Videoconferencing Room Layout. Huawei VP9050

HUAWEI VP9050 Executive Video Terminal

User Guide

CVideoconferencing Room Layout

C

Videoconferencing Room Layout

When using the terminal, pay attention to your sitting posture to avoid potential back injuries.

Do not stare at the display screen for a long time. Doing so may lead to blurred vision or damage to your eyes.

Layout Precautions











Ensure that there are no large or moving objects behind you. Otherwise, the video cannot be viewed clearly.

Do not use striped patterns as the background.

Do not hold a conference in a room in which sound echoes.

Do not install the terminal near a sound source.

Do not install the terminal in a room where a speaker is placed.

Lighting Precautions

To ensure video quality, do not direct the lens towards bright light.

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User Guide

DGlossary

D

Glossary

Numerics

2 panes

4CIF

720p

D

A

AUDIO IN

AUDIO OUT

Input interface used to connect the terminal to an audio device

Output interface used to connect the terminal to an audio device

C

CIF CIF (Common Intermediate Format), also known as FCIF (Full Common

Intermediate Format), is a format used to standardize the horizontal and vertical resolutions in pixels of YCbCr sequences in video signals, commonly used in video teleconferencing systems. It was first proposed in the H.261 standard. continuous presence A feature in multi-point conferencing that allows the video endpoint to see images from multiple video endpoints at the same time. All parties remain continuously visible or 'present' for the duration of the call and the user can have control over the screen layout. Continuous presence is better suited for team collaboration since it allows participants to see the reactions (body language) of all participants, not just the speaker.

Users see two sites on one monitor in two panes. The two panes are of the same size.

Each pane is about 1/4 of the screen. Use 2-pane as an adjective.

4CIF defines a video resolution of 704 x 576 pixels.

The number 720 stands for the 720 horizontal scan lines of display resolution (also known as 720 pixels of vertical resolution).



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User Guide dual stream

DGlossary

During a conference, two channels of video streams can be sent or received simultaneously. For example, one channel is used for transmitting video (such as video captured by a camera) and the other channel is used for transmitting presentation (such as a computer desktop). The two channels of videos can be displayed on two displays.

G

G.711

G.722

G.711, also known as Pulse Code Modulation (PCM), is a very commonly used waveform codec. G.711 uses a sampling rate of 8,000 samples per second, with the tolerance on that rate 50 parts per million (ppm). Non-uniform quantization

(logarithmic) with 8 bits is used to represent each sample, resulting in a 64 kbit/s bit rate. There are two slightly different versions; μ-law, which is used primarily in

North America, and A-law, which is in use in most other countries outside North

America.

G.722 is a ITU-T standard 7 kHz wideband speech codec operating at 48, 56 and 64 kbit/s. It was approved by ITU-T in November 1988. Technology of the codec is based on sub-band ADPCM (SB-ADPCM).

G.728 give floor

H

H.239

H.261

H.263

G.728 is an ITU-T standard for speech coding operating at 16 kbit/s. It is officially described as Coding of speech at 16 kbit/s using low-delay code excited linear prediction.

After the chair site gives floor to a site, the other sites view and hear the site. All the sites, except the chair site and the site that is given the floor, are muted.

H.239 is an ITU-T recommendation from the H.32x Multimedia Communications' macrofamily of standards for multimedia communications over various networks.

The H.239 recommendation is titled "Role management and additional media channels for H.3xx-series terminals". Practical importance of this recommendation is its setting forth a way to have multiple video channels (for example, one for conferencing, another for presentation) within a single session (call).

H.261 is a 1990 ITU-T video coding standard originally designed for transmission over ISDN lines on which data rates are multiples of 64 kbit/s. It is one member of the H.26x family of video coding standards in the domain of the ITU-T Video

Coding Experts Group (VCEG). The coding algorithm was designed to be able to operate at video bit rates between 40 kbit/s and 2 Mbit/s. The standard supports two video frame sizes: CIF (352x288 luma with 176x144 chroma) and QCIF (176x144 with 88x72 chroma) using a 4:2:0 sampling scheme. It also has a backward-compatible trick for sending still picture graphics with 704x576 luma resolution and 352x288 chroma resolution (which was added in a later revision in

1993).

H.263 is a video codec standard originally designed as a low-bitrate compressed format for videoconferencing. It was developed by the ITU-T Video Coding Experts

Group (VCEG) in a project ending in 1995/1996 as one member of the H.26x family of video coding standards in the domain of the ITU-T. H.263v2 (H.263+) added support for flexible customized picture formats and custom picture clock frequencies.

Previously the only picture formats supported in H.263 had been Sub-QCIF, QCIF,

CIF, 4CIF, and 16CIF, and the only picture clock frequency had been 30000/1001

(approximately 29.97) clock ticks per second.



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V


User Guide

H.264

DGlossary

H.264/AVC/MPEG-4 Part 10 (Advanced Video Coding) is a standard for video compression. The final drafting work on the first version of the standard was completed in May 2003. H.264/AVC is the latest block-oriented motion-compensation-based codec standard developed by the ITU-T Video Coding

Experts Group (VCEG) together with the ISO/IEC Moving Picture Experts Group

(MPEG), and it was the product of a partnership effort known as the Joint Video

Team (JVT). The ITU-T H.264 standard and the ISO/IEC MPEG-4 AVC standard

(formally, ISO/IEC 14496-10 - MPEG-4 Part 10, Advanced Video Coding) are jointly maintained so that they have identical technical content. H.264 is used in such applications as Blu-ray Disc, videos from YouTube and the iTunes Store, DVB broadcast, direct-broadcast satellite television service, cable television services, and real-time videoconferencing. picture in picture Concurrent presence of two videos in different sizes on a monitor with one video superimposing the other. The smaller video is approximately 1/16 the size of the larger one.

R revoke presentation revoke chair

After the chair site revokes the presentation token, the relevant site stop sharing the presentation.

After the chair control rights are revoked, no chair site exists in the conference. If the site that revokes the chair rights wants to become the chair site, the site needs to request chair rights.

T three panes video

Three site videos in equal size are displayed on one monitor, with each occupying

1/4 of the screen.

The video is generally output from the LCD interface of a terminal and is captured by a camera.



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User Guide

EAcronyms and Abbreviations

Numerics

3G

4CIF

C

A

AAC-LD

D

CIF

CDMA

DVI

G

GK

P

I

IMS

PC

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E

Acronyms and Abbreviations

Third Generation Mobile Telephony

4 times Common Intermediate Format

Advanced Audio Coding-Low Delay

Common Intermediate Format

Code Division Multiple Access

Digital Visual Interface

Gatekeeper

IP multimedia subsystem

Personal Computer

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User Guide

U

S

SIP

USB

V

VGA

PPPoE

PTZ

Q

QoS

W

WCDMA

PPP Over Ethernet

Pan/Tilt/Zoom

Quality of Service

Session Initiation Protocol

Universal Serial Bus

Video Graphics Array

Wideband Code Division Multiple Access

EAcronyms and Abbreviations



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Videoconferencing Room Layout. Huawei VP9050

Videoconferencing Room Layout

Layout Precautions

Lighting Precautions

Glossary

Acronyms and Abbreviations

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Videoconferencing Room Layout. Huawei VP9050