Kei Kikuiri

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We propose a low-complexity Bandwidth Extension (BWE) method operating in the Modified Discrete Cosine Transform (MDCT) domain to reduce the bitrate of wideband and super-wideband speech codecs. The proposed method generates a high-frequency signal by copying the MDCT spectrum from the low frequency part, and then adjusts tonality to improve the subjective(More)
1 At recent AES conventions, authors have had the option of submitting complete 4-to 10-page manuscripts for peer-review by subject-matter experts. The following two papers have been recognized as co-winners of the AES 132nd Convention Peer-Reviewed Paper Award. The AES has launched a new opportunity to recognize student members who author technical papers.(More)
In early 2012 the ISO/IEC JTC1/SC29/WG11 (MPEG) finalized the new MPEG-D Unified Speech and Audio Coding standard. The new codec brings together the previously separated worlds of general audio coding and speech coding. It does so by integrating elements from audio coding and speech coding into a unified system. The present publication outlines all aspects(More)
EVS, the newly standardized 3GPP Codec for Enhanced Voice Services (EVS) was developed for mobile services such as VoLTE, where error resilience is highly essential. The presented paper outlines all aspects of the advances brought during the EVS development on packet loss concealment, by presenting a high level description of all technical features present(More)
The names in bold are those of students that worked under my direct supervision. Fast recovery for a CELP-like speech codec after a frame erasure. Codage de la parole à bas et à très bas débit 2. " Annales des Télécommunications, vol. 55, n° 9-10, pp. 462-482, September 2000. [6] Philippe Gournay and Philippe Viravau. " Corrélation spectrale théorique des(More)