Provided herein are system, apparatus, device, method and/or computer program product embodiments, and/or combinations and sub-combinations thereof, for transmitting messages to a display device based on detected audio output from the display device. In a given embodiment, a digital media player can transmit a message to the display device to control the audio output of the speaker using a transmission protocol, and transmit a set of instructions to the remote control device to confirm the display device processed the message by determining whether an attribute associated with the audio output from the speaker is within a predetermined threshold. In response to receiving a message that an attribute associated with the audio output is within a predetermined threshold, the digital media player can determine that the display device is enabled to receive communication via the transmission protocol.

An audio transmission system of the present invention includes: an unmanned aircraft; a steering terminal that is used to steer the unmanned aircraft; and an information terminal configured to access a server providing a service for translating text data created in an official language of a country into a designated language other than the official language, and converting the translated text data into audio data, the information terminal being able to download the audio data from the server. The information terminal transmits the audio data in the designated language downloaded from the server to the unmanned aircraft, and the unmanned aircraft outputs the audio data in the designated language as an audio message from a speaker attached to an airframe.

An audio transmission system of the present invention includes: an unmanned aircraft; a steering terminal that is used to steer the unmanned aircraft; and an information terminal configured to access a server providing a service for translating text data created in an official language of a country into a designated language other than the official language, and converting the translated text data into audio data, the information terminal being able to download the audio data from the server. The information terminal transmits the audio data in the designated language downloaded from the server to the unmanned aircraft, and the unmanned aircraft outputs the audio data in the designated language as an audio message from a speaker attached to an airframe.

A self-adjusting spherical speaker includes a remote control handle, a megaphone, a vibration sensor, an alarm, a spherical speaker body and a digital signal processor. The remote control handle is provided for issuing a manual control signal according to user's input; the digital signal processor controls a playing mode of the spherical speaker body according to the manual control signal; the vibration sensor is provided for detecting the amplitude of vibration of a police car body. If the digital signal processor determines that the amplitude of vibration of the police car body is greater than a predetermined vibration threshold, the alarm will be controlled to carry out an alarm operation, and the digital signal processor will convert a user's voice received by the megaphone into an electrical control signal to control the playing mode of the spherical speaker. Therefore, the operating mode of the spherical speaker can be self-adjusted.

A self-adjusting spherical speaker includes a remote control handle, a megaphone, a vibration sensor, an alarm, a spherical speaker body and a digital signal processor. The remote control handle is provided for issuing a manual control signal according to user's input; the digital signal processor controls a playing mode of the spherical speaker body according to the manual control signal; the vibration sensor is provided for detecting the amplitude of vibration of a police car body. If the digital signal processor determines that the amplitude of vibration of the police car body is greater than a predetermined vibration threshold, the alarm will be controlled to carry out an alarm operation, and the digital signal processor will convert a user's voice received by the megaphone into an electrical control signal to control the playing mode of the spherical speaker. Therefore, the operating mode of the spherical speaker can be self-adjusted.

An audio sharing system is configured to operate in at least two modes of operation. In a private mode, the audio sharing system outputs sound only to a user and may isolate the user from the surrounding acoustic environment. In a public mode of operation, the audio sharing system broadcasts sound to the user and to any other listeners in proximity to the user, thereby sharing sound in a social manner. The audio sharing system may also operate in other modes of operation that allow the selective sharing of sounds.

An audio sharing system is configured to operate in at least two modes of operation. In a private mode, the audio sharing system outputs sound only to a user and may isolate the user from the surrounding acoustic environment. In a public mode of operation, the audio sharing system broadcasts sound to the user and to any other listeners in proximity to the user, thereby sharing sound in a social manner. The audio sharing system may also operate in other modes of operation that allow the selective sharing of sounds.

Provided herein are system, apparatus, device, method and/or computer program product embodiments, and/or combinations and sub-combinations thereof, for transmitting messages to a display device based on detected audio output from the display device. In a given embodiment, a digital media player can transmit a message to the display device to control the audio output of the speaker using a transmission protocol, and transmit a set of instructions to the remote control device to confirm the display device processed the message by determining whether an attribute associated with the audio output from the speaker is within a predetermined threshold. In response to receiving a message that an attribute associated with the audio output is within a predetermined threshold, the digital media player can determine that the display device is enabled to receive communication via the transmission protocol.

Provided herein are system, apparatus, device, method and/or computer program product embodiments, and/or combinations and sub-combinations thereof, for transmitting messages to a display device based on detected audio output from the display device. In a given embodiment, a digital media player can transmit a message to the display device to control the audio output of the speaker using a transmission protocol, and transmit a set of instructions to the remote control device to confirm the display device processed the message by determining whether an attribute associated with the audio output from the speaker is within a predetermined threshold. In response to receiving a message that an attribute associated with the audio output is within a predetermined threshold, the digital media player can determine that the display device is enabled to receive communication via the transmission protocol.

Disclosed are an emergency vehicle supporting device and system using a drone that resolve forward traffic congestion on a road on which an emergency vehicle is driving via the drone and supports securing of a driving path for the emergency vehicle. According to the present invention, an emergency vehicle supporting device mounted on the emergency vehicle generates drone control information and transmits the generated drone control information to the drone. Further, the drone flies according to the drone control information and a location change of the emergency vehicle and broadcasts an avoidance warning to surrounding vehicles around the flying drone, so that the surrounding vehicles may help the emergency vehicle secure a driving path and thus the emergency vehicle may arrive at a destination within a desired time.