Method and device for correcting an error in high efficiency coded digital data
US5406632A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 1993 |
| Grant date | Apr 11, 1995 |
| Priority date | — |
| Expiry date | Jul 16, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/005
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and device for correcting an error in digital data in which data of one frame consists of bit assignment data and plural data each consisting of a bit number assigned by the bit assignment data comprises a step of substituting the plural data by noise data when an error has occurred in the bit assignment data. In one aspect of the invention, a method for correcting an error in digital data in which data of one frame consists of bit assignment data and plural data each consisting of exponential data assigned by the bit assignment data and mantissa data of a number of bits assigned by the bit assignment data, comprising a step of correcting the exponential data on the basis of a preceding frame or on the basis of both preceding and subsequent frame and substituting the mantissa data by noise data when an error has occurred in the bit assignment data. The noise data may be band-limited noise. When an irremediable error has occurred in digital data, generation of an extreme noise is prevented and deterioration of a reproduced tone is thereby prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.