LG GB175 Service Manual page 20

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Noise Reduction
Echo Suppression / Echo Cancellation
Advanced Sidetone Oscillation Reduction
Digital sidetone generator with programmable gain
Two programmable acoustic compensation filters
GSM/GPRS quad vocoders for adaptive multirate (AMR), enhanced full rate (EFR), full rate
(FR) and half rate (HR)
FR error concealment
GSM channel coding, equalization and A5/1, A5/2 and A5/3 ciphering
GPRS GEA1, GEA2 and GEA3 ciphering
Programmable GSM/GPRS Modem
Packet Switched Data with CS1/CS2/CS3/CS4 coding schemes
GSM Circuit Switch Data
GPRS Class 12
Voice Interface and Voice Front End
Two microphone inputs sharing one low noise amplifier with programmable gain and automatic
gain control (AGC) mechanism
Voice power amplifier with programmable gain
2nd order Sigma-Delta A/D Converter for voice uplink path
D/A Converter for voice downlink path
Supports half-duplex hands-free operation
Compliant with GSM 03.50
3.1.4 Multi-Media Features
LCD/NAND Flash Interface
18-bit Parallel Interface supports 8/16 bit NAND flash and 8/9/16/18 bit Parallel LCD
8/16 bit NAND Flash Controller with 1-bit ECC correction for mass storages
2 Chip selects available for high-density NAND flash device
Serial LCD Interface with 8/9 bit format support
LCD Controller
Hardware accelerated display
Supports simultaneous connection to up to 2 parallel LCD and 1 serial LCD modules
Supports format: RGB332, RGB444, RGB565, RGB666, RGB888
Supports LCD panel maximum resolution up to 800x600 at 16bpp
Supports hardware display rotation
Capable of combining display memories with up to 4 blending layers
Accelerated Gamma correction with programmable gamma table.
Image Signal Processor
8 bit YUV format image input
Capable of processing image of size up to VGA
Flexible I/O voltage of 1.8V ~ 2.8V
Audio CODEC
Wavetable synthesis with up to 64 tones
Advanced stereo wavetable synthesizer
Wavetable including GM full set of 128 instruments and 47 sets of percussions
PCM Playback and Record
Digital Audio Playback
HE-AAC decode support
Audio Interface and Audio Front End
Supports I2S interface
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