Publication

Implementing a Cocktail-party Processor via Time-frequency Masking

2012
Student Projects

Abstract

The ability of human auditory systems to focus on one signal and ignore other signals in an auditory scene where several auditory events are taking place, often referred to as cocktail-party effect, is a key to localization of sound sources. This ability is partly made possible by interaural cues – Interaural Time Differences (ITDs) and Interaural Level Differences (ILDs) – between the input ear signals that assist the estimation of source azimuth angles, and separation of the signal of the desired direction from signals of non-desire directions. In this paper, we investigate simplified techniques to source separation of sound sources based on inter-channel cues. Particular emphasis is put on the selection of time-frequency masks and its effects on the quality of source separation.

Official source

https://infoscience.epfl.ch/entities/publication/1baba8d3-547f-4501-b764-d30a089cdb67

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2012
Student Projects

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/1baba8d3-547f-4501-b764-d30a089cdb67

About this result

Related concepts (32)

Sound localization

Sound localization is a listener's ability to identify the location or origin of a detected sound in direction and distance. The sound localization mechanisms of the mammalian auditory system have been extensively studied. The auditory system uses several cues for sound source localization, including time difference and level difference (or intensity difference) between the ears, and spectral information.

Signal

In signal processing, a signal is a function that conveys information about a phenomenon. Any quantity that can vary over space or time can be used as a signal to share messages between observers. The IEEE Transactions on Signal Processing includes audio, video, speech, , sonar, and radar as examples of signals. A signal may also be defined as observable change in a quantity over space or time (a time series), even if it does not carry information.

Cocktail party effect

The cocktail party effect is the phenomenon of the brain's ability to focus one's auditory attention on a particular stimulus while filtering out a range of other stimuli, such as when a partygoer can focus on a single conversation in a noisy room. Listeners have the ability to both segregate different stimuli into different streams, and subsequently decide which streams are most pertinent to them. It has been proposed that one's sensory memory subconsciously parses all stimuli and identifies discrete pieces of information by classifying them by salience.

Related publications (3)

Implementing a Cocktail-party Processor via Time-frequency Masking

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