Dolby 3 Stereo and Virtual Dolby Surround. Features - Dolby Pro Logic Surround decoding with a single chip - 2-channel 1-bit AD converter and decimation filter - 4-channel 1-bit DA converter and oversampling filter - 32K-bit SRAM for short delay - No separation or other variance for digital processing - External parts reduced due to the built-in AD/DA converters Functions - Adaptive matrix - Center channel mode control (Normal/Phantom/Wide) - Dolby 3 Stereo - Auto input balance control (ON/OFF) - Noise sequencer - Variable delay time (0 to 46.4ms) - 7k Hz low-pass filter (12d B/Oct) - Modified Dolby B-type NR - Simple SFC function - Virtual Dolby Surround - SFC mode...