ERROR CONCEALMENT METHOD AND APPARATUS FOR AUDIO SIGNAL AND DECODING METHOD AND APPARATUS FOR AUDIO SIGNAL USING THE SAME

• US 20170278520A1
• Filed: 06/08/2017
• Published: 09/28/2017
• 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
• Granted Patent: US 10,283,125 B2
• Time in Patent Office: Days
• 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. A An apparatus for concealing an error in an audio or speech signal, the apparatus comprising:

at least one processor configured to;

determine an error concealment scheme of a frame from a plurality of error concealment schemes, based on signal characteristics including stationarity of the audio or speech signal and can error concealment scheme used for a previous frame of the frame, when the frame corresponds to a current error frame or a good frame after an error frame; and

conceal the frame based on the determined error concealment scheme.

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

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

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

at least one processor configured to;

decode a first frame when an error does not occur in the first frame; and

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

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

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

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