JP3867807B2 - Recording apparatus and recording method - Google Patents

Description

  The present invention relates to a recording apparatus and a recording method.

  For example, if an audio device mounted on a vehicle is provided with an HDD and the contents of the CD are copied to the HDD, the CD that the user wants to listen to can be found and reproduced more quickly than a CD changer or the like.

  In this case, the capacity of the music CD is approximately 760 Mbytes (≈44.1 kHz × 16 bits × 2 channels × 60 seconds × 74 minutes). If an appropriate data compression technique is used, the digital audio data on the CD can be compressed to a capacity of about 1/10.

  Therefore, even if music is completely stored on a CD, the digital audio data can be compressed to a data amount of about 80 Mbytes per CD. For example, if an 8 Gbyte HDD is prepared, You can copy over 100 CDs.

  In other words, compared to about 10 CDs that can be handled by an in-vehicle CD changer at a time, if the contents of the CD are compressed and copied to the HDD, a much larger number of CDs can be handled. Moreover, at that time, the target CD can be quickly selected and reproduced as described above.

For example, there are the following prior art documents.
Japanese Patent Laid-Open No. 10-162508 Japanese Patent Laid-Open No. 11-234615 JP-A-3-76082

  However, when the system as described above is constructed, if as many as 100 CDs can be copied, the same CD may be mistakenly copied twice. In order to avoid such trouble, the user must manage the copied CD, and the user needs to make a note of the name of the copied CD, for example.

  However, managing as many as 100 CDs is difficult, and eventually the same CD may be copied twice.

  The present invention is intended to solve such problems.

In this invention,
The digital audio data and the TOC reproduced from the CD on which the digital audio data and the TOC for managing the digital audio data are recorded are recorded on the HDD , and the data generated from the TOC is already stored in the HDD. Recording means for recording in a management table for managing data generated from the TOC of a recorded CD ;
When the reproduced digital audio data is recorded on the HDD by the recording means , data generated from the TOC , data generated from the TOC of a CD already recorded on the management table, and based on, it has a control means for controlling permission or prohibition of recording the digital audio data to be the reproduction,
When the recording of digital audio data from a specific CD is permitted, the control means is a recording device that controls to update the management table based on data generated from the TOC of the specific CD. It is.

  According to the present invention, it is possible to prevent a CD from being duplicated by mistake, and for example, the capacity of the HDD is not wasted. In addition, at that time, it is not necessary for the user to manage whether or not the target CD has been copied to the HDD, and double copying can be automatically prevented.

  If it is not known whether the target CD has been copied, the copy operation can be performed on the CD. If the CD has not been copied yet, the copy is executed. Duplicate copying is not performed. In addition, for this purpose, it is only necessary to prepare a management table in the HDD, and no special hardware is required.

  FIG. 1 shows an example of a device according to the invention, centered on audio signal lines.

  That is, reference numeral 10 is a CD on which, for example, music digital audio data is recorded. If this CD 10 is a CD according to the “CD text” standard, additional character information of the CD 10, for example, the title of the CD 10, is included in the R to W channels included in the track of the lead-in area of the CD 10. Data such as musicians and performers are recorded.

  The CD 10 is reproduced by a CD drive device 21 as reproduction means, and digital audio data subjected to reproduction processing such as demodulation and error correction is taken out from the CD drive device 21, and this digital audio is extracted. Data is supplied to the bus line 29.

  The bus line 29 is connected with a buffer memory 22 and an encoder circuit 23 for data compression. The encoder circuit 23 is constituted by a DSP, for example, and compresses digital audio data reproduced from the CD 10 to a data amount of about 1/10 by, for example, ATRAC processing (ATRAC is a registered trademark).

  Further, for example, an HDD 24 is connected to the bus line 29 as a large capacity recording means. The HDD 24 is for storing digital audio data of the CD 10 (digital audio data after data compression), and has a capacity of, for example, 16 GB. Therefore, the HDD 24 can record and reproduce the digital audio data compressed for at least 100 CDs as described above.

  In addition, in the HDD 24, for example, a management table 24T as shown in FIG. 3 is prepared as one file. When the digital audio data of the CD 10 is compressed and stored or written in the HDD 24, the management table 24T stores information for specifying the writing source CD 10 and the writing position of each track of the written CD 10 (HDD 24). The writing position).

  For this reason, for example, 100 data columns # 1 to # 100 are prepared in the management table 24T. Each of the data columns # 1 to # 100 corresponds to one CD on which digital audio data is recorded on the HDD 24. Further, # 1 to # 100 indicate CDs whose contents are copied to the HDD 24. It is also used as the CD number when selecting.

  In each of the data columns (CD numbers) # 1 to # 100, “TOC data”, “number of tracks”, “start position and end position of track 1”, “start position and end position of track 2”, ..., Cells of “start position and end position of last track” and “CD title” are prepared.

  Here, the CD 10 has time information about the track in the TOC, and this TOC generally differs for each CD 10. Therefore, the TOC data is used as data for specifying or searching for the CD 10, and the TOC data is written as search information in the “TOC data” cell.

  Further, the total number of tracks of the corresponding CD 10 is written in the “number of tracks” cell. In addition, in the cells of “start position and end position of track 1” to “start position and end position of last track”, the write start position and write end position in the HDD 24 of each track (track in the CD 10) are written. .

  In the “CD title” cell, character data to be displayed as the title of the CD 10 at the time of reproduction from the HDD 24 or the like is written. For example, when the CD 10 is a CD of the CD text standard, the character information recorded in the R to W channels in the lead-in area can be copied and written.

  Further, a decoder circuit 25 and an audio output circuit 26 are connected to the bus line 29. In this case, the decoder circuit 25 is constituted by a DSP, for example, and performs decoding processing complementary to the encoder circuit 23 to decode the digital audio data that has been compressed into original digital audio data before data compression. is there.

  The audio output circuit 26 has a D / A converter circuit and the like. When the digital audio data is supplied, the audio output circuit 26 D / A converts the digital audio data into analog audio signals L and R. The signals L and R are supplied to the left and right channel speakers 28L and 28R through the output amplifier 27.

  Further, a buffer memory 31 and a display control circuit 32 are connected to the bus line 29, and an LCD 33, for example, is connected to the display control circuit 32 as a display means so that various types of information can be displayed. Yes.

  Reference numeral 41 denotes a control circuit for controlling the operation of the entire apparatus, which is constituted by, for example, a microcomputer and is connected to the bus line 29. In the control circuit 41, for example, a routine 100 shown in FIG. 2 is prepared as a part of a program executed by the CPU. Although details of this routine 100 will be described later, FIG. 2 shows only the portions related to the present invention.

  Further, the control circuit 41 is connected with an operation key 42 constituted by a non-lock type push switch as means for a user to perform various input operations.

  In such a configuration, when the microcomputer of the control circuit 41 executes the routine 100, [normal playback of CD] and [recording from CD to HDD] are executed as follows.

[Normal CD playback]
This is a case where the CD 10 is reproduced as it is and the sound output is obtained as in a general CD player.

  That is, when the CD 10 is set in the CD drive device 21, the processing of the CPU of the control circuit 41 starts from step 101 of the routine 100. Next, in step 102, the TOC data is read from the CD 10 by the CD drive device 21. The read TOC data is supplied from the CD drive device 21 to the control circuit 41 through the bus line 29 and stored, and then in step 103, it waits for key input.

  In this case, since it is [normal reproduction of CD], when the reproduction key of the keys 42 is pressed, the process proceeds from step 103 to step 111, and the key input in step 103 is determined.

  In this case, since the reproduction key has been pressed, the process proceeds from step 111 to step 112. In this step 112, the normal reproduction process of the CD 10 is executed.

  That is, digital audio data is reproduced from the CD 10 by the CD drive device 21, this digital audio data is supplied from the CD drive device 21 to the audio output circuit 26 through the bus line 29, and is D / A converted into audio signals L and R, The audio signals L and R are supplied to the speakers 28L and 28R through the amplifier 27.

  In this case, the track reproduced from the CD 10 is in accordance with the user's designation. At that time, the TOC data stored in the control circuit 41 is referred to in step 102. Further, at the time of this reproduction, the track number and elapsed time of the track being reproduced are displayed on the LCD 33.

  When the reproduction of all the tracks designated by the user is finished, the process proceeds to step 119, and this routine 100 is finished.

  Therefore, the apparatus of FIG. 1 can reproduce the CD 10 in the same manner as a general CD player.

[Recording from CD to HDD]
This is a case where the digital audio data in the CD 10 is compressed and stored or written in the HDD 24.

  That is, when the CD 10 is set in the CD drive device 21, the TOC data is read from the CD 10 and stored in the control circuit 41 as described above, and then in step 103, the process waits for key input.

  In this case, since [record from CD to HDD], when the copy key of the key 42 is pressed, the process proceeds from step 103 to step 111, and the key input in step 103 is determined.

  Then, in this case, since the copy key has been pressed, the process proceeds from step 111 to step 121. In this step 121, the TOC data read out in step 102 is used as a search term and the “TOC” in the management table 24T. Data in the “data” cell is searched.

  Next, in step 122, when the search result of step 121 is determined and the TOC data read out in step 102 is not in the “TOC data” cell of the management table 24T, the process proceeds from step 122 to step 123. In step 123, the CD 10 is copied to the HDD 24.

  That is, digital audio data is reproduced from the CD 10 by the CD drive device 21, and the digital audio data is once written from the CD drive device 21 to the memory 22 through the bus line 29 and read from the memory 22 at a predetermined timing. The read digital audio data is supplied to the encoder circuit 23 through the bus line 29 and is compressed by ATRAC processing, and the compressed digital audio data is supplied to the HDD 24 through the bus line 29. Thus, the digital audio data of the CD 10 is written into the HDD 24 in a compressed state.

  At this time, the copied CD 10 and track information (tracks in the CD 10) are registered in the management table 24T of the HDD 24. That is, if the copy of the CD 10 is the nth (n = 1 to 100), control is performed by reading from the CD 10 into the “TOC data” cell in the column of the CD number #n of the management table 24T in step 102. The TOC data stored in the circuit 41 is written. Further, the number of tracks of the CD 10 is written in the “track number” cell in the column of the CD number #n.

  Further, the write start position and the write end position when the digital audio data of the CD 10 is written to the HDD 24 are “start position and end position of the track 1” to “track 1” in the column of the CD number #n for each track of the CD 10. Of the cells of “the start position and end position of the last track”, the data is written in the corresponding cell.

  When the character information about the CD 10 or the track is input from the key 42, the character data is once stored in the memory 31, and when the copying of the CD 10 is finished, it is read from the memory 31 and the CD number # in the management table 24T. It is written in the “title” cell in the n column. When the CD 10 is a CD text, character information added to the CD 10 is also written.

  Thus, when the contents of the CD 10 are written to the HDD 24, the management table 24T is also updated accordingly.

  When the above process is completed, the process proceeds from step 123 to step 119, and this routine 100 is terminated.

  Therefore, when a certain CD 10 has not been copied to the HDD 24, the CD 10 is copied to the HDD 24. At this time, information for specifying the CD 10 is also registered in the management table 24T of the HDD 24.

  On the other hand, when the TOC data read in step 102 is in the “TOC data” cell of the management table 24T in step 122, the process proceeds from step 122 to step 131. Predetermined data is supplied to the display control circuit 32 through the bus line 29. As a result, as shown in FIG. 4, for example, a warning message indicating that the CD 10 to be copied has already been copied to the HDD 24 is displayed on the LCD 33. A character string is displayed.

  Subsequently, the process proceeds to step 132 where the CD 10 is ejected from the CD drive device 21 in accordance with an instruction from the control circuit 41, and then the routine 100 is terminated at step 119.

[Playback from HDD]
This is a case where the contents of the CD copied to the HDD 24 are reproduced. Note that the processing routine for this reproduction is not shown.

  That is, when playback from the HDD 24 is instructed by the key 42, data is read from the “title” cell in the registered data column in the data column # 1 to # 100 of the management table 24T. And the data of the corresponding CD number #n are supplied to the display control circuit 32. As a result, a correspondence table between the CD number #n and the “title” is displayed on the LCD 33.

  Therefore, when the desired CD number #m is input by operating the key 42, the data written in the cells from the “number of tracks” to “title” cells in the column of the CD number #m in the management table 24T. Is read and stored in the control circuit 41 once.

  Thereafter, by using the data stored in the control circuit 41 in the same manner as the TOC data written on the CD, digital audio data corresponding to the content of the CD with the CD number #m is obtained from the HDD 24. Read out and output as sound.

  In this case, when the digital audio data is read from the HDD 24, the digital audio data is buffered by the memory 22 and then decompressed to the original digital audio data supplied to the decoder circuit 25, and the decompressed digital audio data is stored in the memory. The signal is buffered by 22 and supplied to the audio output circuit 26. Therefore, the playback sound of the digital audio data read from the HDD 24 is output from the speakers 28L and 28R.

  Also during playback from the HDD 24, the track number and elapsed time of the track being played (CD track) are displayed on the LCD 33.

[Summary]
As described above, in the reproducing apparatus of FIG. 1, when copying the contents of the CD 10 to the HDD 24, it is checked whether or not the CD 10 has already been copied by referring to the management table 24T. Copying is executed only when there is not. Therefore, it is possible to prevent the same CD from being accidentally copied twice, and for example, the capacity of the HDD 24 is not wasted.

  In addition, at that time, it is not necessary for the user to manage whether or not a certain CD has been copied to the HDD 24, and double copying can be automatically prevented.

  In addition, if it is not known whether or not a certain CD has already been copied to the HDD 24, it is only necessary to set the CD in the CD drive device 21 and perform a copy key operation. For example, if copying to the HDD 24 is executed and copying has been completed, this is displayed, and at this time, double copying is not executed.

  In addition, for this purpose, it is only necessary to prepare the management table 24T in the HDD 24, and no special hardware is required.

  Furthermore, since arbitrary character information can be written in the “title” cell of the management table 24T, when the CD is copied to the HDD 24, a unique title or the like can be given to the copy.

[Others]
In the routine 100 of FIG. 5, when the CD 10 has already been copied to the HDD 24, the step 133 is executed following the step 132, and the contents of the CD 10 to be copied are reproduced from the HDD 24.

  Therefore, in this case, when a CD that has already been copied to the HDD 24 is to be copied again, this is noted by the display on the LCD 33 and can also be confirmed by the reproduced sound.

  In the above description, the information written in the “title” cell of the management table 24T can be written together at another opportunity after copying to the HDD 24. In this case, the copying of the contents of the CD is completed. Sometimes it is better to write the date and time of copying by default.

  Further, the information written in the “title” cell can be written in a nonvolatile memory. Further, when the CD 10 is reproduced and the contents are copied to the HDD 24, the reproduction speed can be made higher than the standard. Further, the management table 24T only needs to indicate the correspondence between the TOC data and the digital audio data written in the HDD 24.

List of abbreviations used in this specification ATRAC: Adaptive TRansform Acoustic Coding (registered trademark)
CD: Compact Disc
CPU: Central Processing Unit
D / A: Digital to Analog
HDD: Hard Disk Drive
LCD: Liquid Crystal Display
TOC: Table Of Contents

It is a systematic diagram showing one embodiment of the present invention. It is a flowchart which shows one form of this invention. It is a management table which shows one form of this invention. It is a figure which shows the example of a display in this invention. It is a flowchart which shows the other form of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... CD, 21 ... CD drive device, 22 ... Buffer memory, 23 ... Encoder circuit, 24 ... HDD, 24T ... Management table, 25 ... Decoder circuit, 26 ... Audio output circuit, 27 ... Amplifier, 28L and 28R ... Speaker DESCRIPTION OF SYMBOLS 29 ... Bus line, 31 ... Buffer memory, 32 ... Display control circuit, 33 ... LCD, 41 ... Control circuit, 42 ... Operation key, 100 ... Processing routine

Claims (14)

The digital audio data and the TOC reproduced from the CD on which the digital audio data and the TOC for managing the digital audio data are recorded are recorded on the HDD , and the data generated from the TOC is already stored in the HDD. Recording means for recording in a management table for managing data generated from the TOC of a recorded CD ;
When the reproduced digital audio data is recorded on the HDD by the recording means , data generated from the TOC , data generated from the TOC of a CD already recorded on the management table, and based on, it has a control means for controlling permission or prohibition of recording the digital audio data to be the reproduction,
A recording apparatus that controls to update the management table based on data generated from a TOC of a specific CD when recording of digital audio data from the specific CD is permitted . The recording apparatus according to claim 1,
The control means includes
A recording apparatus for prohibiting recording of the reproduced digital audio data by the recording means when data generated from the TOC is recorded in the management table. The recording apparatus according to claim 1,
The control means includes
A recording apparatus that warns that the reproduced digital audio data has already been recorded by the recording means when data generated from the TOC is recorded in the management table. The recording apparatus according to claim 1,
The control means includes
A recording apparatus that permits recording of the reproduced digital audio data by the recording means when data generated from the TOC is not recorded in the management table. The recording apparatus according to claim 1 ,
Compression means for compressing the digital audio data;
When recording the digital audio data reproduced by the reproducing means, the reproduced digital audio data is compressed by the compressing means,
A recording apparatus for recording the digital audio data resulting from the compression . The recording apparatus according to claim 1,
The recording apparatus , wherein the management table includes at least one of a track number, a track start position, a track end position, and a CD title . The recording apparatus according to claim 3 ,
The control means includes
A recording device for displaying information including the title of the CD on the display means to warn that the CD has already been recorded . The recording apparatus according to claim 1 ,
The control means includes
A recording apparatus configured to eject the CD when data generated from the TOC is recorded in the management table . When the digital audio data obtained by reproducing the digital audio data from the CD on which the digital audio data and the TOC for managing the digital audio data are recorded on the HDD, the TOC is reproduced from the CD and stored in the TOC. Based data,
  The management table for managing the data generated from the TOC of the already recorded CD in the HDD is searched using the generated data.
  Based on the search result, permission / prohibition of recording of the reproduced digital audio data to the HDD is controlled.
  When recording of digital audio data from a specific CD is permitted, the management table is updated based on data generated from the TOC of the specific CD.
  Recording method. The recording method according to claim 9,
A recording method for prohibiting recording of the digital audio data on the HDD when the search result indicates that the generated data is recorded in the management table . The recording method according to claim 9 ,
A recording method that warns that the digital audio data is already recorded in the HDD when the search result indicates that the generated data is recorded in the management table. The recording method according to claim 9 ,
A recording method for permitting recording of the digital audio data in the HDD when the search result indicates that the generated data is not recorded in the management table. The recording method according to claim 9 ,
A recording method in which the CD is ejected when data generated from the TOC is recorded in the management table . The recording apparatus according to claim 1,
  The control means includes
    When data generated from the TOC is recorded in the management table, the digital audio data to be recorded is reproduced from the HDD.
  Recording device.

Images