A method is described for the locationally selective transmission of a signal by radio. Both a transmitter and a receiver are synchronized to the same time reference. The receiver receiving and demodulating, at a time that is one of the specified times of the time reference, a signal transmitted by the transmitter, if the receiver has received the signal at a time that is one of the specified times. The method includes the transmitter determining a receive location within a receive zone to which it wishes to transmit the signal in selective fashion, a position in the receive zone being a function of a position of the transmitter and a signal runtime. The method also includes the transmitter transmitting the signal; and the receiver, which is situated inside the receive zone, receives and demodulates the signal.

A method is described for the locationally selective transmission of a signal by radio. Both a transmitter and a receiver are synchronized to the same time reference. The receiver receiving and demodulating, at a time that is one of the specified times of the time reference, a signal transmitted by the transmitter, if the receiver has received the signal at a time that is one of the specified times. The method includes the transmitter determining a receive location within a receive zone to which it wishes to transmit the signal in selective fashion, a position in the receive zone being a function of a position of the transmitter and a signal runtime. The method also includes the transmitter transmitting the signal; and the receiver, which is situated inside the receive zone, receives and demodulates the signal.

A method is described for the locationally selective transmission of a signal by radio. Both a transmitter and a receiver are synchronized to the same time reference. The receiver receiving and demodulating, at a time that is one of the specified times of the time reference, a signal transmitted by the transmitter, if the receiver has received the signal at a time that is one of the specified times. The method includes the transmitter determining a receive location within a receive zone to which it wishes to transmit the signal in selective fashion, a position in the receive zone being a function of a position of the transmitter and a signal runtime. The method also includes the transmitter transmitting the signal; and the receiver, which is situated inside the receive zone, receives and demodulates the signal.

A method for emergency communication includes encoding a message for visual display including a message to field and a message from field. The visual display is revealed to a reading device in communication with a broadcast center, which stores the visual display. The messages are decoded and sorted from visual displays at the broadcast center. On an index channel, a time and channel number for when a message body of the message will be broadcast on a message channel is broadcasted. The message body is broadcasted on the message channel.

A method for emergency communication includes encoding a message for visual display including a message to field and a message from field. The visual display is revealed to a reading device in communication with a broadcast center, which stores the visual display. The messages are decoded and sorted from visual displays at the broadcast center. On an index channel, a time and channel number for when a message body of the message will be broadcast on a message channel is broadcasted. The message body is broadcasted on the message channel.

Techniques are described for expanding and/or improving the Advanced Television Systems Committee (ATSC) 3.0 television protocol in robustly delivering the next generation broadcast television services. An empty x-link period is provided at the end of an MPD to alert a newly tuning in receiver to obtain and insert a replacement ad in the period.

Techniques are described for expanding and/or improving the Advanced Television Systems Committee (ATSC) 3.0 television protocol in robustly delivering the next generation broadcast television services. An empty x-link period is provided at the end of an MPD to alert a newly tuning in receiver to obtain and insert a replacement ad in the period.

The present technology relates to a reception apparatus, a reception method, a transmission apparatus, and a transmission method that make it possible to do a promotion for a non-subscriber to a pay broadcast service more flexibly. The reception apparatus receives broadcast content that is provided as a pay broadcast service and transmitted in a scrambled manner, acquires a subscription check application for checking presence of a subscription to the pay broadcast service depending on information indicating presence of the subscription check application, the information being included in control information including information regarding a structure of the broadcast content, and controls an operation of the subscription check application. The present technology is applicable, for example, to a television receiver capable of receiving a digital broadcast signal.

The present technology relates to a reception apparatus, a reception method, a transmission apparatus, and a transmission method that make it possible to do a promotion for a non-subscriber to a pay broadcast service more flexibly. The reception apparatus receives broadcast content that is provided as a pay broadcast service and transmitted in a scrambled manner, acquires a subscription check application for checking presence of a subscription to the pay broadcast service depending on information indicating presence of the subscription check application, the information being included in control information including information regarding a structure of the broadcast content, and controls an operation of the subscription check application. The present technology is applicable, for example, to a television receiver capable of receiving a digital broadcast signal.

A reception apparatus includes a memory configured to store a television receiver application. The reception apparatus further includes processing circuitry configured to display, via a television broadcaster application, a user interface that provides a plurality of services for user selection. The processing circuitry is further configured to receive a user selection of a service from the plurality of displayed services. The processing circuitry is further configured to determine whether the selected service is an Advanced Television Systems Committee (ATSC) 1.0 service. In response to the determination that the selected service is the ATSC 1.0 service, the processing circuitry is further configured to continue execution of the television broadcaster application along with a display of the contents of the selected service.