US 9,852,738 B2Granted

Method and apparatus for processing lost frame

AssigneeHuawei Technologies Co., Ltd.

InventorsBin Wang, Zexin Liu, Lei Miao

Life of this patent

Estimating the term…

Loading patent…

Abstract

Embodiments of the present application provide a method and an apparatus for recovering a lost frame in a received audio signal. The method for recovering a lost frame includes: determining an initial high-frequency band signal of a current lost frame; determining a gain of the current lost frame; determining gain adjustment information of the current lost frame; adjusting the gain of the current lost frame according to the gain adjustment information, to obtain an adjusted gain of the current lost frame; and adjusting the initial high-band signal according to the adjusted gain, to obtain a high-frequency band signal of the current lost frame. The method and the apparatus for recovering a lost frame provided in the embodiments of the present application can be used in an audio signal decoding process for low-loss recovery of a lost frame of the audio signal, resulting in improved performance of an audio signal decoder.

Claims8

Dependent claims

A method for recovering lost frames in a received audio signal, performed by a signal decoding apparatus in an audio signal receiver, wherein the method comprises:

determining an initial high-frequency band signal of a current lost frame in a received audio signal;
determining a gain of the current lost frame according to a gain of a previous frame of the current lost frame;
obtaining adjustment information of the current lost frame for adjusting the gain of the current lost frame;
obtaining an adjusted gain of the current lost frame by adjusting the gain of the current lost frame according to the adjustment information;
obtaining an adjusted excitation adjustment factor according to the adjustment information;
and
adjusting the initial high-frequency band signal according to the adjusted gain and the adjusted excitation adjustment factor, to obtain the high-frequency band signal of the current lost frame;
wherein the adjustment information of the current lost frame comprises any one or any combination of:
class information of the current lost frame,
low-frequency band spectral tilt of the current lost frame, and
low-frequency band signal energy of the current lost frame.

8 more elements

An audio signal decoding apparatus, comprising:

a processor, and a storage medium coupled to the processor and storing programming instructions for execution by the processor,
wherein the programming instructions, when executed by the processor, cause the processor to perform a process of recovering lost frames in a received audio signal,
wherein the process comprises:
determining an initial high-frequency band signal of a current lost frame;
determining a gain of the current lost frame according to a gain of a previous frame of the current lost frame;
obtaining adjustment information of the current lost frame for adjusting the gain of the current lost frame;
obtaining an adjusted gain of the current lost frame by adjusting the gain of the current lost frame according to the adjustment information;
obtaining an adjusted excitation adjustment factor according to the adjustment information;
and
adjusting the initial high-frequency band signal according to the adjusted gain and the adjusted excitation adjustment factor, to obtain the high-frequency band signal of the current lost frame;
wherein the adjustment information of the current lost frame comprises any one or any combination of:
class information of the current lost frame,
low-frequency band spectral tilt of the current lost frame, and
low-frequency band energy of the current lost frame.

11 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/385,881Filed 21 Dec 2016 · continuation
Priority: CN 2014 1 029112325 Jun 2014
Published: US 2017/0103764 A113 Apr 2017
Granted: 26 Dec 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

G10L 19/083
Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters: the excitation function being…
G10L 19/005
Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals,…:…
G10L 19/0204
Using spectral analysis, e.g. transform vocoders or subband vocoders: using subband decomposition
G10L 21/038
Speech enhancement, e.g. noise reduction or echo cancellation: using band spreading techniques