SunnyKim

Your comments and feed backs are highly appreciated. Thanks.

As a video surveillance, what kinds of system those gambling houses are currently using? HD IP Camera, HD-SDI, or analog 960H? It seems to me that HD-SDI could be their first choice. But it has a cable length issues. And IP cameras could be the last resort for them, because of IP cameras's time lag when displayed. Any comments would be appreciated.

Good to know. You mean that Grounding is as much important as Voltage supplier, as we experience sewage with our toilet. Clean flushing means clean video.

Those who are promoting HD-CVI, HD-TVI, and AHD claim so called "long distance performance". But that may not be true. My guess it could be on the good quality cable. If you contact to Nextchip.com, they can provide more information, including its cable spec and guide for install.

"A-HD" could be the "AHD" camera and chipset from "Nextchip" in Korea. As the camera signal carrying very high frequency, it can be distorted when transmitted over a long distance cable. The decoder at the receiving side experiences difficulties to lock into the sync (frame start/ line start) of video video frames. That appears as smearing /shaking at the top of video frame. The quality of cable palys very important for using such types of new tech, as AHD, HD-TVI, HD-CVI, HD-SDIs. Please check at Nextchip.com for assistance.

960H camera does not carry such a graphical OSD, shown as a parking slot/or backing up direction guide. The CoDec(H.264 Compression & Decompression), main chip set is responsible for its graphical overlay. Please be noted the CoDec can also be used for applications, automobile black box(recorder). On the navigator screen, we can see such an OSD when we back up our car into the parking slot. The register setting(firmware) of the Codec must be wrong, not properly customized for DVR application. The input port of the DVR may seem to be set to a rear view camera. You can contact its DVR maker.

A big loss to our forum. He was the man I really wish to meet in person asking for his opinion. Be blessed, Carl.

Sounds OK. As the distance between TVs and DVR seems not that large, you can simply split CVBS output signal using a simple signal multiplexer: one CVBS input and two CVBS output going into TVs. You can do the same to audio output signal.

I designed chip sets for these applications. As I can not identify the chipsets on their boards, my answer could be wrong. PCI Bus allows 120 fps as Max bandwidth for D1 sized NTSC video. So 4 Channels of each 30 FPS can be recorded and displayed. PCI -E bus(Lane 1) allows 240 fps for D1 X NTSC, almost double to that of PCI bus. As to PCI -E (single lane), 240 FPS for 8 Channels of D1 sized video, But not for 16 Channels of D1 sized video. Theoretically PCI -E allows 160 FPS of 16 Channels of D1 sized video, that is, 10 FPS each for D1 sized NTSC video. But I noted that they state 60 fps in total, so it could mean 5 FPS for 12 cameras. So your calculation could be right. I do not understand why they would give only 60 FPS???. You may need to buy 2 cards for better displaying rate, as pci-e bus provides independent bandwidth each card. The recording rate could depend on the video frame rate delivered to PC and its pc spec, because its CPU handles compression of video data. You may follow their minimum guide line. But higher spec is much better for stable operation. Can you tell me how much you pay for those cards?

You are right. You need the device driver to be installed. You keep posting the same message till you come across the users of the same board who may provide you the device driver and application program. Or buy the new card to save the cameras. One more note, many of the old card manufacturers are now gone away, before Windows 8 comes up. So the device driver and applications might not be supported under new Windows 8.

Good to know. You saved the card.

Any standalone DVR for H.265, yet? What's video quality, compared to that of H.264?

There could not be delay for HD-CVI processing, itself. The Chipset for HD CVI does not carry any buffers(DRAM memory) to hold and delay. But its front end ISP chipset may carry a dram for 3D noise reduction processing. Or its back end CoDec(say, H.264) must have DRAMs for compressing video data and displaying videos. Meanwhile, audio does not need much delay for processing. In general, audio arrives and plays earlier than video. So a slight delaying of audio can synchronize to video being displayed.

You still have chances to break down the cameras and a rather expensive DVR if you switch to the DVR. PC is a lot more robust than a cheap DVR or PC card. The old PC card could only handle CIF which is a quarter size of D1. So the quality is bad when compared to D1 or 960H's.

If you go for analog system with a solid rg59 cable, 155 meter should not be a challenge.

Cameras are connected to PCI cards via BNC cable (signal and ground). That could be all. No way to drive the current to cameras. But it might happen as long as the cameras and the pci card are connected and the connection to PC would cut off suddenly and no exit to drain out the instantaneous current. The source of current could be electro static by humans or lightening.

If the camera is placed outdoor, it could be hit by Lightening.

The same cable and on the same floor? Completely power off the good ones and check whether the bad one can be improved. This is to check any cross interference when many cables are bundled together. You may also switch the camera input ports of the DVR to check the input impedance matching is correctly done on the input ports of the PCB board.

Waving your hands or walking or running in front camera, you can tell "Frame Drop" which is caused by Loss of Video Sync Signal embedded into HD-CVI. Long Distance is mainly responsible for Losing Sync. Noisy videos could be coming from bad connections or bad quality cables or power shortages. I can say that cheap brand cables do not run through rather strict tests. Too cheap to afford.

If you change into HD System, you have to buy a new DVR. If you go for HD-IP then you have to install LAN cable, POE, and stand alone NVR or NVR software for a dedicated PC.

No way to predict the timing mismatch. There could be chances: Video processor at back end may drop a video frame when it feels a short of processing power to restore the processing power back. So the interval of skipping frame can not be fixed all time. Most of all, the crystals driving audio chip and video chip can be different, even though they are both claiming, say, the same 1 Mhz. But any commercial crystals can have their own PPM numbers, physically drifting all time.

Lip Sync is a tough job. I do not know how the system is composed of what kinds of chip set. The first thing top off my head is to ask IDIS to make a programmable audio buffer delay option. In general, audio and video keeps flowing into the system. If the sampling digitizer (ADC) for audio and video signal is driven by the different clock source (crystal), timing mismatch can be observed in the long run. If the camera chip handles video and audio together, it would be a lot better off. The problem still appears when decoding (playback) audio and video. The decoding video uses different amount of buffer from that of audio. The following is my explanations to your questions. 1. 7 or 8 fps seems to drop frames because the back end processor is not powerful enough of handling 25/30 frames of incoming videos. For 8 cameras, yes, around 60FPS can be recorded. I agree to your math 2. audio can be recorded as pcm, just digitized samples -no compression, as the data amount is relatively smaller than the video data. These can be recorded separately or together, depending on the system makers. Also time stamp for synchronization could be present at the recorded bit stream.

Apology for being offended any bit. HD CVI is for Daihua. HD-TVI is for Intersil and HikVision, basically open to any suppliers. AHD runs the same track. HD SDI keeps lowering price. We all know how terrible Monopoly could be. Why not let them dog fight for lowered price and better quality? The benefit goes for end users, I believe.

http://www.ebay.com/itm/960H-4CH-Video-Capture-Card-for-PC-DVR-960H-960x480-120fps-RT-USA-Seller-KOREA-/121551768145?pt=LH_DefaultDomain_0&hash=item1c4d0cca51 could be your choice.

Are you working for Daihua? There are plenty of HD-SDI, HD-TVI, and HD-AHD systems.