17918289. LOW COST ADAPTATION OF BASS POST-FILTER simplified abstract (Telefonaktiebolaget LM Ericsson (publ))

LOW COST ADAPTATION OF BASS POST-FILTER

Organization Name

Telefonaktiebolaget LM Ericsson (publ)

Inventor(s)

Chamran Moradi Ashour of Stockholm (SE)

Erik Norvell of Upplands Väsby (SE)

LOW COST ADAPTATION OF BASS POST-FILTER - A simplified explanation of the abstract

This abstract first appeared for US patent application 17918289 titled 'LOW COST ADAPTATION OF BASS POST-FILTER

Simplified Explanation

The patent application describes a method and decoder for audio decoding. Here are the key points:

• The decoder takes an encoded primary signal and decodes it to form a decoded primary signal.
• The decoded primary signal is then post-filtered to form a post-filtered signal.
• The output signal of the decoder can be either the decoded primary signal or the post-filtered signal.
• The decoder obtains an energy estimation of a frequency spectrum of the primary signal being reconstructed and analyzes discontinuities in the time domain caused by the post-filtering.
• Based on the energy estimation and analysis of discontinuities, a decision variable is generated.
• The decision variable is compared to a threshold to determine whether the output signal should be the decoded primary signal or the post-filtered signal.

Potential applications of this technology:

• Audio decoding in various devices such as smartphones, music players, and computers.
• Audio streaming services and platforms.
• Voice communication systems and applications.

Problems solved by this technology:

• Efficient decoding of audio signals while maintaining audio quality.
• Minimizing discontinuities and artifacts introduced during the post-filtering process.
• Adaptive selection of the output signal based on the characteristics of the decoded primary signal.

Benefits of this technology:

• Improved audio quality and fidelity in decoded signals.
• Reduced artifacts and distortions in the post-filtered signal.
• Adaptive selection of the output signal based on the energy and discontinuity analysis, leading to optimal audio output.

Original Abstract Submitted

A method and a decoder for audio decoding, where an encoded primary signal is decoded to form a decoded primary signal, followed by a post-filtering of the decoded primary signal to form a post-filtered signal, where an output signal of the decoder is one of the decoded primary signal and the post-filtered signal. An energy estimation of at least a part of a frequency spectrum of the primary signal being reconstructed by the decoder and an analysis of discontinuities in time domain that is caused by the post-filtering of the decoded primary signal are obtained. A decision variable is generated based on the energy estimation and the analysis of discontinuities obtained. The decision variable is compared to a threshold and the output signal is set to be the decoded primary signal or the post-filtered signal based on the comparing of the decision variable to the threshold.