Apparatus for decoding an encoded audio signal with frequency tile adaption

Method of decoding an encoded audio signal comprising an encoded core audio signal and parametric data, comprising:

• decoding the encoded core audio signal to acquire a decoded core audio signal;
• analyzing the decoded core audio signal to provide an analysis result;
• and
• regenerating spectral portions not comprised in the decoded core audio signal using a spectral portion of the decoded core audio signal, the parametric data, and the analysis result, to obtain a regenerated audio signal, wherein the regenerated audio signal and the decoded core audio signal represent a decoded audio signal,
• wherein the analyzing comprises detecting a splitting of a peak portion in the spectral portion of the decoded core audio signal or to locate one or more local spectral minima in the decoded core audio signal,
• wherein the regenerating comprises changing a frequency border between the decoded core audio signal and the regenerated signal so that the splitting is reduced or eliminated, or regenerating the spectral portion, wherein one or more frequency tile borders in the spectral portion of the decoded core audio signal or in the regenerated spectral portion are set at the one or more spectral minima, and
• wherein one or more of the decoding the encoded core audio signal, the regenerating spectral portions, and the analyzing the preliminary regenerated signal is implemented, at least in part, by one or more hardware elements of an audio signal processing device.

A non-transitory computer readable medium comprising a computer program for performing, when running on a computer or a processor, a method of decoding an encoded audio signal comprising an encoded core audio signal and parametric data, the method comprising:

• decoding the encoded core audio signal to acquire a decoded core audio signal;
• analyzing the decoded core audio signal to provide an analysis result;
• and
• regenerating spectral portions not comprised in the decoded core audio signal using a spectral portion of the decoded core audio signal, the parametric data, and the analysis result, to obtain a regenerated audio signal, wherein the regenerated audio signal and the decoded core audio signal represent a decoded audio signal,
• wherein the analyzing comprises detecting a splitting of a peak portion in the spectral portion of the decoded core audio signal, and
• wherein the regenerating comprises changing a frequency border between the decoded core audio signal and the regenerated signal so that the splitting is reduced or eliminated, or regenerating the spectral portion, wherein one or more frequency tile borders in the spectral portion of the decoded core audio signal or in the regenerated spectral portion are set at the one or more spectral minima.

Audio decoder for decoding an encoded audio signal comprising an encoded core audio signal and parametric data, comprising:

• a core decoder configured for decoding the encoded core audio signal to obtain a decoded core audio signal;
• a frequency regenerator configured for regenerating spectral portions not included in the decoded core audio signal using a spectral portion of the decoded core audio signal and the parametric data to obtain a preliminary regenerated signal;
• and
• an analyzer configured for analyzing the preliminary regenerated signal;
• wherein the analyzer is configured for detecting a splitting of a peak portion in the preliminary regenerated signal at a frequency border of the decoded core audio signal or at a frequency border between two regenerated spectral portions of the preliminary regenerated signal generated by using the same or different spectral portions of the decoded core audio signal or at a maximum frequency border of the regenerated signal,
• wherein the frequency regenerator is configured to changing the frequency border between the decoded core audio signal and the preliminary regenerated signal or changing the frequency border between two regenerated spectral portions of the preliminary regenerated signal generated by using the same or different spectral portions of the decoded core audio signal or changing the maximum frequency border of the preliminary regenerated signal to obtain a regenerated audio signal in which the splitting is reduced or eliminated, wherein the regenerated audio signal and the decoded core audio signal represent a decoded audio signal, and
• wherein one of more of the analyzer, the core decoder, and the frequency regenerator is implemented, at least in part, by one of more hardware elements of the audio decoder.

Method of decoding an encoded audio signal comprising an encoded core audio signal and parametric data, comprising:

• decoding the encoded core audio signal to obtain a decoded core audio signal;
• regenerating spectral portions not included in the decoded core audio signal using a spectral portion of the decoded core audio signal and the parametric data to obtain a preliminary regenerated signal;
• and
• analyzing the preliminary regenerated signal;
• wherein the analyzing comprises detecting a splitting of a peak portion in the preliminary regenerated signal at a frequency border of the decoded core audio signal or at a frequency border between two regenerated spectral portions of the preliminary regenerated signal generated by using the same or different spectral portions of the decoded core audio signal or at a maximum frequency border of the regenerated signal,
• wherein the regenerating comprises changing the frequency border between the decoded core audio signal and the preliminary regenerated signal or changing the frequency border between two regenerated spectral portions of the preliminary regenerated signal generated by using the same or different spectral portions of the decoded core audio signal or changing the maximum frequency border of the preliminary regenerated signal to obtain a regenerated audio signal in which the splitting is reduced or eliminated, wherein the regenerated audio signal and the decoded core audio signal represent a decoded audio signal, and
• wherein one or more of the decoding the encoded core audio signal, the regenerating spectral portions, and the analyzing the preliminary regenerated signal is implemented, at least in part, by one or more hardware elements of an audio signal processing device.

A non-transitory computer readable medium comprising a computer program for performing, when running on a computer or a processor, a method of decoding an encoded audio signal comprising an encoded core audio signal and parametric data, comprising:

• decoding the encoded core audio signal to obtain a decoded core audio signal;
• regenerating spectral portions not included in the decoded core audio signal using a spectral portion of the decoded core audio signal and the parametric data to obtain a preliminary regenerated signal;
• and
• analyzing the preliminary regenerated signal;
• wherein the analyzing comprises detecting a splitting of a peak portion in the preliminary regenerated signal at a frequency border of the decoded core audio signal or at a frequency border between two regenerated spectral portions of the preliminary regenerated signal generated by using the same or different spectral portions of the decoded core audio signal or at a maximum frequency border of the regenerated signal, and
• wherein the regenerating comprises changing the frequency border between the decoded core audio signal and the preliminary regenerated signal or changing the frequency border between two regenerated spectral portions of the preliminary regenerated signal generated by using the same or different spectral portions of the decoded core audio signal or changing the maximum frequency border of the preliminary regenerated signal to obtain a regenerated audio signal in which the splitting is reduced or eliminated, wherein the regenerated audio signal and the decoded core audio signal represent a decoded audio signal.