D-Link DCS-1100 - mydlink-enabled Wired Network Camera Uživatelský manuál stáhnout pdf (Strana 33)

129129

Contents

 Bandwidth Needs

 Calculating Storage Needs

130

Bandwidth Needs

 IP Surveillance system with less than 10 IP cameras can be implemented in

100 Mbps network without having to consider bandwidth limitation.

 Implementing more than 10 IP cameras using gigabit backbone connection

will provide better performance and prevent the IP surveillance system from

overwhelming the network. This is because high quality image with high

frame rate used by the IP Camera can use up to more than 2 to 3 Mbps of

network bandwidth.

Appendix – Bandwidth & Storage Considerations

• Bandwidth Needs

131

Calculating Storage Needs

 H.264 and MPEG-4 calculation

• Mega bit per hour = approx. bit rate x 3600s

Resolution Image size (Kb) Frames per

second

Mega bit per

hour

Mega Byte per

hour

CIF 104 15 5616 702

4CIF 320 15 17280 2160

Compression

Type

Resolution Approx. bit rate

(Kbps)

Mega bit per

hour

Mega Byte per

hour

H.264 CIF 110 396 49.5

4CIF 600 2160 270

MPEG-4 CIF 170 612 76.5

4CIF 880 3168 396

Appendix – Bandwidth & Storage Considerations

• Calculating Storage Needs

 M-JPEG calculation

• Mega bit per hour = image size x frame per second x 3600s

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