Video signal reproduction processing method and apparatus for reproduction of a recorded video signal as either a sharp still image or a clear moving image

• US 5,473,441 A
• Filed: 06/09/1993
• Issued: 12/05/1995
• Est. Priority Date: 06/12/1992
• Status: Expired due to Term

• Current Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Original Assignee: Fuji Photo Film Co Limited (Fujifilm Holdings Corporation)
• Inventors: Masugane, Kazuyuki, Inuiya, Masafumi
• Primary Examiner(s): Chin, Tommy P.
• Assistant Examiner(s): Truong, Khoi
• Application Number:
  US08/073,474
• Time in Patent Office: 909 Days
• Field of Search: 358/310, 358/312, 358/335, 358/330, 358/906, 358/340, 358/314, 358/328, 358/327, 348/384, 348/606, 348/607, 348/620, 348/700, 348/701, 348/702, 360/33.1, 360/28, 360/29, 360/10.1, 360/8, 360/9.1, 360/10.3
• US Class Current: 386/271
• CPC Class Codes: H04N 1/2112 using still video cameras
• CPC Class Codes: H04N 1/212 Motion video recording combined with still video recording television signal recording H04N5/76
• CPC Class Codes: H04N 2101/00 Still video cameras
• CPC Class Codes: H04N 2201/0082 Image hardcopy reproducer H04N2201/0091 - H04N2201/0094 take precedence
• CPC Class Codes: H04N 5/144 Movement detection for video coding H04N19/503; analysis of motion in general G06T7/20
• CPC Class Codes: H04N 5/765 Interface circuits between an apparatus for recording and another apparatus
• CPC Class Codes: H04N 5/772 the recording apparatus and the television camera being placed in the same enclosure
• CPC Class Codes: H04N 9/79 Processing of colour television signals in connection with recording
• CPC Class Codes: H04N 9/877 by assembling picture element blocks in an intermediate memory
• CPC Class Codes: Y10S 358/906 Hand-held camera with recorder in a single unit

Abstract

Both a sharp print image and a natural reproduced move image can be obtained from a signal recorded on a recording medium. A recording signal, read from the recording medium, is converted into digital data and is delayed by one field. Data representing the current image in the n-th field and data representing an image in the (n-1)-th field one field ahead of the current image, are applied to a subtracting circuit, to extract a component representing moving image portions. An interpolated image for making movement correction is created from the extracted component representing the moving image portions by an interpolating circuit. Data representing the interpolated image and the data representing the current image in the n-th field are synthesized by a synthesizing circuit, to output composite data as data representing an image which has been subjected to movement correction. Since the image is subjected to the movement correction, a natural reproduced movie image smoothly moving is obtained even when the recording signal is recorded at high shutter speed.

Claims

1. A video signal reproduction processing method comprising the steps of:

reading, from a recording medium on which a modulated movie video signal representing an image of a subject picked up at a shutter speed faster than 1/60 of a second is recorded, a video signal;

subjecting the read video signal to reproduction processing including demodulation, to obtain a first video signal;

extracting, on the basis of the first video signal representing a current image frame and a video signal representing a preceding image one frame ahead of said current image frame, a difference signal representing moving image portions;

generating a signal representing an interpolated image based upon an interpolation of the extracted difference signal representing the moving image portions; and

synthesizing said first video signal representing the current image frame and said generated signal representing the interpolated image, to obtain a second video signal to thereby provide for reproduction of the recorded video signal as both a sharp still image and a clear moving image.

2. The video signal reproduction processing method according to claim 1, wherein said step of extraction of the difference signal representing the moving image portions, said step of generation of the signal representing the interpolated image, and said step of synthesizing are performed with respect to a luminance signal component of the video signal.

3. The video signal reproduction processing method according to claim 1, wherein said step of extraction of the signal representing the moving image portions, said step of generation of the signal representing the interpolated image, and said step of synthesizing are performed with respect to each of a luminance signal component and a chrominance signal component of the video signal.

4. The video signal reproduction processing method according to claim 1, wherein said first video signal is selected and outputted as one of a print image output, a slow-motion output and a still image output, and said second video signal is selected and outputted as a movie image output.

5. The video signal reproduction processing method of claim 1, wherein the shutter speed is 1/120 of a second.

6. A video signal reproduction processing apparatus comprising:

reading means for reading, from a recording medium on which a modulated movie video signal representing an image of a subject picked up at a shutter speed greater than 1/60 of a second is recorded, a video signal;

reproduction processing means for subjecting the video signal read by said reading means to reproduction processing including demodulation, to obtain a first video signal;

extracting means for extracting, on the basis of the first video signal representing a current image frame and a video signal representing a preceding image one frame ahead of said current image frame, a difference signal representing moving image portions;

interpolated image creating means for generating a signal representing an interpolated image based upon an interpolation of the extracted difference signal representing the moving image portions, extracted by said extracting means; and

synthesizing means for synthesizing said first video signal representing the current image frame and said generated signal representing the interpolated image, to obtain a second video signal to thereby provide for reproduction of the recorded video signal as both a sharp still image and a clear moving image.

7. The video signal reproduction processing apparatus according to claim 6, wherein said extraction of the difference signal by the extracting means, said generation of the signal representing the interpolated image by the interpolated image creating means, and said synthesizing by the synthesizing means are performed with respect to a luminance signal component of the video signal.

8. The video signal reproduction processing apparatus according to claim 6, wherein said extraction of the difference signal by the extracting means, said generation of the signal representing the interpolated image by the interpolated image creating means, and said synthesizing by the synthesizing means are performed with respect to each of a luminance signal component and a chrominance signal component of the video signal.

9. The video signal reproduction processing apparatus according to claim 6, further comprising switching means for switching between said first video signal and said second video signal, said first video signal being selected and outputted as one of a print image output, a slow-motion output and a still image output, and said second video signal being selected and outputted as a movie image output.

10. The video signal reproduction processing apparatus of claim 6, wherein the shutter speed is 1/120 of a second.