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US 5,963,899 AGranted
Method and system for region based filtering of speech
AssigneesU S West, Inc., MediaOne Group, Inc.
InventorsAruna Bayya, Marvin L. Vis
Life of this patent
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Abstract
A speech signal divided into frames, each frame having a sound type, and a class is determined for each frame depending on the sound type of the frame. One of multiple filters is selected for each frame depending on the class of the frame. Each frame is filtered according to the filter selected, and the filtered frames combined to provide a filtered speech signal. The system includes filters and software.
Claims18
A method for adaptively filtering a speech signal, the method comprising:
- dividing the signal into a plurality of frames, each frame having one of a plurality of sound types associated therewith;
- determining one of a plurality of classes for each frame, wherein the class determined depends on the sound type associated with the frame;
- selecting one of a plurality of filters for each frame, wherein the filter selected depends on the class of the frame;
- filtering each frame according to the filter selected;
- and
- combining the plurality of filtered frames to provide a filtered speech signal.
3 more elements
A system for adaptively filtering a speech signal, the system comprising:
- means for dividing the signal into a plurality of frames, each frame having one of a plurality of sound types associated therewith;
- means for determining one of a plurality of classes for each frame, wherein the class determined depends on the sound type associated with the frame;
- a plurality of filters for filtering the frames;
- means for selecting one of the plurality of filters for each frame, wherein the filter selected depends upon the class of the frame;
- and
- means for combining the plurality of filtered frames to provide a filtered speech signal.
3 more elements
Dependencies are inferred from the claim text.