Speech pattern compression arrangement utilizing speech event identification
US4764963A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 12, 1987 |
| Grant date | Aug 16, 1988 |
| Priority date | — |
| Expiry date | Jan 12, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
There are disclosed speech encoding methods and arrangements, including among others a speech synthesizer that reproduces speech from the encoded speech signals. These methods and arrangements employ a reduced bandwidth encoding of speech for which the bandwidth more nearly than in prior arrangements approaches that of the rate of occurrences of the individual sounds (equivalently, the articulatory movements) of the speech by locating the centroid of the individual sound, for example, by employing the zero crossing of a single (v(L)) representing the timing of individual sounds, which is derived from a .phi. signal which is itself produced from prescribed linear combination of acoustic feature signals, such as log area parameter signals. Each individual sound is encoded at a rate corresponding to its bandwidth. Accuracy is ensured by generating each individual sound signal from the linear combinations of acoustic feature signals for many times frames including the time frame of the centroid. The bandwidth reduction is associated with the spreading of the encoded signal over many time frames including the time frame of the centroid. The centroid of an individual sound is within a ce…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.