Method and system for performing data integrity verification of a transport stream
A method, system, and computer-readable medium for facilitating integrity verification of a transport stream is provided. Integrity verification is performed without increasing the bit rate of the transport stream by generating a checksum corresponding to a portion of the transport stream and inserting the checksum into a null packet within the transport stream. Utilizing a null packet to carry the checksum allows the checksum to be transmitted without increasing the bit rate of the transport stream. In addition, by creating a checksum corresponding to a portion of the transport stream, integrity verification may be performed on a streaming data file.
1. A non-transitory computer-implemented method of inserting a checksum into a transport stream including a plurality of null packets and a plurality of non-null packets, the method comprising:
grouping the plurality of non-null packets within the transport stream into a datagram;
generating a checksum corresponding to the datagram; and
inserting the checksum into one of the plurality of null packets, thereby creating a modified transport stream.
2. The method of claim 1 , wherein the modified transport stream comprises a first null packet and a second null packet separated by the datagram.
3. The method of claim 2 , wherein inserting the checksum into one of the plurality of null packets comprises inserting the checksum into the second null packet.
4. A non-transitory computer-implemented method for identifying an error within a datagram, comprising:
receiving a transport stream comprising:
a datagram comprising one or more non-null packets, and
a checksum corresponding to the datagram;
utilizing the checksum to determine that the datagram contains the error; and
replacing the one or more non-null packets of the datagram with one or more null packets.
5. The method of claim 4 , wherein the transport stream comprises a first null packet and a second null packet separated by the datagram.
6. A non-transitory computer-readable medium having computer executable software code stored thereon for inserting a checksum into a transport stream including a plurality of null packets and a plurality of non-null packets, the computer-readable medium comprising:
code for grouping the plurality of non-null packets within the transport stream into a datagram executed on the computer;
code for generating a checksum corresponding to the datagram; and
code for inserting the checksum into one of the plurality of null packets, thereby creating a modified transport stream.
7. The computer-readable medium of claim 6 , wherein the modified transport stream comprises a first null packet and a second null packet separated by the datagram.
8. The computer-readable medium of claim 7 , wherein the code to insert the checksum into one of the plurality of null packets comprises inserting the checksum into the second null packet.
9. A non-transitory computer-readable medium having stored thereon computer executable software code for identifying an error within a datagram, the computer-readable medium comprising:
code for receiving a transport stream executed on a computer comprising:
a datagram comprising one or more non-null packets, and
a checksum corresponding to the datagram;
code for utilizing the checksum to determine that the datagram contains the error; and
code for replacing the one or more non-null packets of the datagram with one or more null packets.
10. The computer-readable medium of claim 9 , wherein the transport stream comprises a first null packet and a second null packet separated by the datagram.
11. A system for inserting a checksum into a transport stream including a plurality of null packets and a plurality of non-null packets, comprising a non-transitory computer readable medium storing executable instructions thereon operable to execute, on a processor:
a datagram creation module, executed on a computer, configured to group the plurality of non-null packets within the transport stream into a datagram;
a checksum generation module configured to generate a checksum corresponding to the datagram; and
a checksum insertion module configured to insert the checksum into one of the plurality of null packets, thereby creating a modified transport stream.
12. The system of claim 11 , wherein the modified transport stream comprises a first null packet and a second null packet separated by the datagram.
13. The system of claim 12 , wherein the checksum insertion module inserts the checksum into the second null packet.
14. A system for identifying an error within a datagram, comprising a non-transitory computer readable medium storing executable instructions thereon operable to execute, on a processor:
a receiving module configured to receive a transport stream, using a computer, comprising;
a datagram comprising one or more non-null packets, and
a checksum corresponding to the datagram;
a checksum utilization module configured to utilize the checksum to determine that the datagram contains the error; and
an error nullification module configured to replace the one or more non-null packets of the datagram with one or more null packets.
15. The system of claim 14 , wherein the receiving module is configured to receive the transport stream comprising a first null packet and a second null packet separated by the datagram.