Videopiratov in the cinema will catch sound.

Scientists succeeded in developing a technology that allows you to calculate in the cinema, which was made illegal filming "ekranki" (CAMRip). Theoretically, this means that after the occurrence of illegal copies on the market will determine where and by whom (knowing the personal information of visitors cinema) specific copy was made. Article researchers published in IEEE Transactions on Multimedia, and her summary of the leading New Scientist.
To apply the new method, scientists propose to make some changes in the soundtrack for the film phase mixing: a special program to "correct" form of sound waves for each sound channel in the cinema.
The various channels in a cinema are on different columns, the location of which are known. Scientists have created a computer program which, using a stochastic model of sound power, that is, a mathematical model taking into account the random factors that can restore to the resulting sound of the location of the microphone, the recording.
Practical Test software showed that the accuracy of determining the location of the microphone is about 0,44 meters. This is quite enough to determine the location in the theater, which sat a pirate. In addition, testing has shown that changes in sound, does not affect the quality of perceived sound.
Despite the effectiveness of new technology, according to the researchers, its practical applications may encounter some difficulties. Principal is collecting personal information about visitors to the cinema, to the resulting number of computer analysis and a number of places could be tied to a specific person.