User's Manual

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Table Of Contents

69

デベロッパーの皆様へ

This

information

includes

everything

product

developers

need

to

know

for

building

native

2K

SDI

equipment.

Of

course,

all

Blackmagic

products

can

be

updated,

so

if

the

television

industry

adopts

an

alternative

SDI-based

film

standard,

we

can

add

support

for

that

too!

FrameStructure



Transmitted

at

23.98,

24

or

25

frames

per

second

as

a

Progressive

Segmented

Frame.



Active

video

is

2048

pixels

wide

by

1556

lines

deep.



Total

lines

per

frame

:

1650



Active

words

per

line

are

1535.

One

word

consists

of

a

10-bit

sample

for

each

of

the

four

data

streams,

i.e.,

a

total

of

40

bits.

See

the

diagram

named

Blackmagic

2K

Format

-

Data

Stream

Format.



Total

active

lines

:

1556



Total

words

per

line

:

1875

for

23.98/24Hz

and

1800

for

25Hz.



Fields

per

frame

:

2,

825

lines

each



Active

lines

located

on

lines

16-793

(field

1)

and

841-1618

(field

2).

TransportStructure



Based

on

SMPTE

372M

Dual

Link

mapping

and

SMPTE

425M-B

support

for

mapping

SMPTE

372M

into

a

single

3

Gb/s

link.



Timing

reference

signals,

line

number

and

line

CRC

insertion

is

the

same

as

above.



During

active

video,

10-bit

Red,

Green

and

Blue

data

is

sent

in

the

following

sequence:



Optional

ancillary

data

is

inserted

into

both

virtual

interfaces.



At

present,

only

audio

data

is

included:

as

per

standard

HD

audio

insertion

(SMPTE

S299M)

the

audio

data

packets

are

carried

on

data

stream

two

and

audio

control

packets

are

carried

on

data

stream

one.



Data

stream

1:

Green_1,

Green_2,

Green_3,

Green_5...Green_2047



Data

stream

2:

Blue_1,

Blue_2,

Green_4,

Blue_5...Green_2048.



Data

stream

3:

Red_1,

Blue_3,

Blue_4,

Red_5...Blue_2048.



Data

stream

4:

Red_2,

Red_3,

Red_4,

Red_6...Red_2048.

Blackmagic



2K



Format



–



Vertical



Timing



Reference

This

diagram

shows

the

vertical

timing

details

with

line

numbers

and

Field,

Vertical

and

Horizontal

bits

for

the

Timing

Reference

Signal

codes.

Field1 Active

F 1 0 0 0 0 0 0 0 0 0 0 0

V 1 1 1 1 1 1 0 0 0 0 1 1

LINE

#

1650 1 2

...

14 15 16

...

792 793

...

825

Field2 Active

F 0 1 1 1 1 1 1 1 1 1 1 1

V 1 1 1 1 1 1 0 0 0 0 1 1

LINE

#

825 826 827

...

839 840 841

...

1617 1618

...

1650