• Skip to main content
  • Skip to secondary menu
  • Skip to primary sidebar
  • Skip to footer

mkpeReport

top analysis covering digital cinema, 3-D, HFR, and laser illumination

  • Reports
  • About
  • mkpe.com
  • cinepedia.com

Closed Caption Update

October 2009 by Michael Karagosian

Closed caption display devices were shown at ShowEast by USL and Doremi. While the end displays are somewhat similar in appearance, the technology behind each is very different.

Both devices sit on goosenecks that mount in the cup holder. Both use battery-driven electronic displays to display the caption text. The USL device uses a special lens to limit the spread of light, while Doremi relies on louvers in front of the display. USL uses infrared light to transmit caption data to the display. The same infrared transmitter can also send assistive listening audio to headsets. (The user can use the closed caption display independently of the headsets, and vice versa.) Infrared has the desirable feature that it won’t leak into a neighboring auditorium. Doremi uses IEEE 802.15.4, a technology similar to Bluetooth, also known as ZigBeeTM. Presumably some configuration is needed at the display to prevent receipt of the wrong wireless signal. The Doremi solution does not support assistive listening features.

Under the hood, USL uses the SMPTE Closed Caption Protocol from server to transmitting device. The advantage for users with this protocol is that other manufacturers of closed caption displays can utilize the same royalty-free output. Doremi uses a proprietary technique where the ZigBee transmitter plugs directly into the server. Doremi is attempting to license its technology to other server companies.

USL did not have its closed caption glasses on display. Frames and lenses for the final unit were not ready in time for the trade show. The glasses will operate from the same infrared signal used by its cup holder-mounted display.

The great irony is that Doremi is attempting to go down the licensing route, following in the footsteps of DTS and WGBH with the Rear Window system. The purpose of the SMPTE effort for the open SMPTE 430-10/11 closed caption protocol was to eliminate licensing. Only exhibitors can decide.

Filed Under: Accessibility Tagged With: Closed Captions

Primary Sidebar

Search

Topics

  • 3-D
  • Accessibility
  • Alt Content & Advertising
  • Anti-Piracy
  • Color
  • Communications
  • Deployment Entities
  • Distributors
  • Exhibitors
  • Fulfillment
  • High Dynamic Range
  • Higher Frame Rates
  • Installations
  • Patents
  • Projectors
  • Servers and IMBs
  • Sound
  • Technical Bodies
  • Theatre Management Systems
  • Trade Organizations and Shows

Full Archives

a publication of
MKPE Consulting LLC

Footer

Important Stuff

  • About
  • Privacy Policy

Archives

  • Category & Monthly Archives
Archives date back to 2008.

MKPE

mkpeReport is a publication of MKPE, a world-class consultancy building business at the crossroads of cinema and technology.
Learn more about MKPE.

copyright © 2008 - 2023 mkpe consulting llc

We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. By clicking “Accept”, you consent to the use of all cookies.
Cookie settingsACCEPT
Manage consent

Privacy Overview

This website uses cookies to improve your experience while you navigate through the website. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. But opting out of some of these cookies may affect your browsing experience.
Necessary
Always Enabled
Necessary cookies are absolutely essential for the website to function properly. These cookies ensure basic functionalities and security features of the website, anonymously.
CookieDurationDescription
cookielawinfo-checbox-analytics11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Analytics".
cookielawinfo-checbox-functional11 monthsThe cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional".
cookielawinfo-checbox-others11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other.
cookielawinfo-checkbox-necessary11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookies is used to store the user consent for the cookies in the category "Necessary".
cookielawinfo-checkbox-performance11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Performance".
viewed_cookie_policy11 monthsThe cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. It does not store any personal data.
Functional
Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features.
Performance
Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors.
Analytics
Analytical cookies are used to understand how visitors interact with the website. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc.
Advertisement
Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. These cookies track visitors across websites and collect information to provide customized ads.
Others
Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet.
SAVE & ACCEPT
Powered by CookieYes Logo