nan speech communication publication european association signal processing eurasip european speech communication association esca editor chief christel sorin france contents volume 14 4 september 1994 r waldstein boothroyd speechreading enhancement using sinusoidal substitute voice fundamental frequency nakajima automatic synthesis unit generation english speech synthesis based multilayered context oriented clustering z bond j moore note acousticphonetic characteristics inadvertently clear speech qian et al pseudo multitap pitch filters low bitrate celp speech coder e blaauw contribution prosodic boundary markers perceptual difference read spontaneous speech published elsevier science north holland freesample elsevier co uk