Video Recorder Dvr
 |
 4 channel Digital Video Visual Recording DVR PCI Card  US $27.91
|
 4 channels Digital Video Visual Recording DVR PCI Card US $27.20
|
 4 Channel CCTV Digital Video Camera DVR PCI Record Card US $26.00
|
 Apple Mac Elgato Eyehome Digital Video Recorder Eyetv US $19.98
|
Benefits of H.264 Technology for Your Security DVR
Recently, I was asked, "Can Video Security DVR get any better?" Absolutely, and they have! The latest advancements in H.264 compression technology for your security DVRs now deliver the best of both worlds - high quality video and a superb compression ratio. In fact, H.264 compression technology works so well, that many big companies are quickly implementing H.264 technology, including Apple, Intel, Blu-ray, Sony and even Satellite providers such as Direct TV and Dish Network.
Specifically related to security DVRs, here is how H.264 technology benefits you:
Longer record times - As mentioned earlier, H.264 provides superb compression, in most cases more than doubling record times over previously popular compression methods. The advantages of H.264 are impressive! The ability to record longer periods of time on the same sized hard drive will save you money, and greatly increase the amount of video evidence you can archive from your digital video recorder. When recording video on a 160GB hard drive at 30 frames per second with 720 x 480 resolution, H.264 compression produces around 77 hours of recording time. MPEG4 and JPEG2000 compressions only produce 44 and 13 hours, respectively.
Quality and speed does not suffer - Previous compression methods have always allowed you to record excellent picture quality on your digital video recorder at real-time frame rates - but you were eating up valuable hard drive space. Similar to MPEG4, H.264 compression uses predictive technology to drastically reduce the amount of redundant video recorded on your security DVR. In simple terms, instead of constantly recording say a room with no motion, H.264 will use previously recordings images. However, if someone walks into the room, H.264 will record that person and continue to use the previously recorded background. H.264 will sample up to 32 frames of video to ensure complete accuracy and quality - whereas other compression methods would use only 1 or 2 frames as a reference.
Improved remote monitoring - Saving hard drive space is not the only benefit of H.264. The ability to bring together high quality and low memory sizes allows for seamless presentations of video when transmitted. Coupled with low frame rate recordings, previous compressions made watching video from remote video security DVR units a trying experience - especially when activities in question happened fast. Video would be jumpy, and audio (if used) wasn’t likely to be synchronized with the video. Watching real-time H.264 is a completely different experience, and the reason so many broadcast companies around the globe have rapidly adopted it.
A word of caution - Although H.264 compression is without question a giant leap in video technology for all industries, but just having that feature in a digital video recorder does not mean that it’s a good DVR. To make all the magic happen, it takes more processing horsepower. So be sure to use a manufacturer with a proven track record, who stands behind their products, and one who will be there for you should you need a hand.
why do digital video recorders- dvr's and old vcr's need a built in tuner ?
Can't signals be recorded directly from the TV-tuner?
Seems redundant doesn't it?
For the first Question, DVR's and VCR's alike, need to have a tuner because, a "tuner" is nothing more than a signal processor. Also, tuners are built specifically for their intended frequency range. For example, FM tuner, television tuner, and Satellite tuner's all will decode/process, their specific frequency range. DVR's and VCR's need to have a tuner to take that signal and convert it into picture and sound. For the second question, if your tv had the ability to decode signal and then loop out picture and sound, theoretically, you could then record that to a DVR or VCR. Some TVS will have A/V out however, that is only base band video/audio and does not have an "RF" carrier meaning a tuner is unused.
RE3 2.5" LCD Screen Car Video Recorder DVR HD 720P @ Sunny Day Demo by securonic
You can follow any responses to this entry through the RSS 2.0 feed. Both comments and pings are currently closed.
Comments are closed.