We propose an adaptive short-term postfilter for speech coders by incorporating the properties of the pseudo-cepstrum. Since the proposed postfilter implicitly has a characteristic of tilt compensation, it does not require an additional tilt compensation filter as conventional techniques. We derive a relationship between the parameters of the proposed postfilter based on a minimum phase distortion criterion, and show a simple tuning procedure for the parameters. It is also shown that the postfilter can be implemented with a lower order. By applying this postfilter to several international speech coding standards, we reduce the complexity of the speech coders while obtaining comparable performance to conventional approaches.
|Title of host publication||2000 IEEE Workshop on Speech Coding - Proceedings|
|Subtitle of host publication||Meeting the Challenges of the New Millennium|
|Publisher||Institute of Electrical and Electronics Engineers Inc.|
|Number of pages||3|
|ISBN (Electronic)||0780364163, 9780780364165|
|Publication status||Published - 2000|
|Event||IEEE Workshop on Speech Coding - Delavan, United States|
Duration: 2000 Sept 17 → 2000 Sept 20
|Name||2000 IEEE Workshop on Speech Coding - Proceedings: Meeting the Challenges of the New Millennium|
|Other||IEEE Workshop on Speech Coding|
|Period||00/9/17 → 00/9/20|
Bibliographical notePublisher Copyright:
© 2000 IEEE.
All Science Journal Classification (ASJC) codes
- Signal Processing