Re: Vision impaired interface

From: Matt Shomphe <mshomphe_at_comcast_dot_net>
Date: Thu Oct 30 2003 - 22:25:32 CST

At 10:12 PM 10/30/2003 -0600, you wrote:
> > though. For example, the first that came to my mind was, how to
> > handle write-ins - any ideas?
>Write-ins present a number of different and difficult problems.
>First, for voters who are good at typing. There are many examples of typing
>interfaces for blind users. These interfaces for instance allow the user to
>choose to type with no feedback, with line by line feedback, with word by
>word feedback, or with key by key feedback. For any particular interface,
>it takes a while for the users to learn the commands, but this investment
>has a long term payoff. Users typically turn off most of the feedback once
>they get good at the system. The voting system must be simpler, since it
>should not require a long training period. A suggestion would be to give
>all three - letter-by-letter, word-by-word, and end of line audible feedback
>with no options . Thus if the user typed in John Smith [and then hit
>ENTER], the computer would say: J O H N John S M I T H Smith [pause] John
>Then there would be an option to confirm or to go back and retry. All this
>is a straightforward software coding task
>For the user who is not a decent typist or can't type at all it is harder.
>One approach would be to use the same system, but to substitute letter by
>letter voice recognition. The user says "J" - the computer says "J - is
>that right" - the users says "YES" or "NO" - etc. Are there any General
>Public License voice recognition programs that could recognize the spoken
>names of letters - either speaker-independent or one where the user would
>have to say the alphabet for training?
>Word by word recognition would be too hard, since the writein name could be
>any arbitrary name. Many word recognition systems work by comparing words
>spoken to expected words. But this might result in "Sharon Egger" being
>transcribed as "Schwarzenegger."
>Peter Maggs

As the resident speech-guy, I guess I should throw my hat into this:
letter recognition is really really hard. (For David, "wicked friggin'
hahd"). Basically the "ee" set: "e", "b", "c", "d".... they all have the
same vowel which makes disambiguation hard; any freely available system
will not be able to handle that. And name recognition is amazingly
difficult, especially without visual confirmation. Furthermore, if we're
doing a speech interface, that kind of does away with the privacy of the
user, correct?

What do blind people do now? Can we just revert them to an existing
system? This is a bit of an edge condition, non?

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Received on Fri Oct 31 23:17:05 2003

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