Audio with hidden in-band digital data
First Claim
1. In a method of processing audio to hide N-bits of embedded information in sampled audio data corresponding to audible information, N being at least two, each sample having a value, an improvement wherein each of plural of said samples has a value that is a function of plural bits of said N-bits of embedded information.
6 Assignments
0 Petitions
Accused Products
Abstract
Digital audio data is processed to convey plural bits of hidden auxiliary data. The auxiliary data can be used for identification purposes, for device control (disabling recording and the like), etc. The claimed arrangement uses a data embedding technique characterized in that the values of single samples of the audio data are each influenced by the values of several of the bits of auxiliary data. A great variety of other techniques and applications are also detailed.
391 Citations
15 Claims
- 1. In a method of processing audio to hide N-bits of embedded information in sampled audio data corresponding to audible information, N being at least two, each sample having a value, an improvement wherein each of plural of said samples has a value that is a function of plural bits of said N-bits of embedded information.
- 9. In a method of processing sampled audio data to hide N-bits of embedded information therein, N being at least two, each sample having a value, an improvement wherein each of plural of said samples has a value that is a function of plural bits of said N-bits of embedded information.
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15. A method of encoding a set of input audio data with at least first and second symbols of auxiliary data to be hidden therein, the audio data comprising audio samples, each having a value, characterized in that there exists at least one sample whose value after encoding is influenced by the first symbol, and is also influenced by the second symbol.
Specification