Improved magnitude response and temporal alignment in phase vocoder based bandwidth extension for audio signals

one. A device for generating an enhanced audio bandwidth from an input signal, switch-on generator (82, 102a, 102b) to generate one or more patch signals from the input signal, in which the patch signal has the center frequency of the patch, different from the center frequency of the patch of another patch or from the center frequency of the input audio signal, with the patch generator (82, 102a, 102b) is designed to extend the time component (90a, 90b, 90c; 1808; 130) subband signals from the analysis filter bank (101), and patch generator (82, 102a, 102b) includes a phase regulator (1806, 124a, 124b, 124c) to control the phase of the bandpass signals, using phase correction (151, 152, 153) channel-dependent filter bank.2. A device according to claim 1, wherein the phase controller (124a, 124b, 124c, 1806) is designed to select a phase correction (151, 152, 153) so that changes in signal amplitude made by the design of the filter bank (101, 105) are reduced or eliminated .3. A device according to claim 1, wherein the phase controller (124a, 124b, 124c, 1806) is intended to apply phase correction (151, 152, 153), the phase correction does not depend on the subband signal. A device according to claim 1, wherein the phase regulator (124a, 124b, 124c, 1806) is intended to use a phase correction depending on the signal and the transposition coefficient used (143) .5. The device according to claim 1, wherein the patch generator (82, 102a, 102b) is configured to perform block-by-block processing and comprises an extractor unit (1800, 120a, 120b, 120c) for extracting consecutive value blocks from a band-pass signal, using a value value ( e); a phase regulator (124a, 124b, 124c, 1806); and the add-on processor (1808, 130), where this processor is intended