JPS61233486A - Reproducing device - Google Patents

Abstract

PURPOSE:To obtain a device whose function is expanded remarkably and easy to handle by applying automatic reproduction along with an instruction program and applying easily the reproduction apart from the said instruction program. CONSTITUTION:A control circuit 16 enables a data processing circuit 12 and an instruction storage circuit 13 and instruction data on an instruction 1a picked up through a head 4 is stored in the storage circuit 13 through the data processing circuit 12. The control circuit 16 uses a read circuit 14 to execute an read instruction, gives a count-up pulse to a read circuit 14 to allow the circuit to read the next instruction. When a stop switch 17S is operated during automatic reproduction, a flip-flop 18 in the reset state is set and since its Q output is at a low level, the count-up pulse is stopped by an AND gate 8 and not given to the read circuit 14 and the instruction is fixed at that point of time.

Description

DETAILED DESCRIPTION OF THE INVENTION <Field of Industrial Application> The present invention relates to a reproducing apparatus for reproducing information recorded on a recording medium.

<Prior art> For example, one field or one frame worth of video signals is recorded on each recording track on a recording medium such as a rotating magnetic disk, and a still playback video is obtained by individually and continuously playing back each video signal. Various devices have already been proposed.

In such a device, a command program related to a playback operation such as, for example, playing the video of the 0th track for 0 seconds, then playing the video of the 0th track for 0 seconds, is provided in advance. Automatic playback according to this command program is extremely convenient for the user because troublesome operations such as changing the playback track are no longer necessary.

<Problems to be Solved by the Invention> However, during automatic playback according to the above instruction program, for example, it is possible to skip the video of a track, or if you want to play for a longer time, or if you want to play other tracks that are not in the program. There are often requests to deviate from the command program, such as to play back video of a truck.

The present invention has been made in view of the above circumstances, and it is possible to provide an instruction program related to playback operation in advance so that automatic playback is performed in accordance with this instruction program, while also preventing playback that deviates from this instruction program. It is an object of the present invention to provide a playback device that can be easily operated.

Means for Solving the Problems> The reproducing apparatus of the present invention includes a reproducing means for reproducing recorded information from a recording medium and a storage means for storing an instruction program for controlling the reproducing operation. , an instruction reading means for sequentially reading out individual instructions stored in the storage means, a control means for controlling the reproduction means based on the instructions read by the instruction reading means, and a control means for controlling the reproduction means based on the instructions read by the instruction reading means; and an operating means for performing control that deviates from the instruction program.

In the above configuration, by changing the progress of control of the control means according to the instruction program according to the operation procedure, it is possible to perform a regeneration operation that deviates from the instruction program, and it is possible to perform arbitrary regeneration. I can do it.

For example, if the progress of the control is stopped during playback of information, the same information can be played continuously for any period of time, that is, for a period unrelated to the programmed period, until the stop is canceled. .

Alternatively, by executing another command or jumping to another command in the suspended state, it becomes possible to reproduce any other information.

<Embodiments> Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

First, referring to FIG. 1, l in the figure is a rotating magnetic disk as a recording medium, on which a plurality of concentric recording tracks are formed, and each track stores video signals for l fields or l frames. (video signal) is recorded on FM. The disk l is moved by the motor 2 under the control of the motor servo circuit 3 at a speed corresponding to the field or frame frequency, for example, 3°aOO or 1.80° under the NTSC system.
It can be rotated by Orpm.

Furthermore, in the figure, commands for controlling the sequence of reproduction operations are recorded as data signals in a predetermined track on the disk l indicated by la.

Reference numeral 4 denotes a reproducing magnetic head for reproducing signals of each track on the disk l, and a sequence control circuit 1 to be described later.
The playback position of the disk 1 is switched by moving the disk 1 in the radial direction by the head moving device 5 under the control of the head moving device 6 .

Incidentally, the head 4 and the moving device 5 constitute a reproducing means for reproducing the signal on the disk 1.

The signal picked up by the head 4 is passed through a reproduction amplifier 6 to a video signal reproduction processing circuit (hereinafter referred to as "video signal reproduction processing circuit").

video processing circuit) and data signal reproduction processing circuit (
The data is input to the data processing circuit (hereinafter referred to as data processing circuit) 12. The video processing circuit 10 has a well-known configuration including a demodulator, a luminance-chroma processing circuit, etc., and its output is provided to a video output device such as a TV monitor 11. Furthermore, the data processing circuit 12 has a well-known configuration including a demodulator for demodulating the data signal when it is modulated and recorded using a well-known method, and its output is stored as a command storage means. It is attached to the circuit 13.

Reference numeral 14 denotes an instruction reading circuit serving as an instruction reading means for sequentially reading out a series of instructions stored in the instruction storage circuit 13 under the control of the sequence control circuit 16;
The address counter includes an address counter for specifying the memory address of the memory in the OR gate 7, a register for storing read instruction data, etc.
The count is increased by a pulse from the sequence control circuit 16 or a pulse from the program manual progression switch 15 provided through the program control circuit 16.

Note that the instruction storage circuit 13 has R for storing instruction data.
It has a well-known configuration including a memory such as AM and a write/read controller for the memory, and the write/read controller outputs the contents of the address specified by the address counter in the read circuit 14 to the read circuit 14. In the example, the reproduction operation control command is recorded in a predetermined track la on the disc 1, but it may also be input from outside the apparatus through the input terminal 13a of the storage circuit 13.

173 is a stop switch for stopping the playback operation according to the instruction program stored in the storage circuit 13;
7R is a release switch for canceling this cancellation, 18 is a flip-flop R3 which is set by operating the cancellation switch 17S and reset by operating the release switch 17R, and 8 is when the Q output of this flip-flop 18 is high. 9 is an AND gate that passes the count-up pulse from the sequence control circuit 16 to the readout circuit 14 only when the Q output of the flip-flop 18 is high.
The output of AND gates 8 and 9 is an AND gate that passes the count up pulse for
The address counter in the readout circuit 14 is given the instruction through the readout circuit 14, thereby switching the instruction to the sequence control circuit 16 to the next instruction.

The sequence control circuit 16 functions as a control means for controlling the playback operation of the device based on the playback trigger and the commands read out by the readout circuit 14, and executes the command every time the execution of each command ends. Outputs the above count-up pulse to advance to the next one. The switches 15 and 175 are examples of operating means for causing the sequence control circuit 16 to perform control that deviates from the instruction program stored in the storage circuit 13.

The control operation of the sequence control circuit 16 will now be explained with reference to FIG.

1 Major sequence control circuit When the 16 o'clock playback trigger is given (
Step 501 in FIG. 3), in response to which the motor 2 is activated through the motor servo circuit 3 (Step 50 in FIG. 3).
2) After that, the head moving device 5 is operated to move the head 4 to the command track 1a on the disk 1. When the head 4 finishes moving to the instruction track la (step 504 in FIG. 3), the control circuit 16 enables the data processing circuit 12 and the instruction storage circuit 13, and performs step 5O5 in FIG.
), thereby the command data on the command track la picked up through the head 4 is stored in the storage circuit 13 through the data processing circuit 12. When the storage of this instruction is completed, the control port, path 16, is connected to the data processing circuit 12.
is disabled and the address counter in the readout circuit 14 is reset (step 506 in FIG. 3).
).

Next, the control circuit 16 executes the instruction being read out by the readout circuit 14 (step 307 in FIG. 3), and upon completion, it gives one count-up pulse to the readout circuit 14 to read out the next instruction. (Step 508 in FIG. 3), and then it is determined based on the output of the reading circuit 14 whether or not the instruction is completed (Step 509 in FIG. 3), and if not, proceed to step S07.
If the process is finished, the motor 2 is stopped (step 510 in FIG. 3), and the operation is finished.

The above operation of the sequence control circuit 16 causes automatic playback to be performed according to the instruction program stored in the storage circuit 13, but if the stop switch 173 is operated during such automatic playback, a reset is performed. Since the flip-flop 18 that was in the state is set and its Q output becomes low, the count up pulse output from the sequence control circuit 16 is blocked by the AND gate 8 and is no longer applied to the readout circuit 14, and therefore, At that point, the command will be fixed. This makes it possible to stop the progress of the program and continue playing the video being played at that point indefinitely. If the release switch 17R is operated in this state, the flip-flop 18 is reset and the Q output returns to high, so that the interrupted program can be restarted. Also, cancel switch 17
If the manual progress switch 15 is operated while the program has stopped progressing by operating s, the count-up pulse generated by operating the switch 15 will be The instruction is changed by being applied to the readout circuit 14 through the gate 9 and its address counter counts up, and the sequence control circuit 16 performs control according to this changed instruction. can be controlled manually as desired. Incidentally, if the flip-flop 18 is reset by the release switch 17H, the program will be switched from manual progression to automatic progression at that point.

Other Embodiments FIG. 2 shows the configuration of essential parts of another embodiment of the present invention, which is different from the embodiment shown in the first figure.

In the figure, 19 is a keyboard input device which is another example of the above-mentioned operating means for giving arbitrary control commands to the sequence control circuit 16, and 20 is a keyboard input device which is another example of the above-mentioned operating means for giving arbitrary control commands to the sequence control circuit 16. An instruction selector (data selector) that receives the command and selects one of them for the sequence control circuit 16 according to the Q output of the flip-flop 18, and when the Q output is low, the When the Q output is high, the command from the input device 19 is selected.

In such a configuration, if the tree flop 18 is in the reset state, its Q output is low, so the instruction selector 2
0 is readout circuit 14 for sequence control circuit 16
Therefore, automatic reproduction according to the instruction program stored in the storage circuit 13 described above is performed. On the other hand, when the flip-flop 18 is set by operating the stop switch 17s, its Q output becomes low, so the progress of the instruction program is stopped as described above, and when the Q output becomes high, the instruction selector 20 selects a command from the input device 19 to the sequence control circuit 16.

Therefore, by giving an arbitrary command through the input device 19, it becomes possible to perform an arbitrary reproduction operation. Note that if the flip-flop 18 is reset by operating the release switch 17R, the command to the sequence control circuit 16 will be changed to the command at the time when its progress was stopped by operating the stop switch 175.

In the end, the instruction program is restarted after returning to the instruction at the time of interruption.

Effects> As described in detail above, according to the present invention, as a reproducing apparatus that reproduces recorded information on a recording medium, an instruction program related to reproduction operation is given in advance, and automatic reproduction is performed in accordance with this instruction program. This allows even deviant playback operations to be performed easily, greatly expands functionality, and provides an easy-to-handle device.

[Brief explanation of the drawing]

FIG. 1 is a circuit block diagram of an embodiment of the present invention. FIG. 2 is a partial circuit block diagram showing the configuration of main parts of another embodiment of the present invention, which is different from the first illustrated embodiment. FIG. 3 is a flowchart showing the control flow of the sequence control circuit in FIG. 1-------One-rotation magnetic disk, 4----m-reproducing magnetic head, 5-------head moving device, 10-
1111 video signal reproduction processing circuit, 12--1---data signal reproduction processing circuit, 13--1---command storage circuit,
14---1 instruction read circuit, l 5---1-
- Switch for manual program progression, 18 ---- Sequence control circuit, l 75 ---- Stop switch, 17 R ---- Release switch, 18
---Flip-flop, l 9---1--Keyboard input device, procedural amendment (voluntary) April 1985; day 1° Incident 0 display ttp-t-□2
: )-, : '; Showa 6 Hayabusa 2, Invention name reproduction device 3, Relationship with the case of the person making the amendment Patent applicant address 3-30-2 Shimomaruko, Ota-ku, Tokyo Name (100
) Canon Co., Ltd. Representative Ryu Kaku 3rd Department 43 Agent Address 3-30-25 Shimomaruko, Ota-ku, Tokyo 1413
Specification subject to amendment 6, Contents of amendment As shown in the engraving and attached sheet of the specification originally attached to the application (no change in content).

Claims (1)

[Claims] A reproduction means for reproducing recorded information from a recording medium, a storage means for storing an instruction program for controlling reproduction operation, and an instruction readout for sequentially reading out individual instructions stored in the storage means. a control means for controlling the reproduction means based on the command read by the command reading means, and an operation means for causing the control means to perform control deviating from the command program. A playback device characterized by: