GVC3200 Video Conferencing System

Video Conferencing System  Video Capabilities  Network Conditions and Requirement  Content Sharing  Deployment

Endpoint Video conferencing codec unit, Camera, Microphone, Speaker, Video display. Multipoint Control Unit (MCU) A device commonly used to bridge video conferencing connections. It provides the capability for three or more endpoints to participate in a multipoint conference. Conference Server Provides call control and services. Network Connection The connection that carries data between video systems communicating with each other. The connection capability determines video performance and quality of service. Video Conferencing System Components Video Conferencing System

Lens 12x optical zoom, +/-23° tilt, +/- 90° pan, 70°(W)* - 6.3° (T) field of view Camera PTZ camera controlled by remote control or web UI 1/3” 2 Megapixel CMOS 1920H x Video Codecs H.264 Video Inputs 1 HDMI / 1 VGA Video Outputs 3 HDMI Video Conference 1080p, 15fps: up to 4-way video 720p, 30fps: up to 5-way video VGA, 30fps: up to 9-way video Built-in MCU GVC3200 Video Capabilities Video Conferencing System

 Video Conferencing System Video Capabilities  Network Conditions and Requirement  Content Sharing  Deployment

Video Capabilities – Lens and Sensor 12 x Optical Zoom Optical ZoomDigital Zoom  Optical zoom gets up close using an actual lens adjustment.  It changes the magnification of images with the actual optical glass before the images reach the imaging sensor.  By moving the lens farther from the image sensor, the zoom increases because a smaller portion of the scene strikes the image sensor, resulting in magnification.  Digital zoom is a technology where the camera shoots the photo and then crops and magnifies it to create an artificial close-up photo.  This process requires magnifying or removing individual pixels, which can cause image quality degradation.

Video Capabilities – Lens and Sensor Rembrandt’s “The Stone Bridge” Optical Zoom vs Digital Zoom

Video Capabilities – Lens and Sensor A pan–tilt–zoom camera (PTZ camera) is a camera that is capable of remote directional and zoom control +/-23° tilt, +/-90° pan, 70°(W)* - 6.3° (T) field of view Front View, Showing Pan Side View, Camera Tilted Zoom In, Zoom Out

Video Capabilities – Image Signal Processing Auto Focus - Automatically focus on a manually selected area. - Ensures consistently sharp video whenever the camera is adjusted, preset is applied or the device is rebooted.

Video Capabilities – Image Signal Processing Auto White Balance - Images in different sources of light have different “color temperature”. The images might comes out with an orange, blue, yellow etc look – despite the fact that to the naked eye the scene looks quite normal. - White balance (WB) is the process of removing unrealistic color casts, so that objects which appear white in person are rendered white in your photo.

Video Capabilities – Image Signal Processing Recommended color temperature for conference room is 3,000-3,800K - The color temperature of the electromagnetic radiation emitted from an ideal black body is defined as its surface temperature in Kelvin (K).

Video Capabilities – Image Signal Processing Auto Exposure - Control exposure without user having to make individual settings for each exposure reading or change in scene luminance. - Characterize brightness: Luminance. Most offices: 250 – 500 lux Offices that involve drawing or other detail work: 750 – 1,000 lux Recommended luminance for conference room is lux.

Video Capabilities – Image Signal Processing Noise Reduction - Image noise is random (not present in the object imaged) variation of brightness or color information in images, and is usually an aspect of electronic noise.

Video Capabilities – Encoding High compression performance compared with H.263. Less bandwidth is required to deliver same quality video. Baseline Profile Primarily for low-cost applications that require additional data loss robustness, this profile is used in some video conferencing and mobile applications. This is the default setting in GVC3200. Main Profile This profile is used for standard-definition digital TV broadcasts that use the MPEG-4 format as defined in the DVB standard. High Profile The primary profile for broadcast and disc storage applications, particularly for high-definition television applications (for example, this is the profile adopted by the Blu-ray Disc storage format and the DVB HDTV broadcast service). H.264 BP/MP/HP

Video Capabilities – MCU MCU: Multipoint Control Unit - When three or more end-points (participants, remote sites, etc) need to connect, a video conference "bridge" – MCU, must be used. - Two logical components: 1. A single Multipoint Controller (MC) 2. Multipoint Processors (MP).

Video Capabilities – MCU MC: Multipoint Controller - Manages conferencing creation, endpoint signaling and in-conference controls. - Negotiates parameters with every endpoint in the network and control conferencing resources.

Video Capabilities – MCU MP: Multipoint Processor - While the MC controls resources and signaling negotiations, the MP operates on the media plane and receives media from each endpoint. - The MP generates output streams from each endpoint and redirects the information to other endpoints in the conference.

Video Capabilities – MCU Built-in MCU in GVC way video conference at 1080p HD, 15fps - 5-way video conference at 720p HD, 30fps - 9-way video conference in VGA quality, 30fps New participants establishes Audio call if maximum number of video participants is reached.

Video Capabilities – MCU CIF 1080p 720p 4CIF Audio Call Video Mixing - GVC3200 can mix video for participants who are using different resolutions

Video Capabilities – MCU Video Mixing (continued) - The participant with higher resolution will not be affected by the one with lower resolution Video ConferenceRemote PartyH.264 Image SizeVideo Mixing on GVC way Conference Participant 11080pParticipant 1 video remains 1080p Participant 2720p 4-way Conference Participant 11080pParticipant 1 video remains 1080p Participant 2720pParticipant 2 video remains 720p Participant 34CIF 5-way Conference Participant 11080pParticipant 1 video remains 1080p Participant 2720pParticipant 2 video remains 720p Participant 34CIFParticipant 3 video remains 4CIF Participant 4CIF

Video Capabilities – Resolution Resolution The amount of pixels per square inch High Definition p: 1920 width x 1080 height = pixels - 720p: 1280 width x 720 height = pixels Other resolutions supported on GVC CIF (704 x 576) - 4SIF (704 x 480) - VGA (640 x 480) 1080p (1920x1080)

Video Capabilities – Resolution 1080p (1920x1080)

Video Capabilities – Frame Rate Frame Rate - Frame: the frequency at which an imaging device produces unique consecutive images. - Frame rate: frames per second (FPS), also expressed in Hz. - The higher the frame rate is, the smoother the video is. Meanwhile, more pixels are transferred per second. Thus higher bandwidth is required.

Video Capabilities – Frame Rate Frame RateMedia 24 fpsFilm; high definition vide (23.976) fpsFilm; high definition video with NTSC compatibility; NTSC 25 fpsPAL; high definition video 30 fps High definition video; Early black-and-white NTSC video 50 fps / 60 fpsHigh-end HDTV system

 Video Conferencing System  Video Capabilities Network Conditions and Requirement  Content Sharing  Deployment

Network Conditions and Requirement Network Congestion causes packet loss. Video quality is degraded when there is packet loss. How to prevent network congestion: - VLAN Broadcast Control: VLAN reduces broadcast traffic as each broadcast will be sent on to the relevant VLAN. - Layer 3 QoS QoS for RTP: 48 QoS for SIP: 24 - Upgrade network service : get higher bandwidth

Network Conditions and Requirement FEC for packet loss concealment - The sender encodes the message in a redundant way by using an error-correcting code. - The redundancy allows the receiver to detect a limited number of errors and correct these errors without retransmission.

Network Conditions and Requirement Bit rate The number of bits that are conveyed or processed per unit of time. With the same resolution, if higher video bit rate is used, less compression is needed. Thus video quality is better. Adjust the video bit rate based on the network environment - Increasing the video bit rate may improve video quality if the bandwidth is permitted. - If the bandwidth is not permitted, the video quality will decrease due to packet loss.

Network Conditions and Requirement Minimum bandwidth for HD video on GVC3200 participant: p: 1024 kbps - 720p: 512 kbps - VGA: 385 kbps Minimum bandwidth for Minimum uplink bandwidth added GVC3200 host up for all the other participants

Network Conditions and Requirement ResolutionVideo Bit Rate 1080p1024 kbps – 4096 kbps 720p512 kbps – 2048 kbps 4CIF 384 kbps – 1024 kbps 4SIF VGA Most High Definition videoconferencing systems require 1M of symmetric bandwidth (up and down). Typically any quality broadband IP network connection can be used for successful video conferencing. GVC3200 H.264 Image Size and Video Bit Rate

Network Conditions and Requirement ResolutionVideo Bit RateConference Participant Minimum Bandwidth Host Minimum Bandwidth 1080p4096 kbps4-way4 Mbps12 Mbps 1080p2048 kbps4-way2 Mbps6 Mbps 1080p1024 kbps4-way1 Mbps3 Mbps 720p2048 kbps5-way2 Mbps8 Mbps 720p1024 kbps5-way1 Mbps4 Mbps 720p512 kbps5-way0.5 Mbps2 Mbps VGA1024 kbps9-way1 Mbps8 Mbps VGA512 kbps9-way0.5 Mbps4 Mbps VGA384 kbps9-way0.375 Mbps3 Mbps

Network Bandwidth Requirement Example Assuming all conference members have video bit rate set to 1024 kbps (1Mbps), - Host location: 1Mbps per remote participant x 4 = 4Mbps up and down - Remote participant location: 1Mbps up and down Video bit rate: 1Mbps Host Network Conditions and Requirement

Gigabit network port (RECOMMENDED for video conferencing) Built-in WiFi - 5Ghz band has less interference compared to 2.4Ghz band - Designed for 1-way 1080p call - Use wired connection for video call stability and performance. Pre-installed Speedtest.net app for testing local and Wi-Fi network bandwidth

 Video Conferencing System  Video Capabilities  Network Conditions and Requirement Content Sharing  Deployment

Content Sharing Dual-stream to support People + Content in one call Review and markup documents View web content 1 HDMI / 1 VGA input HDMI has higher priority when both are plugged in Share any computer or tablet screen with other attendees:

Content Sharing Binary Floor Control Protocol (BFCP) is supported on GVC3200 SIP server must support BFCP for content sharing – IPVideoTalk Pro / UCM Conference participants must support BFCP to view the content – GXV3275/3240 Conference Host Participant GVC3200 A Participant GVC3200 B Participant GXV3275 Protocol:

Content Sharing Participant can press the PIP button on the remote control to adjust display mode. -Presentation only, Presentation + Local video -Presentation + Remote video -Presentation + Local video + Remote video PresentationLocal Video Remote Video

 Video Conferencing System  Video Capabilities  Network Conditions and Requirement  Content Sharing Deployment

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