Multi-path trellis coded quantization method and multi-path coded quantizer using the same
US8706481B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 2006 |
| Grant date | Apr 22, 2014 |
| Priority date | — |
| Expiry date | Nov 26, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/032
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method of multi-path trellis coded quantization (TCQ) usable in a speech coding system, and a quantizer using the method. Specifically the method includes calculating accumulated distortions corresponding to 2N survivor paths, wherein N indicates an integer greater than two, each of the 2N survivor paths is going towards one of nodes at an i th stage of a trellis, and i indicates an integer greater than zero, comparing the accumulated distortions respectively corresponding to the 2N survivor paths to select N paths among the 2N survivor paths, wherein the accumulated distortions corresponding to selected N paths are smaller than the accumulated distortions corresponding to unselected N paths establishing the selected N paths as survivor paths going toward an i+1 th stage, and selecting an optimal path among the 2N survivor paths corresponding to each node of a last stage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.