System for transferring pixel data from a digitizer to a host me

Details System for transferring pixel data from a digitizer to a host me System for transferring pixel data from a digitizer to a host me

1997-04-14

1999-08-24

Lee, Thomas C.

G06F 1314

Patent

active

059435046

ABSTRACT:
One aspect of the invention relates to a method for synchronizing control signals with scaled digital video data. In one version of the invention, the method includes the steps of transferring digitized video data from a digitizer to a video scaler which stores the digitized video data to form pixel data and generates a pixel qualifier signal to indicate when pixel data is valid; storing the pixel data into a field memory in response to the pixel qualifier signal from the video scaler; storing control signal data in a control memory in response to the pixel qualifier signal, the control signal data being representative of control signals provided by the video scaler, such that a correspondence is created between the pixel data stored in the field memory and the control signal data stored in the control memory; and transferring the pixel data stored in the field memory and the control signal data stored in the control memory to a bus interface unit, the bus interface unit being coupled to a data bus of a host processor, such that the correspondence between the pixel data and the control signal data is maintained during the transfer.

REFERENCES:
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IBM TDB, Optimzation of Storage Capacity on Storage Devices Supporting Variable Length Records with Fixed Block Length Medium Constraints, IBM TDB vol. 36 No. 03, pp. 255-258, Mar. 3, 1993.
IBM TDB, Variable Line Length for Alphanumeric CRT Display, IBM TDB o7-78 pp. 783-784, Apr. 1993.

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