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Methods for frequency domain packet loss concealment and related decoder

A decoder, associated technology, applied in the field of decoders to achieve the effect of reducing impact and reducing potentially unreliable endpoints

Pending Publication Date: 2021-09-24
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For noise-like signals, one approach might produce noise with a spectral structure like

Method used

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  • Methods for frequency domain packet loss concealment and related decoder
  • Methods for frequency domain packet loss concealment and related decoder
  • Methods for frequency domain packet loss concealment and related decoder

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Embodiment Construction

[0026]Hereinafter, the inventive concept will be described more fully with reference to the accompanying drawings, in which examples of embodiments of the inventive concept are shown. However, inventive concepts may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the inventive concept to those skilled in the art. It should also be noted that these embodiments are not mutually exclusive. Components from one embodiment may be assumed to be present / used in another embodiment by default.

[0027] The following description presents various embodiments of the disclosed subject matter. These embodiments are presented as teaching examples and are not to be construed as limiting the scope of the disclosed subject matter. For example, certain details of the described embodiments may be modified...

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Abstract

A method, decoder, and program code for filling an analysis window length with a time domain signal for concealing a lost audio frame associated with a received audio signal. A first segment of a previously received part of a received audio signal is copied from a prototype buffer. A second segment of the previously received part of the received audio signal is overlap added from the prototype buffer to an initial portion of a reconstructed part of the received audio signal followed by a remaining portion of the reconstructed part of the received audio signal.

Description

technical field [0001] The present disclosure generally relates to a method for padding an analysis window length to conceal missing audio frames associated with a received audio signal. The present disclosure also relates to a decoder configured to pad an analysis window length to conceal missing audio frames associated with a received audio signal. Background technique [0002] Transmission of speech / audio over modern communication channels / networks is mostly done in the digital domain using speech / audio codecs. This may involve taking an analog signal and digitizing it using sampling and an analog-to-digital converter (ADC) to obtain digital samples. These digital samples can be further grouped into frames, which, depending on the application, contain samples of a continuous period of 10–40ms. These frames can then be processed using a compression algorithm, which reduces the number of bits that need to be transmitted and still achieve the highest possible quality. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L19/005G10L19/02
CPCG10L19/02G10L19/005G10L19/0212G10L19/0204G10L25/18H04L65/75G10L25/45H04L65/80G06F17/142
Inventor 马丁·绍尔斯戴德乔纳斯·斯韦德贝里
Owner TELEFON AB LM ERICSSON (PUBL)