Physical layer signalling for digital broadcast system

摘要

The present invention relates to a physical layer signalling in a digital broadcast network. In particular, for a digital broadcast network supporting a configuration with a plurality of physical layer pipes, a type indicator is signalled on physical layer for a pipe, the type indicator indicates the format of the input stream which may specify a transport stream, a generic stream or an IP stream. In addition, per physical layer pipe application of header and/or content compression to the user packet headers of the input stream is signalled. Another physical layer parameters are advantageously provided or extended in order to increase the flexibility and efficiency of the layer 1 signalling.

主权项

1. A transmitting apparatus, comprising:
a data transmitting unit configured to transmit a plurality of data streams, each data stream of the plurality of data streams being mapped onto any one of a plurality of PLPs (physical layer pipes), the plurality of PLPs including at least a first PLP and a second PLP; and a signaling data transmitting unit configured to transmit signaling data including a PLP_PAYLOAD_TYPE indicator for each PLP of the plurality of PLPs, the PLP_PAYLOAD_TYPE indicator being a five-bit long parameter indicating a format and a compression type of a data stream carried by the PLP indicated by the PLP_PAYLOAD_TYPE indicator, wherein the PLP_PAYLOAD_TYPE indicator for the first PLP has a value indicating (i) the format of the data stream and (ii) that the compression type of the data stream is without header compression, the first PLP carries a plurality of packets of a transport stream each having a header including a packet identifier (PID), the PLP_PAYLOAD_TYPE indicator for the second PLP has a value indicating (i) the format of the data stream and (ii) that the compression type of the data stream is with header compression, the second PLP carries a plurality of packets of a header compressed transport stream each having a header with the packet identifier (PID) removed, and the removed PIDs of the plurality of packets of the header compressed transport stream of the data stream assigned to the second PLP have a same value, and the values of the removed PIDs are signaled in an area different from the header compressed transport stream.