Abstract
An iterative training method is proposed for the design of random codebooks and channel code mapping tables for a CELP coder. The method is based on a structured excitation source such as a conjugate structure, pitch isynchronization, rotation of samples, time-domain sloped gain, and code mapping to channel code. Closed-loop distortion measure, that is, perceptually weighted distortion between the input and the synthesized speech, is used in all training procedures. The training improves the SNR by around 1 dB and improves subjective quality. The channel code mapping and channel-matched distortion measure increases robustness against channel error.
Original language | English |
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Pages | 1155-1158 |
Number of pages | 4 |
Publication status | Published - 1993 |
Externally published | Yes |
Event | 3rd European Conference on Speech Communication and Technology, EUROSPEECH 1993 - Berlin, Germany Duration: 1993 Sep 22 → 1993 Sep 25 |
Conference
Conference | 3rd European Conference on Speech Communication and Technology, EUROSPEECH 1993 |
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Country/Territory | Germany |
City | Berlin |
Period | 93/9/22 → 93/9/25 |
Keywords
- CELP
- code mapping
- codebook
- training
ASJC Scopus subject areas
- Software
- Linguistics and Language
- Computer Science Applications
- Communication