JP2005149601A - Information reproducing apparatus and information reproducing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information reproducing apparatus and an information reproducing method which can perform repeat reproduction of short music by keeping a recorded information read-out means in an off-state and can suppress power consumption when performing repeat reproduction of short music and can stop exhaustion of a battery. <P>SOLUTION: When selection input for one music in a repeat mode is performed from an operation unit 13, a control microcomputer 9 distinguishes whether all the sound data of music of choice can be stored in a memory 10 by referring to the TOC information. When all the sound data of the music of choice can be stored in the memory 10, a power shutdown section 12 intercepts power supply to a recorded information read-out means after all the sound data of the music of choice is stored in the memory 10, and the control microcomputer 9 performs repeat reproduction of the sound data stored in the memory 10 by controlling a signal processing circuit 5 in the off-state of the recorded information read-out means. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a mini-disc reproducing apparatus (hereinafter referred to as MD) that reads out information from a recording medium such as a mini-disc (MD) that is digitally recorded by compressing information such as audio data on the time axis, expands the time axis, and reproduces the information. In particular, an information reproducing apparatus and an information reproducing method having a one-track repeat mode for repeatedly reproducing one song selected from a plurality of songs recorded on an MD. About.

  2. Description of the Related Art Conventionally, in an information reproducing apparatus such as an MD reproducing apparatus, a mode in which a plurality of songs recorded on the MD are reproduced in the order of recording, a mode in which any desired music selected directly after the music selection is reproduced in the order of recording, A plurality of playback modes such as a mode for randomly playing back a plurality of songs can be selected. Usually, among a plurality of selectable playback modes, any desired song selected is normally repeatedly played 1 Song repeat mode is included.

  An information reproducing apparatus having a one-track repeat mode has a memory for storing a signal read from a disk, and makes a signal written to the memory faster than a signal read from the memory. It has been proposed to read the signal after the signal is written to make the time required to move the pickup apparently and to significantly reduce the waiting time (see, for example, Patent Document 1).

However, in the prior art, it is necessary to read information from the disc every time data for one song is repeated regardless of the length of the desired song to be repeated, so recording is performed when information is read from the disc. The information reading means is turned on each time the disk is read, and even when a short song is played repeatedly, power is consumed and the battery is consumed faster than when a long song is played repeatedly. There was a problem that.
Japanese Patent Laid-Open No. 9-198789

  The present invention has been made in view of such problems, and an object of the present invention is to provide a record information reading means for reading information from a disc if the information read from the disc is a data amount that can be stored in a memory. An information reproducing apparatus and information reproducing method that can always be turned off and repeat playback of a short song, and when repeating short song playback, can reduce power consumption and battery consumption. The point is to provide.

In order to solve the above problems, the present invention has the following configuration.
The information reproducing apparatus of the present invention comprises recording information reading means for reading audio data recorded on a recording medium after time axis compression, and storage means for temporarily storing the audio data read by the recording information reading means. An information reproducing apparatus having signal processing means for reproducing the audio signal by decompressing and compressing the audio data stored in the storage means to reproduce the audio signal 1 During the music repeat mode, the storage means for determining whether or not all of the audio data of the desired song can be stored in the storage means, and the audio of the desired song is stored in the storage means by the storage capacity determination means. When it is determined that all of the data can be stored, the power to the recording information reading unit is stored after all the audio data of the desired song is stored in the storage unit. ; And a power cutoff unit for cutting off the supply, the signal processing means, characterized in that repeated reproduction of the audio data of the desired music stored in the storage means.

  Furthermore, in the information reproducing apparatus of the present invention, the storage capacity determination unit can store all the audio data of the desired song in the storage unit by referring to the TOC information recorded in the recording medium. It is characterized by determining whether or not.

  Furthermore, in the information reproducing apparatus of the present invention, the storage capacity determination unit is configured to store the audio data recorded at the start address when the audio data recorded at the end address is written into the storage unit. It is determined whether or not all of the audio data of the desired song can be stored in the storage unit by determining whether or not the state is stored in the storage unit.

  In the information reproducing method of the present invention, the audio data recorded on the recording medium after being compressed on the time axis is read by the recording information reading means, and the read audio data is temporarily stored in the storage means. An information reproduction method for reproducing an audio signal by decompressing and compressing the stored audio data on a time axis, and in the one-repeat repeat mode for repeatedly reproducing a selected desired song, the desired information is stored in the storage means. It is determined whether or not all of the audio data of a song can be stored, and when it is determined that all of the audio data of the desired song can be stored in the storage unit, After storing all of the audio data, the power supply to the recorded information reading means is cut off, and the audio data of the desired song stored in the storage means is repeatedly reproduced. To.

  In the information reproducing apparatus and the information reproducing method of the present invention, when all of the audio data of the desired song can be stored in the memory in the 1-tune repeat mode, after all the audio data of the desired song is stored in the memory, By turning off the power supply to the recording information reading means and repeating the audio data stored in the memory, the recording information reading means for reading information from the mini-disc is in the OFF state and the short song repeats. When playback can be performed and repeat playback of a short song is performed, power consumption can be suppressed, and battery consumption can be suppressed.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

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

  In the present embodiment, referring to FIG. 1, information reproduction such as an MD reproduction apparatus that reads audio data from a mini-disc 1 on which time-axis compressed audio data (information) is digitally recorded and outputs the audio from headphones 2. As a device, a pickup 3, an RFIC 4, a signal processing circuit 5, a driver circuit 6, a spindle motor 7, a feed motor 8, a control microcomputer 9 as a system control microcomputer, and a shock proof memory A functioning memory 10, an audio amplifier 11, a power cutoff unit 12, and an operation unit 13 are included.

  The pickup 3, RFIC 4, driver circuit 6, spindle motor 7, and feed motor 8 are recording information reading means for reading audio data from the mini disk 1. During reproduction, the mini disk 1 is driven by the driver circuit 6. The pickup 3 is fed in the radial direction of the mini disc 1 by the feed motor 8 driven by the driver circuit 6 and rotated by the driven spindle motor 7, and the sound recorded on the mini disc 1 by the pickup 3. Data is read out. The signal read by the pickup 3 is amplified by the RFIC 4 and sent to the signal processing circuit 5.

  The RFIC 4 generates servo control signals such as a focus error signal and a tracking error signal from the signal read from the pickup 3, and generates the servo control signal and a system control microcomputer (hereinafter referred to as a control microcomputer). The driver circuit 6 is controlled by the control signal from the control circuit 9 so that the focus, tracking and spin servos are applied. The driver circuit 6 controls the pickup 3, the feed motor 8 and the spindle motor by the control signal from the RFIC 4. 7 is driven.

  The signal processing circuit 5 demodulates the signal amplified by the RFIC 4, performs signal processing such as error correction, and sequentially writes the signal subjected to signal processing in the memory 10. In the present embodiment, a 16 Mbit D-RAM is used as the memory 10.

  Further, the signal processing circuit 5 reads the audio data stored in the memory 10 as a memory reading means, and decompresses the compressed data by expanding the time axis according to a predetermined format. In the present embodiment, the signal processing circuit 5 includes a function for converting a digital signal into an analog signal and generating an audio signal. The generated audio signal is output from the headphones 2 through the audio amplifier 11.

  When the voice data in the memory 10 is full, the control microcomputer 9 a) a signal processing circuit so that the voice data read from the mini disk 1 by the pickup 3 is not stored in the memory 10 for a predetermined time thereafter. 5) b) When reading of the audio data from the mini-disc 1 is stopped and the audio data is not stored in the memory 10, and a predetermined amount of free space is generated in the memory 10, the capacity of the pickup 3 is increased. When the signal becomes full, the signal processing circuit 5 is controlled so as to jump to the track at the position where the reading of the sound data is stopped and to store the sound data read from the disk 1 by the pickup 3 in the memory 10 again. By this control, shock proof data is always secured in the memory 10.

  When the mini-disc 1 is loaded, the control microcomputer 9 reads out and stores the TOC information recorded in the TOC (Table Of Contents) area of the mini-disc 1 by the pickup 3, and operates the operation unit 13. When performing song sending, song returning, song selection, etc. based on the above, by referring to the TOC information, the pickup 3 is moved to the start address of the desired song and the audio data of the desired song is read out.

  Further, when the desired song is selected and the 1-track repeat mode is selected and input, the control microcomputer 9 refers to the TOC information to determine whether or not all the audio data of the desired song can be stored in the memory 10. If all of the audio data of the desired song can be stored in the memory 10, when all of the audio data of the desired song is stored in the memory 10, a power cutoff signal is output to the power cutoff unit 12. When one-track repeat is canceled by the operation unit 13, a power return signal is output to the power shut-off unit 12.

  When the power cutoff signal is input from the control microcomputer 9, the power cutoff unit 12 cuts off the power supply to the recording information reading means, that is, the RFIC 4 and the driver circuit 6, and drives the pickup 3, spindle motor 7 and feed motor 8. Stop. Further, when a power supply return signal is input from the control microcomputer 9, the power shut-off unit 12 restarts the power supply to the recording information reading means, that is, the RFIC 4 and the driver circuit 6, and the pickup 3, spindle motor 7, and feed motor 8 are turned on. Drive.

  The operation unit 13 is an input means for a user to input instructions for song advance, song return, song selection, etc., and any one of a plurality of playback modes including a single song repeat mode for repeatedly playing any desired song selected. It has the function to select and input.

Next, the operation at the time of one-track repeat according to the present embodiment will be described in detail with reference to FIG.
FIG. 2 is a flowchart for explaining the operation at the time of one-track repeat of the embodiment of the information reproducing apparatus according to the present invention.

  When the selection of the desired music and the selection of the 1-track repeat mode are input from the operation unit 13 (step A1), the control microcomputer 9 moves the pickup 3 to the start address of the desired music and transfers the audio data of the desired music to the mini disk. 1 is read to start playback of the desired song (step A2), and by referring to the TOC information (step A3), it is determined whether or not all the audio data of the desired song can be stored in the memory 10 (step A3). Step A4).

  If all of the audio data of the desired song can be stored in the memory 10, it is detected that all of the audio data of the desired song has been stored in the memory 10 (step A5), and the audio data of the desired song is stored in the memory 10. Is stored, a power cutoff signal is output to the power cutoff unit 12 (step A6).

  When a power cut-off signal is input from the control microcomputer 9, the power cut-off unit 12 cuts off the power supply to the recording information reading means, that is, the RFIC 4 and the driver circuit 6 to drive the pickup 3, the spindle motor 7 and the feed motor 8. The control microcomputer 9 controls the signal processing circuit 5 to repeat the audio data stored in the memory 10 while the recording information reading means is OFF (step A7).

  For example, when the signal processing circuit 5 is configured to solve the time axis compression at a speed of 0.3 Mbit / s, in the case of the present embodiment, the memory 10 is 16 Mbit, so that the reproduction time is about Data for 53 seconds can be stored, and if the length of the desired song to repeat one song is within 53 seconds, the power supply to the recording information reading means is cut off at the time of one song repeat and the power consumption is suppressed. Battery consumption can be reduced.

  When the cancel input of the 1-track repeat mode is performed from the operation unit 13 (step A8), the control microcomputer 9 outputs a power supply return signal to the power supply cutoff unit 12 (step A9), and the power supply cutoff unit 12 When the power supply return signal is input from, the supply of power to the recording information reading means, that is, the RFIC 4 and the driver circuit 6 is resumed to drive the pickup 3, the spindle motor 7 and the feed motor 8 to end the one-track repeat mode.

  If not all of the audio data of the desired song can be stored in the memory 10, the control microcomputer 9 reads out the audio data from the mini disk 1 every time and repeats the reproduction (step A10). When the cancel input is performed (step A11), the one-track repeat mode is terminated.

  As described above, according to the present embodiment, when all of the audio data of the desired song can be stored in the memory 10 in the 1-track repeat mode, all of the audio data of the desired song is stored in the memory 10. Recorded information for reading information from the mini-disc 1 by storing the power to the record information reading means by the power shut-off unit 12 after the storage and repeating the audio data stored in the memory 10 When the reading unit is in the OFF state, repeat playback of a short song can be performed. When repeat playback of a short song is performed, power consumption can be suppressed and battery consumption can be suppressed.

  In the present embodiment, it is configured to determine whether or not all of the audio data of the desired song can be stored in the memory 10 by referring to the TOC information. However, the audio data recorded in the end address is Whether or not all of the audio data of the desired song can be stored in the memory 10 by determining whether or not the audio data recorded in the start address is stored in the memory 10 when written to the memory 10. You may comprise so that it may determine.

  Note that the present invention is not limited to the above-described embodiments, and it is obvious that the embodiments can be appropriately changed within the scope of the technical idea of the present invention. In addition, the number, position, shape, and the like of the constituent members are not limited to the above-described embodiment, and can be set to a suitable number, position, shape, and the like in practicing the present invention. In each figure, the same numerals are given to the same component.

It is a block diagram which shows the structure of embodiment of the information reproduction apparatus which concerns on this invention. It is a flowchart for demonstrating the operation | movement at the time of 1 music repeat of embodiment of the information reproduction apparatus which concerns on this invention.

Explanation of symbols

1 Mini Disc 2 Headphone 3 Pickup 4 RFIC
5 Signal processing circuit 6 Driver circuit 7 Spindle motor 8 Feed motor 9 Control microcomputer (memory capacity discrimination means)
10 Memory (memory means)
11 Audio amplifier 12 Power cutoff unit 13 Operation unit

Claims (4)

Recording information reading means for reading audio data recorded on the recording medium after time axis compression, storage means for temporarily storing the audio data read by the recording information reading means, and stored in the storage means An information reproducing apparatus comprising: a signal processing unit that decompresses the audio data in time and decompresses the compressed audio data to reproduce the audio signal;
A storage capacity discriminating unit for discriminating whether or not all of the audio data of the desired song can be stored in the storage unit at the time of one-track repeat mode for repeatedly reproducing the selected desired song;
When it is determined by the storage capacity determining means that all of the audio data of the desired song can be stored in the storage means, all of the audio data of the desired song is stored in the storage means. A power shut-off means for shutting off the power supply to the recorded information reading means;
The information processing apparatus, wherein the signal processing means repeats the audio data of the desired song stored in the storage means.   The storage capacity determination means determines whether or not all of the audio data of the desired song can be stored in the storage means by referring to the TOC information recorded on the recording medium. The information reproducing apparatus according to claim 1.   The storage capacity discriminating means determines whether the audio data recorded at the start address is stored in the storage means when the audio data recorded at the end address is written into the storage means. The information reproducing apparatus according to claim 1, wherein it is determined whether or not all of the audio data of the desired song can be stored in the storage unit. Audio data recorded with time axis compression on a recording medium is read by a recording information reading unit, the read audio data is temporarily stored in a storage unit, and the audio data stored in the storage unit is An information reproducing method for decompressing and decompressing and reproducing an audio signal,
Determining whether or not all of the audio data of the desired song can be stored in the storage means at the time of one-track repeat mode for repeatedly playing the selected desired song;
If it is determined that all of the audio data of the desired song can be stored in the storage means, after all the audio data of the desired song is stored in the storage means, Shut off the power supply,
An information reproducing method comprising: repeatedly reproducing the audio data of the desired song stored in the storage means.

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