On-board vehicle recorder system monitor

An on-board recording system for a vehicle, wherein the on-board recording system is configured to monitor data for errors, the on-board recording system comprising:

• one or more processors;
• and
• a memory coupled to the one or more processors, the memory storing data comprising a database and program code that, when executed by the one or more processors, causes the on-board recording system to:
• receive as input a data sequence including a plurality of frames that are each received and recorded by the on-board recording system at a corresponding assigned time offset and include a corresponding assigned message, wherein the plurality of frames each include one or more message identifiers associated with the corresponding assigned message, and wherein a unique message identifier is assigned to a unique time offset;
• determine a missing assigned message that has not been received at the corresponding assigned time offset;
• in response to determining the missing assigned message, calculate a total length of time based on a number of missing assigned messages that are stored in the memory;
• compare the total length of time with a threshold length of time;
• determine the total length of time is greater than the threshold length of time;
• in response to determining the total length of time is greater than the threshold length of time, determine an error has occurred;
• compare a timestamp for the unique message identifier for each of the plurality of frames with the unique time offset that has been assigned;
• determine the timestamp of the unique message identifier indicates the corresponding assigned message was sent at a time that is different from the unique time offset;
• and
• in response to determining the corresponding assigned message was sent at a time that is different from the unique time offset, determine the error has occurred.

A method for detecting errors in an on-board recording system in a vehicle, the method comprising:

• receiving, by a computer of the on-board recording system, a data sequence including a plurality of frames that are received and recorded by the on-board recording system at a corresponding assigned time offset and include a corresponding assigned message;
• determining, by the computer, a missing assigned message that has not been received at the corresponding assigned time offset;
• in response to determining the missing assigned message, calculate a total length of time based on a number of missing assigned messages stored in a memory;
• comparing the total length of time with a threshold length of time;
• determining the total length of time is greater than the threshold length of time;
• in response to determining the total length of time is greater than the threshold length of time, determining an error has occurred;
• receiving a first frame having a first assigned message with a first timestamp, wherein the first frame is part of the data sequence;
• receiving a second frame having a second assigned message with a second timestamp, wherein the second frame is received after the first frame;
• comparing the first timestamp of the first assigned message to the second timestamp of the second assigned message;
• and
• determining the first timestamp is identical to the second timestamp.