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US 2002/0178012 A1Published application
System and method for compressed domain beat detection in audio bitstreams
AssigneeNokia Corporation
InventorsYe Wang, Miikka Vilermo
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AssigneeNokia Corporation
InventorsYe Wang, Miikka Vilermo
Estimating the term…
A system and method for detecting beats in a compressed audio domain is disclosed where a beat detector functions as part of an error concealment system in an audio decoding section used in audio information transfer and audio download-streaming system terminal devices such as mobile phones. The beat detector includes a MDCT coefficient extractor, a band feature value analyzer, a confidence score calculator; and a converging and storage unit. The method provides beat detection by means of beat information obtained using both MDCT coefficients as well as window-switching information. A baseline beat position is determined using MDCT coefficients obtained from the audio bitstream which also provides a window-switching pattern. A window-switching beat position is compared with the baseline beat position and, if a predetermined condition is satisfied, the window-switching beat position is validated as a detected beat.
A method for detecting beats in a compression encoded audio bitstream, said method comprising the steps of:
A beat detector suitable for placement into an audio device conforming to a compression-encoded audio transmission protocol, said beat detector comprising:
An audio encoder suitable for use with a compression-encoded audio transmission protocol, said audio encoder comprising:
An audio decoder suitable for use with a compression-encoded audio transmission protocol, said audio decoder comprising:
Dependencies are inferred from the claim text.