Error concealment method and apparatus for audio signal and decoding method and apparatus for audio signal using the same

• US 10,283,125 B2
• Filed: 06/08/2017
• Issued: 05/07/2019
• Est. Priority Date: 11/24/2006
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Oh, Eun-mi, Choo, Ki-hyun, Sung, Ho-sang, Son, Chang-yong, Kim, Jung-hoe, Lee, Kang-eun
• Primary Examiner(s): Abebe, Daniel
• Application Number:
  US15/617,469
• Publication Number:
  US 20170278520A1
• Time in Patent Office: 698 Days
• Field of Search: 704224
• CPC Class Codes: G10L 19/005 Correction of errors induced by the transmission channel, if related to the coding algorithm
• CPC Class Codes: G10L 19/0212 using orthogonal transformation
• CPC Class Codes: G10L 19/022 Blocking, i.e. grouping of samples in time; Choice of analysis windows; Overlap factoring
• CPC Class Codes: H03M 13/00 Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes error detection or error correction for analogue/digital, digital/analogue or code conversion H03M1/00 – H03M11/00; specially adapted for digital computers G06F11/08; for information storage based on relative movement between record carrier and transducer G11B, e.g. G11B20/18; for static stores G11C

Abstract

An error concealment method and apparatus for an audio signal and a decoding method and apparatus for an audio signal using the error concealment method and apparatus. The error concealment method includes selecting one of an error concealment in a frequency domain and an error concealment in a time domain as an error concealment scheme for a current frame based on a predetermined criteria when an error occurs in the current frame, selecting one of a repetition scheme and an interpolation scheme in the frequency domain as the error concealment scheme for the current frame based on a predetermined criteria when the error concealment in the frequency domain is selected, and concealing the error of the current frame using the selected scheme.

Claims

1. An apparatus for concealing an error in an audio input signal, the apparatus comprising:

at least one processor configured to;

receive an audio input signal including a previous frame and a current frame,

generate signal characteristics including stationarity of the audio input signal,

determine an error concealment scheme of the current frame from a plurality of error concealment schemes provided that the current frame corresponds to one of an error frame and a good frame after an error frame, the error concealment scheme being determined based on the signal characteristics and an error concealment scheme used for the previous frame, and

conceal the current frame based on the determined error concealment scheme.

2. The apparatus of claim 1, wherein the signal characteristics further include a parameter obtained by using a length of the current frame.

3. The apparatus of claim 1, wherein the signal characteristics further include a parameter obtained by using a window type of the previous frame.

4. An apparatus for decoding an audio input signal, the apparatus comprising:

at least one processor configured to;

decode a first frame when no error occurs in the first frame; and

determine an error concealment scheme of a second frame from a plurality of error concealment schemes provided that the second frame corresponds to a current error frame or a good frame after an error frame, the error concealment scheme being determined based on signal characteristics including stationarity of the audio input signal and an error concealment scheme used for a previous frame of the second frame; and

conceal the second frame based on the determined error concealment scheme.

5. The apparatus of claim 4, wherein the signal characteristics further include a parameter obtained by using a length of the second frame.

6. The apparatus of claim 4, wherein the signal characteristics further include a parameter obtained by using a window type of the previous frame.