Frame error concealment method and apparatus and error concealment scheme construction method and apparatus
Provided are a frame error concealment method and apparatus and an error concealment scheme construction method and apparatus. The frame error concealment method includes generating a new signal by synthesizing a plurality of previous signals that are similar to a signal of an error frame and reconstructing the signal of the error frame using the generated signal.
1. A method of concealing frame losses in a time domain, the method comprising:
receiving an input signal including a current frame and a previous frame;
if an error occurs in the current frame, selecting, by at least one processing device, an error concealment scheme for the current frame from among a plurality of error concealment schemes including a repetition and smoothing scheme, based on a plurality of parameters including an error concealment scheme for the previous frame;
concealing, by the at least one processing device, the current frame, based on the selected error concealment scheme for the current frame; and
generating a reconstructed signal based on at least the concealed current frame,
wherein the input signal has one or a combination of audio characteristic and speech characteristic.
2. The method of claim 1 , wherein the current frame is either a single error frame or a bust error frame.
3. An apparatus for concealing frame losses in a time domain, the apparatus comprising:
a receiving unit configured to receive an input signal including a current frame and a previous frame; and
at least one processor configured to:
if an error occurs in the current frame, select an error concealment scheme for the current frame from among a plurality of error concealment schemes including a repetition and smoothing scheme, based on a plurality of parameters including an error concealment scheme for the previous frame;
conceal the current frame, based on the selected error concealment scheme for the current frame; and
generate a reconstructed signal based on at least the concealed current frame,
wherein the input signal has at least one or a combination of audio characteristic and speech characteristic.
4. The apparatus of claim 3 , wherein the current frame is either a single error frame or a bust error frame.