Evènement pour le groupe Séminaire du LaBRI

Date 2011-03-24  14:00-15:00
Titre[Sem-LaBRI] Spatial Audio Object Coding (SAOC) – an interactive perceptual coding standard 
RésuméPerceptual coding of high quality audio signals has become a tremendously successful technology for many multimedia applications (e.g. music on the Internet). By exploiting the characteristics of human auditory perception, perceptual audio coders have been able to achieve considerable bitrate reduction while retaining high audio quality. During the past ten years, an advanced generation of perceptual audio coders has emerged enabling the efficient representation of multi-channel audio signals by exploiting spatial auditory cues. As the latest extension of the Spatial Audio Coding (SAC) technology, Spatial Audio Object Coding (SAOC) is especially designed for interactive and personalized audio applications providing the user control over a number of individual audio objects at playback side. With SAOC multi-object audio content is efficiently represented by a downmix signal and object related parametric side information which enables the consumer to create his/her own remix of the music (similar to the way a sound engineer performs the mixing process in a professional audio production). Significant object level manipulations such as extreme amplification or suppression of individual audio objects has been found to be a challenging process. Because all audio objects are contained in the downmix signal, it is essential for the SAOC decoding process to completely extract and remove the particular audio object that is to be suppressed from the downmix signal. A special operation mode has been introduced to guarantee adequate coding performance even in such demanding situations. 
LieuAmphi du LaBRI 
OrateurCornelia Falch 
UrlInstitut Fraunhofer (Erlangen, Allemagne) 

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