Accessibility Technology Case Study: Audio Description Platform for Visually Impaired Audiences

Q: What is audio description technology?

Audio description provides narrated explanations of visual elements in films or videos, allowing visually impaired audiences to understand scenes, actions and character interactions.

Q: What is acoustic fingerprint technology?

Acoustic fingerprint technology analyzes audio signals to recognize media content and detect the exact playback position of a film.

Q: Who developed the platform?

The platform was developed by Logicnord, a mobile app development and custom software development company based in Lithuania.

Project Overview

This project focuses on improving media accessibility for visually impaired audiences by delivering synchronized audio descriptions for films.

The platform uses acoustic fingerprint technology to detect the exact moment of film playback and automatically synchronize audio descriptions delivered through a mobile application.

Logicnord developed the mobile applications and custom software systems powering the platform - enabling visually impaired users to watch films in cinemas or at home with real-time narration describing visual elements.

The project was funded by European Union innovation programs supporting accessibility technologies.

Project Summary

Industry: Accessibility Technology / Media Tech
Platform: iOS, Android
Services: Mobile App Development, Custom Software Development
Technology: Acoustic Fingerprint Recognition, Audio Synchronization Algorithms
Project Type: Assistive Technology Platform
Compliance: WCAG accessibility standards
Funding: European Union innovation program

About the Project

Films rely heavily on visual storytelling, making it difficult for visually impaired audiences to fully experience content.

Audio description technology bridges this gap by providing narrated explanations of scenes, actions and characters.

The platform allows users to listen to synchronized audio descriptions through headphones while watching a film.

Using acoustic fingerprint recognition, the system automatically detects the current playback position of the film and plays the corresponding narration track.

The solution is fully compatible with accessibility features available on mobile operating systems - including screen readers such as VoiceOver (iOS) and TalkBack (Android) - enabling users to navigate the application through audio feedback.

This enables seamless usage both in cinemas and in home viewing environments.

The Challenge

Detecting film playback position using acoustic fingerprint recognition
Calibrating acoustic fingerprint algorithms to achieve both high accuracy and fast detection
Synchronizing audio description tracks with film scenes in real time
Ensuring reliable performance across cinemas and home environments
Minimizing latency between film playback and narration
Designing an interface accessible for visually impaired users and compatible with screen readers

Our Approach

Logicnord developed a real-time media synchronization platform combining mobile applications and custom backend systems.

The solution was built to automatically detect film playback and deliver synchronized narration without requiring user interaction.

Key priorities included:

Real-time audio recognition and synchronization
High accuracy and low latency
Accessibility-first UX design
Full compatibility with mobile accessibility tools (VoiceOver, TalkBack)
Cross-platform mobile delivery

Related Logicnord services include:

The Solution

The platform enables visually impaired users to:

Listen to synchronized audio descriptions while watching films
Automatically detect film playback without manual setup
Navigate the application using screen readers
Use the application both in cinemas and at home
Receive real-time narration aligned with visual scenes
Access content through a WCAG-compliant mobile interface

Key Platform Features

Synchronized audio descriptions for films
Automatic film recognition using acoustic fingerprinting
Real-time audio synchronization
Compatibility with cinema screenings and home viewing
Support for VoiceOver (iOS) and TalkBack (Android)
WCAG-compliant accessible interface
Headphone-based narration playback
Admin panel for uploading films, audio tracks and descriptions
Content management system for audio description workflows

Architecture & Engineering Insights

The platform is built on a combination of mobile applications and real-time audio processing systems.

Core technologies include:

Acoustic fingerprint recognition for detecting playback position
Audio synchronization algorithms for precise narration timing
Mobile applications for iOS and Android
Backend services for managing audio description content
Admin panel for content upload and management

A key technical challenge was calibrating acoustic fingerprint detection to ensure both speed and accuracy - allowing the system to quickly identify playback position while maintaining precise synchronization.

The system is designed to deliver high accuracy and minimal delay - ensuring a seamless viewing experience for users.

Results

The platform enables visually impaired audiences to experience films with synchronized audio descriptions in real time.

The system achieved:

98%+ audio synchronization accuracy
<300ms average synchronization latency
500+ supported screenings and viewing sessions

The system delivers:

Accurate real-time film recognition and synchronization
Accessible user experience across iOS and Android devices
Reliable performance in both cinema and home environments

The solution demonstrates how mobile technology and real-time audio processing can significantly improve accessibility in media consumption.

Frequently Asked Questions

What is audio description technology?

Audio description provides narrated explanations of visual elements in films or videos, allowing visually impaired audiences to understand scenes, actions and character interactions.