VBrick 9000 Admin Manual page 82

Field
L+R Bit Rate (bits/
sec)
Sample Frequency
Detected Sampling
Frequency
74
Description
Defines the audio encoding bit rate of the audio stream. In general,
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), (3)
the Encode Stereo Inputs as Mono setting (enabled/disabled), and
(4) the Sample Frequency. Valid entries range from 8K–84K for
one-channel encoding and 18K–256K for two-channel encoding.
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, 32, 44.1, and 48kHz are the only sample frequencies
allowed and you must configure the sample rate to match the
sample rate provided by the source device. With digital audio the
configured Sampling Frequency must match the actual Sampling
Frequency.
When an HDMI or SDI source with digital audio is connected to
the encoder and the audio connection is configured for a Digital
L+R selection, you will also see the
below the Sample Frequency to help you choose a matching setting.
Note that all defined Audio Rates must have the same Sample
Frequency.
Note: Both sample frequencies on a dual channel slot must be
the same. 44.1KHz is only allowed for digital audio.
HDMI/SDI. Indicates the measured Sampling Frequency (see
above) when an HDMI or SDI source with digital audio is
connected to the encoder and the audio connection is configured
for a Digital L+R selection. This is useful for determining
configuration mismatches.
Detected Sample Frequency
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