Visual figuring is an extremely useful method for the transmitted nondesired interception and the viewing of stop of any video or any other information, for example of a visual monitoring of police force being transmitted by relay again to a central center of viewing.
Jamming is the easy partition. It is the UNO-figuring which ’s hard, but there are several techniques which are available. However, the human eye is very good with, locating deformations in the images due to the poor decoding of video or the poor choice of the material of jamming of video. Consequently, it is very important to choose the right material or your visual transmissions can be UNO-blocked or your video decoded can not be regardable.
Some of the more popular techniques are detailed below:
Line Inversion:
Method: Whole or parts of the signal scan lines are inverted.
Advantages: Simple, cheap video encryption.
Disadvantages: Poor video decrypting quality, low obscurity, low security.
Sync Suppression:
Method: Hide/remove the horizontal/vertical line syncs.
Advantages: Provides a low cost solution to Encryption and provides good quality video decoding.
Disadvantages: This method is incompatible with some distribution equipment. Obscurity (i.e. how easy it is to visually decipher the image) is dependant on video content.