JPS6053389B2 - digital disk - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention records digital signals using a magnetic disk.
Relating to a digital disc suitable for use in a playback device,
In particular, the present invention relates to a digital disc in which a number of tracks and head numbers are recorded according to the length of data such as audio data.

[Conventional technology]

Conventionally, at broadcasting stations, etc., audio processing for commercials (hereinafter referred to as CMs) has been carried out by putting them on air using a single tape in the transmission order several days before the actual broadcast and sending out the CM, 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]

In the conventional processing described above, in the former case, there is a drawback that it requires a lot of time and effort to combine many commercials into one magnetic tape, and in the latter case, the playback equipment and cartridge The disadvantage is that the number of devices and the installation space for equipment are enormous, and there are many problems in terms of reliability.

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 from the viewpoint 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 was developed in view of the above-mentioned drawbacks, and is suitable for use in disks for CM sending systems. Using a disk, the commercial to be aired is converted from analog to digital and recorded, and the commercial data recorded on this large-capacity magnetic disk is read out, and the format of the magnetic disk at that time is set to the length of the commercial data. There is a digital disk in which track and head numbers are recorded on the disk correspondingly, and the means for doing so is to record data in this data storage area by using a part of the track range of the disk as a data storage area, and to record data in this data storage area. A part of the track range of is used as an address storage area, and addresses corresponding to the track and head numbers are recorded in this address storage area, and this address is the same number as the number of tracks according to the data length, and is recorded for each sector of the track. The data is recorded on a digital disc by aligning address positions recorded at the beginning of each track in the radial direction of the disc.

〔Example〕

Hereinafter, an embodiment of the digital disc according to the present invention will be described in detail with reference to FIGS. 1 to 6.

A preferred CM-delivery system using the digital disc of the present invention is generally shown in FIG.

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 the 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. ,
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 put into a write state, and the head 7 writes CM data and SPAD onto the disk 6. Also, when reading, the SPAD instructed by the central control unit 1
The disk control section 2 is controlled, and the output thereof controls the write/read control section 4, and the SP from the track of the disk 6 is controlled.
The CM data corresponding to the AD is searched and read out by the head 7, and the read data is sent to the data processing section 3 via the write/read control section 4, where it is digital-to-analog converted and converted into analog data. The CM signal is taken out from the output terminals 3b...3c and the CM is broadcast on the air. In addition, the code 5 is the a disk 6
This is the motor that drives the. Details of the data processing section 3 mentioned above will be explained with reference to FIG. 2.

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, 3f in T seconds of real time, if this time is compressed to t seconds, the data in both memories 3e, 3f will be written in t/t seconds. This means that the time is compressed by the ratio of 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. Third and fourth memories 3g and 3
h is written alternately.

Each memory 3g, 3h is read out alternately every T time,
A fourth switch SW4 and digital-to-analog conversion circuit 3 are switched in conjunction with the third switch SW3, similar to the first and second switches SW2 and SW2 described above.
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 64 equal parts (FIG. 3 shows the case where it is divided into 8 equal parts). As shown in FIG.
is added, followed by a track and head number signal (hereinafter SCADl, SCAD) representing the track and head number.
2...SCAD. ．． ) are added sequentially.

This SC7V) has heads 7a to 7 that respectively correspond to a plurality of disks 6 arranged on the rotating shaft of the motor 5 in FIG.
f and indicates the track of the disk adjacent to it. Furthermore, in the data storage area 9, the above-mentioned index signals 1D1 and ID are stored in a plurality of tracks.
2... respectively correspond to the SPADs mentioned above, and the 4th
As shown in Figure B, SCAD1 to SCAD for each track
n<15CM (:I) Record the applicable SCAD and SPAD among SPADl to SPNχ, and record the CM data 1
Record 0.

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

That is, one commercial. It is composed of data of tracks labeled SCAD1 to SCADn. When reading,
SCA is sent from the address storage area 8 using the CM spot address number SPAD transferred from the central control unit 1.
D, and according to this SCAD, as shown in FIG. 4B, for example, one track of CM corresponding to SCAD1 is
Read data 10.

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 2C1 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 D in the SPAD 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.

D” of each sector corresponding to SPAD followed by SCAD
If the address is recorded, that address is in use, so if such an in-use SPAD is
memory 2b. Similarly, the SC in use
ADi! -Set in the SCAD memory 2c. At this stage, the address to be written from the central control unit 1, that is, S
When a PAD 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 2d above
~2n contents include SPA at the first address as shown in Figure 6.
Set Dl~SPADn, then CM SCAD
n individuals by the length L, the last SCADAn-SC
After ADNn, NEXT/END marks are set.

〔Effect of the invention〕

Since the present invention is configured as described above, if the time required for CM data to be recorded on the disk 6 is L, and the time to be recorded on the track is T, then L/T tracks and heads are required. The numbers SCADl to SCADn are
For example, 8 tracks are stored in the address storage area 8 from the outer periphery of the disk 6, so when the power is cut off, the S in the address storage area is stored in a specially prepared memory.
There is no need to evacuate C and AD, and the system can be configured economically.

[Brief explanation of drawings]

FIG. 1 is a system diagram of an apparatus using a digital disk according to the present invention, FIG. 2 is a system diagram of the data processing section and read/write control section of FIG. 1, and FIG. 3 is a plan view of an embodiment of the present invention. , FIGS. 4A and 4B are explanatory diagrams of data recorded on the disc, FIG. 5 is a system diagram of the disc control section, and FIG. 6 is an explanatory diagram of the contents of the empty memory. In the figure, 1 is a central control unit, 2 is a disk control unit, 3 is an audio data processing unit, 4 is a read/write control unit, 6 is a disk, 8 is an address storage area, 9 is a data storage area, and SPAD is a spot The address number, SCAD, 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 addresses corresponding to track and head numbers are recorded in the address storage area, and the addresses are the same as the number of tracks corresponding to the length of the data. 1. A digital disc characterized in that the data is recorded in each sector of a track, and the address positions recorded at the starting point of each track are aligned in the radial direction of the disc. 2. Claim 1, wherein L/T track and head numbers are recorded in the address storage area, where L is the required time for the data and T is the time for the data to be recorded on one track. section digital disc.