Sony PCS-G50 Benutzerhandbuch

SAMPLE SYSTEM CONFIGURATION

PCS-1

PCS-1

IP NETWORK

ISDN

PCSA-B768S

(optional)

Digital Whiteboard

(optional)

Monitor

(optional)

PCS-A1

Speakers
(optional)

Projector

PCS-TL30

 PCSA-B768S

(optional)

PCSA-DSB1S

(optional)

PC
(optional)

Monitor (optional)

PC
(optional)

PCSA-A7

PCS-TL50

(optional)

(optional)

6

PCS-G50 Codec Unit Rear Panel

Private phone books can be created and stored on
Memory Stick media. By simply inserting the
Memory Stick media into the PCS-G50, the unit
automatically recognizes and activates the private
phone book, thereby eliminating the need to re-enter
contact information to place a call.  Memory Stick
media has a number of other uses, such as storing
captured images, PC-generated data, and digital
whiteboard drawings. The media can also be used

for installing and updating software.

*7

In addition to Memory Stick, Memory Stick PRO

TM  

and

Memory Stick DUO

TM

with an adaptor can be used.

Secure videoconferencing over a network is possible
because the PCS-G50 supports AES 128-bit encryption. 
The PCS-G50 offers two encryption modes with an IP
connection, one that complies with the ITU-T H.235
standard, which allows encrypted communication
with other H.235 compliant systems, and another 
that is Sony proprietary, which is ideal when
connecting to other PCS Series systems and offers
higher security. When either of these encryption
modes is active, video, audio, and graphics are
encrypted for the duration of the videoconference.

When holding a videoconference over a network, a
common concern is how to maintain video and audio
quality when the performance of the network is
changing. The PCS-G50 provides three advanced
functions

*8

to enhance QoS over a network:

Adaptive Rate Control (ARC)

The adaptive rate control function automatically 
varies the video data transfer rate to meet changing
network conditions. It also selects the most
appropriate frame rates, which helps prevent video
breakup.

Real-time Auto Repeat Request (ARQ)

The real-time ARQ function recovers lost IP packets.
This is achieved by buffering the packets at the
encoder and resending any that are lost. This feature
helps maintain audio and video quality, and helps
prevent picture collapse even under high network
traffic conditions.

Forward Error Correction (FEC)

The PCS-G50 employs an FEC function that corrects
errors in transmission at the receiving end. If a
transmission error occurs, the PCS-G50 can repair the
data and accurately reproduce the original video signal.

*8

When hybrid mode is selected, the best balance between these 
QoS functions is automatically set to match network conditions.