JPS6053390B2 - digital disc device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for recording and reproducing digital data using a digital disc.

[Conventional technology]

Conventionally, at broadcasting stations, audio processing for commercials (hereinafter referred to as CMs) has been carried out by putting the commercials on air several days before the day they are actually broadcast on a single tape in the transmission order, or by using a large number of cartridges. CM is recorded in the cartridge, and a large number of these cartridges are automatically selected and the CM is sent out.

[Problem that the invention seeks to solve]

However, in the former case, there are many commercials on one magnetic tape.
The disadvantage is that it takes a lot of time and effort to unify the cartridges into one, and in the latter case, the number of playback devices and cartridges, as well as the space for installing the devices, becomes enormous, and there are many problems in terms of reliability. There are drawbacks.

Furthermore, since CM, which is audio information recorded on tape or the like, records analog signals, the S/N ratio deteriorates due to repeated dubbing, and care must be taken in handling in terms of maintenance.

Therefore, there has been a demand for a CM sending system that can avoid such complicated administrative work and the use of a large number of equipment as much as possible.

[Means for solving problems]

The present invention provides a CM sending system that eliminates the above-mentioned drawbacks.The present invention is characterized by the use of a large-capacity magnetic disk used as external memory for computers, etc. The commercials to be aired are converted from analog to digital and recorded, and the commercial data recorded on this large-capacity magnetic disk is read out. When the system comes into operation, it is stored in the address storage area of the disk. The method is to read out the recorded spot address numbers and addresses such as head and track numbers and store them in the memory within the system, and create a head number based on the addresses stored in this memory. A part of the disc is used as a data storage area and data is recorded in this data storage area, and a part of the other track range of the disc is used as an address storage area and the index number corresponding to the spot address number and track and The address corresponding to the head number is recorded, and during operation, the address is read from the address storage area and stored in the spot address number and track and head number memories, respectively, and the spot address number and track and head number memories are stored in the central control unit. When the specified spot address number, track and head number are retrieved based on the spot address instruction from the disk, the specified spot address number, track and head number are read out from the address storage area of the disk, and this reading This is achieved by a digital disk device that reads data from a predetermined track in a data storage area based on the issued spot address number and track and head numbers.

〔Example〕

Hereinafter, an embodiment of a digital disk device according to the present invention will be described in detail with reference to FIGS. 1 to 8.

FIG. 1 shows the overall configuration of an embodiment of the present invention.

In FIG. 1, an analog CM signal is supplied to an input terminal 3a of a data processing section 3, and CM data subjected to analog-to-digital conversion is input to a write/read control section 4. When writing the CM data of this write/read control section 4 onto the magnetic disk 6, the spot address number (hereinafter referred to as SPAD) output from the central control section 1 is transferred to the disk control section 2.
At this point, an empty track on the disk 6 is searched, and the output of the disk control section 2 controls the write/read control section 4, and the control section 4 is set to the writing state, and the head 7 reads the CM.
Write data and SPAD onto disk 6. Also, at the time of reading, SP and AD instructed by the central control unit 1
controls the disk control section 2, controls the write/read control section 4 with its output, searches for CM data corresponding to SPAD from the track of the disk 6, performs reading by the head 7, and reads out the read data. is sent to the data processing unit 3 via the write/read control unit 4, where it is digital-to-analog converted and taken out as an analog CM signal from the output terminals 3b...3c, so that the CM can be aired. Ru. Note that reference numeral 5 is a motor that drives the disk 6. The above data processing section 3
The details will be explained with reference to FIG.

The analog CM signal input to the input terminal 3a is supplied to the analog-to-digital conversion circuit 3d, where it is converted into digital data, and is sent to the first memory via the first switch SWl as continuous data output. It is supplied to circuit 3e and written there. In this case, the first memory 3e has a capacity that can store a time T corresponding to one track of the disk 6, which will be described later. Now, if the actual broadcast time of a CM is the real time L, which is obtained by multiplying the time T for one track on the disk 6, after the time T has elapsed, the movable contact a of the first switch SWl is The second memory 3f is switched to a state opposite to that shown and connected to the contact c.
One track's worth of CM data is written to. Furthermore, if only a time less than the time L can be stored in the memory, the movable contact a of the first switch SWl is connected to the contact b side again, and the data is written in the first memory 3e. Repeat switching alternately. The second switch SW2 is
C to the first memory 3e via the first switch SWl.
While the M data is being written, the movable contact piece a is connected to the contact c on the second memory 3f side, and the second memory 3
The data stored in f is read out and applied to the write amplification circuit 4a of the write/read control section 4.

When reading the above-mentioned CM data, when data is written to each memory 3e and 3f in T seconds of real time, if this time is compressed to t seconds, then in both memories 3e and 3f,
This means that the data is time-compressed at a ratio of t/T. In this way, the time-compressed data is recorded on different disks or tracks on the disk 6 by the heads 7, 7a to 7f via the switcher 4c. The time-compressed CM data recorded on the disk 6 is read out by the heads 7a to 7f and applied to the readout amplifier circuit 4b via the switcher 4c, and the output of this amplifier circuit 4b is outputted by the third switch SW3. The data is written alternately to the third and fourth memories 3g and 3h.

Each memory 3g, 3h is read out alternately every T time,
Like the first and second switches SWl and SW2 described above, a fourth switch SW is switched in conjunction with the third switch SW3, and the digital-to-analog conversion circuit 3
1 and sent to the output terminal 3b as an analog signal. In the third and fourth memories 3g and 3h described above, the time-compressed data is time-expanded at a ratio of T/t. A format for recording digital CM data on the disc 6 used in the present invention is shown in FIGS. 3 and 4.

Several tracks inward from the outer periphery of the disk 6 are taken as an address storage area 8 for storing addresses, and following this address storage area 8, a data storage area 9 for storing data such as audio is taken on the inner periphery. As shown in FIG. 3, the address storage area 8 is composed of n sectors radially divided into n equal parts on the surface of the disk 6 by a broken line (imaginary line) passing through the center thereof. This sector is actually divided into eight equal parts (FIG. 3 shows the case where it is divided into eight equal parts). As shown in FIG. 4A, the plurality of concentric tracks in the address storage area 8 are provided with index signals (hereinafter referred to as n) 1, ID2, . . . indicating the starting point of each sector for each sector. After that, a track and head number signal (hereinafter SCAD1, SCAD2) indicating the track and head number is added.
. . . SCADn) are sequentially added.

This SCAD has heads 7a to 7f each corresponding to a plurality of disks 6 arranged on the rotating shaft of the motor 5 in FIG.
This indicates the track on the disk that is in contact with this. Furthermore, in the data storage area 9, the above-mentioned index signals 1D1 and ID2 are stored in a plurality of tracks.
. SCADl~SCADn
and CM (7) Among SPADl to SPADn, the corresponding SCAD and SPAD are recorded, and data 10 of the CM is recorded.

Now, if the total time of CM is L, the required number of tracks n is n=L/T.

That is, one CM is composed of data of n tracks labeled SCAD1 to SCADn. At the time of reading, the SC is read from the address storage area 8 according to the spot address number SPAD of the CM transferred from the central control unit 1.
AD is read, and according to this SCAD, as shown in FIG. 4B, for example, one track worth of CM data 10 corresponding to SCAD1 is read out.

Such reading is also performed sequentially for SCAD2 to SCADn, which will be described later. Next, spot address verification and the like in the disk control section 2 of FIG. 2 will be explained with reference to FIG. 5 as well.

Commands from the central control unit 1 are applied to the memory scan control unit 2a, and the output of this memory scan control unit 2a is sent to the SPAD.
Memory 2b, . SCAD memory 2c, empty memory 2d
~2n is input.

With such a configuration, when the CM sending system using the digital disk of the present invention is powered on and enters the operating state, the head 7 scans all sectors of the address storage area 8 of the disk 6 and writes data there. Recorded SPAs
Set in D7l2SPAD memory 2b.

Furthermore, the SC of the track where CM data is already stored
Set AD in the SCAD memory 2c. At this point, when a predetermined SPAD instruction is given from the central control unit 1,
The head 7 scans the address storage area 8 of the disk 6 again and determines the ID of the sector corresponding to the specified SPAD.
and the SCAD following this.

Based on this read SCAD, the head 7 is moved to a predetermined track position on a predetermined disk, and data 10 is read out. When writing CM data, once the system is in operation, the head 7 scans all sectors in the address storage area 8 of the disk 6, as in the case of reading.

If an SCAD is recorded following D in each sector corresponding to a SPAD, that address is in use, and such a SPAD in use is set in the SPAD memory 2b. Similarly, the SCA in use
Set D in the SCAD memory 2c. At this stage,
Address to be written from central control unit 1, i.e. SPAD
When this instruction is given, the memory operation control section 2a searches the SPAD memory 2b in accordance with this instruction.

As mentioned above, the SPAD memory 2b stores the SP in use.
Since AD is set, whether or not the designated address is being used can be quickly determined without reading out the address storage area 8 of the disk 6 one by one. If the designated address is unused, the ID (=SPAD) of the sector corresponding to the designated address in the address storage area 8 of the disk 6 is set in the empty memories 2d to 2n. Also, by searching the SCAD memory 2c,
Similarly, if there is an unused SCAD, that SCAD is set in the empty memories 2d to 2n. Empty memory 2 above
The contents of d to 2n are as shown in Figure 6, with SP at the first address.
Set ADl~SPADn, then set SCAD to C.
n individuals for the length L of M, the last SCADAn-S
After CADNn, NEXT/END marks are set.

The details of the read/write circuit for the above-mentioned atto-V storage area 8 will be further explained with reference to the circuit and time chart of FIGS. 7 and 8.

When the power is turned on and the device enters the operating state, the command addresses SP and AD from the central control unit 1 are written in the address register 11, and when a read command for the address storage area 8 of the disk 6j is issued, the disk It is made by mechanically dividing the periphery of 6.

The address signal read from the track of the address storage area 8 in the sector pulse p-p interval as shown in FIG. 8B becomes as shown in FIG. 8A, and this address signal is
is added to the detection circuit 13 via the amplifier 12, and
Since the command signal from the address register 11 as shown in FIG. 8B is also supplied to the detection circuit 13, this detection circuit 1
3 is the address signal SPAD and the command signal SP, AD
A match is detected, and this detection output causes the switch SW to
5 as one end, as shown in FIG. 8C, during the read pulse RE period until the next sector pulse p, the S
Write PAD, SC, ADl to SCADn into empty memory 2d. Further, in order to write SPAD and SCAD written in the empty memory 2d to the address storage area 8 of the disk 6, as shown in FIG. ,
The signal is supplied to the head 7 via an amplifier 14. As a result, SPAD (=ID) and SCAD can be written from the empty memory 2d to the address storage area 8 of the disk 6. Also, writing/reading to the data storage area 9 is as follows.
The SC, /V) address may be placed in the address register 11 in FIG. 7, a match with a predetermined track is detected by the detection circuit 13, and then data may be exchanged with the data storage area 9.

In addition, SP. The AD is formatted at the initial stage of use of the device. [Effects of the Invention] Since the present invention is configured and operated as described above, when the device starts operating, that is, when the power is turned on, the track in the address storage area is read and the track and head number verification data is read. Since the SPAD and SCAD are set in the SCAD memory of the disk, it is extremely easy to check when writing data.Since the SPAD and SCAD are recorded on the disk, it is necessary to save the SCAD to a specially prepared memory even when the power is cut off. There is no.

[Brief explanation of the drawing]

FIG. 1 is a system diagram of an embodiment of a digital disk device according to the present invention, FIG. 2 is a system diagram of the audio data processing section and read/write control section of FIG. 1, and FIG. 3 is a data format used in the present invention. 4A and B are explanatory diagrams of data recorded on the disc, FIG. 5 is a system diagram of the disk control unit, and FIG. 6 is an explanatory diagram of the contents of empty memory. FIG. 7 is a system diagram for explaining reading and writing of the address storage area and data storage area, and FIG. 8 is a waveform explanatory diagram of FIG. 7. In the figure, 1 is the central control unit, 2 is the disk control unit, and 2b
is a spot address number memory, 2c is a track and head number memory, 3 is an audio data processing section, 4 is a read/write control section, 6 is a disk, 8 is an address storage area, 9 is a data storage area, 11 is an address register,
13 is the detection circuit, SPAD is the spot address number, S
CAD is the track and head number.

Claims (1)

[Claims] 1. A part of the track range of the disk is set as a data storage area, and data is recorded in the data storage area,
A part of the other track range of the disk is used as an address storage area, and an index number corresponding to the spot address number and an address corresponding to the track and head numbers are recorded in the address storage area, and during operation, the address is transferred from the address storage area to the address storage area. is read out and stored in a spot address number memory and a track and head number memory respectively, and the spot address number memory and track and head number memory are searched based on a spot address instruction from the central control unit, and the indicated spot address number is read out. And when the track and head numbers are retrieved, the specified spot address number and track and head numbers are read from the address storage area of the disk, and based on the read spot address numbers and track and head numbers. . A digital disk device, characterized in that data is read from a predetermined track in the data storage area. 2. When the specified spot address number and track and head number are not retrieved from the spot address number memory and track and head number memory, storing the specified spot address number and track and head number in an empty memory; 2. A digital disc device according to claim 1, wherein information is recorded in an address storage area of said disc.