Name

Stereo as Mono?

AAC-HE

Sample Freq

 

Bit Rate

 

 

 

 

 

 

 

High Quality Voice

Off

 

24k

56k

 

28k

 

 

 

 

 

 

 

Standard Voice

Off

 

16k

32k

 

18k

 

 

 

 

 

 

 

Based on Audio Source. †† Default template.

Template

This read-only field shows the template (if any) that is currently

 

applied. If a template is applied, it will display Parameters Match or

 

Parameters Do Not Match (depending on whether or not changes

 

have been applied).

 

 

Encode Stereo Inputs

If two physical connectors are defined as being used for stereo,

as Mono

there will be one configuration for the stereo pair, that is the two

 

physical connectors represent a single audio source.

 

 

AAC-HE

AAC-HE is a highly-efficient audio compression technology that

 

uses spectral bandwidth replication (SBR). AAC-HE is optimized

 

for better quality at lower bit rates.

 

 

L+R Bit Rate (bits/

Defines the audio encoding bit rate of the audio stream. In general,

sec)

higher bit rates provide better audio quality. The range of selectable

 

values for this parameter is determined by (1) the Audio Source

 

(Stereo or Mono), (2) the AAC-HE setting (enabled/disabled), and

 

(3) the Encode Stereo Inputs as Mono setting (enabled/disabled).

 

 

Sample Frequency

Defines the frequency (or sampling rate) at which the audio is

 

sampled at the encoder. In general, higher sampling frequencies

 

provide better audio quality. Lower sampling frequencies however,

 

use less CPU resources, support lower bit rates, and provide

 

increased compression efficiency. The range of selectable values for

 

this parameter is determined by the L+R Bit rate setting. With

 

Digital Audio, 48k is the only sample frequency allowed. ‘

 

 

42

© 2009 VBrick Systems, Inc.

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VBrick Systems 7000 manual Aac-He

7000 specifications

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