8
QoS (Quality of Service)
Enhancement Functions
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-G70S 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-G70 employs an FEC function that corrects
errors in transmission at the receiving end. If a
transmission error occurs, the PCS-G70S 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.
PCS-G70 Codec Unit Rear Panel
Stylish Design
With its elegant design and optional stands for both
the camera unit and the codec unit, the PCS-G70S
can fit into even the classiest of conference rooms.
In addition, if you wish to place the camera above a
30” to 50” PDP/LCD TV or monitor, a convenient
optional camera/codec stand, the PCSA-STG50, is
available. This stand neatly houses the codec so that
it is behind the TV or monitor and allows the camera
to be placed above for more natural eye contact
during videoconferences.
Memory Stick Media Support*7
Private phone books can be created and stored on
Memory Stick media. By simply inserting the
Memory Stick media into the PCS-G70S, 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 Media, Memory Stick PRO™
and Memory Stick DUOTM with an adaptor can be used.
Secure Videoconferencing –
Advanced Encryption Standard (AES)
Secure videoconferencing over a network is possible
because the PCS-G70S supports AES 128-bit
encryption. The PCS-G70S 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.
