Lossless embedded additional data
US9870777B2 · kind B2 · utility
0Cited by
4References
25Claims
0Family size
Inventors
Key dates
| Filing date | Oct 24, 2012 |
| Grant date | Jan 16, 2018 |
| Priority date | — |
| Expiry date | Jun 27, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2020/10546
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Methods are disclosed for an encoder to embed a data stream into a quantized PCM digital audio signal and for a corresponding decoder to both retrieve the data stream and losslessly reconstruct the exact original audio. Some methods employ complimentary amplification and attenuation, while others employ gain redistribution. Pre-emphasis and soft clipping techniques are described as methods of losslessly reducing the peak excursion of the PCM audio signal. Also described is the lossless placing of data at predetermined positions within an audio stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.