Hum noise detection and removal for speech and music recordings
AssigneeDolby International AB
InventorChunghsin Yeh
Life of this patent
Estimating the term…
Abstract
Described are methods of processing audio data for hum noise detection and/or removal. The audio data comprises a plurality of frames. One method incudes: classifying frames of the audio data as either content frames or noise frames, using one or more content activity detectors; determining a noise spectrum from one or more frames of the audio data that are classified as noise frames; determining one or more hum noise frequencies based on the determined noise spectrum; generating an estimated hum noise signal based on the one or more hum noise frequencies; and removing hum noise from at least one frame of the audio data based on the estimated hum noise signal. Also described are apparatus for carrying out the methods, as well as corresponding programs and computer-readable storage media.
Claims20
A method of processing audio data, wherein the audio data comprises a plurality of frames, the method comprising:
- classifying frames of the audio data as either content frames or noise frames, using one or more content activity detectors;
- determining a noise spectrum from one or more frames of the audio data that are classified as noise frames;
- determining one or more hum noise frequencies based on the determined noise spectrum;
- generating an estimated hum noise signal based on the one or more hum noise frequencies;
- and
- removing hum noise from at least one frame of the audio data based on the estimated hum noise signal.
Dependencies are inferred from the claim text.