18036481. NOISE SUPPRESSION LOGIC IN ERROR CONCEALMENT UNIT USING NOISE-TO-SIGNAL RATIO simplified abstract (Telefonaktiebolaget LM Ericsson (publ))

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NOISE SUPPRESSION LOGIC IN ERROR CONCEALMENT UNIT USING NOISE-TO-SIGNAL RATIO

Organization Name

Telefonaktiebolaget LM Ericsson (publ)

Inventor(s)

Chamran Moradi Ashour of Stockholm (SE)

Erik Norvell of Upplands Väsby (SE)

Martin Sehlstedt of Luleå (SE)

NOISE SUPPRESSION LOGIC IN ERROR CONCEALMENT UNIT USING NOISE-TO-SIGNAL RATIO - A simplified explanation of the abstract

This abstract first appeared for US patent application 18036481 titled 'NOISE SUPPRESSION LOGIC IN ERROR CONCEALMENT UNIT USING NOISE-TO-SIGNAL RATIO

Simplified Explanation

The patent application describes a method and decoder for generating a concealed audio frame from an audio signal. Here is a simplified explanation of the abstract:

  • The method involves analyzing a previously decoded audio signal in the frequency domain to obtain a frequency spectrum.
  • Peaks in the spectrum are identified, which represent important components of the audio signal.
  • The method estimates the relative energy between the noise spectrum and the complete spectrum.
  • Based on this relative energy, the attenuation of the noise spectrum is determined.
  • The attenuation is then applied to the noise spectrum.
  • An inverse transform is applied to the error concealment spectrum, which includes the peaks and the attenuated noise spectrum, to obtain a concealed audio frame.

Potential applications of this technology:

  • Audio signal processing and decoding systems
  • Multimedia devices and applications
  • Communication systems and codecs

Problems solved by this technology:

  • Concealing errors or missing data in audio signals during transmission or decoding
  • Improving the quality and intelligibility of audio signals in the presence of errors or missing data

Benefits of this technology:

  • Enhanced audio signal quality and intelligibility
  • Improved error resilience and error concealment capabilities
  • More robust audio transmission and decoding systems


Original Abstract Submitted

A method and a decoder for generating concealment audio frame of an audio signal. The method includes performing a frequency domain analysis of a sequence of previously decoded audio signal to obtain a frequency spectrum and identifying peaks in the spectrum. The method further includes estimating a relative energy between the noise spectrum and the complete spectrum, determining an attenuation of the noise spectrum based on the relative energy, and applying the attenuation to the noise spectrum. The method includes applying an inverse transform to time domain on an error concealment spectrum, that includes the peaks and the attenuated noise spectrum.

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