Patent ID: 8116462

Claim:
A method of real-time identification of at least one audiovisual advertisement in a data stream which comprises at least one audio stream with an energy, wherein said method comprises: periodically checking if there is an energy drop in the energy of the at least one audio stream; if an energy drop is detected in an instant, computing a measurement of similarity between a segment of the audio stream of a predefined length starting at the instant in which the energy drop is detected and a segment of audio of the predefined length corresponding to the beginning of the at least one audiovisual advertisement; if the measurement of similarity is above a predefined threshold, identifying the instant in which the energy drop is detected as a start point of the at least one advertisement in the data stream; and wherein the step of periodically checking if there is an energy drop, further comprises: measuring a mean energy of each of a plurality of windows of the audio stream; measuring a ratio by dividing the minimum mean energy of a window by the average mean energy of all the windows; if the ratio is lower than an activation threshold, detecting the window with the minimum mean energy as an energy drop.