NI 5431 Composite Video Generator
VDG_Get_YC_I16_Line
This advanced VI calculates the data for the Y (Luma) and C (Chroma) components for the specified video line. The output data are signed 16-bit (I16) values, and the scaling follows the function:
Output signal = Gain x DataIRE + Offset
DataIRE = value of the data in IRE Gain = value of the attribute Output Gain (Default = 250) Offset = value of the attribute Output Offset (Default = –4000)
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Line number specifies the number for the video line to be calculated. |
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error in is a cluster that describes the error status before this VI executes. If error in indicates that an error occurred before this VI was called, this VI may choose not to execute its function, but just pass the error through to its error out cluster. If no error has occurred, then this VI executes normally and sets its own corresponding error message. Using error in and error out clusters is a convenient way to check errors and to specify execution order by wiring the error output from one subVI to the error input of the next. |
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Y signal returns the calculated I16 composite luma (including the composite synchronization signal) data for the specified line. |
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C signal returns the calculated I16 chroma (including color burst) data for the specified line. |
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error out is a cluster that describes the error status after this VI executes. If an error occurred before this VI was called, error out is the same as error in. Otherwise, error out shows the error, if any, that occurred in this VI. Use the error handler VIs to look up the error code and to display the corresponding error message. Using error in and error out clusters is a convenient way to check errors and to specify execution order by wiring the error output from one subVI to the error input of the next. |