Vista QP16 series Manual de usuario descargar pdf (Pagina 4)

16 Channel DVRs

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quality is good. Colour replication is also

accurate.

Dropping the quality to level 6 doesn’t

introduce much in the way of artefacts, but you

do know you are looking at an MPEG-4 image,

as it has that very slight shimmer on edges and

in plain areas. At Level 4 you can see evidence

of compression, and below that artefacting is

obvious.

With the resolution at 2CIF, the lower quality

settings are only good for general observation.

In CIF mode, the unit shows its age, as it

displays the image at quarter screen size.

Samsung SRD-1670DP

The SRD-1670DP from Samsung is billed as a

real-time DVR, and supports up to 16 video

inputs with loop-throughs via BNC. The main

video output is via BNC, VGA or HDMI. There

are four spot monitor outputs using BNC.

The unit has some serious processing power.

It also offers a high level of flexibility, featuring

10/100/1000 LAN connectivity, alongside RS-

485 and RS-232 data connectivity. The unit also

features three USB ports and two external SATA

ports. Two of the USB ports are conveniently

located on the front of the unit, with one on the

rear panel.

The DVR supports two-way audio with 16

inputs and 1 output. The inputs are handled by

way of four phono sockets, with the remaining

inputs connected via a D-Sub socket. The audio

output is also phono. The unit also boasts 16

alarm inputs and 4 alarm outputs. A DVD

rewriter is included.

The DVR uses the now almost standard

H.264 compression algorithm for recorded

video. Available resolutions are 704 x 576, 704

x 288 or 352 x 288. Record rate is 400fps. Now

for the good news; it’s 400fps at all resolutions,

so this truly is a real-time DVR!

The SRD-1670DP has a clean and simple

fascia. The left hand side is home to the DVD

rewriter, while the centre of the unit includes a

jog/shuttle dial with a blue LED ring. It’s a small

touch, but it does give a quality feel, and end

users like that. Consumer brands don’t spend a

fortune on such touches for nothing, so it’s

good to see security products following suite.

There are two main blocks of buttons. The

first is the 16 channel select buttons, and the

second includes general control and playback,

as well as a touchpad for menu navigation.

The recorder is supplied with a manual. It is

fairly well written and covers most of what you’ll

need to know. There is also a mouse included,

and an infrared remote control unit, as well as

SATA connection leads for external devices.

The menu structure is straightforward. It

differs from the traditional Samsung menus

we’ve seen in the past, but before you wonder

why they’d change it, the good news is that it’s

better! Navigation is clear and easy, and the

settings are simple to control. Inputs are

individually configurable, and you do have to

set each one. Thankfully, when it comes to

setting schedules, you can apply global

changes, which made the configuration very

quick. Additional functionality such as alarm

handling, motion detection and search facilities

are simple and work well.

Video quality has eight settings; thankfully

Samsung has had the good sense to not try and

come up with 8 descriptions. Instead they vary

from Level 1 (lowest) to Level 8 (highest). The

only anomaly is that the machine offers 4CIF,

2CIF and CIF resolutions, but the menu refers to

them as D1, Half D1 and CIF. It’s not an issue as

the specification sheets are very clear about

what you actually get!

At Level 8 in 4CIF mode, the image quality is

excellent. Indeed, many would be hard-pressed

to differentiate it from a live input. Being able

to record in real time across the board might

have an impact on storage capacity, and

installers offering the highest quality could

need to fill the unit’s five HDD slots, but if

you’re after real time, video, it’s worth it!

Dropping to Level 5 in 4CIF doesn’t show

much deterioration, and Level 3 only shows

signs of compression in bland areas of tone.

Even at Level 1, identification is still possible,

and we have seen worse images from some

DVRs on their so-called high quality settings.

Obviously, dropping to CIF resolution does

have a slight impact, but nowhere near as much

as you might expect. At Level 8 the images are

similar to what you’d expect from a decent 4CIF

MPEG-4 images, and for a CIF resolution that

shows that the H.264 implementation has been

done with care. At around Level 4 compression

is obvious, but not to the degree that it renders

the image unusable. Even at Level 1, you are

getting images that are more than good enough

for general surveillance!

Vista QP16

Vista’s QP16 is part of the Quantum Plus range.

It’s a 16 channel unit, with inputs and loop

throughs via BNC. Video outputs are main and

spot via BNC, and there are also VGA and S-

Video connections.

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