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1) MJPEG
MJPEG (Motion JPEG) image compression standard from the JPEG compression technology, is a simple frame JPEG compression, it compresses each frame of video, the compression ratio of small and large quantities, usually per Each hours 325X288 resolution video requires about 1G of hard disk space.
2) wavelet algorithm
wavelet algorithm is based on wavelet transform video compression, the technology is to make the image signal in time domain and frequency domain resolution, the resolution reached at the same time the highest. Kernel is used to compress and decompress in the way of the road, between frames in the video is not related to 352X288 video, each hour is generally around 350M.
3) ; MPEG-4
MPEG-4 compression standard is object-oriented way, not like MPEG-1 and MPEG-2 simple things like the image is divided into blocks, but according to the image content, will be one of the objects (objects ,
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4) H.264
This types of MPEG-4 compression mode and basically the same, so we can calculate the time MPEG-4 in accordance with the capacity to calculate.
capacity formula G = H * N * T * X/1024
where G is the last calculated on behalf of the hard disk capacity
H several hours a day video video
T representatives to the number of days
X 4 on behalf of the above compression mode
example,
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to us according to the formula H = 24,
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N = 12
X = 350M
; T = 15
finally get G = 24 * 12 * 350 * 15/1024 = 1476.5G
this is Finally, the size of hard drive capacity.