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MN673794 Datasheet

  • MN673794

  • LSI FOR MPEG

  • 671.99KB

  • 42頁(yè)

  • PANASONIC

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LSI for MPEG
MN673794
1. Overview
This IC is used to process a variety of items including the following ones: NTSC/PAL signal (Y/C and
composite video) I/O, 3D Y/C separation, TBC, DD conversion, frame sync, sync/clock generation, Rec
656 I/O.
Features
鈻?/div>
Analog input block
Composite video/Component Y input (10 bits at 27.0 MHz)
Component C input (10 bits at 27.0 MHz)
鈻?/div>
Analog control block
AGC (Auto Gain Control), clamp control, ACC (Auto Color Control)
鈻?/div>
Digital I/O block
Digital video I/O (ITU-R Rec 656: Y/Cr/Cb multiple, 8 bits at 27 MHz)
Digital video input clock must be synchronized with the system clock of 27 MHz.
鈻?/div>
Signal processing block
3D Y/C separation (image movement adaptive processing: NTSC), 2D Y/C separation (PAL)
TBC (Time Base Corrector) processing (velocity error correction/jitter correction)
Frame sync processing (See Note.)
NR processing (Y/C recursive NR)
Y/C separation is performed only in two dimensions (due to memory sharing) when the NR function is
in use.
鈻?/div>
Copyright VBLK detection
Macrovision (AGC pulse and color stripe) detection
VBID detection
Closed caption detection
WSS detection
Note: This IC uses a 27-MHz fixed clock. Therefore, input signals into the IC are not synchronized with
output signals from the IC. Therefore, a frame-skip or frame-hold occurs to standard and nonstandard
signals, the frequency of occurrence of which varies with the difference in frame frequency between
input signals and the 27-MHz fixed clock.
If the user does not want the occurrence of any frame-skip or frame-hold to standard signals,
externally generate 27-MHz clock pulses synchronized with the frames of the input signals, and input
the clock pulses into the IC.
A frame-skip refers to loss of the image in a single frame.
A frame-hold refers to the duplicated output of the image in the previous frame. *1
Publication date: January 2003
SDF00032BEM
1

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