Decoder and decoding method for LC3 concealment including full frame loss concealment and partial frame loss concealment

A method for decoding a current frame to reconstruct an audio signal, wherein the audio signal is encoded within the current frame, wherein the current frame comprises a current bitstream payload, wherein the current bitstream payload comprises a plurality of payload bits, wherein the plurality of payload bits encodes a plurality of spectral lines of a spectrum of the audio signal, wherein each of the payload bits exhibits a position within the bitstream payload, wherein the method comprises:

• reconstructing the audio signal, and
• outputting the audio signal,
• wherein, in a partial frame loss concealment mode, reconstructing the audio signal is conducted without conducting error concealment for one or more first spectral lines of the plurality of spectral lines of the spectrum, which exhibit a frequency being smaller than or equal to a threshold frequency, wherein said one or more first spectral lines have been encoded by a first group of one or more of the plurality of payload bits;
• and, in the partial frame loss concealment mode, reconstructing the audio signal is conducted by conducting error concealment for one or more second spectral lines of the plurality of spectral lines of the spectrum which exhibit a frequency being greater than the threshold frequency, wherein said one or more second spectral lines have been encoded by a second group of one or more of the plurality of payload bits.

A non-transitory digital storage medium having a computer program stored thereon to perform the method for decoding a current frame to reconstruct an audio signal, wherein the audio signal is encoded within the current frame, wherein the current frame comprises a current bitstream payload, wherein the current bitstream payload comprises a plurality of payload bits, wherein the plurality of payload bits encodes a plurality of spectral lines of a spectrum of the audio signal, wherein each of the payload bits exhibits a position within the bitstream payload, wherein the method comprises:

• reconstructing the audio signal, and
• outputting the audio signal,
• when said computer program is run by a computer,
• wherein, in a partial frame loss concealment mode, reconstructing the audio signal is conducted without conducting error concealment for one or more first spectral lines of the plurality of spectral lines of the spectrum, which exhibit a frequency being smaller than or equal to a threshold frequency, wherein said one or more first spectral lines have been encoded by a first group of one or more of the plurality of payload bits;
• and, in the partial frame loss concealment mode, reconstructing the audio signal is conducted by conducting error concealment for one or more second spectral lines of the plurality of spectral lines of the spectrum which exhibit a frequency being greater than the threshold frequency, wherein said one or more second spectral lines have been encoded by a second group of one or more of the plurality of payload bits.