An embedded adaptive multi-rate wideband speech coder

Authors:
A. McCree;T. Unno;A. Anandakumar;A. Bernard;E. Paksoy
Affiliations:
DSP Solutions R&DCenter, Texas Univ., Dallas, TX, USA;-;-;-;-
Venue:
ICASSP '01 Proceedings of the Acoustics, Speech, and Signal Processing, 200. on IEEE International Conference - Volume 02
Year:
2001

Citing 0
Cited 2

Low bit rate wideband WI speech coding

ICME '03 Proceedings of the 2003 International Conference on Multimedia and Expo - Volume 2
Bandwidth extension of telephone speech aided by data embedding

EURASIP Journal on Applied Signal Processing

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Abstract

This paper presents a multi-rate wideband speech coder with bit rates from 8 to 32 kb/s. The coder uses a splitband approach, where the input signal, sampled at 16 kHz, is split into two equal frequency bands from 0-4 kHz and 4-8 kHz, each of which is decimated to an 8 kHz sampling rate. The lower band is coded using the adaptive multi-rate (AMR) family of high-quality narrowband speech coders, while the higher band is represented by a simple but effective parametric model. A complete solution including this wideband speech coder, channel coding for various GSM channels, and dynamic rate adaptation, easily passed all Selection Rules and ranked second overall in the 3GPP AMR Wideband Selection Testing. Besides the high performance, additional advantages of the embedded split-band approach include ease of implementation, reduced complexity, and simplified interoperation with narrowband speech coders.