Audio signal decoder, time warp contour data provider, method and computer program

摘要

An audio signal decoder has a time warp contour calculator, a time warp contour data rescaler and a warp decoder. The time warp contour calculator is configured to generate time warp contour data repeatedly restarting from a predetermined time warp contour start value, based on time warp contour evolution information describing a temporal evolution of the time warp contour. The time warp contour data rescaler is configured to rescale at least a portion of the time warp contour data such that a discontinuity at a restart is avoided, reduced or eliminated in a rescaled version of the time warp contour. The warp decoder is configured to provide the decoded audio signal representation, based on an encoded audio signal representation and using the rescaled version of the time warp contour.

主权项

1. An audio signal decoder configured to provide a decoded audio signal representation on the basis of an encoded audio signal representation comprising a time warp contour evolution information, the audio signal decoder comprising:
a time warp calculator configured to generate time warp contour data repeatedly restarting from a predetermined time warp contour start value on the basis of the time warp contour evolution information describing a temporal evolution of the time warp contour; a time warp contour rescaler configured to rescale at least a portion of the time warp contour data such that a discontinuity at a restart is avoided, reduced or eliminated in a rescaled version of the time warp contour; and a warp decoder configured to provide the decoded audio signal representation on the basis of the encoded audio signal representation and using the rescaled version of the time warp contour; wherein the time warp contour rescaler is configured to multiply time warp contour data values with a normalization factor, to scale the portion of the time warp contour, or to divide time warp contour data values by a normalization factor to scale the portion of the time warp contour; wherein the audio signal decoder is implemented using a hardware apparatus, or using a computer, or using a combination of a hardware apparatus and a computer.