Patent ID: 8891775
Filing Date: 2014-11-18
Classification: G10L,H04S

Abstract:
1. A method for processing a digital stereo audio Left-/Right signal (L/R) by a digital encoder, the encoder comprising a predictive Temporal Noise Shaping (TNS) filter and a Mid-/Side (M/S) coding unit, the method comprising: determining a first prediction gain for a current signal frame by comparing the L/R signal and to the L/R signal processed by the TNS filter; determining a second prediction gain for the current signal frame by comparing an M/S-coded version of the L/R signal and an M/S-coded version of the L/R signal processed by the TNS filter; and disabling TNS-filtering for the current signal frame if the first and second prediction gains differ by more than a pre-determined mismatch range.