STV2310D STMicroelectronics, STV2310D Datasheet - Page 19

• Manufacturer Part Number: STV2310D
• Description: Video ICs Digital Video Decodr
• Manufacturer: STMicroelectronics
• Type: High Quality front end videor

Specifications of STV2310D

• Maximum Operating Temperature: + 70 C
• Package / Case: TQFP-64
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

STV2310
4.4
4.4.1
4.4.2
The practical value of the 4 x f
Luminance and Chrominance Separation
General Description
The Y/C Separator separates the chrominance (C) component from the composite signal which
also includes the luminance (Y), synchronization and color burst (subcarrier) components. In
normal operation (NTSC and PAL standards), this is done through comb or notch filtering which
relies on the correlation of consecutive lines. For SECAM inputs, a Chroma Bandpass/Trap filter
system is required. If an S-Video input is selected, Y/C separation is not required and the Y/C
Separator operates in Bypass mode. Y/C delay adjustment can be done with both pixel and sub-
pixel accuracy.
Programming
Once the samples processed by the input SRC have been stored in RAM, the type of input signal
(Y/C or CVBS) must be specified before the chroma component can be separated from the CVBS
input signal. This is done by setting the SVIDEOSEL bit in the
The Y/C separator block can either operate in auto-adaptive mode (Default mode) or Forced
Separation mode (notch). This operating mode is selected by the COMB_MODE bit in the
DDECCONT18
●
●
Chroma Bandpass/Trap filtering is forced
Adaptative Comb Filtering mode is forced. (This applies to PAL/NTSC signals only. SECAM
signals remain processed by Chroma Bandpass/Trap filter)
register:
Figure 10: SECAM Trap Filter Frequency Response
SC
frequency depends on the actual input TV standard.
DDECCONT0
Functional Description
register.
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