Patent ID: 8930199
Filing Date: 2015-01-06
Classification: G10L,G11B

Abstract:
1. A method for processing an audio signal, comprising: receiving, by an audio processing apparatus, coding identification information indicating whether to apply a first coding scheme based on linear-prediction domain or a second coding scheme based on frequency domain to a current frame; when the coding identification information indicates that the second coding scheme based on frequency domain is applied to the current frame, receiving window type information indicating a particular window for the current frame, from among a plurality of windows; identifying that a current window is a long_stop window based on the window type information, wherein the long_stop window is followed by only_long window of a following frame, wherein the long_stop window comprises an ascending line; and, determining a slope of the ascending line to be either a first slope or a second slope according to a previous frame, wherein the ascending line is determined to be the first slope gentler than the second slope when the first coding scheme based on linear-prediction domain is applied to the previous frame, and is determined to be the second slope when the first coding scheme based on linear-prediction domain is not applied to the previous frame, wherein the first slope is gentler than the second slope, and wherein a width of the long_stop window is 2N (where N is frame length) regardless of whether the ascending line is determined to be the first slope or not.