SYSTEM AND METHOD FOR VIDEO RECORDING AND RETENTION IN A NETWORK

• US 20130307971A1
• Filed: 05/16/2012
• Published: 11/21/2013
• Est. Priority Date: 05/16/2012
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Ganesan, Elango, Freed, Michael, Apgar, Brian A., Jouret, Guido
• Granted Patent: US 9,049,349 B2
• Time in Patent Office: Days
• US Class Current: 348/143
• CPC Class Codes: H04N 21/2143 located in a single building, e.g. hotel, hospital or museum arrangements specially adapted for plural spots in a confined site in broadcast systems H04H20/63; adaptations for transmission by electric cable for domestic distribution in television systems H04N7/106
• CPC Class Codes: H04N 21/21805 enabling multiple viewpoints, e.g. using a plurality of cameras
• CPC Class Codes: H04N 7/181 for receiving images from a plurality of remote sources

Abstract

A method is provided in one example embodiment and includes receiving a video frame from an encoder associated with a first camera that is coupled to a network; appending the video frame to a data block; associating a parity block to the video frame; evaluating whether the data block is full; and communicating the data block to a second camera in the network. In other embodiments, the method can include receiving additional video frames from the encoder; appending the additional video frames to a plurality of data blocks; and aligning particular sizes of the plurality of data blocks to a plurality of corresponding disk write sizes.

Claims

1. A method, comprising:

receiving a video frame from an encoder associated with a first camera that is coupled to a network;

appending the video frame to a data block;

associating a parity block to the video frame;

evaluating whether the data block is full; and

communicating the data block to a second camera in the network.

2. The method of claim 1, further comprising:

receiving additional video frames from the encoder;

appending the additional video frames to a plurality of data blocks; and

aligning particular sizes of the plurality of data blocks to a plurality of corresponding disk write sizes.

3. The method of claim 1, further comprising:

determining whether the parity block is full; and

writing the parity block to persistent storage.

4. The method of claim 1, wherein if the data block is full, then the data block is marked as dirty using metadata.

5. The method of claim 1, further comprising:

providing metadata for a plurality of data blocks; and

storing the plurality of data blocks based on the metadata.

6. The method of claim 1, wherein associating the parity block to the video frame includes performing an XOR operation with the data block and the video frame.

7. The method of claim 1, wherein the data block includes one or more groups of pictures (GOPs) that begin with an I-frame.

8. The method of claim 1, wherein a local data block copy remains in a dirty state until an explicit disk write transaction acknowledgment is received from a different camera coupled to the network.

9. The method of claim 1, wherein primary and secondary video streams for a given time range are stored in a same location in the network.

10. The method of claim 1, wherein chunks of video data that overlap with an event window are marked, check-summed, and retained in a database.

11. The method of claim 1, further comprising:

receiving a request for particular video content;

accessing a manifest database to identify a location associated with the video content; and

retrieving at least a portion of the video content from the location.

12. The method of claim 1, further comprising:

coordinating communications associated with an event delivery for the first camera in order to manage at least one recording and retention policy for the first camera.

13. Logic encoded in one or more non-transitory media that includes code for execution and when executed by one or more processors is operable to perform operations comprising:

receiving a video frame from an encoder associated with a first camera that is coupled to a network;

appending the video frame to a data block;

associating a parity block to the video frame;

evaluating whether the data block is full; and

communicating the data block to a second camera in the network.

14. The logic of claim 13, the operations further comprising:

receiving additional video frames from the encoder;

appending the additional video frames to a plurality of data blocks; and

aligning particular sizes of the plurality of data blocks to a plurality of corresponding disk write sizes.

15. The logic of claim 13, the operations further comprising:

determining whether the parity block is full; and

writing the parity block to persistent storage.

16. The logic of claim 13, the operations further comprising:

providing metadata for a plurality of data blocks; and

storing the plurality of data blocks based on the metadata.

17. The logic of claim 13, the operations further comprising:

receiving a request for particular video content;

accessing a manifest database to identify a location associated with the video content; and

retrieving at least a portion of the video content from the location.

18. The logic of claim 13, the operations further comprising:

coordinating communications associated with an event delivery for the first camera in order to manage at least one recording and retention policy for the first camera.

19. An apparatus, comprising:

a processor;

a redundant array of cameras (RAC) module; and

a memory coupled to the processor, wherein the processor is configured to execute instructions such that the apparatus is configured for;

receiving a video frame from an encoder;

appending the video frame to a data block;

associating a parity block to the video frame;

evaluating whether the data block is full; and

communicating the data block to a camera in the network.

20. The apparatus of claim 19, further comprising:

a manifest database coupled to the apparatus and configured for storing a plurality of data blocks based on metadata.