Patent ID: 9025674
Filing Date: 2015-05-05
Classification: H04L,H04N

Abstract:
1. An apparatus implemented at a receiving end of a video broadcasting system and for reconstructing a transport stream, among a plurality of transport streams being sent from a transmitting end of the video broadcasting system, from a first data stream and a second data stream, each of which comprising a plurality of packets, a plurality of input stream time reference (ISCR) values to represent reference time points of the packets in numbers of clocks, and a plurality of null packet (DNP) values to represents numbers of null packets between consecutive packets, the apparatus comprising: a packet interval detector that detects a packet interval according to the first data stream and the second data stream, the packet interval detector configured to: determine a clock difference in the ISCR values of two consecutive received packets; determine a number of packets between the received packets from a DNP value associated with the received packets; and detect the packet interval as a number of clocks between the two received packets based on the determined ISCR difference and DNP value: an alignment unit, that generates aligns the first data stream and the second data stream using an alignment signal according to the ISCR values and the packet interval; an oscillator, coupled to the packet interval detector, that generates an output pulse signal; and a reconstruction controller, that reconstructs the transport stream from the first data stream and the second data stream according to the alignment signal and the output pulse signal, and outputs the transport stream, wherein one of the first and the second data streams contains common data commonly contained in the transport streams from the transmitting end, and one of the first and the second data streams contains data only contained in the transport stream to be reconstructed.