A system and method provide an enhanced listening experience for a user and a radio receiver or other device that receives broadcast or streamed content having a plurality of program channels. The method and system buffer designated channels at the receiver and, when switching among channels, play back the buffered designated channels during reception from a selected point therein depending on the channel or other criteria. When switching to a different channel during reception, a user is able to hear content in a buffered program channel with music from the start of a song, for example, whereas content in a channel with news, talk radio, or live sports is played back from live reception, even though the content segments are transmitted a different start times relative to thier selected times for playback following a channel change. User controls allow navigation among buffered designated channels during reception.

The present invention is directed to a digital broadcast system and a data processing method. A broadcast signal in which mobile service data and main service data are multiplexed is transmitted and received. Then, in a broadcasting receiver, the program table information describing channel information and event information of the mobile service data according to an identifier of an ensemble in which the mobile service data are multiplexed, in the received broadcast signal. And the mobile service data is outputted by using the parsed program table information.

A system or computer usable program product for representing a piece of a road as a first ordered series of line segments connected in an end-to-end fashion; representing the piece of the road as a second ordered series of line segments connected in an end-to-end fashion; for each given pair of two consecutive points of the second ordered series of points, determining a corresponding plurality of in-between points from the first ordered series of points; for each given line segment of the second ordered series of line segments, determining a first traffic characteristic value corresponding to the given line segment and a portion of the piece of the road which the given line segment represents; and presenting a visual representation of the piece of the road.

Embodiments of this application disclose a relay transmission method and system, and a related device. The method includes: determining, by a relay terminal, a vehicle existing between a vehicle terminal i and a vehicle terminal j based on vehicle location information in received broadcast messages sent by N vehicle terminals; and when it is obtained through calculation that link quality of a communication link R.sub.ij used when the vehicle terminal i and the vehicle terminal j communicate with each other is lower than a preset threshold, forwarding, to the vehicle terminal j, a broadcast message sent by the vehicle terminal i, and forwarding, to the vehicle terminal i, a broadcast message sent by the vehicle terminal j. A relay forwarding function of the relay terminal avoids communication interruption or communication distance limitation caused by blocking due to dynamic and unpredictable factors such as a large vehicle within the Internet of vehicles, thereby improving reliability of message transmission within the Internet of vehicles.

Embodiments of this application disclose a relay transmission method and system, and a related device. The method includes: determining, by a relay terminal, a vehicle existing between a vehicle terminal i and a vehicle terminal j based on vehicle location information in received broadcast messages sent by N vehicle terminals; and when it is obtained through calculation that link quality of a communication link R.sub.ij used when the vehicle terminal i and the vehicle terminal j communicate with each other is lower than a preset threshold, forwarding, to the vehicle terminal j, a broadcast message sent by the vehicle terminal i, and forwarding, to the vehicle terminal i, a broadcast message sent by the vehicle terminal j. A relay forwarding function of the relay terminal avoids communication interruption or communication distance limitation caused by blocking due to dynamic and unpredictable factors such as a large vehicle within the Internet of vehicles, thereby improving reliability of message transmission within the Internet of vehicles.

Travel-related-information messages (TRIMS) are received from one or more information sources, and information included in the messages is separated into a first (e.g. TPEG) or second (e.g. TPEG+) group. A broadcast area to which the information included in the TRIMs is to be broadcast is determined. A further determination indicates that a subset of information assigned to the first group is to be reassigned to the second group. The subset of information is reassigned from the first group to the second group based on parameters associated with the broadcast area. The information included in the first group and the second group is delivered to one or more processing modules that generate a first TRIM reporting message using information included in the first group and a second TRIM reporting message using information included in the second group.

Travel-related-information messages (TRIMS) are received from one or more information sources, and information included in the messages is separated into a first (e.g. TPEG) or second (e.g. TPEG+) group. A broadcast area to which the information included in the TRIMs is to be broadcast is determined. A further determination indicates that a subset of information assigned to the first group is to be reassigned to the second group. The subset of information is reassigned from the first group to the second group based on parameters associated with the broadcast area. The information included in the first group and the second group is delivered to one or more processing modules that generate a first TRIM reporting message using information included in the first group and a second TRIM reporting message using information included in the second group.

A digital broadcast system and a data processing method are disclosed. A receiving system of the digital broadcast system includes a signal receiving unit, a demodulating unit, a program table decoder, and a controller. The signal receiving unit receives a broadcast signal in which at least one parade and main service data are multiplexed, each parade including mobile service data and data of at least one section of a program table for decoding the mobile service data. The demodulating unit demodulates data of at least one parade included in the broadcast signal. The program table decoder scans at least one demodulated parade, receives each section of the program table from the scanned parade to construct a corresponding program table, and parses the constructed program table to output program table information. The controller controls decoding of the demodulated mobile service data according to the parsed program table information.

A digital broadcast system and a data processing method are disclosed. A receiving system of the digital broadcast system includes a signal receiving unit, a demodulating unit, a program table decoder, and a controller. The signal receiving unit receives a broadcast signal in which at least one parade and main service data are multiplexed, each parade including mobile service data and data of at least one section of a program table for decoding the mobile service data. The demodulating unit demodulates data of at least one parade included in the broadcast signal. The program table decoder scans at least one demodulated parade, receives each section of the program table from the scanned parade to construct a corresponding program table, and parses the constructed program table to output program table information. The controller controls decoding of the demodulated mobile service data according to the parsed program table information.

Systems, methods, and apparatuses are provided for transmitting map data images in a limited bandwidth environment. In one embodiment, the method comprises determining or predicting, using a processor, a traffic condition or a weather condition for a location. The method further comprises developing at least one map image depicting the traffic condition or weather condition. The method further comprises encoding the map image in at least one payload. The method further comprises transmitting the at least one payload over-the-air to a navigation device.