Musicam Roadrunner Instrukcja Użytkownika Pobierz pdf (Strona 14)

Prima LT USERS GUIDE

6-146-14

Encoder Algorithm

G.722 MPEG Layer 2 Mpeg Layer 3

Single Line

ü ü ü

Dual Line

ü ü

Ind. Mono

ü ü

H.221 2 Line

Select the encoder line format at the Line Fmt display. If you select 1 Ln,

you will then be prompted for the line number to use, 1 or 2. If you

select Ind. Mono you will be prompted to enter the line number for the

left and right channels. If CCS 2 LN mode is selected, you will not be

prompted to enter lines, since both available lines are used.

For MPEG Layer II or G.722 Independent Mono operation, you will be

prompted to enter the lines to use for the left and right channels, and

for MPEG Layer II, which channels to use for ancillary data.

From a terminal, use the ELI command to select the line format.

6.1.3.4 Encoder Bit Rate

After selecting the encoder algorithm and line format, you need to

select the bit rate. You will be given only appropriate choices for the

algorithm/line format/Digital Interface selected.

For G.722, and MPEG operation in the 1-line or Independent Mono

modes with an internal terminal adapter, the only available bit rates are

56 and 64 kb/s. For 2-line operation, only 112 and 128 kb/s is offered.

For MPEG operation in the 1-line mode with a non-TA Digital Interface,

you have a choice of all supported bit rates.

Select the encoder bit rate at the Bit Rate prompt or use the EBR

command from a terminal.

6.1.3.5 Encoder Sample Rate

The next step (for MPEG algorithms only) is to select the encoder

sample rate. The choices are 16 (not available with MPEGL Layer 3),

24, 32 and 48 kHz. Select the desired sample rate at the Samp Rate

prompt or use the ESR command from a terminal.

For G.722, the encoder sample rate is fixed and cannot be changed,

therefore, no selection is offered.

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