59 citations · 101 across the 10 of their papers we have counts for
11 papers
Alternative Visual Units for an Optimized Phoneme-Based Lipreading System
Helen Bear, Richard Harvey
Lipreading is understanding speech from observed lip movements. An observed series of lip motions is an ordered sequence of visual lip gestures. These gestures are commonly known,…
Comparing heterogeneous visual gestures for measuring the diversity of visual speech signals
Helen L Bear, Richard Harvey
Visual lip gestures observed whilst lipreading have a few working definitions, the most common two are; `the visual equivalent of a phoneme' and `phonemes which are indistinguishab…
Phoneme-to-viseme mappings: the good, the bad, and the ugly
Helen L Bear, Richard Harvey
Visemes are the visual equivalent of phonemes. Although not precisely defined, a working definition of a viseme is "a set of phonemes which have identical appearance on the lips".…
Comparing phonemes and visemes with DNN-based lipreading
Kwanchiva Thangthai, Helen L Bear, Richard Harvey
There is debate if phoneme or viseme units are the most effective for a lipreading system. Some studies use phoneme units even though phonemes describe unique short sounds; other s…
Decoding visemes: improving machine lipreading
Helen L Bear
Machine lipreading (MLR) is speech recognition from visual cues and a niche research problem in speech processing & computer vision. Current challenges fall into two groups: the co…
Decoding visemes: improving machine lipreading
Helen L. Bear, Richard Harvey
To undertake machine lip-reading, we try to recognise speech from a visual signal. Current work often uses viseme classification supported by language models with varying degrees o…
Finding phonemes: improving machine lip-reading
Helen L. Bear, Richard W. Harvey, Yuxuan Lan
In machine lip-reading there is continued debate and research around the correct classes to be used for recognition. In this paper we use a structured approach for devising speaker…
Speaker-independent machine lip-reading with speaker-dependent viseme classifiers
Helen L. Bear, Stephen J. Cox, Richard W. Harvey
In machine lip-reading, which is identification of speech from visual-only information, there is evidence to show that visual speech is highly dependent upon the speaker [1]. Here,…
Which phoneme-to-viseme maps best improve visual-only computer lip-reading?
Helen L. Bear, Richard W. Harvey, Barry-John Theobald +1
A critical assumption of all current visual speech recognition systems is that there are visual speech units called visemes which can be mapped to units of acoustic speech, the pho…
Some observations on computer lip-reading: moving from the dream to the reality
Helen L. Bear, Gari Owen, Richard Harvey +1
In the quest for greater computer lip-reading performance there are a number of tacit assumptions which are either present in the datasets (high resolution for example) or in the m…
Resolution limits on visual speech recognition
Helen L. Bear, Richard Harvey, Barry-John Theobald +1
Visual-only speech recognition is dependent upon a number of factors that can be difficult to control, such as: lighting; identity; motion; emotion and expression. But some factors…