JPS6041021Y2 - digital disk device - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a digital audio signal writing device using a magnetic disk device, etc., and is particularly applicable to a plurality of disk devices when operating in parallel. The present invention relates to a digital disk device that is provided with a plurality of spot address memories and track and head collation memories and that outputs a comparison between the number of empty channels in these memories and the number of tracks of data to be written.

[Conventional technology]

Traditionally, at broadcasting stations, the audio processing of commercials (hereinafter referred to as CMs) has been carried out several days before the day when the commercials are actually broadcast, by putting them on air using a single tape in the order of transmission, or by processing the sound of commercials using multiple tapes. CMs are recorded in cartridges, and a large number of these cartridges are automatically selected to emit the CMs.

However, the former case has the disadvantage that it takes a lot of time and effort to combine many commercials into one magnetic tape.

In the latter case, the number of playback machines and cartridges, as well as the installation space for the 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 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.

[Problem that the invention attempts to solve]

As the above-mentioned CM sending system, the present applicant has proposed a digital disk device that digitizes analog signal data, records it on a disk, accesses the data on the disk, and retrieves the same CM data as if it had been unified.

However, in this digital disk drive, if only one large-capacity memory is used, access time for writing or reading increases as the CM data capacity increases.In addition, the data capacity of users varies. In many cases, it was better to use multiple relatively small-capacity digital disk drives.

For this reason, when a plurality of digital disk drive devices are operated in parallel, spot address memories and track and head memories corresponding to the plurality of digital disk drive devices are provided.

Thinking about writing data and addresses to memory like this, initially the disk is all empty, so data and addresses can be written sequentially, but once the addresses etc. written to memory are full, then When rewriting, the state of empty memory and empty tracks becomes random, and when writing new, for example, long data, the disk may become full during recording depending on the address specification.

[Means for solving problems]

The present invention was developed in view of the above-mentioned drawbacks, and is designed to scan the track or head number memory as well as the spot address number memory, count the empty memory, and extract the output by comparing the counted number with the number of data tracks. The means for this purpose is to operate a plurality of sets of digital disk drive devices in parallel, and in a part of each disk, there is an address storage area for storing a spot address number and an address corresponding to the number of data tracks consisting of track and head numbers. A data storage area for storing data is provided, and a spot address number memory for storing spot address numbers in the address storage area, and a track and head number memory for storing track and head numbers are provided in the plurality of digital disk drives. Correspondingly, when writing data and addresses, the number of tracks corresponding to the write data length is compared with the number of free memories in the spot address number memory, and an address matching the write data length is specified. Distantly related to digital disc devices featuring

〔Example〕

An embodiment of the present invention will be described in detail below with reference to FIGS. 1 to 10.

FIG. 2 is an overall system diagram of the digital disk system of the present invention. In this example, analog signal data is applied to the input terminal 3a of the data processing section 3, converted from analog to digital, and sent to the write/read control section 4. is input.

The spot address number (hereinafter referred to as 5PAD) output from the central control unit 1 when writing the CM data of the write/read control unit 4 onto a magnetic or optical disk 6 is transferred to the disk control unit 2, and this disk control unit Search for an empty track in the memory provided in the section 2, control the write or read control section 4 with its output, put the disk 6 in a writing state with the output, and write CM data and 5PAD on the disk 6 using the head 7. .

Also, at the time of reading, the 5Ps instructed by the central control unit 1
The AD controls the disk control section 2, uses its output to control the write or read control section 4, searches for CM data corresponding to 5 PAD from the track of the disk 6, forces the head 7 to read it, and reads it out. The data is sent to the data processing section 3 via the write/read control section 4, where it is digital-to-analog converted and taken out from the output terminals 3d...3c.
It will be aired as analog commercial data.

Note that reference numeral 5 is a motor that drives the disk 6.

Details of the data processing section 3 mentioned above will be explained with reference to FIG.

The CM analog signal input to the input terminal 3a is supplied to the analog-to-digital conversion circuit 3d, where it is converted into a digital signal and sent to the first memory via the first switch SW□ as a continuous data output. It is supplied to circuit 3e and written there.

In this case, the capacity of the first memory circuit 3e, which will be described later, should be such that it can store the time T corresponding to one track of the disk 6.

If the actual broadcast time of the commercial is the actual time obtained by multiplying the track time T, then switch the contact piece on the contact a side of the first switch SW1 from the contact side to the contact C side. Second
If you store one track's worth of CM data in the memory 3f of the switch SW, and if it is possible to store the data for less than the specified time, move the contact piece of the contact a of the first switch SW to the contact side. The data is stored in the first memory 3e.

This kind of switching is repeated alternately.

While the first switch SW1 is storing CM data in the first memory 3e, the contact piece of the contact a of the second switch SW1 is connected to the contact C of the second memory 3f, and the second switch SW1 is connected to the second switch SW1. The data stored in the memory 3f is read out and the output thereof is applied to the write amplification circuit 4a of the write/read control section 4.

In order to read the CM data from the above-mentioned memory, when data is written to the first and second memories 3e and 3f in T seconds of real time, if this time is compressed to t seconds, then Note that in these first and second memories, data is time-compressed with a ratio of t/T.

In this way, the time-compressed data is transferred to the switcher 40.
heads on different disks or tracks on disk 6 via? a, 7bt 7c,? a.

7e,? Recording is performed by a head 7 composed of f.

At the time of reading, the head 7 reads the data of time t compressed and recorded on the disk 6, and the output is sent to the third switch via the switcher 40, the read amplification circuit 4b and the third switch SW3. In addition to the memory 3g of No. 3, this output is sent as analog data to the output terminal 3b via the fourth switch SW and the digital-to-analog conversion circuit 31.

The output has a plurality of lines 3b to 3C as shown in FIG.

Similarly to writing, the third and fourth memories 3gy3h
every T time, the third and fourth switches SW3. SW,
Writing and reading are performed by switching alternately, and when reading, the data is expanded and read, so that when reading, the time is expanded by the ratio of T/l.

The digital commercial data used for this invention is on disk 6.
The format for recording above is shown in FIGS. 4 and 5.

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 audio and other data is taken on the inner periphery.

As shown in FIG. 4, the address storage area 8 is provided with n sectors radially divided into n equal sectors on the surface of the disk 6 as indicated by broken lines passing through the center of the disk.

In reality, the sector is divided into 64 equal parts (FIG. 4 shows the case where it is divided into 8 equal parts).

As shown in FIG. 5A, a plurality of concentric tracks in the address storage area 8 are provided with index signals (hereinafter referred to as [)1. ID2...
) is added, followed by track and head numbers (SCAD□, 5
CAD2...5CADn) is added.

This number of 5 CAD corresponds to the number of tracks when the length of one CM is stored in the data storage area for each track.

Furthermore, one CM is placed in one sector part of the address storage area 8.
If the length of CM is long and the number of data tracks is too large to fit 5 CAD, a NEXT signal is written at the end indicating that the next sector is to be continued, and the next sector is also read. When the end signal is recorded at the end of the sector, it is possible to know whether the combination of one text data track number for searching within one sector has ended or whether it continues in the next sector. I can do it.

The above-mentioned 5CAD indicates the heads 7a to 7f corresponding to each of the plurality of disks 6 arranged on the rotating shaft of the motor 5, and the tracks of the disks that are in contact with each head.

Furthermore, in the data storage area 9, one of the 5CAD and 5PAD recorded in the sector in the address storage area is recorded.
D, and #5PAD starts from any same point on each of the plurality of data tracks and starts from the same point as shown in FIG. 5B.
5CAD1-5CADn for each track and 5PAD of CM
Of 1 to 5 PADo, corresponding 5 CAD and 5 PAD are recorded, and CM data 10 is recorded for one track.

Now, if the total time of CM is L and the time for one track is T, then the required number of tracks n is n=〒 pieces.

That is, one CM is composed of n pieces of 5CAD1 to 5CADn.

To read data from such a disk, read 5CAD from the address storage area 8 using the 5PAD of the CM transferred from the central control unit 1, and according to this 5CAD, as shown in FIG. 5B, for example, 5CAD□. The corresponding CM data 10 is read out for one track.

Such operations are sequentially performed for the next 5CAD2 to 5CADn.

The configuration of the 5PAD transferred from the central control unit 1 is, for example, 16 binary bits, the O to 6 bits are indexes ID1 to IDn representing the sector, the next 5 bits are the head number, and the next 2 bits are the multiple recording/reproducing data. A mechanical number indicating which mechanism in the device is to be driven is recorded, and a line number indicating the data line to be sent out is recorded in the next three bits.

In such a format of the disc 6, 5PAD verification and the like in the disc control unit 2 shown in FIG. 2 will be explained with reference to FIG.

Command data from the central control unit 1 is added to the memory operation control unit 2a for controlling the memory, and the output of the memory operation control unit 2a is sent to the 5PAD memory 2b1S.
The CAD memory 2c and empty memories 2d to 2n are input.

With this configuration, when the device that drives the digital disk 6 of the present invention is in the ON state, the motor 5 starts rotating, and the head 7 reads the address storage area 8 of the disk 6 and records data on the disk 6. Set the current 5PAD in the 5PAD memory 2b.

Furthermore, the 5CAD being used is set in the 5CAD memory 2C.

Next, when a predetermined 5PAD instruction is issued from the central control unit 1, the instruction 5 is again issued in the address storage area of the disk 6.
Read the ID of the sector corresponding to PAD, and
Data 10 is read by moving the head 7 to a predetermined track position based on the CAD data.

Next, considering writing, when the system is powered on, the head 7 scans all sectors of the address storage area 8 of the disk and writes 5PA as in the case of reading.
If 5CAD is written in the old address corresponding to D, the address is already in use, so these 5PADs are set in the 5PAD memory 2b.

Similarly, set 5CAD (used track) on the disk used in the 5CAD memory 2c.

Next, an address instruction to be written, that is, a 5PAD instruction, is issued from the central control unit 1, and the 5PAD memory 2b is searched in accordance with the instruction.

If it is in use, the sector corresponding to the address instruction in the address storage area 8 of the disk 6 is read.

Also, I searched the 5CAD memory 2C and found that it was not recorded.
If there is a CAD, set it to empty memories 2d to 2n.

As shown in FIG. 7, the contents of the empty memories 2d to 2n are as shown in FIG.
Insert n pieces of CAD for the length L of the CM, and insert the last 5 CAD.
Set the NEXT or END signal after An to 5CADNn.

The details of the read/write circuit for the address storage area 8 described above will be further explained with reference to the circuit and time chart of FIGS. 8 and 9.

When the system starts up, that is, the power supply is in the 1-on state, a command from the central control unit 1 instructs 5 PAD, is written to the address register 11, and when a read command is issued to the address storage area 8 of the disk 6, the 9th Looking at the P-P section of the selector pulse signal created by mechanically dividing the circumference of the disk as shown in Figure B, the signal from the sector of address storage area 8 is as shown in Figure 9A.This signal is readable. The signal is applied to the detection circuit 13 from the head 7 via the amplifier 12, and the command signal from the address register 11 is also supplied to the detection circuit 13. A coincidence of the IDs from the head 7 shown in FIG.
Write 5PAD and 5CAD1 to 5CADn from the disk 6 into the empty memory 2d.

Also, in order to write 5PAD and 5CAD written in the empty memory 2d to the address storage area of the disk 6, as shown in Figure 9, during the write waveform (WR) period, after the detection circuit 13 detects ID matching, the output is , via the amplifier 14,
is supplied to the head 7.

As a result, 5PAD and 5 of empty memory 2d are transferred to disk 6.
Write CAD into address storage area 8.

It is assumed that the ID is formatted at the beginning of use of this system.

Further, in the data storage area 9, a 5CAD address is placed in the address register 11 of FIG. 8, and a match is detected by the detection circuit 13 based on the reproduced signal of a predetermined track.

In the present invention, a magnetic disk drive device consisting of the motor 5 and the disk 6 head 7 shown in FIG.
c, 15d, and these magnetic disk reproducing devices 15a, 15b.

a plurality of address matching memories 2b corresponding to 15c and 15d;
, 2b2. 2)) at 2b4. 2114 also track and head verification memory 2C192C292C
3t 2C4? 2C5 is set to empty memory 2d to 2n
As shown in FIG. 6, there is only one.

When writing spot addresses corresponding to the length of 1CM in sectors of the disk with such a configuration, since the initial state is empty, writing is performed sequentially, and at that stage, the 5CAD and 5PAD memories are becomes full, but when rewriting is performed after that, the status of empty tracks on each disk becomes different, and the empty positions of the 5CAD and 5PAD memories are also random.

In this state, for example, when relatively long CM data is newly written, there is a problem in that the disk becomes full during the writing process.

Therefore, in the present invention, the CM to be written is detected by scanning the empty spaces of multiple 5PAD and 5CAD memories.
Compare this with the time shown below and be advised to specify 5 PAD and 5 CAD of a writable disc.

An embodiment for this purpose will be described with reference to FIG. 1. The 5 CAD memories 2C1 to 2cis and the 5 PAD memories 2b1 to 2 clusters are sequentially scanned by the switch means SW6.
The AD number and the room number in 5CAD 2 b1 to 2 are countered and added to the comparison circuit 16, while the central control unit 1
If L is the actual time of the CM to be recorded based on the command from the next generation, compare it with the count of the required number of tracks n = 〒, and if recording is not possible, search for a recordable part from other collation memories, The information is recorded in that portion, and if necessary, a display device or alarm device 17 is used to warn or display that the information has been recorded on another disk or collation memory that does not correspond.

[Effect of idea]

Since the present invention is constructed as described above, when the address storage area information of the disk 6b is read by the 5PAD instruction, for example, from the disk playback device 15b, and the address storage area information of the disk 6b is compared with the 5PAD memory and the 5CAD memory, the 5PAD memory 2h and the 5CAD memory 2C2 are compared. Since it is only necessary to compare data with Even if the number of drive devices to be operated in parallel varies, it is sufficient to arrange the 5 PAD memory 2b and 5 CAD memory corresponding to the number, and even if the order of data written to the disk is random, data will not be lost in the middle. The practical effect of being able to provide an uninterrupted digital disk device is great.

[Brief explanation of drawings]

Figure 1 shows the digital disk device of the present invention, 5PAD,
5 A system diagram of a comparison means for comparing the time of CAD memory and write data, FIG. 2 is an overall system diagram of the present invention,
FIG. 3 is a system diagram of the audio data processing section and read/write control section shown in FIG. 2, FIG. 4 is a plan view of the disk for explaining the data format used in the present invention, and FIG. 5A
and B are explanatory diagrams of data recorded on the disk, FIG. 6 is a system diagram of the disk control unit, FIG. 7 is an explanatory diagram of the inside of the 5CAD memory, and FIG. 8 is an explanatory diagram of the address storage area and data storage area of the disk. A system diagram for explaining reading and writing, FIG. 9 is a waveform explanatory diagram of FIG. 8, and FIG. 10 is a disk 6 drive device and 5 PAD. It is a system diagram showing an empty memory similar to 5CAD. DESCRIPTION OF SYMBOLS 1...Central control unit, 2...Disk control unit, 3...Data processing unit, 4...Reading/writing control unit, 6... ...Disc, 11
...Address register, 13...Detection circuit, 15a-15d...Magnetic disk drive, 16...Comparison circuit, 17... Display device or alarm device.

Claims (1)

[Scope of utility model registration request] A spot address number is attached to a part of each disk that allows multiple sets of digital disk drives to be operated in parallel.
An address storage area for storing addresses corresponding to the number of data tracks consisting of track and head numbers and a data storage area for storing data are provided, and a spot address number memory in the address storage area and a track for storing track and head numbers. and head number memories are provided corresponding to the plurality of digital disk drive devices, and when writing data and addresses, the number of tracks corresponding to the write data length is compared with the number of free memories in the spot address number memory, and the number of tracks corresponding to the write data length is compared to determine the write data. A digital disk device characterized in that an address suitable for the length is specified.