Zentech DF2000 Guia de Resolução de Problemas descarregar pdf (Página 43)

Title: Video Description & the Digital Transition

FAQS:

1. What is Video Description?

2. What is the impact of digital television transition on video description?

3. Will televisions with digital tuners be able to process the audio services associated with the

digital signals?

4. If I currently use available video descriptions to access television programming, what should I

be aware of regarding the digital television (DTV) transition?

1. What is Video Description?

Video descriptions are a way to inform people who are blind or have other vision disabilities of

what is happening on the television screen. Video description is the insertion of verbal

descriptions about the setting and/or action in a program when information about these visual

elements is not contained in the audio portion of the program. These descriptions supplement the

regular audio track of the program.

Some programming has contained video descriptions for a number of years. At present, video

descriptions are available through the secondary audio programming (SAP) channel on an analog

stereo TV set or VCR.

In July 2000, the FCC adopted rules to make television more accessible to people with vision

disabilities by mandating that a certain amount of programming contain video description. These

rules took effect in April 2002, but were vacated by a federal court in November 2002. As a

result, video description is not required. Nevertheless, some programming providers voluntarily

continue to provide video descriptions.

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2. What is the impact of digital television transition on video description?

With digital television, broadcasters have more audio channels on which to provide video

description. Because digital television encodes audio in a different manner than the encoding

used in analog television, digital television does not utilize a SAP channel to transmit video

descriptions. The digital television standards provide for two types of main audio service and six

types of associated services, including associated services for people with vision disabilities. The

standards also permit the transmission of secondary language programming. So while there was

one option under the old analog TV service (i.e., the SAP channel), broadcasters now have more

audio channels to provide this voluntary service.

However, we note that inserting video descriptions into digital programming that was not created

by the distributor may involve additional expense for broadcasters; for this reason, consumers

should contact their local broadcasters to determine whether video description is offered. Back to

index

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Zentech DF2000 Guia de Resolução de Problemas Página 43