SHORT-TERM AND LONG-TERM MEMORY ON AN EDGE DEVICE
Systems and methods are provided for distributed video storage and search over edge computing devices having a short-term memory and a long-term memory. The method may comprise caching a first portion of data on a first device. The method may further comprise determining, at a second device, whether the first device has the first portion of data. The determining may be based on whether the first piece of data satisfies a specified criterion. The method may further comprise sending the data, or a portion of the data, and/or a representation of the data from the first device to a third device.
1 . A data storage device comprising: a memory; and
a controller configured to:
receive first video data;
store the first video data in the memory at a first quality level;
after expiration of a first time period:
read the first video data from the memory;
re-encode the first video data at a second quality level, wherein the second quality level is lower than the first quality level; and
store the first video data re-encoded at the second quality level in the memory;
receive second video data;
store the second video data in the memory at the first quality level; and
after expiration of a second time period:
read the first video data from the memory;
re-encode the first video data at a third quality level, wherein the third quality level is lower than the second quality level;
store the first video data re-encoded at the third quality level in the memory;
read the second video data from the memory;
re-encode the second video data at the second quality level; and
store the second video data re-encoded at the second quality level in the memory.
2 . The data storage device of claim 1 , wherein the second quality level is lower than the first quality level in terms of resolution.
3 . The data storage device of claim 1 , wherein the second quality level is lower than the first quality level in terms of bit rate.
4 . The data storage device of claim 1 , wherein the second quality level is lower than the first quality level in terms of number of video frames.
5 . The data storage device of claim 1 , wherein a portion of the memory is allocated for storage of video data.
6 . The data storage device of claim 1 , wherein the controller comprises an audio/video encoder/decoder configured to re-encode the first video data.
7 . The data storage device of claim 1 , wherein the first video data comprises surveillance video.
8 . A method comprising:
performing the following in a data storage device comprising a memory:
receiving a first video file:
storing the first video file in the memory at a first quality level:
after expiration of a first time period:
reading the first video file from the memory:
re-encoding the first video file at a second quality level, wherein the second quality level is lower than the first quality level: and
storing the first video file re-encoded at the second quality level in the memory:
receiving a second video file:
storing the second video file in the memory at the first quality level: and after expiration of a second time period:
reading the first video file from the memory:
re-encoding the first video file at a third quality level, wherein the third quality level is lower than the second quality level:
storing the first video file re-encoded at the third quality level in the memory:
reading the second video file from the memory:
re-encoding the second video file at the second quality level: and
storing the second video file re-encoded at the second quality level in the memory
for each video file of a plurality of video files stored in the memory.
9 . The method of claim 8 , wherein the second quality level is lower than the first quality level in terms of resolution.
10 . The method of claim 8 , wherein the second quality level is lower than the first quality level in terms of bit rate.
11 . The method of claim 8 , wherein the second quality level is lower than the first quality level in terms of number of video frames.
12 . The method of claim 8 , wherein the first video file comprises a surveillance video.
13 . The method of claim 8 , wherein a portion of the memory is allocated for storage of video files.
14 . The method of claim 8 , wherein the first video file is re-encoded using an audio/video encoder/decoder in the data storage device.
15 . A data storage device comprising:
a memory;
means for receiving a first video file;
means for storing the first video file in the memory at a first quality level;
means for performing after expiration of a first time period:
reading the first video file from the memory;
re-encoding the first video file at a second quality level, wherein the second quality level is lower than the first quality level; and
storing the first video file re-encoded at the second quality level in the memory;
means for receiving a second video file;
means for storing the second video file in the memory at the first quality level; and
means for performing after expiration of a second time period:
reading the first video file from the memory;
re-encoding the first video file at a third quality level, wherein the third quality level is lower than the second quality level;
storing the first video file re-encoded at the third quality level in the memory;
reading the second video file from the memory;
re-encoding the second video file at the second quality level; and
storing the second video file re-encoded at the second quality level in the memory.