AN3318

Characteristics related to HDMI 1.4

Doc ID 18263 Rev 1

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Characteristics related to HDMI 1.4

Protection bandwidth must be large enough to be transparent when a high bit rate is

transferred on the line. The equation below give the relationship between lines, pixels, color

depth and bit rate per channel:

Considering the protection device is equivalent to an RC circuit, the relationship between

For instance, with a 3.4 Gbps data rate:

Figure 6 shows the cut-off frequency of the HSP061-4NY8 is 6 GHz which is high enough to

manage HDMI signals at 3.4 Gbps.

Figure 6.

S21 attenuation measurement

Table 1.

Sample characteristics

CEA video

code

Video format

Horizontal

total pixel

per line

Vertical

total lines

per frame

Frame

rate (Hz)

Color

depth

(bits)

HDMI

data rate

(Gbps)

Lane

data rate

(Gbps)

16

1920 x 1080p

2200

1125

60

24

4.46

1.49

30

5.57

1.86

36

6.68

2.23

48

8.91

2.97

Lane data rate = (H_total_pixels) × (V_total_lines) ×

⎛⎞

Color_depth

⎜

⎜

⎝

⎠

3

× (Frame_rate) ×

10

8

f

= 0.875 × (lane data rate)

cmin

f

= 0.875 × 3.4 Gbps = 2.98 GHz

cmin 3.4 Gbps

10 MHz

30 MHz

100 MHz 300 MHz

1 GHz

3 GHz

-12

-9

-6

-3

0

-12

-9

-6

-3

0

dB

F (Hz)

6 GHz @ -3dB