Electronic apparatus and control method thereof
AssigneeSamsung Electronics Co., Ltd.
InventorJong-woo Kim
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Abstract
An electronic apparatus is disclosed, which includes an input interface configured to receive an audio signal, a processor configured to process the received audio signal, and an output interface configured to output the processed audio signal, in which the processor is configured to obtain a scale of a first octave by applying a filter bank to the audio signal based on a sampling frequency of the audio signal; down-sample the audio signal; and obtain a scale of a second octave lower than the first octave by applying the filter bank to the down-sampled signal.
Claims18
An electronic apparatus, comprising:
- an output interface,
- wherein the processor is configured to control the output interface to output an audio signal and identify scales included in the audio signal by applying a plurality of digital filters to the audio signal based on a sampling frequency of the audio signal,
- wherein the processor is further configured to:
- identify scales of a first octave by applying the plurality of digital filters to the audio signal;
- and
- down-sample the audio signal and identify scales of a second octave lower than the first octave by applying the plurality of digital filters to the down-sampled audio signal,
- wherein each of center frequencies of the plurality of digital filters is reduced in proportion to the sampling frequency of the audio signal.
A method of controlling an electronic apparatus, the method comprising:
- outputting an audio signal;
- and
- identifying scales included in the audio signal by applying a plurality of digital filters to the audio signal based on a sampling frequency of the audio signal,
- the identifying scales included in the audio signal comprises:
- identifying scales of a first octave by applying the plurality of digital filters to the audio signal;
- down-sampling the audio signal, and
- identifying scales of a second octave that is lower than the first octave by applying the plurality of digital filters to the down-sampled audio signal,
- wherein each of the center frequencies of the plurality of digital filters is reduced in proportion to the sampling frequency of the audio signal.
A non-transitory computer readable storage medium storing a program that is executable by a computer to perform a method for controlling an electronic apparatus, wherein the method comprises:
- outputting an audio signal;
- and
- identifying scales included in the audio signal by applying a plurality of digital filters to the audio signal based on a sampling frequency of the audio signal,
- the identifying scales included in the audio signal comprises:
- identifying scales of a first octave by applying the plurality of digital filters to the audio signal;
- down-sampling the audio signal;
- and
- identifying scales of a second octave that is lower than the first octave by applying the plurality of digital filters to the down-sampled audio signal,
- wherein each of the center frequencies of the plurality of digital filters is reduced in proportion to the sampling frequency of the audio signal.
An electronic apparatus, comprising:
- an input interface configured to receive an audio signal;
- a processor comprising:
- a filter bank configured to identify scales of a first octave by applying a plurality of digital filters to the audio signal based on a sampling frequency of the audio signal;
- at least one down-sampler configured to down-sample the audio signal;
- wherein the filter bank is further configured to identify scales of a second octave that is lower than the first octave by applying the plurality of digital filters to the down-sampled audio signal,
- wherein each of center frequencies of the plurality of digital filters is reduced in proportion to the sampling frequency of the audio signal.
Dependencies are inferred from the claim text.