Television camera
A first video signal having a first frame rate optionally settable is generated by an image pickup device, and the first video signal is memorized in a memory and outputted from the memory. A write control device controls the write of the first video signal with respect to the memory, and a read control device controls the read of the video signal with respect to the memory. The write control device writes respective first frame data constituting the first video signal in the memory in each cycle determined by the first frame rate of the first video signal. The read control device reads the first frame data as a second video signal. The second video signal is formed from sequentially arranging the first frame data in a partially duplicating manner in a standard video signal having a standard frame rate based on a determined arrangement rule. The predetermined arrangement rule is an arrangement rule employed when respective frame data constituting a video signal having a second frame rate equal to or lower than the standard frame rate are arranged in a duplicating manner in the standard video signal. In the foregoing manner, an time elongation/contraction effect on an image can be speedily and inexpensively obtained.
1. A television camera comprising:
an image pickup device for generating a first video signal having a first frame rate optionally settable;
a memory device for temporarily memorizing the first video signal outputted from the image pickup device;
a write control device for controlling an operation of writing the first video signal with respect to the memory device; and
a read control device for controlling an operation of reading the video signal memorized in the memory device, wherein
the write control device controls an operation of writing respective first frame data constituting the first video signal in the memory device in each time cycle determined by the first frame rate,
the read control device controls an operation of reading the first frame data memorized in the memory device as a second video signal,
the second video signal has a signal mode in which the respective first frame data are sequentially arranged in a partially duplicating manner in a standard video signal having a standard frame rate determined by an output standard format of the television camera based on a predetermined arrangement rule, and
the predetermined arrangement rule is an arrangement rule employed when respective frame data constituting a video signal having a second frame rate equal to or lower than the standard frame rate (standard frame rate≧second frame rate) are arranged in a duplicating manner in the standard video signal in such manner that they correspond to one another in terms of real time on an image.
2. A television camera as claimed in claim 1 , wherein
the first video signal generated by the image pickup device includes a video signal generated in a temporally at-random intermittent imaging.
3. A television camera as claimed in claim 1 , further comprising a recorder for recording the second video signal on a recording medium.
4. A television camera as claimed in claim 1 , further comprising a display device for converting the second video signal outputted from the memory device into a display image and displaying the display image.
5. A television camera as claimed in claim 1 , further comprising:
a converting device for converting the first video signal into the standard video signal having the standard frame rate determined by the output standard format of the television camera;
a selecting device for selecting from the second video signal outputted from the memory device and the standard video signal outputted from the converting device; and
a display device for converting an output of the selecting device into a display image and displaying the display image.