Under the same resolution conditions, a higher video bitrate results in increased image clarity with reduced compression.
- Upstream Bandwidth: This term refers to the bandwidth for data sent from the local site to the network, typically measured in upload speed.
- Downstream Bandwidth: On the other hand, it relates to the bandwidth for data received from the network, usually measured as download speed.
Transmission Bandwidth Calculation:
1. Network Bandwidth Size = Bitrate Size × Number of Cameras
Please note: Some professional resources use "bitrate" while others refer to it as "data rate." Both terms are interchangeable, but in this context, "bitrate" signifies network speed, while "data rate" implies the size of video generated per second.
- Camera-Side Bandwidth for Monitoring: This refers to the upstream bandwidth because it involves uploading video information from the monitoring location to the central monitoring room.
- Bandwidth for the Central Monitoring Hub: This pertains to downstream bandwidth.
2. Specific Bitrate for Monitoring Cameras (May slightly vary depending on camera brand)
For 1080P (2-megapixel) video format, the bitrate per camera is 4 Mbps. Consequently, each camera requires a data transmission bandwidth of 4 Mbps. For ten cameras, the total required data transmission bandwidth would be 4 Mbps (video format bitrate) × 10 (number of cameras) = 40 Mbps (upstream bandwidth).
So, if you are using 1080P video format, each monitoring location would necessitate an upstream bandwidth of at least 40 Mbps. For 960P (1.3-megapixel) video format, the bitrate per camera is 3 Mbps, and for 720P (1-megapixel) video format, the bitrate per camera is 2 Mbps.
3. Required Bandwidth for the Central Monitoring Hub:
For 1080P (2-megapixel) video format, the necessary bandwidth can be calculated as 4 Mbps (video format bitrate) × 50 (total number of cameras at monitoring points) = 200 Mbps (downstream bandwidth). In essence, if you opt for 1080P video format, the central monitoring hub would need a downstream network bandwidth of at least 200 Mbps.
For 960P (1.3-megapixel) video format, the required bandwidth is calculated as 3 Mbps (video format bitrate) × 50 (total number of cameras at monitoring points) = 150 Mbps (downstream bandwidth).
For 720P (1-megapixel) video format, the required bandwidth is calculated as 2 Mbps (video format bitrate) × 50 (total number of cameras at monitoring points) = 100 Mbps (downstream bandwidth).
Storage Space Capacity Calculation:
Note: To convert storage units, 1TB = 1024GB; 1GB = 1024MB; 1MB = 1024KB.
The formula for determining the required storage space size is as follows:
Bitrate Size (in KB/s; equivalent to bitrate ÷ 8) × 3600 (in seconds; representing the number of seconds in an hour) × 24 (in hours; indicating the duration of a day) × 30 (the number of days for data retention) × 50 (the total number of recorded camera videos at monitoring points) ÷ 0.9 (to account for a 10% loss due to disk formatting) = The necessary size of storage space.
- Upstream Bandwidth: This term refers to the bandwidth for data sent from the local site to the network, typically measured in upload speed.
- Downstream Bandwidth: On the other hand, it relates to the bandwidth for data received from the network, usually measured as download speed.
Transmission Bandwidth Calculation:
1. Network Bandwidth Size = Bitrate Size × Number of Cameras
Please note: Some professional resources use "bitrate" while others refer to it as "data rate." Both terms are interchangeable, but in this context, "bitrate" signifies network speed, while "data rate" implies the size of video generated per second.
- Camera-Side Bandwidth for Monitoring: This refers to the upstream bandwidth because it involves uploading video information from the monitoring location to the central monitoring room.
- Bandwidth for the Central Monitoring Hub: This pertains to downstream bandwidth.
2. Specific Bitrate for Monitoring Cameras (May slightly vary depending on camera brand)
For 1080P (2-megapixel) video format, the bitrate per camera is 4 Mbps. Consequently, each camera requires a data transmission bandwidth of 4 Mbps. For ten cameras, the total required data transmission bandwidth would be 4 Mbps (video format bitrate) × 10 (number of cameras) = 40 Mbps (upstream bandwidth).
So, if you are using 1080P video format, each monitoring location would necessitate an upstream bandwidth of at least 40 Mbps. For 960P (1.3-megapixel) video format, the bitrate per camera is 3 Mbps, and for 720P (1-megapixel) video format, the bitrate per camera is 2 Mbps.
3. Required Bandwidth for the Central Monitoring Hub:
For 1080P (2-megapixel) video format, the necessary bandwidth can be calculated as 4 Mbps (video format bitrate) × 50 (total number of cameras at monitoring points) = 200 Mbps (downstream bandwidth). In essence, if you opt for 1080P video format, the central monitoring hub would need a downstream network bandwidth of at least 200 Mbps.
For 960P (1.3-megapixel) video format, the required bandwidth is calculated as 3 Mbps (video format bitrate) × 50 (total number of cameras at monitoring points) = 150 Mbps (downstream bandwidth).
For 720P (1-megapixel) video format, the required bandwidth is calculated as 2 Mbps (video format bitrate) × 50 (total number of cameras at monitoring points) = 100 Mbps (downstream bandwidth).
Storage Space Capacity Calculation:
Note: To convert storage units, 1TB = 1024GB; 1GB = 1024MB; 1MB = 1024KB.
The formula for determining the required storage space size is as follows:
Bitrate Size (in KB/s; equivalent to bitrate ÷ 8) × 3600 (in seconds; representing the number of seconds in an hour) × 24 (in hours; indicating the duration of a day) × 30 (the number of days for data retention) × 50 (the total number of recorded camera videos at monitoring points) ÷ 0.9 (to account for a 10% loss due to disk formatting) = The necessary size of storage space.
