AUDIO DECODER, ENCODING AUDIO DEVICE, METHODS AND COMPUTER PROGRAM USING DEPENDING ON FREQUENCY OF SAMPLING ENCODING TIME DEFORMATION CIRCUIT

摘要

1. An audio signal decoder (200; 350) for providing a decoded representation of an audio signal (212) based on an encoded representation of an audio signal (112, 210), including information about a sampling frequency (218), encoded information about time warping (216, tw_ratio [ i]) and an encoded representation of the spectrum (214, ac_spectral_data ()), characterized in that it includes a time warp calculator (230 604) that is configured to display the encoded time warp information (216, tw_ratio [i]) on the decoded information about deformation and time (232, warp_value_tbl [tw_ratio], p), where the time warp calculator is configured to adapt a display rule for displaying code words (tw_ratio [i], index) of encoded time warp information (216) on decoded time warp values (warp_value_tbl [tw_ratio], p) describing decoded time warp information (232) depending on the sampling frequency information (218); and a warp decoder (240), configured to provide a decoded representation of the audio signal (212) based on the encoded spectrum representation (214, ac_spectral_data ()) and depending on the decoded time warp information (232) .2. The decoder according to claim 1, characterized in that the code words (tw_ratio [i], index) of the encoded time warp information (216) describe the time evolution of the time warp contour (time_contour []), and the time warp calculator (230, 604) is configured in order to evaluate a predetermined number (Num_tw_nodes) of codewords (tw_ratio [i], index) of encoded time warp information (216) for the sound frame of the encoded sound signal represented by