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Main / HD/SD SDI crossconverters / PHDC-7301

PROFLEX™ PHDC-7301 HD/SD SDI crossconverters support all 20 standard aspect ratios including the high and standard definition TV. Any combination of input and output aspect ratio is available for Up-, Down- and Cross-convertion. Output signal may be synchronized to a REF (provided the REF and the output signals' standards are the same). Embedded audio is supported with the "audio delay follows video" capability. Built-in noise reduction unit, apperture corrector and video signal parameters presets (luminance, contast, saturation). Aspect rate conversion or Scalling with the preset and user-configurable (provided by request) modes.

The "4:3<->16:9" cross-convertion supports the following aspect ratios:

• Up-convertion (SD input, HD output):
  • anamorphic:
    

    =>

  • extract:
    

    =>

  • pillarbox:
    

    =>

• Down-convertion (HD input, SD output):
  • anamorphic:
    

    =>

  • extract:
    

    =>

  • letterbox:
    

    =>

The SD<->SD convertion is also possible with the following preset vertical/horizontal scale coefficients (mostly for correcting an input SD weirdly down-converted from HD):

Technical specifications

The list of supported standards:

Presets

The following presets are available:

• output signal delay/advance against the REF within ±850 Ft periods (Ft_HD=74,25MHz, Ft_PAL=27MHz) range on a TV line
• output signal delay/advance against the REF within ±50 TV lines in a TV frame
• noise reduction coefficient 0 to 63 (0 - noise reduction OFF)
• apperture correction coefficient 0 to 255 (0 - apperture correction OFF)

Controls and indicators

PHDC-7301 frontal panel

The MODE button toggles through all the modes, the UP and DOWN buttons edit them. A simultaneous depression of UP/DOWN button resets a parameter to the default value. The FREEZE button enables the frame freeze mode.

The indicators on the frontal panel:

• LOCK INP - lit when a valid SDI input signal is present
• LOCK REF - lit when a REF signal of the supported standard is present and the output SDI signal is locked to it
• FREEZE - lit when the frame freeze mode is enabled
• OUT STD SEL - displays the output signal standard
• TIMING H - displays the output signal's delay/advance to the REF within a TV line
• TIMING V - displays the output signal's delay/advance to the REF within a TV frame
• OUT NR - displays the noise reduction coefficient
• OUT SHARP - displays the apperture correction coefficient
• ASPECT RATIO - displays the aspect ratio convertion parameter

PHDC-7301 simplified schematic:

PHDC-7301 rear panel

The remote control and management from a PC

All the “PROFLEX” modules are remote controllable from a PC. This facility is available if a rack is fitted with a CPU module (ordered separately).