Patent ID: 6961850
Filing Date: 2005-11-01
Classification: G10L,G11B

Abstract:
1. An embedded signaling apparatus for embedding data with data medium including audio data, optionally on the data medium, at substantially inaudible levels, said apparatus comprising: a processing device configured to receive code signals, at least one of the code signals including the data to be embedded in the data medium; an adjust gain device operably connected to said processing device, and configured to adjust said code signals, including at least one of the audio data and the data to be embedded; a bit stuffing adder operably connected to said processing device, and configured to transform audio data from a lower bit signal to a higher bit signal; a dither generator operably connected to a dither adder and to a dither subtracter; a dither adder operably connected to said bit stuffing adder, to said adjust gain device and to said dither generator; a dither subtracter operably connected to said dither generator and said dither adder, said dither subtracter configured to receive a composite audio dither signal from said dither adder and to produce a final output signal comprising the audio data and the embedded data, the audio data being substantially audible to a user and the embedded data being substantially inaudible to the user.