JPS61128691A - Regenerating device - Google Patents

Abstract

PURPOSE:To easily synthesize two image signals having different synchronizations by receiving a synchronous signal from a synchronous signal separating detecting means and reading the first image signal stored in a memory synchronously with a synchronous signal of the second image signal. CONSTITUTION:An external image signal such as from a television camera is given through a line l1 to an image synthesizing circuit 11. The external image signal is given through a line l2 to a synchronousseparating circuit 12, by the circuit 12, a horizontal synchronous signal and a vertical synchronous signal are separated and given through a line l3 to an image signal processing circuit 8. In the circuit 8, synchronously with a synchronous signal given from the line l3, the image signal regenerated from a disk 1 stored in a image memory 9 is called out and given to the circuit 11. Thereby, the image signal of the disk 1 stored in the memory 9 and the external image signal synchronize with the external image signal and are synthesized and the synthesized image signal is given to a cathode ray tube 10 and a desired image is displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a playback device, and more particularly to a device that combines and regenerates a video signal from a video disc and an external video signal from an external television camera or the like. .

Background Art When a video disc player synthesizes a video signal from a disc and an external video signal from a television camera, etc., the two video signals have different synchronizations, so they cannot be combined as they are, and a synchronization signal is used. It is also necessary to synchronize the color phase. Therefore, conventional video disc players have complicated circuit configurations, including delay circuits and the like in order to achieve this synchronization.

Problems to be Solved by the Invention In the prior art described above, in order to synchronize two video signals, it is necessary to provide a complicated circuit, which increases manufacturing costs and increases the size of the device itself.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned technical problems and to provide a playback device that has a simple configuration and can easily and reliably synthesize two video signals with different synchronization.

Means for Solving the Problems The present invention provides means for deriving the first video signal, means for deriving the @22 video signal, a memory for storing the first video signal, and a memory included in the second video signal. means for separating and detecting a synchronizing signal from the synchronizing signal; and receiving a synchronizing signal from the synchronizing signal separating and detecting means, and reading out a first video signal stored in a memory in synchronization with the synchronizing signal of the w and second video signals. A reproducing apparatus comprising: means for combining a first video signal read from a memory with the second video signal.

According to the present invention, the first video signal from the means for deriving the first video signal is stored in the memory, and the first video signal stored from the memory is synchronized with the synchronization signal from the second video signal. The signals are read out and the first video signal and the second video signal are combined.

Embodiment The drawing is a block diagram showing the electrical configuration of an embodiment of a reproducing apparatus according to the present invention. The disk 1 is rotationally driven by a motor M. This motor M is phase-controlled by a servo circuit 2 that receives a control signal from an audio signal processing circuit 5. This disk 1 is a high-density recording disk (hereinafter referred to as an AID disk) on which a video signal and an audio signal are pulse code modulated and FM modulated signals are recorded.

Recorded signals such as audio signals and video signals recorded on the disc 1 are read by a pickup 3, and the read reproduction signal is given to a preamplifier 4, amplified appropriately, and led out to an audio signal processing circuit 5. . The audio signal processing circuit 5 performs FM demodulation and digital decoding on the reproduced signal, and the decoded audio signal is provided to the digital/analog converter 6. The audio signal converted into an analog signal by the digital M/analog converter 6 is delivered to a speaker 7 and converted into sound.

The digital video signal digitally decoded by the audio signal processing circuit 5 is led to the video signal processing circuit 8. The video signal processing circuit 8 sequentially writes the digitized video signals into the image memory 9.

This image memory 9 has a number of storage areas corresponding to the number of dots forming the screen of a cathode ray tube 10 serving as a display means, and the digitized video signals are sequentially stored in these storage areas. .

External video signals from TV cameras, etc. are sent via Line I! 1
The signal is applied to the video synthesis circuit 11 via the .

Further, this external video signal is given to a sync separation circuit 12 via a line 12, which separates a horizontal sync signal and a vertical sync signal. Signal processing circuit 8
given to. The video signal processing circuit 8 reads the video signal reproduced from the disk 1 stored in the image memory 9 in synchronization with the synchronization signal applied via the line 13, and supplies it to the synthesis circuit 11. This allows the image memory 9
The video signal of the disk 1 stored in the ROM and the external video signal are combined in synchronization with the external video signal, and this combined combined video signal is applied to the cathode ray tube 10 to display a desired image. Ru.

In this way, the above two different video signals can be easily combined.

As another embodiment of the present invention, an external processing system may be provided separately for instructing which of the video signal from the disc 1 and the external video signal should be prioritized.

Effects As described above, according to the present invention, two video signals with different synchronization can be easily and reliably synthesized with a simple configuration.

[Brief explanation of the drawing]

The drawing is a block diagram showing the electrical configuration of an embodiment of the reproducing device according to the present invention.

Claims (1)

[Claims] Means for deriving a first video signal, means for deriving a second video signal, memory for storing the first video signal, and separate detection of a synchronization signal included in the second video signal. means for receiving the synchronization signal from the synchronization signal separation and detection means and reading out the first video signal stored in the memory in synchronization with the synchronization signal of the second video signal; A playback device comprising means for synthesizing the first video signal and the second video signal.