1. A classification apparatus comprising:
a memory that stores a phenomenon relating to a situation around a device on which a sensor is mounted and an image of a two-dimensional Fourier transform of a spectrogram of a time variation signal detected in relation to the phenomenon, as a template image, to be associated with each other; and
a processor acting as:
a spectrogram generation unit that generates the spectrogram of the time variation signal of a classification object by processing the time variation signal of the classification object obtained by the sensor;
a two-dimensional Fourier transform calculation unit that calculates the two-dimensional Fourier transform of the spectrogram generated by the spectrogram generation unit;
a similarity calculation unit that calculates a similarity between the template image and an image of the two-dimensional Fourier transform obtained by the two-dimensional Fourier transform calculation unit, for each template image corresponding to each phenomenon stored in the template image memorizing unit;
a determination unit that determines whether the time variation signal of the classification object conforms to any of one or more phenomena, on the basis of the similarity calculated by the similarity calculation unit;
a characteristic memorizing unit that stores periodicity characteristics included in the two-dimensional Fourier transform of the spectrogram of the time variation signal detected in relation to the phenomenon, as a template characteristics, with regard to each of one or more phenomena;
a characteristic detection unit that detects the periodicity characteristics from an image of the two-dimensional Fourier transform obtained by the two-dimensional Fourier transform calculation unit; and
a specification unit that specifies one similar to the periodicity characteristics detected by the characteristic detection unit, from among the template characteristics stored in the characteristic memorizing unit,
wherein the determination unit determines that the time variation signal of the classification object conforms to the phenomenon corresponding to the template characteristics specified by the specification unit, in a case where the template characteristics similar to the periodicity characteristics detected by the characteristic detection unit is specified by the specification unit, and
wherein in a case where the template characteristics similar to the periodicity characteristics detected by the characteristic detection unit is not specified by the specification unit, the similarity calculation is performed by the similarity calculation unit.
2. The classification apparatus according to claim 1, wherein
the characteristic detection unit obtains from the image of the two-dimensional Fourier transform obtained by the two-dimensional Fourier transform calculation unit a pixel value distribution on a horizontal axis passing through a center of the image and extracts white points based on the pixel value distribution so as to obtain intervals between the white points adjacent to each other.
3. The classification apparatus according to claim 1,
wherein the time variation signal of the classification object is one of an audio signal, an acceleration signal or a pressure signal.
4. A non-transitory computer readable medium storing a program causing a computer to execute a process for classification, the process comprising:
storing a phenomenon relating to a situation around a device on which a sensor is mounted and an image of a two-dimensional Fourier transform of a spectrogram of a time variation signal detected in relation to the phenomenon, as a template image, to be associated with each other;
generating the spectrogram of the time variation signal of a classification object by processing the time variation signal of the classification object obtained by the sensor;
calculating the two-dimensional Fourier transform of the generated spectrogram;
calculating a similarity between the template image and an image of the obtained two-dimensional Fourier transform, for each template image corresponding to each stored phenomenon;
determining whether the time variation signal of the classification object conforms to any of one or more phenomena, on the basis of the calculated similarity;
storing periodicity characteristics included in the two-dimensional Fourier transform of the spectrogram of the time variation signal detected in relation to the phenomenon, as a template characteristics. with regard to each of one or more phenomena;
detecting the periodicity characteristics from an image of the two-dimensional Fourier transform obtained by the calculating the two-dimensional Fourier transform of the generated spectrogram; and
specifying one similar to the periodicity characteristics detected detecting, from among the template characteristics stored by the storing,
wherein the determining determines that the time variation signal of the classification object conforms to the phenomenon corresponding to the template characteristics specified by the specifying, in a case where the template characteristics similar to the periodicity characteristics detected by the detecting is specified by the specifying, and
wherein in a case where the template characteristics similar to the periodicity characteristics detected by the detecting is not specified by the specifying, the similarity calculation is performed by the calculating of the similarity between the template image and an image of the obtained two-dimensional Fourier transform.
5. The non-transitory computer readable medium according to claim 4, wherein the time variation signal of the classification object is one of an audio signal, an acceleration signal or a pressure signal.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A remotely-activated vehicle priority system, comprising:
a control center adapted to transmit an activation message;
a vehicle-priority communication device mounted to a vehicle and communicatively coupled to the control center, the vehicle-priority communication device adapted to transmit a priority preemption request in response to the activation message;
at least one receiver situated at a traffic signal and adapted to receive the priority preemption request; and
a phase selector coupled to the at least one receiver and adapted to issue, responsive to the priority preemption request, a command to a controller of the traffic signal, wherein the command selects a phase for the traffic signal.
2. The remotely-activated vehicle priority system of claim 1, wherein the activation message is an activation command.
3. The remotely-activated vehicle priority system of claim 1, wherein a mobile data terminal is associated with the vehicle and the activation message is a portion of data transmitted from the control center to the mobile data terminal.
4. The remotely-activated vehicle priority system of claim 1, wherein the control center is further adapted to transmit a deactivation message and the vehicle-priority communication device is further adapted to terminate the transmission of the priority preemption request in response to the deactivation message.
5. The remotely-activated vehicle priority system of claim 4, wherein the deactivation message includes coordinates of a destination for the vehicle and the vehicle-priority communication device is further adapted to terminate the transmission of the priority preemption request in response to the vehicle approaching the destination.
6. The remotely-activated vehicle priority system of claim 5, further comprising a global positioning satellite (GPS) receiver associated with the vehicle, wherein the vehicle-priority communication device is further adapted to determine that the vehicle is approaching the destination from the coordinates of the destination and coordinates from the GPS receiver.
7. The remotely-activated vehicle priority system of claim 1, further comprising a global positioning satellite (GPS) receiver associated with the vehicle, wherein the vehicle-priority communication device is further adapted to transmit coordinates of the vehicle from the GPS receiver to the control center.
8. The remotely-activated vehicle priority system of claim 7, wherein the control center is further adapted to transmit the activation message in response to the coordinates of the vehicle.
9. The remotely-activated vehicle priority system of claim 8, wherein the vehicle is a mass transit vehicle having an operating schedule and the control center is further adapted to transmit the activation message in response to the mass transit vehicle lagging behind the operating schedule.
10. The remotely-activated vehicle priority system of claim 7, wherein the control center is further adapted to transmit a deactivation message in response to the coordinates of the vehicle and the vehicle-priority communication device is further adapted to terminate the transmission of the priority preemption request in response to the deactivation message.
11. The remotely-activated vehicle priority system of claim 10, wherein the vehicle is a mass transit vehicle having an operating schedule and the control center is further adapted to transmit the deactivation message in response to the mass transit vehicle not lagging behind the operating schedule.
12. The remotely-activated vehicle priority system of claim 1, wherein the priority preemption request includes an identifier of the vehicle.
13. The remotely-activated vehicle priority system of claim 12, wherein the control center is further adapted to transmit an identifier update message and the vehicle-priority communication device is further adapted to update the identifier of the vehicle in response to the identifier update message.
14. The remotely-activated vehicle priority system of claim 1, wherein the control center is further adapted to transmit a firmware update message and the vehicle-priority communication device is further adapted to update firmware controlling the operation of the vehicle-priority communication device in response to the firmware update message.
15. The remotely-activated vehicle priority system of claim 1, wherein the control center is further adapted to transmit a diagnostic retrieval message, and the vehicle-priority communication device is further adapted to transmit diagnostic data to the control center in response to the diagnostic retrieval message.
16. A method for remotely activating a vehicle priority system, comprising:
transmitting an activation message from a remote control center;
receiving the activation message at a vehicle-priority communication device mounted to a vehicle;
transmitting a priority preemption request from the vehicle-priority communication device in response to the activation message;
receiving the priority preemption request at a receiver situated proximate to a traffic signal; and
requesting a phase for the traffic signal in response to the priority preemption request.
17. The method of claim 16, further comprising:
transmitting a deactivation message from the remote control center;
receiving the deactivation message at the vehicle-priority communication device; and
terminating the transmission of the priority preemption request from the vehicle-priority communication device in response to the deactivation message.
18. The method of claim 17, further comprising determining a position of the vehicle using a global positioning satellite (GPS) receiver, wherein the deactivation message is transmitted in response to the position of the vehicle.
19. The method of claim 16, further comprising determining a position of the vehicle using a global positioning satellite (GPS) receiver, wherein the activation message is transmitted in response to the position of the vehicle.
20. A remotely-activated vehicle priority system, comprising:
means for transmitting an activation message from a remote control center;
means for receiving the activation message at a vehicle-priority communication device mounted to a vehicle;
means for transmitting a priority preemption request from the vehicle-priority communication device in response to the activation message;
means for receiving the priority preemption request at a receiver situated proximate to a traffic signal; and
means for requesting a phase for the traffic signal in response to the priority preemption request.