Appendix A: Audio Bit Manipulation; Overview - Imagine communications Selenio 6800 Installation And Operation Manual

Overview

Table A-1. Description of Short Forms in the Appendix
RX Key TX Key
N=Not recognized N=Not
transmitted
Y=Recognized Y=Transmitted
S=Recognized and
stored,
passed-through, or
both
HMX6800+BC8 Installation and Operation Manual
Audio Bit Manipulation
The tables in this appendix contain information on the manipulation of
bits that occur when using HMX6800+BC8 modules.
The following items are documented:
• "Manipulating Channel Status Bits (C-Bit)" on page 70
• "Manipulating Validity and User Bits (V-Bit and U-Bit)" on
page 73
• "Identifying Audio Characteristics (Audio Sampling Frequency
and Word Length)" on page 74
Sample Rate Indication Audio Word Length
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
Appendix A
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
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