bt829bkrf ETC-unknow, bt829bkrf Datasheet - Page 28

• Manufacturer Part Number: bt829bkrf
• Description: Video Streamii Decoders
• Manufacturer: ETC-unknow

18
1.0 Functional Description
1.6 Y/C Separation and Chroma Demodulation
Figure 1-4. Y/C Separation and Chroma Demodulation for Composite Video
Figure 1-5. Y/C Separation Filter Responses
Composite
Luma Notch Filter Frequency Responses for NTSC and PAL/SECAM
NTSC
1.6 Y/C Separation and Chroma Demodulation
Y/C separation and chroma decoding is illustrated in Figure 1-4. Bandpass and
notch filters are implemented to separate the composite video stream. Figure 1-5
displays the filter responses. The optional chroma comb filter is implemented in
the vertical scaling block. See the Video Scaling, Cropping, and Temporal Deci-
mation section in this chapter.
PAL/SECAM
Band-Pass Filter
Notch Filter
D829BDSA
Chroma Band Pass Filter Frequency Responses for NTSC and PAL/SECAM
cos
sin
Low-Pass Filter
Low-Pass Filter
NTSC
VideoStream II Decoders
Bt829B/827B
PAL/SECAM
Y
U
V