Methods and Apparatus for Audio Watermarking a Substantially Silent Media Content Presentation

摘要

Methods and apparatus for audio watermarking a substantially silent media content presentation are disclosed. An example method to audio watermark a 5 media content presentation disclosed herein comprises obtaining a watermarked noise signal comprising a watermark and a noise signal having energy substantially concentrated in an audible frequency band, the watermarked noise signal attenuated to be substantially inaudible without combining with a separate audio signal, associating the watermarked noise 10 signal with a substantially silent content component of the media content presentation, the media content presentation comprising one or more media content components, and outputting the watermarked noise signal during presentation of the substantially silent content component. 18/0312011, SAW103759.spc, Abstract 600 BEGIN WATEMARKED NOISE PRESENTATION - DETERMINE MEDIA CONTENT COMPONENT(S) TO BE PRESENTED CONTENT PRESENTATION SUBSTANTIALLY SILENT? FOR EACH MEDIA CONTENT COMPONENT TO BE PRESENTED L CONTENT COMPONENT ASSOCIATED WITH WATERMARKED NOSE SIGNAL? YES -630 OBTAIN ASSOCIATED WATERMARKED NOISE SIGNAL SZ- 635 COMBINE WATERMARKED NOISE SIGNAL WITH OVERALL AUDIO SIGNAL TO BE OUTPUT N 04ALL MEDIA CONTENT COMPONENT(S) EXAMINED? YES C-645 OUTPUT OVERALL AUDIO SIGNAL CONTAINING COMBINED WATERMARKED NOISE SIGNALS) (E.G., EVEN WHEN NO AUDIO CONTENTSTOBE OUTPUT) COMBINE OVERALL AUDIO SIGNAL WITH AUDIO CONTENT TO BE OUTPUT (IF PRESENT) -650 YES CONTINUE? (END WATEMARKED NOISE PRESENTATION)