JPH0297182A - Picture signal processor - Google Patents

Abstract

PURPOSE:To execute the still reproducing of a desired picture by discriminating an identifying signal to identify a frame picture which is overlapped in advance, storing the frame picture to a memory circuit when a number to show the desired frame picture is discriminated and continuously outputting the picture. CONSTITUTION:A picture signal 11 is composed of still pictures, which are different in each frame, and the identification number signal is overlapped to respective frame picture signals in order to identify what the picture is. The picture signal 11 is inputted to an identification number discriminating circuit 2 and a memory circuit 5. In the identification number discriminating circuit 2, the identification number to be overlapped to the picture signal 11 is discriminated and an identification number 21 is outputted. In a coincidence deciding circuit 4, the discrimination number 21 and a picture signal 31 are compared. Then, only when coincidence is shown, the signal to be stored in the memory circuit is replaced with the desired frame picture signal of the picture signal 11 and the desired frame picture signal is repeatedly outputted from the memory circuit.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is a method for quickly reproducing a desired frame image from an image signal consisting of still images that are different for each frame recorded by a video tape recorder (VTR) or the like. The present invention relates to an image signal processing device for processing.

Conventional technology home VTR cueing methods include a counter memory method that uses tape counter values to cue, a method that inputs a cue signal into the control track (VISS), and a method that inputs an absolute address (VASS). be.

Problems to be Solved by the Invention However, even if the VISS-VASS method is used, 20
A cueing error of ~30 frames will occur, and an even larger error will occur if the counter memory method is used. Therefore, an image signal consisting of a different still image for each frame is recorded on a home VTR, and the desired frame image is recorded. It is extremely time-consuming and difficult to reproduce still images. In addition, by recording the same still image for several seconds (about 100 frames), VISS-VASS can easily cue the desired image and play back the still image using a home VTR, reducing tape consumption by an order of magnitude. In view of the above-mentioned problems, the present invention enables quick still playback of a desired image when an image signal consisting of different still images for each frame is recorded and played back on a home VTR. The present invention provides an image signal processing device.

Means for Solving the Problems In order to solve the above problems, the image signal processing device of the present invention consists of still images different for each frame, and an identification number signal for identifying the image is superimposed on each frame. an identification number discriminating circuit that receives as input an image signal and discriminates an identification number; a match determining circuit that determines whether or not the identification number output from the identification number discriminating circuit matches a predetermined number; and a memory circuit which receives the output signal of the determination circuit and the image signal as input, and rewrites the stored signal to the image signal only when the output signal of the coincidence determination circuit indicates a match. .

Effect of the Invention With the above-described configuration, the present invention determines an identification signal for identifying a frame image that is superimposed in advance on an image signal consisting of a different still image for each frame, and determines a number indicating a desired frame image. At the same time, by storing the frame images in a memory circuit and outputting them continuously, still reproduction of the desired image is performed.

Embodiment Hereinafter, an image signal processing device according to an embodiment of the present invention will be described.
This will be explained with reference to the drawings.

FIG. 1 is a block diagram showing the main part configuration of an image signal processing device in an embodiment of the present invention. Input terminal 1 has
An image signal 11 output from a VTR is input. This image signal 11 consists of a different still image for each frame, and each frame image signal is superimposed with an identification number signal for identifying the image. The identification number signal may be superimposed immediately before being recorded on the VTR, or may be superimposed before being transmitted as a broadcast signal.

FIG. 2 shows a row of image signals on which identification number signals are superimposed. FIG. 2 shows the waveform of the image signals in the vertical retrace section. The identification number signal 7 is superimposed between the horizontal synchronizing pulses without the video signal 8 in the vertical retrace section, and even if the identification number signal 7 is present in this portion, the video signal 8 is not affected at all.

The image signal 11 is input manually to the identification number discrimination circuit 2 and the memory circuit 5. In the identification number discrimination circuit 2, the image signal 11
The identification number superimposed on the image is determined and the identification number 21 is output. The identification number 21 is input to the match determination circuit 4. In the match judgment circuit 4, the discrimination number 21, the desired image number 31
A match determination circuit 41 outputs a result indicating whether the two numbers match or not. The match determination signal 41 is input to the memory circuit, and only when it indicates a match, the signal stored in the memory circuit is replaced with the desired frame image signal of the image signal 11, and the desired frame image signal is repeatedly output from the memory circuit. be done.

Furthermore, when playing back a VTR, if the VISS-VASS, which does not have very high precision cueing, is used to play back a little before the desired image, the desired still frame image can be viewed in a short time.

Effects of the Invention As described above, according to the present invention, an identification number discriminating circuit that receives as input an image signal on which an identification number signal reproduced by a VTR or the like is superimposed can detect whether the identified number matches the desired image number. -t
When you do so, it memorizes the image signal input at that time,
By providing a memory circuit that continuously outputs stored frame images until they are subsequently rewritten,
It is possible to configure an image signal processing device that can quickly reproduce still images of desired frame images.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an image signal processing device according to an embodiment of the present invention, and FIG. 2 is a schematic diagram showing an example of an image signal on which an identification number signal is superimposed, which is input to the image signal processing device of the present invention. It is. 11...Image signal with superimposed identification number signal, 2
....Identification number discrimination circuit, 4 ....Concordance judgment circuit, 5 ....Memory circuit, 7 ....Identification number signal, 8 .... video signal.

Claims (1)

[Claims] an identification number discrimination circuit that receives as input an image signal consisting of a different still image for each frame and on which an identification number signal for identifying the image is superimposed for each frame and discriminates the identification signal; a match determination circuit that determines whether an output identification number and a predetermined number match; an output signal of the match determination circuit and the image signal are input; and an output signal of the match determination circuit indicates a match; 1. An image signal processing device comprising: a memory circuit in which a stored signal is rewritten to the image signal only when the image signal is displayed.