Video Signals And Timing: Difference between revisions
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→GTF Using resolution and refresh rate: Substituted in the horizontal total |
→Variable reference: Added missing variables for the first GTF formula |
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:'''Todo''' Equals 550
{{Anchor|V_SYNC_RND}}
'''V_SYNC_RND'''
:The amount of scanlines with the vertical synchronisation pulse active. '''Todo''' Seems to depend on something VESA doesn't tell you. Equals 2.
=== Video mode inputs ===
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=== Outputs ===
{{Anchor|PIXEL_FREQ}}
'''PIXEL_FREQ'''
:The dot clock required (check units?)
{{Anchor|TOP_MARGIN_LINES}}
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:Amount of pixels in a scanline
{{Anchor|TOTAL_V_LINES}}
'''TOTAL_V_LINES'''
:The amount of scanlines in a frame
{{Anchor|V_BACK_PORCH}}
'''V_BACK_PORCH'''
:The amount of scanlines between the Vertical Sync pulse and the start of the next frame
=== Intermediates ===
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{{Anchor|INTERLACE}}
'''INTERLACE'''
:Interlaced modes are indicated by skipping half a scanline, so that the horizontal sync shifts half a period. Equals 0 or 0.5 depending on whether the interlace signal is included.
{{Anchor|V_SYNC_AND_BACK_PORCH}}
'''V_SYNC_AND_BACK_PORCH'''
:The number of scanlines spent on VSync and bottom blanking
{{Anchor|V_FIELD_RATE_ESTIMATE}}
'''V_FIELD_RATE_ESTIMATE'''
:The initial estimate of fields per second (check unit?)
{{Anchor|V_FIELD_RATE}}
'''V_FIELD_RATE'''
:The number of fields per second (check unit?)
{{Anchor|V_FRAME_RATE}}
'''V_FRAME_RATE'''
:The number of frames per second (check unit?)
{{Anchor|TOTAL_ACTIVE_PIXELS}}
'''TOTAL_ACTIVE_PIXELS'''
:The amount of horizontally visible pixels, which equals the active display plus overscan
{{Anchor|IDEAL_DUTY_CYCLE}}
'''IDEAL_DUTY_CYCLE'''
:'''Todo''' Percentage. One of the steps to compute the amount of horizontal blanking
{{Anchor|H_BLANK_PIXELS}}
'''H_BLANK_PIXELS'''
:The total amount of blank pixels horizontally (including horizontal sync)
= Brendan's Original Posts =
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