Systems, methods, and apparatus for context processing using multi resolution analysis

An apparatus for processing a digital audio signal that includes a speech component and a context component, said apparatus comprising:

• a context suppressor configured to suppress a context from the digital audio signal to obtain a context-suppressed signal;
• a context generator configured to generate an audio context signal based on a first filter and a first plurality of sequences, each of the first plurality of sequences having a different time resolution, wherein the audio context signal is scaled based on at least one feature of the context-suppressed signal, and wherein scaling the audio context signal comprises scaling at least one coefficient of a first multiresolution-analysis (MRA) tree generated based on a second template MRA tree;
• and
• a context mixer configured to mix a first signal that is based on the audio context signal with a second signal that is based on the context-suppressed signal to produce a context-enhanced signal,
• wherein said context generator is configured to apply the first filter to each of the first plurality of sequences.

An apparatus for processing a digital audio signal that includes a speech component and a context component, said apparatus comprising:

• means for suppressing the context component from the digital audio signal to obtain a context-suppressed signal;
• means for generating an audio context signal that is based on a first filter and a first plurality of sequences, each of the first plurality of sequences having a different time resolution, wherein the audio context signal is scaled based on at least one feature of the context-suppressed signal, and wherein scaling the audio context signal comprises scaling at least one coefficient of a first multiresolution-analysis (MRA) tree generated based on a second template MRA tree;
• and
• means for mixing a first signal that is based on the generated audio context signal with a second signal that is based on the context-suppressed signal to obtain a context-enhanced signal,
• wherein said means for generating an audio context signal includes means for applying the first filter to each of the first plurality of sequences.

A non-transitory computer-readable medium comprising instructions for processing a digital audio signal that includes a speech component and a context component, which when executed by a processor cause the processor to:

• suppress the context component from the digital audio signal to obtain a context-suppressed signal;
• generate an audio context signal that is based on a first filter and a first plurality of sequences, each of the first plurality of sequences having a different time resolution, wherein the audio context signal is scaled based on at least one feature of the context-suppressed signal, and wherein scaling the audio context signal comprises scaling at least one coefficient of a first multiresolution-analysis (MRA) tree generated based on a second template MRA tree;
• and
• mix a first signal that is based on the generated audio context signal with a second signal that is based on the context-suppressed signal to obtain a context-enhanced signal,
• wherein said instructions which when executed by a processor cause the processor to generate an audio context signal include instructions which when executed by a processor cause the processor to apply the first filter to each of the first plurality of sequences.