One year of automatic captions and more news
This November we celebrated the first anniversary of the launch of "automatic captions or subtitles automatic. At first, we worked only with certain channel partner, but soon put the automatic captions available to everyone. As you know, we like to launch products and services quickly and keep improving based on actual user experience, so this year we have been progressing continuously to increase the quantity and improve the quality of online videos captioned. This is a summary of the achievements so far:
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users have watched videos subtitled in more than 23 million times, and have it automatically translated subtitles in more than 7.6 million opportunities. Recently, we have reduced by 20% error rate in our recognition algorithms voice.
When we launched in November 2009, mentioned how the online video presents a challenge to large scale. Before there was the automatic captions, there were about 200 thousand YouTube videos with subtitles. It may seem a huge amount, but the fact is that YouTube is up more than 35 hours of video per minute. Our goal is that everyone can access the videos, but they can not hear what is said or understand the language.
- Since March this year, users have had access to almost any video subtitles in English is spoken clearly. Less than a year later, there is clearly strong demand for subtitled content and that users have made good use of the technology we put at your disposal (more than 23 million views is not a minor detail.) Users also are using this technology to access content in their own language, as the subtitles can be translated automatically to more than 50 languages: in fact, have already been more than 7.6 million translations.
- Of course, automatic captions are not perfect, therefore we have carried out a series of initiatives to help people create subtitles manually. At an event last year called present the automatic caption
- timing, a feature that can convert a common text captions with time code.
YouTube Data API
to facilitate the development of scripts and applications that can load a large number of subtitles at once. Also, recently started the program
YouTube rating
Ready to help owners of videos to find suppliers subtitles professionals who are familiar with the technology of YouTube. Through these efforts we have seen has more than tripled the number of subtitles on YouTube created manually (now available over 500 thousand).
But when it comes subtitle, does not interest us only the quantity but also quality. And we have good news about this, because as you would a 1 year, YouTube has also been learning new words. For example, we are now able to recognize the English word "smartphone (get tested by activating the voice recognition). In recent weeks we have deployed significant improvements in our technology to optimize speech recognition accuracy of automatic captions. The new model of YouTube speech recognition reduces the error rate by about 20%. While these improvements vary from live video in accordance with sound quality and clarity of words, this means that if a video in the past correctly identified 50% of the words, now recognizes 60% and 75% identified as before, now can recognize about 80 %. As always, we will continue to make improvements so we have more news soon.
From a personal standpoint, it is encouraging to see all comments, thank you notes, videos, blog posts and to bug reports we have received in the last year. While it is impossible to answer every one of them, are very useful because they allow us to direct and focus the efforts on this project. We have considered the feedback from users perform a number of subtle improvements in service, such as the option "Always show 
automatic captions (or subtitles always display machines) with the addition of a transcription interactive button so the user can see all subtitles and skip through the video, with the red button 
(closed captions) easier to locate.
What's next? We will continue working to improve accuracy and to make the subtitles are available everywhere: on TV over the Internet, computer and cell phone. Other novelties will announce, so stay tuned. Ken
Harrenstien, Jedi Caption recently watched " Sign Language from the Space Station " http://feeds.feedburner.com/YoutubeEnEspaol
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