Manual

AN22
8 AN22REV2
source has copy protection asserted, then the L bit
must be used to determine whether the data can be
recorded.
The L bit determines whether the source is an orig-
inal (or prerecorded) work, or is a copy of an orig-
inal work (first generation or higher). The actual
meaning of the L bit can only be determined by
looking at the category code since certain category
codes reverse the meaning.
If the category code is CD (1000000) and the copy
bit alternates at a 4 to 10Hz rate, the CD is a copy
of an original work that has copy protection assert-
ed and no recording is permitted.
BYTE 1 - Category Code 101
bits3456Musical Instruments, mics, etc.
* 0000Synthesizer
* 1000Microphone
XXXXAll other states are reserved
BYTE 2
bits0123Source Number
0000Unspecified
10001
01002
11003
00104 to
011114 (binary - 0 is LSB, 3 is MSB)
111115
bit 4567Channel Number
0000Unspecified
1000A (Left in 2 channel format)
0100B (Right in 2 channel format)
1100C to
0111N (binary - 4 is LSB, 7 is MSB)
1111O
BYTE 1 - Category Code 110
bits3456Magnetic tape or disk
0000DAT
* 1000Digital audio sound VCR
XXXXAll other states are reserved
BYTE 3
bits0123Fs: Sample Frequency
000044.1 kHz
010048 kHzr
110032 kHz
1100Sample-rate converter
XXXXAll other states are reserved
bits 4 5 Clock Accuracy
00 Level II, ±1000 ppm (default)
0 1 Level III, variable pitch
10 Level I, ±50 ppm - high accuracy
11 Reserved
bits 6 7
XX Reserved
BYTE 4 - 23
Reserved
* Data from draft of IEC 958 proposed amendment (from TC84). Has not recieved approval yet.
Table 5. Consumer Channel Status Bytes 1-23