Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Reexamination Certificate
1996-11-18
2001-01-09
Nguyen, Huy (Department: 2715)
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
C386S349000, C386S349000
Reexamination Certificate
active
06173108
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to an image signal recording apparatus for recording an image signal on a recording medium.
2. Description of the Prior Art
The known recording and/or reproducing apparatuses for recording or reproducing a video signal obtained by image sensing means, such as a video camera, on or from a recording medium such as a magnetic disc include an apparatus called an electronic still video camera.
The currently known electronic still video camera is capable of recording or reproducing only a TV signal which is in conformity to the currently prevalent TV system, such as the NTSC system. In the case of the TV signal conforming to the NTSC system, the still video camera is arranged to have 525 scanning lines per frame and about 350 TV horizontal resolution.
However, recent improvement in the picture quality of the video tape recorder has come to stimulate a strong desire for improvement in the picture quality of the electronic still video camera. Since the electronic still video camera is for recording and reproducing still images, the currently attainable resolution is hardly satisfactory. Further, the quality of a picture printed with a video signal reproduced from the magnetic disc is much inferior to that of a picture taken by a camera of the silver-halide type.
Further, a novel TV system of a high picture quality called a high-definition TV system has lately been proposed and is now under experiments. For any electronic still video camera that is capable of matching with this new TV system, the currently prevalent recording and reproduction format is hardly usable as it is for recording and reproduction. Besides, another problem resides in that, even if any new format is developed to enable the still video camera to match with the new TV system, it would be difficult to have interchangeability between the still video cameras adapted for the new and old formats.
For recording, on a recording medium such as a magnetic disc or the like, a still image signal adapted for the above-stated TV system of a high picture quality, it is conceivable to perform multi-channel recording by simultaneously using a plurality of magnetic heads for a plurality of channels. This method, however, encounters a cross-talk problem arising between the magnetic heads if these heads are narrowly spaced for the purpose of increasing the recording capacity of the magnetic medium.
SUMMARY OF THE INVENTION
It is a general object of the invention to solve the above-stated problems of the prior art.
It is a more specific object of the invention to provide an image signal recording apparatus which is capable of recording an image signal of a high picture quality with a high density on a recording medium.
Under this object, an image signal recording apparatus arranged, according to the invention in one mode of embodiment thereof, to record, on a recording medium, image signals corresponding to an image in which one picture is composed of a plurality of horizontal scanning lines comprises:
image signal output means for storing the image signals for one picture and simultaneously outputting N kinds of image signals corresponding respectively to N number of horizontal scanning lines which are adjacent to each other on the picture, N being an integer not less than 2; and
recording means for simultaneously recording the N kinds of image signals output from the image signal output means in different areas on the recording medium.
It is another object of the invention to provide an image signal recording apparatus which is capable of recording on a recording medium an image signal of a high band without deteriorating the image signal.
Under that object, an image signal recording apparatus arranged, according to the invention in one mode of embodiment thereof, to record image signals on a recording medium comprises:
image sensing means for sensing an image of an object to be photographed, forming image signals corresponding to the object image, and simultaneously outputting a first image signal corresponding to a first part of the object image and a second image signal corresponding to a second part of the object image which is different from the first part; and
recording means for simultaneously recording in different areas on the recording medium the first and second image signals which are simultaneously output from the image sensing means.
The above and other objects and features of the invention will become apparent from the following detailed description of embodiments thereof taken in connection with the accompanying drawings.
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William J. Hawkins, 3-D Camcorder, Jan. 1988, Popular Science, 56.*
Canon Kabushiki Kaisha
Nguyen Huy
Robin Blecker & Daley
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