Devices for encoding and decoding a watermarked signal
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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Abstract
An electronic device configured for encoding a watermarked signal is described. The electronic device includes modeler circuitry. The modeler circuitry determines parameters based on a first signal and a first-pass coded signal. The electronic device also includes coder circuitry coupled to the modeler circuitry. The coder circuitry performs a first-pass coding on a second signal to obtain the first-pass coded signal and performs a second-pass coding based on the parameters to obtain a watermarked signal.
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Citations
44 Claims
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1. An electronic device, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An electronic device, comprising:
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modeler circuitry configured to produce a decoded first signal based on a decoded second signal and a watermarked bitstream, wherein the watermarked bitstream comprises second-pass coding, wherein the second-pass coding is a second code-excited linear prediction (CELP) coding based on a fixed codebook with watermarking subsequent to a first-pass coding that comprises a first CELP coding based on the fixed codebook, wherein the first-pass coding is conducted with no watermark; and decoder circuitry coupled to the modeler circuitry, wherein the decoder circuitry is configured to provide the decoded second signal based on the watermarked bitstream, and wherein the decoded first signal and the decoded second signal are digital audio signals. - View Dependent Claims (12, 13, 14)
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15. A method for encoding a watermarked signal on an electronic device, comprising:
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obtaining a first signal and a second signal; performing a first-pass coding on the second signal to obtain a first-pass coded 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; determining parameters based on the first signal and the first-pass coded signal; and performing a second-pass coding of the second signal based on the parameters to obtain a watermarked signal, wherein 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. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method for decoding a watermarked signal on an electronic device, comprising:
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decoding a watermarked bitstream to obtain a decoded second signal; and decoding the watermarked bitstream based on the decoded second signal to obtain a decoded first signal, wherein the decoded first signal and the decoded second signal are digital audio signals, and wherein the watermarked bitstream comprises second-pass coding, wherein the second-pass coding is a second code-excited linear prediction (CELP) coding based on a fixed codebook with watermarking subsequent to a first-pass coding that comprises a first CELP coding based on the fixed codebook, wherein the first-pass coding is conducted with no watermark. - View Dependent Claims (26, 27, 28)
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29. A computer-program product for encoding a watermarked signal, comprising a non-transitory tangible computer-readable medium having instructions thereon, the instructions comprising:
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code for causing an electronic device to obtain a first signal and a second signal; code for causing the electronic device to perform a first-pass coding on the second signal to obtain a first-pass coded 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; code for causing the electronic device to determine parameters based on the first signal and the first-pass coded signal; and code for causing the electronic device to perform a second-pass coding of the second signal based on the parameters to obtain a watermarked signal, wherein 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. - View Dependent Claims (30, 31, 32, 33)
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34. A computer-program product for decoding a watermarked signal, comprising a non-transitory tangible computer-readable medium having instructions thereon, the instructions comprising:
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code for causing an electronic device to decode a watermarked bitstream to obtain a decoded second signal; and code for causing the electronic device to decode the watermarked bitstream based on the decoded second signal to obtain a decoded first signal, wherein the decoded first signal and the decoded second signal are digital audio signals, and wherein the watermarked bitstream comprises second-pass coding, wherein the second-pass coding is a second code-excited linear prediction (CELP) coding based on a fixed codebook with watermarking subsequent to a first-pass coding that comprises a first CELP coding based on the fixed codebook, wherein the first-pass coding is conducted with no watermark. - View Dependent Claims (35, 36)
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37. An apparatus for encoding a watermarked signal, comprising:
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means for obtaining a first signal and a second signal; means for performing a first-pass coding on the second signal to obtain a first-pass coded 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; means for determining parameters based on the first signal and the first-pass coded signal; and means for performing a second-pass coding of the second signal based on the parameters to obtain a watermarked signal, wherein 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. - View Dependent Claims (38, 39, 40, 41)
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42. An apparatus for decoding a watermarked signal, comprising:
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a second means for decoding a watermarked bitstream to obtain a decoded second signal; and a first means for decoding the watermarked bitstream based on the decoded second signal to obtain a decoded first signal, wherein the decoded first signal and the decoded second signal are digital audio signals, and wherein the watermarked bitstream comprises second-pass coding, wherein the second-pass coding is a second code-excited linear prediction (CELP) coding based on a fixed codebook with watermarking subsequent to a first-pass coding that comprises a first CELP coding based on the fixed codebook, wherein the first-pass coding is conducted with no watermark. - View Dependent Claims (43, 44)
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Specification