AI Subtitle Official Launch
This document is a machine-translated draft and is currently undergoing review. Some content may be inaccurate or differ from the original Korean version. For the most precise information, refer to the Korean documentation.
🤔 Why is AI Subtitle needed?
Users today want to quickly understand content anytime, anywhere, and prefer an environment where they can watch with subtitles alone, without sound. Subtitles not only improve content accessibility, but also serve as essential data for various AI-based features such as search and summarization, making them a critical element for enhancing service competitiveness.
Kollus VOD has officially introduced the AI Subtitle feature based on automatic speech recognition technology, in line with this trend. The generated subtitles are widely used to improve user comprehension and enhance overall service quality.
⚡ Kollus AI Subtitle that maximizes learning efficiency
With AI Subtitle, information delivery is maintained even during high-speed playback.
- Content consumption efficiency: Reduces the time needed to grasp key content
- Enhanced learning effect: Reinforces repetitive learning and memorization through visual subtitles
- Optimized for high-speed viewing: Delivers accurate information without missing anything, even at high playback speeds
In particular, when applied to educational and lecture content, it can improve users' learning efficiency by up to 2x or more.
📊 Subtitle accuracy proven by objective data
The accuracy of STT(Speech-to-Text) technology is generally measured by CER(Character Error Rate), where a lower value indicates higher accuracy. Kollus VOD has conducted performance comparison tests against major global STT engines using diverse samples containing a mix of Korean, English, numbers, and symbols.
| Analysis model | Ethics lecture | English lecture | Math lecture | Average of 8 videos |
|---|---|---|---|---|
| Kollus | 2.62% | 6.63% | 7.72% | 7.21% |
| Company A | 2.45% | 5.90% | 10.11% | 7.30% |
| Company B | 2.05% | 25.39% | 7.67% | 9.04% |
| Company C | 5.03% | 11.88% | 13.45% | 8.71% |
※ Surface character-based CER results optimized for Korean language characteristics (lower values indicate higher accuracy)
▶️ Subtitle UI optimized for the user's visual experience
Kollus AI Subtitle automatically adjusts the length and line breaks of subtitles to maximize readability. Displayed within approximately 1–2 lines while minimizing obstruction of the screen, users can quickly read and understand the content.
[Kollus] high-readability 1–2 line layout
[Other services] example of excessive text exposure
✍️ Subtitle editing and data utilization guide
The generated AI Subtitle can be customized and utilized in various ways.
- Data extraction: Download the generated subtitles in SRT file format to use in external video editors or documentation tasks.
- Direct editing: Use the subtitle editor within the Kollus VOD console to correct typos or refine text to fit the context, making it easy to improve the quality of the final output.
💸 Pricing and promotion information
- Billing method: Charges are based on the total length (in minutes) of videos for which AI Subtitle has been generated.
- Launch promotion:
- Benefit: 600 minutes free every month (automatically applied to all customers without a separate application process)
- Period: Until December 2025 (subject to change based on future policy)
- Notes
- If the free allowance(600 minutes) is exceeded, additional charges will apply in accordance with the service terms and conditions.
- For inquiries regarding detailed pricing and contracts, contact your Account Manager(biz@catenoid.net) or the contracted provider.