ml86v7667 Oki Semiconductor, ml86v7667 Datasheet - Page 9

• Manufacturer Part Number: ml86v7667
• Description: Ntsc/pal Digital Video Decoder
• Manufacturer: Oki Semiconductor

Digital Section
2-dimensional Y/C Separ ation Block
OKI Semiconductor
A/D converter
Decimation filter
2-Dimensional Y/C Separation Function
Special Broadcasting Standard Decode Function
MRB[5:3]
This 10-bit A/D converter (ADC) converts analog video signals to digital video data. There is 1 channel built
into the ADC. Sampling is performed at the pixel frequency or double-speed.
# Related registers: $1E/ADC1, $1F/ADC2
The digital section separates the video data digitized by the ADC into Y and C data, converts these data to
various data formats and outputs them. The digital section also performs output level adjustment, image quality
adjustment and various corrections.
This filter is applied during double speed sampling mode.
Since internal processing is performed at a single speed even during the double speed sampling mode, this filter
is needed to reduce the data that has been doubled by one-half. Using the decimation filter after double-speed
sampling reduces high-frequency noise and provides data having better high frequency characteristics.
# Related register: $02/MRC[4]
This block separates composite data into Y (luminance) data and C (chrominance) data. The Y/C separation
function works only for lines which are active as image data and is bypassed for composite signals in the V
blanking period.
With the Y/C separation filter, composite data is separated into Y (luminance) data and C (chrominance) data.
There are various Y/C separation filters available, which can be selected in an internal register.
# Related register: $01/MRB
Signals of the following special standards other than normal NTSC/PAL signals can be decoded.
# Related register $00/MRA[2:1]
MRA[2:1] = "00" Normal mode
MRA[2:1] = "01" NTSC443
MRA[2:1] = "10" PAL M, N
MRA[2:1] = "11" Setting prohibited
*000
001
010
011
100
101
110
111
2-line/3-line adaptive transition filter
3-line comb/trap adaptive filter 2
2-line/3-line adaptive comb filter
3-line comb/trap adaptive filter
NTSC Y/C separation
3-line comb filter
Undefined
Undefined
Trap filter
2-line comb/trap adaptive transition filter
PAL Y/C separation
2-line comb filter
Undefined
Undefined
Undefined
Undefined
Undefined
Trap filter
PEDL86V7667-00
ML86V7667
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