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Multi-hysteresis format for audio coding

A coding and lag technology, applied in the field of decoding audio signals, which can solve problems such as low coding efficiency

Pending Publication Date: 2022-03-29
DOLBY INT AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these high-quality audio coding systems require relatively large amounts of data to encode audio content, i.e., have relatively low coding efficiency

Method used

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  • Multi-hysteresis format for audio coding
  • Multi-hysteresis format for audio coding
  • Multi-hysteresis format for audio coding

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Embodiment Construction

[0035] introduction

[0036] High-quality audio coding systems generally require a relatively large amount of data to encode audio content, ie, have relatively low coding efficiency. While the development of tools such as noise filling and high-frequency regeneration has shown that waveform descriptive data can be partially replaced by a smaller set of control data, no high-quality audio codec relies primarily on perceptually relevant features. However, improvements in computing power and recent advances in the field of machine learning have increased the feasibility of decoding audio primarily from arbitrary encoder formats. This disclosure presents examples of such encoder formats.

[0037] Broadly speaking, this disclosure proposes an encoding format based on auditory resolution-inspired subband envelopes and additional information. Additional information includes individual autocorrelation values ​​and individual lag values ​​per subband (and per update step). The envel...

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Abstract

Described herein is a method of encoding an audio signal. The method comprises: generating a plurality of sub-band audio signals based on the audio signal; determining a spectral envelope of the audio signal; for each sub-band audio signal, determining autocorrelation information of the sub-band audio signal based on an autocorrelation function of the sub-band audio signal; and generating an encoded representation of the audio signal, the encoded representation comprising a representation of a spectral envelope of the audio signal and a representation of autocorrelation information of the plurality of sub-band audio signals. Further described are methods of decoding the audio signal from the encoded representation, as well as corresponding encoders, decoders, computer programs and computer-readable recording media.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to the following priority applications: U.S. Provisional Application 62 / 889,118 filed August 20, 2019 (Ref: D19076USP1) and European Application 19192552.8 filed August 20, 2019 (Ref: D19076EP) , these applications are hereby incorporated by reference. technical field [0003] The present disclosure generally relates to a method of encoding an audio signal into an encoded representation and a method of decoding an audio signal from the encoded representation. [0004] Although some embodiments will be described herein with particular reference to this disclosure, it should be understood that the disclosure is not limited to this field of use, and is applicable in a broader context. Background technique [0005] Any discussion of background art throughout this disclosure should in no way be considered an acknowledgment that this art is well known or forms part of the common general know...

Claims

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Application Information

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IPC IPC(8): G10L25/18G10L19/02
CPCG10L25/18G10L19/0204G10L25/06G10L19/24
Inventor L·维莱莫斯H-M·莱托宁H·普恩豪根P·赫德林
Owner DOLBY INT AB