Digital signal encoding method, decoding method, encoding device, decoding device, digital signal encoding program, and decoding program
US7599835B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 10, 2003 |
| Grant date | Oct 6, 2009 |
| Priority date | — |
| Expiry date | Mar 6, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A down sampler 13 down samples a digital signal in the sampling frequency thereof from 96 kHz to 48 kHz on a frame-by-frame basis. The converted signal is compression encoded and output as a main code Im. An up sampler 16 converts a partial signal corresponding to the main code Im to a signal having the original sampling frequency 96 kHz, for example. An error signal between the up sampled signal and an input digital signal is generated. An array converting and encoding unit 18 array converts bits of sample chains of the error signal, thereby outputting an error code Pe. On a decoding side, a high fidelity reproduced signal is obtained based on the main code Im and the error code Pe, or a reproduced signal is obtained based on the main code Im only.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.