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;;; ;;
;;; Centre for Speech Technology Research ;;
;;; University of Edinburgh, UK ;;
;;; Copyright (c) 2003, 2004 ;;
;;; All Rights Reserved. ;;
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;;;
;;; Multisyn Pause module (Rob Clark and Korin Richmond)
;;;
;;;
(defvar BB_Pause "B_300")
(defvar B_Pause "B_150")
(defvar mB_Pause "B_150") ; shouldn't be used
(define (MultiSyn_Pauses utt)
"(MultiSyn_Pauses UTT)
Predict pause insertion in a Multisyn unit selection utterance structure."
(let ((words (utt.relation.items utt 'Word)) lastword tpname)
(if words
(begin
(insert_initial_pause utt) ;; always have a start pause
(set! lastword (car (last words)))
(mapcar
(lambda (w)
(let ((pbreak (item.feat w "pbreak"))
(emph (item.feat w "R:Token.parent.EMPH")))
(cond
((string-equal pbreak "BB")
(unitselection_pause_insert w BB_Pause))
((string-equal pbreak "mB")
(unitselection_pause_insert w mB_Pause))
((string-equal pbreak "B")
(unitselection_pause_insert w B_Pause)))))
words)
;; The embarassing bit. Remove any words labelled as punc or fpunc
(mapcar
(lambda (w)
(let ((pos (item.feat w "pos")))
(if (or (string-equal "punc" pos)
(string-equal "fpunc" pos))
(let ((pbreak (item.feat w "pbreak"))
(wp (item.relation w 'Phrase)))
(if (and (string-matches pbreak "BB?")
(item.relation.prev w 'Word))
(item.set_feat
(item.relation.prev w 'Word) "pbreak" pbreak))
(item.relation.remove w 'Word)
;; can't refer to w as we've just deleted it
(item.relation.remove wp 'Phrase)))))
words)))
;(utt.relation.print utt 'Word)
;(utt.relation.print utt 'Segment)
utt))
(define (unitselection_pause_insert word pause)
"(pause_insert word pause)
Insert segments needed for a pause."
(let ((silence (car (cadr (car (PhoneSet.description '(silences))))))
(seg (item.relation (find_last_seg word) 'Segment))
pause_item)
;(format stderr " inserting pause after: %s.\n" (item.name seg))
;(format stderr " Inserting pause\n")
; if next seg is not silence insert one.
(if (or (not (item.next seg))
(not (string-equal (item.name (item.next seg)) silence)))
(item.insert seg (list silence) 'after))
; insert pause after that if not the end.
(if (item.next (item.next seg))
(begin
(set! pause_item (item.insert (item.next seg) (list pause) 'after))
;if next seg after that is not silence add one.
(if (not (string-equal (item.name (item.next pause_item)) silence))
(item.insert pause_item (list silence) 'after))))))
(provide 'multisyn_pauses)
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