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ROHM Semiconductor ML86V7675 Digital Video Decoder LSI

ROHM Semiconductor ML86V7675 Digital Video Decoder LSI converts NTSC, PAL analog video signals, 480i/576i/480p/576p analog video signals, analog EGA (400 x 234, 480 x 234), analog RGB WVGA (800 x 480) signals into the YCbCr standard digital format defined by ITU-R recommendations BT.601/BT.656. The device has built-in 10-bit A/D converters and can accept only composite video signal, S-video signal, or Component video signal as an analog input.

An input composite video signal is separated into luminance and chrominance signals with a 2-dimensional Y/C separation filter. These two signals are then output as digital video signals. In addition to the asynchronous sampling method, a unique feature of ROHM (Lapis) Semiconductor’s video decoders is that video signals can be sampled using a line lock clock sampling method using the built-in PLL. Further, the pixel position compensation function provided makes it possible to eliminate video jitter even with the asynchronous sampling method, ensuring the output of jitter-free video data.

Features

  • Analog video input (input format)
    • Composite video: NTSC/PAL/SECAM (ITU-R BT.470)
    • S video: NTSC/PAL/SECAM (ITU-R BT.470)
    • Component video input (YPbPr/RGB) comes in 480i/576i/480p/576p, EGA, WVGA (Sync on Y/G. CSYNC input supported only at RGB input)
  • The analog input port
    • Composite video input 4-ch
    • Component video input (YPbPr/RGB) is 1-ch
    • Component video input (YPbPr/RGB) or S video input 1-ch
  • 10-bit A/D converter
  • Supported sampling frequency
    • NTSC/ PAL/ SECAM (ITU-R BT.601) is 27.0000MHz
    • NTSC is 28.6363MHz
    • D1 (480i/576i) is 27.0000MHz
    • D2 (480p/576p) is 27.0000MHz
    • EGA (400×234) is 7.993006MHz
    • EGA (480×234) is 9.582167MHz
    • WVGA (800×480) is 33.231 or 33.333MHz
  • Asynchronous sampling method with line lock clock sampling method
  • Y/C separation is an adaptive two-dimensional Y/C separation filter
  • Luminance level adjustment is an AGC (automatic luminance adjustment), MGC (manual luminance adjustment), or peak AGC
  • Color level adjustment is ACC (automatic color adjustment) or MCC (manual color adjustment)
  • Contrast adjustment is adjustable around 128 with a slope ranging from 1/32 to 63/32
  • Luminance offset adjustment is adjustable between -7IRE to 7IRE (except analog RGB inputs), -128LSB to 127LSB
  • Contour correction emphasizes the higher frequencies
  • Hue adjustment is adjustable between -178.6° to 180°(NTSC,PAL only), -45° to 44.6°
  • Automatic judgment of input video signal method can be done with NTSC/PAL/SECAM automatic recognition
  • VBI data detection
    • Closed caption supports only NTSC (480i)
    • CGMS supports only NTSC (480i, 480p)
    • WSS supports only PAL (576i)
  • Output format
    • YCbCr 4:2:2 (8-bit duplex data + sync signal), ITU-R BT.656 (YCbCr 4:2:2 8-bit multiplexed data including synchronization information)
    • SDR, DDR output selectable
  • The host interface is I2C (slave) with the slave address selectable from 80h (1000_000x) or 82h (1000_001x)
  • Clock
    • Sampling clock
    • Line lock PLL method
    • An external crystal oscillator (32.00MHz or 25.00MHz) is attached as a reference clock
  • Power supply voltage
    • I/O is 3.3V ±0.3V
    • The analog section (AFE/ADC) is 3.3V ±0.3V
    • The analog section (PLL) is 1.5V ±0.15V
    • The logic section is 1.5V ±0.15V
  • The operating frequency is a maximum input of 28.63MHz and a maximum output of 57.26MHz
  • -40°C to +85°C operating temperature (ambient temperature)
  • 64-pin plastic TQFP package

Applications

  • Car navigation
  • Display audio
  • RSE (Rear Seat Entertainment)

Block Diagram

Block Diagram - ROHM Semiconductor ML86V7675 Digital Video Decoder LSI
Published: 2024-11-26 | Updated: 2024-12-05