Down-mixing compensation for audio watermarking
AssigneeThe Nielsen Company (US), LLC
InventorsVenugopal Srinivasan, Alexander Topchy
Life of this patent
Estimating the term…
Abstract
Example methods, apparatus, systems and articles of manufacture to implement down-mixing compensation for audio watermarking are disclosed. Example watermark embedding methods disclosed herein include determining respective attenuation factors for a plurality of audio bands based on energy values associated with down-mixed audio samples corresponding to a first audio channel of a multi-channel audio signal and a second audio channel of the multi-channel audio signal. Disclosed example watermark embedding methods also include embedding a watermark in audio samples of the first audio channel based on the attenuation factors.
Claims20
A watermark embedding method comprising:
- determining, with a processor, respective attenuation factors for a plurality of audio bands based on energy values associated with down-mixed audio samples corresponding to a first audio channel of a multi-channel audio signal and a second audio channel of the multi-channel audio signal;
- and
- embedding a watermark in audio samples of the first audio channel based on the attenuation factors.
A tangible computer readable storage medium comprising computer readable instructions which, when executed, cause a processor to at least:
- determine respective attenuation factors for a plurality of audio bands based on energy values associated with down-mixed audio samples corresponding to a first audio channel of a multi-channel audio signal and a second audio channel of the multi-channel audio signal;
- and
- embed a watermark in audio samples of the first audio channel based on the attenuation factors.
A watermarking apparatus comprising:
- a watermark compensator to determine respective attenuation factors for a plurality of audio bands based on energy values associated with down-mixed audio samples corresponding to a first audio channel of a multi-channel audio signal and a second audio channel of the multi-channel audio signal;
- and
- a watermark embedder to embed a watermark in audio samples of the first audio channel based on the attenuation factors
Dependencies are inferred from the claim text.