JPH065052A - Magnetic recording/reproduction device - Google Patents

Abstract

PURPOSE:To obtain a device which can read a plurality of pack items or a pack with one sub-code reading operation in an R-DAT. CONSTITUTION:When reading a pack item stored in a storage means, a specified content is decoded from a control containing the specified content of the pack item which is output from a control circuit 1 and a block address is specified by a retrieval control means 3 corresponding to the specified content. By referring to the specified block address, a sequence data is read from a storage means 7 and a pack item is detected by a pack item retrieval means 9 and is output to the control circuit 1. When a plurality of specified contents are included in a control data, the decoded specified contents are stored in an auxiliary storage means 11 and the stored specified content is output to the retrieval control means 3 in sequence every time the above reading operation is performed, thus reading the pack items of all packs recorded in a plurality of block addresses.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary head type magnetic recording / reproducing apparatus for recording / reproducing an audio signal or the like in the form of a digital signal using a rotary head, and more particularly to reading sub data. is there.

[0002]

2. Description of the Related Art There is R-DAT for recording / reproducing audio signals in the form of digital signals. Figure 7 shows R-DA
This shows the recording track format of T, and the recording track is divided into seven areas. In the central PCM area, a PCM audio signal is recorded, and a PCM ID representing the sampling frequency quantization bit number and the like is recorded. On both sides of the PCM area, there are ATF areas in which servo signals for tracking servo are recorded, sub-data areas SUB1 and SUB2 are recorded outside them, and margin areas are recorded at both ends of the recording track. . Each of the sub data areas SUB1 and SUB2 has 8
A sub data block of the block is recorded, and each sub data block has a block address of 0 to F (S
UB1 is 0 to 7, and SUB2 is 8 to F). A sub data block of an adjacent even block address and an odd block address that is one higher than that has a structure as shown in FIG. 8, and the sub data includes 8-symbol data called a pack as shown in FIG. Seven (pack area 1 to pack area 7) and error correction code C1 are recorded. Top 4 of the first symbol (PC1) of each pack
In the bit, a pack item indicating the contents of the pack is recorded.

Next, a conventional technique will be described with reference to FIG. Conventionally, when reading a pack item, the following operation is performed. The pack item read control data output from the control circuit 1 is decoded by the decoder 2 and the timing generation means 4 generates a timing signal according to the decoded control data. Address generating means 5 generates a predetermined address corresponding to the timing signal.
And is input to the storage means 7 via the address bus. The data output from the storage unit 7 is input to the pack item detection unit 9 via the latch unit 8. The pack item detection means 9 detects only the pack item from the input data and outputs it to the control circuit 1 via the selector 10. Now, assuming that the pack signal reproduced from the magnetic tape is stored in the storage means 7 as shown in FIG. 6, the address generation means 5 causes the data of an arbitrary even block address and an odd number larger by one than that. An address is generated so that the data of the block address can be read in order from the pack area 1 to the pack area 7. Further, the pack item detection means 9 detects only the pack item from the data input from the storage means 7 via the latch means 8 and outputs it to the control circuit 1 via the selector 10. Therefore, only the pack item of the pack output from the storage means 7 is output to the control circuit 1. The control circuit 1 reads a pack item of each pack, selects a necessary pack from the pack items, and outputs pack specification data designating a pack to be read to the decoder 2 together with control data for reading the pack. The decoder 2 decodes the input control data and pack designation data and inputs them to the timing generation means 4. The timing generation means 4 generates a timing signal according to it. The address generating means 5 generates an address in which the pack specified by the generated timing signal is stored, and inputs it to the storing means 7 via the address bus. The pack thus output from the storage means 7 is output to the control circuit 1 via the latch means 8 and the selector 10.

[0004]

The conventional magnetic recording / reproducing apparatus is configured as described above, and the inevitable method of reading a pack item as described above is
The pack items that can be read by the read operation once
Only part of the actually recorded pack items can be read. Further, even when reading packs, only one pack can be read by one read operation, and when plural types of packs are required, it is necessary to repeatedly specify. Further, there has been a problem that the processing in the pack item such as the microcomputer and the means for designating the pack becomes complicated.

The present invention has been made to solve the above problems, and pack items corresponding to a plurality of block addresses stored in the storage means can be read by one read operation. An object of the present invention is to obtain a magnetic recording / reproducing device capable of reading at least one or more packs by one read operation even when reading the packs.

[0006]

According to a first aspect of the present invention, there is provided a magnetic recording / reproducing apparatus for controlling a storage unit for storing a pack signal reproduced from a recording medium and a control for controlling reading of data stored in the storage unit. Search control means for designating a block address in which the pack is recorded corresponding to designated contents included in the data, address generation means for referring to the designated block address and generating a predetermined address, and the pack A pack item detection means for detecting a pack item, and an auxiliary storage means for storing at least one or more designated contents included in the control data.

According to a second aspect of the present invention, in the magnetic recording / reproducing apparatus, at least one included in the storage means for storing the pack signal reproduced from the recording medium and the control data for controlling the reading of the data stored in the storage means. Designated content holding means for storing one or more designated contents; search control means for designating a pack area in which the pack to be read corresponding to the designated contents stored in the designated content holding means is designated; Referring to the instruction of the search control means,
And an address generating means for generating a predetermined address.

[0008]

The pack signal reproduced from the recording medium of the present invention is temporarily stored in the storage means. When reading the stored pack item of the pack, a desired block address is designated a plurality of times, and the pack item recorded at the desired block address is read.

Further, when reading a pack, the pack area in which the desired pack is recorded is designated a plurality of times to read the desired pack.

[0010]

EXAMPLES Example 1. Hereinafter, the present invention will be described with reference to the drawings. Figure 1
FIG. 1 is a block diagram showing a magnetic recording / reproducing apparatus in Embodiment 1 of the present invention. In the figure, 1 is a control circuit for controlling the reading of data, and 2 is a decoder for decoding the control data input from the control circuit 1. The control data is composed of a command code for instructing the reading of the pack item and at least one or more designation contents following it (see FIG. 4). Reference numeral 3 is a search control means for designating a block address according to the designation content of control data,
Reference numeral 4 is a timing generation means for outputting a predetermined timing signal to the address generation means 5, and 5 is an address generation means for generating a predetermined address according to the timing signal input from the timing generation means 4 and the block address designated by the search control means 3. , 6 is a signal processing means for converting the signal reproduced from the magnetic tape into predetermined data, 7 is a storage means for storing the data converted by the signal processing means 6,
Reference numeral 8 is a latch means for temporarily latching the data output from the storage means 7, 9 is a pack item means for detecting a pack item from the latched data, and 10 is a selector.

In the above configuration, when reading a pack item, the decoder 2 decodes the designated contents from the control data output from the control circuit 1. The decoded designation contents are input to the search control means 3 and the timing generation means 4. The search control means 3 designates the block address corresponding to the inputted designation content. The timing generation means 4 generates a timing signal in accordance with the input designated contents, and the address generation means 5 generates a predetermined address corresponding to the timing signal and the block address designated by the search control means 3, and via the address bus. Input to the storage means 7.

It is assumed that pack data reproduced from the magnetic tape is stored in the storage means 7 as shown in FIG. 6, for example. That is, packs recorded in all pack areas of 8 blocks each reproduced from two sub-data areas SUB1 and SUB2 (see FIG. 7) of one recording track on the magnetic tape are sequentially stored for each block. There is.

Addresses are generated by the address generating means 5 so that the packs of the even block address and the odd block address which is one larger than the even block address are sequentially read from the pack area 1 to the pack area 7.

The data thus read from the storage means 7 is latched by the latch means 8, and the pack item detection means 9 outputs only the pack item to the control circuit 1 through the selector 10.

That is, when the block address designated by the search control means 3 is block address 0,
If the pack items of all the packs recorded in the block addresses 0 and 1 are set as the block address 8, the pack items of all the packs recorded in the block addresses 8 and 9 can be read.

Example 2. FIG. 2 is a block diagram showing a magnetic recording / reproducing apparatus according to a second embodiment of the present invention, in which the auxiliary storage means 11 for temporarily storing the designated contents decoded by the decoder 2 is provided in the above embodiment. is there.

The control data including at least one designated content output from the control circuit 1 is input to the decoder 2. The decoder 2 decodes the specified content from the input control data, inputs it to the timing generation means 4, and stores it in the auxiliary storage means 11. Search control means 3
Specifies a block address according to the specified content stored in the auxiliary storage means 11. The address generation means 5 generates a predetermined address according to the designated block address and reads the pack item from the storage means 7. 1
After the reading of the pack item at one block address is completed, the search control means 3 designates a block address according to the next designation content stored in the auxiliary storage means 11. The above-mentioned operation is performed by the auxiliary storage device 11
Perform as long as there is the next instruction content stored in.

Example 3. FIG. 3 is a block diagram showing a magnetic recording / reproducing apparatus according to an embodiment of the present invention. In the figure, 1 is a control circuit for controlling the reading of data, and 2 is a decoder for decoding the control data input from the control circuit 1. Is. The control data is composed of a command code for instructing the reading of the pack and at least one or more designation contents following it (see FIG. 4). Reference numeral 12 denotes a designated content holding means for storing the designated content decoded by the decoder 2, and 3 denotes an instruction of a pack area in which a pack to be read is recorded according to the designated content stored by the designated content holding means 12. Search control means to perform, 4
Is a timing generation means for outputting a predetermined timing signal to the address generation means 5, and 5 is an address generation means for generating a predetermined address according to the timing signal input from the timing generation means 4 and the pack area instructed by the search control means 3. , 6 is signal processing means for converting the signal reproduced from the magnetic tape into predetermined data, 7 is storage means for storing the data converted by the signal processing means 6, and 8 is data latched by the storage means 7. It is a latch means for

In the above configuration, when reading a pack, the control content including at least one designated content outputted from the control circuit 1 is decoded by the decoder 2 and stored in the designated content holding means 12. To the timing generation means 4. The search control means 3
The pack area in which the pack to be read is recorded corresponding to the designated content stored in the designated content holding unit 12 is designated. The timing generation means 4 generates a timing signal in accordance with the input designated content. The address generation means 5 generates a predetermined address corresponding to the timing signal and the pack area designated by the search control means 3, and inputs it to the storage means 7 via the address bus.

The data read from the storage means 7 in this manner is latched by the latch means 7 and output to the control circuit 1.

After the reading of one pack is completed,
The search control means 3 instructs the pack area in which the pack to be read is recorded according to the next instruction content stored in the designated content holding means 12. The above operation is repeated as long as the next instruction content stored in the designated content holding means 12 exists.

[0022]

In the magnetic recording / reproducing apparatus according to the first and second embodiments of the present invention, the storage means for storing the pack signal reproduced from the recording medium and the control data for controlling the reading of the data stored in the storage means. Search control means for designating a block address in which the pack is recorded corresponding to the designated content included in the pack, address generation means for generating a predetermined address by referring to the designated block address, and the pack of the pack. By providing a pack item detection means for detecting an item, a pack item of a pack recorded at a desired block address can be read, and at least one or more designated contents included in the control data is stored as an auxiliary storage. Since it is also configured to include means, it is possible to read out a desired number of pack items at once. Because, corner without causing extra read latency in the control circuit, also, it is possible to specify the block address arbitrarily by the specified content, it is possible to perform preferentially searched less storage area erroneous,
There is an effect that a desired pack item can be quickly obtained.

In the magnetic recording / reproducing apparatus according to the third embodiment of the present invention, at least one included in the storage means for storing the pack signal reproduced from the recording medium and the control data for controlling the reading of the data stored in the storage means. Designated content holding means for storing one or more designated contents; search control means for designating a pack area in which the pack to be read corresponding to the designated contents stored in the designated content holding means is designated; Referring to the instruction of the search control means,
Since it is configured to include an address generation unit that generates a predetermined address, it is possible to read a plurality of desired packs at a time, so that it is possible to avoid giving an extra read waiting time to the control circuit and to specify the specified content. Since the pack area can be arbitrarily designated by the method, there is an effect that the area with few errors is preferentially selected and the pack can be obtained quickly.

[Brief description of drawings]

FIG. 1 is a block diagram showing a magnetic recording / reproducing apparatus according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a magnetic recording / reproducing apparatus according to a second embodiment of the present invention.

FIG. 3 is a block diagram showing a magnetic recording / reproducing apparatus according to a third embodiment of the present invention.

FIG. 4 is a diagram showing a control data format in the present invention.

FIG. 5 is a block diagram showing a conventional magnetic recording / reproducing apparatus.

FIG. 6 is a diagram showing an example of a storage format of pack data in a storage means.

FIG. 7 is a diagram showing a recording track format of R-DAT.

FIG. 8 is a diagram showing a block format of sub data.

FIG. 9 is a pack data configuration diagram.

[Description of Reference Signs] 1 control circuit 2 decoder 3 search control means 4 timing generation means 5 address generation means 6 signal processing means 7 storage means 8 latch means 9 pack item detection means 10 selector 11 auxiliary storage means 12 designated content holding means

Claims (2)

[Claims] 1. Storage means for storing additional information consisting of a plurality of types of pack data inserted in a digital signal reproduced from a recording medium, and control means for controlling reading of the additional information from the storage means. A retrieval control means for designating a storage area of the additional information in the storage means based on the control data output from the control means, and a read address of the additional information in the storage means according to the designation of the retrieval control means. In a device including address generating means for generating a packet and pack item detecting means for reading identification information for identifying the type of pack data in the additional information from a storage area designated by the address generating means. An auxiliary storage unit for storing a plurality of designated data of the storage area output from the storage unit; A magnetic recording / reproducing apparatus, wherein addresses are sequentially generated by the address generating means by sequentially reading the designated data, and the identification information in the storage means is read a plurality of times. 2. Storage means for storing additional information consisting of a plurality of types of pack data inserted in a digital signal reproduced from a recording medium, and control means for controlling reading of the additional information from the storage means. A designated content holding means for storing designated data for designating the storage area in the storage means and the type of the pack included in the control data outputted by the control means, and the designated content holding means sequentially outputting the designated data. Retrieval control means for designating a storage area of additional information in the storage means based on designated data, and reading of the additional information in the storage means in accordance with designated data of the storage area sequentially output from the search control means. Address generation means for generating an address and designation of the additional information designated by the address generation means output from the designation content holding means A magnetic recording / reproducing apparatus comprising a pack data reading means for reading a storage area indicated by data and a pack type in order.