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Dolby® Encoding and Monitoring
Encode Mode
Use the Encode Mode control (7-5A) to choose between Dolby Digital Plus (E-AC-3) or Dolby Digital (AC-3).
For ATSC 1.0 applications, Dolby Digital is the proper choice.
Channel Mode
The Channel Mode control (7-5B) determines the channel output mode of the encoder, either 2.0 (L,R) for
2-channel content, or 5.1 (L,R,C,LFE,Ls,Rs) for 5.1-channel content.
Bit Rate
The optimal bitrate for any given application – set by the Bit Rate control (7-5D) - will depend on a number of
variables including channel mode, available bandwidth, and desired audio quality. The default bitrates are listed
below.
Channel
Configuration
Stereo (2/0)
5.1
Figure 7-5 – Basic Dolby Digital Plus encoder menu
Default
Dolby Digital
(AC-3) Bit Rate
192 kbps
384 kbps
Chapter 7 | 39
Default
Dolby Digital Plus
(E-AC-3) Bit Rate
128 kbps
192 kbps
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