Page 1
查询TW2835供应商查询TW2835供应商
TW28355
4 Channel Video and Audio Controller
For Security Applications
Target ApplicationsTarget Applications
Analog QUAD/MUX System
4/8/16 Channel DVR System
Car Rear Vision System
Hair Shop System
Dental Care System
FeaturesFeatures
Four Video Decoders
Accepts all NTSC(M/N/4.43) /
PAL(B/D/G/H/I/K/L/M/N/60) standards with
auto detection
Integrated four video analog anti-aliasing
filters and 10 bit CMOS ADCs
High performance adaptive 4H comb filters for
all NTSC/PAL standards
IF compensation filter for improvement of
color demodulation
Color Transient Improvement (CTI)
Automatic white peak control
Programmable hue, saturation, contrast,
brightness and sharpness
High performance horizontal and vertical
scaler for each path including playback input
Fast video locking system for non-realtime
application
Four built-in motion detectors with 16X12 cells
and blind and night detectors
Additional digital input for playback with ITU-R
BT.656 standard
Auto cropping / strobe for playback input with
Channel ID decoder
Supports four channel full D1 record mode
Dual Video Encoders
Dual path digital outputs with ITU-R BT.656
standard
Dual path analog outputs with all analog
NTSC/PAL standards
Programmable bandwidth of luminance and
chrominance signal for each path
Three 10bit video CMOS DACs
The TW2835 has four high quality NTSC/PAL video decoders, dual color
display controllers and dual video encoders. The TW2835 contains four
built-in analog anti-aliasing filters, four 10bit Analog-to-Digital converters,
and proprietary digital gain/clamp controller, high quality Y/C separator to
reduce cross-noise and high performance free scaler. Four built-in motion,
blind and night detectors can increase the feature of security system. The
TW2835 has flexible video display/record/playback controller including
basic display and MUX functions. The TW2835 also has excellent graphic
overlay function that displays bitmap for OSD, single box, 2D array box,
and mouse pointer. The built-in channel ID CODEC allows auto decoding
and displaying during playback and the additional scaler on the playback
supports multi-cropping function of the same field or frame image. The
TW2835 contains two video encoders with three 10bit Digital-to-Analog
converters to provide 2 composite or S-video. The TW2835 also includes
audio CODEC that has four audio Analog-to-Digital converters and one
Digital-to-Analog converter. A built-in audio controller can generate digital
outputs for recording/mixing and accepts digital input for playback. The
TW2835 can be extended up to 8/16 channel video controller using chip
to-chip cascade connection.
Dual Video Controllers
Support full triplex function with 4ch live, 4ch playback display and
4ch record output
Analog/Digital channel ID CODEC for record and playback application
Support adaptive median filter for Record
Supports pseudo 8 channel and/or dual page mode
Horizontal/Vertical mirroring for each channel
Last image captured when video-loss detected
Auto sequence switch with 128 queues and/or manual switch by
interrupt for record path
Channel skip in auto sequence switch for record path when video-loss
detected
Image enhancement for zoomed or still image in display path
High performance 2X zoom to horizontal and vertical direction for
display path
Extendable up to 8/16 c hannel video controller using cascade
connection
Quad MUX switch with 32 queues and/or manual control by interrupt
for record path
64 color bitmap OSD overlay with 720x480 in NTSC / 720x588
resolution in PAL
Four programmable single boxes and four 2D arrayed boxes overlay
Mouse pointer overlay
Audio CODEC
Integrated four audio ADCs and one audio DAC
Provides multi-channel audio mixed analog output
Supports a standard I2S interface for record output and playback
input
8/16 bit audio word length
Sample audio with 8/16KHz
Download from www.ICminer.com Electronic-Library Service
Page 2
TW2835 Block Diagram
TW28355
4 Channel Video and Audio Controller
For Security Applications
ADDR/BA/RASB/CASB/WENB/DQM/DATA
PBCLK
PBIN
VIN0A
VIN0B
VIN1A
VIN1B
VIN2A
VIN2B
VIN3A
VIN3B
AIN0
AIN1
AIN2
AIN3
AOUT
MUXMUXMUXMUX
ADC ADC ADC ADC
ADC ADC ADC ADC DAC
Channel ID
Decoder
ITU-R
BT656
Decoder
Video
Decoder
Video
Decoder
Video
Decoder
Video
Decoder
Decimation Filter
Decimation Filter
Decimation Filter
Decimation Filter
Interpolation Filt er
I2S Interface
Playback
Path Control
Auto-Crop &
Multi-Scaler
Dual Scaler
Motion Detect
Dual Scaler
Motion Detect
Dual Scaler
Motion Detect
Dual Scaler
Motion Detect
Encoder
Timing
Interface
Display
Path
Write/
Read
Process
Record
Path
Process
Video
Encoder II
ITU-R
BT656
Encoder
Video
Encoder II
8x8
Matrix
4x4
Matrix
Control
MPP Interface HOST Interface IRQ Interface
Clock
Generator
HSENC
VSENC
FLDENC
HLINKI
VLINKI
DLINKI
DAC
DAC
DAC
VAOYX
VAOCX
VDOX
VDOY
VAOYY
CLKMPP1
CLKMPP2
CLKVDOX
CLKVDOY
DLINKI/MPP1/2
HSPB/HCSB0,1/HALE
HRDB/HWRB/HDAT
IRQ
CLK54I
80
NASDAQ:T WLL
Download from www.ICminer.com Electronic-Library Service
Loading...