- Apparatus and Method for Improved Concealment of the Adaptive Codebook in ACELP-like Concealment employing improved Pulse Resynchronization

摘要

There is provided an apparatus for reconstructing a frame comprising a speech signal as a reconstructed frame, the reconstructed frame being associated with one or more available frames, the one or more usable frames being associated with one or more preceding frames of the reconstructed frame And one or more subsequent frames of the reconstructed frame, and wherein the one or more available frames comprise one or more pitch cycles as one or more available pitch cycles. The apparatus includes a determination unit (210) for determining a number of samples difference that is indicative of a difference between the number of samples of the available pitch cycle of one of the one or more available pitch cycles and the number of samples of the first pitch cycle to be reconstructed, . Furthermore, the apparatus is further adapted to reconstruct the first pitch cycle to be reconstructed as a first reconstructed pitch cycle in accordance with the sample number difference and in accordance with the samples of the available pitch cycle of the one or more available pitch cycles, And a frame reconstructor 220 for reconstructing the reconstructed frame. Wherein the frame reconstructor 220 is configured to reconstruct the reconstructed frame such that the reconstructed frame completely or partially includes the first reconstructed pitch cycle and the reconstructed frame includes a second reconstructed pitch cycle Wherein the number of samples in the first reconstructed pitch cycle is different from the number of samples in the second reconstructed pitch cycle.