JP2003087655A - Video signal switching device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a video signal switching device which enables tasteful reproduction of video pictures. SOLUTION: The device has an input means for inputting a plurality of video pictures, a plurality of switches corresponding to the plurality of the video pictures, and a means which switches and outputs video pictures corresponding to operated switches in order when the switches are operated. When the plurality of switches are operated, the video pictures corresponding thereto are switched and outputted in order, so that a tasteful interesting video picture scene can be constituted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video signal switching device, and more particularly to a video signal switching device suitable for use in reproducing a plurality of video signals.

[0002]

2. Description of the Related Art Conventionally, in a music scene such as a disco, a club or a rock concert, an image such as a video is broadcast along with the performance of a music piece.

In the above situation, however, music such as rock is played crisply, whereas video is merely playing one video tape monotonously, which is interesting. There was a problem of lacking.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the problems of the above-mentioned conventional techniques, and the purpose thereof is to have a lot of interest when reproducing a video. It is an object of the present invention to provide a video signal switching device that enables reproduction.

[0005]

In order to achieve the above object, the invention according to claim 1 of the present invention is a device for inputting a plurality of images, and a plurality of switches respectively corresponding to the plurality of images. Further, when the plurality of switches are operated, a means for sequentially switching and outputting the images corresponding to the operated switches is provided.

Therefore, according to the first aspect of the present invention, when a plurality of switches are operated, images corresponding to the switches are sequentially switched and output. You can compose a rich and interesting video scene.

According to a second aspect of the present invention, the invention according to claim 2 is a means for inputting a plurality of images, a plurality of switches respectively corresponding to the plurality of images, and a storage means for storing a time interval for switching the images. Further, when the plurality of switches are operated, a means for sequentially switching and outputting an image corresponding to the operated switches at the time intervals stored in the storage means is provided.

Therefore, according to the second aspect of the present invention, when a plurality of switches are operated, the images corresponding thereto are sequentially switched at the time intervals stored in the storage means. Since it is output, it is possible to compose an interesting and interesting video scene.

According to a third aspect of the present invention, the invention is characterized in that means for inputting a plurality of images, a plurality of switches respectively corresponding to the plurality of images, and a case where the plurality of switches are operated. Has a means for sequentially switching and outputting the operated video in accordance with the tempo information.

Therefore, according to the third aspect of the present invention, when a plurality of switches are operated, the video corresponding thereto is sequentially switched and output according to the tempo information. Therefore, it is possible to compose an interesting and interesting video scene.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a video signal switching device according to the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a block diagram showing the overall configuration of a video processing device equipped with a video signal switching device according to the present invention.

The video processing apparatus is constructed so that its entire operation is controlled by using a central processing unit (CPU) 10. The CPU 10 is a read only
The program stored in the memory (ROM) 12 is executed, and the main processing shown in the flowchart of FIG.

The CPU 10 includes a ROM 12 in which a program executed by the CPU 10 for controlling operations such as main processing shown in the flowchart of FIG. 4 and a timing table described later are stored, and a program required by the CPU 10. A random access memory (RAM) 14, which is a working memory in which various buffers and registers and a SW counter described later are set, is attached.

As a video input terminal which is an input terminal for a video signal from the outside, four video inputs of a first video input terminal 21, a second video input terminal 22, a third video input terminal 23 and a fourth video input terminal 24 are provided. A terminal is provided. These four video input terminals are connected to the frame buffer 40 via the switching means 30. Further, the frame buffer 40 is provided with a video output terminal 50 for outputting the video signal stored in the frame buffer 40 to the outside, and the video signal output from the video output terminal 50 is reproduced. Become.

In the CPU 10, the first switch (SW) 61 for selecting the video signal input to the first video input terminal 21 as the video signal to be output to the outside and the second video input terminal 22 are input. Second SW62 for selecting the video signal output to the outside as a video signal to be output to the outside, a third SW63 for selecting the video signal input to the third video input terminal 23 as the video signal to be output to the outside, and a fourth video input terminal A fourth SW 64 for selecting the video signal input to 24 as a video signal to be output to the outside is connected.

That is, the first video input terminal 21 and the first SW6
1 corresponds, the second video input terminal 22 corresponds to the second SW 62, the third video input terminal 23 corresponds to the third SW 63, the fourth video input terminal 24 corresponds to the second SW 64, These first SW61, second SW62, third SW
The 63 and the fourth SW 64 can be operated on / off at the same time.

Further, tempo information indicating the tempo of the music is input to the CPU 10 from the external sequencer 80 or the tap tempo input device 82 via the tempo input switching means 70.

Further, the CPU 10 controls the switching of the tempo input switching means 70 and receives the tempo information from the external sequencer 80 as the tempo information in the CPU 1.
0 or a tempo selection operator 90 for selecting whether to input the tempo information from the tap tempo input device 82 to the CPU 10 as tempo information, and a desired pattern from patterns stored in a timing table described later. And a pattern selection operator 92 for selecting.

Here, the sequencer 80 controls a sound source device (not shown), and plays the stored performance information at the set tempo. The tempo information input from the sequencer 80 to the CPU 10 is, for example, MI.
It is a DI standard tempo clock (F8).

When the user presses a tap switch (not shown) at a desired tempo, the tap tempo input device 82 measures the time interval and sends out tempo information according to the time interval. The tempo information is a MIDI standard tempo clock (F8), which is 24 messages per quarter note.

When the user presses the tap switch of the tap tempo input device 82 in accordance with music generated by a device (for example, a CD player) that plays music (not shown), tempo information synchronized with the music is displayed. The tap tempo input device 82 is generated.

In the above configuration, the main processing in this video processing apparatus will be described with reference to the flow chart shown in FIG. 4. First, with respect to the SW counter and timing table used in the main processing, refer to FIGS. While explaining.

First, FIG. 2 shows a SW counter, which is provided in a predetermined area of the RAM 14. The SW counter has a first SW 61 and a second SW.
62, the third SW 63, and the fourth SW 64, respectively, so that each SW is in an on state or off (of).
f) Memorize whether it is in a state. In this embodiment, four SWs are provided, the area indicated by "count value = 1" indicates the state of the first SW 61, and "count value ="
The area indicated by “2” indicates the state of the second SW 62, the area indicated by “count value = 3” indicates the state of the third SW 63,
The area indicated by “count value = 4” indicates the state of the fourth SW 64, and the maximum value (Max) is 4.

On the other hand, FIG. 3 shows a timing table, which is provided in a predetermined area of the ROM 12 and has a time interval relative to the tempo indicated by the tempo information input to the CPU 10. Is a table showing parameters for setting (hereinafter, "parameter for setting a time interval relative to the tempo indicated by tempo information" is appropriately referred to as "relative tempo parameter"). Specifically, in the timing table, notes are shown as the relative tempo parameters of each step (step) for each of the patterns 1 to n. The video signal output to the video output terminal is switched according to the time interval indicated by the note for each step, as described later.

As described above, the relative time interval of each step of the timing table is represented by the note length, and the physical time interval of the note length depends on the tempo of the music.

When the video processing device is powered on,
Each memory such as the SW counter and the timing table is initialized (S402).

Next, the tempo selection operator 90 is operated to select and set the input of tempo information of either the sequencer 80 or the tap tempo input device 82, and the pattern selection operator 92 is used to set the pattern 1 of the timing table.
~ A desired pattern is selected from the patterns n and set (S404).

Then, the counter value of the SW counter is set to 0.
Is initialized by substituting 0 for the step pointer indicating the step of the timing table (S406).

Next, the first SW61, the second SW62, the third
The SW63 and the fourth SW64 are scanned to determine whether any or all of them are in the ON state (S4
08), if neither SW is on, S40
The process returns to step 4 and is processed.

On the other hand, the first SW61, the second SW62, the third SW
If any or all of the SW63 and the fourth SW64 are in the ON state, it is determined whether there are a plurality of SWs in the ON state (S410), and the S in the ON state is determined.
When W is singular, the switching means 30 is controlled and switched so that the video input terminal corresponding to the SW in the ON state and the frame buffer 40 are connected, and the video output terminal 50 is connected via the frame buffer 40. The video signal input to the video input terminal corresponding to the SW in the ON state is selected as the video signal output from the outside to the outside (S
412).

On the other hand, when there are a plurality of SWs in the ON state, it is detected whether each of the first SW 61, the second SW 62, the third SW 63 and the fourth SW 64 is in the ON state or the OFF state, and the SW is detected. The counter is set to indicate whether each SW is on or off (S414).

Next, the count value of the SW counter is incremented (S416), and it is determined whether the count value of the SW counter has reached the maximum value (Max = 4) (S4).
18).

Here, if the count value of the SW counter is not the maximum value, it is determined whether the SW corresponding to the count value is in the off state (S422), and the count value of the SW counter is the maximum value. In this case, after clearing the count value of the SW counter to 0 (S420), S422
Go to.

The above-described processing of S416 to S422 is processing when a plurality of SWs are turned on. In the flow chart shown in this embodiment,
“First SW61 → second SW62 → third SW63 → fourth S
Since the video signals are switched in correspondence with the ascending order of SW numbers, such as "W64", the first SW6
If all four SWs 1 to 4 SW 64 are in the ON state, from the video signal corresponding to the first SW 61 1 to 4
The video signals corresponding to SW64 are switched in order. However, when the first SW 61 to the fourth SW 64 are discretely turned on, the S in the off state is
The video signal corresponding to W is skipped and switching is performed in order, and for this purpose, the processing of S416 to S422 is performed.

In the determination processing of S422, if the SW corresponding to the count value is in the off state, the process returns to S416, and if the SW corresponding to the count value is in the on state, the count is performed. The switching means 30 is controlled so that the video input terminal paired with SW corresponding to the value and the frame buffer 40 are connected, and the video signal output from the video output terminal 50 to the outside via the frame buffer 40 is counted value. The video signal input to the video input terminal paired with SW corresponding to is switched to (S424).

Next, after incrementing the step pointer indicating the step of the timing table (S42)
6) It is determined whether the relative tempo parameter (the relative tempo parameter is a note in the embodiment) indicated by the pointer for the pattern selected by the pattern selection operator is the end mark (S42).
8) If the mark is an end mark, 0 is assigned to the step pointer (S430), and the process proceeds to S432.
If it is not the end mark, the process directly proceeds to S432.

In the process of S432, a wait timer for waiting a time corresponding to the relative tempo parameter read from the timing table is set according to the tempo indicated by the tempo information, and then the timer wait process is performed in S434.

In the timer wait process, the wait timer is started, and when the set time is exceeded, the main process routine is exited. However, if there is an instruction to cancel other processing, the routine of this main processing is immediately exited.

Regarding the mode of switching each video signal, it is assumed that a predetermined mode is set in advance.

Therefore, in the above video processing apparatus, for example, the pattern 1 of the timing table is selected by the pattern selection operator 92, and the tempo selection operator 9 is selected.
When an external sequencer 80 playing a song with a tempo of "quarter note = 72" is selected by 0,
If the first SW 61, the second SW 62, and the fourth SW 64 are in the ON state, the first image is displayed for the dotted quarter note time, the second image is displayed for the eighth note time, and then the fourth image is displayed. It is repeated that the dotted quarter note time is displayed. Here, the time of each note is a time when the tempo value is 72.

The above embodiment may be modified as shown in the following (1) to (3).

(1) In the above-described embodiment, the order of switching the plurality of video signals is the ascending order corresponding to the first SW to the fourth SW, but it is not limited to this. . For example, an operator or the like may be provided as a designating unit for designating the order of switching video signals, and switching may be performed in the order designated by the designating unit.

(2) In the above-described embodiment, the mode of switching the video signal is set according to a predetermined mode set in advance, but it goes without saying that the mode is not limited to this. . For example, various switching modes such as crossfade and wipeout are stored, and one of the stored modes is selected by a mode selection means such as an operator, and the selected mode is selected. It may be replaced.

(3) The above-described embodiment and the modifications described in (1) and (2) above may be combined appropriately.

[0046]

Since the present invention is configured as described above, it has an excellent effect that it is possible to perform an interesting reproduction when reproducing an image.

[Brief description of drawings]

FIG. 1 is a block configuration diagram showing an overall configuration of a video processing device including a video signal switching device according to the present invention.

FIG. 2 is an explanatory diagram that schematically shows a SW counter.

FIG. 3 is an explanatory diagram that schematically shows a timing table.

FIG. 4 is a flowchart showing a main processing routine.

[Explanation of symbols]

10 Central processing unit (CPU) 12 Read Only Memory (ROM) 14 Random access memory (RAM) 21 1st video input terminal 22 Second video input terminal 23 Third video input terminal 24 4th video input terminal 30 switching means 40 frame buffer 50 video output terminals 61 first switch (SW) 61, 62 Second switch (SW) 63 Third switch (SW) 64 4th switch (SW) 70 Tempo input switching means 80 Sequencer 82 Tap Tempo Input Device 90 Tempo selection operator 92 Pattern selection operator

Claims (3)

[Claims] 1. A means for inputting a plurality of images, a plurality of switches respectively corresponding to the plurality of images, and when the plurality of switches are operated, the images corresponding to the operated switches are sequentially displayed. A video signal switching device having means for switching and outputting. 2. A unit for inputting a plurality of images, a plurality of switches respectively corresponding to the plurality of images, a storage unit for storing a time interval for switching the images, and a case where the plurality of switches are operated. A video signal switching device having means for sequentially switching and outputting video corresponding to the operated switch at time intervals stored in the storage means. 3. A unit for inputting a plurality of videos, a plurality of switches respectively corresponding to the plurality of videos, and when the plurality of switches are operated, the video corresponding to the operated switches is tempo. A video signal switching device having means for sequentially switching and outputting according to information.