Efficient TTS Database Compression Based on AMR-WB Speech Coder
Jong-Wook Lim, Kichul Kim, Kyeong-Sun Kim, Hang-Seop Lee, Hae-Young Park, Moo-Young Kim · The Journal of the Acoustical Society of Korea · 2009
This paper presents an improved adaptive multi-rate wideband (AMR-WB) algorithm for the efficient Text-To-Speech (TTS) database compression. The proposed algorithm includes unnecessary common bit-stream (CBS) removal and parameter delta coding combined with speaker-dependent huffman coding to reduce the required bit-rate without any quality degradation. We also propose lossy coding schemes to produce the maximum bit-rate reduction with negligible quality degradation. The proposed lossless algorithm including CBS removal can reduce bit-rate by 12.40% without quality degradation compared with the 12.65 kbps AMR-WB mode. The proposed lossy algorithm can reduce bit-rate by 20.00% with 0.12 PESQ degradation.