Method for parametric coding of stereo signal based on extraction of space information parameters, involves applying temporal transient resolution to determine parameters from temporal beginning positions of sounds and coding parameters

摘要

The method involves reducing channels of multi-channel audio signal (x1) to obtain a reduced signal (D) and estimating space parameters associated with the audio signal according to predetermined temporal base resolution. Temporal beginning positions of transient sounds are detected (Ti) in the reduced audio signal represented in field time frequency. Temporal transient resolution, lower than the temporal base resolution, is applied (Ri) to determine a set of space parameters from the temporal beginning positions of detected transient sounds. The parameters are coded (cod). Independent claims are also included for the following: (1) a method for parametric decoding of a multi-channel audio signal (2) a device for parametric coding of a multi-channel audio signal (3) a device for parametric decoding of a multi-channel audio signal (4) a computer program comprising code instructions of code for implementing a method for parametric coding of a multi-channel audio signal (5) a computer program comprising code instructions for implementing a method for parametric decoding of a multi-channel audio signal.