Patent ID: 8942539
Filing Date: 2015-01-27
Classification: G11B,H04N

Abstract:
1. Apparatus for recording a real time sequence of information signal packets (TS packet) comprising A/V information, on a record carrier, the sequence comprising at intervals of multiple information signal packets, Program Clock Reference (PCR) information for locking a local System Time Counter (STC) to a clock at a transmitting site, the apparatus comprising: receiving means for receiving the information signal packets, a local System Time Counter (STC) for generating counts, time stamp generating means for generating a time stamp corresponding to an arrival time of the information signal packets, writing means for recording the generated time stamps and information signal packets on the record carrier, the time stamp generating means comprising an Application Packet Arrival Time Stamp (APAT) counter for generating an Application Packet Arrival Time Stamp (APAT) when a packet is received based on the local System Time Counter (STC), the Application Packet Arrival Counter (APAT) being set with the Application Packet Arrival Time (APAT) time stamp from a first information signal packet; wherein the time stamp generating means determines a number of counts of the local System Time Counter (STC) between said Application Packet Arrival Time Stamp (APAT) and the Application Packet Arrival Time Stamp (APAT) of the first information signal packet that comprises Program Clock Reference (PCR) information; the time stamp generating means subtracts said number of counts from the a Program Clock Reference (PCR) value of the Program Clock Reference (PCR) Information to retrieve a System Time Counter start value (STC-start); the writing means records on the record carrier the sequence of information signal packets with the appended Application Packet Arrival Time Stamps (APAT) and the System Time Counter start value (STC-start) as an attribute of the sequence.