Audio search engine
Popular audio search engines
Deep Audio Search
Search that is not affected by the hosting of video, where results are agnostic no matter where the video is located:
- Everyzing (formerly Podzinger until May, 2007) claims to have spent millions of dollars building speech to text audio search. Everyzing takes the user within the actual content by using speech recognition. This enables online video consumers to jump directly to the point in the video for which they are searching.
- Picsearch Audio Search has been licensed to search portals since 2006. Picsearch is a search technology provider who powers image, video and audio search for over 100 major search engines around the world.
- Munax released their first version all-content search engine in 2005 and powers both nation-wide and worldwide search engines with audio search.
Search results are modified, or suspect, due to the large hosted video being given preferential treatment in search results:
Design and algorithms
Audio search has evolved slowly through several basic search formats which exist today and all use keywords. The keywords for each search can be found in the title of the media, any text attached to the media and content linked web pages, also defined by authors and users of video hosted resources.
Some search engines can search recorded speech such as podcasts, though this can be difficult if there is background noise. Around 40 phonemes exist in every language with about 400 in all spoken languages. Rather than applying a text search algorithm after speech-to-text processing is completed, some engines use a phonetic search algorithm to find results within the spoken word. Others work by listening to the entire podcast and creating a text transcription.
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