S5D2650 Samsung Semiconductor, Inc., S5D2650 Datasheet - Page 26

• Manufacturer Part Number: S5D2650
• Description: Multistandard Video Decoder/scaler
• Manufacturer: Samsung Semiconductor, Inc.

S5D2650 Data Sheet
MULTIMEDIA VIDEO
Figure 21.
De-emphasis Filter Frequency Response
1.4.5. Additional Chroma Functions
S5D2650 has many built in auto detection circuits. These allow S5D2650 to track any type of video standard input
automatically.
For analog component video input, the demodulation function is not enabled. The low pass filter provides a group
delay for Cb and Cr alignment. This enables the two components to be sampled by one ADC.
An RTCO serial output is provided that encodes the current chroma and pixel frequency of the decoder. This
information can be used by an Encoder running off of the decoder clock to produce proper color output. The
horizontal position of the serial signal is controlled by the HS2 location. The phasing of the DTO and the Encoder
can be reset using the RTC_DTO bit. For PAL mode, the PID polarity can be controlled with the RTC_PID bit.
1.5. COMB FILTER
Comb filters provide superior Y/C separation for composite NTSC and PAL than simple chroma trap filter. The
S5D2650 contains on-chip separate 2-line stored luma and chroma comb filters. An internal signal COMB controls
for what lines the comb function is enabled. This signal is available through the PORTB pin. Combing is part of the
vertical processing which also includes vertical scaling, which is discussed in Section 1.6. A block diagram for the
vertical processing section is shown in Figure 22.
PAGE 26 OF 95
7/18/03
ELECTRONICS