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US 11,081,120 B2Granted
Encoded-sound determination method
AssigneeFujitsu Limited
InventorsAkira Kamano, Masanao Suzuki, Nobuyuki Washio, Yohei Kishi
Life of this patent
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Abstract
A method for encoded-sound determination performed by a computer includes: executing a first process that includes obtaining information indicating intensities of sound signals, the frequencies being calculated from the sound signals and corresponding to frequencies; and executing a second process that includes determining whether or not the sound signals are signals of encoded sound, based on whether or not the intensities of the sound signals in predetermined frequency bands that are adjacent to each other in a frequency direction have a difference that is larger than or equal to a predetermined threshold.
Claims17
A method for encoded-sound determination performed by a computer, the method comprising:
- executing a first process that includes
- obtaining a first average intensity corresponding to a first frequency band of a sound signal, and
- obtaining a second average intensity corresponding to a second frequency band of the sound signal, the second frequency band being adjacent to the first frequency band via a boundary frequency and being higher than the first frequency band;
- and
- executing a second process that includes
- obtaining a ratio between the first average intensity and the second average intensity, and
- determining, by using the obtained ratio, whether the sound signal represents encoded sound, to output a signal corresponding to a determination result to an other device as a notification outputted visually or audibly from the other device or as a notification causing the other device to perform processing corresponding to the determination result,
- wherein the second process is configured to cause processor circuitry of the computer to repeat the determination as to whether or not the sound signals are signals of encoded sound after a value indicating a difference between the intensities of the sound signals in adjacent predetermined frequency bands exceeds a second predetermined value until a value indicating the intensities in the predetermined frequency bands that are adjacent to each other at a same frequency band boundary as a frequency band boundary at which the value indicating the difference exceeds the second predetermined value becomes smaller than or equal to the second predetermined value a predetermined number of times or more.
5 more elements
A non-transitory computer-readable storage medium for storing a program which causes a processor to perform processing for encoded- sound determination, the processing comprising:
- executing a first process that includes
- obtaining a first average intensity corresponding to a first frequency band of a sound signal, and
- obtaining a second average intensity corresponding to a second frequency band of the sound signal, the second frequency band being adjacent to the first frequency band via a boundary frequency and being higher than the first frequency band;
- and
- executing a second process that includes
- obtaining a ratio between the first average intensity and the second average intensity, and
- determining, by using the obtained ratio, whether the sound signal represents encoded sound, to output a signal corresponding to a determination result to an other device as a notification outputted visually or audibly from the other device or as a notification causing the other device to perform processing corresponding to the determination result,
- wherein the second process is configured to cause the processor to repeat the determination as to whether or not the sound signals are signals of encoded sound after a value indicating a difference between the intensities of the sound signals in adjacent predetermined frequency bands exceeds a second predetermined value until a value indicating the intensities in the predetermined frequency bands that are adjacent to each other at a same frequency band boundary as a frequency band boundary at which the value indicating the difference exceeds the second predetermined value becomes smaller than or equal to the second predetermined value a predetermined number of times or more.
5 more elements
An apparatus for encoded-sound determination, the apparatus comprising:
- a memory;
- and
- a processor coupled to the memory;
- the processor being configured to execute a first process that includes
- obtaining a first average intensity corresponding to a first frequency band of a sound signal, and
- obtaining a second average intensity corresponding to a second frequency band of the sound signal, the second frequency band being adjacent to the first frequency band via a boundary frequency and being higher than the first frequency band;
- and
- execute a second process that includes
- obtaining a ratio between the first average intensity and the second average intensity, and
- determining, by using the obtained ratio, whether the sound signal represents encoded sound, to output a signal corresponding to a determination result to an other device as a notification outputted visually or audibly from the other device or as a notification causing the other device to perform processing corresponding to the determination result,
- wherein the second process is configured to cause the processor to repeat the determination as to whether or not the sound signals are signals of encoded sound after a value indicating a difference between the intensities of the sound signals in adjacent predetermined frequency bands exceeds a second predetermined value until a value indicating the intensities in the predetermined frequency bands that are adjacent to each other at a same frequency band boundary as a frequency band boundary at which the value indicating the difference exceeds the second predetermined value becomes smaller than or equal to the second predetermined value a predetermined number of times or more.
8 more elements
Dependencies are inferred from the claim text.