Doubly compatible lossless audio bandwidth extension
US9548055B2 · kind B2 · utility
0Cited by
2References
25Claims
0Family size
Inventors
Key dates
| Filing date | Jun 12, 2013 |
| Grant date | Jan 17, 2017 |
| Priority date | — |
| Expiry date | Aug 27, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/24
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An encoder for digital audio signals at a higher sample rate creates a stream for consumer distribution at a lower sampling rate, with compatibility for standard PCM players without a decoder. In conjunction with a suitable decoder, two enhanced playback options are supported, the first option allowing full lossless reconstruction of a noise-shaped higher sampling rate signal, the second option allowing lossy bandwidth extension even if an intervening transmission chain has truncated the least-significant-bits of the encoder's output signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.