| Paper: | SLP-L1.2 | ||
| Session: | Speech Coding for Network Applications | ||
| Time: | Tuesday, May 16, 10:50 - 11:10 | ||
| Presentation: | Lecture | ||
| Topic: | Speech and Spoken Language Processing: Wide-band Speech Coding | ||
| Title: | An Embedded Scalable Wideband Codec based on the GSM EFR Codec | ||
| Authors: | Peter Jax, Bernd Geiser, University of Technology Aachen (RWTH), Germany; Stefan Schandl, Hervé Taddei, Siemens AG, Austria; Peter Vary, University of Technology Aachen (RWTH), Germany | ||
| Abstract: | We present a technique to extend narrowband (NB) speech communication systems, using e.g. the GSM enhanced full rate (EFR) codec, with wideband (WB, 50-7000 Hz) capability. The limited acoustic bandwidth of narrowband speech coding is extended using a fairly coarse description of the missing high frequency band (3.4-7 kHz) in terms of temporal and spectral envelopes. The high-band parameters are quantized, transmitted and then used at the receiver side to regenerate the high frequency components. The parameter encoding is done by applying split vector quantization in a transformed domain. This quantization scheme can be scaled to match any given target bit rate. Several example configurations have been implemented and tested in MUSHRA-style listening tests. | ||
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