UPD61052 NEC, UPD61052 Datasheet - Page 17

• Manufacturer Part Number: UPD61052
• Description: MPEG2 Audio / Video Encoder
• Manufacturer: NEC

2.1.3
(1) Video input
(2) Picture size conversion filter
(3) Time base corrector (TBC)
(4) Noise reduction
(5) Slicer
The video input format is ITU-R BT.656 (8-bit Y/Cb/Cr the 4:2:2 format) and 8-bit Y/Cb/Cr which deals with the
4:2:0 format. The horizontal synchronization signal, the vertical synchronization signal and the field index can be
used without using SAV and EAV. In this case, IVFLD can be used by taking with IVVSYNC or it judges a field
judgment in the polarity of IVHSYNC behind the falling edge two clock of IVVSYNC. It judges that an odd field is
'H' and an even field is 'L'. IVVSYNC and IVHSYNC need the high / low period more than 3 IVCLK. The
video-input unit watches over the synchronization signals and detects synchronous error.
For adapting to the bit rate of the stream, the picture size of the encoding can be changed. In addition, picture
size changed with the external filter to the 4:2:0 format can be inputted directly, too.
It has a frame-type TBC. It is possible to make stable encoding of the channel changing and the nonstandard
video signal such as VTR. When using TBC, it needs over 64 Mbits SDRAM. The following video signals can be
corrected.
Respectively the noise reduction of the luminance signal and the color signal can be set three levels
Slicer decodes the luminance signal to the vertical blanking data. It detects VBID, Closed Caption, and Wide
Screen Signal. The host CPU can read, and stop encoding and re-write the copy control information in VBID and
the Wide Screen Signal, on the host CPU interface.
Input/output processing
4:2:2
4:2:0
Format
Remark IVCLK: 27 MHz
NTSC
PAL
Odd/even lines
Odd lines
Even lines
Table 2-2. Input Video Data Arrangement
Table 2-3. Correctable Video Signals
Line
1626 to 1806 IVCLK/H
1628 to 1828 IVCLK/H
Data Sheet S15082EJ4V0DS
Horizontal Sync
Cb0, Y0, Cr0, Y1, Cb1, Y2, Cr1, Y3, Cb2, Y4, Cr2, Y5, …
Cb0, Y0, Cr0, Y1, Cb1, Y2, Cr1, Y3, Cb2, Y4, Cr2, Y5, …
(-), Y0, (-), Y1, (-), Y2, (-), Y3, (-), Y4, (-), Y5, …
246 to 278 H/V
294 to 330 H/V
Vertical Sync
Data arrangement
µ
PD61051, 61052
17