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Which DVR provides the BEST internet viewing quality?
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| slekkas |
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Posts: 4
Joined: 17 Dec 2008
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Posted: Wed Dec 17, 2008 2:30 pm
Post subject: Which DVR provides the BEST internet viewing quality?
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I would like to know with DVR is best to watch live feed from remote locations through the internet. I would like something similar to the Geovision GV-800 DVR Card witch i've tried and i'm very happy with the results.
Thanks
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| jasmilelv |
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Posts: 67
Joined: 23 Jan 2008
Location: Shenzhen, China
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Posted: Thu Dec 18, 2008 10:20 pm
Post subject: you can check ours
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you have to check.
pls tell me if you like to check our dvr, I will let our technician build internet access according to your reply. 
_________________
Sell to USA
www.tmvideo.cn
We are a manufacturer of Standalone DVR.
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| iFCS_GUY |
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Posts: 3
Joined: 22 Dec 2008
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Posted: Mon Dec 22, 2008 1:01 am
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err, most provide fairly decent images over the internet.
budget would be a nice thing to know, but, coming in under the geovision card in price, there's a lot to be had!
embedded 4 channel units like the iFCS LITE 4 CIF unit, or the PACOM's do nice remote viewing,
DM's stuff is a lot more expensive, but, also scales a lot better too!
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| blowrabbit |
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Posts: 248
Joined: 29 May 2005
Location: seattle, wa.
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Posted: Tue Dec 23, 2008 7:36 am
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| InNorthernWeTrust |
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Posts: 100
Joined: 25 Jul 2007
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Posted: Tue Dec 23, 2008 6:06 pm
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If you have the budget, the Nuvico Apex series dynamicaly scales the resolution of the images being transmitted to the images being viewed which greatly reduces network bandwidth for the smoothest remote video.
I.e. if you looking at a 16 camera screen it is transmitting 16 QCIF images, if you bring up 1 camera it immediately starts transmitting only that one image at D1 resolution.
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| normicgander |
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Posts: 196
Joined: 23 Nov 2005
Location: Northern Michigan
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Posted: Tue Dec 23, 2008 9:48 pm
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For remote LAN/WAN viewing, TeleEye video recording servers are decent. Multil channel processing.
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| cctvexpert |
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Posts: 117
Joined: 28 May 2004
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Posted: Sun Jan 11, 2009 8:55 am
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since the magazine publishers will never suggest anything that would hurt their advertisers maybe we should set something up where we can compare all these manufacturers recorded as well as remote viewing quality.
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| CCTV_queer |
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Posts: 17
Joined: 13 Jan 2009
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Posted: Tue Jan 13, 2009 11:30 pm
Post subject:
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| InNorthernWeTrust wrote: |
If you have the budget, the Nuvico Apex series dynamicaly scales the resolution of the images being transmitted to the images being viewed which greatly reduces network bandwidth for the smoothest remote video.
I.e. if you looking at a 16 camera screen it is transmitting 16 QCIF images, if you bring up 1 camera it immediately starts transmitting only that one image at D1 resolution. |
Couldn't agree more! NUVICO Apex kicks ass... AND starting in Feb 2009, it's HYBRID!
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| cctvexpert |
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Posts: 117
Joined: 28 May 2004
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Posted: Tue Jan 13, 2009 11:40 pm
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H264 is by far the best solution especially now with the latest profile of scalable video coding. Nuvico is a good machine but an older codec.
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| InNorthernWeTrust |
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Posts: 100
Joined: 25 Jul 2007
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Posted: Wed Jan 14, 2009 6:19 pm
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| cctvexpert wrote: |
| H264 is by far the best solution especially now with the latest profile of scalable video coding. Nuvico is a good machine but an older codec. |
H.264(if using the correct type as there are many flavors of H.264) is indeed a better version of MPEG-4. However, the APEX series scales the resolution of all cameras based only on what is currently being viewed, and will still provide better remote viewing. Basically, the APEX is never transmitting more than 720x480 at a time - whether viewing 1 camera or 16 camera. That provides such a dramatic reduction of bandwidth that really nothing else compares.
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| cctvexpert |
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Posts: 117
Joined: 28 May 2004
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Posted: Mon Jan 19, 2009 8:34 am
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264 is the best because it uses variable bit rates and only sends the changing frames down when necessary depending upon the configuration of the I, B, P frames.
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| InNorthernWeTrust |
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Posts: 100
Joined: 25 Jul 2007
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Posted: Mon Jan 19, 2009 12:02 pm
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Correct - though MPEG4 uses the same premise(H.264 is the latest version of MPEG-4. It is also known as MPEG-4 Part 10.). No argument there, H.264 is a smaller file size. The reason the Nuvico will outperform nearly any DVR on the market is because of how the DVR transmits(the scalable resolution I mentioned previously.), NOT because of the codec. The Apex series can transmit 16 cameras using (in theory) a 1/16 of the bandwidth required by other DVRs. H.264 definitly does not make up that much difference.
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| cctvexpert |
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Posts: 117
Joined: 28 May 2004
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Posted: Mon Jan 19, 2009 11:41 pm
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i hate to differ with you but dont confuse MPEG4 with H264 they are not related. The motion picture experts group calls it MPEG4 part 10 and the internation telecommunications union calls it H264 they should not be confused with mpeg4 part 2. Completely different profiles and architecture. 264 is a complex codec. MPEG4 part 2 does not have
slice based based prediction
arithmetic algorithm
deblocking filters
use of multiple reference frames
interlace management
weighted prediction
and it goes on:
264 goes down to 4 x 4 blocks
mpeg4 16 x 16
mpeg4 uses huffman algorithm vs arithmetic for 264
they are not even similar in their profile characteristics.
transmission with simple codecs cannot be managed. Its the DSP which has substream capabilities which controls the data flow.
In the end seeing is believing. If it does what you say then fine.
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| G22 |
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Posts: 803
Joined: 21 Mar 2005
Location: Ontario, Kanada
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Posted: Wed Jan 21, 2009 12:16 am
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Anyone know what video format the Panasonic WJ-HD316 (A and non-A versions) DVR uses?
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| InNorthernWeTrust |
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Posts: 100
Joined: 25 Jul 2007
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Posted: Wed Jan 21, 2009 11:56 am
Post subject:
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