| 期刊全稱 | Bandwidth Extension of Speech Using Perceptual Criteria | | 影響因子2023 | Visar Berisha,Steven Sandoval,Julie Liss | | 視頻video | http://file.papertrans.cn/181/180561/180561.mp4 | | 學科分類 | Synthesis Lectures on Algorithms and Software in Engineering | | 圖書封面 |  | | 影響因子 | 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 infor | | Pindex | Book 2013 |
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