Emphasis of short-duration transient speech features
AssigneeCochlear Limited
InventorsAndrew Vandali, Graeme M. Clark
Life of this patent
Estimating the term…
Abstract
A sound processor including a microphone (1), a pre-amplifier (2), a bank of N parallel filters (3), means for detecting short-duration transitions in the envelope signal of each filter channel, and means for applying gain to the outputs of these filter channels in which the gain is related to a function of the second-order derivative of the slow-varying envelope signal in each filter channel, to assist in perception of low-intensity sort-duration speech features in said signal.
Claims30
A sound processing device comprising:
- a first apparatus configured to derive an amplitude envelope for each of a plurality of frequency channels;
- and
- a second apparatus configured to detect a short-duration amplitude transition occurring in at least one of said amplitude envelopes, and to emphasize said detected amplitude transition of a selected one or more of said at least one amplitude envelope, wherein for each said selected amplitude envelope, said emphasis is based on relative differences in amplitude of said selected amplitude envelope.
A sound processing device comprising:
- a first apparatus configured to monitor a plurality of amplitude envelopes for a short-duration amplitude transition occurring in at least one of said amplitude envelopes, and a second apparatus and further configured to emphasize detected amplitude transition of a selected one or more of said at least one amplitude envelope, wherein for each said selected amplitude envelope, said emphasis is based on relative differences in amplitude of said amplitude envelope.
A cochlear implant comprising:
- a sound processing system comprising:
- a first apparatus configured to derive an amplitude envelope for each of a plurality of frequency channels;
- and
- a second apparatus configured to detect a short-duration amplitude transition occurring in at least one of said amplitude envelopes, and further configured to emphasize detected amplitude transition of a selected one or more of said at least one amplitude envelope, wherein for each said selected amplitude envelope, said emphasis is based on relative differences in amplitude of said each selected amplitude envelope.
A sound processing device comprising:
- means for deriving an amplitude envelope for a plurality of frequency channels;
- means for detecting a short-duration amplitude transition occurring in at least one of said amplitude envelopes;
- and
- means for emphasizing detected amplitude transition of a selected one or more of said at least one amplitude envelope, wherein for each said selected amplitude envelope, said emphasis is based on relative differences in amplitude of said each selected amplitude envelope.
A method of processing a sound comprising:
- deriving an amplitude envelope for each of a plurality of frequency channels;
- detecting a short-duration amplitude transition occurring in at least one of said amplitude envelopes;
- and
- emphasizing detected amplitude transition of a selected one or more of said at least one amplitude envelope, wherein for each said selected amplitude envelope, said emphasis is based on relative differences in amplitude of said each selected amplitude envelope.
Dependencies are inferred from the claim text.