Video Signal
Video Signal
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What a cheap way to transmit a video signal from a security camera on the Internet?
We installed security cameras in a position in our company, and have decided it is better to control the flow from a different location. Both sites have high speed Internet through bodem cable and the camera uses a standard RCA video connector. Is there a simple hardware and software solution for the transfer of cargo to be seen in a PC screen in our place? I looked at Slingbox, but I think it may be too much for our situation. Any help would be appreciated.
In fact, all DVR needs is a good Internet connection. http://www.cctvwholesalers.com/?gclid=CKK9mYPw4Y8CFQg1WAodVybkDA several. Run all the cameras to the DVR, allows output to feed the Internet. 4 which will have a couple cameras http://www.cctvwholesalers.com/catalog/1304NET-120fps-4-Camera-MPEG4-DVR-w-Audio--Internet-p-16803.html Clients who use this method and has several advantages over other options. On one hand, that the sessions recorded by the cameras, even if unable to control.
What is Video Encryption?
Video encryption is a very useful method to stop unwanted interception and dissemination of any streaming video or other information, for example, video surveillance of law enforcement is relayed to a central vision Central.
Interference is the easy part. Encryption is the United Nations is difficult, but there are several techniques that are available. However, the human eye is very well, detection of distortions in images due to poor video decoding or poor choice of material encoding video. It is therefore very important to choose the appropriate hardware and video transmissions may be uninsured or can not be decoded video watchable.
Some of the most popular techniques are listed below:
Investment Online:
Method: set or part of the sign of scan lines is reversed.
Advantages: Simple, cheap video coding.
Disadvantages: Poor quality video decoding from the darkness below, low security.
Removal of synchronization:
Method: hide or remove synchronizations horizontal / vertical.
Advantages: Provides a low cost solution for encryption and decryption of the video offers a good quality.
Disadvantages: This method is incompatible with some distribution equipment. The darkness (ie, how easy it is to decipher visual image) is dependent on video content.
Line Shuffle:
Method: Each signal line is re-order on the screen.
Advantages: Provides a video signal compatible with a reasonable amount of obscurity, good decode quality.
Disadvantages: Requires a large amount of digital storage space. There are potential problems with stability video. Less secure than the cut and make rotate encryption method (see below)
Cut & Rotate:
Encoding Method: Each scan line cut into pieces and reassembled in a different order.
Advantages: Provides a compatible video signal, gives an amount of darkness and of excellent quality and decode good stability.
Disadvantages: have the calendar control complex and requires calibration of specialist equipment
The court and the video coding method of rotation is probably the best way to achieve this, reliable and quality video encoding, an example of Successful implementation of this system is in Viewlock II
The application of coding Vice --
The video encoding equipment, Specifically, the decoder should function correctly even if there is a noise (eg with what is commonly known as "snow" on the screen. "Snow" is when there are spots on the television screen often seen in areas of poor reception) or unstable signal. If the link to the encrypted signal should stop working then it should not be a problem. The link between the encoder and decoder video video must be recovered quickly and continued the deciphering.
The nature of systems security camera is that they are often outdoors, and should be able to withstand the harsh climate. The video encryption hardware should be stable under or protected against the effects of rain, sun, heat and cold. It should not be damaged if there is a spike in food. In these systems encoder Video emits a wireless signal to the video decoding unit before it can be seen, must clearly be the case that the act of transmission signal does not work, also encoding video equipment and video encoding hardware should not affect the radio station.
The element Most importantly, the video coding system must be safe, why? It's amazing how some encryption methods can be easily broken. For example, to quantify their stations, some cable TV "channel broadcasts via a fairly complex United Nations, which can be easily decoded by a number of bits of cheap electronics from Radio Shack. This, obviously, would be illegal! The method Cable television encryption is very crude, generally only modify the vertical synchronization signal dynamics, so that your TV may not get a lock on what good and what moves randomly.
The other extreme is to encode the video signal transmission, so it is too costly both in equipment and time for video on the receiver. Remember that this is a video "live" transfer coding followed by a screen 'live' video decryption. Electronics can all be copied given enough time and money, but that this process be as hard as possible is beneficial, because at least delay the time when illegal copies available.
Finally and obviously each user must have a unique encryption key so that other users of the system can not see the video released by accident or purpose without the knowledge of the principal owners. The total number of users possible keys must be such it is very unlikely that someone to guess the correct key.
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