High Definition Television – HDTV - Digital Video and Audio Broadcasting Technology - page 89

In the 1125/60 system (Fig. 5.2.), and with a 10 bit resolution, this re-
sults in a gross physical data rate of:

Y: 74,25 x 10 Mbit/s = 742.5 Mbit/s

B : 0.5 x 74,25 x 10 Mbit/s = 371.25 Mbit/s

R : 0.5 x 74,25 x 10 Mbit/s = 371.25 Mbit/s

----------------

1.485 Gbit/s
gross data rate (1125/60)

Because of the slightly lower sampling rates in the 1250/50 system (Fig.
5.2.), the gross data rate, with 10 bit resolution, is then:

Y: 72 x 10 Mbit/s = 720 Mbit/s

B : 0.5 x 72 x 10 Mbit/s = 360 Mbit/s

R : 0.5 x 7,2 x 10 Mbit/s = 360 Mbit/s

----------------

1.44 Gbit/s
gross data rate (1250/50)

74.25 MHz (1125/60)
72 MHz (1250/50)
(x 2 @ 50/60p 1:1)

+700mV 30 MHz

(x 2 @ 50/60p)

Sync

+300mV

8/10 Bit

Y

A A D

Y

0mV

300mV

1.44 Gbit/s,
1.485 Gbit/s +350mV

8/10 Bit

gross data rate

C B

A A D

C B

2.88 Gbit/s,
2.97 Gbit/s
(@ 50/60p)

350mV

15 MHz
(x 2 bei 50/60p)

8/10 Bit

C R

A A D

C R

15 MHz
(x 2 @ 50/60p)

37.125 MHz (1125/60)
36 MHz (1250/50)
(x 2 @ 50/60p 1:1)

aktive
video

Blanking

Fig. 5.2. Sampling of an HDTV signal according to ITU-R.BT709