Patent ID: 8738382

Claim:
A personal video recorder audio filter method comprising: receiving program content at a program content receiving component that forwards the program content to a program content feedback separator and to an audio emitter; receiving environmental audio patterns at a microphone wherein, upon an annunciation of the received program content by the audio emitter, the received environmental audio patterns comprise a feedback of an annunciated instance of the program content and wherein the received audio patterns are forwarded to the program content feedback separator; separating a component of a portion of the received program content from a corresponding portion of the received environmental audio patterns, wherein the separating comprises: compensating for a delay between the feedback of a portion of the annunciated program content instance and by time shifting a stored un-annunciated instance of the program content portion; subtracting information corresponding to the time shifted un-annunciated program content portion component from the received environmental audio patterns; and adjusting an amplitude of the program content; performing voice recognition on a remainder of the environment audio patterns after the subtraction, wherein the voice recognition is performed independent of the subtracted program content portion; and upon detecting, based on the performing the voice recognition, that the remainder environment audio patterns comprise at least one control command related audio pattern, executing one or more control commands corresponding to the control command related audio pattern; wherein said program content feedback separation component stops one or more false commands, which correspond to at least an element of said program content, when user commands are not being issued.