JPS6350177A - Video signal recording method - Google Patents

Abstract

PURPOSE:To cope with video signals suitable for the number of frames per second of the video signal system of a receiver by recording and reproducing at the number of frames the least common multiple of the number of frames per second of each video signal system. CONSTITUTION:The first and second recording video signals 1, 2 are the same video signals and different in sampling interval in time axis. The number of frames per second of the first recording signals is six frames/second and the number of frames per second of the second recording video signals is nine frames/second. In this case, the first and second recording video signals 1, 2 are superposed on the first, seventh and thirteenth frams. However, the first and second recording video signals 1, 2 are the same in the first, seventh and thirteenth frames, and only one is recorded actually. When reading the recorded video signals, the first or the second recorded video signals are read out conforming to the number of display frames per second of a receiver.

Description

[Detailed Description of the Invention] Industrial Application Fields In recent years, images of video signal systems (television systems), which differed from region to region, have been transferred to other video signals using video tapes, video discs, and various other optical discs. It is increasingly being played in areas where this method is used. At this time, compatibility between different systems is important. Particularly in the case of content that involves movement, such as sports, it is difficult to convert between systems that have different numbers of frames per second.

The present invention relates to a video signal recording method capable of recording a plurality of video signals having different numbers of frames per second.

BACKGROUND ART FIG. 2 is a diagram showing an example of a conventional configuration. 4 is a recording medium, on which video signals of a plurality of systems are recorded. Reference numeral 5 denotes a video signal reading device, which receives a signal 4a recorded on the recording medium 4 as input and outputs a video signal 5a in the format recorded on the recording medium 4.

Reference numeral 6 denotes a receiver, which inputs video signals 5a of various formats output from the video signal succession device 5, determines the format of the video signals 5a, and displays the results.

Problems to be Solved by the Invention In such a conventional configuration, since the output video format differs depending on the video signal readout device, it is necessary to prepare a receiver that can handle input of various video formats. The circuit configuration becomes extremely complicated.

The present invention has been made in view of the above, and an object of the present invention is to provide a video signal recording method capable of recording and reproducing a video signal compatible with the number of frames per second of the video signal system of a receiver.

Means for Solving the Problems In order to solve the above problems, the video signal recording method of the present invention records video signals of the same content using a plurality of video signal systems having different numbers of frames per second. It is possible to record and reproduce the number of frames that is the least common multiple of the number of frames per second of each video signal system. Furthermore, other data can be recorded and reproduced in frames in which video signals are not recorded among the least common multiple frames.

According to the above-described configuration, the present invention can provide a video signal recording method capable of recording and reproducing video signals compatible with the number of frames per second of receivers using a plurality of different video signal systems.

Embodiment FIG. 1 is a diagram showing a first embodiment of the video signal recording method of the present invention. FIG. 1 shows the recorded content for one second. In Figure 1, 1 is the first recorded video signal recorded at the number of frames per second of the first video signal system, and 2 is the number of frames per second recorded at the number of frames per second of the second video signal system. This is the second recorded video signal. The first recorded video signal and the second
The recorded video signals are the same video signals, but have different sampling intervals on the time axis. In this embodiment, the number of frames per second of the first recorded video signal is 6 frames/second, and the number of frames per second of the second recorded video signal is 9 frames/second. be. The first recorded video signal and the second recorded video signal are recorded in a superimposed manner in the first frame, seventh frame, and thirteenth frame. ,
The first recorded video signal and the second recorded video signal are the same, and only one is actually recorded.

When reading the recorded video signal, the first or second recorded video signal is read out in accordance with the number of display frames per second of the receiver.

FIG. 2 is a diagram showing a second embodiment of the video signal recording method of the present invention. FIG. 2 shows the recorded content for one second. In FIG. 2, 1 is a recorded video signal recorded at the number of frames per second in the first video signal system, and 2 is a recorded video signal recorded at the number of frames per second in the second video signal system. , 3 are other data, and still image data, audio data, etc. can be recorded and reproduced in this frame. The first recorded video signal and the second recorded video signal are the same video signal, but have different sampling intervals on the time axis. Book-
In the embodiment, the number of frames per second of the first recorded video signal is 6 frames/second, and the number of frames per second of the second recorded video signal is 9 frames/second. The first recorded video signal and the second recorded video signal are recorded in a superimposed manner in the first frame, seventh frame, and thirteenth frame. , the first recorded video signal and the second recorded video signal are the same, and when reading out only one recorded video signal, they are read out according to the number of display frames per second of the receiver. The first or second recorded video signal is read out. 3 is performed separately from the reading of the first recorded video signal and the second recorded video signal.

In the first embodiment and the second embodiment, two different types of video signals are recorded, but it is also possible to record three or more types of video signals.

Effects of the Invention As described above, the present invention allows video signals of the same content to be transmitted using a plurality of video signal systems having different numbers of frames per second. By recording and reproducing the corresponding frames of a recording and reproducing device that can record and reproduce the number of frames that is the least common multiple of , it is possible to record and reproduce a video signal that is compatible with the number of frames per second of the video signal system of the receiver. This provides the following effects.

In other words, it is possible to always keep the format of the output video signal from the video signal readout device constant depending on the receiver, and the receiver only needs to support a video signal format with a single number of frames. The circuit configuration becomes easy.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing a first embodiment of the video signal reading device of the present invention, FIG. 2 is a schematic diagram showing a second embodiment of the video signal reading device of the present invention, and FIG. FIG. 1 is a block diagram showing a conventional video signal reading device and a receiver. 1...First recorded video signal, 2...Second recorded video signal, 3...Other data (still images, audio, etc.), 4... ...Recording medium, 5...
Video signal reading device, 6... TV receiver.

Claims (2)

[Claims] (1) A video signal with the same content can be recorded and played back using multiple video signal formats with different numbers of frames per second, with a number of frames that is the least common multiple of the number of frames per second of each of the video signal formats. A video signal recording method characterized by recording and reproducing in a corresponding frame of a recording and reproducing device. (2) The video signal recording method according to claim (1), characterized in that other data is recorded and reproduced in a frame in which a video signal is not recorded among the least common multiple frames.