TANDBERG 770 用户手册

44

TANDBERG Videoconferencing System

Advanced use

Call quality

The Call Quality menu allows you to select the preferred quality of your call.

D

UE

 

TO

 

ACTIONS

 

OR

 

LIMITATIONS

 

AT

 

THE

 

FAR

 

END

 

YOU

 

MAY

 

NOT

 

ALWAYS

 

BE

 

ABLE

 

TO

 

ACHIEVE

 

THE

 

SELECTIONS

 

YOU

 

WANT

.

Audio

Auto

Optimized audio quality depending on bandwidth.

High

High audio quality (G722) regardless of bandwidth.

Normal

Telephone quality (G728) regardless of bandwidth.

Video*

Auto

Will select ‘Motion’ or ‘Sharpness’ depending on selected video source**.

Motion

Optimized for smooth motion video for all video inputs.

Sharpness

Optimized for sharp video for all video inputs.

Natural Video

Choose at what call quality level Interlaced video capabilities(iCIF) will be transmitted and enabled.

Auto

Interlaced video capabilities (iCIF) will be transmitted and enabled.

Off

Interlaced capabilities will not be transmitted. Useful if far end can not handle these capabilities.

H.264

Auto

Optimized video quality depending on what is available.

Off

H.264 video compression and decompression will not be used.

VGA Resolutions

Auto

VGA capabilities (VGA/SVGA/XGA) and SIF capabilities will be transmitted and enabled.

Off

VGA capabilities will not be transmitted. Useful if far end can not handle these capabilities.

SIF 

CAPABILITIES

 

WILL

 

ENABLE

 

BETTER

 

VIDEO

 

QUALITY

 

FOR

 NTSC 

SYSTEMS

 (SIF: 352

X

240, ISIF: 352

X

480, 4SIF: 704

X

480).

A

UTO

1-4 

CHANNELS

:

G722.1 

IS

 

SELECTED

.

5 

OR

 

MORE

 

CHANNELS

: G722 

IS

 

SELECTED

.

NOTE

*

- If  option ‘Presenter’ is not installed or if H263 is not used, only CIF resolution will be used for all selections.

**

- MainCam/Aux/VCR will select ‘Motion’. DocCam/PC will select ‘Sharpness’.

TIP

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