Bandwidth extension of speech using perceptual criteria

Resource Information

The work Bandwidth extension of speech using perceptual criteria represents a distinct intellectual or artistic creation found in Sydney Jones Library, University of Liverpool. This resource is a combination of several types including: Work, Language Material, Books.

Label

Bandwidth extension of speech using perceptual criteria

Statement of responsibility

Visar Berisha, Steven Sandoval, and Julie Liss

Creator

• Berisha, Visar
• Berisha, Visar

Contributor

• Liss, Julie Marie
• Sandoval, Steven, 1984-
• Liss, Julie Marie
• Sandoval, Steven, 1984-

Author

• Sandoval, Steven, 1984-
• Berisha, Visar
• Berisha, Visar
• Liss, Julie Marie
• Liss, Julie Marie
• Sandoval, Steven, 1984-

Subject

• Compressed speech
• Compression (Audiology)
• Psychoacoustics
• Speech perception

Language

eng

Summary

Bandwidth extension of speech is used in the International Telecommunication Union G.729.1 standard in which the narrowband bitstream is combined with quantized high-band parameters. Although this system produces high-quality wideband speech, the additional bits used to represent the high band can be further reduced. In addition to the algorithm used in the G.729.1 standard, bandwidth extension methods based on spectrum prediction have also been proposed. Although these algorithms do not require additional bits, they perform poorly when the correlation between the low and the high band is weak. In this book, two wideband speech coding algorithms that rely on bandwidth extension are developed. The algorithms operate as wrappers around existing narrowband compression schemes. More specifically, in these algorithms, the low band is encoded using an existing toll-quality narrowband system, whereas the high band is generated using the proposed extension techniques. The first method relies only on transmitted high-band information to generate the wideband speech. The second algorithm uses a constrained minimum mean square error estimator that combines transmitted high-band envelope information with a predictive scheme driven by narrowband features. Both algorithms make use of novel perceptual models based on loudness that determine optimum quantization strategies for wideband recovery and synthesis. Objective and subjective evaluations reveal that the proposed system performs at a lower average bit rate while improving speech quality when compared to other similar algorithms

Member of

• Synthesis lectures on algorithms and software in engineering, 13
• Online access with purchase: Morgan & Claypool (Synthesis Collection Five)

Cataloging source

CaBNVSL

Dewey number

006.454

Illustrations

illustrations

Index

no index present

LC call number

TK7882.S65

LC item number

B473 2013

Literary form

non fiction

Nature of contents

• dictionaries
• abstracts summaries
• bibliography

Target audience

• adult
• specialized