US Patent No. 11,114,110

NOISE ATTENUATION AT A DECODER


Patent No. 11,114,110
Issue Date September 07, 2021
Title Noise Attenuation At A Decoder
Inventorship Guillaume Fuchs, Erlangen (DE)
Sneha Das, Espoo (FI)
Assignee Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung e.V., Muni...

Claim of US Patent No. 11,114,110


1. A decoder for decoding a frequency-domain input signal defined in a bitstream, the frequency-domain input signal being subjected to noise, the decoder comprising:a bitstream reader to provide, from the bitstream, a version of the frequency-domain input signal as a sequence of frames, each frame being subdivided into a plurality of bins, each bin comprising a sampled value;
a context definer configured to define a context for one bin under process, the context comprising at least one additional bin in a predetermined positional relationship with the bin under process;
a statistical relationship and information estimator configured to provide:statistical relationships between the bin under process and the at least one additional bin, the statistical relationships being provided in form of covariances or correlations; and
information regarding the bin under process and the at least one additional bin, the information being provided in form of variances or autocorrelations,

wherein the statistical relationship and information estimator comprises a noise relationship and information estimator configured to provide statistical relationships and information regarding noise, wherein the statistical relationships and information regarding noise comprise a noise matrix (?N) estimating relationships among noise signals among the bin under process and the at least one additional bin;
a value estimator configured to process and acquire an estimate of the value of the bin under process on the basis of the estimated statistical relationships between the bin under process and the at least one additional bin and the information regarding the bin under process and the at least one additional bin, and the statistical relationships and information regarding noise, and
a transformer to transform the estimate into a time-domain signal.