Device and method for reducing quantization noise in a time-domain decoder

A method for reducing quantization noise in a sound signal contained in a time-domain excitation decoded by a time-domain decoder, comprising:

• evaluating, based on the decoded time-domain excitation, a time-domain excitation of a future frame;
• concatenating the decoded time-domain excitation and the time-domain excitation of the future frame to form a concatenated time-domain excitation;
• converting, by the time-domain decoder, the concatenated time-domain excitation into a frequency-domain excitation;
• producing a weighting mask for retrieving spectral information lost in the quantization noise;
• modifying the frequency-domain excitation to increase spectral dynamics by application of the weighting mask;
• and
• converting the modified frequency-domain excitation into a modified time-domain excitation;
• wherein conversion of the modified frequency-domain excitation into the modified time-domain excitation is delay-less.

A device for reducing quantization noise in a sound signal contained in a time-domain excitation decoded by a time-domain decoder, comprising:

• at least one processor;
• and
• a memory coupled to the at least one processor and comprising non-transitory code instructions that, when executed, cause the at least one processor to:
• evaluate, based on the decoded time-domain excitation, a time-domain excitation of a future frame;
• concatenate the decoded time-domain excitation and the time-domain excitation of the future frame to form a concatenated time-domain excitation;
• convert the concatenated time-domain excitation into a frequency-domain excitation;
• produce a weighting mask for retrieving spectral information lost in the quantization noise;
• modify the frequency-domain excitation to increase spectral dynamics by application of the weighting mask;
• and
• converting the modified frequency-domain excitation into a modified time-domain excitation;
• wherein conversion of the modified frequency-domain excitation into the modified time-domain excitation is delay-less.

A device for reducing quantization noise in a sound signal contained in a time-domain excitation decoded by a time-domain decoder, comprising:

• an excitation extrapolator to evaluate, based on the decoded time-domain excitation, a time-domain excitation of a future frame;
• an excitation concatenator to concatenate the decoded time-domain excitation and the extrapolated time-domain excitation of the future frame to form a concatenated time-domain excitation;
• a converter of the concatenated time-domain excitation into a frequency-domain excitation;
• a mask builder to produce a weighting mask for retrieving spectral information lost in the quantization noise;
• a modifier of the frequency-domain excitation to increase spectral dynamics by application of the weighting mask;
• and
• a converter of the modified frequency-domain excitation into a modified time-domain excitation;
• wherein conversion of the modified frequency-domain excitation into the modified time-domain excitation is delay-less.