摘要:
An acoustic communication method and device are provided that filter an audio signal to attenuate a high frequency section of the audio signal. A residual signal is generated that corresponds to a difference between the audio signal and the filtered signal. A psychoacoustic mask is generated for the audio signal based on a predetermined psychoacoustic model. A psychoacoustic spectrum mask is generated by combining the residual signal with the psychoacoustic mask, an acoustic communication signal is generating by modulating digital data according to the acoustic signal spectrum mask, the acoustic communication signal is combined with the filtered signal, and radiating, by a speaker, the combined acoustic communication signal and the filtered signal in a form of sound waves.
摘要:
An encoder includes a precoder for encoding an input information object according to a preset encoding scheme and storing the encoded information object in a precoder buffer, a sample number/address generation unit for generating a sample number of each sample and an address, which corresponds to each bit of each sample and the address of the precoder buffer, a multiplexer for selecting a bit of the precoder buffer corresponding to the address generated by the sample number/address generation module, a sampling buffer for storing a bit of each sample output from the multiplexer, a control packet generation module for generating a control packet including information on the sample number generated by the sample number/address generation module, a packet assembling unit for assembling the sample stored in the sampling buffer with the control packet generated by the control data generation module, and a modulation module for modulating the packet output from the packet assembling unit into a sound signal according to a preset scheme.
摘要:
A method for transmitting, by a mobile device, a data object, is provided, and includes estimating expected transmission times required for transmitting an object between devices by an acoustic communication link and supported radio interfaces, based on a size of the object, transmitting the object through an acoustic communication channel when the link is estimated to provide a shortest expected transmission time, and determining rankings of the radio interfaces according to the expected transmission times when the acoustic communication link does not provide a shortest expected transmission time, transmitting rankings information and configuration information on the supported radio interfaces through the acoustic communication channel by a configuration container, and transmitting the object through a radio interface through which a response is received.
摘要:
A method for encoding an information object in a communication system by storing the information object in a buffer; generating a sampling set including bits randomly selected from the buffer and bits regularly selected from the buffer; generating control channel data including a sampling set number of the sampling set and size information for the information object; and modulating the sampling set and the control channel data.
摘要:
A method for transmitting, by a mobile device, a data object, is provided, and includes estimating expected transmission times required for transmitting an object between devices by an acoustic communication link and supported radio interfaces, based on a size of the object, transmitting the object through an acoustic communication channel when the link is estimated to provide a shortest expected transmission time, and determining rankings of the radio interfaces according to the expected transmission times when the acoustic communication link does not provide a shortest expected transmission time, transmitting rankings information and configuration information on the supported radio interfaces through the acoustic communication channel by a configuration container, and transmitting the object through a radio interface through which a response is received.
摘要:
Disclosed is an acoustic communication method that includes filtering an audio signal to attenuate a high frequency section of the audio signal; generating a residual signal which corresponds to a difference between the audio signal and the filtered signal; generating a psychoacoustic mask for the audio signal based on a predetermined psychoacoustic model; generating a psychoacoustic spectrum mask by combining the residual signal with the psychoacoustic mask; generating an acoustic communication signal by modulating digital data according to the acoustic signal spectrum mask; and combining the acoustic communication signal with the filtered signal.
摘要:
An apparatus and method for wireless communication using an acoustic signal in a system including a first device including a loudspeaker and a second device including a microphone. The first device generates wireless communication information, converts the wireless communication information to an acoustic signal, and transmits the acoustic signal to the second device using the loudspeaker. The second device receives the acoustic signal using the microphone, extracts the wireless communication information from the acoustic signal, generates an acknowledgment signal according to the extracted wireless communication information, and transmits the acknowledgment signal to the first device on a wireless communication channel.
摘要:
A wireless charging method includes synchronizing power phases of at least two charging power supply devices, and wirelessly charging a terminal using the at least two charging power supply devices.
摘要:
A bidirectional wireless charging method includes performing a mode change to a requesting electronic device if charging is necessary, requesting charging from at least one electronic device, receiving status information from the at least one electronic device that has received the charging request, selecting the electronic device based on the status information, and performing charging by receiving power supplied from the selected at least one electronic device.
摘要:
A wireless charging method and apparatus wirelessly charges power between separate electronic appliances. The wireless charging method includes searching for at least one chargeable electronic device, receiving status information from the searched at least one electronic device, determining whether the electronic device is a power supply electronic device or a power demand electronic device, receiving a supply of power from the searched at least one electronic device if the electronic device is determined to be the power demand electronic device, and supplying the power to the at least one electronic device if the electronic device is determined to be the power supply electronic device.