Quantization noise suppression for encoder/decoder system
US5451954A · kind A · utility
31Cited by
2References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 4, 1993 |
| Grant date | Sep 19, 1995 |
| Priority date | — |
| Expiry date | Aug 4, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/60
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention relates in general to low bit-rate encoding and decoding of information such as audio information. More particularly, the invention relates to the suppression of quantizing noise which results from low bit-rate encoding and decoding of signal events such as transients. An encoder identifies intervals of an input signal in which a decoder is likely to generate audible artifacts caused by quantizing errors. Indications of these intervals are passed in the encoded signal to the decoder. The decoder uses these indications to eliminate quantizing artifacts by suppressing corresponding intervals in the output signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.