After the camera has capture the image, it has to be transmitted to remote clients. This process is image transmission. IP is a kind of network transmission protocol. Therefore in IP surveillance system the image transmission is done via a network. Basically, the network is like a transportation system in a city.
The following examples will help to simplify it:
1. House, building = a network devices
2. House address on the road = the IP address of a network device
3. Different goods to be transported = different network data (ex. video)
4. Different transport devices(ex. Truck, car) = different network connections (ex. wired or wireless).
IP address
IP address is the virtual address of a network device in the network. Each device has its unique address. IP address contains 4 groups of 3 digits separated by a dot. Each group of digits is in the range 0-255. Example: 172.162.64.28. For each device within the same network segment, they will share the same first 3 group of digits. Example: Any camera within the same network segment as 172.162.64.28 will be 172.162.64.xx like:
a. 172.162.64.23
b. 172.162.64.253
Wired
The network device is connected to the network via direct network cabling. This network is of different types.
The Ethernet transmission type, with the transmission speed of 10 Mbps is now replaced by 100 Mbps Fast Ethernet type. This transmission type is exactly the same as 10Mbps. Ethernet except for its 100 Mbps transmission speed (10X times more). This is commonly what we use daily in our offices. Gigabit Ethernet is the next transmission type after the Fast Ethernet. The transmission speed on it is 1,000 Mbps. Because of its high transmission speed, it is commonly used as network backbone in the IP surveillance system. (In other words, it is used to be a high way between two cities).
Wireless
Although most current buildings are with network cable pre-built, there are still many places where a. network cable can't reach b. it's very expensive to lay network cable
In these cases, we will need wireless connection. There are two types of wireless connections, one is for analog and the other is for digital. Analog wireless has a lot of problems because it is easily effected by the environmental factors. Digital wireless provides outstanding performance compared to that.
The following examples will help to simplify it:
1. House, building = a network devices
2. House address on the road = the IP address of a network device
3. Different goods to be transported = different network data (ex. video)
4. Different transport devices(ex. Truck, car) = different network connections (ex. wired or wireless).
IP address
IP address is the virtual address of a network device in the network. Each device has its unique address. IP address contains 4 groups of 3 digits separated by a dot. Each group of digits is in the range 0-255. Example: 172.162.64.28. For each device within the same network segment, they will share the same first 3 group of digits. Example: Any camera within the same network segment as 172.162.64.28 will be 172.162.64.xx like:
a. 172.162.64.23
b. 172.162.64.253
Wired
The network device is connected to the network via direct network cabling. This network is of different types.
The Ethernet transmission type, with the transmission speed of 10 Mbps is now replaced by 100 Mbps Fast Ethernet type. This transmission type is exactly the same as 10Mbps. Ethernet except for its 100 Mbps transmission speed (10X times more). This is commonly what we use daily in our offices. Gigabit Ethernet is the next transmission type after the Fast Ethernet. The transmission speed on it is 1,000 Mbps. Because of its high transmission speed, it is commonly used as network backbone in the IP surveillance system. (In other words, it is used to be a high way between two cities).
Wireless
Although most current buildings are with network cable pre-built, there are still many places where a. network cable can't reach b. it's very expensive to lay network cable
In these cases, we will need wireless connection. There are two types of wireless connections, one is for analog and the other is for digital. Analog wireless has a lot of problems because it is easily effected by the environmental factors. Digital wireless provides outstanding performance compared to that.
SHARE
