Re: Vision impaired interface

From: Arthur Keller <arthur_at_kellers_dot_org>
Date: Thu Oct 30 2003 - 23:06:22 CST

At 8:25 PM -0800 10/30/03, Matt Shomphe wrote:
>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?

You can respond, "b as in bat, c as in charlie, d as in dog" or
whatever the preferred letter-words are these days. Do you mean "b
as in bat or p as in pencil"?


Arthur M. Keller, Ph.D., 3881 Corina Way, Palo Alto, CA  94303-4507
tel +1(650)424-0202, fax +1(650)424-0424
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Received on Fri Oct 31 23:17:05 2003

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