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A Novel Frequency Domain BWE with Relaxed Synchronization and Associated BWE Switching

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Citation Author(s):
Vaclav Eksler
Lei Miao, Zexin Liu, Xingtao Zhang, Chen Hu, Jon Gibbs, Kihyun Choo, Eunmi Oh
Submitted by:
Vaclav Eksler
Last updated:
23 February 2016 - 1:44pm
Document Type:
Presentation Slides
Document Year:
2015
Event:
GlobalSIP 2015
Presenters:
Vaclav Eksler
Categories:
Audio Coding
Speech Coding (SPE-CODI)
 

This presentation describes a novel frequency domain bandwidth extension (BWE) scheme with relaxed synchronization, optimized for coding inactive and music/mixed content signals. The algorithm achieves high subjective quality at low and medium bitrates and it has a low algorithmic delay. The algorithm is part of the 3GPP Enhanced Voice Services (EVS) codec. In addition to the presented algorithm, the EVS codec employs also a time domain BWE scheme optimized for active speech coding. Consequently a seamless switching between these BWE technologies is required and described in this paper as well.

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