Sabre32 Reference Datasheet

CONFIDENTIAL ADVANCE

INFORMATION Rev. 1.2

February 11, 2010

www.esstech.com

22

Vista™

High Definition

Vista™

High Definition

SPDIF CHANNEL STATUS - Professional configuration (Base Address = 48)

Address

Offset

[7]

[6]

[5]

[4]

[3]

[2]

[1]

[0]

0

sampling frequency:

00: not indicated (or see byte

4)

10: 48 kHz

01: 44.1 kHz

11: 32 kHz

lock:

0: locked

1: unlocked

emphasis:

000: Emphasis not indicated

001: No emphasis

011: CD-type emphasis

111: J-17 emphasis

0:Audio

1:Non-audio

0:Consumer

1:Professional

1

User bit management:

0000: no indication

1000: 192-bit block as channel status

0100: As defined in AES18

1100: user-defined

0010: As in IEC60958-3 (consumer)

Channel mode:

0000: not indicated (default to 2 ch)

1000: 2 channel

0100: 1 channel (monophonic)

1100: primary / secondary

0010: stereo

1010: reserved for user applications

0110: reserved for user applications

1110: SCDSR (see byte 3 for ID)

0001: SCDSR (stereo left)

1001: SCDSR (stereo right)

1111: Multichannel (see byte 3 for ID)

2

alignment level:

00: not indicated

10: –20 dB FS

01: –18.06 dB FS

Source Word Length:

If max=20bits

|If max=24bits

000=Not indicated

|000=Not

indicated

100 = 23bits

|100 = 19bits

010 = 22bits

|010 = 18bits

110 = 21bits

|110 = 17bits

001 = 20bits

|001 = 16bits

101 = 24bits

|101 = 20bits

Use of aux sample word:

000: not defined, audio max 20 bits

100: used for main audio, max 24 bits

010: used for coord, audio max 20 bits

110: reserved

3

Channel identification:

if bit 7 = 0 then channel number is 1 plus the numeric value of bits 0-6 (bit reversed).

if bit 7 = 1 then bits 4–6 define a multichannel mode and bits 0–3 (bit reversed) give the channel number within that mode.

4

fs scaling:

0: no scaling

1: apply factor of

1 / 1.001 to value

Sample frequency (fs):

0000: not indicated

0001: 24 kHz

0010: 96 kHz

1001: 22.05 kHz

1010: 88.2 kHz

1011: 176.4 kHz

0011: 192 kHz

1111: User defined

Reserved

DARS (Digital audio reference

signal):

00: not a DARS

01: DARS grade 2 (+ / –10 ppm)

10: DARS grade 1 (+ / –1 ppm)

11: Reserved

5

Reserved

6-9

alphanumerical channel origin: four-character label using 7-bit ASCII with no parity. Bits 55, 63, 71, 79 = 0.

10-13

alphanumerical channel destination: four-character label using 7-bit ASCII with no parity. Bits 87, 95, 103, 111 = 0.

14-17

local sample address code: 32-bit binary number representing the sample count of the first sample of the channel status block.

18-21

time of day code: 32-bit binary number representing time of source encoding in samples since midnight

22

reliability flags

0: data in byte range is reliable

1: data in byte range is unreliable

23

CRCC

00000000: not implemented

X: error check code for bits 0–183

Table 8