Method of encoding and decoding audio signal using linear predictive coding and encoder and decoder performing the method
US11562757B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 15, 2021 |
| Grant date | Jan 24, 2023 |
| Priority date | — |
| Expiry date | Jul 15, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/032
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An audio signal encoding method performed by an encoder includes identifying a time-domain audio signal in a unit of blocks, quantizing a linear prediction coefficient extracted from a combined block in which a current original block of the audio signal and a previous original block chronologically adjacent to the current original block using frequency-domain linear predictive coding (LPC), generating a temporal envelope by dequantizing the quantized linear prediction coefficient, extracting a residual signal from the combined block based on the temporal envelope, quantizing the residual signal by one of time-domain quantization and frequency-domain quantization, and transforming the quantized residual signal and the quantized linear prediction coefficient into a bitstream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.