Efficient Combination of Likelihood Recycling and Batch Calculation for Fast Acoustic Likelihood Calculation
スポンサーリンク
概要
- 論文の詳細を見る
This paper proposes an efficient combination of state likelihood recycling and batch state likelihood calculation for accelerating acoustic likelihood calculation in an HMM-based speech recognizer. Recycling and batch calculation are each based on different technical approaches, i.e. the former is a purely algorithmic technique while the latter fully exploits computer architecture. To accelerate the recognition process further by combining them efficiently, we introduce conditional fast processing and acoustic backing-off. Conditional fast processing is based on two criteria. The first potential activity criterion is used to control not only the recycling of state likelihoods at the current frame but also the precalculation of state likelihoods for several succeeding frames. The second reliability criterion and acoustic backing-off are used to control the choice of recycled or batch calculated state likelihoods when they are contradictory in the combination and to prevent word accuracies from degrading. Large vocabulary spontaneous speech recognition experiments using four different CPU machines under two environmental conditions showed that, compared with the baseline recognizer, recycling and batch calculation, our combined acceleration technique further reduced both of the acoustic likelihood calculation time and the total recognition time. We also performed detailed analyses to reveal each techniques acceleration and environmental dependency mechanisms by classifying types of state likelihoods and counting each of them. The analysis results comfirmed the effectiveness of the combined acceleration technique.
論文 | ランダム
- 300 鋼中炭化物組織成分の分離定量法 : 鋼中非金属介在物定量法に関する研究 III(分析, 加工・性質, 日本鉄鋼協会 第 78 回(秋季)講演大会)
- 119 取鍋内の溶鋼の撹拌流に関する模型実験 : DH 脱ガス法に関する研究 II(真空脱ガス・その他, 製鋼, 日本鉄鋼協会 第 78 回(秋季)講演大会)
- 106 20ton 炭素鋼鋳塊内の内部性状とその成因に関する 2, 3 の所見 : 塩基性電弧炉および酸性平炉溶製の大型鍛鋼材に関する比較検討ならびに真空造塊に関する研究 VIII(転炉・造塊(操業・凝固・介在物), 製鋼, 日本鉄鋼協会第 77 回(春季)講演大会講演)
- 105 20ton 炭素鋼鋳塊内の平均凝固面の移動と凝固組織および非金属介在物分布に関する 2, 3 の所見 : 塩基性電弧炉および酸性平炉溶製の大型鍛鋼材に関する比較検討ならびに真空造塊に関する研究 VII(転炉・造塊(操業・凝固・介在物), 製鋼, 日本鉄鋼協会第 77 回(春季)講演大会講演)
- 104 20ton 炭素鋼鋳塊内の平均凝固面の移動と凝固組織および偏析に関する 2, 3 の所見 : 塩基性電弧炉および酸性平炉溶製の大型鍛鋼材に関する比較検討ならびに真空造塊に関する研究 VI(転炉・造塊(操業・凝固・介在物), 製鋼, 日本鉄鋼協会第 77 回(春季)講演大会講演)