JPH0313190A - Method for transmitting, recording, and reproducing plural moving images by time division - Google Patents

Abstract

PURPOSE:To perform transmission in sufficiently short null time without lowering the resolution of image data by using a single transmission line by transmitting plural moving images by switching at every field frame unit, CONSTITUTION:The signal Vi (i=1, 2,..., N) of moving image data is inputted to a switching device synchronizing with a signal generated at a field frame signal generating part, and the signal of the moving image data is converted to a single composite image data signal by switching with a timing synchronized with a field frame signal with the switching device. At a reception side, the field frame signal is separated from the composite image data signal, and only a desired image data signal is written on a field frame memory by inputting the field frame signal to an N-ary counter FK, then, a targeted moving image data can be reproduced. Thereby, it is possible to transmit, record, and reproduce the plural moving images with comparatively few amount of change without null time when no transmission is performed and without lowering the resolution of the image data.

Description

[Detailed description of the invention] [Industrial application field] The present invention can process multiple moving images with relatively little change.

The present invention relates to a method of transmitting, recording, and reproducing image data using a single transmission path without any blank time during which no data is being transmitted and without reducing the resolution of image data.

One application field is the analysis of human behavior.0 When analyzing human behavior, it is necessary to simultaneously observe it from multiple perspectives from multiple perspectives. At this time,
The data of multiple observed events is video data, and their temporal context is.

Since it provides important clues when inferring the cause and effect relationships between events, it must be accurately transmitted, recorded, and played back. Also, there must be no blank time that is not transmitted or recorded. However, changes in human behavior are thought to be relatively gradual.

Therefore, a transmission/recording/reproduction method according to the present invention is needed.

[Conventional technology] When transmitting, recording, and reproducing multiple image data that influence each other, the same number of transmission paths and recording media as the number of moving images are used, and the multiple signals are synchronized and reproduced. There is a method to do this. This method requires the same number of transmission lines and recording media as the number of moving images, and also has the disadvantage that the equipment becomes even more complex because it is necessary to achieve time synchronization when the signal passes through a recording medium. There is.

On the other hand, there is also a method of reducing individual image data through image processing, combining multiple image data to reconstruct it into one image data, and then using a single transmission path, recording medium, and playback. However, this method has the disadvantage that the resolution of image data recorded and reproduced is reduced.

There is also a method of transmitting and recording a plurality of moving images using a single transmission path by switching the moving images to be transmitted and recorded at regular intervals. However, in this method, if the switching time interval is T, and the number of moving image data to be transmitted and recorded is N, the disadvantage is that each moving image data has a blank time (N-1)T that is not transmitted or recorded. There is.

[Problems to be Solved by the Invention] The purpose of the present invention is to solve the problem by using a single transmission path/recording medium.
The object of the present invention is to obtain a transmission, recording, and reproducing method in which the blank time is sufficiently short without deteriorating the resolution of image data.

[Means for Solving the Problems] In order to achieve the above object, in the transmission/recording/playback method of the present invention, a plurality of moving image data are switched and transmitted/recorded in units of fields/frames.

On the receiving side, image data is stored and updated in units of fields and frames. In other words, this method reduces the switching time of the conventional method of switching the moving image data transmitted and recorded at fixed time intervals to the maximum field/frame unit t, so that each moving image data can be transmitted and recorded more easily.
The unrecorded blank time is calculated from (N-4)T to (N-1
)t. In general, the T used is 10 to 30 seconds, but when the video signal is an NTSC signal, it is sufficiently short at 1/60 second, so it can be used in application fields where blank time with conventional methods is a problem. becomes possible. In addition, with this method, switching is done in the field.
Since it is performed in units of frames, it is assumed that all N sets of moving image data are synchronized.

When receiving moving image data transmitted and recorded using this method, the receiving side prepares a field/frame memory and updates the contents of the field/frame memory only in the case of desired image data. Recreate the day and evening.

[Embodiment] FIG. 1 shows the configuration of an apparatus implementing the first and second claims of the present invention.

In the figure, a signal V4 (i=
1.2. + + N) is input to the switching device. A switching device switches these moving image data signals at a timing synchronized with the field frame signal and converts them into a single composite image data signal.

FIG. 2 shows the configuration of an apparatus implementing claim 3 of the present invention.

In the figure, only the desired image data signal is written to the field/frame memory by separating the field/frame signal from the received composite image data signal and inputting it to an N-ary counter, thereby generating the desired moving image data. Reproduce.

FIG. 3 shows the relationship among the field/frame signal, each moving image data signal, the composite image data signal, the field/frame memory write control signal, and the reproduced moving image data signal.

[Effects of the Invention] As detailed above, according to the method of the present invention, multiple moving images with relatively little change can be processed without any blank time during which they are not being transmitted, and without reducing the resolution of image data. In addition, method 1 of transmitting, recording, and reproducing data using a single transmission path can be obtained.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an apparatus implementing the first and second claims of the present invention, FIG. 2 is a block diagram of an apparatus implementing the third claim of the present invention, and FIG. Figure 1.2 shows the relationship between the signals handled. Figure 1 Figure 3 Figure 2 Vk (K-VW (N+K) Procedural amendment (method) Date of amendment order September 26, 1999 Target of amendment January 18, 1990 Drawings of application and specification 2゜3゜4゜Indication of the case 1999 Patent Application No. 149829 Name of the invention Method for transmitting, recording, and reproducing multiple moving images by time division Person who makes the correction Relationship to the incident Patent applicant address 1-3-1 Kasumigaseki, Chiyoda-ku, Tokyo Name (1
14) Director of the Agency of Industrial Science and Technology Ken Sugiura Designated Agent 〒305 Details of the amendments The following amendments will be made to the specification of this application as shown in the attached sheet. (1) “Figure 3 is” in the third line from the bottom of page 6 is corrected as follows. "Figure 3 is..."

Claims (1)

[Claims] 1. By switching and transmitting a plurality of moving images in units of fields and frames, a plurality of moving images with relatively little change can be transmitted over a single transmission path without any blank time during which they are not being transmitted. How to transmit by. 2. A method of recording a plurality of moving images with relatively little change on a single recording medium without recording any blank time by switching and recording a plurality of moving images on a field/frame basis. 3. A method for separating and reproducing transmitted and recorded signals as a plurality of independent moving images as set forth in claims 1 and 2.