which compression is best mpeg1 or mpeg 4 for remote viewing

[dvrsnoop 0]

just wanting to know which compression is best for remote viewing... mpeg1 or mpeg 4 ?? please help me... im so lost..

[cctv_down_under 0]

It depends on what you are after, most use Mpeg4 because of the small size of files that are transmitted. Mpeg2 would be ideal but its just too much data to send.

[dvrsnoop 0]

thanks for that... i was looking at a system that was using mpeg1.. ill start looking at mpeg4's more closely

[IPSecurityPro 0]

MJPEG is the most common for NVRs (Network Video Recorders) in the security arena. MPEG-4 is powerful and is preferred, but there is not a lot of support (from a software standpoint) out there yet. Most DVRs are using MPEG-4 or some hybrid proprietary codec.

[XXX 0]

What about H.264?

[IPSecurityPro 0]

XXX - H.264 and MPEG-4 are the same. See the chart and text in the following link:

 

http://www.envivio.com/products/h264.html

 

H.263 is different from MPEG-4.

[cctvnew 0]

There is a lot of difference between Meg-2 and Mpeg-4. The web site exagerated the difference between Meg-4 and H.264. Other than the slight advantage provided by H.264, it uses a lot more CPU time.

[IPSecurityPro 0]

...the differences between MPEG-2 and MPEG-4 are huge.

[rory 0]

what about the differences between those and Wavelet? Except for Wavelet being larger files.

[IPSecurityPro 0]

...articles that are great resources.

 

This first one is from Charlie Pierce's website and, as you all should know, he is one of the MOST RESPECTED in the Security Industry for CCTV. He is extremely knowledgeable and his website is a plethora of information. His response to a question along these same lines brings up the most valid point - which format will be around in the years to come. Not a lot of companies are dedicating time to wavelet or using it. Most are using MJPEG or MPEG-4 - most even skipped over MPEG-2. Anyway here is his answer:

 

http://www.ltctrainingcntr.com/Technical%20Library/Squeezing%20Video%20is%20Compressioin.htm

 

This second and third links are is just a definition of wavelet:

 

http://www.barrt.ru/parshukov/about.htm

 

http://electron.mit.edu/~gsteele/wavelets/

 

I don't see a lot of people using wavelet and don't see it hanging around - long term.

[shropna 0]

Wavelet like Jpeg. Good real time speed in local LAN, but unusible in slow network.

[rory 0]

...articles that are great resources.

 

This first one is from Charlie Pierce's website and, as you all should know, he is one of the MOST RESPECTED in the Security Industry for CCTV. He is extremely knowledgeable and his website is a plethora of information. His response to a question along these same lines brings up the most valid point - which format will be around in the years to come. Not a lot of companies are dedicating time to wavelet or using it. Most are using MJPEG or MPEG-4 - most even skipped over MPEG-2. Anyway here is his answer:

 

http://www.ltctrainingcntr.com/Technical%20Library/Squeezing%20Video%20is%20Compressioin.htm

 

This second and third links are is just a definition of wavelet:

 

http://www.barrt.ru/parshukov/about.htm

 

http://electron.mit.edu/~gsteele/wavelets/

 

I don't see a lot of people using wavelet and don't see it hanging around - long term.

 

not alot using it, but GE Interlogix is, and so are some other big names, which are bigger sellers than most of the others, though in their latest 1 channel DVR they have switched to MPEG4, so perhaps they are moving over to that now.

[rory 0]

Wavelet like Jpeg. Good real time speed in local LAN, but unusible in slow network.

 

Yeah I 2nd that, you need over 256 kps to get a decent speed, ours is 384 kps and up here anywayz. 128kps is just too slow for it, which is what DSL is over here as its not ADSL.

 

Rory

[McJannet 0]

It should be investigated first what the system is to be used for. If surviellance images are required for identification and possisble use as legal evidence then you lean towards wavelet / jpg because these are a series of fully formed images (with watermarking most likely).

 

The evidenciary utility of mpegs are not good because of the use of intermediate frames that are not full images and that cannot be watermarked to the same degree as wavelets / jpegs. But these attributes make for good remote transmission speed.

 

If a security application of CCTV is based on evidence gathering then it should not use a system that isn't watermarked or one that uses intermediate image files or even one that provides fast remote transmission.

 

But the market is being driven to provide real-time viewing so that transmission may be mpeg but local storage will be wavelet; a sort of hybrid system that makes the most out of both technologies providing police with the opportunity to gather evidence and the system owner with the ability to view sites remotely in close to real time.

 

Wavelets will become obsolete when the need for lossy video compression no longer exists.

 

Regards:

 

Dave