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Artificial bandwidth extension (ABWE) of speech signals aims to estimate wideband speech (50 Hz - 7 kHz) from narrowband signals (300 Hz - 3.4 kHz). Applying the source-filter model of speech, many existing algorithms estimate vocal tract filter parameters independently of the source signal. However, many current methods for extending the narrowband voice source signal are limited to straightforward...
The aim of the artificial bandwidth extension (BWE) of speech signals is to recover wideband speech from bandlimited speech. As the BWE algorithm is supposed to operate without additional side information on the original wideband speech, it has to exploit mutual dependencies between the available and missing frequency bands of the speech signal. In this paper the BWE is examined from an information...
Coding of wideband (7kHz) speech and audio signals is one of the currently predominant research topics in source coding, driven by evolving, new applications in high-quality communication systems and by standardization activities in ITU-T and ETSI. This article deals with basic concepts from both traditional speech and audio coding and their implications for wideband signals. An overview on the state...
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