tw2835 Intersil Corporation, tw2835 Datasheet

tw2835

Manufacturer Part Number

tw2835

Description

4 Channel Video And Audio Controller For Security Applications

Manufacturer

Intersil Corporation

Datasheet

1.TW2835.pdf (2 pages)

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Target Applications

Features

Dual Video Encoders

Four Video Decoders

Analog QUAD/MUX System

4/8/16 Channel DVR System

Car Rear Vision System

Hair Shop System

Dental Care System

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 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

Techwell

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

Audio CODEC

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 channel 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

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

4 Channel Video and Audio Controller

TW2835 5

For Security Applications

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