TANDBERG Voyager E5784, Справочное руководство

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Operating the Equipment Locally: Audio Menu – MPEG Layer 2
Page 4-68 Reference Guide: Voyager E5784 and E5788 HD DSNG Encoder
ST.RE.E10137.3
Table 4.58: Clip Level Options
Selected Option Description
12 dB 12 dB audio clipping level.
15 dB 15 dB is only available with PCB issue 4 and later.
18 dB 18 dB audio clipping level.
21 dB 21 dB audio clipping level.
22 dB 22 dB audio clipping level.
24 dB 24 dB audio clipping level.
Impedance Option
This option is only displayed if the audio source is set to analogue. It
enables the input impedance of the analogue audio input to be set to
either 600 Ω or 20 k Ω .
Language or Language Left/Right Option
This enables the language of the audio channel to be set. If the coding
mode is dual mono, then a different language can be set for the left and
right channels.
De-emphasis Option
This option is turned on in order to de-emphasise pre-emphasised audio
input into the Encoder.
To meet the MPEG Layer 2 audio encoding algorithm specification, the
audio must not have pre-emphasis applied. If the input signal does have
pre-emphasis applied, a de-emphasis filtering process must be applied
prior to encoding.
For a digital audio input, pre-emphasis detection is typically achieved by
monitoring the pre-emphasis flags within the channel status data of the
incoming digital audio signal. The de-emphasis is automatically adjusted
when the Encoder is set to Auto.
For an analogue audio signal, the user must manually select the
appropriate de-emphasis filter.
Copyright Option
This controls the Copyright flag in the bit-stream. If set to On the
bit-stream is shown to be protected by copyright.
Original Option
This controls the setting of the Original flag in the bit-stream. If set to On
the bit-stream will be signalled as an original, if set to Off the bit-stream
will be signalled as a copy of an original bit-stream.
Embedded Source Option
This option defines the embedded source. Select HD-SDI or SD-SDI.