×

Audio encoding to convey auxiliary information, and decoding of same

  • US 7,987,094 B2
  • Filed: 02/20/2007
  • Issued: 07/26/2011
  • Est. Priority Date: 11/18/1993
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method of embedding auxiliary information in data representing audio, the method comprising:

  • altering, using a processor of a computing device, data representing audio to include a sequence of bits of auxiliary information, wherein the altering is based on a carrier signal and a local gain that varies within the data representing the audio, wherein the sequence of bits of auxiliary information includes at least one fixed registration sequence for registration of the auxiliary information within the data representing the audio and at least one message sequence, wherein the fixed registration sequence and the at least one message sequence are interleaved in at least a portion of the data, and wherein the fixed registration sequence is provided in the data so as to allow determination of threshold levels associated with the auxiliary information; and

    repeating the altering of the data to include redundant instances of at least a portion of the auxiliary information that includes the fixed registration sequence.

View all claims
  • 6 Assignments
Timeline View
Assignment View
    ×
    ×