BNC 575 Series Bedienungsanleitung PDF herunterladen (Seite 2)

More Than Just a Synchronizer

Equally suited for use in analog, digital or hybrid facilities, the DPS-475

and DPS-575 Multi-Function Analog/Digital AV Synchronizers repre-

sent the ideal choice for broadcasters making the transition to DTV.

Available in video only and audio/video configurations, these synchro-

nizers provide an ideal bridge from analog video signals, such as satel-

lite and microwave feeds, to digital production facilities. The DPS-475

is an NTSC only product while the DPS-575 is an auto-sensing dual

standard (PAL/NTSC) device.

A host of innovative features, options and modes support the follow-

ing functions: AV Synchronizer, Animated Logo Inserter, Linear Keyer,

Auto Switch Time Base Corrector, Graphics Framestore, Bi-Directional

Analog/Digital Transcoder, DV Transcoder, Digital Noise Reduction

System, Video AGC, Video Test Signal Generator, Audio Test Signal

Generator, VITS Inserter, Video Bandwidth Processor and Serial Digital

Audio Embedder/De-Embedder.

Infinitely Flexible I/O

Unlike competitive products that share I/O connectors, DPS synchro-

nizers provide separate connections for all video input and output for-

mats. This enables convenient front panel selection between multiple

input devices, all of which may be connected simultaneously. Four

video input and output formats are standard: Composite Video, Serial

Digital Video (SDI), Component Analog Video (Betacam) and Y/C (S-

VHS/Hi-8). A separate RGB output supports sync on green or RGBS

modes and is ideal for driving video projectors. The RGB output can

also be configured to provide an additional composite video output.

An optional DV I/O module makes it easy to interface DV camcorders

and 1394 equipped digital VCRs. As an added convenience, front panel

transport controls, including jog and shuttle, make it easy to control

DV devices via the 1394 link.

Tradition of Innovation

When it comes to synchronizers, DPS can demonstrate a long history

of innovation. Our first product, the DPS-1, was introduced over twen-

ty-five years ago. As broadcasters began to build new digital facilities,

DPS introduced the DPS-465, the industry’s first multi-format serial

digital transcoding synchronizer. The DPS-465 made it easy and eco-

nomical to interface a wide variety of analog and digital video sources

to a digital plant. The DPS-465 was followed by the DPS-470, which

incorporated an internal four channel digital audio synchronizer and

quickly became the top choice of networks, broadcasters and mobile

operators throughout the world.The DPS-475 and DPS-575 multi-func-

tion synchronizers continue this rich heritage of technical excellence,

reliability and value.

Proprietary 12-Bit Comb Filter Decoder

The most critical requirement for a component digital synchronizer is

the ability to accurately decode composite NTSC or PAL signals. In that

respect, the 12-bit adaptive 3-dimensional comb filter decoder used in

the DPS-475 and DPS-575 offers unparalleled decoding ability. Three

combing modes are available: Simple, Adaptive-2D and Adaptive-3D.

3D combing utilizes a proprietary DPS processing algorithm to com-

bine information from previous frames in order to eliminate residual

subcarrier artifacts, such as cross luminance and cross chroma. 3D pro-

cessing can be engaged even when the composite input is not being

utilized. For example, if a component video source was originally

decoded by a less sophisticated tape machine decoder, the 3D comb

filter in the DPS-475 and DPS-575 can be used to clean up the signal

and remove the cross luminance and chroma artifacts. Removing

these artifacts will save bandwidth if you encode the output to MPEG,

because the residual subcarrier artifacts create significant entropy.

Another unique feature broadcasters will appreciate is programmable

line-by-line vertical interval comb filter bypass.

Proprietary 12-Bit Video Encoder

The DPS-475 and DPS-575 also incorporate a proprietary 12-bit video

encoder. This wideband digital oversampling design provides ultra flat

frequency response and extremely high quality encoding for both

NTSC and PAL with exceptional signal-to-noise performance.

Testing, Testing, TSG

Over thirty 10-bit video test patterns, including zone plate, can be

loaded from non-volatile memory into the synchronizer’s graphic dis-

play buffer and bounce can be specified between any two test pat-

terns. An integrated VITS inserter enables selected test signals to be

displayed in the vertical blanking interval. It’s also possible to insert a

short text message, such as source I.D. information, into the VBI. When

input video is lost, the synchronizer can be programmed to freeze, fade

to black or drop to a user-defined trouble slide or test pattern.

3-Dimensional Digital Noise Reduction

Sophisticated digital noise reduction is standard with the DPS-475 and

DPS-575. Convenient front panel controls provide for the independent

adjustment of spatial and temporal noise reduction. Spatial noise

reduction is effective at removing impulse type noise. Both luminance

and chrominance temporal noise reduction are available.

The Right Choice

for Broadcasters

Transitioning to DTV

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