| 摘要 |
The invention relates to method for the transform coding/decoding of a digital audio signal represented by a succession of frames, using windows of different lengths. According to the invention, the coding method comprises the following steps, namely: trying to detect (51) a particular event, such as an attack, in a current frame (Ti); and, if said particular event is at least detected at the start of the current frame (53), directly applying a short window (54) in order to code (56) the current frame (Ti) without applying a transition window. Consequently, the coding method has a reduced delay in relation to the prior art. In addition, an ad hoc processing step is applied during decoding in order to compensate for the direct passage from a long window to a short window during coding. |
