Back to results
US 2020/0090637 A1Published application
Method and system for implementing a modal processor
OwnerJonathan Stuart Abelinventor
Life of this patent
Estimating the term…
Abstract
The implementation of modal processors, which involve the parallel combination resonant filters, may be costly for applications such as artificial reverberation that can require thousands of modes. In one embodiment, the input signal is decomposed into a plurality of subbands, the outputs of which are downsampled. In each downsampled band, resonant filters are applied at the downsampled sampling rate, and their output is upsampled and filtered to form the band output.
Claims16
A method comprising:
- receiving a source signal;
- and
- applying artificial reverberation to the source signal by artificial reverberation to the source signal by processing the source signal in parallel using a plurality of mode filters having respective mode frequencies, the processing includes:
- processing the source signal in frequency subbands defined by a bank of filters, at least two of the filters having non-overlapping pass bands, transition bands, and stop bands, and with each frequency in the audio band appearing in either a single pass band, or a pair of transition bands,
- wherein each mode filter of the plurality of mode filters is assigned to a single subband or a pair of subbands according to its respective mode frequency.
2 more elements
A method comprising:
- receiving a source signal;
- and
- applying artificial reverberation to the source signal by artificial reverberation to the source signal by processing the source signal in parallel using a plurality of mode filters having respective mode frequencies, the processing includes:
- processing the source signal in frequency subbands defined by a bank of filters, at least two of the filters having overlapping pass bands, and with each frequency in the audio band appearing in either a single pass band, or a pair of transition bands,
- wherein each mode filter of the plurality of mode filters is assigned to a single subband or a pair of subbands according to its respective mode frequency.
2 more elements
A method comprising:
- receiving a source signal;
- applying, by the computer, artificial reverberation to the source signal by processing the source signal in parallel using a plurality of mode filters, wherein the processing includes:
- processing the source signal in frequency subbands defined by a bank of filters, at least two of the filters having non-overlapping pass bands, transition bands, and stop bands, and with each frequency in the audio band appearing in either a single pass band, or a pair of transition bands,
- wherein each mode filter of the plurality of mode filters is assigned to a single subband or a pair of subbands according to its respective mode frequency;
- and
- summing outputs of the plurality of mode filters to produce an artificially reverberated version of the source signal.
3 more elements
Dependencies are inferred from the claim text.