METHOD AND APPARATUS FOR PROCESSING LOST FRAME

摘要

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.

主权项

1. 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 the 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; and obtaining a high-frequency band signal of the current lost frame by adjusting the initial high-frequency band signal of the lost frame according to the adjusted gain; 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,low-frequency band signal energy of the current lost frame, anda quantity of consecutive frames that are lost, including the current lost frame.