JPH11110910A - Digital audio recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To write a data, which are recorded at a high speed, into a storage medium so as to make the data portable, to transfer the music data of the storage medium to an external device at a high speed and to reproduce the music data without driving the low speed storage medium device that has a large power consumption. SOLUTION: The music data from an external device are written into a high speed storage device 2 through a high speed data receiving circuit 1. The music data of the device 2 are transmitted to a decoder through a data controller 7, reproduced, also given to a low speed storage medium device 4 and written into a storage medium. Thus, the storage medium is taken out for a reproducing and is also used as a music storage. Once the data are copied into the device 2 during a reproducing, the data are read for a reproducing from the device 2 without operating the device 4 and the operating time of the device using a battery is made longer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital audio recording / reproducing apparatus which allows a storage medium to be removed, and enables high-speed recording / reproduction of music data and high-speed data transfer with an external device.

[0002]

2. Description of the Related Art In a conventional digital audio recording / reproducing apparatus, a recording speed mainly depends on a writing speed of a storage device. For this reason, a digital audio tape recorder (DAT) or a mini disk (MD) using a relatively low-speed and inexpensive storage device cannot perform high-speed recording even if recording data can be input at high speed. .

Conversely, even when outputting data to a device capable of high-speed recording, high-speed reproduction cannot be performed to perform high-speed recording.

On the other hand, in a digital audio recording / reproducing device using a memory IC or a hard disk drive, high-speed data writing is possible, but the storage device or storage medium is detached and carried around, or used for storing music data. Had the disadvantage of being expensive. In addition, at the time of reproduction, the mini disk (MD) and the hard disk drive are susceptible to vibration and have a drawback that the power consumption is large.

[0005] The present invention has been made in view of the above points, and its object is to record data from an external device at high speed,
The music data stored in the storage medium can be transferred to another external device at a high speed while being written in the storage medium to be portable. To provide a digital audio recording / playback apparatus capable of playing back audio.

[0006]

[Means for Solving the Problems]

(1) The present invention provides a high-speed storage device for reading and writing digital audio data at a high speed, a low-speed storage medium device for reading and writing digital audio data to and from a storage medium at a low speed, and the high-speed storage device A data controller for controlling the data transfer between the storage medium and the low-speed storage medium device, controlling the copying of the data of the storage medium to the high-speed storage device, and controlling the transmission of digital audio data to the playback unit. A high-speed data transmission / reception circuit for performing high-speed transfer and writing is provided between the high-speed storage device and an external device, and the data controller stores data written in the high-speed storage device. It is also characterized in that control of writing the data to the low-speed storage medium device can be performed even during reproduction of the data.

(2) During high-speed recording, digital audio data is written to a high-speed storage device from an external device via a high-speed data receiving circuit. In this case, since writing to the high-speed storage device can be performed without driving the low-speed storage medium device, high-speed recording is possible. The data written to the high-speed storage device is written to the storage medium of the low-speed storage medium device under the control of the data controller. Thus, the storage medium on which the music data is written can be arbitrarily removed and carried. The data writing to the low-speed storage medium device can be performed during the reproduction of the data written to the high-speed storage device. In this case, the user does not need to be conscious of writing to the low-speed storage medium device.

[0008] When reproducing music data recorded on a storage medium, the music data can be reproduced by driving a low-speed storage medium device. Under the control of the data controller, the data is temporarily copied to the high-speed storage device, and thereafter the data is read from the high-speed storage device with low power consumption and reproduced without driving the low-speed storage medium device. As a result, power consumption can be saved, and operation time by battery operation can be extended. Also, since the low-speed storage medium device is not driven during reproduction, it is not affected by vibration.

Further, by temporarily transferring music data in a storage medium to a high-speed storage device under the control of a data controller, the music data can be transferred and written to an external device at a high speed via a high-speed data transmission circuit.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention. In FIG.
Reference numeral 1 denotes a high-speed data receiving circuit that receives music data from an external device (not shown). 2 is a high-speed data receiving circuit 1
Is a high-speed storage device (for example, an IC memory) in which the digital audio data received at (1) is written at a high speed. 3
Is a high-speed data transmission circuit for transferring data read from the high-speed storage device 2 to an external device.

Reference numeral 4 denotes a low-speed storage medium device for reading and writing digital audio data to and from a storage medium (such as a mini disk or hard disk not shown) at a low speed. Reference numeral 5 denotes digital audio data (data at 1 × speed, etc.) input digitally or digital audio data (1 × speed data) obtained by converting analog audio data input at analog to digital by an analog / digital converter 6. Is an encoder for encoding.

Reference numeral 7 denotes control of data transfer between the high-speed storage device 2 and the low-speed storage medium device 4, control of copying data of the storage medium to the high-speed storage device 2, high-speed storage device 2, and low-speed storage medium device. 4. A data controller for controlling the transmission of each digital audio data of the encoder 5 to the decoder (reproducing unit) 8.

Reference numeral 9 denotes a digital / analog converter for converting the digital signal decoded by the decoder 8 into analog audio data.

The storage capacity of the high-speed storage device 2 depends on the data compression method.
It has a capacity capable of storing data obtained by compressing data for one sheet, and is set to 50 MB (megabyte) or more.

In the apparatus configured as described above, digital audio data is written to the high-speed storage device 2 from the external device through the high-speed data receiving circuit 1 during high-speed recording. At this time, since only writing to the high-speed storage device 2 with a high data writing speed is performed, high-speed recording is possible. The audio data written in the high-speed storage device 2 can be reproduced by being supplied to the decoder 8 via the data controller 7.

The data in the high-speed storage device 2 is similarly supplied to the low-speed storage medium device 4 via the data controller 7, and the data is written to the storage medium. As a result, the storage medium on which the music data is written can be arbitrarily removed, carried around, and used for storing music data.

The data writing to the low-speed storage medium device 4 can be automatically performed after the data has been written to the high-speed storage device 2 even during music reproduction. There is no need to be conscious of writing data to the low-speed storage medium device 4.

When playing back music data recorded on a storage medium (not shown) using the digital audio recording / playback apparatus of the present invention, data read out using the low-speed storage medium apparatus 4 is sent to the data controller 7. To the decoder 8 via. However, when the power consumption of the low-speed storage medium device 4 is large, the data is copied to the high-speed storage device 2 once, and thereafter the low-speed storage medium device 4 is operated without operating the low-speed storage medium device 4. By reading the data, the data can be reproduced, and the operation time by battery driving can be extended.

The data once written in the high-speed storage device 2 can be transferred to an external device via the high-speed data transmission circuit 3. As the external device, a digital audio recording / reproducing device having the same function as that of the present invention is assumed. By connecting a device capable of high-speed reception to the external device, high-speed transfer / writing can be performed.

Further, while music data is reproduced using the low-speed storage medium device 4, high-speed recording by the high-speed storage device 2 and high-speed data transfer to an external device can be performed.

[0021]

As described above, according to the present invention, the following excellent effects can be obtained. (1) An inexpensive low-speed storage medium device in which data is read and written at a low speed allows the storage medium to be detached and carried, or used for storing music data.

(2) It is possible to perform high-speed recording and high-speed data transfer while having the low-speed storage medium device for reading and writing data at a low speed.

(3) Despite having a low-speed storage medium device with relatively large power consumption, data is once copied to a high-speed storage device with low power consumption and reproduced using the high-speed storage device. Thereby, low power consumption reproduction becomes possible. In addition, since a mini disk or a hard disk does not need to be used at the time of reproduction, a problem of being weak against vibration does not occur.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating an embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 high-speed data receiving circuit 2 high-speed storage device 3 high-speed data transmission circuit 4 low-speed storage medium device 5 encoder 6 analog / digital converter 7 data controller 8 decoder 9 digital / analog converter

Claims (4)

[Claims] Reading digital audio data,
A high-speed storage device for writing at a high speed; a low-speed storage device for reading and writing digital audio data to and from a storage medium; a control of data transfer between the high-speed storage device and the low-speed storage medium device A digital audio recording / reproducing apparatus, comprising: a data controller for performing control for copying data in the storage medium to a high-speed storage device and transmitting digital audio data to a reproducing unit. 2. The digital audio recording according to claim 1, wherein a high-speed data transmission / reception circuit for performing high-speed transfer and writing is provided between the high-speed storage device and an external device. Playback device. 3. The digital data processing apparatus according to claim 1, wherein the data controller can perform control of writing the data to the low-speed storage medium device even during reproduction of the data written to the high-speed storage device. Audio recording and playback device. 4. The digital controller according to claim 2, wherein the data controller can control writing of the data to the low-speed storage medium device even during reproduction of the data written to the high-speed storage device. Audio recording and playback device.