JP2007066337A - Hard disk audio apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hard disk audio apparatus capable of preventing the fluctuation of the sound of audio output due to a current or voltage change caused by the activation of an HDD or the like during audio output. <P>SOLUTION: The HDD 1 is provided with a disk 5 which records audio data and is rotated by a motor 2, and a magnetic head 4 which reads the data recorded on the disk. A device decoder 7 is provided with a device decoder memory 8 which records the data read by the magnetic head and a decoding part 9 for reading the data in the memory in the order and then decoding them while erasing them. A free capacity detection means 15 detects the free capacity of the device decoder memory. When it is detected that the free capacity is a prescribed value or less, recording of the audio data read by the magnetic head in the device decoder memory is stopped while continuing the rotational drive of the motor of the HDD. When it is detected that the free capacity is the prescribed value or more, control of recording them in the device decoder is performed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a hard disk audio apparatus that records various types of audio data on a hard disk, and reproduces and outputs the data. In particular, the rotation and stop of the hard disk causes voltage and current fluctuations and affects audio quality. The present invention relates to a hard disk audio device that can prevent the above-described problem.

  Due to the recent increase in storage capacity of hard disks and the reduction in the price of hard disk drives (hereinafter referred to as “HDDs”) that read and output data recorded on the hard disks, the storage of personal computers that has been widely used in the past It has been used in a wide range of applications, from devices to home video, use as a personal portable audio device, and use as a data recording medium for a vehicle navigation device.

  Recording audio data on such HDD discs is also used as a personal portable audio device as described above, but it has been conventionally used particularly in navigation devices mounted on vehicles. Instead of recording data on a conventional DVD, data is easily recorded on a HDD disk. When using an HDD in a navigation device, it is possible to record much more data than a conventional DVD on a large-capacity HDD disk, so various facility information and image information as well as map data are recorded. It is supposed to be.

  In particular, in the HDD disk used as a data recording medium device of the navigation device, there is more room for recording various data as described above for the navigation device. , Mp3, wma, ATRAC3, and the like are also recorded. In particular, since audio data such as mp3 is compressed data, a large amount of music can be recorded in a part of the free space on the disk of the HDD, and when a vehicle driver selects and listens to various music, From this large number of songs, it is possible to search appropriately according to the artist, genre, etc., and to select and listen to the desired song easily.

  When audio data is recorded on the disk of the HDD and reproduced and listened to, when recorded in mp3, it is reproduced and output using a player equipped with software capable of reproducing the mp3 audio data. It becomes. In that player, for example, as shown in FIG. That is, the HDD 41 reads the audio data recorded on the disk 45 that is rotationally driven by the motor 42 with the magnetic head 44 that moves in the radial direction of the disk by the head drive unit 43 and stores it in the cache memory 46 provided in the HDD. While appropriately recording, this is output to the device decoder memory 48 provided in the device decoder 47 in the audio player.

  In the device decoder 47, the audio data input from the HDD 41 as described above is recorded in the device decoder memory 48, and the decoding unit 49 reads out the amount that can be appropriately processed from here, and according to the recording format of the audio data such as mp3 Data is decoded and output from the audio output unit 50 as an audio signal that can be processed in the audio player.

  Further, in the HDD operation system control unit 54 that performs overall control of the HDD operation, the audio capacity stored in the device decoder memory 48 is sequentially erased by the free capacity detection unit 53, as a result of erasing the data. When it is detected whether or not the device decoder memory 48 has a predetermined or larger free space, and it is detected that almost no data is left or the free space is larger than the predetermined amount, the rotation drive control unit 55 is informed of the motor 42 of the HDD 41. A rotation drive command is issued.

  At this time, the HDD operation system control unit 54 stores an access position corresponding to the data portion finally recorded in the device decoder memory 48 with respect to the magnetic head access control unit 52. The access position is read from 51, the head drive unit 43 is driven, and the magnetic head 44 is moved to the next access position.

  The audio data read by the magnetic head 44 is appropriately adjusted using the cache memory 46 as described above, and the data is recorded in the device decoder memory 48 of the device decoder 47. At this time, the free space detection unit 53 detects the free space in the device decoder memory 48, and outputs the signal to the HDD operating system control unit 54 when the free space is substantially exhausted or exceeds a predetermined amount. In the HDD operation system control unit 54, the rotation drive control unit 55 stops the rotation of the motor 42 of the HDD 41, and the magnetic head access control unit 52 stores the finally accessed position in the access position storage unit 51. . By repeating the above operation, the audio data recorded on the disk 45 of the HDD 41 can be smoothly decoded and an audio output can be obtained.

A technique that enables audio data recorded in mp3 to be reproduced with a higher level of sound quality is disclosed in Japanese Patent Laid-Open No. 2001-324996.
JP 2001-324996 A

  With the above-described configuration, the audio device using the conventional HDD records in the device decoder memory until the HDD audio data is full, stops the driving of the HDD motor at the time of recording until it is full, and then Decoding and erasing the data in the device decoder memory to drive the HDD motor again and read the data when the device decoder memory is almost free of data or exceeds the predetermined free space It will be repeated.

  As a result, the HDD motor is driven and stopped only by the free capacity state of the device decoder memory regardless of the state of the audio reproduction output. In particular, when the HDD motor is driven, more start-up current is required for motor start-up than during normal stable drive, and as a result, the voltage of the entire audio player including the HDD and device decoder decreases. This is particularly true when the audio data recorded on the HDD is read and reproduced by the vehicle audio device when the current is distributed from the vehicle battery power source to these audio devices and the current is supplied. The voltage drop of the current supply system becomes conspicuous.

  As a result, the volume output from the audio device to the speaker will fluctuate slightly, which will be annoying for audio enthusiasts who have a keen sense of sound, and a refusal will be raised for such people. Will be.

  Therefore, according to the present invention, in an audio device that reads audio data recorded in the HDD, decodes the audio data, and outputs audio, the HDD is not started or stopped during audio output, and the HDD is not output during audio output. The main purpose is to prevent the fluctuation of the sound of the audio output due to current and voltage changes caused by starting and stopping.

  In order to solve the above problems, a hard disk audio device according to the present invention includes a hard disk device including a disk that records audio data and is rotated by a motor, and a magnetic head that reads the data recorded on the disk. A device decoder comprising: a device decoder memory for recording the read audio data; and a decoding means for decoding the data after sequentially reading out the data of the device decoder memory, and a free space for detecting the free space of the device decoder memory When the detecting means detects that the free space in the device decoder memory is less than a predetermined value, the audio data read by the magnetic head is recorded in the device decoder memory while continuing the rotational drive of the hard disk motor. And recording the audio data read by the magnetic head in the device decoder memory when the free capacity detecting means detects that the free capacity of the device decoder memory is greater than or equal to a predetermined value, Control means for continuing the rotational drive of the hard disk motor during audio output.

  In another hard disk audio device according to the present invention, when the hard disk audio device stops recording audio data read by the magnetic head in a device decoder memory, the magnetic head repeatedly reads the same data. It is characterized by that.

  In another hard disk audio device according to the present invention, when the hard disk audio device stops recording the audio data read by the magnetic head in the device decoder memory, the magnetic head stores the data at consecutive addresses. It is characterized by reading.

  Another hard disk audio device according to the present invention includes a hard disk device including a disk that records audio data and is rotated by a motor, a magnetic head that reads the data recorded on the disk, and an audio that is read by the magnetic head. In a device decoder comprising a device decoder memory for recording data, a decoding means for decoding the data in the device decoder memory after sequentially reading and erasing the data, and a free capacity detecting means for detecting the free capacity of the device decoder memory When it is detected that the free space of the device decoder memory is equal to or greater than a predetermined value, the rotation output of the hard disk motor is stopped, and the audio output between songs is detected by the song detection means for detecting the interval between songs of the audio output Detect that there is Control means for driving the hard disk motor and recording the audio data read by the magnetic head in the device decoder memory only during a period of time, thereby stopping the rotation of the hard disk motor during audio output from the audio device. It is characterized by having.

  Another hard disk audio device according to the present invention is characterized in that, in the hard disk audio device, the device decoder memory records the audio data of the previous music in addition to the next music.

  Since the present invention is configured as described above, in an audio device that reads audio data recorded in the HDD, decodes it, and outputs audio, the HDD is not started or stopped during audio output. It is possible to prevent the fluctuation of the sound of the audio output due to the current and voltage change caused by the start-up of the HDD or the like during the output.

  An object of the present invention is to prevent audio output sound fluctuations caused by current and voltage changes caused by HDD activation during audio output, and to record audio data and rotate it with a motor; A hard disk device including a magnetic head for reading the data recorded on the device, a device decoder memory for recording the audio data read by the magnetic head, and a decoding means for sequentially decoding and decoding the data of the device decoder memory And when the free space detecting means for detecting the free space of the device decoder memory detects that the free space of the device decoder memory is equal to or less than a predetermined value, the hard disk motor is driven to rotate. While continuing, before The audio data read by the magnetic head is stopped when the recording of the audio data read by the magnetic head is stopped in the device decoder memory and the free space detecting means detects that the free space of the device decoder memory is equal to or greater than a predetermined value. By recording data in the device decoder memory, it is realized by providing a control means for continuing the rotational drive of the motor of the hard disk during audio output from the audio device.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a functional block diagram of the first embodiment of the present invention, and the basic configuration is the same as that of the conventional example of FIG. In addition, in the functional block diagram of FIG. 1 etc., the function part which performs each function can also be called means to perform each function. Audio data recorded on the disk 5 that is rotated by the motor 2 in the HDD 1 is read by the magnetic head 4 that moves in the radial direction of the disk by the head drive unit 3. In such a reading operation by the normal magnetic head 4, the audio data of the music instructed by the user by the memory control unit 13 in the magnetic head access control unit 12 is converted to the data in the remote part of the disk 5. Read in order.

  The audio data read by the magnetic head 4 of the HDD 1 is output to the device decoder memory 8 provided in the device decoder 7 of the audio player via the HDD external output enable / disable selection unit 6 shown as a switch in the illustrated embodiment. ing. In the normal reading control of the HDD 1 as described above, the HDD external output enable / disable selection unit 6 can output data from the HDD 1 to the device decoder 7 by an HDD operating system control unit 16 which will be described later. Is closed. In the illustrated example, the cache memory of the HDD is not shown, but a cache memory can also be used as in the conventional example.

  In the device decoder 7, the audio data input from the HDD 1 as described above is recorded in the device decoder memory 8, and the decoding unit 9 reads out the amount that can be appropriately processed from here and follows the recording format of audio data such as mp3. The data is decoded and output from the audio output unit 10 as a signal that can be processed by the audio player.

  Further, the free space detector 15 determines whether or not the free space of the device decoder memory 8 is exhausted, or whether the free space has become a predetermined amount or less, that is, the audio data read by the magnetic head 4 of the HDD 1 in order. When the data is stored in the memory 8, it is detected whether or not the data is full with respect to the memory capacity or is equal to or less than a predetermined amount. Here, when it is detected that there is no free space, a signal is output to the HDD operation system control unit 16 that performs overall control of the HDD operation, and the HDD operation system control unit 16 illustrates the HDD external output enable / disable selection unit 6 as illustrated. The switch is turned off, that is, the data read by the magnetic head 4 of the HDD 1 is not output to the device decoder 7. The HDD external output availability selection unit 6 can be implemented in various modes such as being provided in the device decoder 7 in addition to the location shown in the figure.

  In this way, when the storage capacity of the device decoder memory 8 is full, in the conventional example of FIG. 5, the rotation drive control unit 17 stops the rotation drive of the motor 2 of the HDD 1. In the embodiment, the motor 2 is controlled to be continuously rotated without stopping. At this time, in the HDD operation system control unit 16, the magnetic head access control unit 12 switches from the control by the memory control unit 13 to the control by the non-memory control unit 14, and the device decoder memory 8 becomes full. The access position at that time, that is, the access end position is stored in the access end position storage unit 11.

  The non-memory control unit 14 in the magnetic head access control unit 12 repeatedly reads the data at the access end position, repeatedly reads data at other appropriate address portions, or selects as many consecutive address portions as possible on the disk. Then, control is performed so that the reading operation is performed and, if necessary, the portion is repeatedly read.

  As described above, while the motor of the HDD 1 is not stopped and the data at an appropriate position of the magnetic head is repeatedly read continuously, the data is transferred to the device decoder 7 by the output cutoff by the HDD external output enable / disable selection unit 6. Is never output. In this state, the audio data stored in the device decoder memory 8 is sequentially decoded by the decoding unit 9 and output from the audio output unit 10 to the audio signal processing unit. The data in the device decoder memory 8 decoded by the decoding unit 9 in this way is sequentially erased, and the device decoder 8 becomes gradually empty.

  The free space detection unit 15 constantly detects this state, and when it detects that the data in the device decoder memory 8 is almost empty or has become a predetermined amount or less, outputs a signal to the HDD operation system control unit 16. The HDD operation system control unit 16 switches from the operation of the non-memory control unit 14 currently operating in the magnetic head access control unit 12 to the operation of the memory control unit 13, and the memory control unit 13 stores the memory first. Based on the access end position stored in the access end position storage unit 11, the drive control of the head drive unit 3 is performed so as to sequentially read from the next access position. During the operation, the HDD cache function may be stopped depending on the situation.

  Also, the HDD operating system control unit 16 turns on the illustrated switch so that the data read by the HDD in the HDD external output enable / disable selection unit 6 can be output to the device decoder 7 side. As a result, the data is again stored in the device decoder memory 8, and the decoding process and the audio output in the decoding unit 9 are continued during that time. Thereafter, the free space detection unit 15 monitors the storage state of the device decoder memory 8, and when the memory is full, the HDD operation system control unit 16 operates so that the HDD external output enable / disable selection unit 6 does not output again. The magnetic head access control unit 12 performs control by the non-memory control unit 14 to repeatedly read the same data or repeatedly read the continuous address data portion as described above, and the motor continues to drive continuously. To do.

  A hard disk audio device composed of functional blocks as shown in FIG. 1 can implement the present invention by sequentially operating according to an operation flow as shown in FIG. 2, for example. That is, in the HDD audio playback output process, audio data is read sequentially from the HDD playback instruction portion (step S1) and recorded in the device decoder memory (step S2). Thereafter, it is determined whether or not the device decoder memory is full (step S3). When it is determined that the device decoder memory is not yet full, the process returns to step S1 and reading of audio data is continued in order.

  When it is determined in step S3 that the device decoder memory is full, the reading position in the HDD at that time, that is, the reading end position is recorded (step S4). In these processes, when the free space detection unit 15 in FIG. 1 monitors the data recording state of the device decoder memory 8 and detects that it is full, the HDD operating system control unit 16 detects the magnetic head access control unit 12. Thus, the access end position storage unit 11 stores the access position at that time.

  Next, reading is continued without storing the same data portion of the HDD or the continuous address data portion of the HDD (step S5). In the example of FIG. 1, the magnetic head access control unit 12 switches from the operation of the memory control unit 13 to the operation of the non-memory control unit 14 to read the same data portion or read consecutive address data portions. The HDD operation system control unit 16 cuts the output to the device decoder 7 side in the HDD external output enable / disable selection unit 6 at the same time.

  Next, the audio data recorded in the device decoder memory is decoded by the decoder, and the decoded audio data is output for audio signal processing (step S6). Thereafter, the record in the device decoder memory after the end of decoding is erased (step S7), and it is determined whether or not the free space of the device decoder memory has become a predetermined value or less (step S8). If it is determined in step S8 that the free space in the device decoder memory has not yet reached the predetermined value, the process returns to step S6 again to decode and output the audio data recorded in the device decoder memory, and the device decoder after decoding is completed. Repeat the operation to erase the memory record.

  When it is determined in step S8 that the free space in the device decoder memory has become equal to or less than the predetermined value, reading starts from the audio data next to the reading position when the device decoder memory is full (step S9), and the process returns to step S2 again to return to the device. A process of recording the read data in the decoder memory is performed, and the above operation is repeated. In these processes, the free space detector 15 shown in FIG. 1 monitors the free space in the device decoder memory 8 and detects that the free space is below a predetermined value, the magnetic head access controller 12 accesses the memory controller 13. The control is performed by reading the next data at the position stored in the end position storage unit 11 and switching the HDD external output enable / disable selection unit 6 to resume storage in the device decoder memory 8. Can do.

  In this embodiment, by operating as described above, the HDD is continuously and stably rotated without stopping during the audio output from the audio player, and fluctuations in current and voltage due to the stop and drive of the HDD are ensured. It is possible to prevent the occurrence of the shaking of the audio sound.

  Another embodiment of the present invention will be described with reference to the functional block diagram of FIG. Since the basic configuration of the apparatus shown in FIG. 3 is the same as that of the first embodiment shown in FIG. 1, the description of the same functional units is simplified. Also in the functional block diagram of the second embodiment shown in FIG. 3, the magnetic head 24 that moves the audio data recorded on the disk 25 that is rotationally driven by the motor 22 in the HDD 21 in the radial direction by the head drive unit 23. Thus, reading is sequentially performed under the control of the magnetic head access control unit 32.

  Audio data read by the magnetic head 24 of the HDD 21 is appropriately organized using a cache memory 26 and output to a device decoder memory 28 provided in a device decoder 27 in the audio player. The device decoder memory 28 used here has a sufficiently large capacity, and among the various audios, one piece of music of the POPS system that is often heard in vehicles is about 3 to 5 minutes. The compressed data such as mp3 has a capacity capable of recording at least more audio data.

  When capturing audio data at this time, the amount of data to be captured is determined depending on the capacity of the device decoder memory. In order to cope with track up / down at the time of song change, not only the next song but also the previous song It is preferable that the audio data of the song is also acquired and stored so as to correspond to the minimum operation.

  In the device decoder 27, the audio data input from the HDD as described above is recorded in the device decoder memory 28, and the decoding unit 29 reads out the amount that can be appropriately processed from here, and according to the recording format of the audio data such as mp3. The data is decoded and output from the audio output unit 30 as a signal that can be variously processed by the audio player.

  Further, the free space detection unit 33 detects whether the free space in the device decoder memory 28 has run out, or whether it has become a predetermined amount or less. As described above, when it is detected that one or more pieces of normal data are recorded in the device decoder memory 28 and there is no more free space, a signal is output to the HDD operating system control unit 35 that performs overall control of the HDD operation. In the HDD operation system control unit 35, the rotation drive control unit 36 stops the drive of the HDD motor 22. Further, the access position when the device decoder memory 28 is full, that is, the access end position is stored in the access position storage unit 31.

  In particular, in this embodiment, as will be described later, the audio data of the next song or the next song is read between the songs, which will be described later. Before the output of the first song, when the storage capacity of the device decoder memory 28 is about two songs, for example, the memory of the device decoder memory 28 is stored until it is full, and then the drive of the HDD motor 22 is stopped.

  The audio data stored in the device decoder memory 28 as described above is sequentially decoded by the decoding unit 29 and output from the audio output unit 30 to the audio signal processing unit. Data in the device decoder memory 28 that has been decoded by the decoding unit 29 is deleted in order. In this embodiment, at least in the first operation, it is preferable that all audio data from the first music is recorded in the device decoder memory, and the audio is output after the drive of the motor 22 is stopped as described above. The inter-song detecting unit 34 detects a state in which the audio data is sequentially output in this manner, and detects an inter-song including a silent part that ends one music and moves to the next music.

  When the inter-song detecting unit 34 detects the above inter-song interval and outputs the signal to the HDD operating system control unit 35, the HDD operating system control unit 35 drives the HDD motor 22 by the rotational drive control unit 36. Further, the magnetic head access control unit 32 performs control so that the HDD data is read from the access position next to the last access position previously stored in the access position storage unit 31.

  As a result, the data read again by the HDD 21 is accumulated in the device decoder memory 28. However, the compressed audio data has a small data capacity, and the use of a high-speed HDD in recent years is 3 seconds which is a normal interval between songs. It is possible to read and store the data for the next one song sufficiently between the songs. Note that the recording of audio data in the device decoder memory 28 is set so that one song can be sufficiently recorded between songs, but the memory of the song after the song is still being recorded. When it is detected that the interval between music pieces of audio output has been completed in a state where is not full, the drive of the HDD is preferably stopped at that point.

  Even at this time, the free space detection unit 33 monitors the state of free space in the device decoder memory 28. When the device decoder memory 8 becomes full, the drive of the HDD motor 22 is stopped in the same manner as described above, and the reading is completed. The current access position is stored in the access position storage unit 31 and the reading is terminated.

  In the second embodiment shown in FIG. 3, for example, the operation can be sequentially performed according to the operation flow shown in FIG. That is, in the example shown in FIG. 4, at the time of HDD audio playback output processing, audio data is first read sequentially from the playback instruction portion of the HDD as in the first embodiment shown in FIG. 2 (step S11). Then, data for at least one piece of music is sequentially recorded in the device decoder memory (step S12). Thereafter, it is determined whether or not the device decoder memory is full (step S13). If it is determined that the device decoder memory is not yet full, the process returns to step S1 and reading of audio data and recording in the memory are continued in order.

  When it is determined in step S13 that the device decoder memory is full, the reading position in the HDD at that time, that is, the reading end position is recorded (step S14), and the drive of the HDD motor is stopped (step S15). In these processes, when the free capacity detection unit 33 in FIG. 3 monitors the data recording state of the device decoder memory 28 and detects that it is full, the HDD operation system control unit 35 detects the magnetic head access control unit 32. Accordingly, the access position at that time is stored in the access end position storage unit 31 and the rotation drive control unit 36 stops the rotation drive of the motor 22 of the HDD 21.

  Next, the audio data recorded in the device decoder memory is decoded by the decoder, and the decoded audio data is output for audio signal processing (step S16). Thereafter, the record in the device decoder memory after the end of decoding is erased (step S17), and it is determined whether or not the audio output is between songs (step S18). Here, when it is determined that the audio output is not yet in the tune, the process returns to step S16 again to decode and output the audio data recorded in the device decoder memory, and to erase the decoded data from the device decoder memory. repeat.

  When it is determined in step S18 that the audio output is between songs, the HDD is rotated (step S19), and reading of the next audio data is resumed from the reading position when the HDD is stopped (step S20). Thereafter, the process returns to step S12. Since data for one song has been erased from the device decoder memory in advance, data for at least one song is recorded in order to supplement it. Thereafter, the same operation as described above is repeated.

  In these processes, when the inter-song detection unit 34 in FIG. 3 monitors the audio output and detects that the inter-song between the songs is detected, the HDD operation system control unit 35 performs the rotation of the HDD 21 by the rotation drive control unit 36. A device decoder memory in which the motor is driven to rotate, the position previously stored by the magnetic head access control unit 32 is read from the access position storage unit 31 and read sequentially from the next access position, and the read data is recorded The HDD operating system control unit performs the operation of monitoring the 28 data by the free capacity detecting unit 33 and ending the reading of the HDD when it becomes full.

  In this embodiment, as described above, since the rotation of the HDD is driven and stopped only when the audio output from the audio player is between songs, the audio sound due to the current and voltage fluctuations caused by the stop and drive of the HDD is performed. Can be reliably prevented.

  The hard disk audio device according to the present invention can be used particularly effectively as an audio device in a vehicle equipped with an HDD type car navigation device that uses data recorded in an HDD. The present invention can also be effectively used for an audio device using a player or a general household HDD.

It is a functional block diagram of 1st Example of this invention. It is an operation | movement flowchart of the 1st Example. It is a functional block diagram of 2nd Example of this invention. It is an operation | movement flowchart of the 2nd Example. It is a functional block diagram of a prior art example.

Explanation of symbols

1 HDD
2 motor 3 head drive unit 4 magnetic head 5 disk 6 HDD external output enable / disable selection unit 7 device decoder 8 device decoder memory 9 decode unit 10 audio output unit 11 access end position storage unit 12 magnetic head access control unit 13 memory control unit 14 Non-memory control unit 15 Free capacity detection unit 16 HDD operation system control unit 17 Rotation drive control unit

Claims (5)

A hard disk device comprising a disk for recording audio data and rotating by a motor, and a magnetic head for reading the data recorded on the disk;
A device decoder comprising: a device decoder memory for recording audio data read by the magnetic head; and a decoding means for decoding while erasing after sequentially reading the data of the device decoder memory;
When the free space detecting means for detecting the free space of the device decoder memory detects that the free space of the device decoder memory is equal to or less than a predetermined value, the magnetic head continues to rotate the hard disk motor. Recording of the read audio data in the device decoder memory is stopped, and the audio data read by the magnetic head is detected when the free capacity detecting means detects that the free capacity of the device decoder memory is equal to or larger than a predetermined value. A hard disk audio device comprising: control means for continuing the rotational drive of a hard disk motor during audio output from the audio device by recording in a decoder memory.   2. The hard disk apparatus according to claim 1, wherein when recording audio data read by the magnetic head in a device decoder memory is stopped, the magnetic head repeatedly reads the same data.   2. The hard disk apparatus according to claim 1, wherein when recording audio data read by the magnetic head in a device decoder memory is stopped, the magnetic head reads data at consecutive addresses. A hard disk device comprising a disk for recording audio data and rotating by a motor, and a magnetic head for reading the data recorded on the disk;
A device decoder comprising: a device decoder memory for recording audio data read by the magnetic head; and a decoding means for decoding while erasing after sequentially reading the data of the device decoder memory;
When the free space detecting means for detecting the free space of the device decoder memory detects that the free space of the device decoder memory is equal to or greater than a predetermined value, the rotation drive of the hard disk motor is stopped and the audio output music By recording the audio data read by the magnetic head by driving the motor of the hard disk only while detecting that the audio output is between songs by the song detection means for detecting the interval, A hard disk audio device comprising: control means for stopping rotation of a hard disk motor during audio output from the audio device. 5. The hard disk audio device according to claim 4, wherein the device decoder memory records the audio data of the previous song in addition to the next song.

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