GVC3200 Video Conferencing System. Video Conferencing System Video Capabilities Network Conditions and Requirement Content Sharing Deployment

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 ConnectionThe 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


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 UI1/3” 2 Megapixel CMOS 1920H x 1080V@30fps

Video Codecs H.264

Video Inputs 1 HDMI / 1 VGA

Video Outputs 3 HDMI

Video Conference1080p, 15fps: up to 4-way video720p, 30fps: up to 5-way videoVGA, 30fps: up to 9-way video

Built-in MCU

GVC3200 Video Capabilities



Video Capabilities


Content Sharing

Deployment

Video Capabilities – Lens and Sensor

• 12 x Optical Zoom

Optical Zoom Digital 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.


Rembrandt’s “The Stone Bridge”

Optical Zoom vs Digital Zoom


• 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.


• 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.


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).


• 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 500-700 lux.


• 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 ProfilePrimarily 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 ProfileThe 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).


• MC: Multipoint Controller

- Manages conferencing creation, endpoint signaling and in-conference controls. - Negotiates parameters with every endpoint in the network and control conferencing resources.


• 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.


• Built-in MCU in GVC3200 - 4-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.


CIF

1080p

720p4CIF

Audio Call

• Video Mixing - GVC3200 can mix video for participants who are using different resolutions


• Video Mixing (continued)- The participant with higher resolution will not be affected by the one with lower resolution

Video Conference Remote Party H.264 Image Size Video Mixing on GVC3200

3-way Conference Participant 1 1080p Participant 1 video remains 1080pParticipant 2 720p 720p

4-way ConferenceParticipant 1 1080p Participant 1 video remains 1080pParticipant 2 720p Participant 2 video remains 720pParticipant 3 4CIF 4CIF

5-way Conference

Participant 1 1080p Participant 1 video remains 1080pParticipant 2 720p Participant 2 video remains 720pParticipant 3 4CIF Participant 3 video remains 4CIFParticipant 4 CIF CIF

Video Capabilities – Resolution

• Resolution The amount of pixels per square inch

• High Definition - 1080p: 1920 width x 1080 height = 2073600 pixels - 720p: 1280 width x 720 height = 921600 pixels

• Other resolutions supported on GVC3200 - 4CIF (704 x 576) - 4SIF (704 x 480) - VGA (640 x 480)

Video Capabilities – Resolution

1080

1920

1280

720

704

576

640

480

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 Rate Media

24 fps Film; high definition vide

23.98 (23.976) fps Film; high definition video with NTSC compatibility; NTSC

25 fps PAL; high definition video

30 fps High definition video;Early black-and-white NTSC video

50 fps / 60 fps High-end HDTV system


Video Capabilities


Content Sharing

Deployment


• 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


• 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.


• 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.


• Minimum bandwidth for HD video on GVC3200 participant:

- 1080p: 1024 kbps - 720p: 512 kbps - VGA: 385 kbps

• Minimum bandwidth for Minimum uplink bandwidth added GVC3200 host up for all the other participants


Resolution Video Bit Rate1080p 1024 kbps – 4096 kbps720p 512 kbps – 2048 kbps4CIF

384 kbps – 1024 kbps4SIFVGA

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


Resolution Video Bit Rate Conference Participant Minimum Bandwidth

Host Minimum Bandwidth

1080p 4096 kbps 4-way 4 Mbps 12 Mbps





720p 512 kbps 5-way 0.5 Mbps 2 Mbps

VGA 1024 kbps 9-way 1 Mbps 8 Mbps

VGA 512 kbps 9-way 0.5 Mbps 4 Mbps

VGA 384 kbps 9-way 0.375 Mbps 3 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 Video bit rate: 1Mbps

Video bit rate: 1MbpsVideo bit rate: 1Mbps

Host



• 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 Capabilities


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 Capabilities


Content Sharing

Deployment

Deployment

Internet

Boston HQ

Los AnglesRemote Office

Remote Office

Remote Office

New York

THANK YOU!

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Asia Pacific: [email protected]

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Documents

GVC3200 Video Conferencing System. Video Conferencing System Video Capabilities Network Conditions and Requirement Content Sharing Deployment