ml86v7667 Oki Semiconductor, ml86v7667 Datasheet - Page 10

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

Luminance Block
The luminance block removes sync signals from the luminance data after Y/C separation, and performs
adjustments such as luminance level adjustment and luminance image quality correction and adjustment. The
digital decoded data that is output conforms with ITU-R BT.601.
OKI Semiconductor
Pixel Position Correction Function
Digital AGC Function
Image Quality Adjustment
This function corrects sampling error in asynchronous sampling and loss of PLL synchronization. Error
correction is made in the horizontal direction, which improves vertical line jitter on the screen.
# Related register: $02/MRC[6]
This function adjusts the output level of luminance signals. Adjustment is automatically performed by the
digital AGC, but the adjustment can also be set manually by using an internal register to set digital MGC. In the
digital AGC mode, the sync level is compared with a reference value to determine the amplification rate of the
luminance level. The default is automatically adjusted to sync level 40IRE, but the level can also be adjusted in
an internal register. In the digital MGC mode, the signal amplification rate and the black level are adjusted with
register settings. The black level is adjusted by means of pedestal level adjustment (register $11/SSEPL[7] =
“1”).
Regarding the AGC function, in addition to the output level adjust function in the digital section, the input level
adjust function of the AMP in the analog section also operate separately.
# Related registers: $0D/AGCLA, $0E/AGCLB, $0F/AGCRC, $11/SSEPL, $10/CLC
The following image filters are provided for adjusting luminance image quality.
Refer to the User's Manual for the characteristics of each filter.
Edge emphasizing pre-filter
Filter for emphasizing edges of luminance component signals.
The pre-filter and the sharp filter operate simultaneously.
# Related register $OC/LUMC[7]
Aper tur e bandpass filter, cor ing filter for contour compensation, and luminance pr e-filter
Adjustment is performed by combining the following registers.
Aperture bandpass filter coefficient setting:
# Related register $OC/LUMC[6:5]
Coring range setting:
# Related register $OC/LUMC[4:3]
Aperture weighting factor setting:
# Related register $OC/LUMC[2:0]
Note: AGC (Auto Gain Control), MGC (Manual Gain Control)
PEDL86V7667-00
ML86V7667
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