Split-vector quantization for speech signal involving out-of-sequence regrouping of sub-vectors
US6253173A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 20, 1997 |
| Grant date | Jun 26, 2001 |
| Priority date | — |
| Expiry date | Oct 20, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2019/0005
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for compressing and decompressing an audio signal. The apparatus comprises an input for receiving an audio signal derived from a spoken utterance, the audio signal being contained into a plurality of successive data frames. A data frame holding a certain portion the audio signal is processed to generate a feature vector including a plurality of discrete elements characterizing at least in part the portion of the audio signal encompassed by the frame, the elements being organized in a certain sequence. The apparatus makes use of a compressor unit having a grouping processor for grouping elements of the feature vector into a plurality of sub-vectors on the basis of a certain grouping scheme, at least one of the sub-vectors including a plurality of elements from the feature vector, the plurality of elements being out of sequence relative to the certain sequence. The plurality of sub-vectors are then quantized by applying a vector quantization method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.