[Music]
Hello, my name is Alejandro Rodríguez Ascaso.
I am a professor at the Department of Artificial Intelligence at UNED.
This video is entitled "Audiovisual accessibility, visual information".
We know that the video is a sequence of images
and sounds synchronized with each other.
To perceive their information, most of those who use a video
use the sense of sight to perceive the
image and the ear to perceive the sound.
For those who for some reason cannot
correctly perceive visual information, we must act in two ways.
On the one hand, we must facilitate
the perception of visual information.
How? I launch several ideas.
Making minimalist videos, because
too much visual information at a time
usually confuses our audience. Bad thing.
Maximizing the size of the objects and
their contrast with the background.
Generating videos of sufficient quality.
In addition to facilitating the perception of visual information,
we must offer an alternative and equivalent channel to it.
The usual thing will be to use the sound
to offer that equivalent information.
An option is to include in our script the
description of the relevant visual
information that will appear in the video.
That is, figures, text, animations, etc. must be described.
In addition, we must avoid references that require the sense of sight,
such as "as it appears here" or "if we compare this with that".
On the other hand, audio description is a
support system for audiovisual communication
that supplies sound information that translates
or explains it for those who cannot see it.
Its purpose is to provide the necessary
data so that the audiovisual work
is understood as perfectly as possible.
Use a "voicenote" that describes the visual
information in the voids of the message.
That is, when there is no original sound information that is relevant.
Producing audio description therefore requires
a certain ability to write those messages
and to include the corresponding audios in the video editing process.
But there are times when the extension of the
oral description of the visual information
would be too long to include in a speech or to audio describe it.
Let's give an example.
If in an electronic subject a video contains
a circuit like this in its oral description,
it would take too long to write it in the video.
This would cause it to become too long and
in the end it would not be useful to anyone.
For this reason, an option is to detail
the description of complex images in a separate text document.
But let's go back to the concrete example of the electronic circuit.
Describing it in text is long and not very useful.
It is better to produce a tactile sheet that would allow
a detailed and unhurried exploration of the information.
For its design and production we will need to have expert people.
These documents will be available to students who
will use it together with the audiovisual material.
In short, we must meet the needs of human
diversity when we use audiovisual material.
We will use sound, textual or tactile alternatives for
the visually original information contained in our video.
In each case we will decide which is the most appropriate.
Ah, and we recommend that you think about accessibility
from the beginning when you start designing your video.
Until next time. Thank you very much.
Thank you.