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Devices for encoding and decoding a watermarked signal

  • US 9,767,822 B2
  • Filed: 10/18/2011
  • Issued: 09/19/2017
  • Est. Priority Date: 02/07/2011
  • Status: Active Grant
First Claim
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1. An electronic device, comprising:

  • modeler circuitry, wherein the modeler circuitry is configured to determine parameters based on a first signal and a first-pass coded signal; and

    coder circuitry coupled to the modeler circuitry, wherein the coder circuitry is configured to perform a first-pass coding on a second signal to obtain the first-pass coded signal and to perform a second-pass coding of the second signal based on the parameters to obtain a watermarked signal, wherein the first-pass coding is a first code-excited linear prediction (CELP) coding based on a fixed codebook, wherein the first-pass coding is conducted with no watermark, and the second-pass coding is a second CELP coding based on the fixed codebook with watermarking, and wherein the first signal and the second signal are digital audio signals.

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