WO2005106871A1 - Processeur de données et programme de traitement des données - Google Patents

Processeur de données et programme de traitement des données Download PDF

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Publication number
WO2005106871A1
WO2005106871A1 PCT/JP2005/004603 JP2005004603W WO2005106871A1 WO 2005106871 A1 WO2005106871 A1 WO 2005106871A1 JP 2005004603 W JP2005004603 W JP 2005004603W WO 2005106871 A1 WO2005106871 A1 WO 2005106871A1
Authority
WO
WIPO (PCT)
Prior art keywords
data
buffer memory
memory
reproduction
processor
Prior art date
Application number
PCT/JP2005/004603
Other languages
English (en)
Japanese (ja)
Inventor
Takehiko Yasuda
Yoshiteru Adachi
Yuji Kaihotsu
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
Priority claimed from JP2004133820A external-priority patent/JP2005317108A/ja
Priority claimed from JP2004133819A external-priority patent/JP2005317107A/ja
Application filed by Matsushita Electric Industrial Co., Ltd. filed Critical Matsushita Electric Industrial Co., Ltd.
Publication of WO2005106871A1 publication Critical patent/WO2005106871A1/fr

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10527—Audio or video recording; Data buffering arrangements
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00007—Time or data compression or expansion
    • G11B2020/00014—Time or data compression or expansion the compressed signal being an audio signal
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10527—Audio or video recording; Data buffering arrangements
    • G11B2020/1062—Data buffering arrangements, e.g. recording or playback buffers
    • G11B2020/10675—Data buffering arrangements, e.g. recording or playback buffers aspects of buffer control
    • G11B2020/10703—Data buffering arrangements, e.g. recording or playback buffers aspects of buffer control processing rate of the buffer, e.g. by accelerating the data output

Definitions

  • the present invention relates to a data processing apparatus and a data processing program, and more particularly, to a data processing apparatus suitable as an accumulation and reproduction apparatus for information read from a medium disk or the like, and further to a navigation system for effective data processing.
  • the present invention relates to an apparatus, a data processing program suitable for being installed in an accumulation and reproduction apparatus of information read from a medium disk or the like, and further an effective data processing program for being equipped in a navigation system.
  • a conventional data processing apparatus and data processing program of this type are known as, for example, a recording and reproducing apparatus as shown in FIG. 4 and a control program thereof (see, for example, Patent Document 1).
  • This device has, in addition to a pickup 31, an analog / digital converter (hereinafter simply referred to as an AD converter) 33, a compression circuit 34, a recording buffer memory 35, an encoder 36 and a recording circuit 37 as components constituting an information recording unit.
  • a DA converter digital-to-analog converter
  • the external input data Sin is converted to a digital signal by the AD converter 33, and then compressed by the compression circuit 34 and temporarily stored in the recording buffer memory 35.
  • the data accumulated here is compression encoded by the encoder 36 and sent to the recording circuit 37 as encoded information. Then, in the recording circuit 37, in accordance with a predetermined write control signal from the CPU 43, write processing of coded information to the medium disk 30 is performed.
  • the information recorded on the medium disk 30 is read into the reproduction circuit 38 through the pickup 31, decoded by the decoder 39, and stored in the reproduction buffer memory 40, and the sequential expansion circuit 41 is stored. , And is analog output at the DA converter 42.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 11 273246
  • the present invention has been made to solve such conventional problems, and provides a data processing apparatus capable of processing and reproducing read information from an external memory such as a medium disk without interruption. It is an object of the present invention to provide a data processing program capable of executing reproduction processing using data from an external memory such as a disk-like recording medium at high speed while suppressing CPU load.
  • a data processing apparatus is a processor that reads external memory data storing data and processes the data, and a processor that is accessed by the processor and stores processing data of the processor And a second knocker memory which is accessed by the processor at an access speed smaller than the access speed to the first buffer memory than the access speed to the external memory by the processor. It is characterized by [0010] With this configuration, even if data reading from external memory or transfer input is easily interrupted, data can be stored in the second knocker memory whose access speed is faster than that of data input. It is possible to continuously execute high-speed data processing using the first buffer memory while absorbing the influence by the second buffer memory even if the data reading or transfer input is temporarily interrupted. become.
  • the second buffer memory is preferably a storage device having a storage capacity larger than that of the first buffer memory.
  • the access speed is faster than the speed of reading or transferring data from the external memory, and there is room for input data such as read data to the second buffer memory with a larger storage capacity value than the first buffer memory.
  • the first buffer memory can be stored by holding it, and even if the data read from the external memory or the transfer input is temporarily interrupted, the second buffer memory reliably absorbs the influence of the first buffer memory.
  • the high-speed data processing used can be continuously executed.
  • the second buffer memory is a fixed storage device such as a node disk or a solid state memory card, it may be difficult to read outside when the outside air or dust gets into the reading unit or the reading becomes unstable. The problem is avoided, and the second buffer memory can be effectively used as a shockproof memory together with the first buffer memory.
  • the storage device may be a removable storage device.
  • a data processing program stores a computer in a storage device for storing data stored in an external memory in a storage device, and the storage device stores the data by the storage device. It is characterized in that it functions as a compression means for compressing data and a reproduction means for reproducing data stored in the storage device when the compression means is compressing.
  • the reproduction means is characterized in that the data compressed by the compression means is reproduced when the data compression by the compression means is completed.
  • input data is temporarily stored by a second buffer memory whose access speed is faster than data input from an external memory, and data input from the external memory is temporarily interrupted. Also, since it is possible to continuously execute high-speed data processing such as ripping using the first knock-off memory while absorbing it with the second buffer memory, reading of the removable disk-like recording medium becomes unstable. Easy vibration ⁇ It is possible to provide a data processing device capable of effectively preventing the interruption of reproduction information such as a sound skipping even in an impact environment, for example, in a vehicle traveling off road.
  • the compression means executes data compression processing
  • data stored in the read data format in the storage device can be used even if the data compression process is being performed. Since reproduction output processing can be executed by the reproduction means without performing code processing, even if high-speed data transfer is performed from an external memory such as a disk-shaped recording medium, the reproduction processing using that data can be performed by the CPU load. It is possible to provide a data processing program that can be executed reliably while suppressing the
  • FIG. 1 is a block diagram showing a schematic configuration of a recording and reproducing apparatus of an on-vehicle navigation system equipped with a data processing program according to one embodiment of the present invention.
  • FIG. 2 is an explanatory diagram for explaining the structure of a storage area of a storage device according to an embodiment of the present invention.
  • FIG. 3 is a flow chart of an essential part of a data processing program according to an embodiment of the present invention.
  • FIG. 4 is a block diagram showing the configuration of a conventional recording and reproducing apparatus
  • Second buffer memory (storage device)
  • A5 Work area that is the PCM data storage area for ripping
  • the present embodiment is an application of the data processing apparatus of the present invention to a recording and reproduction apparatus (hereinafter simply referred to as a recording and reproduction apparatus) of a navigation system for vehicles, and is equipped with the data processing program of the present invention. It is
  • the recording and reproducing apparatus reproduces and compresses read data from disc-shaped recording medium 1 (external memory) and input data from other external memory.
  • a multi-threaded processor 11 for storing and processing, a first buffer memory 12 accessed by the processor 11, and a second knock memory 13 accessed by the processor 11 are provided.
  • the disc-shaped recording medium 1 is a removable recording medium for storing predetermined data, and may be, for example, an optical readable CD (Compact Disc), a DVD (Digital Versatile Disc) or another optical disc. There is.
  • the data recorded on the disc-shaped recording medium 1 is, for example, PCM (Pulse Code Modulation) digital audio data such as CD-DA (Compact Disc Digital Audio), but MP3 (MPeg audio layer 3) compressed data
  • the image data may be included without limitation.
  • the disc-shaped recording medium 1 is not limited to the optical disc, and the first buffer memory 12 and the second buffer memory 12 are not limited.
  • the transfer data transfer rate of read data must be slower than that of the buffer memory 13 as a removable data storage medium!
  • the data recorded on the disc-shaped recording medium 1 is read by a CDZ DVD deck or other disc drive 10 and transferred and output at a predetermined data transfer rate. That is, the disk drive 10 is a means for inputting and transferring data from the external memory.
  • the disc drive 10 not only reproduces data recorded on a disc-shaped recording medium 1 such as a CD or DVD, but also writes data on a disc-shaped recording medium 1 of a predetermined format such as a write-once type or a rewritable type. It is possible.
  • the processor 11 has a microcomputer configuration including a CPU, a memory, and an interface, and in the data processing, the processor 11 exchanges data to be processed with the first buffer memory 12 and the second buffer memory 13.
  • DMA transfer direct memory access method data transfer processing
  • the first buffer memory 12 readably stores data to be subjected to data processing in the processor 11 and exchanges data with the processor 11 being processed.
  • the first buffer memory 12 is composed of a semiconductor memory device which functions as a high-speed buffer memory having a data storage capacity of, for example, about 2 megabytes.
  • the processor 11 is a first storage area of the second buffer memory 13 in a data format at the time of reading capable of normal reproduction of read data in response to a reproduction request input, for example, PCM digital audio data (see FIG. Read function thread T1 as storage means to be temporarily stored in the LBA area in the following; and compression encoding processing of read data corresponding to recording request input, for example, AAC (Advanced Audio Coding) encoding processing
  • the encoding function thread T2 as compression means and the encoded data are stored in a second storage area (FAT area in FIG. 1; described later) of the second buffer memory 13 as a music data file for one song, for example.
  • Accumulated recording here the accumulated recording function thread T3 for recording, and stored data temporarily stored in the second Knoffer memory 13 in response to the reproduction request input ,
  • the first reproduction function thread T4 as a reproduction means for voice reproduction output Te is encoding process of the second buffer memory 13
  • Data stored in the AT area for example, an AAC data file for one music track is read and decoded.
  • the decoding function thread T5 as a reproduction means after compression completion for decoding processing is executed, and a plurality of other Thread T6 can be executed, for example, a thread for updating position information of a vehicle on a navigation map, search processing, video reproduction, operation of a human 'machine' interface (hereinafter referred to as “ ⁇ ”), and the like.
  • the second buffer memory 13 includes an LBA (Logical Block Addressing) area as a first storage area which can quickly read the recording information by logical block address management, and one or more predetermined OSs It has a FAT (File Allocation Table) area as a second storage area for readably recording and storing file information of a predetermined file format handled by the operating system.
  • LBA Logical Block Addressing
  • FAT File Allocation Table
  • the second buffer memory 13 is a read-only first LBA area Al, map data FAT area A2, music data TFAT
  • TFAT area A3 It has a Transaction-safe FAT area A3, a FAT area A4 for HMI data, and a work area A5 which is a PCM data storage area for reading.
  • TFAT area encoded AAC data is recorded so as to be readable in the file format of the TFAT file system.
  • the TFAT file system is designed to prevent the loss of transaction data on a memory card or hard disk when power supply is low.
  • the second buffer memory 13 is configured of a storage device having a storage capacity larger than that of the first buffer memory 12, for example, a node disk drive or a memory card excellent in vibration resistance performance.
  • the hard disk here is a small one to be mounted on a portable information device
  • the memory card here is a card or stick having a semiconductor memory element of about the size of a PC card or less.
  • the fixed recording medium referred to here is one in which the medium storing the information is not separated from the apparatus main body reading the information on the medium.
  • the second buffer memory 13 is configured as a storage device removable from the navigation system case (not shown) as a whole of the device, and it is possible to replace, repair, or compress data in advance. It is designed to be able to replaceably store stored storage devices.
  • the data transfer rate of the second buffer memory 13 is, for example, 10 megabytes per second to 30
  • the speed is about meganoitos per second, and this speed is the first buffer memory 12 which is larger than the transfer rate of read data of 10 powers of the disk drive (access speed to external memory; for example, 170 kilobytes per second to 1.7 megabytes per second).
  • the speed of writing and reading data which is the access speed of the second buffer memory 13 is faster than the transfer speed of read data from the disk drive 10, and the data transfer speed of the first buffer memory 12 (for example, 200). More than a megabyte per second).
  • the CD-DA data recorded on the disc-shaped recording medium 1 is converted to ATAPI (AT Attachment Packet) in response to a request from the reading function thread T1 (storage means) of the processor 11.
  • ATAPI AT Attachment Packet
  • DMA Direct Memory Access
  • the read data transferred and output here is, for example, the second LBA of the second buffer memory 13 with the data of one track of the recording track on the disk-like recording medium 1 (hereinafter referred to as track data) as the writing unit.
  • the data is written to a plurality of logical blocks in area A5.
  • Such writing (storing) of data to the second buffer memory 13 is performed by allocating logical block addresses in the order of track numbers, as shown by TRK1, TRK2, TRK3 '' in FIG. It is executed on the data of all the recording tracks on the recording medium 1.
  • the processor 11 can immediately read any track data from the second buffer memory 13 by designating the logical block address in the second LBA area A5.
  • Reading of stored data from the second buffer memory 13 is reading of data for AAC encoding processing (indicated by an arrow db in FIG. 1) based on logical block address information for each data writing unit, A plurality of read out paths (indicated by an arrow dc in FIG. 1) and a plurality of read out paths are prepared to use PCM data of another track different from the track being read out for reproduction output.
  • encoding function thread T 2 (compression of processor 11) Means to execute AAC encoding processing and store and record AAC data of a predetermined file size in the second buffer memory 13 sequentially (indicated by an arrow de in FIG. 1) by the storage and recording function thread T 3 of the processor 11 be able to.
  • the first reproduction function thread T4 (reproduction means) of the processor 11 sequentially performs PCM reproduction of the desired music by sequentially using the track data in the PCM data format as it was at the time of reading.
  • the decode function thread 5 (the reproduction means after completion of compression), which is the second reproduction function of the player 11 according to the reproduction request input It is decoded appropriately, and reproduced and output by the amplifier 15 and the speaker 16.
  • the switching between the PCM reproduction and the reproduction by AAC decoding described above is achieved by repeatedly executing the discrimination process as shown in FIG. 3 at a predetermined cycle.
  • step S1 whether or not there is a recording request based on a user operation is checked (step S1), and if there is a request, the reading function thread T1 of the processor 11 checks the data from the disc-shaped recording medium 1 A read is performed (step S2), and the read data is stored in the LBA area of the second buffer memory 13 (step S3). Then, based on the stored data, AAC encoding processing by the encoding function thread 2 is performed, that is, compression encoding of read data is performed, and the compressed data is stored by the accumulation recording function thread 3. Is recorded in a predetermined file format in the FAT area of the file (step S4).
  • step S5 If there is no recording request at the time of the previous check (if YES in step SI), or if data compression and recording in step S4 are started, then whether or not there is a reproduction request based on user operation Is determined (step S5). At this time, if there is a reproduction request (YES in step S5), it is checked whether the AAC encoding process for data compression is in progress (step S6). If AAC encoding is in progress (YES in step S6) In the case of (1), the first playback function thread T4 also reads PCM audio data from the LBA area of the second buffer memory 13 in a different path from reading for AAC encoding processing, and playback audio is output (step S7).
  • step S6 When the AAC encoding process is completed in step S6, the decoding function thread T5, which is the reproduction means after compression is completed, performs a decoding process of compressed data for the music for which reproduction is requested, and the reproduced sound is output. Is done (step S8).
  • the processor 11 is a disk by causing the processor 11, which is a computer, to execute the processing of the threads T1 and T5 as described above.
  • Storage means (thread T1) for storing the data stored in the second recording medium 1 in the second buffer memory 13 and compression means for compressing the data stored in the second knock out memory 13 by the storage means (thread T2) can be functioned as a reproduction means (thread T4) for reproducing data stored in the second knock out memory 13 when this compression means is compressed.
  • the compression means thread T2 is executing data compression processing, processing is performed using data stored in the second buffer memory 13 in the data format at the time of reading. It is possible to execute the reproduction process by the reproduction means thread T4 which does not perform the heavy load decoding process. Furthermore, by controlling the playback ratio of compressed data and PCM data, the CPU load can be reduced, and the processing capacity of software encoding can be increased.
  • the PCM reproduction process is executed until all songs for CD-pieces are completed, and CPU time allocation sufficient for the encoding process can be performed during the ripping, so that the ripping can be performed. Speed can be improved. In addition, you can specify the next song or all songs and play them even during high-speed ritsubing. However, in the case where encoding processing has just been started so that one or more songs can not be retribbed, retributing may be stopped and reproduction processing may be performed.
  • the reproduction means thread T5 after the compression is completed reproduces the data compressed by the compression means, so that the encoding process is completed.
  • compressed data can be decoded to perform various reproductions using stored data.
  • the access speed is faster than the data input, and the second Knoffer memory Disk-like recording media that can store data in 13 Even if the data read from 1 or the transfer input is temporarily interrupted, high-speed data processing using the first buffer memory 12 while absorbing it in the second buffer memory 13, for example, compression code It will be possible to continue to execute the decoy process.
  • the second buffer memory 13 is configured by a storage device having a storage capacity (for example, about 700-1 gigabyte) larger than the storage capacity (for example, about 2 megabytes) of the first buffer memory 12 Since it functions as a medium-speed buffer memory, the second buffer has an access speed faster than the speed of reading and transferring data from a disk-shaped recording medium and has a larger storage capacity than the first buffer memory 12 Input data such as read data can be accumulated with a margin in the memory 13, and the data read / transfer input from the disc-shaped recording medium 1 is an impact or vibration of the vehicle or the disc-shaped recording medium 1. Even if there is a temporary interruption due to dust or the like, it can be reliably absorbed by the second buffer memory 13 and, in the meantime, the first buffer It can be performed to continue high-speed data processing using memory 12.
  • a storage capacity for example, about 700-1 gigabyte
  • the storage capacity for example, about 2 megabytes
  • the second buffer memory 13 is a fixed storage device such as a node disk or a solid-state memory card, ambient air or dust may enter the reading unit or reading may be performed by vibration. If it becomes unstable, any problems will be avoided, and it is effective to use the second buffer memory 13 in combination with the first buffer memory 12 as a shockproof memory.
  • the storage device forming the second buffer memory is a removable storage device that can be attached and detached, the application of the present apparatus can be expanded (for example, option addition), or a disk
  • the storage capacity of the second memory 13 can be easily switched in response to the increase in the capacity of the external memory such as the recording medium 1, etc., and various requirements can be sufficiently met.
  • reading of the removable disk-shaped recording medium is unstable and easy to read.
  • the effect of effectively preventing discontinuation of reproduction information such as disc sound skipping is provided, and storage of music information etc. read on a medium disc is performed.
  • a playback device it is further useful as part of a navigation system.
  • decoding processing is performed using data stored in a read data format and stored in the storage device even while the compression means is executing data compression processing.
  • the reproduction processing using the data can be reliably performed while suppressing the CPU load even if the reproduction processing can be executed without reproducing.
  • the media disk is equipped with a data processing program suitable for storing and reproducing the read information, and further equipped with a navigation system for effective data. It is useful as a processing program.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

Un processeur de données capable de reproduire l'information lue à partir d'une mémoire externe, c'est-à-dire un disque moyen de façon ininterrompue, et un programme de traitement des données capable d'effectuer le traitement de reproduction tout en supprimant la charge sur un ordinateur quand les données d'information sont sorties de la mémoire externe à un grand débit. Le processeur de données comprend un processeur (11) pour traiter les données d'un moyen d'enregistrement de type disque (1), une première mémoire tampon (12) pour stocker les données traitées, et une deuxième mémoire tampon (zone LBA) étant accédée à un débit plus élevé que celui du moyen d'enregistrement (1) mais plus bas que celui de la mémoire (12). Le programme de traitement des données exécute la filière T1 d'un moyen de stockage fonctionne pour stocker des données stockées sur un moyen de type disque (10) dans un dispositif de stockage (zone FAT), la filière T2 d'une fonction de moyen de compression pour compresser les données stockées, et la filière T4 d'une fonction d'un moyen de reproduction pour reproduire les données stockées dans le dispositif (13) quand le moyen de compression compresse les données.
PCT/JP2005/004603 2004-04-28 2005-03-16 Processeur de données et programme de traitement des données WO2005106871A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2004-133819 2004-04-28
JP2004-133820 2004-04-28
JP2004133820A JP2005317108A (ja) 2004-04-28 2004-04-28 データ処理装置
JP2004133819A JP2005317107A (ja) 2004-04-28 2004-04-28 データ処理プログラム

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Publication Number Publication Date
WO2005106871A1 true WO2005106871A1 (fr) 2005-11-10

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1703519A2 (fr) * 2005-03-14 2006-09-20 Sony Corporation Appareil et procédé de reproduction
JP2009301664A (ja) * 2008-06-16 2009-12-24 Sharp Corp カーナビゲーション装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08179894A (ja) * 1994-12-22 1996-07-12 Toshiba Corp メモリシステム及びディスク記録再生装置に適用されるメモリシステム
JPH09212424A (ja) * 1996-01-30 1997-08-15 Toshiba Corp ディスクキャッシュ及びディスクキャッシュ方法
JP2003228907A (ja) * 2002-02-01 2003-08-15 Matsushita Electric Ind Co Ltd 記録再生装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08179894A (ja) * 1994-12-22 1996-07-12 Toshiba Corp メモリシステム及びディスク記録再生装置に適用されるメモリシステム
JPH09212424A (ja) * 1996-01-30 1997-08-15 Toshiba Corp ディスクキャッシュ及びディスクキャッシュ方法
JP2003228907A (ja) * 2002-02-01 2003-08-15 Matsushita Electric Ind Co Ltd 記録再生装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1703519A2 (fr) * 2005-03-14 2006-09-20 Sony Corporation Appareil et procédé de reproduction
EP1703519A3 (fr) * 2005-03-14 2009-11-04 Sony Corporation Appareil et procédé de reproduction
JP2009301664A (ja) * 2008-06-16 2009-12-24 Sharp Corp カーナビゲーション装置

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