Successively refinable Trellis-Based Scalar Vector quantizers
US6504877B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 14, 1999 |
| Grant date | Jan 7, 2003 |
| Priority date | — |
| Expiry date | Dec 14, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T9/008
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Methods of designing successively refinable Trellis-Based Scalar-Vector quantizers (TB-SVQ) include a multi-stage process wherein a TB-SVQ is applied to a set of digital data to set up a codebook boundary and to obtain a non-uniform density gain for a constellation in which the data signals will be encoded. In at least one more stage, a Trellis coded quantizer (TCQ) is applied to the output codebook boundary of the first stage to obtain a granular or shaping gain of 1.53 dB. The inventive methods successively refine the TB-SVQ so that robust signal transmission is achieved. By applying a multi-stage process wherein a TB-SVQ is utilized in the first stage and a TCQ is utilized in the second and successive stages, the computational complexity and time for encoding the constellation are greatly reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.