JPS6034162B2 - Image recording method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a digital image recording method.

Conventionally, when it was desired to change a part of an image signal already recorded in an image file, the entire screen was updated in order to prevent noise from occurring at the boundary of the changed part of the screen.

Therefore, there is a drawback that the load placed on the image signal generator increases. In view of the above-mentioned drawbacks of the prior art, the present invention provides a method for effectively utilizing an image signal generator for recording into an image file. Therefore, the present invention records the image signal of the changed portion and a switching signal indicating the changed portion in a separate area of the recording medium, and switches the partially changed portion of the old image signal to the new image signal at the time of playback. This eliminates the drawbacks of the prior art.
The present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a diagram for explaining the principle of an image recording method according to the present invention, and FIG. 2 is a block diagram showing an example of a specific implementation thereof.

The present invention is applied to a recording medium on which a plurality of channels can be simultaneously recorded and reproduced.

Now, as shown in FIG. 1, it is assumed that an old image signal 1 is recorded on a recording medium A of a certain channel.

If you want to change only the changed part 2 to a new image signal, record the new image signal 4 and switching signal 3 that cover the time of the changed part 2 on recording media B and C of different channels, and then record the switching signal 3. The new image signal 4 of the recording medium B is controlled by the command, and the new image signal 4 is switched with the changed portion 2 of the recording medium A having the old image signal 1 and output. FIG. 2 is a specific circuit diagram for implementing this image recording method. In the figure, 5 is a signal terminal to which the old image signal 1 of the recording medium A shown in FIG. 1 is input, and 6 is a signal terminal for the recording medium A. This is a signal terminal to which the new image signal 4 of B is input. Further, 7 is a switching signal input terminal for switching and controlling the signal terminals 5 and 6, and the switching control circuit 8 is activated by the switching signal inputted from the signal terminal 7, and the switching control circuit 8 is activated to switch the changeover switch 9 to the respective signal terminals 5 and 6. The configuration is such that the connection can be switched between
Note that 10 indicates an image signal output terminal. As described above, in this embodiment, the switching control circuit 8 drives the changeover switch 9 in response to the switching signal from the input terminal 7, and switches between the new and old image signals, thereby changing the new image signal 4, which is the changed part. An image signal in which only the signal is switched is output from the output terminal 10. As is clear from the above-described embodiments, according to the present invention, a new image signal of a changed portion and a switching signal indicating the changed portion are stored in a separate area of the recording medium in advance, and the old image signal is Only the changed portion is switched to the new image signal and output. Therefore, the new image signal only needs to have information on the changed portion, and there is an advantage that the image signal generator can be used effectively.

[Brief explanation of the drawing]

FIG. 1 is a diagram for explaining the principle of the image recording method of the present invention, and FIG. 2 is a block diagram showing an example of a specific implementation of the present invention. A, B...recording medium, 1...old image signal, 2...changed part, 3...switching signal, 4...new image Signal, 5-7...Input terminal, 8
......Switching control circuit, 9...... Changeover switch, 10... Image signal output terminal. Figure/Figure 1 Shio Figure 2

Claims (1)

[Claims] 1. When changing a part of an image signal recorded on a recording medium such as an image file, record the image signal of the part to be changed and a switching signal instructing the changed part in another area of the recording medium, An image recording method characterized by switching and recording only a partially changed part of an old image signal to a new image signal during playback.