Apparatus and method for improving a transition from a concealed audio signal portion to a succeeding audio signal portion of an audio signal

A non-transitory digital storage medium having a computer program stored thereon to perform the method for improving a transition from a concealed audio signal portion of an audio signal to a succeeding audio signal portion of the audio signal, wherein the method comprises:

• generating a decoded audio signal portion of the audio signal depending on a first audio signal portion and depending on a second audio signal portion, wherein the first audio signal portion depends on the concealed audio signal portion, and wherein the second audio signal portion depends on the succeeding audio signal portion, and
• outputting the decoded audio signal portion,
• wherein each of the first audio signal portion and of the second audio signal portion and of the decoded audio signal portion comprises a plurality of samples, wherein each of the plurality of samples of the first audio signal portion and of the second audio signal portion and of the decoded audio signal portion is defined by a sample position of a plurality of sample positions and by a sample value, wherein the plurality of sample positions is ordered such that for each pair of a first sample position of the plurality of sample positions and a second sample position of the plurality of sample positions, being different from the first sample position, the first sample position is either a successor or a predecessor of the second sample position,
• wherein generating the decoded audio signal comprises determining a first sub-portion of the first audio signal portion, such that the first sub-portion comprises fewer samples than the first audio signal portion,
• wherein generating the decoded audio signal portion is conducted using the first sub-portion of the first audio signal portion and using the second audio signal portion or a second sub-portion of the second audio signal portion, such that for each sample of two or more samples of the second audio signal portion, the sample position of said sample of the two or more samples of the second audio signal portion is equal to the sample position of one of the samples of the decoded audio signal portion, and such that the sample value of said sample of the two or more samples of the second audio signal portion is different from the sample value of said one of the samples of the decoded audio signal portion,
• when said computer program is run by a computer.

A method for improving a transition from a concealed audio signal portion of an audio signal to a succeeding audio signal portion of the audio signal, wherein the method comprises:

• generating a decoded audio signal portion of the audio signal depending on a first audio signal portion and depending on a second audio signal portion, wherein the first audio signal portion depends on the concealed audio signal portion, and wherein the second audio signal portion depends on the succeeding audio signal portion, and
• outputting the decoded audio signal portion,
• wherein each of the first audio signal portion and of the second audio signal portion and of the decoded audio signal portion comprises a plurality of samples, wherein each of the plurality of samples of the first audio signal portion and of the second audio signal portion and of the decoded audio signal portion is defined by a sample position of a plurality of sample positions and by a sample value, wherein the plurality of sample positions is ordered such that for each pair of a first sample position of the plurality of sample positions and a second sample position of the plurality of sample positions, being different from the first sample position, the first sample position is either a successor or a predecessor of the second sample position,
• wherein generating the decoded audio signal comprises determining a first sub-portion of the first audio signal portion, such that the first sub-portion comprises fewer samples than the first audio signal portion,
• wherein generating the decoded audio signal portion is conducted using the first sub-portion of the first audio signal portion and using the second audio signal portion or a second sub-portion of the second audio signal portion, such that for each sample of two or more samples of the second audio signal portion, the sample position of said sample of the two or more samples of the second audio signal portion is equal to the sample position of one of the samples of the decoded audio signal portion, and such that the sample value of said sample of the two or more samples of the second audio signal portion is different from the sample value of said one of the samples of the decoded audio signal portion.