Reduced complexity converter SNR calculation
US9208789B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 20, 2014 |
| Grant date | Dec 8, 2015 |
| Priority date | — |
| Expiry date | Apr 22, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/173
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An audio encoder configured to encode an audio signal to generate a bitstream having E-AC-3 format, including by determining a first control parameter indicative of an allocation of available mantissa bits for quantized audio content of the signal. The encoder is configured to perform transcoding simulation to determine a second control parameter in a manner based at least in part on statistical analysis of results of E-AC-3 bit allocation processing of audio data assuming a first target data rate, and of AC-3 bit allocation processing of the data assuming a second target data rate, and to include the second control parameter in the bitstream for use by a converter to convert the bitstream into a second bitstream having AC-3 format at the second target data rate. Other aspects are converters configured to perform transcoding on a bitstream using such a second control parameter, and methods performed by any embodiment of the inventive encoder or converter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.