D-Link DCS-1100 - mydlink-enabled Wired Network Camera Uživatelský manuál Strana 25
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H.264
H.264, also known as MPEG-4 part 10/AVC, is the latest MPEG video compression
standard. Without affecting image quality, H.264 can reduce the size of a digital video
file by more than 80% as compared with motion JPEG format, and by more than 50%
as compared with MPEG-4 standard.
H.264 delivers excellent video quality across an entire bandwidth spectrum from 3G
to HD and everything in between (from 40 Kbps to upwards of 10 Mbps).
The improved compression performance of H.264 comes at the price of greater
computational cost. H.264 is more sophisticated than earlier compression methods.
The highly efficient compression technology of H.264 is expected to support the
adaptation of higher performance network cameras such as megapixel camera.
IP Surveillance Essential
• Compression
MPEG-2 MPEG-4 H.264
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Compression Format Comparison
IP Surveillance Essential
• Compression
Video Compression Type
MJPEG MPEG-4 H.264
Low bit rate streams No Yes Yes
Stream size @ 30fps D1 1800KBps 60KBps 60KBps
Stream size @ 2fps D1 60KBps 50KBps 50KBps
Compression quality Standard Good Excellent
Computational
requirement
Low Medium High
Applications Security
surveillance
DVD, Digital TV,
Satellite TV, Personal
video recorders, mobile
streaming, internet
streaming, camcorders
Security surveillance,
video phone, video
conferencing, digital
TV, satellite TV, mobile
streaming
99
Frame Rate
Frame rate is the measurement of number of frames or images that an
imaging device produces in one second.
Video with higher frame rate has a higher quality image and smoother
object movement, but has a larger file size.
NTSC frame rate is 60 interlaced field per second or approximately 29.87
frame per second. (2 fields will combine into 1 frame)
PAL frame rate is 50 interlaced field per second or 25 frame per second. (2
fields will combine into 1 frame).
IP Surveillance Essential
• Compression
100
Audio Support
In traditional analog surveillance system, implementation of audio support
needs two separate cables for audio and video data.
IP surveillance supports audio implementation in the system. IP camera
with audio support can process and send both audio and video data over
the same IP network infrastructure for monitoring, recording or any other
audio/video processing.
IP Surveillance Essential
• Audio
Audio Stream
Video Stream
Analog Surveillance System
Audio Stream
Video Stream
IP Surveillance System
DVR
Monitor
Analog Camera
IP Camera
Management Server
IP Network
- Why D-Link IP Surveillance 1
- • IP Surveillance Evolution 2
- For Various Markets 3
- For Various Environments 3
- For Various Light Conditions 3
- For High Resolution 4
- D-Link IP Surveillance 5
- Products Overview 5
- Consumer Cameras 6
- Prosumer PTZ Desktop Series 6
- Professional Fixed Box Series 6
- Network Video Recorder (NVR) 8
- Video Server 8
- Accessories 8
- Major Features of IP 9
- Surveillance Solution 9
- Contents 10
- Power over Ethernet (PoE) 10
- WPS (Wi-Fi Protected Setup) 10
- Dual Stream / Multi-Profile 11
- Front End Storage 11
- Megapixel Sensor 11
- 16x Digital Zoom 12
- Motion Detection 12
- Day & Night Solution 13
- Wired-in Bracket 14
- Dome Type Network Camera 15
- Video Server (Encoder) 15
- Wide Dynamic Range (WDR) 15
- WDR Application 15
- Event Triggered Recording 16
- Multiple Recording Schedules 17
- AVI/ASF Outputs 17
- Smart Search 18
- Multiple Channel Playback 18
- System Requirement 18
- System Features 18
- Monitoring 19
- Configuration 19
- Configuration – Wizard Mode 19
- Configuration – Expert Mode 20
- Management 20
- Adaptation 20
- Recording 21
- IP Surveillance Essential 22
- NTSC and PAL 23
- VGA Resolutions 23
- Megapixel Resolution 23
- Video Compression 24
- Video Codec 24
- Motion JPEG 24
- Compression Format Comparison 25
- Frame Rate 25
- Audio Support 25
- Field of View 26
- Matching Lens and Sensor 26
- F-Number & Exposure 27
- Manual or Automatic Iris 27
- CCD Technology 27
- CMOS Technology 27
- Light Sensitivity 28
- IP Networking Essential 29
- Streaming Technologies 30
- IP Address Assignment 30
- Dynamic DNS (DDNS) 31
- Wireless Standards 31
- Appendix – Bandwidth & 32
- Storage Consideration 32
- Bandwidth Needs 33
- Calculating Storage Needs 33
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