System for readying host device to transfer data to recording device in response to gating signal sent from recording device
AssigneeSeiko Instruments Inc.
InventorKenichi Matsushima
Life of this patent
Estimating the term…
Abstract
A system for transferring and recording image data. A host device outputs a video signal representative of image data and a request signal effective to request recording of the image data. A recording device is responsive to the request signal to return to the host device a gating signal defining a preceding preparation interval and a succeeding transfer interval and effective to enable the host device to complete preparation of transfer of the image data within the preceding preparation interval and to carry out the transfer of the image data during the succeeding transfer interval from the host device to the recording device so that the recording device records the image data.
Claims23
A system for transferring and recording image data, comprising:
- a host device for repeatedly outputting at a certain rate a video signal representative of image data to a cathode-ray tube for display of the image data by the cathode-ray tube and for outputting a request signal effective to request recording of the image data represented by the video signal being repeatedly outputted;
- and
- a recording device responsive to the request signal to return to the host device a gating signal effective to change over coupling between the video signal and the cathode-ray tube to coupling between the video signal and the recording device or to change over coupling between the video signal and the recording device to coupling between the video signal and the cathode-ray tube, the gating signal defining a preceding preparation interval and a succeeding transfer interval, the recording device having means to enable the host device to complete preparation of transfer of the image data and to change over the coupling within the preceding preparation interval and to enable the host device to carry out the transfer of the video signal during the succeeding transfer interval from the host device to the recording device so that the recording device records the image data.
A system for transferring and recording image data, comprising:
- a host device having means for repeatedly producing at a prescribed repetition rate a video signal representative of image data and for applying the video signal to a cathode-ray tube for display of the image data by the cathode-ray tube, means for producing a request signal to request recording of the image data represented by the video signal being repeatedly produced, and means responsive to a gating signal for completing preparation for transfer of the image data, the preparation including holding preselected image data to be recorded;
- and a recording device connectable to the host device and having means responsive to the request signal for producing a gating signal and applying the gating signal to the host device, the gating signal having a given duration defining a predetermined preparation interval followed by a transfer interval, the preparation interval being sufficient to enable the host device to complete preparation of the transfer of the image data and the transfer interval being sufficient to enable the host device to carry out the transfer of the image data to the recording device, and recording means responsive to the video signal for recording the transferred preselected image data in the form of a hard copy.
A system for transferring and recording image data, comprising:
- a host device comprising a cathode-ray tube, means for repeatedly outputting at a repeat rate of 50 to 60 times per second a video signal representative of image data to the cathode-ray tube for display, and means for outputting a request signal for requesting recording of the video signal being repeatedly outputted to the cathode-ray tube;
- and a recording device for providing a gating signal to the host device in response to the request signal, the gating signal being returned prior to the start of transfer of the video signal from the host device to the recording device and including a preparation interval during which the host device completes preparation of the video signal for transfer to the recording device and a data transmission interval during which the video signal is transferred to the recording device so that the video signal is alternately received by the cathode-ray tube and the recording device in response to the gating signal.
Dependencies are inferred from the claim text.