VX1828B
Preliminary Datasheet
Video Processor for Middle Size LCD Panel
P.6/P.64
V1.0 050420
2. GENERAL DESCRIPTION
VX1828B is a high quality video processor IC for middle size LCD panel application. VX1828B can
accept digital or analog video inputs, then output digital or analog video signals. The digital input is
CCIR656 and the analog input is NTSC/PAL video signals from TV tuner, DVD, or VCR sources,
including weak and distorted signals. VX1828B decodes these video inputs into R/G/B analog signals
or CCIR656 digital format. The R/G/B analog signals directly drive the panel with build-in timing
controller.
The build-in automatic gain control (AGC) and 10-bit 2-channel AD converters maintain high-resolution
video quality, and with automatic video mode detection, user can freely switch and adjust variety of
signal source. The multiple internal adaptive PLLs also can help precisely extract pixel clock from
video source and perform sharp-and-keen color demodulation. Adaptive 2-D comb-filter, 2-D
sharpening, and synchronization are implemented with build-in line-buffers.
The output format of VX1828B directly supports 480/960/1200/1440/1920x234 analog TFT-LCD
modules.
VX1828B
Video
MUX
2-Channel
AFE
Video
Decoder
Horizontal
Scaler
Line
Buffer
Host
Interface
2-Wire
Serial Host
Signals
HOST
3-Channel
DAC
S-Video 2
S-Video 1
CVBS 2
CBVS 1
R / G / B
Control
Signals
LCD Timing
Controller
PLL
Crystal
CCIR 656
CCIR 656
OS
OSD
Picture
Enhancement
Figure 2.1 Block Diagram
