KR20070030673A - Data recording method, data recording apparatus, and data recording program - Google Patents

Abstract

According to the present invention, a first recording step of reading audio data stored in an external storage medium and recording the temporary data in accordance with an audio data input request, and the first frame of the audio data recorded in the temporary storage medium are forward. And a second recording step of recording the audio data recorded on the temporary storage medium in the storage medium according to the detection result obtained in the detection step. In this way, an increase in processing load during continuous reproduction of audio data can be avoided.

Audio data, processing load, MP3, frames.

Description

Data recording method, data recording device and data recording program {DATA RECORDING METHOD, DATA RECORDING APPARATUS, AND DATA RECORDING PROGRAM}

1 is a block diagram showing an outline of a data recording apparatus according to the present invention;

2 is a block diagram showing an embodiment of a circuit configuration by a functional block of a content recording / reproducing apparatus according to the present invention;

3 is a block diagram showing one embodiment of a circuit configuration by a hardware block of the content recording and reproducing apparatus according to the present invention;

4 is a schematic diagram showing a software configuration of a content recording and reproducing apparatus;

5 is a schematic diagram showing the structure of a single track MP3 file;

6 is a schematic diagram for explaining the storage (1) of divided coded music data for a frame;

7 is a schematic diagram for explaining the storage 2 of divided coded music data for a frame;

8 is a schematic diagram for providing a description of split editing for an MP3 file;

9 is a schematic diagram for providing an additional explanation of additional data for an MP3 file;

10 is a schematic diagram provided in the description of an MP3 file containing negative data;

11 is a schematic diagram for explaining an error of a frame size of a trailing frame;

12 is a block diagram for explaining the recording of an MP3 file;

13 is a flowchart showing a file input recording processing procedure 1;

14 is a flowchart showing a file input recording processing procedure (2);

15 is a flowchart showing the file checking processing procedure.

 The present invention relates to a data recording method, a data recording apparatus and a data recording program, and is suitable for application to, for example, a content recording and reproducing apparatus for recording and reproducing music contents.

Conventional audio compressed data reproduction method has a cluster of trailing audio compression data in the first half and a second audio compression data leading when splitting audio compressed data in which data corresponding to the header exists in front of a frame header. You are editing a duplicate of a cluster. In the audio compression data reproducing method, when two audio compressed data are continuously reproduced, the cluster head predetermined data at the end of the audio compressed data to be reproduced first is compared with the cluster head predetermined data at the head of the audio compressed data to be reproduced later. When the head predetermined data match, the head of the audio compressed data to be reproduced later is reproduced (see Patent Document 1, for example).

[Patent Document 1] Japanese Unexamined Patent Publication No. 2002-108397 (Second page, Third page, Figure 1)

By the way, in this audio compressed data reproduction method, when two audio compressed data are continuously reproduced, in addition to the decoding process for these audio compressed data, as described above, it is determined whether or not to reproduce the head of the subsequent audio compressed data. The process for this is also performed. For this reason, this audio compressed data reproduction method has a problem that the processing load is remarkably increased during continuous reproduction of the audio compressed data.

 SUMMARY OF THE INVENTION The present invention has been made in consideration of the above points, and an object of the present invention is to propose a data recording method, a data recording apparatus, and a data recording program which can avoid an increase in processing load during continuous reproduction of audio data.

In order to solve the above problems, according to the present invention, in accordance with an audio data input request, audio data stored in an external storage medium is read, and the read audio data is recorded in a temporary storage medium and recorded in such a temporary storage medium. It is detected whether the first frame of the audio data refers to the frame ahead, and according to the detection result, the audio data recorded on the temporary storage medium is recorded on the storage medium.

Therefore, in the present invention, when recording the audio data to the storage medium, it is possible to record audio data which can be reproduced as it is without performing any special processing in subsequent continuous reproduction.

According to the present invention, in response to an audio data input request, audio data stored in an external storage medium is read out, the read audio data is recorded in a temporary storage medium, and the head frame of the audio data recorded in the temporary storage medium is recorded. When the audio data is recorded on the storage medium by detecting whether the front frame is referenced or not, and recording the audio data recorded on the temporary storage medium on the storage medium according to the detection result. Data recording method and data recording apparatus capable of recording audio data that can be reproduced as is without performing any special processing in reproduction, thereby avoiding an increase in processing load during continuous reproduction of audio data. And a data recording program can be realized.

 EMBODIMENT OF THE INVENTION Hereinafter, one Embodiment of this invention is described in detail with reference to drawings.

(1) Outline of Embodiment

In Fig. 1, reference numeral 100 denotes a data recording apparatus according to the present invention. In the data recording apparatus 100, the first recording unit 101 reads audio data stored in the external storage medium 102 in accordance with an audio data input request, and simultaneously stores the read audio data. Record at 103. In the data recording apparatus 100, the detection unit 104 detects whether the first frame of the audio data recorded in the temporary storage medium 103 by the first recording unit 101 refers to the frame ahead. do. In the data recording apparatus 100, the second recording unit 105 records the audio data recorded in the temporary storage medium 103 in the storage medium 106 in accordance with the detection result by the detection unit 104. In this regard, the storage medium 106 may be built in the data recording apparatus 100 or may be provided outside the data recording apparatus 100.

(2) Embodiment

In Fig. 2, reference numeral 1 denotes a functional configuration of a content recording and reproducing apparatus that records and reproduces music contents as a whole, and the temporary storage section 4 stores various programs read out from the storage section 3 by the control section 2. It is designed to collectively control the whole, and to perform various processes by expanding and executing the program.

That is, when the control part 2 recognizes that the acquisition operation of the music content distributed by the content distribution server (not shown) on the network NT is performed by the user via the operation part 5, for example, A request signal for requesting distribution is sent to the content distribution server on the network NT via the communication unit 6.

When the content distribution server receives the request signal from the content recording and reproducing apparatus 1, the charging processing for charging the user of the content recording and reproducing apparatus 1 according to the distribution of the requested music content accordingly. And recording the encrypted music data (hereinafter referred to as encrypted music data) corresponding to the requested music content and right information indicating the right to use this music content via network NT. To the device 1. In this regard, the right information in this case includes, for example, the use of the content indicating the original data of the decryption key (so-called the kind of decryption key) that decrypts the encrypted music data, the number of times that the music content can be played, the number of times that can be transmitted, and the like. The conditions and the content usage status indicating the number of times that the music content was actually played, the number of times that the music content was transmitted, and the like are written.

When the control unit 2 of the content recording and reproducing apparatus 1 receives the encrypted music data and its right information transmitted from the content distribution server through the communication unit 6, they are driven and controlled by the built-in recording medium drive unit 7. It records on the built-in recording medium 8.

In this way, the content recording and reproducing apparatus 1 can be configured to acquire (download) the music content from the content distribution server on the network NT and to record the music content on the internal recording medium 8.

Subsequently, the control unit 2 recognizes, via the operation unit 5, that the playback instruction for the music content recorded on the built-in recording medium 8 has been performed by the user, thereby encrypting the music data corresponding to the music content. And the right information are read from the internal recording medium 8, the right information is sent to the right processing unit 9, and the encrypted music data is sent to the music processing unit 10.

If the right processing unit 9 confirms whether the right information transmitted from the built-in recording medium 8 is legitimate and can confirm that it is legitimate, then the use of the encrypted music data corresponding to the right information (in this case, reproduction) Permit. Then, the right processing unit 9 generates a decryption key of the encrypted music data based on this right information, and passes the decryption key to the music processing unit 10. Here, the right processing unit 9 and the music processing unit 10 are connected by a dedicated path, so that the decryption key can be prevented from being illegally acquired from the outside by sending and receiving a decryption key through this dedicated path. .

The music processing unit 10 obtains the music data by decoding the encrypted music data transmitted from the built-in recording medium 8 with the decoding key received from the right processing unit 9, and furthermore, the music data is decoded and digital-analogized. The music signal is obtained by sequentially performing the conversion process, the amplification process, and the like, and the music signal is sent to the external music output unit 11 to output music based on the music signal from the music output unit 11.

In this way, the content recording and reproducing apparatus 1 can be made to reproduce the music content recorded on the internal recording medium 8.

In addition, the control unit 2 of the content recording and reproducing apparatus 1, according to the operation of the operation unit 5 by the user, records the music data recorded on the external recording medium 13 driven and controlled by the external recording medium driving unit 12. The music signal is obtained by sequentially performing decoding processing, digital analog conversion processing, amplification processing, and the like on the read music data, and the music output section 11 performs music based on the music signal. Output from

Moreover, the control part 2 reads the music data recorded in the external device 15 connected via the interface part 14 according to the operation of the operation part 5 by a user, and, with respect to this read music data, The music processing section 10 sequentially performs decode processing, digital analog conversion processing, amplification processing, and the like to obtain a music signal, and outputs music based on the music signal from the music output section 11.

Further, the control unit 2 performs analog-to-digital conversion processing to the music processing unit 10 with respect to a music signal input from the external music input unit 16 to the music processing unit 10 according to the operation of the operation unit 5 by the user. The music signal is obtained by sequentially performing the echoizing process, the digital analog conversion process, the amplifying process, and the like, and the music based on the music signal is output from the music output unit 11.

In this way, the content recording and reproducing apparatus 1 can also be configured to play music content recorded on the external recording medium 13 or the external device 15 or music content input from the music input unit 16. In this regard, when the music content recorded on the external recording medium 13 or the external device 15 is encrypted music data associated with the right information, such as the music content obtained from the above-described content distribution server, the music content is stored. What is necessary is just to reproduce | play like the music content acquired from the content distribution server and recorded in the built-in recording medium 8.

Moreover, the control part 2 reads the music data recorded in the external recording medium 13 or the external apparatus 15 according to the operation of the operation part 5 by a user, and the music processing part with respect to this read music data Encoding processing is performed at (10), and at this time, encrypted music data is obtained by encrypting with an encryption key given from the right processing unit 9, and this encrypted music data and right information generated by the right processing unit 9 are then obtained. Correspondingly, recording is performed in the internal recording medium 8.

Furthermore, the control unit 2 performs analog digital conversion processing and input to the music processing unit 10 with respect to the music signal input from the music input unit 16 to the music processing unit 10 in accordance with the operation of the operation unit 5 by the user. Code processing or the like is sequentially performed, and at this time, encrypted music data is obtained by encrypting with an encryption key given from the right processing unit 9, and this encrypted music data is correlated with the right information generated at the right processing unit 9 at this time, for internal recording. Record on the medium (8).

In this way, the content recording and reproducing apparatus 1 can record the music content recorded on the external recording medium 13 or the external device 15 or the music content input from the music input unit 16 on the internal recording medium 8. It can also be made to be. In this connection, each of the encryption of the music data to be performed at the time of recording and the correspondence of the right information may be performed as necessary (for example, according to the operation of the operation unit 5 by the user), for example, encryption. And music data read from the external recording medium 13 or the external device 15 without change of the right information, can be recorded in the internal recording medium 8 as it is, and the music signal input from the music input unit 16. In contrast, the music processing unit 10 sequentially performs analog-digital conversion processing, encoding processing, and the like to obtain music data, and the music data can be recorded on the internal recording medium 8 as it is.

Moreover, the control part 2 reads the encrypted music data and its right information recorded on the built-in recording medium 8 according to the operation of the operation part 5 by a user, or reads the music data, and records these externally. Recording to the medium 13 or the external device 15 is performed. In this way, the content recording and reproducing apparatus 1 can also be made to transmit the music content recorded on the internal recording medium 8 to the outside.

In addition, the control unit 2 displays the display data based on the execution result of the various programs read from the storage unit 3 (for example, acquiring, reproducing, recording, and transferring music contents). Send to The display processing unit 17 displays a screen based on the display data transmitted from the control unit 2 on the external display unit 18. In this way, the content recording and reproducing apparatus 1 can also be configured to allow the user to visually recognize various screens related to the acquisition, reproduction, recording, transmission, etc. of the music content through the display unit 18.

The music output unit 11, the external device 15, the music input unit 16, and the display unit 18 may be externally connected to the content recording / reproducing apparatus 1 via a predetermined cable, and the content recording / reproducing apparatus It may be directly attached to the casing of (1) and connected internally.

Next, the case where the above-described configuration of the content recording and reproducing apparatus 1 is realized with a specific hardware configuration will be described with reference to FIG. 3. In this content recording and reproducing apparatus 1, a CPU 20 (Central Processing Unit) and each hardware are connected via a bus 21, and the CPU 20 reads from an EEPROM 22 (Electronically Erasable and Programmable Read Only Memory). A variety of programs can be implemented in the RAM (23: Random Access Memory) and executed to control the whole and perform various processes.

In other words, the CPU 20 obtains music content that is transmitted from, for example, a content distribution server (not shown) on the network NT via an operation key 24 set to a casing of the content recording / reproducing apparatus 1 or the like. When it recognizes that the information has been performed, the request signal for requesting the distribution of the music content is transmitted to the content distribution server on the network NT through the network interface 25.

When the content distribution server receives the request signal from the content recording and reproducing apparatus 1, the content distribution server performs a charging process for charging the user of the content recording and reproducing apparatus 1 according to the distribution of the requested music content. At the same time, the encrypted music data corresponding to the requested music content and right information indicating the right to use the music content are transmitted to the content recording and reproducing apparatus 1 via the network NT. In this regard, the right information in this case includes, for example, the use of the content indicating the original data of the decryption key (so-called the kind of decryption key) that decrypts the encrypted music data, the number of times that the music content can be played, the number of times that can be transmitted, and the like. The conditions and the content usage status indicating the number of times that the music content was actually played, the number of times that the music content was transmitted, and the like are written.

When the CPU 20 of the content recording and reproducing apparatus 1 receives the encrypted music data and its right information transmitted from the content distribution server through the network interface 25, they record these on the hard disk drive 26.

In this way, the content recording and reproducing apparatus 1 can be configured to acquire (download) the music content from the content distribution server on the network NT and to record the music content on the hard disk drive 26.

Subsequently, when the CPU 20 recognizes that the playback instruction for the music content recorded on the hard disk drive 26 has been performed by the user through the operation key 24, the encrypted music corresponding to the music content is thereby followed. Data and its right information are read from the hard disk driver 26, and these are sent to the right processing and music processing module 27.

The right processing and music processing module 27 is a multichip module concealed from the outside of the module, is connected to the bus 21 outside the module via the local bridge 27A, and is connected to the local bridge 27A. It is connected to an analog processing circuit 28 outside the module via (27B: Digital Signal Processor). Then, the right processing and music processing module 27, when the encrypted firmware for the DSP 27B recorded on the hard disk drive 26 is read out and supplied by the CPU 20, the local bridge 27A. And the DSP 27B execute the firmware temporarily stored in the RAM 27C and temporarily stored in the RAM 27C, thereby processing the rights processing unit 9 of the content recording and reproducing apparatus 1 described above. , The digital processing of the music processing unit 10 may be performed. In addition, the right processing and music processing module 27 has an EEPROM 27D accessible to the DSP 27B, and can be configured to store hidden information or the like that the EEPROM 27D wants to conceal from the outside of the module. have.

That is, the right processing and music processing module 27 inputs the encrypted music data transmitted from the hard disk drive 26 and the right information to the DSP 27B via the local bridge 27A. The DSP 27B confirms whether the right information is legitimate and, if it can confirm that it is right, permits the use (in this case, reproduction) of the encrypted music data transmitted with the right information. The DSP 27B generates the decryption key of the encrypted music data based on this right information, obtains the music data by decoding the encrypted music data with this decryption key, and further decodes the music data. After digital processing is performed, the digitally processed music data is sent to the analog processing circuit 28.

The analog processing circuit 28 obtains a music signal by performing analog processing such as digital analog conversion processing and amplification processing on the digitally processed music data, sends the music signal to an external speaker 29, 29) music based on a music signal is output.

In this way, the content recording and reproducing apparatus 1 can be made to reproduce the music content recorded on the hard disk drive 26.

In addition, the CPU 20 of the content recording and reproducing apparatus 1 stores the music data recorded on the CD 31 loaded in the CD (Compact Disc) drive 30 in accordance with the operation of the operation key 24 by the user. The digital music, such as decoding processing, is performed by the right processing and music processing module 27 on the read music data, and then analog processing, such as digital analog conversion processing and amplification processing, by the analog processing circuit 28. By obtaining a music signal, music based on the music signal is output from the speaker 29.

Further, the CPU 20 reads music data recorded in the USB device 33 connected through the USB (Universal Serial Bus) interface 32 in accordance with the operation of the operation key 24 by the user, The read music data is subjected to digital processing such as decoding processing by the right processing and music processing module 27, and furthermore, the analog processing circuit 28 performs analog processing such as digital analog conversion processing and amplification processing. A signal is obtained and music based on this music signal is output from the speaker 29.

In addition, the CPU 20 is an analog processing circuit for the music signal input to the analog processing circuit 28 from the tuner 34 or the external input terminal 35 in response to the operation of the operation key 24 by the user. After performing analog processing such as analog-to-digital conversion processing at 28, digital processing such as echoizing processing is performed at the right processing and music processing module 27, and further, analog-to-digital conversion processing at the analog processing circuit 28 thereafter. By performing analog processing of the music signal, a music signal is obtained, and music based on the music signal is output from the speaker 29.

In this way, the content recording and reproducing apparatus 1 can be made to reproduce the music content recorded on the CD 31 or the USB device 33 or the music content input from the tuner 34 or the external input terminal 35. have. In this regard, when the music content recorded on the CD 31 or the USB device 33 is encrypted music data that can be associated with the right information, such as the music content obtained from the above-described content distribution server, this music content May be reproduced in the same manner as the music content obtained from the content distribution server and recorded on the hard disk drive 26.

Furthermore, the CPU 20 reads the music data recorded on the CD 31 or the USB device 33 according to the operation of the operation key 24 by the user, and the right of the read music data Encoding processing is performed by the processing and music processing module 27, and at this time, encrypted music data is obtained by encrypting with an encryption key generated by the rights processing and music processing module 27, and this encrypted music data and right processing And the right information generated by the music processing module 27 are recorded in the hard disk drive 26 in correspondence.

In addition, the CPU 20 is an analog processing circuit for the music signal input to the analog processing circuit 28 from the tuner 34 or the external input terminal 35 in response to the operation of the operation key 24 by the user. After performing analog processing such as analog-to-digital conversion processing at 28, the digital processing such as encoding processing is performed at the right processing and music processing module 27, and at this time, the right processing and music processing module 27 is generated. The encrypted music data is obtained by encrypting with the encryption key, and the encrypted music data and the right information generated at this time by the rights processing and music processing module 27 are corresponded and recorded on the hard disk drive 26.

In this manner, the content recording and reproducing apparatus 1 stores the music content recorded on the CD 31 or the USB device 33 or the music content input from the tuner 34 or the external input terminal 35. Can also be recorded. In this connection, each of the encryption of the music data to be performed at the time of recording and the correspondence of the right information may be performed as necessary (for example, in accordance with the operation of the operation key 24 by the user). The music data read from the CD 31 or the USB device 33 can be recorded in the hard disk drive 26 as it is without performing encryption and right information correspondence, or the tuner 34 or the external input terminal 35 can be used. Analog data and digital processing are sequentially performed on the music signal input from the analog processing circuit 28 and the right processing and music processing module 27 to obtain music data, and the music data is stored as it is. You can also write to

Further, the CPU 20 reads the encrypted music data and its right information recorded on the hard disk drive 26 or the music data in accordance with the operation of the operation key 24 by the user, and reads the music data. ) And the USB device 33. In this way, the content recording and reproducing apparatus 1 can also be made to transmit the music content recorded on the hard disk drive 26 to the outside.

In addition, the CPU 20 supplies the display controller 36 with display data based on execution results of various programs read from the EEPROM 22 (for example, acquisition, reproduction, recording, and transfer of music contents). send. The display controller 36 displays on the external display 37 a screen based on the display data transmitted from the CPU 20. In this manner, the content recording and reproducing apparatus 1 can also be configured to allow the user to visually recognize various screens related to the acquisition, reproduction, recording, transmission, and the like of the music content through the display 37.

In addition, the speaker 29, the USB device 33, the tuner 34, the external input terminal 35, and the display 37 may be externally connected to the content recording / reproducing apparatus 1 via a predetermined cable, It may be directly attached to the casing of the content recording and reproducing apparatus 1 and connected internally.

In this regard, the CPU 20 of the content recording and reproducing apparatus 1 corresponds to the above-described control unit 2 (Fig. 2), the EEPROM 22 corresponds to the storage unit 3, and the RAM 23 Corresponds to the temporary storage unit 4, the operation key 24 corresponds to the operation unit 5, the network interface 25 corresponds to the communication unit 6, the hard disk drive 26 is a built-in recording medium drive unit ( 7) and the internal recording medium 8, the rights processing and music processing module 27 and the analog processing circuit 28 correspond to the rights processing unit 9 and the music processing unit 10, and the CD drive 30 Corresponds to the external recording medium driver 12, the USB interface 32 corresponds to the interface unit 14, and the display controller 36 corresponds to the display processor 17. FIG.

Next, the software installed in the content recording / reproducing apparatus 1 having the hardware configuration described above with reference to FIG. 3 will be described with reference to FIG. Such software is hierarchically related, and the user interface 40 is located at the top. The user interface 40 displays various information, such as a list of music data, on the display 37, and provides various commands such as the start of playback input by the user via the operation key 24 and the selection of desired music content. It is to recognize.

The middleware 41 is located under the user interface 40. The middleware 41 acquires, reproduces, and records the above-described music content with respect to the rights processing and music processing module 27 and other hardware 42 (hard disk drive 26, CD drive 30, etc.). It is for generating a process execution request for executing various processes such as transfer and managing various databases built on the hard disk drive 26. In addition, the middleware 41 displays various types of information such as a list of music data recorded on the CD 31 loaded on the CD drive 30, the USB device 33, the hard disk drive 26, or the like. It is also for generating for display of (37) or the like.

The plug-in 43 is located below the middleware 41. The plug-in 43 is configured to generate processing execution instruction information for executing various processes to the right processing and music processing module 27 or other hardware 42 in accordance with a processing execution request generated by the middleware 41. will be. The plug-in 43 is also for executing input recording processing in which the content recording and reproducing apparatus 1 acquires music content from the outside and writes it to the hard disk drive 26 as it is. Under the plug-in 43, a library 44 for rights processing and music processing modules is located. The right processing and music processing module library 44 is configured to generate decoding keys that use the right information for the right processing and music processing module 27 among various processing execution instruction information generated by the plug-in 43. Only the processing execution instruction information which executes digital processing such as right processing or decode processing and encoding processing using music contents is converted into processing execution instruction information of a predetermined format which can be interpreted by the rights processing and music processing module 27. It is to.

An OS 45 (Operating System) is located below the rights processing and music processing module library 44, and the plug-in 43, the rights processing and music processing module library 44, and the middleware 41 are located. The user interface 40 is executed on this OS 45. The device driver 46 is located below the OS 45. The device driver 46 is for the OS 45 to recognize various functions of the right processing and music processing module 27 and the other hardware 42. As a result, the OS 45 sends various processing execution instruction information generated and converted by the plug-in 43 or the library for processing rights and the music processing module 44 to the rights processing and music processing module 27 or other. To the hardware 42.

In addition to the above configuration, the USB device 33 connected to the content recording and reproducing apparatus 1 includes music data corresponding to music content for each piece of music (hereinafter, referred to as one track), for example, MPEG (Moving). Picture Experts Group) compression compression is performed using a compression coding method called an Audio Layer 3 format or an MPEG2 Audio Layer 3 format (hereinafter, these formats are referred to as MP3 formats). (Hereinafter referred to as MP3 file) can be made. The content recording / reproducing apparatus 1 can read out and input the MP3 file for each track from the USB device 33 and record the input MP3 file directly on the hard disk drive 26.

Here, in the MP3 format, the MP3 file is prescribed to be processed in a processing unit called a frame. As shown in Fig. 5, the MP3 file D1 of one track is composed of, for example, a plurality of consecutive frames F1 to Fn. In this case, each of the frames F1 to Fn has frame headers H1 to Hn, cyclic redundancy check (CRC) code storage units C1 to Cn, side information storage units S1 to Sn, main data storage units MD1 to MDn, and additional information, respectively, from the beginning. The storage units AD1 to ADn are configured in this order.

In the main data storage sections MD1 to MDn, one track of coded music data is appropriately divided, and the resultant divided data (hereinafter, specifically referred to as split coded music data) is stored. . In the frame headers H1 to Hn, various pieces of information such as header discrimination information capable of discriminating the corresponding frame headers H1 to Hn and size information indicating the frame size of the frames F1 to Fn are stored as header data. Furthermore, CRC codes are stored in the CRC code storage units C1 to Cn for error correction of the divided coded music data stored in the main data storage units MD1 to MDn. Further, in the additional information storage units AD1 to ADn, various types of information used for decoding processing of the divided coded music data stored in the main data storage units MD1 to MDn and the like are stored as additional information.

By the way, in the MP3 format, when one track of encoded music data is divided into a plurality of divided coded music data, one divided coded music data is allocated to each of the frames F1 to Fn for storage and the main data storage unit is allocated. It is prescribed to store in MD1 to MDn. As shown in Fig. 6, in the MP3 format, for example, a frame in which one divided coded music data d2 allocated to the frame F2 is processed as it is, before the frame F2 in which the divided coded music data d2 is originally stored. It is prescribed to store in the main data storage unit MD1 of F1. In addition, at least a portion (d31, d32: hereinafter referred to as subdivided music data) of one piece of divided coded music data d3 is processed in time before the frame F3 in which the divided coded music data d3 is originally stored (that is, the front side). Is stored in the main data storage units MD1 to MD2 of the frames F1 and F2.

As a result, the MP3 file D1 generated in accordance with such a regulation includes one frame F1 or segmented music stored in the main data storage unit MD1 by two divided coded music data d1 and d2 and one segmented music data d31. Various configurations can be taken such that only the data d32 has one frame F2 stored in the main data storage MD2 or one frame F3 stored in the main data storage MD3 together with the two subdivided music data d33 and d41.

As shown in FIG. 7, in the MP3 format, storage position notification information called "main_data__egin" is stored in the side information storage units S1 to S3 of the frames F1 to F3, and the frame is stored according to the storage position notification information. The storage positions at the head of the divided coded music data d1 to d3, which should be originally stored (i.e., allocated for storage), are defined in F1 to F3 as shown. In this case, in the MP3 format, when the divided coded music data d1 originally to be stored in the frame F1 is stored as it is, the value of the storage position notification information is, for example, "0", and is the head of the divided coded music data d1. Indicates that the storage position of the frame is the frame F1. In the MP3 format, when the divided coded music data d2 and d3, which are to be originally stored in the frames F2 to F3, are stored as they are (i.e., remain as the divided coded music data d2) or as the segmented music data d31 in the front frame F1. As the data length (ie, a negative pointer) from the head position of the frame F2 or F3 to be stored originally to the storage position of the head of these divided coded music data d2 or the segmented music data d31, the value of the storage position notification information, The storage positions at the heads of the divided coded music data d2 and the divided music data d31 are shown. Accordingly, in the MP3 format, upon playback of the MP3 file D1, the frame F1 in front of the own frame F1 or the frames F1 ahead of the corresponding frames F2 and F3 is referred to in accordance with the storage position notification information in each of the frames F1 to F3. The division coded music data d1, d2, and the subdivided music data d31 to d33, d41 in F3 to F3 can be reproduced with proper use.

By the way, as shown in FIG. 8, such MP3 file D2 may be divided | segmented at the boundary of the frame Fm and the frame Fm + 1 which are adjacent to each other, for example, and may be edited so that two MP3 files D3 and D4 may be created before and after. According to such divisional editing on the MP3 file D2, the new MP3 file D4 on the rear side has at least a portion of the divided coded music data originally stored in the first frame (hereinafter, particularly, the first frame) Fm + 1. There may be a case where the rear frame of the new MP3 file D3 on the front side (hereinafter, this is called a rear frame in particular) Fm. In this regard, in the example shown in Fig. 8, only a part of the divided coded music data to be originally stored in the main data storage unit MDm + 1 of the first frame Fm + 1 in the new MP3 file D4 on the rear side is divided into pieces of the divided music data dm. It is stored as +13. The remaining portions of the divided coded music data are segmented music data dm + 11 and dm + 12, and the front frames Fm-1 and Fm (that is, the rear frame Fm-1 of the new MP3 file D3 on the front side). And the main data storage units MDm-1 and MDm of Fm).

According to such divisional editing, in the main frame Fm + 1 of the rear MP3 file D4, in the main data storage MDm-1 of the frame Fm-1 in front of the front frame Fm + 1 with respect to the side information storage unit, The storage position notification information indicating the storage position of the subdivided music data dm + 11 is stored. Therefore, for example, when continuously playing the front and rear MP3 files D3 and D4, the storage position notification information stored in the first frame Fm + 1 of the rear MP3 file D4 is followed, and the front frame Fm-1 (i.e., By referring to the frame Fm-1) of the front MP3 file D3, the rear MP3 file D4 subsequent to the front MP3 file D3 can be continuously played without any problem. However, when continuously playing other MP3 files different from the front MP3 file D3 and the rear MP3 file D3, the storage position notification information stored in the first frame Fm + 1 of the rear MP3 file D4 is followed, Since the frame of the MP3 file is referred to, other split coded music data or segmented music data irrelevant to the segmented music data to be used for the original playback process is used for the playback process. As a result, in such continuous playback, in the reproduction processing for the rear MP3 file D4, the divided coded music data or the segmented music data of the other MP3 file in the front, which is not related to the rear MP3 file D4, are reproduced together to generate noise. It may be the cause of occurrence.

As shown in Fig. 9, in the MP3 format, for example, an addition called "ID3v2tag" or "ID3v1tag" which stores attribute information such as a title for music content with respect to the head and tail of an MP3 file D1 of one track, for example. It is also specified that data FD1 and FD2 can be added. By the way, when a PC or the like has been edited so that, for example, at least two MP3 files added with additional data at the head and tail, respectively, are directly connected, as shown in Fig. 10, the seemingly additional data FD3 and FD4 are respectively shown at the head and tail. This added new MP3 file D5 can be created. However, the MP3 file D5 generated by such a connection editing has additional data added to the middle part between the head and the tail, for example, at the end of one MP3 file D5A before the connection editing and the other MP3 file D5B. The additional data added at the beginning of may be included as the negative data ND1 that interferes with the reproduction process (for example, cannot reproduce at all or causes noise).

Furthermore, as shown in Figs. 11A to 11C, when the MP3 file D1 is generated by compressing and encoding music data by the compression coding circuit, the trailing frame depends on the specification of such a compression coding circuit. With respect to the frame header Hn of Fn, the size information which incorrectly represents the frame size of this rear-frame Fn as frame size FS2 longer than actual frame size FS1 may be memorize | stored, for example. When the MP3 file D1 and the other MP3 file D6 are continuously played back, when the rear frame Fn of the MP3 file D1 is reproduced, the wrong frame size is followed, and the other MP3 following this tail frame Fn is followed. Partial F1aa on the frame header side in the first frame F1a of the file D6 is also reproduced. As a result, in such continuous playback, in the playback processing for the front MP3 file D1, a part of F1aa of the other MP3 file D6 on the rear side, which is not related to the front MP3 file D1, is played back together, causing noise. There is a case.

For this reason, in the content recording / reproducing apparatus 1 according to the present embodiment, when the MP3 file is read and input from the USB device 33 for recording, the playback processing is performed as it is without any special processing in the subsequent playback. The MP3 file can be recorded on the hard disk drive 26. Therefore, the following describes the input recording process (hereinafter, referred to as file input recording process) of the MP3 file executed by the content recording and reproducing apparatus 1 using FIGS. 12 to 15. The file input recording process shown below is actually executed by the CPU 20 in accordance with the software of the user interface 40, the middleware 41, and the plug-in 43 described above with reference to FIG. The interface 40, the middleware 41, and the plug-in 43 will be described and described as if they were functional blocks.

First, in the file input recording processing sequence, the user interface 40 displays a process selection screen (not shown) on the display 37 via, for example, the display controller 36, and starts the processing sequence RT1. do. When the user interface 40 starts such processing procedure RT1, the user interface 40 prepares and waits for input of the MP3 file on the process selection screen in accordance with the operation of the operation key 24 by the user in step SP1. The user interface 40 moves to the next step SP2 when the user is requested to input the MP3 file. Accordingly, in step SP2, the user interface 40 notifies the middleware 41 of the start of input of the MP3 file, and moves to the next step SP3.

At this time, the middleware 41 starts processing sequence RT2 in association with the start of the processing sequence RT1 by the user interface 40, for example. When the middleware 41 starts such processing procedure RT2, it communicates and connects via the USB device 33 and the USB interface 32 according to the input start notified from the user interface 40 in step SP11, and next. Go to step SP12. In step SP12, the middleware 41 reads the file name and the like of the MP3 file for each track stored therein from the USB device 33 and from the USB device 33 by the read file name and the like. A list of MP3 files that can be input (hereinafter, referred to as an inputtable file list) is created, and the process moves to the next step SP13. Accordingly, in step SP13, the middleware 41 passes this inputtable file list to the user interface 40, and moves to the next step SP14.

At this time, in step SP3, the user interface 40 generates a file selection screen based on the list of inputtable files received from the middleware 41 and displays the list of inputtable MP3 files, and displays them through the display controller 36. After displaying at 37, it moves to next step SP4. In step SP4, the user interface 40 prepares and waits for the MP3 file to be input from the USB device 33 to be selected on the file selection screen according to the operation of the operation key 24 by the user. The user interface 40 moves to the next step SP5 when the MP3 file input from the USB device 33 is selected by the user. In step SP5, the user interface 40 prepares and waits for an input execution of an MP3 file to be requested on the file selection screen in accordance with the operation of the operation key 24 by the following user. The user interface 40 moves to the next step SP6 when the user is requested to execute the input of the MP3 file. Accordingly, in step SP6, the user interface 40 notifies the middleware 41 of the execution of the input of the MP3 file together with the MP3 file selected by the user, and moves to the next step SP7.

At this time, in step SP14, the middleware 41 performs a series of processing for actually inputting and recording the MP3 file to the plug-in 43 in accordance with the input execution of the MP3 file notified by the user interface 40 (hereinafter, referred to as the middleware 41). , Specifically called input execution request processing). The middleware 41 inquires of the MP3 file selected by the user notified from the user interface 40 and the inputtable file list, and selects one MP3 file (ie, one track MP3) from the inputtable file list. File), and move on to next step SP15. However, the middleware 41 selects and ends all the MP3 files (that is, the MP3 files selected by the user) from the inputtable file list and does not execute the processing of step SP14 when there is no selection. Move to the next step SP15. In step SP15, the middleware 41 determines whether or not the MP3 file to be input exists. If an affirmative result is obtained in this step SP15, this indicates that the middleware 41 requests the plug-in 43 to input and record all the MP3 files selected by the user and not finish. Therefore, the middleware 41 moves to the next step SP16 at this time. Accordingly, in step SP16, the middleware 41 generates an input processing execution request for the MP3 file selected in step SP14, passes it to the plug-in 43, and moves to the next step SP17.

At this time, the plug-in 43 starts processing sequence RT3 in conjunction with the start of the processing sequence RT1 by the user interface 40, for example. When the plug-in 43 starts this processing sequence RT3, in response to the input processing execution request given from the middleware 41 in step SP31, the plug-in 43 receives the middleware 41 from the USB device 33 via the USB interface 32. MP3 files of one track selected by ") are read and temporarily recorded in the RAM 23, and the process proceeds to the next step SP32. In step SP32, the plug-in 43 executes a file checking process for checking whether the MP3 file temporarily recorded in the RAM 23 can be reproduced without any problem after recording on the hard disk drive 26. Move on to step SP33.

In step SP33, the plug-in 43 determines whether or not the MP3 file temporarily recorded in the RAM 23 can be recorded on the hard disk drive 26 in accordance with the result of the file inspection process. If an affirmative result can be obtained in this step SP33, this indicates that even if such an MP3 file is recorded on the hard disk drive 26, it can be reproduced as it is without any special processing when the reproduction is later requested. Therefore, plug-in 43 moves to next step SP34 at this time. Accordingly, in step SP34, the plug-in 43 reads the MP3 file from the RAM 23, records the read MP3 file on the hard disk drive 26, and moves to the next step SP35. In step SP35, the plug-in 43 notifies the middleware 41 that the recording process of the MP3 file has been completed, and moves to the next step SP36. In step SP36, the plug-in 43 determines whether or not the middleware 41 is notified of the end of the input execution request processing. If a negative result can be obtained in this step SP36, this indicates that the middleware 41 is still executing the input execution request processing, and therefore the input processing execution request is given again from the middleware 41. Therefore, plug-in 43 returns to step SP31 at this time.

In this regard, if a negative result can be obtained in the above-described step SP33, this means that if the MP3 file temporarily recorded in the RAM 23 is recorded on the hard disk drive 26, the playback process and the next time playback is requested, In addition, it indicates that special processing such as eliminating the cause of noise generation is also required. Therefore, the plug-in 43 does not record the MP3 file temporarily recorded in the RAM 23 to the hard disk drive 26 at this time, and moves to step SP36.

By the way, in step SP17, as the middleware 41 completes the recording of the MP3 file notified from the plug-in 43, the plug-in 43 inputs the MP3 file from the USB device 33 to the RAM ( At the time of recording temporarily at 23), it is determined whether or not an input error of such an MP3 file has occurred. If a negative result can be obtained in step SP17, this indicates that the MP3 file of one track can be input from the USB device 33 without interruption and can be temporarily recorded in the RAM 23. That is, this negative result indicates that the file inspection process is performed on the MP3 file of one track, and as a result, the MP3 file of the one track is recorded on the hard disk drive 26 by determining that it is recordable. Therefore, the middleware 41 moves to step SP18 at this time. In step SP18, the middleware 41 registers one track of the MP3 file recorded on the hard disk drive 26 in a database previously built in the hard disk driver 26 (actually, the file name of the MP3 file or the hard disk). The attribute information consisting of the write address and the like on the image is registered).

As a result, the middleware 41 cyclically repeats the processing of steps SP14 to SP18 until the negative result is obtained in step SP15 or until the positive result is obtained in step SP17. Run As a result, the middleware 41 instructs the plug-in 43 to input and process the MP3 file selected by the user for each track in sequence. Accordingly, the plug-in 43 repeatedly executes the processes of steps SP31 to SP36 to input MP3 files of one track sequentially from the USB device 33, and the corresponding MP3 files only when recordable. To the hard disk drive 26. The middleware 41 registers the MP3 file of one track in the database whenever the MP3 file of one track is recorded on the hard disk drive 26 by the plug-in 43 in this way.

By the way, if a negative result can be obtained in the above-described step SP15, this indicates that the middleware 41 has asked the plug-in 43 to input and record all the MP3 files selected by the user, and finished. Therefore, the middleware 41 moves to step SP19 at this time. In step SP19, the middleware 41 cuts the communication connection with the USB device 33 at this time, and then moves to the next step SP20. In step SP20, the middleware 41 notifies the user interface 40 that the user has selected the input recording process for the MP3 file by the user, and then proceeds to step SP21. To exit.

If a positive result can be obtained in the above-described step SP17, this means that, for example, while the MP3 file of one track is being input from the USB device 33, for example, the USB device 33 from the content recording / reproducing device 1 By accidentally detaching, it indicates that the MP3 file cannot be entered in the middle. That is, this positive result is determined by recording the MP3 file input from the USB device 33 as being recordable to the hard disk drive 26, but the MP3 file is not filled in one track (i.e., one track of the track). Is part of it). Therefore, the middleware 41 notifies the completion of recording of the MP3 file from the plug-in 43 at this time, but does not register the MP3 file in the database. That is, since the middleware 41 records the MP3 file recorded on the hard disk drive 26 as part of one track, the MP3 file is not recorded on the hard disk drive 26, and the process proceeds to step SP19. In step SP19, the middleware 41 moves to the next step SP20 as it is since the communication connection with the USB device 3 has already been cut, for example. In addition, in step SP20, the middleware 41 informs the user interface 40 at this time that the input recording process for the MP3 file selected by the user has been forcibly terminated, and then proceeds to step SP21. The processing sequence RT2 is terminated.

Therefore, in step SP7, when the user interface 40 is notified from the middleware 41 that the input recording process for the MP3 file is normally completed, the user interface 40 notifies this to the user via the display 37, for example. The flow advances to the next step SP8 to complete the processing sequence RT1. In contrast, in step SP7, when the user interface 40 is notified by the middleware 41 that the input recording process for the MP3 file has failed, the user interface 40 notifies the user of, for example, the display 37. The flow advances to the next step SP8 to complete the processing sequence RT1.

In this regard, in step SP20 described above, the middleware 41 notifies the plug-in 43 of this even if the input recording process for the MP3 file is finished at all or halfway. Therefore, in step SP36, the plug-in 43 obtains an affirmative result at this time, moves to the next step SP37, and terminates the processing procedure RT3. In this manner, in practice, the CPU 20 executes the above-described series of file acquisition recording processing procedures along the user interface 40, middleware 41, and plug-in 43, thereby obtaining the MP3 file from the USB device 33. Write to the hard disk drive 26.

By the way, in step SP32 in the above-described file input recording processing procedure, the plug-in 43 executes the file inspection processing procedure RT4 shown in FIG. That is, the plug-in 43 starts the file check processing procedure RT4 when it is moved to step SP32 in the file input recording processing procedure. When the file check processing procedure RT4 is started, the plug-in 43 scans at step SP321 to detect the header discrimination information from the beginning to the end of the MP3 file temporarily recorded in the RAM 23. The plug-in 43 then determines whether or not the frame header of one frame is detected in such an MP3 file. If a positive result can be obtained in this step SP321, this indicates that an MP3 file input from the USB device 33 and temporarily recorded in the RAM 23 may be legitimately generated to have a frame structure in accordance with the MP3 format. . In this regard, in step SP321, the plug-in 43 scans to detect the header discrimination information from the beginning to the end of the MP3 file. Therefore, if a frame exists in the MP3 file, the plug-in 43 detects the frame header of the first frame. do. Therefore, plug-in 43 moves to next step SP322 at this time.

In step SP322, the plug-in 43 determines whether the header data stored in the frame header detected in step SP321 is correctly generated in accordance with the MP3 format. If a positive result can be obtained in this step SP322, this indicates that since the header data is generated in accordance with the MP3 format, there is a high possibility of being legitimately generated for the MP3 file in the RAM 23. Therefore, plug-in 43 moves to next step SP323 at this time. In step SP323, the plug-in 43 scans the MP3 file so as to detect the header discrimination information from the position of the frame header detected at the rearmost end to the rear end at this time. Therefore, the plug-in 43 determines whether or not the end of continuous detection of the frame header is detected in the MP3 file. If a negative result can be obtained in this step SP323, this is the range of the position of the frame header detected from the rearmost side in the MP3 file from the rear side, for example, a predetermined data length preselected according to the MP3 format. For example, the frame header is detected again within the range (e.g., the maximum frame size that can be received by one frame, which is referred to as the frame continuous detection range in the following). In other words, this negative result indicates that the MP3 file in the RAM 23 continuously generates frames in accordance with the MP3 format. Therefore, plug-in 43 returns to step SP322 at this time.

Therefore, the plug-in 43 cyclically repeats the processing of step SP322 and step SP323 until the negative result is obtained in step SP322 or until the positive result is obtained in step SP323. do. As a result, the plug-in 43 can check whether the MP3 file in the RAM 23 is constituted by successive frames according to the MP3 format. If an affirmative result is obtained in step SP323, this indicates that the frame header has not been detected within the frame continuous detection range from the position of the frame header detected at the rearmost end to the MP3 file. In other words, this affirmative result indicates that the end of detection of the frame header has been detected for the MP3 file in the RAM 23. Therefore, plug-in 43 moves to next step SP324 at this time.

In step SP324, the plug-in 43 starts the end of the MP3 file together with the frame header from the scanning position at the time of detecting the end of detection of the frame header in the MP3 file in the RAM 23 (hereinafter, Scan to detect file termination). In this connection, the plug-in 43 detects the file end by finding additional data FD2 (Fig. 9) added to the rear of the MP3 file. The plug-in 43 then determines whether or not the file end is detected in the MP3 file in the RAM 23. If a positive result can be obtained in this step SP324, this indicates that the end of the file is detected without detecting the frame header again from the end of the detection of the frame header in the MP3 file. That is, this affirmative result indicates that the MP3 file temporarily recorded in the RAM 23 does not include the negative data ND1 described above with reference to FIG. 10 in the middle portion from the head to the tail. Therefore, plug-in 43 moves to next step SP325 at this time.

In step SP325, the plug-in 43 determines whether or not the head frame is configured to refer to a frame ahead in the reproduction process based on the storage position notification information stored in the head frame of the MP3 file in the RAM 23. do. If a negative result can be obtained in this step SP325, this indicates that the divided coded music data allocated for storage to the head frame of the MP3 file in the RAM 23 is stored as it is. Therefore, plug-in 43 moves to next step SP326 at this time.

In step SP326, the plug-in 43 determines whether or not the frame size of the trailing frame is normal based on the size information stored in the trailing frame of the MP3 file in the RAM 23. Here, the plug-in 43 measures the physical file size of the MP3 file in the RAM 23 while executing the processes from the above-described steps SP321 to SP324, for example. The plug-in 43 sequentially adds the frame sizes indicated by the size information stored in these frame headers each time the frame header is detected by performing the above-described steps SP321 and the recursive processing of steps SP322 and SP323. By doing so, the logical file size of the MP3 file is calculated. Thus, the plug-in 43 actually compares these physical file sizes with the logical file size (i.e., compares the physical file end position with the logical file end position for the MP3 file), Based on the comparison result, it is determined whether or not the frame size of the rear frame is normal.

If a positive result can be obtained in this step SP326, this means that the physical file size and logical file size for the MP3 file in the RAM 23 correspond to the frame size stored in the trailing frame (that is, the size information). ) Is normal. Therefore, plug-in 43 is moved to next step SP327 at this time. As a result, the plug-in 43 ends the file check processing procedure RT4.

By the way, if a negative result can be obtained in step SP326, this means that the physical file size and logical file size for the MP3 file in the RAM 23 are different, so that the frame size stored in the trailing frame is negative (i.e., Is actually different). That is, such a negative result is that if the MP3 file temporarily recorded in the RAM 23 is intact, for example, as described above with respect to Figs. The first part of the file is also reproduced and matched with each other, and the first part of the subsequent other MP3 file indicates that noise is generated in the reproducing process. Therefore, plug-in 43 moves to next step SP328 at this time. In step SP328, the plug-in 43 deletes the trailing frame of the MP3 file in the RAM 23. Accordingly, when the MP3 file is continuously played back, the plug-in 43 avoids the playback process by matching the head part of another subsequent MP3 file in advance, and proceeds to step SP327 to replace the file check processing procedure RT4. Quit.

In addition, if a negative result can be obtained in the above-described step SP321, this is temporarily recorded in the RAM 23 by inputting data from the USB device 33, which is unlikely to be generated, for example, unjustly generated from the MP3 file. Show what you were doing. Therefore, plug-in 43 moves to step SP329 at this time. Furthermore, if a negative result can be obtained in the above-described step SP322, this indicates that the MP3 file in the RAM 23 was generated incorrectly because the header data is generated without following the MP3 format. Therefore, plug-in 43 moves also to step SP329 at this time.

Furthermore, if a negative result can be obtained in the above-described step SP324, this indicates that the frame header is detected again before the detection of the end of the file in the MP3 file. In other words, this negation result indicates that the MP3 file temporarily recorded in the RAM 23 is inaccurately contained in the negation data ND1 described above with reference to FIG. 10 in the middle portion from the beginning to the rear. Therefore, plug-in 43 moves also to step SP329 at this time. If a positive result can be obtained in the above-described step SP325, this means that the divided coded music data allocated to the first frame is not stored at all or only a part of the first frame of the MP3 file in the RAM 23 is stored. Indicates not to In other words, this affirmative result indicates that the MP3 file temporarily recorded in the RAM 23 is divided and edited as described above with respect to FIG. 8 so that the leading frame is configured to refer to a frame ahead of this in continuous playback. . Therefore, plug-in 43 moves also to step SP329 at this time.

In step SP329, the plug-in 43 stops the above-described series of processes for checking the MP3 file temporarily recorded in the RAM 23, and moves to step SP327 to execute the file check processing procedure RT4. Quit. In this way, when the plug-in 43 finishes this file check processing procedure RT4, it moves to step SP33 of its own processing procedure RT3 in the above-mentioned file input recording processing procedure. By the way, when the plug-in 43 ends the file check processing procedure RT4 after executing the processes of step SP326 and step SP328, the MP3 file temporarily recorded in the RAM 23 is continuously reproduced after the noise. It is determined that the reproduction processing can be performed as it is without performing any special processing such as eliminating the cause of occurrence of error. Therefore, in this case, the plug-in 43 stores the MP3 file temporarily recorded in the RAM 23 on the hard disk drive 26 in step SP33 of its own processing procedure RT3 in the file input recording processing sequence. It is determined that it can be recorded.

In contrast, when the plug-in 43 finishes the file check processing procedure RT4 after executing the process of step SP329, the MP3 file temporarily recorded in the RAM 23 can be continuously played back or played back alone. At this time, it is determined that reproduction processing cannot be performed normally unless special processing such as removing the cause of noise generation is performed. Therefore, the plug-in 43, at this time, in step SP33 of its own processing procedure RT3 in the file input recording processing sequence, the MP3 file temporarily recorded in the RAM 23 to the hard disk drive 26. It judges that recording is impossible.

In this way, each time the plug-in 43 reads one track of MP3 files from the USB device 33 and temporarily records them in the RAM 23, the MP3 files may be requested for continuous playback or single playback later. At this time, it is checked whether playback can be performed without any special processing. The plug-in 43, in response to the inspection result, requests a special process other than the reproduction process when the subsequent reproduction or the individual reproduction is requested later. By not recording, an increase in the processing load during the reproduction processing is avoided in advance.

In the above configuration, when the CPU 20 of the content recording / reproducing apparatus 1 reads and inputs an MP3 file from the USB device 33, the MP3 file is temporarily recorded in the RAM 23. In this state, the CPU 20 first determines whether or not such an MP3 file has been properly generated in accordance with the MP3 format. As a result, when the CPU 20 detects that such an MP3 file is duly generated in accordance with the MP3 format, the CPU 20 determines whether or not the head frame of the MP3 file refers to the preceding file at the time of reproduction processing. If the head file of the MP3 file is configured to refer to the front file, the CPU 20 prohibits recording of the MP3 file to the hard disk drive 26.

In addition, when the head frame of the MP3 file is not configured to refer to the front file, the CPU 20 records the MP3 file in the hard disk drive 26. However, when the physical frame size of the trailing frame of such an MP3 file is different from the frame size indicated by the size information stored in the trailing frame (that is, the logical frame size), the CPU 20 trails the MP3 file at the trailing edge. The frame is recorded on the hard disk drive 26 in a deleted form.

That is, in the content recording and reproducing apparatus 1, even if the MP3 file read out from the USB device 33 is duly generated in accordance with the MP3 format, if the first frame is configured to refer to the preceding frame at the time of reproduction processing, it remains as it is. In the recording on the hard disk drive 26, the playback process of the first frame of the MP3 file subsequent to the other MP3 file in subsequent continuous playback refers to the frame of the corresponding other MP3 file, which is completely unrelated. Since no divided coded music data or segmented music data is used, the divided coded music data or segmented music data causes noise.

For this reason, the content recording / reproducing apparatus 1 does not record the MP3 file configured such that the first frame is referred to the front frame at the time of reproduction processing from the USB device 33 even if it is read from the USB device 33. In the hard disk driver 26, an MP3 file whose head frame is not configured to refer to a front frame at the time of reproduction processing is recorded. In other words, when the MP3 file is recorded on the hard disk drive 26, the content recording and reproducing apparatus 1 records the MP3 file which can be reproduced as it is without performing any special processing in subsequent subsequent reproduction.

According to the above structure, the content recording / reproducing apparatus 1 reads the MP3 file stored therein from the USB device 33 and temporarily records it in the RAM 23, and in this state, the first frame of the MP3 file is In the reproduction processing, it is determined whether or not the front frame is referred to, and according to the determination result, the MP3 file temporarily recorded in the RAM 23 is recorded in the hard disk drive 26. Accordingly, when the MP3 file is recorded on the hard disk drive 26, the content recording and reproducing apparatus 1 records the MP3 file that can be played back as it is without any special processing when continuous playback is required later. can do. Therefore, the content recording and reproducing apparatus 1 can avoid increasing the processing load during continuous reproduction of the MP3 file.

By the way, in the content recording and reproducing apparatus 1, for example, when an MP3 file having an invalid frame size of a trailing frame is recorded on the hard disk drive 26 as it is, when the MP3 file is continuously played back together with other MP3 files, the wrong Depending on the frame size, the rear frame of the MP3 file is reproduced together with a part of the head frame of the other MP3 file following this, and this portion causes noise. For this purpose, the content recording and reproducing apparatus 1 is not configured so that the leading frame of the MP3 file refers to the front file at the time of reproduction processing, but the logical frame size in which the physical frame size of the trailing frame is stored in the trailing frame. At other times, the MP3 file was deleted at its trailing frame and written to the hard disk drive 26. Therefore, when the MP3 file recorded on the hard disk drive 26 is continuously reproduced later, the content recording and reproducing apparatus 1 can avoid the occurrence of noise when the rear frame portion of the MP3 file is reproduced. . In other words, when the MP3 file recorded on the hard disk drive 26 is continuously reproduced along with other MP3 files, the content recording and reproducing apparatus 1 has no special processing for normal playback processing of the trailing frame for such MP3 files. The reproduction processing can be performed as is without performing. Therefore, the content recording and reproducing apparatus 1 can avoid increasing the processing load of the reproducing process during continuous reproduction of the MP3 file.

In the MP3 file read from the USB device 33, the content recording and reproducing apparatus 1 detects the frame header on the way from the state in which the frame header is continuously detected from the beginning thereof. Even when detecting the end of detection, when detecting the frame header again in between, it is assumed that such an MP3 file contains the illegal data ND1 and is not recorded on the hard disk drive 26. That is, in the content recording and reproducing apparatus 1, when the negative data ND1 is included in the middle portion of the MP3 file read out from the USB device 33, in the case where such MP3 file is recorded on the hard disk drive 26 as it is, In later playback, it becomes difficult to accurately reproduce the MP3 file by the negative data ND1 included therein. For this reason, in the content recording and reproducing apparatus 1, for example, when reproducing an MP3 file containing such negative data ND1, a process is required to find and remove the negative data ND1, for example. However, the content recording and reproducing apparatus 1 does not record such an MP3 file on the hard disk drive 26, so that a special process such as finding and removing the illegal data ND1 is required during later playback. Can be avoided. Therefore, the content recording and reproducing apparatus 1 can avoid increasing the processing load of the reproduction processing for the MP3 file.

(3) Other Embodiments

In the above-described embodiment, when the MP3 file is read and recorded from the USB device 33 in the content recording and reproducing apparatus 1, the MP3 file is inspected and the hard disk drive 26 is in accordance with the test result. The present invention is not limited to this, but the MP3 file reproduced from another recording medium such as a CD or an MP3 recorded on a shared server on a network is described. In addition, MP3 files, such as files and MP3 files provided by a content distribution server on a network, may be inspected and recorded on the hard disk drive 26 in accordance with the inspection results. In this regard, in the content recording and reproducing apparatus 1, when the additional data FD1 and FD2 are added to the head and tail of the externally input MP3 file, the additional data FD1 and FD2 are removed from the MP3 file, and then the hard disk drive is removed. It may be recorded in (26).

In the above-described embodiment, in the content recording and reproducing apparatus 1, in the case where the MP3 file whose first frame is configured to refer to the frame in front of the playback process is not recorded on the hard disk drive 26, Although the present invention is not limited to this, continuous playback object exclusion information indicating that the MP3 file is excluded from the playback object only when the MP3 file is continuously played because noise may be generated only during continuous playback. May be added to the hard disk drive 26 to permit individual reproduction. In the content recording and reproducing apparatus 1, as well as the above-described configuration, the content recording and reproducing apparatus 1 can obtain an effect of avoiding an increase in the processing load during continuous reproduction of the MP3 file. In addition, in the content recording and reproducing apparatus 1, even when an MP3 file whose frame size of the trailing frame is invalid is noisy as to the continuous playback of such an MP3 file, the trailing frame is not removed from the MP3 file. It is also possible to add the continuous reproduction target exclusion information to the hard disk drive 26 and permit individual reproduction.

Furthermore, in the above embodiment, in the content recording and reproducing apparatus 1, when the logical frame size of the trailing frame of the MP3 file is longer than the physical frame size, the MP3 file is removed from the hard disk drive except for the trailing frame. Although a case has been described in (26), the present invention is not limited thereto, and when the trailing frame size of the MP3 file is shorter than the physical frame size, the trailing portion of the trailing frame is excluded except for the trailing frame. The MP3 file may be recorded on the hard disk drive 26 by cutting the logical frame size to match the physical frame size.

Moreover, in the above-described embodiment, the case where the data recording apparatus according to the present invention is applied to the data recording apparatus 100 and the content recording and reproducing apparatus 1 described above with reference to FIGS. 1 to 15 has been described. The present invention is not limited to this, and other various information such as a computer, a mobile phone, a PDA (Personal Digital Assistance), a game device, a recording device such as a DVD (Digital Versatile Disc) recorder or a hard disk recorder, etc. The data recording apparatus of the configuration can be applied.

Furthermore, in the above-described embodiment, the data recording program according to the present invention is applied to the user interface 40, the middleware 41, and the plug-in 43 described above with reference to FIGS. 1 to 15, and the CPU 20. Will be described in accordance with the user interface 40, middleware 41, and plug-in 43 to execute the file input recording processing procedure described above with reference to FIGS. 12, 13, 14, and 15. However, the present invention is not limited thereto, and the file input recording processing procedure is applied by applying a data recording program having various configurations and installing the program storage medium storing the data recording program in the content recording / reproducing apparatus 1. You may run it.

Furthermore, in the above-described embodiment, a case has been described in which the audio data and the MP3 file described above with reference to FIGS. 1 to 15 are applied as the audio data. However, the present invention is not limited to this, and has an audio having a frame structure. If it is data, audio data of other various formats can be applied.

Furthermore, in the above-described embodiment, as an external storage medium for storing audio data, the external storage medium 102 described above with reference to FIGS. 1 to 15, the external device 15 of the content recording / reproducing apparatus 1, Although the case where the USB device 33 is to be applied has been described, the present invention is not limited to this, and an external recording medium such as a CD-RAM that can be reproduced by the content recording and reproducing apparatus 1 can be used as long as it stores audio data. 13) or various external storage media, such as a server on a network, can be applied.

Furthermore, in the above-described embodiment, the temporary storage medium 103 of the data recording apparatus 100 described above with reference to FIGS. 1 to 15 and the contents as a temporary storage medium for recording audio data stored in an external storage medium. Although the case where the temporary storage part 4 and the RAM 23 of the recording / reproducing device 1 are applied has been described, the present invention is not limited thereto, and the recording is detachably attached to the content recording / reproducing device 1. As the medium, other various temporary storage media can be widely applied.

Furthermore, in the above-described embodiment, the data recording apparatus described above with reference to Figs. 1 to 15 as the first recording unit for reading audio data stored in the external storage medium and recording the temporary data in accordance with the audio data input request. Although a case has been described in which the first recording unit 101 of 100 or the control unit 2 and the CPU 20 of the content recording and reproducing apparatus 1 are applied, the present invention is not limited thereto, and the audio data input request is not limited thereto. Accordingly, various first recording units can be applied, such as a recording circuit having a hardware configuration that reads audio data stored in an external storage medium and writes the data to a temporary storage medium.

Furthermore, in the above-described embodiment, the detection unit detects whether or not the head frame of the audio data recorded on the temporary storage medium by the first recording unit refers to the frame ahead. Although the case where the detection part 104 of the data recording apparatus 100 and the control part 2 and the CPU 20 of the content recording / reproducing apparatus 1 were applied was described, this invention is not limited to this, The 1st Various detection units can be applied, such as a detection circuit having a hardware configuration for detecting whether the head frame of the audio data recorded on the temporary storage medium by the recording unit refers to the frame ahead.

Furthermore, in the above-described embodiment, the data recording apparatus 100 described above with reference to FIGS. 1 to 15 is a second recording unit for recording audio data recorded on the temporary storage medium in the storage medium according to the detection result by the detection unit. In the case where the second recording unit 105 of FIG. 1), the built-in recording medium driving unit 7 of the content recording and reproducing apparatus 1, and the CPU 20 are applied, the present invention is not limited thereto, and the detection unit is not limited thereto. According to the detection result by this, various other second recording units can be applied, such as a recording circuit having a hardware configuration for recording audio data recorded on the temporary storage medium into the storage medium.

Furthermore, in the above-described embodiment, as a storage medium for recording audio data recorded in the temporary storage medium, the storage medium 106 of the data recording apparatus 100 and the content recording / reproducing described above with reference to FIGS. Although the case where the built-in recording medium 8 and the hard disk drive 26 of the apparatus 1 are applied was described, this invention is not limited to this, The content recording and reproducing apparatus 1 is detachably loaded. Various storage media can be applied, such as storage media.

According to the present invention, in response to an audio data input request, audio data stored in an external storage medium is read out, the read audio data is recorded in a temporary storage medium, and the head frame of the audio data recorded in the temporary storage medium is recorded. When the audio data is recorded on the storage medium by detecting whether the front frame is referenced or not, and recording the audio data recorded on the temporary storage medium on the storage medium according to the detection result. Data recording method and data recording apparatus capable of recording audio data that can be reproduced as is without performing any special processing in reproduction, thereby avoiding an increase in processing load during continuous reproduction of audio data. And data recording programs.

Claims (5)

A first recording step of reading audio data stored in an external storage medium and recording the temporary data in accordance with an audio data input request; A detection step of detecting whether or not the head frame of the audio data recorded in the temporary storage medium refers to a frame ahead; And a second recording step of recording the audio data recorded on the temporary storage medium into a storage medium, in accordance with a detection result obtained in the detection step. The method of claim 1, The second recording step, The audio data frame header is sequentially detected, and after detecting the end of detection of the frame header, when the frame header is detected again, it is assumed that negative data is included in the middle portion of the audio data. Prohibiting the recording of the audio data. The method of claim 1, The second recording step, And when the end position specified by the size of the audio data does not coincide with the end position indicated by the frame header of the trailing frame, the audio data excluding the trailing frame is recorded in the storage medium. Recording method. A first recording unit for reading audio data stored in an external storage medium and recording the temporary data in accordance with an audio data input request; A detection section for detecting whether the first frame of the audio data recorded in the temporary storage medium by the first recording section refers to a frame ahead; And a second recording unit for recording the audio data recorded on the temporary storage medium into a storage medium in accordance with a detection result by the detection unit. About the information processing device, A first recording step of reading audio data stored in an external storage medium and recording the temporary data in accordance with an audio data input request; A detection step of detecting whether or not the first frame of the audio data recorded in the temporary storage medium refers to a frame ahead; And a second recording step of recording the audio data recorded on the temporary storage medium into a storage medium in accordance with a detection result obtained in the detection step.

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