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Super-wideband fine spectrum quantization for low-rate high-quality MDCT coding mode of the 3GPP EVS codec
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Srikanth Nagisetty, Takuya Kawashima, Hiroyuki Ehara
GlobalSIP (2015), 2015.12
This article presents a low bit-rate super wideband MDCT coder, which is adopted as a part of the recently standardized codec for Enhanced Voice Services. To maximize codec performance at 13.2 kbps, existing algorithms are reviewed and several new tools are introduced into the low bit-rate MDCT coder to improve the performance of the coder while coding music and mixed content. A subjective listening test demonstrates the advantage of the proposed system for 13.2 kbps when compared to AMR-WB+.
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