Large Vocabulary Continuous Speech Recognition - Berlin Chen

• A* for LVCSRTC vs. A* search (1/2)– Performed with the maximum approximation( )n– The partial word sequence hypotheses w1;τ associated withnthe scores G( w play the central role1;τ )• Multistack: time-specific priority queues used to rank thenpartial word sequence hypotheses w ;τ at each time τ( )• Need a conservative estimate of the prob. Score (LM +nAcoustic) extending from ( w to the end of the speech1;τ )signal (difficult to achieve!)– Instead approximately obtained normalizednG w ;τ with1nrespect to G w ;τmax n 1w1( )1( )Speech – Berlin Chen 36