Abstract:
A device and a method for realizing accurate TTML subtitle data display control are provided. A TTML subtitle data storage packet storing TTML subtitle data as payload of a MMT packet defined in the MMT format, and a signaling message including subtitle-related information corresponding to the TTML subtitle data are transmitted from a transmission device to a reception device. The signaling message defines therein a time mode (TMD) as subtitle display timing control mode, and an operation mode (OPM) of selectively performing instant display of subtitles or TTML description-based display thereof, and the reception device can conduct display control in a designated mode.
Abstract:
There is provided a receiving apparatus including circuitry that is configured to receive a broadcasting wave that transfers digital data according to an IP (Internet Protocol) having a protocol stack of layers, wherein the circuitry is further configured to implement a first decoder that uses a first key transferred in a first control signal at a first layer to decode a second key acquired in a second control signal transferred at a second layer, the second layer being a higher layer than the first layer in the protocol stack, and a second decoder that uses the decoded second key to decode an encoded component that configures a particular broadcasting service which is included in a stream obtained through the broadcasting wave.