Patent ID: 8750389

Claim:
A decoder of video data and subtitle data associated with said video data, said data coming from a flow of data including PCR time references in synchronism with a clock used to synchronize the coding of said data, said decoder comprising: a storage space, said video data and subtitle data being recorded in multiplexed form on said storage space; a first buffer memory operating in “First In First Out” mode and able to temporarily contain said video data in packet form; a second buffer memory operating in “First In First Out” mode and able to temporarily contain said subtitle data in packet form; a demultiplexer configured to transmit said video data and said subtitle data respectively to said first and said second buffer memory; and a local clock, wherein said storage space comprises means to store said PCR time references such that said demultiplexer transmits said PCR time references, said decoder including means to generate a presentation time stamp associated with each subtitle data packet not initially containing a presentation time stamp, said presentation time stamp being determined from a time reference value of a PCR time reference among said PCR time references and transmitted by said demultiplexer and enabling the presentation of said subtitle data packets to be synchronized with relation to said local clock, wherein the decoder comprises means for storing a time reference variable equal to the last time reference received from said multiplexer, said means to generate a presentation time stamp setting the value of said presentation time stamp of each subtitle data packet received in said second buffer memory at the current value of said time reference variable.