Circuit Operating Descriptions
13-4
Samsung Electronics
13-2 Video
BD Video
Decoder
(U30)
A/V Decoder
(U1)
Scaler
(U601)
Video DAC
(VIC4)
Y
HDMI
Y
Pb
Pr
Y/C
CVBS
Pb
Pr
Video Amp
(VIC3)
Video Amp
(VIC2)
HDMI Tx
(HIC4)
Video DAC
(VIC7)
CPLD
(U704)
DVD Decoder
(U20)
Video
Pr
Pb
Y
Y
C
Y data
Cb data
Cr data
Y data
C data
Y data
Y data
C data
TS
Cb data
Cr data
Video
data
Fig. 13-5
Sources of video signal is separated into BD and DVD, and the signal routes are different with the playing disc.
13-2-1 BD Playback
Output data from Loader is inputted by U1. U1 decodes these signals which are consisted of BD format and
passes TS (Transport Stream) to U30.
U30 separates Video data from, and does MPEG decoding. Decoded signal is displayed by Y 8 bit C (signal that
become Cb, Cr mux) 8 bit forms. The data rate differs to source on the disc, 1080 and 720p modes are 74.175MHz,
and 576i/480i mode is 27MHz. These signals are inputted by U1 again, mixed with graphic data.
Output format is Y 8 bits, Cb 8 bits, Cr 8 bits. Output signals from U1 are inputted to U601 and U704 at the
same time, route is selected to last output mode.
In case of the output mode is HDMI, signal inputted to U601 is scaled by resolution of last output specification
and transferred to HIC4. Format of these signals are Y 8 bits, Cb 8 bits, Cr 8 bits. Data rate is decided by final
output mode. 1080p mode-148.35 MHz, 1080i/720p mode-74.175 MHz, 576p/480p mode-27 MHz. Signal inputted
to HIC4 is displayed finally becoming encoding by HDMI format. HDMI jack is not displayed by 576i/480i
modes.
Also, there is Hot Plug Detection pin (pin 19) on HDMI jack, this pin can confirm connection state with TV
according. If this pin is 0~0.4 V, TV is not connected with this system. If this pin is 2.0~5.0 V, TV is connected
with this system by HDMI cable. Set changes the output mode to HDMI mode, or returns previous mode
according to this status.
In case of the output mode is Component, route is selected unusually to resolution.
When the output mode is 1080i/720p/576p/480p, signals that become scaling in U601 are outputed. VIC4
receives these signals and changes to analog signal. VIC4 has 11 bits resolution. Converted signals are forms of
analog Y, Pb, Pr, and change finally to output level through VIC3 video amp and are displayed. VIC3 does togeth-
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