A system capable of achieving time synchronization among a plurality of apparatuses provided at positions where they are unable to receive a GNSS signal is provided. A time synchronization system includes a reference time obtaining unit configured to obtain, based on a radio signal from a global navigation satellite system, a first timing signal and time information corresponding to timing indicated by the first timing signal, a modulator, connected to a line branched into a plurality of branches, configured to generate a modulated signal containing corresponding time information in synchronization with the first timing signal and to send the modulated signal over the line, at least one demodulator, connected to any branch of the line, configured to demodulate the modulated signal propagating over the line, and at least one transmitter configured to transmit a first radio signal compatible with the radio signal from the global navigation satellite system.

A sleep training clock can be configured to assist in sleep training. The sleep training clock is shaped like a robot having a face, a torso, and two legs; two LEDs disposed in the face and three LEDs disposed in the torso; and a digital clock face disposed in the torso. Additionally, circuitry for performing sleep training is configured to determine whether the electronic device is in a wake state and turn on the two LEDs disposed in the face and turn off the three LEDs disposed in the torso in response, determine whether the electronic device is in a sleep state and turn off the two LEDs disposed in the face and turn on the three LEDs disposed in the torso in response.

A vehicular apparatus operates a plurality of operating systems concurrently on a single hardware module. Each operating system is operated based on a corresponding own clock function holding a time. The vehicular apparatus is provided with a synchronization unit for synchronizing the times of the respective operating systems by issuing, to each operating system, a notification indicating a change in the time made in one operating system.

A system capable of achieving time synchronization among a plurality of apparatuses provided at positions where they are unable to receive a GNSS signal is provided. A time synchronization system includes a reference time obtaining unit configured to obtain, based on a radio signal from a global navigation satellite system, a first timing signal and time information corresponding to timing indicated by the first timing signal, a modulator, connected to a line branched into a plurality of branches, configured to generate a modulated signal containing corresponding time information in synchronization with the first timing signal and to send the modulated signal over the line, at least one demodulator, connected to any branch of the line, configured to demodulate the modulated signal propagating over the line, and at least one transmitter configured to transmit a first radio signal compatible with the radio signal from the global navigation satellite system.

A system and method for setting time and date in a device (e.g., a set top box (614), or similar client device) through a network connection when a network time standard server (606, 620) (e.g., a NTP server) is unavailable (e.g., blocked or blacklisted) are provided. The system and method of the present disclosure involves sending (404) a request over a network from a device for information from an Internet address (618), receiving (406) a packet (500) from the Internet address (618) in response to the request, extracting (408) time and date information from a header (502) in the packet (500), and using the extracted time and date information to set (416) the current time and date for the device.

A method for transmitting data from an electronic device to an electronic watch, including the following steps: emitting a sequence of light signals with a light source of the electronic device, each signal having a light-intensity level belonging to a set of at least four light-intensity levels, said sequence corresponding to a code of the data to be transmitted; detecting successive light-intensity levels with a phototransistor of the watch, so as to reconstitute the sequence; and decoding the sequence in order to reconstitute the data, the set of at least four intensity levels being divided into a first portion and a second portion, one light signal in two of the sequence having a light-intensity level belonging to the first portion, the other signals having a light-intensity level belonging to the second portion.

A method for transmitting data from an electronic device to an electronic watch, including the following steps: emitting a sequence of light signals with a light source of the electronic device, each signal having a light-intensity level belonging to a set of at least four light-intensity levels, said sequence corresponding to a code of the data to be transmitted; detecting successive light-intensity levels with a phototransistor of the watch, so as to reconstitute the sequence; and decoding the sequence in order to reconstitute the data, the set of at least four intensity levels being divided into a first portion and a second portion, one light signal in two of the sequence having a light-intensity level belonging to the first portion, the other signals having a light-intensity level belonging to the second portion.

The present invention relates to an electronic watch allowing data to be received, comprising: An electrical energy source A control member arranged to be supplied with power by the electrical energy source A receiver module comprising: An optical sensor capable of detecting a sequence of light pulses modulated by data, and of converting said sequence into a digital signal An energy storage element arranged to store electrical energy generated by the optical sensor A demodulator arranged to be supplied with power by the energy storage element, capable of extracting the data from the digital signal Transmission means capable of transmitting the extracted data to the control member.

The present invention relates to an electronic watch allowing data to be received, comprising: An electrical energy source A control member arranged to be supplied with power by the electrical energy source A receiver module comprising: An optical sensor capable of detecting a sequence of light pulses modulated by data, and of converting said sequence into a digital signal An energy storage element arranged to store electrical energy generated by the optical sensor A demodulator arranged to be supplied with power by the energy storage element, capable of extracting the data from the digital signal Transmission means capable of transmitting the extracted data to the control member.

A receiving apparatus is provided. The receiving apparatus includes circuitry configured to receive reference time information and metadata including information for executing processing related to the reference time information. The circuitry is configured to execute processing related to the reference time information based on the metadata. The metadata includes a first offset value between the reference time information and a discontinuous time, a second offset value between the discontinuous time and a local time, and a date and time at which a change in a daylight savings time (DST) status is to occur. The local time is determined based on the reference time information and the metadata.