JPS5924411A - Video and audio reproducing device - Google Patents

Abstract

PURPOSE:To reproduce synchronously video information and audio information, by performing address conversion for linking a video and an audio signal reproducing device together. CONSTITUTION:Keys on a keyboard 6 are operated to specify a frame number FNR and access operation is started. A control part 5 performs the address conversion to find a number code TNR and an index code IX corresponding to the specified frame number, and they are supplied to a compact disk player 2, starting the access operation. Position data and an access address from a video disk player 1 are compared mutually by a control part 5 to detect whether the acess operation is completed or not. Then, the video disk player 1 performs still picture reproducing operation. The compact disk player 2 is switched from a pause state to a play state to supply audio signals reproduced from a compact disk to speakers 4A and 4B.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention combines, for example, a digital audio disc (referred to as a compact disc) player and a video disc player, and synchronizes video information and audio information related to each other. The present invention relates to a video and audio playback device that can play back video and audio.

"Background technology and its problems" Optical or capacitive video discs can record tens of thousands of still images and have the advantage of being able to access these images in a short period of time. There is. Therefore, it can be expected to be applied to education, information services, etc.

However, in order to play the same track repeatedly,
There was a drawback that audio signals could not be played back at the same time. Several systems have been proposed that make it possible to simultaneously reproduce still images and audio using video frame memory or audio compression technology, but these systems tend to have a complicated configuration and increase costs.

On the other hand, compact disc players play digital audio signals, are capable of high-density recording, and have access capabilities similar to video disc players.

``Object of the Invention q This invention simultaneously reproduces video information and audio information that are related to each other by combining a video signal reproducing device such as a video disc player and an audio signal reproducing device such as a compact disc player. It has been made possible to do so.

``Summary of the Invention'' In the present invention, since addresses are different between a video signal reproducing device and an audio signal reproducing device, address conversion is performed to connect the two.

Embodiment Hereinafter, an embodiment of the present invention which combines a video disc player and a compact disc player will be described with reference to the drawings.

The address signal used in video disc players is
They are a chapter (/~99) and a frame number FNR (/~7q999). Also,
A compact disc player uses an address signal included in a cue signal of a predetermined format for access.

FIG. 1 shows the signal configuration of the Q channel, which is one of the cue signals of a compact disc player. this is,
Sink pattern S. , after the a bit of So, the control bit of g bit, 11. Bit address bit, 7.2 bit data Q.

/4-bit CRC codes are arranged in sequence. The control bit indicates whether it is a co-channel or a Q-channel and whether pre-emphasis is applied. Into this data Q, a number code TNR that increments for each program such as music recorded on the compact disc and an index code IX that further divides this number code TNR are inserted. A time display code (T IME ) and a first time display code (AT IME ) are inserted. This first time display code indicates the length of the seven programs, and the first time display code indicates the running time in the program area of the compact disc. The number code TNR is in the range (/~99), and the index code IX varies in the range (/~wata) for each number code TNR ≧.

Both the frame number FNR of the video disc player mentioned above and the number code TNR and index code IX of the compact disc player are linked.

- As an example, when frame number FNR is used as the master, the address signal of the compact disc player is determined by the following equation.

IX= FIR-(TNR-/) X 99For example, if claim number FNR is 99,
99) and the address signal of the compact disc player is constant υ, and if the frame number FNR is /θ0, then ('rNR-==2, IX-/) and the address signal of the compact disc player are constant -t, ! lll, it is possible to make a correspondence between the two.

In this way, if the frame number FNRe is different from the master address signal TN of the compact disc player,
Address conversion may be performed using R and IX as masters.

FIG. 2 shows the overall configuration of an embodiment of the present invention, in which 1 is a video disc player, and 2 is a compact disc player. The video disc player 1 optically plays back a video disc on which 5tiooo frame still images are recorded.The still image to be played is specified by the frame number FNR, and the played still image signal is sent to the monitor TV. The signal is supplied to the receiver 3. In the compact disc player 2, an audio signal to be reproduced is specified by a number code TNR and an index code IX, and the reproduced audio signal is supplied to speakers 4A and 4B.

Reference numeral 5 denotes a control unit that supplies access addresses and remote control commands to the video disc player 1 and the compact disc player 2, respectively.

Further, position data indicating the current playback position is supplied from both players 1 and 2 to the control section 5. In connection with the control section 5, there is provided a keyboard 6 with numeric keys and function keys, and a display device 7 for displaying access addresses and control information.

The control unit 5 includes a microprocessor and controls the operations of the video disc player 1 and the compact disc player 2 according to the flowchart shown in FIG.

First, the 7V-me number FNR is designated by key operation on the keyboard 6. This is given to the video disc player 1 as an access address, and an access operation is started. Further, in the control section 5, address conversion is performed based on the above-mentioned formula, and the number code TNR and index code IX corresponding to the designated frame number are determined. This determined TNR and I
X is supplied to the compact disc player 2 as an access address, an access operation is started, and when the access is completed, a pause state is entered.

Then, the position data from the video disc player 1 and the access address are compared in the control unit 5, and it is detected whether the access operation has been completed. The coincidence of the position data and the access address means the end of the access operation, after which the video disc player 1 performs a still image reproduction operation. In this case, the control unit 5 may receive the access end signal generated by the video disc player 1 and be pressed to detect the end of the access.

Next, the end of the access operation of the compact disc player-y 2 is detected, as described above, by a match between the access address and the position data or by an access end signal from the player. When the access is completed, the compact disc player 2 is switched from the pause state to the play state, and the audio signal reproduced from the compact disc is supplied to the speakers 4A and 4B.

It is then checked whether the position data generated from the compact disc player 22 has increased by /. It is detected that the number code TNR or index code IX as an access address with (+/) is the position data. As a result, the end of the video and audio playback operation of the designated frame number is detected, the operation of the compact disc player 2 is put into a pause state, and the playback sound is no longer heard. Then, a blank message is displayed on the display section T, which means that the reproduction has ended.

"Application example" In addition to using numerical keys, the frame number may be entered by changing the frame number in steps or by using a predetermined program.
An OM may also be provided. Also, video disc player 1
It is also possible to play back not only still images but also moving images.

While the moving image is being played back, the video disc player 1 also plays back the audio signal at the same time. Furthermore, it is not necessary to detect the end of the access operation, and a timer may be used to end the access operation after a certain period of time.

Further, since the number of still images that can be recorded on a video disc is large, a configuration may be adopted in which seven video disc players and a plurality of compact disc players are combined. Furthermore, video signals or audio signals may be reproduced using a rotary head type VTR or a fixed head type audio tail recorder.

``Effects of the Invention'' According to Jin's invention, video information and audio information can be played back in full synchronization. In this case, it is sufficient to provide a simple control section that converts the address signal, and the device can be realized at low cost.

[Brief explanation of drawings]

Figure 1 is a route map used to explain the address signal of a compact disc, Figure J υ is a block diagram showing the overall configuration of an embodiment of this invention, and Figure 3 d is a diagram used to explain the operation of an embodiment of this invention. This is the 70-diat used. 1・・・・・・−・・・・・・Video disc player,
2...Compact disc player, 5...Track...Control section. Figure 1 ADR

Claims (1)

[Claims] a video signal reproducing device that can access and reproduce predetermined video information using a first address signal; an audio signal reproducing device that can select and reproduce predetermined audio information using a second address signal; means for determining that the address signals have a predetermined relationship;
A video and audio playback device that accesses this predetermined address and performs synchronous playback.