Patent ID: 11869518
Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A method for determining an adaptive hysteresis for inter-channel time difference (ICTD) parameter, the method comprising:
obtaining an ICTD estimate between a channel pair of a multi-channel audio signal;
when a reliable ICTD estimate is obtained for a frame m, low-pass filtering an inter- channel correlation (ICC) measure to obtain a long term estimate of a stability (ICCLP) of an ICTD parameter;
using said stability estimate (ICCLp) to determine a hysteresis period, during which a previously obtained reliable ICTD estimate is used, when reliable ICTD estimates are not obtained; and
setting the ICTD to zero if reliable ICTD estimates are not obtained within the hysteresis period.