A novel frequency domain BWE with relaxed synchronization and associated BWE switching

Miao, Lei; Liu, Zexin; Zhang, Xingtao; Hu, Chen; Gibbs, Jon; Choo, Kihyun; Oh, Eunmi; Eksler, Vaclav

doi:10.1109/globalsip.2015.7418275

Cited by 3 publications

(1 citation statement)

References 8 publications

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“…6 In contemporary audio coding standard system, BWE is become a necessary module to code HF signals. For example, MPEG advance audio coding (AAC) used a spectral band replication method (SBR), 7 AMR WB+ used an LPC-based BWE, 8 ITU-T G.729.1 used a hierarchical BWE, 9 China AVS-M (also called the AVS P10 in China) used a LPC-based BWE in FFT domain, 10,11 MPEG union speech and audio coding (USAC) used an enhanced SBR (eSBR), 12 3GPP EVS used a multi-mode BWE method, including TDBWE, 13 FDBWE, 14 and IGF. 15 Recent BWE approaches have attracted more and more attention from researches, because of its good performance in high perception quality of coding and low bitrates.…”

Section: Introductionmentioning

confidence: 99%

A new source‐filter model audio bandwidth extension using high frequency perception feature for IoT communications

Jiang

Wang

et al. 2018

Concurrency and Computation

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Summary Audio coding is a generic technology to IoT applications system. Audio bandwidth extension is a standard technique within contemporary audio codecs to efficiently code audio signals at low bitrates. In existing methods, high frequency signal is generated by a duplication of the corresponding low frequency and some parameters of high frequency. However, the perception quality of coding will significantly degrade if the correlation between high and low frequency becomes weak. In this paper, we proposed a new source‐filter model audio bandwidth extension method. In our method, a perception feature of the high frequency signal is extracted to restore the perception quality of coding. In the decoder side, the crest factor and noise level are obtained under the constraint of the high frequency perception parameter. The performance shown in our experiment results are superior to the classic methods. Compared with the state of art method, the proposed method is also comparative because of the coding bitrate is significantly reduced and keeps a close perception quality of coding. This paper also provided a new solution for IoT communications that requires low bitrates and high quality of coding, especially like Internet of Vehicles.

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