Imagine communications Selenio 6800 SFS6803+OP+SFS+, Инструкция по установке и эксплуатации

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89
A
Audio Bit Manipulation
Overview
The tables in this appendix contain information on the manipulation of bits that occur when
using SFS6803
+
and OP
+
SFS
+
modules.
The following items are documented:

Manipulating Channel Status Bits (C-Bit) on page 90

Manipulating Validity and User Bits (V-Bit and U-Bit) on page 92

Identifying Audio Characteristics (Audio Sampling Frequency and Word
Length)
on page 93
Table A-1 Description of Short Forms in the Appendix
RX Key TX Key Sample Rate Indication Audio Word Length
N=Not recognized N=Not
transmitted Byte 0 Bits [6,7],
Byte 4 Bits [3,4,5,6]

[00,0100] = 96 kHz

[01,0000] = 48 kHz

[11,0000] = 32 kHz

[00,1000] = 24 kHz

[00,0101] = 88.2 kHz

[10,0000] = 44.1 kHz

[00,1001] = 22.05 kHz
Byte 2 Bits [0,1,2]

[000] = Maximum word length
20 bits (auxiliary bit use not
indicated)

[001] = Maximum word length
24 bits (auxiliary bits used for
audio)
Byte 2 Bits [3,4,5]

[100] = Encoded word length
=Maximum word length–4 bits

[101] = Encoded word length
=Maximum word length–0 bits
Y=Recognized Y=Transmitted
S=Recognized and
stored,
passed-through,
or both