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The algorithm takes the hard disk recorder hard disk capacity calculation, many engineering and sales staff are not very clear, I do monitor the industry more than 4 years,tory burch handbag 5007 美用一揽子支援换以色列停建, and has been doing technical support, received such as Video 5 days require much hard drive Etc. This problem has N times, and today my experience in this line for your small calculated using the formula,tory burch outlets, the inadequacies also Please advice.
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 ,supra skytop tuf 聪 明 女 人 守 则, figures, background) were isolated for intra,christian louboutin pronunciation, inter-frame coding, and allow flexibility in the allocation between the different objects rate of more important objects of bytes allocated on the secondary distribution of smaller objects bytes,womens supra skytop 房主来电，告诉昨晚“麻醉抢劫”, thus greatly improving the compression ratio at a lower bit rate to obtain better results. MPEG-4 transmission rate of 4.8 ~ 64kbit / s, use relatively small storage space to 352X288 video, each hour is generally around 120M.

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,tory burch for cheap, a district with a wavelet compression algorithm card to do monitoring,ferragamo continental wallet, host 12 Road, requested 24 hours of video for 15 days, require much hard drive capacity?
to us according to the formula H = 24,white supra shoes,
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.