Adaptive encoding of transient audio signals

An encoder comprising:

• processing circuitry;
• and
• memory coupled with the processing circuitry, wherein the memory includes instructions that when executed by the processing circuitry causes the encoder to perform operations comprising:
• while encoding an input signal in frames using a frequency-domain, FD, coding scheme or time-domain, TD, coding scheme, detecting one or more of a transient attack and a transient release in the input signal and a location of the one or more of the transient attack and the transient release in at least one of a current frame and a previous frame;
• determining whether or not to force a TD coding scheme to be used based on a plurality of conditions associated with the one or more of the transient attack and the transient release;
• and
• responsive to determining that the TD coding scheme is forced to be used, selecting the TD coding scheme.

A computer program product comprising a non-transitory storage medium including program code to be executed by processing circuitry of an encoder, whereby execution of the program code causes the encoder to perform operations comprising:

• while encoding an input signal in frames using a frequency-domain, FD, coding scheme or time-domain, TD, coding scheme, detecting one or more of a transient attack and a transient release in the input signal and a location of the one or more of the transient attack and the transient release in at least one of a current frame and a previous frame;
• determining whether or not to force a TD coding scheme to be used based on a plurality of conditions associated with the one or more of the transient attack and the transient release;
• and
• responsive to determining that the TD coding scheme is forced to be used, selecting the TD coding scheme.