JP2979884B2 - Information recording / reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording / reproducing apparatus for recording and reproducing information such as music signals and image signals on an information recording medium such as a disk.

[0002]

2. Description of the Related Art In recent years, recording media capable of performing high-density recording and reproduction, such as optical disks, have appeared, and recording media capable of recording and reproducing the same data amount have been reduced in size. Also, the information is digitized and compressed during recording,
By performing decompression processing during reproduction, the amount of information to be recorded can be reduced, and integrated circuits are being used for processing circuits.
Furthermore, with the progress of mounting technology, information recording / reproducing apparatuses capable of recording and reproducing music data and image data have been reduced in size and weight, and are becoming widespread as portable devices.
Taking music discs as an example, LP discs that record analog signals are evolving into compact discs that record digital signals, and minidiscs that further compress the recorded information. It has become.

[0003] A conventional information recording / reproducing apparatus will be described below. FIG. 3 shows a block diagram of this conventional information recording / reproducing apparatus. In FIG. 3, 41 is a recording / reproducing unit, 42 is a storage unit, 43 is a processing unit, 44 is a control unit, and 45 is a power supply unit.

[0004] The operation of the information recording / reproducing apparatus configured as described above will be described below.

At the time of recording, the data to be recorded is written from the processing means 43 to the storage means 42, then read out from the storage means 42 and passed through the recording / reproduction means 41 to be recorded on the recording / reproduction medium. Here, the storage unit 42 corrects the time axis such as when the transfer speed between the recording / reproducing unit 41 and the processing unit 43 is different, or rearranges the data, or temporarily stores the data. This is used as a spare when temporary data is lost due to vibration when the recording / reproducing medium is disk-shaped, and is used to improve earthquake resistance. The above-described series of operations are performed under the control of the control unit 44, and power is supplied from the power supply unit 45 to each unit of the apparatus. On the other hand, at the time of reproduction, the data is reproduced from the recording / reproducing medium by the operation reverse to the above.

[0006]

However, in the above-mentioned conventional construction, although the construction is excellent in seismic resistance, even in a use state where vibration does not occur, power is constantly consumed in order to secure the seismic resistance. In the case of a portable device, it is necessary to incorporate a battery as a power supply unit, and there is a problem that the battery cannot operate for a long time.

An object of the present invention is to solve the above-mentioned conventional problems and to provide an information recording / reproducing apparatus which can cope with both reduction of power consumption and improvement of earthquake resistance and which can effectively use a power supply.

[0008]

In order to achieve this object, an information recording / reproducing apparatus according to the present invention comprises a data transfer speed a in a recording / reproducing means for recording data on an information recording medium or reproducing data from the information recording medium. In the data transfer speed b in the processing means for processing data, there is a relationship of a> b, and there is a storage means between the recording / reproducing means and the processing means, and the control means for controlling the recording / reproducing means, the processing means, and the storage means, In configuring an apparatus for processing and recording or reproducing data continuously in time, even if the processing means is a continuous operation, at least a part of the recording and reproducing means performs an intermittent operation for temporarily stopping the operation, and The suspension period is a first operation state in which supply of at least one of a voltage, a current, a control signal, and a system clock to at least a part of the recording / reproducing means is suspended. And a second operation state in which the operation is not stopped, and the control means can select the two operation states according to external selection information if necessary. The control means controls the data amount X in the storage means. Monitoring, for a predetermined data amount K, X>
At the time of K, it is in the second operation state, when X <K, it is the first operation state, and at the time of reproduction, when X> K, it is the first operation state, X <K
In the case of (2), the operation state can be selected so as to be in the second operation state, and the control means monitors at least one of the tracking signal and the focus signal during recording or reproduction to detect the tracking abnormality signal and the focus error signal. After detecting at least one of the abnormal signals, the second
And the operating state is normally selected so as to be the first operating state. Further, the control means controls the second operating state in an initial state for a certain period after the operation of the apparatus is started. The control means sets the second operating state when continuously recording or reproducing a plurality of physically discrete areas of the information recording medium, and sets the physically continuous area of the information recording medium. When recording or reproducing in the area, selection information from outside or two states are automatically selected.

[0009]

According to the present invention, the capacity of the storage means is made sufficiently large by the above-described configuration, so that the first operation state, which is a low power consumption state capable of operating for a long time, and the high earthquake resistance state, which is strong against vibration, are provided. It is possible to select a certain second operation state, and it is possible to obtain the advantages of both operation states in a well-balanced manner.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a general configuration of an information recording / reproducing apparatus according to an embodiment of the present invention. In FIG. 1, reference numeral 11 denotes a recording / reproducing unit, 12 denotes a storage unit, 13 denotes a processing unit, 14 denotes a control unit, 15 denotes a power supply unit, and 16 denotes a selection unit.

The operation of the information recording / reproducing apparatus of the present embodiment configured as described above will be described below. First, the operation at the time of recording in the low power consumption state will be described. The data subjected to the processing for recording by the processing means 13 is stored in the storage means 12 at the transfer rate b, read out at the transfer rate a, sent to the recording / reproduction means 11, and recorded on the recording / reproduction medium. The operation is performed. Here, there is a relation of a> b in the transfer speed. Data is gradually stored in the storage means 12 at the transfer rate b over time, and is not read out until the maximum amount is reached. That is, the operation of the recording / reproducing means 11 is stopped, and the power supply is also stopped. The read operation is performed at the transfer rate a from the time when the amount of data in the storage means 12 reaches the maximum amount, the recording / reproducing means 11 also operates, and the data is recorded on the recording / reproducing medium. Since there is a relationship of a> b in the transfer speed, the data in the storage means 12 decreases with time. Then, when there is no more data, the read operation is stopped, and the power supply to the recording / reproducing means 11 is also stopped. Hereinafter, the above operation is repeated. Storage means 1
2 is continuously performed at the transfer rate b, while reading from the storage means 12 is performed intermittently at the transfer rate a, and during the non-reading period, the operation of the recording and reproducing means 11 is stopped. The power supply is also stopped, and the control means 14 controls the above operation. Power supply unit 15
The control unit 14 controls the selection unit 16 to control the power supply to the recording / reproduction unit 11. Next, the operation at the time of reproduction in the low power consumption state will be described. The operation is the reverse of the above-described recording operation. The data recorded in the recording / reproducing medium is read out by the recording / reproducing means 11, stored in the storage medium 12 at the transfer speed a, and transferred to the transfer speed b.
And sends it to the read processing means 13. About transfer speed a>
Since there is a relationship b, the data in the storage means 12 gradually increases with time. When the maximum amount is reached, the writing operation to the storage unit 12 is stopped. That is, the operation of the recording / reproducing means 11 is stopped, and reading from the recording / reproducing medium is not performed. In addition, the supply from the power supply unit 15 to the recording / reproducing unit 11 is also stopped by the selecting unit 16 controlled by the control unit 14 during that period. Hereinafter, the above operation is repeated.

Next, the operation in the high earthquake resistance state will be described. This operation is basically the same as that described in the conventional example. That is, in the high earthquake resistance state, the power supply to the recording / reproducing means 11 is not stopped, so that the data amount in the storage means 12 is constantly close to the minimum value during recording, and the data amount in the storage means 12 is constantly maintained during reproduction. The control means 14 controls the value so as to be close to the maximum value, so that even if the operation of the recording / reproducing means 11 is interrupted by vibration, the influence on other parts can be suppressed, and the operation of the entire apparatus can be guaranteed.

In the above example, the recording / reproducing means 1 is used as a means for reducing power consumption when the operation of the recording / reproducing means 11 is stopped.
Although the method of stopping the power supply to the power supply 1 has been described, the power consumption may be reduced without being limited thereto, and the voltage,
It can also be realized by stopping the supply of the current, the control signal, and the like. In the digital circuit section, power can be supplied but power can be reduced by stopping supply of the system clock. Further, recording and reproducing means 1
It is not necessary to stop the supply to all the components in the unit 1 and it may be a part.

Here, the control means 14 has a function of selecting between the low power consumption state and the high seismic resistance state just described, and in which state the operation is to be performed, for example, selection information from the outside is input via the input means. Can be realized by specifying Further, the control means 14 monitors the data amount in the storage means 12 and determines a predetermined data amount (hereinafter, this data amount is
) Is set, and when the data amount is larger than K at the time of recording, the state is a high seismic resistance state; when the data amount is smaller, the state is a low power consumption state; In such a case, the two states can be automatically switched by controlling the selecting means 16 to perform the operation in the high earthquake resistance state. For example, in the use state where the vibration during reproduction is small, the operation in the low power consumption state is performed in a state where the data amount exceeds the data amount K in the storage means 12, but when the vibration occurs and the data amount from the recording / reproduction means 11 decreases, the storage means 12 Is smaller than K, and operates in the high earthquake resistance state. Further, the control means 14 monitors a tracking signal or a focus signal during recording or reproduction from the recording / reproducing means 11, and sets a high seismic resistance state for a certain period after the detection of the tracking abnormal signal or the focus abnormal signal. By controlling the selecting means 16 to perform the operation, the two states can be automatically switched. For example, during playback, it normally operates in a low power consumption state, vibration occurs, tracking is lost, a tracking abnormal signal is detected, it operates in a high earthquake resistance state, and if a tracking abnormal signal is not detected for a certain period, it enters a low power consumption state. Returning, if the tracking abnormality signal is continuously detected, the high earthquake resistance state will be continued. The same applies to the focus signal.

In addition, the stability of the device is increased by operating the device of the present invention in a high seismic resistance state in an initial state for a certain period after the operation is started, and then switching between the two states by the above various methods. Can be. Further, in the case of continuously recording or reproducing a plurality of physically discrete areas of the information recording medium one after another, it is necessary to operate the recording and reproducing means at all times, so that the information recording medium is operated in a high seismic resistance state. When recording or reproduction is performed in a physically continuous area, the stability of the apparatus can be ensured by switching between the two states by the various methods described above.

As described above, according to the present embodiment, since the control means 14 is configured to be able to select between the low power consumption state and the high earthquake resistance state, the apparatus is fixed to one of the states. Can be used. Alternatively, the operation can be performed by automatically switching between the two states, and the power supply can be effectively used. In particular, by making the difference between the transfer speeds a and b large and increasing the capacity of the storage means 12, more effective use is possible.

Next, a specific embodiment in which the present invention is applied to a mini disc recording / reproducing apparatus will be described with reference to the drawings. FIG. 2 is a block diagram showing a specific embodiment of the present invention. In the figure, reference numeral 21 denotes a mini disk as a recording / reproducing medium, 22 denotes a head unit, 23 denotes a motor, 24 denotes a servo circuit, 25 denotes a modulator / demodulator, 26 denotes a code decoder, 27 denotes a semiconductor memory, 28 denotes a memory controller, 29 Is a system controller, 30 is a compression / expansion unit, 31 is an AD and DA converter, 32 is a power supply unit, 33 is a switch, and 34 is an input unit. As compared with the configuration of FIG. 1, the recording / reproducing means 11 in FIG. 1 is a component in FIG. 2A, and the storage means 12 in FIG. 1 is a semiconductor memory 27 in FIG.
1 is a component in (b) of FIG. 2, control means 14 in FIG. 1 is a component in (c) of FIG. 2, power supply unit 15 in FIG. 1 is power supply unit 32 in FIG.
Is the switch 33 in FIG. In this embodiment, the transfer speed between the codec 26 and the semiconductor memory 27 is 1.4 Mbit / s, and the transfer speed between the semiconductor memory 27 and the compression / decompression device 30 is 0.3 Mbit / s. In the configuration in FIG. 2, information indicating whether the present device is operated in the low power consumption state or the high earthquake resistance state is input to the system controller 29 from the outside via the input unit 34. In the low power consumption state, the system controller 29 controls the switch 33. This is a configuration of a device that allows the operation state of the device to be selected from outside. In addition, the input unit 34 is eliminated, and the system controller 29 monitors the data amount of the semiconductor memory 27 via the memory controller 28 or monitors the tracking signal and the focus signal via the servo circuit 24, as described above. Depending on the method, it is also possible to automatically switch between the low power consumption state and the high earthquake resistance state for operation.

In the above example, the information recording / reproducing medium is a mini disk which is a disk medium. However, the present invention is not limited to this, and other recording / reproducing media may be used. For example, the present invention can be applied by using a compact disk as an information recording medium and rotating the disk at a higher rotation speed than usual. In this case, it is needless to say that the device operates as a reproduction-only device and does not require a recording operation.

[0020]

As described above, according to the present invention, the data transfer rate a in the recording / reproducing means for recording data on the information recording medium or reproducing the data from the information recording medium and the data transfer rate b in the processing means for processing the data are described. , A
> B, a storage means is provided between the recording / reproducing means and the processing means, and the control means for controlling the recording / reproducing means, the processing means, and the storage means processes and records data continuously in time. Or, when configuring an apparatus that performs reproduction, even if the processing unit is a continuous operation, at least a part of the recording and reproduction unit performs an intermittent operation to temporarily suspend the operation, and the operation stop period is at least one of the recording and reproduction unit. A first operation state in which the supply of at least one of a voltage, a current, a control signal, and a system clock to a part is stopped, and a second operation state in which the supply is not stopped; The control means can select the data amount. The control means monitors the data amount X in the storage means, and determines the data amount K with respect to a predetermined data amount K. When X> K is at the time of recording the first operating state when the second operating state, X <K, at the time of reproduction X
When K> K, the first operating state can be selected, and when X <K, the second operating state can be selected. The control means controls the tracking signal or focus signal during recording or reproduction. And the operation state is selected so as to be in the second operation state for a certain period after detecting the tracking abnormality signal or the focus abnormality signal, and usually to be in the first operation state. The means operates to be in the second operation state in an initial state for a certain period after the operation of the apparatus is started, and the control means continuously records or physically records a plurality of physically discrete areas of the information recording medium. In the case of reproduction, the second operation state is set,
When recording or reproduction is performed in a physically continuous area of the information recording medium, the first operation state is selected. The emphasis is on either low power consumption or high earthquake resistance of the device. Can be selected as well as automatically switched, and can be fixed to either state as needed. In particular, when a battery is incorporated as a portable device, the battery can be effectively used.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a general configuration of an information recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a block diagram according to a specific embodiment of the present invention.

FIG. 3 is a block diagram of a conventional information recording / reproducing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Recording / reproducing means 12 Storage means 13 Processing means 14 Control means 15 Power supply part 16 Selection means 21 Mini disk 22 Head part 23 Motor 24 Servo circuit 25 Modulator / demodulator 26 Codec 27 Semiconductor memory 28 Memory controller 29 System controller 30 Compression / expansion machine 31 AD and DA converter 32 Power supply unit 33 Switch 34 Input unit

Claims (6)

(57) [Claims] 1. A data transfer speed a in a recording / reproducing means for recording data on an information recording medium or reproducing data from the information recording medium and a data transfer speed b in a processing means for processing data, such that a> b. A storage means between the recording / reproducing means and the processing means, wherein the recording / reproducing means, the processing means, and the control means for controlling the storage means perform processing and record / reproduce data continuously in time. In configuring the apparatus, even if the processing unit is a continuous operation, at least a part of the recording and reproducing unit performs an intermittent operation for temporarily suspending an operation, and an operation stop period corresponds to at least a part of the recording and reproducing unit. It has a first operation state in which supply of at least one of a voltage, a current, a control signal, and a system clock is stopped, and a second operation state in which the supply is not stopped. An information recording / reproducing apparatus, wherein the control means can select one of two operation states. 2. An apparatus according to claim 1, further comprising an input unit for receiving an input of selection information from the outside to determine whether to operate in the first operation state or the second operation state, and transmitting the selection information to a control unit. 2. The information recording / reproducing apparatus according to claim 1, wherein: 3. The control means monitors the data amount X in the storage means, and for a predetermined data amount K, a second operation state when X> K at the time of recording and a second operation state when X <K at the time of recording. First
2. An information processing apparatus according to claim 1, wherein the operation state is selected such that the first operation state is established when X> K during reproduction, and the second operation state is established when X <K. Recording and playback device. 4. The control means monitors an abnormality of at least one of a tracking signal and a focus signal during recording or reproduction, and detects the at least one of the tracking abnormal signal and the focus abnormal signal for a certain period after detecting the at least one signal. 2. The information recording / reproducing apparatus according to claim 1, wherein the operation state is selected so that the first operation state is normally set. 5. The control means sets a second operation state in an initial state for a certain period after the operation of the apparatus is started, and thereafter selects externally selected information or automatically selects two operation states. The information recording / reproducing apparatus according to claim 1. 6. The control means sets a second operation state when continuously recording or reproducing a plurality of physically discrete areas of the information recording medium, and sets the second operating state in the physically continuous area of the information recording medium. 2. The information recording / reproducing apparatus according to claim 1, wherein when recording or reproducing is performed, selection information from outside or two operation states are automatically selected.