A unified approach to scrambling filter design
| Autor: | Ching-An Lin, Chwan-Wen King |
|---|---|
| Rok vydání: | 1995 |
| Předmět: |
Signal processing
ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION Computer Science::Computation and Language (Computational Linguistics and Natural Language and Speech Processing) Filter (signal processing) Frame synchronization Scrambling Filter design Control theory Frequency domain Bandwidth expansion Signal Processing Electrical and Electronic Engineering Algorithm Linear filter Mathematics |
| Zdroj: | IEEE Transactions on Signal Processing. 43:1753-1765 |
| ISSN: | 1053-587X |
| DOI: | 10.1109/78.403334 |
| Popis: | Most speech scrambling systems are either linear periodic filters or can be modeled as such. It is well-known that from an input-output point of view, a periodic filter is equivalent to a multi-input multi-output linear time-invariant system and thus a rational transfer matrix. In this paper, we propose a framework, based on transfer matrices and frequency domain descriptions, for analysis and design of speech scrambling filters. We derive necessary and sufficient conditions for a scrambling system to be insensitive to frame synchronization error. We propose a procedure for the design of scrambling filters that are insensitive to synchronization error and have zero bandwidth expansion. An illustrative design example is given. > |
| Databáze: | OpenAIRE |
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