Project CASL @ TEDxBaltimore 2014
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Project CASL specifications and setup at TEDxBaltimore conference, Friday Jan 31 2014. By Todd Douglas, Sarge Salman
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Project CASL @ TEDxBaltimore 2014
- 1. TEDx Baltimore January 31, 2014 Project CASL Specifications and Setup Todd Douglas Bold Yellow www.boldyellow.com hello@boldyellow.com 735 N. Eutaw St. Suite 2 Baltimore, MD 21201 Sarge Salman, PhD
- 2. Page 1 Project CASL TEDx Baltimore January 31, 2014 Overview Project CASL (Conference American Sign Language) is an effort to provide sign language for remote deaf viewers of a conference. It was implemented at the TEDx Baltimore conference in January 2014. The web page at www.projectcasl.com displayed two video streams: ◾ the live conference video stream from livestream.com ◾ the video stream of ASL interpreters via a Google Hangout On Air The web page was a simple HTML document and each video stream is an embedded iframe with code provided by the respective video providers.
- 3. Page 2 Project CASL TEDx Baltimore January 31, 2014 Livestream The official conference video stream was hosted by livestream.com. To get the embed code, go to the event page and click “Embed.” The embed type was “Player” and the screen size was 480 x 270. The embed code was pasted into the HTML file.
- 4. Page 3 Project CASL TEDx Baltimore January 31, 2014 Google Hangout The ASL interpreters were streamed by setting up a Google Hangout “On Air” video chat. This is a video stream that is publicly broadcast on YouTube and can be viewed by anyone. Note that a Hangout On Air can last up to eight hours. It’s important that the microphone is muted on the chat. The embed code from the Google Hangout was pasted into the HTML document.
- 5. Page 4 Project CASL TEDx Baltimore January 31, 2014 HTML Document The HTML document is on the Project CASL hosting server and has commented areas where the embed code should be pasted.
- 6. Page 5 Project CASL TEDx Baltimore January 31, 2014 Project CASL Studio The studio set up was under the stage of the auditorium. We used two laptop computers: one for the Hangout On Air and one for the web coding and monitoring of the web page. We had a live audio monitor so the interpreters could clearly hear the speakers on stage. And we had a live video monitor to see the stage. The interpreters stood in front of a black backdrop and were lit by two simple incandescent bulbs. A webcam was mounted to the Hangout On Air computer. The laptop was placed in front of the interpreters so they could see themselves.
- 7. Page 6 Project CASL TEDx Baltimore January 31, 2014 Project CASL Studio Black Backdrop Interpreter Audio Monitor Laptop for Google Hangout On Air Laptop for Web Dev and Monitoring Webcam Video Monitor of the Stage Internet Line 1Internet Line 2
- 8. Page 7 Project CASL TEDx Baltimore January 31, 2014 Issues During the event, we experienced a lag time of 25-45 seconds from the live event. In addition, the Livestream video and the Hangout On Air video were not in sync. Generally the Hangout lagged 20-30 seconds behind the Livestream.