JP2006246281A - Video signal processing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small-sized, inexpensive video signal recording and display apparatus which realizes different flame rate, when recording and displaying. <P>SOLUTION: The video signal recording and display apparatus has N (a natural number) pieces of video input means for inputting N pieces of moving pictures, a storage means that can store N pieces of the video signals, N pieces of write means for writing N pieces of video signals transmitted from N pieces of the input means into the storage means, and a first read means for selectively reading video signals written in the storage means. In addition, the apparatus also has a display conversion means for converting moving pictures, transmitted from the first read means into video signals that can be displayed on a monitor to output them, a second read means for selectively reading video signals written in the storage means, and a recording means for recording signals transmitted from the second read means into a recording medium. The input means and write means are shared in the recording and display systems. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a video signal processing apparatus, for example, a video signal recording and display apparatus for displaying and recording a video signal.

  As background art in this technical field, for example, there is JP-A-2000-232640 (Patent Document 1). The gazette has a problem as follows: “When switching images from a plurality of cameras or the like sequentially, the switching images are dedicated for recording devices and monitor screens, and each output can be set independently for switching. The switching device d is provided as a recording means, and the switching signals d and e obtained by the switching means 2A and 2B can be output as the recording video signal j and the monitor video signal k. Can be set with a short switching time by the setting means 4A, satisfies the requirement of a short recording interval, which is a requirement of the video recording apparatus, and visually checks the monitor video signal k on a monitor screen or the like. The setting means 4B can set the switching interval suitable for human visual tracking confirmation, so that the recording video signal j and the monitor video signal k can be set to ideal video switching. It has been described as possible. "It is.

JP 2000-232640 A

  In a device that simultaneously records and displays a plurality of video signals, such as a monitoring device, a different frame rate (number of frames per second) and screen size are required for each video or for recording and display. . In recent years, the number of input video signals has increased, and recording and display at a higher frame rate are required.

  Patent Document 1 discloses an apparatus that receives a plurality of video signals as input and simultaneously performs recording and display. The apparatus described in Patent Literature 1 includes independent video switching means for recording and display. This video switching means includes switching means for switching and outputting a plurality of videos. When the plurality of video signals are asynchronous with each other, each video signal input is once written in a memory or the like, and the single video signal input A so-called frame synchronizer function that reads in synchronization with the synchronization signal is required. In an apparatus provided with video switching means independently for recording and display, two frame synchronizer means are required, increasing the scale and cost of the apparatus.

  Accordingly, an object of the present invention is to reduce the scale and cost of a video signal processing apparatus that realizes different frame rates for recording and display.

  The above object can be achieved by the invention described in the claims.

  According to the present invention, the scale and cost of the apparatus can be reduced.

  A first embodiment of the present invention will be described with reference to FIG.

  In FIG. 1, 101, 102, and 103 are video input units, 104, 105, and 106 are writing means, 107 is a memory control means, 108 is a memory, 109 is a first reading means, 110 is a display processing means, and 111 is an output. A terminal 112, a monitor unit 113, a second reading unit 113, a recording processing unit 114, a recording medium 115, and a video switching unit 116.

When the input video signal is an analog signal subjected to frequency modulation, the input video signal is converted into a digital signal by the video input units 101, 102, and 103 and demodulated. The writing means 104, 105, 106 writes the video signal from the video input units 104, 105, 106 to the memory 108 via the memory control means 108. The first reading unit 109 selectively reads out the video to be displayed on the monitor 112 from the memory 108 via the memory control unit 108. The display processing unit 110 receives the video signal read by the first reading unit 109, performs processing such as configuring a multi-divided display screen, and converts it into a displayable video signal to which a synchronization signal is added. Output to the output terminal 111. The monitor unit 112 displays the video signal from the output terminal 111.
On the other hand, the second reading means 113 selectively reads out the video to be recorded on the recording medium 115 from the memory 108 via the memory control means 108. The recording processing unit 114 converts the video signal read by the second reading unit 113 into a recordable signal and records it on the recording medium 115.
The user sets respective frame rates for the video displayed on the monitor 112 and the video recorded on the recording medium 115 by a system control unit (not shown). The first reading means 109 and the second reading means 113 read the video necessary for display and recording from the memory 108 in accordance with the frame rate set by the user, thereby displaying and recording frame rates set by the user. Is realized.

  As described above, according to the first embodiment, the user can display the input video signal on the monitor 112 and record it on the recording medium 115, and can set different frame rates for recording and display. Usability is improved. Further, since the video signal written in the memory 108 can be used for both the display system and the recording system, the video input units 101, 102, 103 and the writing means 104, 105, 106 are provided for each input video signal. What is necessary is just to be able to reduce the scale and cost of the apparatus as compared with an apparatus having independent video switching means for the display system and the recording system.

Next, a second embodiment of the present invention will be described with reference to FIG.
In FIG. 2, 117 is a first video reduction means, and 118 is a second video reduction means. Other components are the same as those in FIG. 1, and are denoted by the same reference numerals.
The user sets the screen sizes of the video to be displayed on the monitor 112 and the video to be recorded on the recording medium 115 by a system control unit (not shown). The first video reduction unit 117 receives the video signal read by the first reading unit 109, reduces the video signal according to the display screen size set by the user, and outputs the video signal to the display processing unit 110. The first video reduction unit 118 receives the video signal read by the second reading unit 113, reduces the video signal according to the recording screen size set by the user, and outputs the video signal to the recording processing unit 110.

  As described above, according to the second embodiment, the user can display the input video signal on the monitor 112 and record it on the recording medium 115, and can set different frame rates for recording and display, In addition, since different screen sizes can be set for recording and display, usability is improved. Further, since the video signal written in the memory 108 can be used for both the display system and the recording system, the video input units 101, 102, 103 and the writing means 104, 105, 106 are provided for each input video signal. What is necessary is just to be able to reduce the scale and cost of the apparatus as compared with an apparatus having independent video switching means for the display system and the recording system.

The block block diagram of the apparatus in the 1st Embodiment of this invention. The block block diagram of the apparatus in the 2nd Embodiment of this invention.

Explanation of symbols

101, 102, 103 Video input unit 104, 105, 106 Writing unit 107 Memory control unit 108 Memory 109 First reading unit 110 Display processing unit 111 Output terminal 112 Monitor unit 113 Second reading unit 114 Recording processing unit 115 Recording medium 116 Video switching means 117 First video reduction means 118 Second video reduction means

Claims (2)

N video input means for inputting N (N is a natural number) video;
Storage means capable of storing the N video signals;
N writing means for writing N video signals from the N input means to the storage means;
First reading means for selectively reading a video signal written in the storage means;
Display conversion means for converting the video from the first reading means into video signals that can be displayed on a monitor and outputting the video signals;
Second reading means for selectively reading a video signal written in the storage means;
A video signal processing apparatus comprising: recording means for recording a signal from the second reading means on a recording medium. In claim 1,
2. A video signal processing apparatus according to claim 1, wherein reading of the video signal by the first reading unit and reading of the video signal by the second reading unit have different frame rates.

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