Showing posts with label IR/Day and Night CCTV. Show all posts
Showing posts with label IR/Day and Night CCTV. Show all posts
Thursday, May 13, 2010
Tuesday, May 4, 2010
CCTV Billboard have been displayed at Seksyen 14 , PJ
CCTVMALAYSIA2u.com Billoboard have been displayed since 11.30pm, 1 May 2010 till 29 April 2011 at Jalan Utara near Bukit Bintang Boys School, Seksyen 14 ,Petaling jaya , Selangor.
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Monday, May 3, 2010
What is CCTV Camera Resolution
全马CCTV总批发商
http://www.cctvmalaysia2u.com/
What is CCTV Camera Resolution
A camera could be referred to has standard definition which basically means it is not a megapixel camera. However a camera may be called a High Resolution camera but it is still a standard definition camera.
Now an analog camera or IP camera for that matter could be 380 TV lines of resolution and it would be called a low res camera.
However, a camera with 540 TV lines would be called a high res camera. However they could both be considered standard definition cameras because they are not megapixel cameras or HDTV cameras.
In CCTV Video Security Systems the main differences of resolution are capture, storage resolution and display.
Capture or Camera resolutions for analog cameras
When reading a security camera specification sheet, you will see two sets of numbers rating the sensor of the camera. One lists the number of pixels (768 H X 494 V) for the sensor and the other rates the horizontal resolution (TVL) of the camera.
Effective pixels = 768 (Horizontal) X 494 (Vertical) pixels
Horizontal resolution = 540 TV lines
The difference between the two is pixel aspect ratio and picture aspect ratio. The pixel aspect ratio has to do with the actual number of pixels that sensor is able to capture. The picture aspect ratio is based on what the NTSC standard for analog signals (composite video) has been designed to process. The numbers are different but using the math behind it you can calculate how the two relate. We will avoid the math for this discussion.
Since analog standard definition security cameras do not have square pixels there are two types of picture aspect ratio. There is storage aspect ratio and display aspect ratio.
Storage Aspect Ratio
The storage aspect ratio is the digital size of the image as it is stored on digital media. For instance the highest stored resolution using composite video (which is what comes from an analog camera) is 720x480. That is the same as a standard
definition DVD movie.When storing video on an analog security DVR you have several resolution options. The typical settings available for storage are CIF, 2CIF and 4CIF.
• CIF = 352 x240 pixels
• 2CIF = 704 x 240 pixels
• 4CIF = 704 x 480 pixels
Display Aspect RatioNewer standards for TV have introduced High Definition TV with an aspect ration of 16:9 which allows for a greater number of lines of resolution to be displayed. Newer technology of cameras are now able to capture higher resolutions which will now allow for storing and displaying these higher resolutions.
Megapixel resolution IP Camerass
Just a note about megapixel IP cameras. Megapixelcameras can capture video at much higher resolutions but are not necessarily the same as High Definition as in HDTV. HDTV has a very specific set of resolutions available. 720p HDTV is 1280 x 720 and 1080p HDTV is 1920 x 1080. HDTV also operates at 30fps
A megapixel camera that is 1.3 megapixels has a resolution of 1280 x 1024. From there the megapixels go up. 2, 3, 5, and on up to 16mp. However they are not able to capture images at 30 fps. They typically are only capturing 3 to 7 fps. Megapixel cameras can display higher than HDTV resolutions on PC monitors that support higher resolutions.Take a look at the chart below to see how some of the more common resolutions compare. Other Resolutions Compared
Designation = H x V pixels
• CIF = 352x 240
• 2CIF = 704 x 240
• 4CIF = 704 x 480
• D1 = 720 x 480
• 720p HDTV = 1280 x 720
• 1.3MP = 1280 x 1024
• 2MP = 1600 x 1200
• 1080p HDTV = 1920 x 1080
• 3MP = 2048 x 1536
• 5MP = 2592 x 1944
• 11MP = 4000 x 2656
• 16MP = 4872 x 3248
http://www.cctvmalaysia2u.com/
What is CCTV Camera Resolution
A camera could be referred to has standard definition which basically means it is not a megapixel camera. However a camera may be called a High Resolution camera but it is still a standard definition camera.
Now an analog camera or IP camera for that matter could be 380 TV lines of resolution and it would be called a low res camera.
However, a camera with 540 TV lines would be called a high res camera. However they could both be considered standard definition cameras because they are not megapixel cameras or HDTV cameras.
In CCTV Video Security Systems the main differences of resolution are capture, storage resolution and display.
Capture or Camera resolutions for analog cameras
When reading a security camera specification sheet, you will see two sets of numbers rating the sensor of the camera. One lists the number of pixels (768 H X 494 V) for the sensor and the other rates the horizontal resolution (TVL) of the camera.
Effective pixels = 768 (Horizontal) X 494 (Vertical) pixels
Horizontal resolution = 540 TV lines
The difference between the two is pixel aspect ratio and picture aspect ratio. The pixel aspect ratio has to do with the actual number of pixels that sensor is able to capture. The picture aspect ratio is based on what the NTSC standard for analog signals (composite video) has been designed to process. The numbers are different but using the math behind it you can calculate how the two relate. We will avoid the math for this discussion.
Since analog standard definition security cameras do not have square pixels there are two types of picture aspect ratio. There is storage aspect ratio and display aspect ratio.
Storage Aspect Ratio
The storage aspect ratio is the digital size of the image as it is stored on digital media. For instance the highest stored resolution using composite video (which is what comes from an analog camera) is 720x480. That is the same as a standard
definition DVD movie.When storing video on an analog security DVR you have several resolution options. The typical settings available for storage are CIF, 2CIF and 4CIF.
• CIF = 352 x240 pixels
• 2CIF = 704 x 240 pixels
• 4CIF = 704 x 480 pixels
Display Aspect RatioNewer standards for TV have introduced High Definition TV with an aspect ration of 16:9 which allows for a greater number of lines of resolution to be displayed. Newer technology of cameras are now able to capture higher resolutions which will now allow for storing and displaying these higher resolutions.
Megapixel resolution IP Camerass
Just a note about megapixel IP cameras. Megapixelcameras can capture video at much higher resolutions but are not necessarily the same as High Definition as in HDTV. HDTV has a very specific set of resolutions available. 720p HDTV is 1280 x 720 and 1080p HDTV is 1920 x 1080. HDTV also operates at 30fps
A megapixel camera that is 1.3 megapixels has a resolution of 1280 x 1024. From there the megapixels go up. 2, 3, 5, and on up to 16mp. However they are not able to capture images at 30 fps. They typically are only capturing 3 to 7 fps. Megapixel cameras can display higher than HDTV resolutions on PC monitors that support higher resolutions.Take a look at the chart below to see how some of the more common resolutions compare. Other Resolutions Compared
Designation = H x V pixels
• CIF = 352x 240
• 2CIF = 704 x 240
• 4CIF = 704 x 480
• D1 = 720 x 480
• 720p HDTV = 1280 x 720
• 1.3MP = 1280 x 1024
• 2MP = 1600 x 1200
• 1080p HDTV = 1920 x 1080
• 3MP = 2048 x 1536
• 5MP = 2592 x 1944
• 11MP = 4000 x 2656
• 16MP = 4872 x 3248
Monday, April 19, 2010
How to chose a good CCTV Security Camera Surveillance System
In the past few years the need for CCTV security surveillance systems has increased, wither its for your home or your business CCTV technologies have proven to increase security. and Just like any other technology now a days, CCTV systems are way more affordable that they used to be, but first what makes a good CCTV security camera system
Instructions
Instructions
Step 1
The number of Frames Per second your DVR (Digital Video Recorder) is capable of handling. First understanding what that means, A real time second of video is 30 Frames. so a recorded second or video motion that doesn't skip is 30 Frames. So if your CCTV camera system is capable of handling 30fps that means you can record only one camera real time otherwise the 30fps will be divided into how many cameras they system might support. So when looking for a good CCTV Surveillance system make sure you get a system that does 30fps for each camera. so if you are looking for a 4 a good CCTV security camera system look for a 120fps DVR capable.
The number of Frames Per second your DVR (Digital Video Recorder) is capable of handling. First understanding what that means, A real time second of video is 30 Frames. so a recorded second or video motion that doesn't skip is 30 Frames. So if your CCTV camera system is capable of handling 30fps that means you can record only one camera real time otherwise the 30fps will be divided into how many cameras they system might support. So when looking for a good CCTV Surveillance system make sure you get a system that does 30fps for each camera. so if you are looking for a 4 a good CCTV security camera system look for a 120fps DVR capable.
Step 2
TV Lines supported by the CCTV cameras. A CCTV camera's quality is measured by TV Lines, which is the number of horizontal TV lines the camera produces, and of course the higher the clearer and better picture. the average quality is 400TVL, 420TVL is good picture quality, 480TVL is higher quality and more is even Better. keep in mind that TV Lines is what mainly controls the price of the CCTV camera.
Step3
The Resolution of which the DVR does display and record. which is the original dimensions in pixels of the displayed or recorded video Such as 160x120, 320x240 and 640x480 and the higher is the better.
Step 4
The HDD capacity of the CCTV DVR. which basically means the number of recorded previous days of video that the DVR will keep before recycling. most CCTV systems by default record video based on motion which means if there is no motion there is no recording because practically it will be a still image rather than video. the average for a 4 camera system is between 160GB and 250GB and the higher the more days of recorded video (motion) your DVR system keep.
Step 5
Remote capability. Now a days a standard CCTV camera systems are remote view capable. which means you can view your cameras remotely and virtually from anywhere in the world using the internet using internet explorer or using a remote client that is installed on the PC your accessing the DVR from.
Step 6
Back up and recovery compatibility. CCTV camera systems give you the ability to back up desired video period either on CD-R, DVD-R or USB storage including USB flash drives. Making it easy to export video to other devices for many various reasons. for example making a copy for the police or the insurance company
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