Publications – Details
A Noise Suppression System for the AMR Speech Codec
- Authors:
- Peter Jax, Rainer Martin, Peter Vary, Marc Adrat, Imre Varga, Walter Frank, and Marc Ihle
- Book Title:
- ITG-Fachtagung Konvens 2000 / Sprachkommunikation
- Venue:
- Ilmenau, Germany
- Date:
- Oct. 2000
- Pages:
- 43–46
- Language:
- English
Abstract
In this paper we describe a noise reduction algorithm for the adptive multirate (AMR) speech codec of the GSM system. The algorithm is based on spectral weighting and explicitly takes into account the properties of the human auditory system. The weighting rule results in the smallest possible speech distortion under the constraint that the background noise should exhibit no audible distortions. The algorithm was implemented in 16 Bit fixed-point arithmetic and submitted to the ETSI AMR noise reduction standardization contest. Compared to other algorithms, our noise reduction method gave very good results in CCR tests and good results in ACR tests.
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