Chapter 6 Audio Configuration
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205
Ellipse 3000 Release 3.0, Rev. B
Coding Scheme Configuration
6.5.6.3
Dynamic Range Control Parameters
Compression Preset
Use this parameter to select a Dynamic Range Preset that defines the compression characteristic
that is applied to the Dolby Digital bitstream during decoding.
The options are:
■
None
■
Film Standard
❑
Max Boost: 6 dB (below -43 dB)
❑
Boost Range: -43 to -31 dB (2:1 ratio)
❑
Null Band Width: 5 dB (-31 to -26 dB)
❑
Early Cut Range: -26 to -16 dB (2:1 ratio)
❑
Cut Range: -16 to +4 dB (20:1 ratio)
■
Film Light
❑
Max Boost: 6 dB (below -53 dB)
❑
Boost Range: -53 to -41 dB (2:1 ratio)
❑
Null Band Width: 20 dB (-41 to -21 dB)
❑
Early Cut Range: -26 to -11 dB (2:1 ratio)
❑
Cut Range: -11 to +4 dB (20:1 ratio)
■
Music Standard
❑
Boost Range: 55 to -31 dB (2:1 ratio)
❑
Null Band Width: 5 dB (-31 to -26 dB)
❑
Early Cut Range: -26 to -16 dB (2:1 ratio)
❑
Cut Range: -16 to +4 dB (20:1 ratio)
■
Music Light – (No early cut range)
❑
Max Boost: 12 dB (below -65 dB)
❑
Boost Range: -65 to -41 dB (2:1 ratio)
❑
Null Band Width: 20 dB (-41 to -21 dB)
❑
Cut Range: -21 to +9 dB (2:1 ratio)
■
Speech
❑
Max Boost: 15 dB (below -50 dB)
❑
Boost Range: -50 to -31 dB (5:1 ratio)
❑
Null Band Width: 5 dB (-31 to -26 dB)
❑
Early Cut Range: -26 to -16 dB (2:1 ratio)
❑
Cut Range: -16 to +4 dB (20:1 ratio)
RF Overmodulation Protection
Use this parameter to enable additional protection for bitstreams that are decoded in RF
Compression mode and modulated, for example in set-top boxes.
