Anywave Communication Technologies
Vivace MPEG2 Encoder User Manual
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Audio Dialnorm: range 1-31:
Dialnorm (Dialog Normalization) is an AC3 parameter that
defines the playback gain of -30 to 0 dB (unity). The value of the Dialnorm parameter in
the AC-3 elementary bit stream shall indicate the level of average spoken dialogue
within the encoded audio program.
Audio Language: Provides language descriptor for the audio stream
.
Second Audio Program (SDI inputs). SDI inputs have second audio input capability
which can support second language or other applications.
To enable the second audio program on these channels, select “audio bitrate 2” to a
desired bit rate.
To disable the second audio
program, select “disable” on the Audio Bitrate 2 option.
5.4
Transport Options
Total Mux Rate: This is the total bitrate (bandwidth) in bits per second (bps) for the
channel. The supported range for SD signals is 3,000,000 to 10,000,000 bps (3-10
Mbps).
Without Statmux,
the video bit rate will be automatically calculated based on the Total
Mux Rate minus the Audio Bitrate minus the Transport Packet overhead
. Transport
overhead includes packetization into MPEG TS format for ATSC compliance and
associated synchronization packets such as PCRs.
With StatMux Transport Options
Min Rate Allocation: This is the target minimum bitrate (bandwidth) in bits per second
(bps) for the channel.
Max Rate Allocation: This is the target maximum bitrate (bandwidth) in bits per second
(bps) for the channel.
Note:
The video bit rate will be automatically calculated based on the Total Mux Rate
minus the Audio Bitrate minus the Transport Packet overhead
. Transport overhead
includes packetization into MPEG TS format for ATSC compliance and associated
synchronization packets such as PCRs.
Example Suggested Bit Rates:
Depending on the number of channels, the picture format (SD or HD), and the output
total mux rate, the settings for your min and max will vary.
The minimum bit rate assigned to all channels cannot add up to more than the Mux
Rate.
To assign a higher priority to a given channel compared to another, provide a higher
minimum bit rate to the higher priority channel.
Example1: 9 SD Channels and total Mux rate of 19.39 Mbps: min 1.25 Mbps, max 3
Mbps
