Low bit rate transform coder, decoder, and encoder/decoder for high-quality audio
US5230038A · kind A · utility
65Cited by
11References
8Claims
0Family size
Inventors
Key dates
| Filing date | Nov 4, 1991 |
| Grant date | Jul 20, 1993 |
| Priority date | — |
| Expiry date | Nov 4, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/665
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A transform encoder, a transform decoder, and a transform encoder/decoder system utilize complex pre- and post-transform multiplication of input signal samples to implement concurrent application of a modified Discrete Cosine Transform and a modified Discrete Sine Transform according to the Evenly-Stacked Time Domain Aliasing Cancellation technique against two channels of input signal samples, and to reduce the computational complexity of a digital filter bank of a modified Discrete Cosine Transform.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.