TW2834

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 High performance 2x zoom to horizontal and

vertical direction for display path

 Supports save and recall function for display

path

 Extendable up to 8-/16-channel video controller

using cascade connection

 Quad MUX switch with 32 queues and/or

manual control by interrupt for record path

 Character/bitmap overlay for OSD with 720x480

resolution in NTSC/720x588 in PAL

 Sixteen programmable single boxes overlay

 Four 2D arrayed boxes overlay with dual color

for motion result or table display

 Mouse pointer overlay

 Analog/digital channel ID encoder

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

 Four 10-bit video CMOS DACs

Block Diagram

PBCLK

PBIN

VDOUTY

VIN3B

VIN3A

VIN2B

VIN2A

VIN1B

VIN1A

VIN0B

VIN0A

Motion Detect

ITU-R BT656

Decoder

VOUTYX

ADDRX/BA1X/BA0X/RASBX/CASBX/WENBX/DQMX/DATAX

VDOUTX

VOUTCX

Memory Interface

ITU-R BT656

Encoder

Write

Control

Read

Control

Clock Generator

CLK54I

NMIRQ

IRQ Interface

HOST Interface

VOUTYY

VOUTCY

CLK27ENCX

CLK27ENCY

HSPB

HCSB0

HCSB1

HALE

HRDB

HWRB

HDAT

Encoder Timing Interface

HSENC

VSENC

FLDENC

LINK

ADDRY/BA0Y/RASBY/CASBY/WENBY/DQMY/DATAY

Channel ID

Decoder

Video

Encoder

OSD

Box

Mouse

Overlay

Channel

ID

Encoder

Memory Interface

ITU-R BT656

Encoder

Write

Control

Video

Encoder

Read

Control

Scaler

Scaler

Motion Detect

Scaler

Scaler

Motion Detect

Scaler

Scaler

Motion Detect

Scaler

Scaler

Video

Decoder

Video

Decoder

Video

Decoder

Video

Decoder

OSD

Box

Mouse

Overlay

Zoom

&

Image

Enhance