Method for signal processing
US4672667A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 2, 1983 |
| Grant date | Jun 9, 1987 |
| Priority date | — |
| Expiry date | Jun 2, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L15/24
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for processing a signal to extract selected information therefrom is provided. According to the method, an input signal is converted into a sequence of data samples, and these data samples are applied sequentially through a convolver having first and second sections, the output of the first section forming the input of the second section. A data sample in the second convolver section is then compared to each data sample in the first convolver section to produce an output signal of a plurality of data points, each of the data points representative of a midpoint position within the convolver between a pair of compared data samples. This comparison step is repeated for each data sample in the second convolver section and the output signals form a histogram from which the selected information is extracted. This method may be advantageously utilized in a speech recognition process for extracting various features from an input speech signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.