JPS59175062A - Reproducer of information recording medium - Google Patents

Abstract

PURPOSE:To reproduce various types of information recording media as desired by controlling each part including external devices which operate with the same clock based on the mode information corresponding to the type of an information recording medium. CONSTITUTION:When a recording medium of a disk player main body 1 is equal to a video disl 101, an address signal demodulating part 111 is actuated by a status information generating circuit 107b, a mode detecting circuit 107a, etc. of a system control part 107. Then a reproduced and demodulated address given from the part 111 is applied to an external control device 3 which works synchronously with the main body 1 with the clock sent from the part 107. An address and a command given from the device 3 based on the address given to the device 3 are supplied to the part 107 to control the desired reproduction of muting, etc. In the case of an audio disk, the part 111 is inactive. Then an address is produced from a reproduced FM signal at the demodulating part of an adaptor part 4 and applied to the deice 3. Thus the reproduction is controlled in the same way. So is with a case where the recordong medium is equal to an ROM109, etc. Then various types of recording media can be reproduced as desired.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an information recording medium reproducing apparatus, which is capable of transmitting and receiving information at the same timing between external devices such as a reproducing apparatus, and performs highly immediate control. It is an object of the present invention to provide a reproducing apparatus that can acquire address information corresponding to various information recording media of different formats and can reproduce any information recording medium.

The applicant first formed a separate internal groove.
Required information signal and tracking control reference signal (hereinafter referred to as
A disk-shaped information recording medium (hereinafter referred to as a disk) in which electrode functions are recorded in a spiral manner as changes in geometric shapes (referred to as racking signals), and a reproducing needle having electrodes. We have proposed a reproducing device that reads and reproduces the above word signal using relative sliding scanning.

1. In the disk, main information signals such as video signals are recorded in 4 fields per revolution (playback time of about 1 hour per side), 54. It can be thought of as a video information file with the capacity of an OOO track. Therefore, in addition to just normal playback of this disc, random access and special playback are also performed using the 71~response information recorded on the disc. outside of (ill 饋1
By connecting one device and performing various random accesses and special reproductions, it is possible to enjoy, for example, games.

Therefore, the present applicant previously proposed a disc reproducing apparatus connected to the above-mentioned external control device in Japanese Patent Application No. 8033/1983 entitled "Disc-shaped Information Recording Medium Reproducing Apparatus".

First, the operation of the disc playback device proposed above will be explained. In Fig. 1, 1 is the disc player body, 2 is the interface section, and 3 is the external control device (there is a disc 10).
The signal read from 1 by the playback button 102 is sent to the signal processing unit 1.
03, and output terminal 104 as a video signal.
On the other hand, the L channel A7 audio signal and the R
Channel t')Fi output terminal 104L, 1
04nJ is taken out, and it is FM demodulated in the (t\'i processing section 103) and taken out as it is as an FM high frequency signal from the output terminal 104 t.
The various signals taken out from F, 104v, 104L, and 104R are supplied to, for example, a preview receiver, an external control device 3, or a double section 4 (to be described later), respectively.
No. 3, the sound is transmitted to people's picture tubes, and the sound is emitted from each speaker 7J, and is also output from a predetermined output terminal J:.

It is separated in the pH unit 103 and the tracking signal is 1 to 1.
1 supplied to the control section 105 and taken out from there.
The tracking control signal is supplied to the tracking coil 106 of the regenerator 102, and the tracking control signal is supplied to the tracking coil 106 of the regenerator 102.
Raw 1t 102 is the main information No. 1 of disk 101]・
The drive is controlled to correctly race the rack.

The 7-all instruction signals taken out from the system controller unit 107 are supplied to the servo control unit 105, and the t-control signals taken out from the system controller 107 are supplied to the motor 108, which receives J, The motor 108 is rotated at a predetermined number of rotations according to an instruction from the system control unit 107.

Furthermore, when an instruction is given using the key operation unit 109 to perform random access, for example, the system control unit 10
7 is based on the later-described time address signal reproduced from the disc 101 (controls the gods) and displays the time address currently being reproduced on the disc 101 on the display 110.

On the other hand, on discs 1' and 01, the time address of the recorded information content (low 1' in [elapsed time from this 1 to 41Q]) is recorded within the vertical retrace period of the video signal, and the playback The address reproduced in the total 102 is supplied to the address signal demodulation section 111 to generate the address information shown in FIG.
and are supplied at the same time. At this time, the system control unit 107 sends the synchronization clock number a shown in FIG.
simultaneously supplied to the interface section 2 via 12,
System controller 1 to roll unit 107 and external control device 33
receives address information at the same time using this clock signal a.

For example, when operating the external control device 3,
From 0 minutes 10 seconds to the elapsed time of 20 minutes 30 seconds 2-1 <When the command ``fast playback'' is executed, the J
': The J cloak information d is supplied to the C system control section 107 via the interface section 2. As a result, the system control section 107 controls the reproduction needle transfer position (g).
(not shown), etc., and the player 17 main body 1 plays back the disc 101 at double speed for a specified time. Incidentally, while reaching a predetermined portion of the disc 1.01, the control signal processing unit 103 from the control unit 107 is supplied to the system to meed the video signal 45 sound ij7 signal.

In this case, the address of the f-ick 101 changes every moment, and the external control device 3 always uses this address as Bj and the supervisor 7.
3i! It is necessary to perform processing according to the address of the lever, and immediacy is required for the input information. receives the address information at the same time.By doing this, the system control a+10
7 and outside? The 111 control device 3 can process the same address information at the same timing, making it possible to control with high immediacy.

Note that there are generally two types of information transmission methods: a parallel method and a serial method. Although the signal transmission efficiency is high, the connection cost I· is high, making it disadvantageous for use by connecting external control equipment. On the other hand, the latter has a lower connection cost and is advantageous when used by connecting an external control device. Therefore, in this playback device, the information transmission method is a serial method, and the cost of connection with the external control device 3 is reduced.

The above is the operation of the disc playback device previously proposed by the present applicant.Next, the operation of the device of the present invention will be explained.

Disc 101 that can be played on disc player main body 1
In some cases, several types of discs with different recording methods (for example, video discs, audio discs, or
There are memory disks dedicated to continuous output of data recorded with CM signals (7 files, etc.), but the external control device 3
What kind of disc is the disc installed in the player body 1, and what kind of playback state the Blaeno body 1 is in, such as normal playback, special playback, random access, still playback, etc. By making information available, we can control everything. Information indicating the disc loaded in the player main body 1 and the playback status will be referred to as status information.

For example, when a video disc is loaded, the upper disc detection circuit 107a of the system control unit 107 detects the hidden sub disc 7 (for example, when a case for storing a disc is inserted into the player body 1, (This is done by detecting the position of a notch provided on the front side of the mode), a mode instruction number corresponding to this mode and a control signal indicating the playback state are supplied to the status information generating circuit 107b and the second While it is set as status information C as shown in FIG. Status information C indicating the mode and playback status of the loaded disc is supplied to the external control device 3 via the interface section 2, and the external control device 3 uses this status information C to control the player main body 1.
Find out the status of 1q.

This status information C is sent from the system control unit 107 to the external control device 3 in response to the clock signal a, similarly to the address information described above.

In this case, all three types of information 9FJ, address information 1), status information C, and command information d, are transferred between each device using the clock signal a of ■^I-.

When playing a video disc under external control, as explained above, predetermined control signals are taken out from the system controller 1 to the roll unit 107 in response to command information from the external control device 3, and random access, special playback, etc. will be carried out.

On the other hand, when an audio disc is installed, the audio disc mode is detected by the seventh-order detection circuit 107a, and the mode instruction signal is sent to the status information generation circuit 10711.
and is supplied to the address signal demodulation unit 111, making it inactive. Further, status information according to the audio disc mode is extracted from the status information generating circuit J and supplied to the adapter section 4, which is used to determine the operating state.

The playback signal extracted from the audio disc is processed by the signal processing section 103, and output ψJ 104F.
The FM high frequency signal that is not FM demodulated is extracted and supplied to the -C adapter section 4. In the address signal forming circuit of the adapter section 4, address information is formed directly from the FM high frequency signal and is supplied to the system control section 107 of the player body 1 via the terminal 112, while the video signal forming circuit of the adapter section 4 and Sound 7 is also directly formed from the FM high frequency signal into a video signal, an L channel audio signal, and an R channel audio signal in the signal forming circuit, and is extracted from the Z terminals 4V, 4L, and 4R. In this case, the terminals 104v, 104+, of the player body 1.

No signal is taken from 104R.

When playing an audio disc using external control,
As in the case of a video disc, a predetermined control signal is extracted from the system control unit 107 in response to command information from the external control device 3, and random access and special playback are performed.

In addition, in the case of a video disc, in 1514, the address information b1 status information C and command information d are all transferred between each device using the same clock signal a.

On the other hand, when a read-only memory disk is installed, as in the case of the audio disk, the adapter section 4 is activated by the status information from the status information generation circuit 107b of the system control section 107, and the address signal demodulation section 111 is inactive, and the FM high frequency (l) from the output terminal 104F of the player body 1 is
It is sufficient to supply the data No.

In this case, the terminals 104v, 104t- of the player body 1
, 104R and the terminal 4v of the adapter section 4.

No signals are taken from /i, , /I+<. Also, when playing under external control, as with the above disc,
Command information is sent from the external control device 3 to the player body '1-
control by sending it to.

In this way, the device of the present invention detects the type of disc loaded, and in the case of a video disc, the address information is transmitted from the address signal demodulation unit 111 to an audio disc with a different recording method from the video disc, or a read-only disc. In this case, the configuration is such that the address information is switched from the adapter section 4 to the system controller 1 to the roll section 107, respectively. .

Now, consider the timing of the clock signal a, address information b, status information C, and command information d. As shown in FIGS. 2(A-) to 2(D), the signal a is 2! during the first power plane scanning period IV of the video signal. According to this, the number of information bits of each information item A, c, and d is unified to 25 (i.e., each information is transmitted every manual scanning period Tv). ) 5 In this way, all information is stored in the first-power plane scanning period T.
Since the information is configured with the same number of bits for each device, it is easier to transfer data between devices and control it than if each piece of information is configured with a different number of bits.

The information corresponding to the third and fourth clocks of the clock signal a that is input to J5L in FIG. 2 (Δ) to (D>) is shown enlarged in FIG. When the maximum period TCM of the clock period Tc of the clock signal a is selected to be 1.2 ms, there is a non-clock period (Ding〉Ding) near the end of one vertical scanning period Tv with a period of time larger than the maximum clock period 11j 1" CM. In other words, the period of clock signal a fluctuates as shown in the figure <A), but due to this fluctuation, the period T(!-nothing) is longer than the maximum clock period TCM. Select the cycle period.

As a result, by detecting the non-clock period T, the system control unit 107 and the external control device 3 can reliably achieve so-called frame synchronization even when there is some variation in the period of the clock signal a. Check the field switching and press i! do. Note that frame synchronization can also be achieved by detecting vertical synchronization signals from the reproduced video signal.

1j, the tallock width of the clock signal a shown in FIG.
Even with hardware that can process data in microseconds or with software that requires a certain amount of time to process various programs, data can be sent and received reliably. J5, in FIGS. 2(E) to (1-1), ts is the data let up time and th is the data hold time.

, 1. As described above, the disc playback device according to the present invention is supplied with address information and command information from an external device, and re/Uses main information between a predetermined period of time in a predetermined playback mode.
:'tl, detects the type of disk being loaded, sets the address information demodulator to the active state, sets the mode for reading address information, and sets the address information demodulator to the inactive state. A control unit that switches the mode to take in address information retrieved from an external device, and a status information generating unit that outputs status information indicating the type of disc loaded and its playback status to the external device. , address information, command information, and status information are all transferred between each device and each section using one type of synchronous clock signal, so each information can be transferred at the same timing between the control section and external devices. This allows for highly immediate control, and
Acquires address information according to the type of disc being played, thereby making it possible to play back a variety of discs with different recording methods.Furthermore, main information such as video ID, address information, command information, and status information can be acquired. is made up of a plurality of identical bits with one vertical scanning period of the video signal as one unit, so data transfer between each device is easier than when each piece of information is made up of different numbers. It is easy to control, and furthermore, it is possible to provide the synchronized clock signal with no pulse in one vertical scanning period of the video signal, and to provide (non-clock period T) l:= (same 1y1).
Set the maximum clock period of the tarok signal to 1 "CM),
Since the structure is configured to establish frame synchronization from the detection of this no-clock period T, the synchronization [1 word cycle (1 word period)] Even if there is slight variation, frame synchronization can be achieved reliably with a simple structure. I like it.

[Brief explanation of the drawing]

FIG. 1 is a block system diagram of an embodiment of the present invention, and FIG. 2 (
△) to (1-1'') are A38 timing charts for explaining the operation of the present invention. 1... Disc player body, 101... Disc, 103... (S month) Processing unit, 104F...FM high frequency signal output terminal, 104.v, 4v...Video signal output terminal, 1.04, 104R, 14+-, 4R...Audio signal output terminal, 107...System Control section, 107a...Sword detection circuit, 107b...Status information generation circuit, 111...Address signal demodulation section, 112...External device 18 connection width H completed, 2...Interface section, 3... External control 211 equipment, 4...
・Agbook section, 4D... Reproduction data output terminal.

Claims (1)

Claims: (1) Signal processing for reproducing and signal processing an information recording medium on which main information and address information indicating the recording position of the main information are respectively coded and recorded. an address information demodulation section that demodulates the signal from the Iz code processing section to extract the address information; and an address information demodulation section that demodulates the signal from the Iz code processing section and extracts the address information; a control unit that controls the reproduction of main information for a predetermined period in a predetermined playback mode based on a control unit that switches between a mode in which the address information demodulation unit is put into a non-operating state and takes in the address information from the address information demodulation unit, and a mode in which the address information demodulation unit is put in an inactive state and the address information taken out from the external device is taken in; A status information generating unit that outputs status information indicating the type of information recording medium to be loaded and the playback state of the information recording medium to the external device, and each information of the address information, command information, and status information. An information recording medium reproducing apparatus characterized in that the information recording medium is configured such that data is transferred between each device and each part using one type of synchronized clock signal. (2) The main information is a video signal, and the address information, command information, and status information are composed of the same plurality of bits with one vertical scanning period of the video signal as one unit. Tozuru Koma W [information recording medium reproducing device according to claim 1. (3) The main information is a video signal, and the address information, command information, and status information are the video 1 (M number 1).
The synchronized clock signal is composed of a plurality of identical bits with a vertical scanning period as one unit, and the synchronized clock signal is provided with a non-clock period T in which there is no pulse in one vertical scanning period of the video signal, (the non-clock period T) >(maximum clock period TcM of the synchronization clock signal), and frame synchronization is achieved by detecting the non-clock period. 1. The information recording medium reproducing device according to item 1, scope of IR crystallization.