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It automatically extracts slides plus their text and image elements, aligns them with the presenter’s speech, and delivers audio notifications when slide changes occur or when slide elements are not described by the speaker. Learners can pause the video and browse the full slide set or focus on undescribed elements to quickly find missing information. 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In a user study, blind and visually impaired participants found it easier to locate undescribed slide elements with the synchronized interface and read fewer fully redundant slides.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},308789,1790643060,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":34,"category_name":35,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":81,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":139,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":144,"read_time":41},962075114101,"https://ap-avatar.wpscdn.com/avatar/e000253a75eb197efd?x-image-process=image/resize,m_fixed,w_180,h_180&k=1780044092746381165","Slidecho: Flexible Non-Visual Exploration of Presentation Videos  \nYi-Hao Peng  \n[yihaop@cs.cmu.edu](yihaop@cs.cmu.edu)[ ](yihaop@cs.cmu.edu)Carnegie Mellon University Pittsburgh, PA, USA  \nJeffrey P. Bigham  \n[jbigham@cs.cmu.edu](jbigham@cs.cmu.edu)[ ](jbigham@cs.cmu.edu)Carnegie Mellon University Pittsburgh, PA, USA  \nAmy Pavel  \n[apavel@cs.cmu.edu](apavel@cs.cmu.edu)[ ](apavel@cs.cmu.edu)Carnegie Mellon University Pittsburgh, PA, USA  \nA C  \nB  \nD  \nFigure 1: Slidecho features a (A) video player augmented with optional audio notifications for new slides, and undescribed elements, a (B) video timeline that lets viewers play/pause and navigate via slide boundaries, a (C) slides pane that enables viewers to navigate the slide structure (slides can optionally advance along with the video), and an (D) undescribed elements pane to quickly gain information about only the slide elements not present in the narration of a video. Edit mode (‘Edit’) lets people optionally correct Slidecho’s automatically extracted slide boundaries, text elements, and image elements.  \nABSTRACT  \nWe present Slidecho, a system that enables non-visual access of the slide content in a presentation video on-demand. Slidecho automatically extracts slides and their text and image elements from the presentation video and aligns these elements to the presenter’s speech. When listening to the video, Slidecho provides learners with audio notifications about slide changes and slide elements that are not described by the presenter. The learner can pause the video and browse the entire slide, or only the undescribed slide  \nThis work is licensed under a Creative Commons Attribution International 4.0 License.  \nASSETS’21, October 18–22, 2021, Virtual Event, USA © 2021 Copyright held by the owner/author(s) .  \nACM ISBN 978-1-4503-8306-6/21/10 . [https://doi.org/10.1145/3441852.3471234](https://doi.org/10.1145/3441852.3471234)  \nelements, to gain information. A technical evaluation with presentation videos in-the-wild shows that compared to the presenter’s speech alone, Slidecho provides access to an additional 20% of total text elements and 30% of total image elements that were previously not described. Blind and visually impaired participants in our user study reported that it was easier to locate undescribed slide elements with Slidecho’s synchronized interface than when browsing the video and extracted slides separately, and using Slidecho they read fewer slides that were fully redundant with the speech.  \nCCS CONCEPTS  \n• Human-centered computing → Interactive systems and tools; Accessibility systems and tools.  \nKEYWORDS  \nAccessibility; Video; Audio description; Presentation; Slides; Multi-media consumption  \nACM Reference Format:  \nYi-Hao Peng, Jeffrey P. Bigham, and Amy Pavel. 2021. Slidecho: Flexible Non-Visual Exploration of Presentation Videos. In The 23rd International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS ’21), October 18–22, 2021, Virtual Event, USA. ACM, New York, NY, USA, 12 pages. [https://doi.org/10.1145/3441852.3](https://doi.org/10.1145/3441852.3)  \n1 INTRODUCTION  \nVideos are increasingly important for learning online across education, work, and hobbies. When recording educational videos such as course lectures, conference talks, and TED-style talks, many speakers use slides as visual aids. When speakers fail to describe key information in their slides, people who can not seethe slides miss important information and visual jokes [52, 63] . This unequal access to information in recorded presentation videos adds to ex-isting inequalities in access to educational content for blind and visually impaired students [10, 11, 35] .  \nTo make presentation videos accessible to blind and visually impaired students, accessibility guidelines suggest that speakers [15, 40, 46]: describe the visual content during the presentation [40], add audio descriptions to the final video [15], and/or distribute accessible slides that include image ","cbCaia55f9nvLVwg","https://ap.wps.com/l/cbCaia55f9nvLVwg","pdf",4164983,12,"English","# Introduction\n## Problem: Limited visual access in recorded presentations\n## Prior approaches and their limitations\n## Proposed solution: Slidecho","[{\"question\":\"How does Slidecho help learners access slide content without vision?\",\"answer\":\"Slidecho extracts slides from a presentation video, aligns slide elements with the presenter’s speech, and provides audio notifications for slide changes and for slide elements not described by the speaker.\"},{\"question\":\"What can a learner do while using Slidecho?\",\"answer\":\"A learner can pause the video and browse all extracted slides or browse only the slide elements that were not described in the narration.\"},{\"question\":\"How was Slidecho evaluated, and what were the results?\",\"answer\":\"A technical evaluation using in-the-wild presentation videos showed Slidecho provides additional access to previously undescribed text and image elements. In a user study, blind and visually impaired participants found it easier to locate undescribed slide elements with the synchronized interface and read fewer fully redundant slides.\"}]","Slidecho: Flexible Non-Visual Exploration of Presentation Videos - read online free | PDF",1789872351]