JPH06259873A - Information recording and reproducing device - Google Patents

Abstract

(57) [Abstract] [Purpose] To reduce power consumption and improve earthquake resistance in a device that records or reproduces data on or from an information recording medium. [Structure] Data transfer speed a in recording / reproducing means 11 for an information recording medium and processing means 13 for processing the data.
In the data transfer rate b in the above, there is a relation of a> b, and the processing means 13 is a continuous operation in constructing a device having the storage means 12 between both means and continuously processing and recording / reproducing data. Even if the recording / reproducing means 11 is configured so that the control means 14 can select two states, that is, a low power consumption state in which the operation is temporarily stopped and an intermittent operation is performed, and a high earthquake resistance state in which the operation is not stopped, Plan for effective use.

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 disc.

[0002]

2. Description of the Related Art In recent years, recording media such as optical discs capable of high-density recording / reproduction have appeared, and recording media capable of recording / reproducing the same data amount have been downsized. In addition, information is digitized and compressed during recording,
The amount of information to be recorded can be reduced by performing decompression processing at the time of reproduction, and circuits for processing are being integrated into integrated circuits.
Further, due to advances in packaging technology, information recording / reproducing devices capable of recording / reproducing music data and image data are becoming smaller and lighter, and are becoming popular as portable devices.
Taking a music disc as an example, it is evolving from an LP record that records analog signals to a compact disc that records digital signals, to a mini disc that compresses recorded information. It's coming.

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

The operation of the information recording / reproducing apparatus configured as 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 from the storage means 42 and recorded on the recording / reproducing medium via the recording / reproducing means 41. Here, the storage means 42 corrects the time axis when the transfer speeds between the recording / reproducing means 41 and the processing means 43 are different, corrects the time axis such as data rearrangement, and temporarily stores the data. It is used as a backup in case the recording / reproducing medium is a disk and temporary data is lost due to vibration to improve the earthquake resistance. The series of operations just described is performed under the control of the control unit 44, and the power supply unit 45 supplies power to each unit of the present 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 structure, although the seismic resistance is excellent, electric power is constantly consumed in order to ensure seismic resistance even in a use state where vibration does not occur. In the case of a portable device, it is necessary to incorporate a battery as a power supply unit, which causes 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 an object thereof is to provide an information recording / reproducing apparatus capable of effectively utilizing a power source in correspondence with both reduction of power consumption and improvement of earthquake resistance.

[0008]

In order to achieve this object, an information recording / reproducing apparatus of the present invention has a data transfer rate a in a recording / reproducing means for recording data on an information recording medium or reproducing data from the information recording medium. At the data transfer rate b in the processing means for processing the data, there is a relation of a> b, and the 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 storing means In constructing an apparatus for continuously processing and recording or reproducing data in time, even if the processing means is a continuous operation, at least a part of the recording / reproducing means causes an intermittent operation to temporarily stop the operation. The stop period is the first operation state in which at least one of the voltage, current, control signal and system clock is stopped from being supplied to at least a part of the recording / reproducing means. And a second operation state in which the control means can select two operation states by external selection information if necessary, and the control means controls the data amount X in the storage means. Monitored, for a predetermined data amount K, X> during recording
When K, the second operating state, when X <K, the first operating state, and when reproducing, X> K, the first operating state, X <K
In this case, the operation state can be selected to be the second operation state, and the control means monitors the abnormality of at least one of the tracking signal and the focus signal during recording or reproduction to detect the tracking abnormality signal and the focus signal. After detecting at least one of the abnormal signals, the second signal is output for a certain period of time.
The operating state is selected so that the operating state is usually the first operating state. Further, the control means has the second operating state in the initial state for a certain period after the start of the operation of the apparatus. In addition, the control means sets the second operation state when continuously recording or reproducing a plurality of physically discrete areas of the information recording medium, and the control means is physically continuous. When recording or reproducing in the area, selection information from the outside or two states is automatically selected.

[0009]

According to the present invention, by the structure described above, the capacity of the storage means is made sufficiently large so that the first operation state, which is a low power consumption state capable of long-term operation, 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 structure of an information recording / reproducing apparatus according to an embodiment of the present invention. In FIG. 1, 11 is a recording / reproducing means, 12 is a storage means, 13 is a processing means, 14 is a control means, 15 is a power supply section, and 16 is a selection means.

The operation of the information recording / reproducing apparatus of this embodiment having the above structure will be described below. First, the operation during 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 speed b, read at the transfer speed a, sent to the recording / reproducing means 11 and recorded on the recording / reproducing medium. Although the operation is performed, there is a relation that a> b in the transfer speed. Data is gradually stored in the storage means 12 at the transfer rate b, and reading is not performed 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 maximum amount of data is stored in the storage unit 12, the recording / reproducing unit 11 is also operated, and the data is recorded on the recording / reproducing medium. Since there is a relation of a> b in the transfer rate, 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
Data is stored in 2 continuously at the transfer speed b, but is read out from the storage means 12 intermittently at the transfer speed a, and the operation of the recording / reproducing means 11 is stopped during the period when no data is read. The power supply is also stopped, and the control means 14 controls the above operation. Power supply 15
The control means 14 controls the selection means 16 to control the power supply to the recording / reproducing means 11. Next, the operation during reproduction in the low power consumption state will be described. The operation is the reverse of the operation at the time of recording, and the data recorded in the recording / reproducing medium is read by the recording / reproducing means 11, stored in the storage medium 12 at the transfer rate a, and transferred at the transfer rate b
Is sent to the read processing means 13. Transfer rate a>
Since there is a relationship of b, the data in the storage means 12 gradually increases with time. When the maximum amount is reached, the write operation to the storage means 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. Moreover, the supply from the power supply unit 15 to the recording / reproducing means 11 during that period is also stopped by the selecting means 16 controlled by the control means 14. Hereinafter, the above operation will be 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, without stopping the power supply to the recording / reproducing means 11, the amount of data in the storage means 12 is constantly close to the minimum value at the time of recording, and the amount of data in the storage means 12 is constantly at the time of reproduction. Even if the operation of the recording / reproducing means 11 is interrupted by the vibration, the control means 14 controls so as to be close to the maximum value, 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 serves 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 1 has been shown, the power consumption to the power supply is not limited to this, and the voltage,
It can also be realized by stopping the supply of current, control signals, and the like. Further, in the digital circuit unit, power consumption can be reduced by stopping the supply of the system clock while supplying the power. Further, the recording / reproducing means 1
It is not necessary to stop the supply to all the constituent elements in 1 and may be a part thereof.

Here, the control means 14 has a function of selecting the low power consumption state and the high earthquake resistance state described above, and which state is to be operated is determined by, for example, input information from the outside via the input means. It can be realized by specifying. Further, the control means 14 monitors the amount of data in the storage means 12, and a predetermined amount of data (hereinafter, this amount of data is referred to as K
If the amount of data is larger than K during recording, it is in a high earthquake resistance state, and if it is small, it is in a low power consumption state, and when reproducing, it is in a low power consumption state, if it is less than K. In this case, the two states can be automatically switched by controlling the selection means 16 so as to perform the operation in the high earthquake resistance state. For example, in a use state with little vibration during reproduction, the operation in the low power consumption state is performed in a state where the data amount K in the storage unit 12 exceeds the data amount K. Since the amount of data inside is less than K, it will operate in a highly earthquake-resistant state. Further, the control means 14 monitors the tracking signal or the focus signal being recorded or reproduced by the recording / reproducing means 11, and keeps a high earthquake resistance state for a certain period after the detection of the tracking abnormality signal or the focus abnormality signal. It is also possible to automatically switch between the two states by controlling the selection means 16 to perform the operation. For example, during playback, it usually operates in a low power consumption state, vibration occurs, tracking is lost, a tracking abnormality signal is detected, and it operates in a high earthquake resistance state.If a tracking abnormality signal is not detected for a certain period, it will be in a low power consumption state. If the tracking error signal is continuously detected and returned, the high seismic resistance state will continue. The same applies to the focus signal.

Further, the stability of the apparatus of the present invention can be increased by operating it in a highly earthquake-resistant state in the initial state for a certain period after the start of operation, and then switching between the two states by the above-mentioned various methods. You can Further, when recording or reproducing a plurality of physically discrete areas of the information recording medium one after another, it is necessary to operate the recording / reproducing means at all times, so that the information recording medium is operated in a high earthquake resistance state. When recording or reproducing in a physically continuous area, the stability of the apparatus can be secured by switching between the two states by the above-mentioned various methods.

As described above, according to the present embodiment, the control means 14 is configured to be able to select between the low power consumption state and the high earthquake resistance state. Can be used. Alternatively, the two states can be automatically switched to operate, and the power can be effectively used. In particular, the difference between the transfer rates a and b is large, and the capacity of the storage unit 12 is increased, so that more effective use is possible.

Next, a specific embodiment in which the present invention is applied to a recording / reproducing apparatus for a mini disk 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, 21 is a recording / reproducing medium, a mini disk, 22 is a head unit, 23 is a motor, 24 is a servo circuit, 25 is a modulator / demodulator, 26 is a code decoder, 27 is a semiconductor memory, 28 is a memory controller, and 29 is a memory controller. Is a system controller, 30 is a compression / expansion device, 31 is an AD and DA converter, 32 is a power supply unit, 33 is a switch, and 34 is an input unit. 1, the recording / reproducing means 11 in FIG. 1 is a constituent element in (a) of FIG. 2, and the storage means 12 in FIG. 1 is a semiconductor memory 27 in FIG.
2 is a component in FIG. 2B, a control unit 14 in FIG. 1 is a component in FIG. 2C, and a power supply unit 15 in FIG. 1 is a power supply unit 32 in FIG.
The selection means 16 is the switch 33 of FIG. In the present embodiment, the transfer rate between the code decoder 26 and the semiconductor memory 27 is 1.4 megabits / second, and the transfer rate between the semiconductor memory 27 and the compression / expansion apparatus 30 is 0.3 megabits / second. In the configuration shown in FIG. 2, information as to whether the apparatus operates 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 the configuration of the device in which the operating state of the device can be selected from the 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 the tracking signal and the focus signal via the servo circuit 24. Depending on the method, it is possible to automatically switch between the low power consumption state and the high earthquake resistance state.

In the above specific example, the information recording / reproducing medium is a mini disk which is a disk medium, but the information recording / reproducing medium is not limited to this and may be another recording / reproducing medium. For example, the present invention can be applied by using a compact disc as an information recording medium and rotating the disc at a higher speed than usual. It goes without saying that at this time, the device operates as a reproduction-only device and no recording operation is necessary.

[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 as follows. , A
> B, a storage unit is provided between the recording / reproducing unit and the processing unit, and data is processed and recorded continuously in time by a control unit that controls the recording / reproducing unit, the processing unit, and the storage unit. Alternatively, in constructing an apparatus for performing reproduction, even if the processing means is in continuous operation, at least a part of the recording / reproducing means is caused to perform an intermittent operation to temporarily stop the operation, and at least the recording / reproducing means is operated during the operation stop period. Selection information from the outside that has a first operating state in which at least one of the voltage, current, control signal and system clock is stopped and a second operating state in which it is not stopped. The control means can be selected by means of the control means. The control means monitors the data amount X in the storage means and compares it with 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
The operation state can be selected such that the first operation state is satisfied when> K and the second operation state is satisfied when X <K. Further, the control means is used for tracking signal or focus signal during recording or reproduction. For detecting a tracking abnormality signal or a focus abnormality signal and selecting the operation state so that the second operation state is maintained for a certain period of time and the first operation state is normally set. The means operates so as 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 records a plurality of physically discrete areas of the information recording medium. If you want to play the second operating state,
When recording or reproducing in a physically continuous area of the information recording medium, the first operation state is selected, which is important for both low power consumption and high earthquake resistance of the device. It is possible to select whether or not to place it, and it is possible to automatically switch it, and it is possible to fix it to either state as required. In particular, when a battery is built in as a portable device, the battery can be effectively used.

[Brief description of 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 of a specific embodiment of the present invention.

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

[Explanation of symbols]

 11 recording / reproducing means 12 storage means 13 processing means 14 control means 15 power supply section 16 selecting means 21 minidisk 22 head section 23 motor 24 servo circuit 25 modulator / demodulator 26 code decoder 27 semiconductor memory 28 memory controller 29 system controller 30 compression / expansion unit 31 AD and DA converter 32 Power supply unit 33 Switch 34 Input unit

Claims (6)

[Claims] 1. A data transfer rate 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 rate b in a processing means for processing data have a relation of a> b. , A storage means is provided between the recording / reproducing means and the processing means, and 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 constructing the apparatus, even if the processing means is in continuous operation, at least a part of the recording / reproducing means is caused to perform an intermittent operation to temporarily stop the operation, and an operation stop period is applied to at least a part of the recording / reproducing means. It has a first operating state in which the supply of at least one of voltage, current, control signal and system clock is stopped and a second operating state in which it is not stopped. An information recording / reproducing apparatus, wherein the control means can select two operating states. 2. An input means for accepting an input of selection information from the outside as to which of the first operation state and the second operation state the operation is performed and having an input means for transmitting the selection information to a control means. The information recording / reproducing apparatus according to claim 1, which is characterized in that. 3. The control means monitors the data amount X in the storage means, and with respect to a predetermined data amount K, when recording, the second operation state is satisfied when X> K, and when X <K. First
2. The information according to claim 1, wherein the operation state is selected so that the first operation state is set when X> K during reproduction, and the second operation state is set when X <K during reproduction. Recording / playback device. 4. The control means monitors the abnormality of at least one of the tracking signal and the focus signal during recording or reproduction, and detects the at least one of the tracking abnormality signal and the focus abnormality signal for a certain period after the second operation state. 2. The information recording / reproducing apparatus according to claim 1, wherein the operating state is selected so that the operating state is usually the first operating state. 5. The control means is set to a second operating state in an initial state for a certain period after the operation of the apparatus is started, and thereafter selected information from the outside or two operating states are automatically selected. The information recording / reproducing apparatus according to claim 1. 6. The control means sets the second operation 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 in the second operating state. The information recording / reproducing apparatus according to claim 1, wherein when recording or reproducing, selection information from the outside or two operation states are automatically selected.