WO2005043540A1 - Acoustic device - Google Patents

Acoustic device Download PDF

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Publication number
WO2005043540A1
WO2005043540A1 PCT/JP2004/015805 JP2004015805W WO2005043540A1 WO 2005043540 A1 WO2005043540 A1 WO 2005043540A1 JP 2004015805 W JP2004015805 W JP 2004015805W WO 2005043540 A1 WO2005043540 A1 WO 2005043540A1
Authority
WO
WIPO (PCT)
Prior art keywords
reproduction
power supply
solar cell
acoustic device
memory
Prior art date
Application number
PCT/JP2004/015805
Other languages
French (fr)
Japanese (ja)
Inventor
Shuji Miyasaka
Original Assignee
Matsushita Electric Industrial Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co., Ltd. filed Critical Matsushita Electric Industrial Co., Ltd.
Priority to JP2005515123A priority Critical patent/JPWO2005043540A1/en
Publication of WO2005043540A1 publication Critical patent/WO2005043540A1/en

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/102—Programmed access in sequence to addressed parts of tracks of operating record carriers
    • G11B27/105—Programmed access in sequence to addressed parts of tracks of operating record carriers of operating discs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/36—Monitoring, i.e. supervising the progress of recording or reproducing

Definitions

  • the present invention relates to an audio device provided with a solar cell as a driving power source, and more particularly to an audio device such as a portable audio player which is easy to carry.
  • Patent Document 1 discloses a solar battery type voice guide device that outputs sound using a solar cell and a rechargeable battery charged by the solar cell as a driving power source.
  • Patent Document 2 an audio player is integrated with a hat, a solar battery is incorporated in a brim portion of the hat, and a hat-integrated type using the solar cell as a driving power source is provided.
  • An acoustic device is disclosed.
  • Patent Document 1 JP-A-2002-51480
  • Patent Document 2 JP 2002-291084 A
  • Patent Document 1 when the operation of the device is restarted after the power supply is cut off, the reproduction state at the time of the power supply cut off is lost, and thus the power supply is cut off. Can not resume regeneration. In other words, once the power supply is insufficient, even if the power is restored, Can not.
  • the power supply state is more unstable than that of a dry cell or a rechargeable battery.
  • the present invention has been made in view of such a conventional problem, and uses a solar cell as a driving power source. Even when the power supply is insufficient and the reproduction is stopped, the power is again supplied. It is a first object of the present invention to provide an audio device that can be reproduced from a point in time when power supply is insufficient when power supply is restored.
  • an audio device is an audio device provided with a solar cell as a drive power supply module, and includes a recording medium on which audio data is recorded, and a recording medium on the recording medium.
  • a reproduction unit for reproducing the reproduced audio data, a memory for storing reproduction position information indicating a reproduction position of the reproduced audio data, and a timing for storing the reproduction position information in the memory.
  • Recording means for recording the reproduction position information in the memory, wherein the reproduction means stops reproduction when the power supply from the solar cell is insufficient, and the power supply of the solar cell power is restored. In this case, the reproduction is resumed based on the reproduction position information recorded in the memory.
  • the reproducing unit stops the reproduction, and when the power supply is restored, the reproducing unit reads the reproduction position information stored in the memory to perform the reproduction. Can be resumed from the point at which playback stopped.
  • the drive power supply module of the audio device further includes a rechargeable battery or a dry battery, and the memory receives power supply from at least the rechargeable battery or the dry battery.
  • the reproduction position information recorded in the memory by the recording unit is held by the rechargeable battery or the dry battery.
  • the audio device further includes a detecting unit that detects at least one of a voltage level, a current level, and a power level supplied by the driving power supply module, and the recording unit includes: When the value detected by the detection means falls below a predetermined value, the reproduction position information is recorded in the memory.
  • the recording unit may store the reproduction position information in the memory only when the detection unit detects that the power supply is insufficient.
  • the recording device provided in the audio device according to the present invention is characterized in that the reproduction position information is recorded in the memory before the power supply of the rechargeable battery or the dry battery power is insufficient.
  • the playback position information is recorded in the memory while power is supplied from the rechargeable battery or the dry battery.
  • the reproducing means included in the audio device according to the present invention performs reproduction using the first reproduction mode at least when the detection value of the detection means is equal to or more than a predetermined value, and If the detected value is less than the predetermined value, the reproduction is performed in the second reproduction mode which consumes less power during reproduction than in the first reproduction mode.
  • the reproducing unit can perform reproduction in two modes, that is, the first reproduction mode, which is a normal reproduction mode, and the second reproduction mode, which is power-saving reproduction. Cutting can be prevented as much as possible.
  • the first reproduction mode of the audio device according to the present invention is reproduction using a reproduction band expansion technique
  • the second reproduction mode is reproduction without using a reproduction band expansion technique.
  • the reproduction using the reproduction band expansion technology is performed according to the MPEG standard AAC.
  • the audio device is characterized in that the first reproduction mode is reproduction for reproducing low frequency components, and the second reproduction mode is reproduction for not reproducing low frequency components. I do.
  • the first playback mode of the audio device according to the present invention is playback with stereophonic processing
  • the second playback mode is playback without stereophonic processing. I do.
  • the rechargeable battery or the dry battery included in the acoustic device according to the present invention is configured such that when a time required for storing the playback position information in the memory is T, power is supplied from the solar cell. When the shortage occurs, at least the T time has a capacity capable of supplying electric power.
  • the acoustic device further includes a charging unit that charges power supplied from the solar cell, and the reproducing unit performs the reproduction by receiving power supply from the charging unit. It is characterized.
  • the drive power supply module of the acoustic device according to the present invention is configured in a planar manner, and the solar cells are attached to both front and back surfaces of the drive power supply module. Further, the drive power supply module of the acoustic device according to the present invention is constituted by a polyhedron, and the solar cell is attached to at least a part of the surface of the polyhedron.
  • the solar cells are arranged on the surface of the power supply module configured in a planar or multi-sided manner, so that the light collection efficiency is improved.
  • the acoustic device further includes headphones for outputting the audio data reproduced by the reproducing means, and the solar battery is attached to a cable connecting the headphones and the reproducing means. It is characterized by
  • the audio device further includes headphones for outputting the audio data reproduced by the reproducing means, and the solar cell and the headphones are connected so as to be integrated! It is characterized by
  • the recording medium and the memory of the acoustic device according to the present invention are characterized by being nonvolatile semiconductor memories.
  • the size can be reduced by using a nonvolatile semiconductor memory as the recording medium.
  • the reproduction position information recorded in the memory is not lost, and the reproduction means stops reading by reading the memory. It is possible to recover the reproduction of the reproduced reproduction position force.
  • the acoustic device according to the present invention is further characterized by further comprising a stopper for fixing the driving power supply module at a desired position.
  • the solar cell can be fixed at a desired position by the stopper, and the light collection efficiency for the solar cell can be increased.
  • the present invention may be realized as a reproduction method using the characteristic means of the audio device as steps, or as a program for causing a computer to execute each step. You can also. Needless to say, such a program can be distributed through a recording medium such as a CD-ROM or a transmission medium such as the Internet. The invention's effect
  • the acoustic device according to the present invention uses a solar cell, even when power supply is insufficient.
  • the playback state can be ensured.
  • FIG. 1 is an external view of an audio player according to Embodiment 1.
  • FIG. 2 is a diagram showing a configuration of an audio player according to the first embodiment.
  • FIG. 3 is a flowchart showing an operation procedure at the time of reproduction of the audio player according to the first embodiment.
  • FIG. 4 is a functional block diagram when the audio player has a rechargeable battery for charging power from a solar cell.
  • FIG. 5 is a functional configuration diagram of the audio player according to the first embodiment.
  • FIG. 6 is a modified example of the configuration of the audio player according to the first embodiment.
  • FIG. 7 is a reference diagram of an audio player having a cable with a stopper.
  • FIG. 8 (a) is a reference drawing in which a solar cell is attached to a cylindrical polyhedral body.
  • Fig. 8 (b) is a reference drawing in which a solar cell is attached to the surface of a cube.
  • FIG. 9 (a) is an explanatory view of a condenser lens detachably mounted on the surface of a solar cell.
  • FIG. 9B is an external view of an audio player dedicated stand according to the first embodiment.
  • FIG. 10 is a diagram showing a functional configuration of an audio player according to a second embodiment.
  • FIG. 11 is a data configuration diagram of audio data recorded on a recording medium according to a second embodiment.
  • FIG. 12 is a flowchart showing a reproducing operation procedure of the audio player according to the second embodiment. chart.
  • FIG. 1 shows an external view of an audio player 10 according to the first embodiment.
  • the audio player 10 is a device that includes a solar cell as a driving power supply and performs a reproduction process of music or the like by supplying power from the solar cell.
  • FIG. 2 is a diagram showing a functional configuration of the audio player 10 according to the first embodiment.
  • the audio player 10 is a sound device that reproduces music or the like using a solar cell as a driving power supply, and includes a recording medium 100 on which audio data is recorded, and a reproduction device that reproduces audio data recorded on the recording medium 100. 101, drive to supply power to playback device 101
  • a power supply module 102, a solar cell 103 for converting sunlight or the like into electric power, and a memory 104 for storing reproduction position information indicating a reproduction position of audio data reproduced / reproduced by the reproducing device 101 are provided.
  • FIG. 3 is a flowchart showing an operation procedure at the time of reproduction of the audio player 10 according to the first embodiment.
  • the recording medium 100 stores audio data as a sound source.
  • the recording medium 100 is, for example, a semiconductor memory card, and it is preferable that the audio data is a digitally compressed and encoded signal in order to reduce the size and cost of the device.
  • the recording medium 100 may be a disk medium such as a hard disk or an optical disk, and the audio signal may be an uncompressed PCM signal.
  • the playback device 101 reads out and plays back audio data recorded on the recording medium 100 (S301). For example, an address for sequentially reading audio data is transmitted from the reproducing device 101 to the recording medium 100, and the reproducing device 101 receives the audio data read based on the address and reproduces the audio data.
  • the reproducing device 101 decodes the signal that has been compression-encoded.
  • the signal is compression-encoded by the AAC (Advanced Audio Coding) method, it is decoded according to the AAC decoding procedure (ISO 13818-7).
  • AAC Advanced Audio Coding
  • the reproducing device 101 sequentially records the reproduction position information indicating the reproduction position of the audio data being reproduced in the memory 104 (S302).
  • the playback position information may be, for example, an address at which the playback device 101 reads out audio data from the recording medium 100, or a code (eg, tag information) associated with the address. Alternatively, it may be the identification code of the content currently being played (or the song in the case of music data)! /.
  • the drive power supply module 102 has a solar cell 103 and supplies power to the recording medium 100, the playback device 101, and the memory 103.
  • the driving power supply is a solar cell
  • the power supply amount fluctuates depending on the amount of light which is not always stable. May stop. Conversely, the possibility of power supply returning in a very short time is also increased.
  • the reproducing apparatus 101 acquires the reproduction position information recorded in the memory 104 (S305), and based on the reproduction position information, The reproduction of the audio data is continued (S306).
  • the memory 104 is preferably a non-volatile memory that can retain data even when the power supply of a flash memory or the like is stopped, but may have a configuration as shown in FIG. 4 below. .
  • FIG. 4 is a functional block diagram in the case where the audio player 11 includes a battery 105 for charging power from the solar cell 103.
  • the driving power supply module 102 in FIG. 4 also includes a built-in rechargeable battery 105, and when the amount of power generated from the solar cell 103 is insufficient, the rechargeable battery 105 holds the reproduction position information in the memory 104. can do.
  • the electric power supplied from the rechargeable battery 105 may be supplied to the recording medium 100 and the reproducing device 101, and the reproduction may be continued even when the amount of power generated from the solar cell 103 is insufficient.
  • the rechargeable battery 105 may be a dry battery or the like.
  • the processing for always storing the reproduction position information in the memory 104 is performed, but the processing is supplied by the drive power supply module 102 as in the audio player 12 shown in FIG.
  • a detecting device 106 for detecting a voltage level, a current level, or a power level is provided, and the reproduction position information is stored in the memory 104 only when the power value detected by the detecting device 106 falls below a predetermined power value. You may do so.
  • this configuration unlike the audio player 10 shown in FIG. 2, it is not necessary to always perform the process of writing the reproduction position information to the memory 104 regardless of the power supply state.
  • At least the capacity of the rechargeable battery 105 is stored in the memory 104 as the playback position information. It is only necessary to have the ability to supply power for the time to write the information, so an extremely inexpensive and small-capacity rechargeable battery is sufficient!
  • the audio player as described above may be used as a portable device in combination with headphones, and FIG. 6 shows a modification of the configuration of the audio player 13 according to the first embodiment. Tepuru.
  • drive power supply module 102 and solar cell 103 to cable 601 connecting headphone 107 and playback device 101. Since the position of the cable 601 can be easily changed even when headphones are mounted, the drive power supply module 102 can be appropriately moved in a direction that easily receives sunlight, and power can be efficiently supplied by sunlight.
  • FIG. 7 shows a reference diagram of an audio player having a cable 601 and a stopper 701.
  • the stopper 701 for fixing the driving power supply module 102 in a direction that is easy to receive sunlight is provided, the driving power supply module 102 is fixed by the stopper 701 so that the position of the tie is fixed by, for example, a tie pin. You can! / With this configuration, it is possible to more efficiently condense sunlight to solar cell 601.
  • the drive power supply module 102 may be configured in a plane, and the solar panels may be arranged on both front and back surfaces to increase the light collection efficiency.
  • FIG. 8 is a reference diagram for explaining various shapes of solar cells provided in the audio player according to the present embodiment.
  • the drive power supply module may be made up of a polyhedron, and a solar panel may be arranged on at least a part of the surface thereof to increase the light collection efficiency.
  • FIG. 8 (a) shows a reference diagram in which a solar cell 702 is attached to a cylindrical polyhedral body.
  • FIG. 8B shows a reference diagram in which a solar cell 703 is attached to the surface of a cube.
  • a shape having both light-collecting efficiency and good external appearance such as making the shape of the solar cell a diamond-shaped solid.
  • FIG. 9 is a reference diagram of a drive power supply module including a condenser lens for improving the condenser efficiency to a solar cell.
  • FIG. 9 (a) shows the theory of the condenser lens 901 which is detachably mounted on the surface of the solar cell 103.
  • the condenser lens 901 is fixed to the solar cell 103 using a fixture 902, and is attached to a position where light is focused on the solar panel. That is, by using the condensing lens 901 with the use of the audio player, the light is efficiently condensed on the solar cell by using the condenser lens 901 to improve the charging efficiency. be able to.
  • FIG. 9 (b) shows an external view of a dedicated table of the audio player according to the first embodiment.
  • the dedicated holder 903 is equipped with a condenser lens 903a for improving the efficiency of condensing sunlight, and by placing the audio player in the storage recess 903b when not in use, it is more efficient. It is possible to charge the solar cell in a short time.
  • the audio player according to the present embodiment is provided with memory 104 for recording the playback position information of the audio signal.
  • the listener can listen to the continuation of the audio data when the power is restored after the interruption of the power supply, and the listener can be inconvenienced as little as possible.
  • the audio player detects the power level, and only records the playback position in memory 104 when the power level falls below the predetermined power level. There is no need to sequentially record position information, and power can be consumed more efficiently.
  • the shape of a solar cell included in the audio player according to the present invention into a planar or a cubic polyhedron, the light collection efficiency can be improved as an audio player having an appearance easily supplied with sunlight. It is possible to use the solar power more efficiently by improving.
  • the audio player according to the second embodiment includes a detecting device for detecting a power level, and the reproducing device performs reproduction in a reproducing mode corresponding to the power level detected by the detecting device.
  • FIG. 10 is a diagram showing a functional configuration of the audio player 14 according to the second embodiment.
  • Audio data is recorded on a recording medium 100 constituting the audio player 14, and a reproducing device 101 reproduces the audio data recorded on the recording medium 100.
  • the driving power supply module 102 supplies power from the solar cell 103 to the reproducing device 101 and the detecting device 106.
  • the solar cell 103 converts sunlight into electric power.
  • the detecting device 106 detects a voltage level, a current level, or a power level supplied to the reproducing device 101.
  • FIG. 11 shows a data configuration diagram of audio data 1100 recorded on recording medium 100 according to the second embodiment.
  • the recording medium 100 records audio data 1100 encoded by the MPEG standard AAC + SBR (Spectral Band Replication).
  • the AAC + SBR method is a method that is standardized by the international standard MPEG (ISOZlEC14496-3).
  • the AAC + SBR method expands the audio data playback band of the conventional AAC method (ISOZIEC13818-7). This is a method in which important auxiliary information is recorded together with AAC encoding data.
  • the shaded portion in FIG. 7 is the conventional audio data of the AAC unit, and the hatched portion is auxiliary information for expanding the reproduction band, that is, the audio data of the SBR unit.
  • the playback device 101 has a function of extracting and reproducing only the AAC section from the AAC + SBR audio data, and a function of extracting and reproducing the AAC section and the SBR section.
  • FIG. 12 is a flowchart showing a playback operation procedure of the audio player 14 according to the second embodiment.
  • the recording medium 100 stores AAC + SBR audio data as a sound source.
  • the recording medium 100 may be a semiconductor memory card, for example, and the audio data may be digitally compression-encoded signals, which is suitable for miniaturization of equipment and low cost. Good,.
  • the reproducing device 101 reads out and reproduces the audio data recorded on the recording medium 100 (S1201). For example, an address for sequentially reading audio data is sent from the playback device 101 to the recording medium 100, and the playback device 101 receives the audio data read based on the address and plays the audio data.
  • the playback device 101 Decode the encoded signal.
  • the reproducing apparatus 101 since the audio data is audio data of the AAC + SBR system, the reproducing apparatus 101 extracts only the AAC section and decodes the AAC data, or performs the decoding on both the AAC section and the SBR section. You have the option to extract and decrypt the AAC + SBR data. Which one to select is determined as described later according to the state of the detection device 106.
  • the drive power supply module 102 includes a solar cell 103 and supplies power to the recording medium 100 and the playback device 101.
  • the power supply amount is sequentially detected by the detection device 106. I have.
  • the reproducing device 101 decodes the AAC + SBR data (S1204), and the value detected by the detecting device 106 is when small (Y in S1203), the reproduction apparatus 101, the power required to decode to (S1205) o AAC + SBR data to decode only AAC section, only the AAC portion to decrypt Since the required power is larger than the required power, the control is performed so that only the AAC part is decoded when the power supply of the solar cell power decreases.
  • audio player when the power supply from driving power supply module 102 is sufficient, audio player according to the second embodiment decodes AAC + SBR data to listen to wideband reproduced sound. Conversely, if the power supply from the drive power supply module 102 is insufficient, only the AAC section is decoded to produce a narrow-band reproduced sound. .
  • the reproduction is performed with stereophonic processing. If the power supply from the driving power supply module 102 is insufficient, Even if the reproduction is performed without processing the sound, it is possible to prevent the sound from being cut off due to the power shortage.
  • the bass reproduction is emphasized, and when the power supply from the driving power supply module 102 is insufficient, the reproduction without emphasizing the bass sound is performed. In addition, it is possible to prevent sound cutoff due to power shortage.
  • the audio player 14 includes the detection device 106 that detects the power level, and reproduces the reproduction quality according to the detection value when the supply of sunlight is insufficient. Can be controlled, and sound breaks during reproduction can be effectively prevented.
  • the acoustic device embodying the present invention can be applied to a portable audio player or the like that uses a solar cell as a driving power source, and particularly to a portable device that requires miniaturization.

Landscapes

  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
  • Power Sources (AREA)
  • Headphones And Earphones (AREA)
  • Photovoltaic Devices (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

There is provided an audio player using a solar battery as a drive power source and performing reproduction not giving inconvenience to a user when the solar light supply is stopped or resumed. The audio player (10) includes a recording medium (100) containing audio data, a reproduction device (101) for reproducing audio data recorded on the recording medium (100), a drive power source module (102) for supplying power to the reproduction device (101) reading the recording medium (100), a solar battery (103) for converting the solar light into electric power, and a memory (4) for storing reproduction position information indicating the reproduction position of the audio data reproduced by the reproduction device (101).

Description

明 細 書  Specification
音響装置  Sound equipment
技術分野  Technical field
[0001] 本発明は、駆動電源として太陽電池を備えた音響装置に関し、特に、持ち運びが 容易な携帯型オーディオプレーヤ等の音響装置に関する。  The present invention relates to an audio device provided with a solar cell as a driving power source, and more particularly to an audio device such as a portable audio player which is easy to carry.
背景技術  Background art
[0002] 従来、携帯型オーディオプレーヤの駆動電源は、小型の乾電池か充電池が用いら れているが、近年においては、機器の省電力化技術が向上し、例えば、単 4乾電池 1 本で数十時間の連続再生が可能なオーディオプレーヤが商品化されている。  [0002] Conventionally, a small-sized dry battery or a rechargeable battery has been used as a drive power source for a portable audio player. However, in recent years, the power saving technology of devices has been improved, and for example, a single AAA battery can be used. An audio player capable of continuous reproduction for several tens of hours has been commercialized.
[0003] また、近年においては太陽光発電の技術も向上し、直射日光を照射することにより 、太陽電池を用いて再生を行うことが可能な携帯型オーディオプレーヤが実現しつ つあるが、例えば、音声を再生する装置の駆動電源としてこれを用いるような特許出 願がなされている (例えば、特許文献 1、特許文献 2参照)。  [0003] In recent years, the technology of photovoltaic power generation has also been improved, and portable audio players that can perform reproduction using solar cells by irradiating direct sunlight are being realized. Patent applications have been filed for using this as a drive power supply for a device that reproduces audio (for example, see Patent Documents 1 and 2).
[0004] 上記特許文献 1においては、太陽電池と、当該太陽電池によって充電される充電 式バッテリーとを駆動電源として音声を出力するソーラーバッテリー式音声ガイド装置 が開示されている。  [0004] Patent Document 1 discloses a solar battery type voice guide device that outputs sound using a solar cell and a rechargeable battery charged by the solar cell as a driving power source.
[0005] また、上記特許文献 2にお 、ては、オーディオプレーヤを帽子と一体ィ匕し、太陽電 池を当該帽子のつばの部分に組み込み、当該太陽電池を駆動電源として用いる帽 子一体型音響装置が開示されている。  [0005] Further, in Patent Document 2, an audio player is integrated with a hat, a solar battery is incorporated in a brim portion of the hat, and a hat-integrated type using the solar cell as a driving power source is provided. An acoustic device is disclosed.
特許文献 1：特開 2002— 51480号公報  Patent Document 1: JP-A-2002-51480
特許文献 2 :特開 2002-291084号公報  Patent Document 2: JP 2002-291084 A
発明の開示  Disclosure of the invention
発明が解決しょうとする課題  Problems to be solved by the invention
[0006] しかしながら、上記特許文献 1の構成では、電力供給が途絶えた後、機器の動作を 再開した場合、電力供給が途絶えた時の再生状態が失われてしまうので、電力供給 が途絶えた時の状態力も再生を再開することができない。即ち、ひとたび電力供給が 不足すると、それが復帰した場合でも、今まで聴いていた楽曲の続き力 聴くことが できない。特に、太陽電池を駆動電源として用いている場合には、電力供給状態が 乾電池や充電池などに比べて不安定であるので、上記によってユーザが再生使用 時に被る不便は甚だしい。 [0006] However, in the configuration of Patent Document 1, when the operation of the device is restarted after the power supply is cut off, the reproduction state at the time of the power supply cut off is lost, and thus the power supply is cut off. Can not resume regeneration. In other words, once the power supply is insufficient, even if the power is restored, Can not. In particular, when a solar cell is used as a driving power source, the power supply state is more unstable than that of a dry cell or a rechargeable battery.
[0007] また、上記特許文献 2のような構成では、音響装置の外観の柔軟性がな 、ので、太 陽光の供給を効率的に受けるためには、帽子のつばを太陽の方向に向けなくてはな らないという課題がある。即ち、一定の太陽光を受けるためには帽子のつばの方向を 常に意識する必要があり、例えば、朝、東向きに歩いているときは良いが、夕方、東 向きに歩いているときは、帽子を逆向きにかぶる等、ユーザの当該音響装置の使用 時における利便性の面での問題がある。  [0007] Further, with the configuration as in Patent Document 2, since the appearance of the acoustic device is not flexible, in order to efficiently receive the supply of sunlight, the hat brim must not be directed toward the sun. There is a problem that must not be. In other words, in order to receive a certain amount of sunlight, it is necessary to always be aware of the direction of the brim of the hat.For example, it is good when walking eastward in the morning, but when walking eastward in the evening, There is a problem in terms of convenience when the user uses the audio device, such as wearing a hat in the opposite direction.
[0008] 本発明は、このような従来の問題点に鑑みてなされたものであって、駆動電源とし て太陽電池を用い、いったん電力の供給が不足して再生が停止した場合でも、再度 電力の供給が復活した際に、電力の供給が不足した再生時点から再生できる音響 装置を提供することを第一の目的とする。  [0008] The present invention has been made in view of such a conventional problem, and uses a solar cell as a driving power source. Even when the power supply is insufficient and the reproduction is stopped, the power is again supplied. It is a first object of the present invention to provide an audio device that can be reproduced from a point in time when power supply is insufficient when power supply is restored.
[0009] また、太陽光の受光が少なくなる等により電力の供給が不足し力かった場合におい て、再生品質を制御して、できるだけ音切れを防止することができる音響装置を提供 することを第二の目的とする。  [0009] It is also an object of the present invention to provide an audio device capable of controlling reproduction quality and preventing sound interruption as much as possible when power supply is insufficient due to a decrease in sunlight reception or the like and power is insufficient. The second purpose.
[0010] さらに、駆動電源として太陽電池を用いながらも外観の柔軟性をもった音響装置を 提供することを第三の目的とする。  [0010] It is a third object of the present invention to provide an acoustic device having flexibility in appearance while using a solar cell as a drive power supply.
課題を解決するための手段  Means for solving the problem
[0011] 上記の課題を解決するため、本発明に係る音響装置は、駆動電源モジュールとし て太陽電池を備えた音響装置であって、音声データが記録された記録媒体と、前記 記録媒体に記録された音声データを再生する再生手段と、前記再生手段が再生し て 、る音声データの再生位置を示す再生位置情報を格納するメモリと、前記メモリに 前記再生位置情報を格納するタイミングを決定して、前記再生位置情報を前記メモリ に記録する記録手段とを備え、前記再生手段は、前記太陽電池からの電力供給が 不足したときは再生を停止し、前記太陽電池力 の電力供給が復帰した場合には前 記メモリに記録されて 、る前記再生位置情報に基づ 、て再生を再開することを特徴 とする。 [0012] この構成により、再生手段は電力供給が不足したときは再生を停止し、電力供給が 復帰した場合、再生手段はメモリに格納されて ヽる再生位置情報を読み込むことによ り、再生が停止した時点からの再生を再開することができる。 [0011] In order to solve the above problems, an audio device according to the present invention is an audio device provided with a solar cell as a drive power supply module, and includes a recording medium on which audio data is recorded, and a recording medium on the recording medium. A reproduction unit for reproducing the reproduced audio data, a memory for storing reproduction position information indicating a reproduction position of the reproduced audio data, and a timing for storing the reproduction position information in the memory. Recording means for recording the reproduction position information in the memory, wherein the reproduction means stops reproduction when the power supply from the solar cell is insufficient, and the power supply of the solar cell power is restored. In this case, the reproduction is resumed based on the reproduction position information recorded in the memory. [0012] With this configuration, when the power supply is insufficient, the reproducing unit stops the reproduction, and when the power supply is restored, the reproducing unit reads the reproduction position information stored in the memory to perform the reproduction. Can be resumed from the point at which playback stopped.
[0013] また、本発明に係る音響装置の前記駆動電源モジュールは、充電池又は乾電池を さらに備え、前記メモリは、少なくとも前記充電池又は前記乾電池からの電力供給を 受けることを特徴とする。 [0013] Further, the drive power supply module of the audio device according to the present invention further includes a rechargeable battery or a dry battery, and the memory receives power supply from at least the rechargeable battery or the dry battery.
[0014] この構成により、記録手段によりメモリに記録される再生位置情報が充電池又は乾 電池によって保持される。 [0014] With this configuration, the reproduction position information recorded in the memory by the recording unit is held by the rechargeable battery or the dry battery.
[0015] また、本発明に係る音響装置は、さらに、前記駆動電源モジュールによって供給さ れる電圧レベル、電流レベル、及び電力レベルの少なくとも 1つを検出する検出手段 を備え、前記記録手段は、前記検出手段によって検出された値が所定値を下回った 場合において、前記メモリに前記再生位置情報を記録することを特徴とする。 [0015] Further, the audio device according to the present invention further includes a detecting unit that detects at least one of a voltage level, a current level, and a power level supplied by the driving power supply module, and the recording unit includes: When the value detected by the detection means falls below a predetermined value, the reproduction position information is recorded in the memory.
[0016] この構成により、記録手段は、検出手段において電力供給が不足したと検出された 場合のみ、メモリに再生位置情報を格納すれば良 、。 With this configuration, the recording unit may store the reproduction position information in the memory only when the detection unit detects that the power supply is insufficient.
[0017] また、本発明に係る音響装置が備える記録手段は、前記充電池又は前記乾電池 力 の電力供給が不足する前に、前記メモリに、前記再生位置情報を記録することを 特徴とする。 [0017] Further, the recording device provided in the audio device according to the present invention is characterized in that the reproduction position information is recorded in the memory before the power supply of the rechargeable battery or the dry battery power is insufficient.
[0018] この構成により、充電池又は乾電池からの電力供給がある間に、メモリに再生位置 情報が記録される。  [0018] With this configuration, the playback position information is recorded in the memory while power is supplied from the rechargeable battery or the dry battery.
[0019] また、本発明に係る音響装置が備える再生手段は、少なくとも、前記検出手段にお ける検出値が所定値以上の場合には第一再生モードを用いて再生を行い、前記検 出手段における検出値が前記所定値未満の場合には前記第一再生モードよりも再 生時の消費電力が少ない第二再生モードで再生を行うことを特徴とする。  [0019] Further, the reproducing means included in the audio device according to the present invention performs reproduction using the first reproduction mode at least when the detection value of the detection means is equal to or more than a predetermined value, and If the detected value is less than the predetermined value, the reproduction is performed in the second reproduction mode which consumes less power during reproduction than in the first reproduction mode.
[0020] この構成により、再生手段は、通常再生モードである第一再生モードと省電力再生 である第二再生モードの 2モードにおいて再生を行うことができ、電力供給が不足の 場合でも、音切れをできるだけ防止することが可能となる。  [0020] With this configuration, the reproducing unit can perform reproduction in two modes, that is, the first reproduction mode, which is a normal reproduction mode, and the second reproduction mode, which is power-saving reproduction. Cutting can be prevented as much as possible.
[0021] また、本発明に係る音響装置の前記第一再生モードは、再生帯域拡大技術を用い た再生であり、前記第二再生モードは、再生帯域拡大技術を用いない再生であるこ とを特徴とする。さらに、前記再生帯域拡大技術を用いた再生は、 MPEG規格 AAC[0021] Further, the first reproduction mode of the audio device according to the present invention is reproduction using a reproduction band expansion technique, and the second reproduction mode is reproduction without using a reproduction band expansion technique. And features. Further, the reproduction using the reproduction band expansion technology is performed according to the MPEG standard AAC.
+ SBR方式の再生であり、前記再生帯域拡大技術を用いない再生は、 MPEG規格+ SBR playback and playback without using the playback bandwidth expansion technology
AAC方式の再生であることを特徴とする。 It is characterized by AAC playback.
[0022] これらの構成により、電力供給が不足の場合、高域の再生をしない再生帯域拡大 技術を用いて再生することで音切れをできるだけ防止することができ、また、電力供 給が不足する場合においては、 AAC + SBR方式でなく AAC方式の再生にすること で音切れをできるだけ防止することができる。 [0022] With these configurations, when power supply is insufficient, sound cutoff can be prevented as much as possible by performing reproduction using a reproduction band expansion technique that does not reproduce high frequencies, and power supply becomes insufficient. In such a case, by using AAC playback instead of AAC + SBR playback, sound interruption can be prevented as much as possible.
[0023] また、本発明に係る音響装置の前記第一再生モードは、低周波数成分を再生する 再生であり、前記第二再生モードは、低周波数成分を再生しない再生であることを特 徴とする。 [0023] Further, the audio device according to the present invention is characterized in that the first reproduction mode is reproduction for reproducing low frequency components, and the second reproduction mode is reproduction for not reproducing low frequency components. I do.
[0024] この構成により、電力供給が不足の場合において、低周波成分を再生しないことで [0024] With this configuration, when the power supply is insufficient, the low-frequency component is not reproduced.
、再生時に音切れをできるだけ防止することができる。 In addition, it is possible to prevent interruption of sound during reproduction as much as possible.
[0025] また、本発明に係る音響装置の前記第一再生モードは、立体音響処理を伴った再 生であり、前記第二再生モードは、立体音響処理を伴わない再生であることを特徴と する。 [0025] Further, the first playback mode of the audio device according to the present invention is playback with stereophonic processing, and the second playback mode is playback without stereophonic processing. I do.
[0026] この構成により、電力供給が不足の場合において、立体音響処理を伴った再生を しな 、ことで、再生時の音切れをできるだけ防止することができる。  [0026] With this configuration, when power supply is insufficient, reproduction accompanied by stereophonic processing is not performed, so that sound interruption during reproduction can be prevented as much as possible.
[0027] また、本発明に係る音響装置が備える充電池又は乾電池は、前記メモリに、前記再 生位置情報を格納するために必要な時間を Tとした時、前記太陽電池からの電力供 給が不足したときに、少なくとも前記 T時間は電力を供給できる容量を有することを特 徴とする。  [0027] Further, the rechargeable battery or the dry battery included in the acoustic device according to the present invention is configured such that when a time required for storing the playback position information in the memory is T, power is supplied from the solar cell. When the shortage occurs, at least the T time has a capacity capable of supplying electric power.
[0028] この構成により、音響装置に使用する充電池又は乾電池の容量を極めて小容量と することが可能となる。  [0028] With this configuration, the capacity of the rechargeable battery or the dry battery used in the audio device can be made extremely small.
[0029] また、本発明に係る音響装置は、さらに、前記太陽電池から供給される電力を充電 する充電手段を備え、前記再生手段は、前記充電手段から電力供給を受けて前記 再生を行うことを特徴とする。  [0029] Further, the acoustic device according to the present invention further includes a charging unit that charges power supplied from the solar cell, and the reproducing unit performs the reproduction by receiving power supply from the charging unit. It is characterized.
[0030] この構成により、再生装置が充電手段力 の電力供給を受けるので、駆動電源モ ジュールとして太陽電池を用いる場合においても、安定した再生が行えることとなる。 [0031] また、本発明に係る音響装置の前記駆動電源モジュールは、平面的に構成され、 前記太陽電池は、前記駆動電源モジュールの表裏両面に貼り付けられることを特徴 とする。さらに、本発明に係る音響装置の前記駆動電源モジュールは、多面体で構 成され、前記太陽電池は、前記多面体の少なくとも 1部の表面に貼り付けられることを 特徴とする。 [0030] With this configuration, since the playback device receives the power supply from the charging means, stable playback can be performed even when a solar battery is used as the drive power supply module. [0031] Further, the drive power supply module of the acoustic device according to the present invention is configured in a planar manner, and the solar cells are attached to both front and back surfaces of the drive power supply module. Further, the drive power supply module of the acoustic device according to the present invention is constituted by a polyhedron, and the solar cell is attached to at least a part of the surface of the polyhedron.
[0032] これらの構成により、平面的又は多面的に構成された電源モジュールの表面に太 陽電池が配置されて 、るので、集光効率が高まることとなる。  [0032] According to these configurations, the solar cells are arranged on the surface of the power supply module configured in a planar or multi-sided manner, so that the light collection efficiency is improved.
[0033] また、本発明に係る音響装置は、さらに、前記再生手段で再生された音声データを 出力するヘッドホンを有し、前記ヘッドホンと前記再生手段とを結ぶケーブルに前記 太陽電池が装着されて ヽることを特徴とする。 [0033] Further, the acoustic device according to the present invention further includes headphones for outputting the audio data reproduced by the reproducing means, and the solar battery is attached to a cable connecting the headphones and the reproducing means. It is characterized by
[0034] この構成により、ヘッドホンのケーブルに取り付けられた太陽電池を移動させること によって、太陽光の供給を受け易くすることができる。 [0034] With this configuration, it is possible to easily receive the sunlight by moving the solar cell attached to the headphone cable.
[0035] また、本発明にかかる音響装置は、さらに、前記再生手段で再生された音声データ を出力するヘッドホンを備え、前記太陽電池と前記ヘッドホンとは一体ィ匕するように接 続されて!ヽることを特徴とする。 Further, the audio device according to the present invention further includes headphones for outputting the audio data reproduced by the reproducing means, and the solar cell and the headphones are connected so as to be integrated! It is characterized by
[0036] この構成により、ヘッドホン装着時、太陽電池が耳元或いは頭部に露出するので、 太陽電池は電力供給を受け易くなる。 [0036] With this configuration, when the headphones are worn, the solar cell is exposed at the ear or head, so that the solar cell can easily receive power supply.
[0037] また、本発明に係る音響装置の前記記録媒体及び前記メモリは、不揮発性の半導 体メモリであることを特徴とする。 [0037] Further, the recording medium and the memory of the acoustic device according to the present invention are characterized by being nonvolatile semiconductor memories.
[0038] この構成により、記録媒体に不揮発性の半導体メモリを用いることにより小型化でき る。また、メモリは、不揮発性の半導体メモリを用いることにより電力供給不足が長時 間続いた場合でも、メモリに記録されている再生位置情報が失われず、再生手段は メモリを読み込むことにより、再生停止した再生位置力 の再生を復帰することができ る。 With this configuration, the size can be reduced by using a nonvolatile semiconductor memory as the recording medium. In addition, even if power supply shortage continues for a long time by using a non-volatile semiconductor memory, the reproduction position information recorded in the memory is not lost, and the reproduction means stops reading by reading the memory. It is possible to recover the reproduction of the reproduced reproduction position force.
[0039] また、本発明に係る音響装置は、さらに、前記駆動電源モジュールを所望の位置に 固定するための止め具を備えることを特徴とする。  [0039] The acoustic device according to the present invention is further characterized by further comprising a stopper for fixing the driving power supply module at a desired position.
[0040] この構成により、止め具により太陽電池を所望の位置に固定でき、さらに太陽電池 に対しての集光効率を高くすることが可能となる。 [0041] 尚、前記目的を達成するために、本発明は、音響装置の特徴的な手段をステップと する再生方法として実現したり、コンピュータに各ステップを実行させるためのプログ ラムとして実現することもできる。そのようなプログラムは、 CD— ROM等の記録媒体 やインターネット等の伝送媒体を通じて配信することができるのは言うまでもない。 発明の効果 [0040] According to this configuration, the solar cell can be fixed at a desired position by the stopper, and the light collection efficiency for the solar cell can be increased. [0041] In order to achieve the above object, the present invention may be realized as a reproduction method using the characteristic means of the audio device as steps, or as a program for causing a computer to execute each step. You can also. Needless to say, such a program can be distributed through a recording medium such as a CD-ROM or a transmission medium such as the Internet. The invention's effect
[0042] 本発明に係る音響装置は、太陽電池を用いながらも、電力供給が不足した時にお いても、  [0042] The acoustic device according to the present invention uses a solar cell, even when power supply is insufficient.
停止した再生位置からの再生を開始したり、再生モードを変更することで再生状態を 確保することが可能となる。  By starting playback from the stopped playback position or changing the playback mode, the playback state can be ensured.
[0043] また、太陽電池を様々な形状や形態として、携帯型オーディオプレーヤ等の音響 装置においても集光効率を向上させて電力供給を行うことが可能となる。 [0043] In addition, it is possible to supply electric power by improving the light-collecting efficiency in an acoustic device such as a portable audio player by using various shapes and forms of solar cells.
図面の簡単な説明  Brief Description of Drawings
[0044] [図 1]図 1は実施の形態 1に係るオーディオプレーヤの外観図。 FIG. 1 is an external view of an audio player according to Embodiment 1.
[図 2]図 2は実施の形態 1におけるオーディオプレーヤの構成を示す図。  FIG. 2 is a diagram showing a configuration of an audio player according to the first embodiment.
[図 3]図 3は実施の形態 1に係るオーディオプレーヤの再生時における動作手順を示 すフローチャート。  FIG. 3 is a flowchart showing an operation procedure at the time of reproduction of the audio player according to the first embodiment.
[図 4]図 4はオーディオプレーヤが太陽電池からの電力を充電するための充電池を備 えている場合の機能ブロック図。  [FIG. 4] FIG. 4 is a functional block diagram when the audio player has a rechargeable battery for charging power from a solar cell.
[図 5]図 5は実施の形態 1に係るオーディオプレーヤの機能構成図。  FIG. 5 is a functional configuration diagram of the audio player according to the first embodiment.
[図 6]図 6は実施の形態 1に係るオーディオプレーヤの構成の変形例。  FIG. 6 is a modified example of the configuration of the audio player according to the first embodiment.
[図 7]図 7はケーブルに止め具を備えたオーディオプレーヤの参考図。  [FIG. 7] FIG. 7 is a reference diagram of an audio player having a cable with a stopper.
[図 8]図 8 (a)は円筒形の多面体の胴の部分に太陽電池が張り付けられている参考 図。図 8 (b)は立方体の表面に太陽電池が張り付けられている参考図。  [FIG. 8] FIG. 8 (a) is a reference drawing in which a solar cell is attached to a cylindrical polyhedral body. Fig. 8 (b) is a reference drawing in which a solar cell is attached to the surface of a cube.
[図 9]図 9 (a)は太陽電池の表面に取り外し可能に装着される集光レンズの説明図。 図 9 (b)は実施の形態 1に係るオーディオプレーヤ専用置き台の外観図。  [FIG. 9] FIG. 9 (a) is an explanatory view of a condenser lens detachably mounted on the surface of a solar cell. FIG. 9B is an external view of an audio player dedicated stand according to the first embodiment.
[図 10]図 10は実施の形態 2におけるオーディオプレーヤの機能構成を示す図。  FIG. 10 is a diagram showing a functional configuration of an audio player according to a second embodiment.
[図 11]図 11は実施の形態 2の記録媒体に記録される音声データのデータ構成図。  FIG. 11 is a data configuration diagram of audio data recorded on a recording medium according to a second embodiment.
[図 12]図 12は実施の形態 2に係るオーディオプレーヤの再生動作手順を示すフロー チャート。 FIG. 12 is a flowchart showing a reproducing operation procedure of the audio player according to the second embodiment. chart.
符号の説明  Explanation of symbols
10— 14 オーディオブ  10— 14 audio
100 記録媒体  100 recording media
101 再生装置  101 playback device
102 駆動電源モジュール  102 Drive power supply module
Λ  Λ
103 太陽電池  103 solar cell
104 メモリ  104 memory
105 充電池  105 rechargeable battery
106 検出装置  106 Detector
107 ヘッドホン  107 headphones
601 ケーブル  601 cable
701 止め具  701 Stopper
702, 703 太陽電池  702, 703 solar cell
901 集光レンズ  901 Condenser lens
903 オーディオプレー -ャ専用置き台  903 Audio Player-Stand for exclusive use of player
発明を実施するための最良の形態  BEST MODE FOR CARRYING OUT THE INVENTION
[0046] 以下、本発明の実施の形態におけるオーディオプレーヤについて図面を参照しな がら説明する。  Hereinafter, an audio player according to an embodiment of the present invention will be described with reference to the drawings.
(実施の形態 1)  (Embodiment 1)
図 1は、本実施の形態 1に係るオーディオプレーヤ 10の外観図を示す。  FIG. 1 shows an external view of an audio player 10 according to the first embodiment.
[0047] オーディオプレーヤ 10は、駆動電源として太陽電池を備えており、太陽電池からの 電力供給により音楽等の再生処理を行う装置である。 [0047] The audio player 10 is a device that includes a solar cell as a driving power supply and performs a reproduction process of music or the like by supplying power from the solar cell.
[0048] 図 2は、本実施の形態 1におけるオーディオプレーヤ 10の機能構成を示す図であ る。 FIG. 2 is a diagram showing a functional configuration of the audio player 10 according to the first embodiment.
オーディオプレーヤ 10は、駆動電源として太陽電池を用いて音楽等を再生する音 響装置であって、音声データが記録されている記録媒体 100、記録媒体 100に記録 された音声データを再生する再生装置 101、再生装置 101に電力を供給する駆動 電源モジュール 102、太陽光等を電力に変換する太陽電池 103、再生装置 101が 再生して!/ヽる音声データの再生位置を示す再生位置情報を格納するメモリ 104を備 える。 The audio player 10 is a sound device that reproduces music or the like using a solar cell as a driving power supply, and includes a recording medium 100 on which audio data is recorded, and a reproduction device that reproduces audio data recorded on the recording medium 100. 101, drive to supply power to playback device 101 A power supply module 102, a solar cell 103 for converting sunlight or the like into electric power, and a memory 104 for storing reproduction position information indicating a reproduction position of audio data reproduced / reproduced by the reproducing device 101 are provided.
[0049] 以上のように構成されたオーディオプレーヤ 10の動作について以下説明する。図 3 は、本実施の形態 1に係るオーディオプレーヤ 10の再生時における動作手順を示す フローチャートである。尚、記録媒体 100には、音源としての音声データが格納され ている。記録媒体 100は、例えば半導体メモリカードであり、音声データはデジタル 的に圧縮符号化された信号であることが、機器の小型化、低コストィ匕のために好まし い。また、記録媒体 100はハードディスクや光ディスク等のディスク媒体でもよぐ音 声信号は非圧縮の PCM信号でもよ 、。  [0049] The operation of the audio player 10 configured as described above will be described below. FIG. 3 is a flowchart showing an operation procedure at the time of reproduction of the audio player 10 according to the first embodiment. The recording medium 100 stores audio data as a sound source. The recording medium 100 is, for example, a semiconductor memory card, and it is preferable that the audio data is a digitally compressed and encoded signal in order to reduce the size and cost of the device. The recording medium 100 may be a disk medium such as a hard disk or an optical disk, and the audio signal may be an uncompressed PCM signal.
[0050] まず、再生装置 101は、記録媒体 100に記録された音声データを読み出し、再生 する（S301)。例えば、再生装置 101から記録媒体 100に対し、音声データを逐次 読み出すためのアドレスを送出し、該アドレスに基づいて読み出された音声データを 再生装置 101が受け取り音声データを再生する。  First, the playback device 101 reads out and plays back audio data recorded on the recording medium 100 (S301). For example, an address for sequentially reading audio data is transmitted from the reproducing device 101 to the recording medium 100, and the reproducing device 101 receives the audio data read based on the address and reproduces the audio data.
[0051] ここで、音声データが圧縮符号化された信号の場合は、再生装置 101は、圧縮符 号化された信号を復号化する。例えば、 AAC (Advanced Audio Coding)方式で圧縮 符号化された信号であれば、 AACの復号ィ匕手順 (ISO 13818—7)に従って復号ィ匕 する。勿論、必ずしも AACである必要はなぐ MP3等の方式でもよいし、非圧縮の P CM信号でもよい。  Here, when the audio data is a signal that has been compression-encoded, the reproducing device 101 decodes the signal that has been compression-encoded. For example, if the signal is compression-encoded by the AAC (Advanced Audio Coding) method, it is decoded according to the AAC decoding procedure (ISO 13818-7). Of course, it is not always necessary to use AAC, but a method such as MP3 or an uncompressed PCM signal may be used.
[0052] さらに、再生装置 101は、再生している音声データの再生位置を示す再生位置情 報を、逐次、メモリ 104に記録する（S302)。ここで再生位置情報は、例えば、再生装 置 101が、記録媒体 100から音声データを読み出しているアドレス、或いは、当該ァ ドレスと関連付けられている符号 (タグ情報など)でよい。或いは、現在再生しているコ ンテンッの（音楽データの場合は曲の)識別記号でもよ!/、。  Further, the reproducing device 101 sequentially records the reproduction position information indicating the reproduction position of the audio data being reproduced in the memory 104 (S302). Here, the playback position information may be, for example, an address at which the playback device 101 reads out audio data from the recording medium 100, or a code (eg, tag information) associated with the address. Alternatively, it may be the identification code of the content currently being played (or the song in the case of music data)! /.
[0053] 一方、駆動電源モジュール 102は、太陽電池 103を有しており、記録媒体 100、再 生装置 101、メモリ 103に電力を供給する。  On the other hand, the drive power supply module 102 has a solar cell 103 and supplies power to the recording medium 100, the playback device 101, and the memory 103.
[0054] ここで、駆動電源は、太陽電池であるので、その電力供給量は、必ずしも常に安定 しているわけではなぐ光量によって変動するので、突然オーディオプレーヤの動作 が停止してしまう恐れがある。逆に、非常に短時間に電力供給量が復帰する可能性 もめる。 Here, since the driving power supply is a solar cell, the power supply amount fluctuates depending on the amount of light which is not always stable. May stop. Conversely, the possibility of power supply returning in a very short time is also increased.
[0055] そして、電力不足で再生が停止して (S303で Y)、そのご電力供給が復帰した場合 には（S 304で Y)、その場合、先ほどまで聴いていた音声データの続きを (或いは先 ほどまで聴いていた音声データの先頭から)再生するために、再生装置 101は、メモ リ 104に記録されている再生位置情報を取得し (S305)、当該再生位置情報に基づ いて、音声データの再生を続行する（S306)。この場合、勿論、メモリ 104は、例えば フラッシュメモリ等の電力供給が停止してもデータを保持し続けられる不揮発性のメ モリであることが望ましいが、下記の図 4に示すような構成でもよい。尚、電力不足が 生じない場合 (S303で N)には、 S302の再生位置情報をメモリに逐次記録する処理 を行い、電力不足が生じても電力供給が復帰しない場合においては（S304で N)、 再生は再開しないために処理を終了する。  [0055] Then, when the reproduction is stopped due to the power shortage (Y in S303) and the power supply is restored (Y in S304), in this case, the continuation of the audio data that has been listened to earlier ( In order to reproduce the audio data (or from the beginning of the audio data that has been listened to earlier), the reproducing apparatus 101 acquires the reproduction position information recorded in the memory 104 (S305), and based on the reproduction position information, The reproduction of the audio data is continued (S306). In this case, needless to say, the memory 104 is preferably a non-volatile memory that can retain data even when the power supply of a flash memory or the like is stopped, but may have a configuration as shown in FIG. 4 below. . If the power shortage does not occur (N in S303), the process of sequentially recording the reproduction position information in S302 in the memory is performed. If the power supply does not return even if the power shortage occurs (N in S304). Since the reproduction does not resume, the process is terminated.
[0056] 図 4は、オーディオプレーヤ 11が太陽電池 103からの電力を充電するための充電 池 105を備えている場合の機能ブロック図である。  FIG. 4 is a functional block diagram in the case where the audio player 11 includes a battery 105 for charging power from the solar cell 103.
[0057] 即ち、図 4における駆動電源モジュール 102が、充電池 105も内蔵しており、太陽 電池 103からの発電量が不足した場合は、充電池 105によって、メモリ 104の再生位 置情報を保持することができる。勿論、充電池 105から供給される電力は、記録媒体 100、再生装置 101に供給され、太陽電池 103からの発電量が不足した場合でも再 生を続行するように構成してもよい。また、充電池 105は、乾電池などでもよいことは 言うまでもない。  That is, the driving power supply module 102 in FIG. 4 also includes a built-in rechargeable battery 105, and when the amount of power generated from the solar cell 103 is insufficient, the rechargeable battery 105 holds the reproduction position information in the memory 104. can do. Of course, the electric power supplied from the rechargeable battery 105 may be supplied to the recording medium 100 and the reproducing device 101, and the reproduction may be continued even when the amount of power generated from the solar cell 103 is insufficient. Needless to say, the rechargeable battery 105 may be a dry battery or the like.
[0058] また、本実施の形態では、メモリ 104に常に再生位置情報を格納する処理を行って いたが、図 5に示すオーディオプレーヤ 12のように、駆動電源モジュール 102によつ て供給される電圧レベル、電流レベル、或いは電力レベルを検出する検出装置 106 を備え、検出装置 106によって検出された電力値が所定の電力値を下回った場合に おいてのみ、メモリ 104に再生位置情報を格納するようにしてもよい。この構成により 、図 2に示すオーディオプレーヤ 10のように、電力供給状態に関係なく再生位置情 報を常にメモリ 104に書き込む処理を行う必要がなくなる。  Further, in the present embodiment, the processing for always storing the reproduction position information in the memory 104 is performed, but the processing is supplied by the drive power supply module 102 as in the audio player 12 shown in FIG. A detecting device 106 for detecting a voltage level, a current level, or a power level is provided, and the reproduction position information is stored in the memory 104 only when the power value detected by the detecting device 106 falls below a predetermined power value. You may do so. With this configuration, unlike the audio player 10 shown in FIG. 2, it is not necessary to always perform the process of writing the reproduction position information to the memory 104 regardless of the power supply state.
[0059] また、この構成の場合は、充電池 105の容量は、最低限、メモリ 104に再生位置情 報を書き込む時間だけ電力を供給できる能力があればよいため、極めて安価で小容 量の充電池で良!、こととなる。 In this configuration, at least the capacity of the rechargeable battery 105 is stored in the memory 104 as the playback position information. It is only necessary to have the ability to supply power for the time to write the information, so an extremely inexpensive and small-capacity rechargeable battery is sufficient!
[0060] また、上記説明したようなオーディオプレーヤは、ヘッドホンと組み合わせて携帯機 器として用いられる場合があり、図 6は、本実施の形態 1に係るオーディオプレーヤ 1 3の構成の変形例を示して ヽる。  The audio player as described above may be used as a portable device in combination with headphones, and FIG. 6 shows a modification of the configuration of the audio player 13 according to the first embodiment. Tepuru.
[0061] 図 6に示すように、太陽光を効率的に受光するには、ヘッドホン 107と再生装置 10 1とを結ぶケーブル 601に駆動電源モジュール 102及び太陽電池 103を装着するこ とが望ましい。ケーブル 601は、ヘッドホン装着時でも位置の変更が容易であるので 、駆動電源モジュール 102を太陽光を受けやすい方向に適宜移動でき、効率的に 太陽光による電力の供給を受けることが可能となる。  As shown in FIG. 6, in order to efficiently receive sunlight, it is desirable to attach drive power supply module 102 and solar cell 103 to cable 601 connecting headphone 107 and playback device 101. Since the position of the cable 601 can be easily changed even when headphones are mounted, the drive power supply module 102 can be appropriately moved in a direction that easily receives sunlight, and power can be efficiently supplied by sunlight.
[0062] 図 7は、ケーブル 601に止め具 701を備えたオーディオプレーヤの参考図を示して いる。このように、太陽光を受けやすい方向に駆動電源モジュール 102を固定するた めの止め具 701を備えるため、例えばネクタイピンによってネクタイの位置を固定する ように止め具 701によって駆動電源モジュール 102を固定してもよ!/、。この構成により 、太陽電池 601に対してより効率的に太陽光の集光を行うことが可能となる。  FIG. 7 shows a reference diagram of an audio player having a cable 601 and a stopper 701. As described above, since the stopper 701 for fixing the driving power supply module 102 in a direction that is easy to receive sunlight is provided, the driving power supply module 102 is fixed by the stopper 701 so that the position of the tie is fixed by, for example, a tie pin. You can! / With this configuration, it is possible to more efficiently condense sunlight to solar cell 601.
[0063] さらに、駆動電源モジュール 102を、平面的に構成し、表裏両面に太陽パネルを配 置することによって、集光の効率を上げてもよい。図 8は、本実施の形態に係るォー ディオプレーャに備えられる太陽電池の様々な形状を説明するための参考図である  [0063] Furthermore, the drive power supply module 102 may be configured in a plane, and the solar panels may be arranged on both front and back surfaces to increase the light collection efficiency. FIG. 8 is a reference diagram for explaining various shapes of solar cells provided in the audio player according to the present embodiment.
[0064] 本図において、駆動電源モジュールを多面体で構成し、その少なくとも一部の表面 に太陽パネルを配置することによって、集光の効率を上げてもよい。図 8 (a)は、円筒 形の多面体の胴の部分に太陽電池 702が張り付けられて 、る参考図を示して 、る。 図 8 (b)は、立方体の表面に太陽電池 703が張り付けられて 、る参考図を示して 、る 。勿論、これ以外にも太陽電池の形状をダイヤモンド形の立体にするなど、集光効率 と外観のよさを併せ持つ形状にすることも可能であることは言うまでもない。 [0064] In this figure, the drive power supply module may be made up of a polyhedron, and a solar panel may be arranged on at least a part of the surface thereof to increase the light collection efficiency. FIG. 8 (a) shows a reference diagram in which a solar cell 702 is attached to a cylindrical polyhedral body. FIG. 8B shows a reference diagram in which a solar cell 703 is attached to the surface of a cube. Of course, it goes without saying that it is also possible to adopt a shape having both light-collecting efficiency and good external appearance, such as making the shape of the solar cell a diamond-shaped solid.
[0065] 図 9は、太陽電池への集光効率を向上させるための集光レンズを備える駆動電源 モジュールの参考図である。  FIG. 9 is a reference diagram of a drive power supply module including a condenser lens for improving the condenser efficiency to a solar cell.
[0066] 図 9 (a)は、太陽電池 103の表面に取り外し可能に装着される集光レンズ 901の説 明図である。集光レンズ 901は、太陽電池 103に固定具 902を用いて固定され、光 を太陽パネルに集光する位置に取り付けられる。即ち、オーディオプレーヤを使用し て 、るときや使用して 、な 、ときにぉ 、て、集光レンズ 901を用いることにより太陽光 を効率的に太陽電池に集光して充電効率を向上させることができる。 FIG. 9 (a) shows the theory of the condenser lens 901 which is detachably mounted on the surface of the solar cell 103. FIG. The condenser lens 901 is fixed to the solar cell 103 using a fixture 902, and is attached to a position where light is focused on the solar panel. That is, by using the condensing lens 901 with the use of the audio player, the light is efficiently condensed on the solar cell by using the condenser lens 901 to improve the charging efficiency. be able to.
[0067] また、図 9 (b)は、本実施の形態 1に係るオーディオプレーヤの専用置き台の外観 図を示している。専用置き台 903には、太陽光の集光効率を向上させるための集光 レンズ 903aが備えられており、不使用時においてオーディオプレーヤを収納凹部 90 3bに載置しておくことにより、効率的に太陽電池に充電することが可能となる。  FIG. 9 (b) shows an external view of a dedicated table of the audio player according to the first embodiment. The dedicated holder 903 is equipped with a condenser lens 903a for improving the efficiency of condensing sunlight, and by placing the audio player in the storage recess 903b when not in use, it is more efficient. It is possible to charge the solar cell in a short time.
[0068] 以上の説明のように、本実施の形態に係るオーディオプレーヤは、音声信号の再 生位置情報を記録するメモリ 104を設けることによって、電力供給が一旦不足した後 に復帰した際は、当該再生位置情報に基づいて再生を再開させることで、リスナーは 電力供給が途切れた後復帰した際、音声データの続き力 聴くことができることがで き、できるだけリスナーに不便を与えないこととできる。  As described above, the audio player according to the present embodiment is provided with memory 104 for recording the playback position information of the audio signal. By restarting the reproduction based on the reproduction position information, the listener can listen to the continuation of the audio data when the power is restored after the interruption of the power supply, and the listener can be inconvenienced as little as possible.
[0069] また、本実施の形態に係るオーディオプレーヤは、電力レベルを検出して、所定の 電力レベルを下回った場合にぉ 、てのみ再生位置をメモリ 104に記録するようにす るため、再生位置情報を逐次記録する必要がなくなり、より効率的に電力の消費を行 うことが可能となる。  Further, the audio player according to the present embodiment detects the power level, and only records the playback position in memory 104 when the power level falls below the predetermined power level. There is no need to sequentially record position information, and power can be consumed more efficiently.
[0070] さらに、本発明に係るオーディオプレーヤが備える太陽電池の形状を平面的や立 体的な多面体にすることにより、太陽光の供給を受けやすい外観を備えたオーディ ォプレーヤとして、集光効率を向上させて、より効率的に太陽電源を用いる事が可能 となる。  [0070] Furthermore, by making the shape of a solar cell included in the audio player according to the present invention into a planar or a cubic polyhedron, the light collection efficiency can be improved as an audio player having an appearance easily supplied with sunlight. It is possible to use the solar power more efficiently by improving.
(実施の形態 2)  (Embodiment 2)
以下、本発明の実施の形態 2におけるオーディオプレーヤについて図面を参照し ながら説明する。尚、本実施の形態 2に係るオーディオプレーヤは、電力レベルを検 出する検出装置を備え、再生装置では検出装置において検出された電力レベルに 応じた再生モードにより再生を行うことを特徴とする。  Hereinafter, an audio player according to Embodiment 2 of the present invention will be described with reference to the drawings. Note that the audio player according to the second embodiment includes a detecting device for detecting a power level, and the reproducing device performs reproduction in a reproducing mode corresponding to the power level detected by the detecting device.
[0071] 図 10は本実施の形態 2におけるオーディオプレーヤ 14の機能構成を示す図であ る。 オーディオプレーヤ 14を構成する記録媒体 100には音声データが記録され、再生 装置 101は記録媒体 100に記録された音声データを再生する。駆動電源モジユー ル 102は太陽電池 103からの電力を再生装置 101及び検出装置 106に供給する。 太陽電池 103は太陽光を電力に変換する。検出装置 106は再生装置 101に供給さ れる電圧レベル、電流レベル、或いは電力レベルを検出する。 FIG. 10 is a diagram showing a functional configuration of the audio player 14 according to the second embodiment. Audio data is recorded on a recording medium 100 constituting the audio player 14, and a reproducing device 101 reproduces the audio data recorded on the recording medium 100. The driving power supply module 102 supplies power from the solar cell 103 to the reproducing device 101 and the detecting device 106. The solar cell 103 converts sunlight into electric power. The detecting device 106 detects a voltage level, a current level, or a power level supplied to the reproducing device 101.
[0072] 図 11は、本実施の形態 2の記録媒体 100に記録される音声データ 1100のデータ 構成図を示している。 FIG. 11 shows a data configuration diagram of audio data 1100 recorded on recording medium 100 according to the second embodiment.
[0073] ここで記録媒体 100には、 MPEG規格 AAC + SBR(Spectral Band Replication)方 式で符号化された音声データ 1100が記録されているものとする。 AAC + SBR方式 は、国際標準規格 MPEG (ISOZlEC14496— 3)で規格ィ匕された方式で、図 11に 示すように、従来の AAC方式 (ISOZIEC13818— 7)の音声データの再生帯域を 拡大するような補助情報が AACの符号ィ匕データとともに記録された方式である。図 7 の網掛けの部分が従来の AAC部の音声データ、網掛けでな 、部分が再生帯域を 拡大するような補助情報、即ち SBR部の音声データである。再生装置 101は、前記 AAC + SBR方式の音声データから、 AAC部のみを取り出して再生する機能と、 AA C部と SBR部とを取り出して再生する機能とを備えて ヽる。  Here, it is assumed that the recording medium 100 records audio data 1100 encoded by the MPEG standard AAC + SBR (Spectral Band Replication). The AAC + SBR method is a method that is standardized by the international standard MPEG (ISOZlEC14496-3). As shown in Fig. 11, the AAC + SBR method expands the audio data playback band of the conventional AAC method (ISOZIEC13818-7). This is a method in which important auxiliary information is recorded together with AAC encoding data. The shaded portion in FIG. 7 is the conventional audio data of the AAC unit, and the hatched portion is auxiliary information for expanding the reproduction band, that is, the audio data of the SBR unit. The playback device 101 has a function of extracting and reproducing only the AAC section from the AAC + SBR audio data, and a function of extracting and reproducing the AAC section and the SBR section.
[0074] 以上のように構成されたオーディオプレーヤ 14の動作について以下説明する。  The operation of the audio player 14 configured as described above will be described below.
図 12は、本実施の形態 2に係るオーディオプレーヤ 14の再生動作手順を示すフロ 一チャートである。  FIG. 12 is a flowchart showing a playback operation procedure of the audio player 14 according to the second embodiment.
[0075] まず、記録媒体 100には、音源としての AAC + SBR方式の音声データが格納され ている。記録媒体 100は、例えば半導体メモリカード、音声データはデジタル的に圧 縮符号化された信号であることが、機器の小型化、低コストィ匕のためにふさわしいが、 ハードディスクや光ディスク等のディスク媒体でも良 、。  First, the recording medium 100 stores AAC + SBR audio data as a sound source. The recording medium 100 may be a semiconductor memory card, for example, and the audio data may be digitally compression-encoded signals, which is suitable for miniaturization of equipment and low cost. Good,.
[0076] そして、再生装置 101は、記録媒体 100に記録された音声データを読み出し、再生 する（S1201)。例えば、再生装置 101から記録媒体 100に対し、音声データを逐次 読み出すためのアドレスを送出し、該アドレスに基づいて読み出された音声データを 再生装置 101が受け取り音声データを再生する。  Then, the reproducing device 101 reads out and reproduces the audio data recorded on the recording medium 100 (S1201). For example, an address for sequentially reading audio data is sent from the playback device 101 to the recording medium 100, and the playback device 101 receives the audio data read based on the address and plays the audio data.
[0077] ここで、音声データが圧縮符号化された信号の場合は、再生装置 101は、圧縮符 号化された信号を復号化する。本実施の形態 2においては、音声データは、 AAC + SBR方式の音声データであるので、再生装置 101は、 AAC部のみを取り出して AA Cデータを復号化するか、 AAC部と SBR部双方を取り出して、 AAC + SBRデータ を復号するかの選択肢がある。このどちらを選択するかは、検出装置 106の状態によ つて後述のように決定される。 Here, if the audio data is a signal that has been compression-encoded, the playback device 101 Decode the encoded signal. In the second embodiment, since the audio data is audio data of the AAC + SBR system, the reproducing apparatus 101 extracts only the AAC section and decodes the AAC data, or performs the decoding on both the AAC section and the SBR section. You have the option to extract and decrypt the AAC + SBR data. Which one to select is determined as described later according to the state of the detection device 106.
[0078] 一方、駆動電源モジュール 102は、太陽電池 103を有しており、記録媒体 100、再 生装置 101に電力を供給するが、その電力供給量は、逐次、検出装置 106によって 検出されている。 On the other hand, the drive power supply module 102 includes a solar cell 103 and supplies power to the recording medium 100 and the playback device 101. The power supply amount is sequentially detected by the detection device 106. I have.
[0079] さてここで、検出装置 106による検出値が所定の値より大きい時は（S1203で N)、 再生装置 101は、 AAC + SBRデータを復号し（S1204)、検出装置 106による検出 値が小さい時は（S1203で Y)、再生装置 101は、 AAC部のみを復号するようにする (S1205) o AAC + SBRデータを復号するために必要な電力は、 AAC部のみを復 号するために必要な電力より大きいので、太陽電池力もの電力供給が少なくなつたと きは AAC部のみを復号するように制御するのである。 When the value detected by the detecting device 106 is larger than the predetermined value (N in S1203), the reproducing device 101 decodes the AAC + SBR data (S1204), and the value detected by the detecting device 106 is when small (Y in S1203), the reproduction apparatus 101, the power required to decode to (S1205) o AAC + SBR data to decode only AAC section, only the AAC portion to decrypt Since the required power is larger than the required power, the control is performed so that only the AAC part is decoded when the power supply of the solar cell power decreases.
[0080] 以上の説明のように、本実施の形態 2に係るオーディオプレーヤは、駆動電源モジ ユール 102からの電力供給が十分な場合は、 AAC + SBRデータを復号して広帯域 な再生音を聴くことができ、逆に駆動電源モジュール 102からの電力供給が不十分 な場合は、 AAC部のみを復号して狭帯域な再生音になる力 電力不足による音切 れを防止することができることとなる。  As described above, when the power supply from driving power supply module 102 is sufficient, audio player according to the second embodiment decodes AAC + SBR data to listen to wideband reproduced sound. Conversely, if the power supply from the drive power supply module 102 is insufficient, only the AAC section is decoded to produce a narrow-band reproduced sound. .
[0081] そして、駆動電源モジュール 102からの電力供給が十分な場合は広帯域な再生で 、駆動電源モジュール 102からの電力供給が不十分な場合は、狭帯域な再生として 、電力不足による音切れを防止することを述べたが、その他にも、駆動電源モジユー ル 102からの電力供給が十分な場合は複数チャネル再生で、駆動電源モジュール 1 02からの電力供給が不十分な場合は、ステレオ再生や、モノラル再生など、もともと の再生チャネル数より少ないチャネル数の再生としても、電力不足による音切れを防 止することができる。  When the power supply from the drive power supply module 102 is sufficient, wideband reproduction is performed. When the power supply from the drive power supply module 102 is insufficient, narrow band reproduction is performed, and sound cutoff due to insufficient power is performed. However, when the power supply from the drive power supply module 102 is sufficient, multi-channel playback is used.When the power supply from the drive power supply module 102 is insufficient, stereo playback or Even when playing back a smaller number of channels than the original number of channels, such as monaural playback, it is possible to prevent sound interruption due to insufficient power.
[0082] また、駆動電源モジュール 102からの電力供給が十分な場合は立体音響の処理を 施した再生で、駆動電源モジュール 102からの電力供給が不十分な場合は、立体音 響の処理を施さない再生としても、電力不足による音切れを防止することができる。 If the power supply from the driving power supply module 102 is sufficient, the reproduction is performed with stereophonic processing. If the power supply from the driving power supply module 102 is insufficient, Even if the reproduction is performed without processing the sound, it is possible to prevent the sound from being cut off due to the power shortage.
[0083] さらに、駆動電源モジュール 102からの電力供給が十分な場合は重低音を強調し た再生で、駆動電源モジュール 102からの電力供給が不十分な場合は、重低音を 強調しない再生としても、電力不足による音切れを防止することができる。  Further, when the power supply from the driving power supply module 102 is sufficient, the bass reproduction is emphasized, and when the power supply from the driving power supply module 102 is insufficient, the reproduction without emphasizing the bass sound is performed. In addition, it is possible to prevent sound cutoff due to power shortage.
[0084] さらにまた、駆動電源モジュール 102からの電力供給が不十分な場合は十分な場 合より重低音の振幅を小さくする制御を施す再生をしても、電力不足による音切れを 防止することができる。  [0084] Furthermore, if the power supply from the drive power supply module 102 is insufficient, even if the reproduction is performed so that the amplitude of the heavy bass is made smaller than in the case where the power supply is insufficient, it is possible to prevent the sound from being cut off due to insufficient power. Can be.
[0085] このように、本実施の形態 2に係るオーディオプレーヤ 14は、電力レベルを検出す る検出装置 106を備えて、太陽光の供給が不足した場合等の検出値に応じて、再生 品質を制御することができ、再生時の音切れ等を効率的に防止することができる。  [0085] As described above, the audio player 14 according to the second embodiment includes the detection device 106 that detects the power level, and reproduces the reproduction quality according to the detection value when the supply of sunlight is insufficient. Can be controlled, and sound breaks during reproduction can be effectively prevented.
[0086] 尚、上述の各実施の形態においては、音響装置として携帯型のオーディオプレー ャを用いて説明を行ったが、音響装置はこれに限定されるものではなぐ太陽電池を 用いて音声データを再生する機能を有する音響装置であれば良 、。 産業上の利用可能性  [0086] In each of the above-described embodiments, a description has been given using a portable audio player as an audio device. However, the audio device is not limited to this. Any audio device that has the function of playing back music is acceptable. Industrial applicability
[0087] 本発明に力かる音響装置は、太陽電池を駆動電源とする携帯型オーディオプレー ャ等、特に小型化が必要な携帯機器に応用できる。 [0087] The acoustic device embodying the present invention can be applied to a portable audio player or the like that uses a solar cell as a driving power source, and particularly to a portable device that requires miniaturization.

Claims

請求の範囲 The scope of the claims
[1] 駆動電源モジュールとして太陽電池を備えた音響装置であって、  [1] An acoustic device including a solar cell as a drive power supply module,
音声データが記録された記録媒体と、  A recording medium on which audio data is recorded,
前記記録媒体に記録された音声データを再生する再生手段と、  Reproducing means for reproducing the audio data recorded on the recording medium,
前記再生手段が再生している音声データの再生位置を示す再生位置情報を格納 するためのメモリと、  A memory for storing reproduction position information indicating a reproduction position of the audio data being reproduced by the reproduction means;
前記メモリに前記再生位置情報を格納するタイミングを決定して、前記再生位置情 報を前記メモリに記録する記録手段とを備え、  Recording means for determining a timing for storing the reproduction position information in the memory, and recording the reproduction position information in the memory;
前記再生手段は、前記太陽電池からの電力供給が不足したときは再生を停止し、 前記太陽電池からの電力供給が復帰した場合には前記メモリに記録されている前記 再生位置情報に基づ 、て再生を再開する  When the power supply from the solar cell is insufficient, the reproducing unit stops the reproduction, and when the power supply from the solar cell is restored, based on the reproduction position information recorded in the memory, Resume playback
ことを特徴とする音響装置。  An acoustic device, characterized in that:
[2] 前記駆動電源モジュールは、充電池又は乾電池をさらに備え、  [2] The drive power supply module further includes a rechargeable battery or a dry battery,
前記メモリは、少なくとも前記充電池又は前記乾電池からの電力供給を受ける ことを特徴とする請求項 1記載の音響装置。  2. The audio device according to claim 1, wherein the memory receives power supply from at least the rechargeable battery or the dry battery.
[3] 前記音響装置は、さらに、  [3] The acoustic device further comprises:
前記駆動電源モジュールによって供給される電圧レベル、電流レベル、及び電力 レベルの少なくとも 1つを検出する検出手段を備え、  Detecting means for detecting at least one of a voltage level, a current level, and a power level supplied by the driving power supply module;
前記記録手段は、前記検出手段によって検出された値が所定値を下回った場合に ぉ 、て、前記メモリに前記再生位置情報を記録する  The recording means records the reproduction position information in the memory when the value detected by the detection means falls below a predetermined value.
ことを特徴とする請求項 1記載の音響装置。  2. The acoustic device according to claim 1, wherein:
[4] 前記記録手段は、前記充電池又は前記乾電池からの電力供給が不足する前に、 前記メモリに、前記再生位置情報を記録する [4] The recording unit records the reproduction position information in the memory before the power supply from the rechargeable battery or the dry battery becomes insufficient.
ことを特徴とする請求項 2記載の音響装置。  3. The acoustic device according to claim 2, wherein:
[5] 前記再生手段は、少なくとも、前記検出手段における検出値が所定値以上の場合 には第一再生モードを用 、て再生を行 ヽ、前記検出手段における検出値が前記所 定値未満の場合には前記第一再生モードよりも再生時の消費電力が少ない第二再 生モードで再生を行う ことを特徴とする請求項 3記載の音響装置。 [5] The reproduction means performs reproduction using the first reproduction mode at least when the detection value of the detection means is equal to or more than a predetermined value, and when the detection value of the detection means is less than the predetermined value. Playback in the second playback mode, which consumes less power during playback than the first playback mode 4. The acoustic device according to claim 3, wherein:
[6] 前記第一再生モードは、再生帯域拡大技術を用いた再生であり、 [6] The first playback mode is playback using a playback band expansion technique,
前記第二再生モードは、再生帯域拡大技術を用いな!/、再生である  The second playback mode does not use the playback band expansion technology!
ことを特徴とする請求項 5記載の音響装置。  6. The acoustic device according to claim 5, wherein:
[7] 前記再生帯域拡大技術を用いた再生は、 MPEG規格 AAC + SBR方式の再生で あり、 [7] The reproduction using the reproduction band expansion technology is the reproduction of the MPEG standard AAC + SBR system,
前記再生帯域拡大技術を用いな!/、再生は、 MPEG規格 AAC方式の再生である ことを特徴とする請求項 6記載の音響装置。  7. The audio device according to claim 6, wherein the reproduction is not performed using the reproduction band expansion technology, and reproduction is performed according to the MPEG standard AAC method.
[8] 前記第一再生モードは、低周波数成分を再生する再生であり、 [8] The first reproduction mode is reproduction for reproducing low frequency components,
前記第二再生モードは、低周波数成分を再生しな!ヽ再生である  In the second reproduction mode, low-frequency components are not reproduced.
ことを特徴とする請求項 5記載の音響装置。  6. The acoustic device according to claim 5, wherein:
[9] 前記第一再生モードは、立体音響処理を伴った再生であり、 [9] The first playback mode is playback with stereophonic processing,
前記第二再生モードは、立体音響処理を伴わな!/、再生である  The second playback mode does not involve stereophonic processing! /
ことを特徴とする請求項 5記載の音響装置。  6. The acoustic device according to claim 5, wherein:
[10] 前記充電池又は前記乾電池は、前記メモリに、前記再生位置情報を格納するため に必要な時間を Tとした時、前記太陽電池からの電力供給が不足したときに、少なく とも前記 T時間は電力を供給できる容量を有する [10] The rechargeable battery or the dry battery is configured such that when the time required for storing the reproduction position information in the memory is T, when the power supply from the solar cell is insufficient, at least the T Time has the capacity to supply power
ことを特徴とする請求項 2記載の音響装置。  3. The acoustic device according to claim 2, wherein:
[11] 前記音響装置は、さらに、 [11] The acoustic device further includes:
前記太陽電池力 供給される電力を充電する充電手段を備え、  The solar cell power comprises charging means for charging the supplied power,
前記再生手段は、前記充電手段から電力供給を受けて前記再生を行う ことを特徴とする請求項 1記載の音響装置。  2. The audio device according to claim 1, wherein the reproduction unit performs the reproduction by receiving power supply from the charging unit.
[12] 前記駆動電源モジュールは、平面的に構成され、 [12] The drive power supply module is configured to be planar,
前記太陽電池は、前記駆動電源モジュールの表裏両面に貼り付けられる ことを特徴とする請求項 1記載の音響装置。  The acoustic device according to claim 1, wherein the solar cell is attached to both front and back surfaces of the drive power supply module.
[13] 前記駆動電源モジュールは、多面体で構成され、 [13] The drive power supply module is formed of a polyhedron,
前記太陽電池は、前記多面体の少なくとも 1部の表面に貼り付けられる ことを特徴とする請求項 1記載の音響装置。 The acoustic device according to claim 1, wherein the solar cell is attached to at least a part of a surface of the polyhedron.
[14] 前記音響装置は、さらに、 [14] The acoustic device further includes:
前記再生手段で再生された音声データを出力するヘッドホンを有し、  Having headphones for outputting audio data reproduced by the reproducing means,
前記ヘッドホンと前記再生手段とを結ぶケーブルに前記太陽電池が装着されてい る  The solar cell is attached to a cable connecting the headphones and the reproducing means.
ことを特徴とする請求項 1記載の音響装置。  2. The acoustic device according to claim 1, wherein:
[15] 前記音響装置は、さらに、 [15] The acoustic device further includes:
前記再生手段で再生された音声データを出力するヘッドホンを備え、 前記太陽電池と前記ヘッドホンとは一体ィ匕するように接続されて 、る  A headphone for outputting audio data reproduced by the reproducing means, wherein the solar cell and the headphones are connected so as to be integrated.
ことを特徴とする請求項 1記載の音響装置。  2. The acoustic device according to claim 1, wherein:
[16] 前記記録媒体及び前記メモリは、不揮発性の半導体メモリである [16] The recording medium and the memory are nonvolatile semiconductor memories.
ことを特徴とする請求項 1記載の音響装置。  2. The acoustic device according to claim 1, wherein:
[17] 前記駆動電源モジュールには、光が前記太陽電池に集光して照射するための集 光用レンズが取り付けられる [17] The drive power supply module is provided with a condensing lens for condensing and irradiating the solar cell with light.
ことを特徴とする請求項 1記載の音響装置。  2. The acoustic device according to claim 1, wherein:
[18] 前記音響装置は、さらに、 [18] The acoustic device further includes:
前記駆動電源モジュールを所望の位置に固定するための止め具を備える ことを特徴とする請求項 1記載の音響装置。  The acoustic device according to claim 1, further comprising a stopper for fixing the drive power supply module at a desired position.
[19] 駆動電源用モジュールとして太陽電池を備えた音響装置における再生方法であつ て、 [19] A reproduction method in an audio device including a solar cell as a driving power supply module,
前記音響装置は、  The sound device,
音声データが記録された記録媒体と、  A recording medium on which audio data is recorded,
再生している音声データの再生位置を示す再生位置情報を格納するためのメモリ とを備え、  A memory for storing reproduction position information indicating the reproduction position of the audio data being reproduced,
前記再生方法は、  The reproduction method includes:
前記記録媒体に記録された音声データを再生する再生ステップと、  A reproducing step of reproducing audio data recorded on the recording medium,
前記メモリに前記再生位置情報を格納するタイミングを決定して、前記再生位置情 報を前記メモリに記録する記録ステップとを含み、  Recording a timing of storing the reproduction position information in the memory, and recording the reproduction position information in the memory;
前記再生ステップにおいては、前記太陽電池力 の電力供給が不足したときは再 生を停止し、前記太陽電池からの電力供給が復帰した場合には前記メモリに記録さ れて 、る前記再生位置情報に基づ!、て再生を再開する In the regeneration step, when the power supply of the solar cell power is insufficient, When the power supply from the solar cell is restored, reproduction is restarted based on the reproduction position information recorded in the memory.
ことを特徴とする再生方法。  A reproduction method characterized by the above-mentioned.
[20] 駆動電源用モジュールとして太陽電池を備えた音響装置において使用されるプロ グラムであって、  [20] A program used in an acoustic device having a solar cell as a driving power supply module,
前記音響装置は、  The sound device,
音声データが記録された記録媒体と、  A recording medium on which audio data is recorded,
再生している音声データの再生位置を示す再生位置情報を格納するためのメモリ とを備え、  A memory for storing reproduction position information indicating the reproduction position of the audio data being reproduced,
前記プログラムは、  The program is
前記記録媒体に記録された音声データを再生する再生ステップと、  A reproducing step of reproducing audio data recorded on the recording medium,
前記メモリに前記再生位置情報を格納するタイミングを決定して、前記再生位置情 報を前記メモリに記録する記録ステップとを含み、  Recording a timing of storing the reproduction position information in the memory, and recording the reproduction position information in the memory;
前記再生ステップにおいては、前記太陽電池力 の電力供給が不足したときは再 生を停止し、前記太陽電池からの電力供給が復帰した場合には前記メモリに記録さ れて 、る前記再生位置情報に基づ!、て再生を再開する  In the reproducing step, when the power supply of the solar cell power is insufficient, the reproduction is stopped, and when the power supply from the solar cell is restored, the reproduction position information is recorded in the memory. Resume playback based on!
ことを特徴とするプログラム。  A program characterized by that.
[21] 前記請求項 1記載の音響装置を置くための音響装置用置き台であって、光が前記 太陽電池に集光して照射するための集光用レンズを備える [21] An acoustic device holder for placing the acoustic device according to claim 1, comprising a condensing lens for condensing and irradiating the solar cell with light.
ことを特徴とする音響装置用置き台。  A stand for an acoustic device, characterized by that:
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