Audio Engineering

836 Chapter 28

AUD5

AUD5

AUD4

AUD3

AUD1

AUD0

CH1

CH0

Z

AUD2

Bit 9

Bit 8

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

AUD14

AUD14

AUD13

AUD12

AUD10

AUD9

CH8

CH7

AUD6

AUD11

PV

PV

C

U

AUD19

AUD18

AUD17

AUD16

AUD15

V

†† †

LSB MSB

Audio data

AUD0 to AUD19

VUC PAES

SYNC AUX

Next

contiguous

byte on

SMPTE

125 1/F

Set to give even

parity for all bits

marked with asterisk

Set to 1 at beginning

of new channel status block,

otherwise 0

Note: PVPAES

CHI, CH0: 00 channel 1 left

01 channel 1 right

10 channel 2 left

11 channel 2 right

Group n

†By including these inverted bits, these bytes can never

look like a TRS pre-amble

Figure 28.15 : Each EAS subframe is encoded as three contiguous data packets.