| 摘要 |
A method and apparatus for frame loss concealment. The method analyzes (S11) sign changes of transform coefficients in received audio frames by determining a number of sign changes between corresponding transform coefficients of bands, each comprising a plurality of coefficients, of consecutive frames that do not contain transient. It accumulates (S12) the number of sign changes in corresponding bands of consecutive frames. It reconstructs (S13) a lost frame by copying the transform coefficients from a previous frame, but with reversed signs of transform coefficients in bands having an accumulated number of sign changes that exceeds a predetermined threshold. |
