JP2007079063A - Data processing apparatus, data processing method and data processing control program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a data processing apparatus in which a processing load of a main control section is reduced. <P>SOLUTION: A control section 52 detects a terminal processing executing instruction and an input data size for first data PD inputted to a data processing section 53 and calculates an output data size corresponding to said input data size. When the first data inputted to the data processing section 53 reach the input data size in a case where the terminal processing executing instruction is detected, all processing data in the data processing section 53 are processed and outputted but in a case where the terminal processing executing instruction is not detected, the data processing section 53 is operated until output data reach the output data size. Thus, only by notifying whether the execution of terminal processing is instructed and the input data size from a main control section, terminal processing can be executed in accordance with whether the execution of terminal processing is instructed or not, and a processing load of the main control section can be reduced. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a data processing device, a data processing method, and a data processing control program, and is suitably applied to, for example, a content recording / playback device that records and plays back music content.

  When a conventional personal computer compresses and encodes a plurality of music data in a predetermined compression / decompression format (hereinafter referred to as a codec format) (hereinafter referred to as an encoding process), each music data Are divided into orthogonal transform blocks each consisting of predetermined samples. When the position of the rear end of the orthogonal transformation block located at the end of the music data does not match the last position of the music data, the personal computer should store the data in the orthogonal transformation block located at the end of the music data. The sample is stored at the beginning of the first orthogonal transform block of the next music data. Further, the personal computer, for the last music data, when the position of the rear end of the orthogonal transform block located at the end does not match the last position of the music data, Following this sample, data of “0” is stored. In this state, the personal computer sequentially encodes each of the plurality of music data into two pieces of one orthogonal transformation block and the next one orthogonal transformation block, thereby generating a plurality of continuous encoded data. Was.

In addition, when a personal computer performs decompression decoding processing (hereinafter referred to as decoding processing) on a plurality of continuous encoded data generated by the above-described encoding processing, the plurality of encoded data are sequentially decoded one by one. As a result, a plurality of orthogonal transform blocks including predetermined samples are generated. The personal computer generates the original orthogonal transform block by adding predetermined portions of the plurality of orthogonal transform blocks (see, for example, Patent Document 1).
JP 2001-175293 A (page 7, page 8, page 9, FIG. 12, FIG. 16)

  By the way, in the personal computer having such a configuration, the main control unit (that is, the central processing unit) performs music according to a compression encoding program (hereinafter referred to as an encoding program) or an expansion decoding program (hereinafter referred to as a decoding program). Data to be processed such as data and encoded data is processed like the above-described encoding and decoding processes. In the personal computer, the main control unit processes data to be processed for each predetermined data unit such as an orthogonal transform block in accordance with, for example, a codec format.

  However, the personal computer detects the data size of the processing target data and whether the processing target data is continuous so that the main control unit can process the processing target data for each predetermined data unit. In order to accurately process the processing target data until the end by connecting the processing target data before and after the detection, and adding, for example, “0” after the last processing target data. The termination process was executed. For this reason, such a personal computer has a problem that the processing load of the main control unit is increased when data to be processed is processed.

  The present invention has been made in view of the above points, and an object of the present invention is to propose a data processing device, a data processing method, and a data processing control program that can reduce the processing load of the main control unit.

  In order to solve such a problem, in the present invention, a decoding unit that decodes input encoded data and outputs the obtained decoded data, encodes the input data, and converts the obtained encoded data to The control unit that controls the data processing unit having at least one of the encoding unit to output, the execution instruction of the termination process for the first data input to the data processing unit, and the first data The input data size is detected, the output data size corresponding to the detected input data size is calculated, and when the termination processing execution instruction is detected, the data size of the first data input to the data processing unit When the input data size reaches the input data size, the data processing unit is controlled to process and output all the processing data in the data processing unit, and the execution instruction of the termination processing is detected. If not, and to control the data processing unit to operate the data processing unit to the data size of the output data outputted from the data processing unit reaches the output data size.

  Therefore, in the present invention, from the main control unit that is the control source of the data processing device, the control unit of the data processing device is instructed to execute termination processing for the first data, and the input data size of the first data , The control unit can control the data processing unit to execute termination processing corresponding to the presence / absence of termination processing execution instruction for the first data.

  According to the present invention, a decoding unit that decodes input encoded data and outputs the obtained decoded data, and an encoding unit that encodes input data and outputs the obtained encoded data The control unit that controls the data processing unit having at least one of and detects the termination processing execution instruction for the first data input to the data processing unit and the input data size of the first data Then, the output data size corresponding to the detected input data size is calculated, and when the termination processing execution instruction is detected, the data size of the first data input to the data processing unit is set to the input data size. When the data processing unit arrives, it controls the data processing unit to process and output all the processing data in the data processing unit, and when the execution instruction for the termination processing is not detected, By controlling the data processing unit to operate the data processing unit until the data size of the output data output from the processing unit reaches the output data size, the main control unit that is the control source of the data processing device From this, the control unit controls the data processing unit only by notifying the control unit of the data processing device of the presence / absence of the execution instruction of the termination processing for the first data and the input data size of the first data. Thus, a data processing device, a data processing method, and data processing control capable of executing termination processing corresponding to the presence / absence of termination processing execution instructions for the first data, thus reducing the processing load on the main control unit. A program can be realized.

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

(1) Outline of Embodiment In FIG. 1, reference numeral 100 denotes a data processing apparatus according to the present invention as a whole. In such a data processing device 100, the data processing unit 101 decodes input encoded data, outputs a decoding processing data obtained, encodes the input data, and obtains the encoded processing data obtained At least one of the encoding units that output. In the data processing apparatus 100, the control unit 102 controls the data processing unit 101.

  In this case, the control unit 102 includes a detection unit 103, a calculation unit 104, and a data processing control unit 105. Then, the detection unit 103 detects a termination processing execution instruction for the first data input to the data processing unit 101 and an input data size of the first data. The calculation unit 104 also calculates an output data size corresponding to the input data size detected by the detection unit 103. Further, the data processing control unit 105 performs data processing when the data size of the first data input to the data processing unit 101 reaches the input data size when the detection unit 103 detects the execution instruction of the termination processing. The data processing unit 101 is controlled so that all the processing data in the unit 101 is processed and output. In addition, when the detection unit 103 has not detected the termination processing execution instruction, the data processing control unit 105 causes the data processing unit 101 to continue until the data size of the output data output from the data processing unit 101 reaches the output data size. The data processing unit 101 is controlled to operate.

  Actually, the data processing control unit 105, when the execution instruction of the termination process is not detected by the detection unit 103, when the data size of the first data input to the data processing unit 101 reaches the input data size, The data processing unit 101 is controlled so that second data subsequent to the first data is input to the data processing unit 101. In addition, when the detection unit 103 has not detected the termination processing execution instruction, the data processing control unit 105 performs the second processing when the data size of the first data input to the data processing unit 101 reaches the input data size. When it is detected that there is no data input, the data processing unit 101 is controlled so that all the processing data in the data processing unit 101 is processed and output. Further, the data processing control unit 105, when the detection unit 103 has not detected the termination processing execution instruction, determines that the encoding method for the second data input following the first data is the code for the first data. When it is detected that the processing method is different from the data conversion method, the data processing unit 101 is controlled so that all the processing data in the data processing unit 101 is processed and output.

(2) Embodiment In FIG. 2, reference numeral 1 denotes a functional configuration of a content recording / playback apparatus that records and plays back music content as a whole, and the control unit 2 stores various programs read from the storage unit 3 as a temporary storage unit 4. The system is integrated and controlled by executing and executing various processes.

  That is, when the control unit 2 recognizes that an operation for obtaining music content distributed from a content distribution server (not shown) on the network NT is performed by the user via the operation unit 5, for example, Then, a request signal for requesting distribution of the music content is transmitted 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 / playback apparatus 1, in response to this, the content distribution server performs a billing process for charging the user of the content recording / playback apparatus 1 for the fee associated with the distribution of the requested music content. Encrypted music data corresponding to the requested music content (hereinafter referred to as encrypted music data) and right information indicating that there is a right to use the music content The content is transmitted to the content recording / playback apparatus 1 via NT. Incidentally, in this case, the right information includes, for example, data that is a source of a decryption key for decrypting encrypted music data (so-called decryption key seed), a content usage condition that indicates the number of times that music content can be played, the number of times that transfer is possible, and the like. In addition, the content usage state and the like indicating the number of times the music content has been actually reproduced and the number of times the music content has been transferred are described.

  When the control unit 2 of the content recording / playback apparatus 1 receives the encrypted music data and the right information transmitted from the content distribution server via the communication unit 6, these are controlled by the built-in recording medium driving unit 7. To the built-in recording medium 8.

  In this way, the content recording / playback apparatus 1 can acquire (download) music content from a content distribution server on the network NT and record the music content on the internal recording medium 8.

  After that, when the control unit 2 recognizes that the user has given an instruction to reproduce the music content recorded on the internal recording medium 8 via the operation unit 5, the control unit 2 encrypts corresponding to the music content accordingly. The music data and its right information are read from the built-in 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.

  The right processing unit 9 confirms whether the right information sent from the built-in recording medium 8 is legitimate. If the right processing section 9 can confirm that the right information is legitimate, the encrypted music corresponding to the right information is obtained. Allow data usage (playback in this case). The right processing unit 9 generates a decryption key for the encrypted music data based on the right information, and passes this 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, and the decryption key is transferred via this dedicated path, thereby preventing the decryption key from being illegally acquired from the outside. Has been made to get.

  The music processing unit 10 obtains music data by decrypting the encrypted music data sent from the internal recording medium 8 with the decryption key passed from the right processing unit 9, and further decompresses and decrypts the music data. A music signal is obtained by sequentially performing processing (hereinafter referred to as “decoding processing”), digital-analog conversion processing, amplification processing, and the like, and this music signal is sent to an external music output unit 11. To output music based on the music signal.

  As described above, the content recording / playback apparatus 1 can play back the music content recorded in the internal recording medium 8.

  In addition, the control unit 2 of the content recording / playback apparatus 1 performs compression encoding processing (hereinafter referred to as “this”) recorded in the external recording medium 13 that is driven and controlled by the external recording medium driving unit 12 according to the operation of the operation unit 5 by the user. Is called music processing (hereinafter referred to as encoded music data), and the music processing unit 10 performs decoding processing, digital analog conversion processing and amplification on the read encoded music data. A music signal is obtained by sequentially performing processing and the like, and music based on the music signal is output from the music output unit 11.

  Further, the control unit 2 reads out the encoded music data recorded in the external device 15 connected via the interface unit 14 in accordance with the operation of the operation unit 5 by the user, and with respect to the read out encoded music data The music processing unit 10 sequentially performs decoding processing, digital-analog conversion processing, amplification processing, and the like to obtain a music signal, and music based on the music signal is output from the music output unit 11.

  Further, the control unit 2 performs an analog-digital conversion process, an equalizing process on the music signal input to the music processing unit 10 from the external music input unit 16 according to the operation of the operation unit 5 by the user. A music signal is obtained by sequentially performing digital-analog conversion processing, amplification processing, and the like, and music based on the music signal is output from the music output unit 11. As described above, the content recording / playback apparatus 1 can play back 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 addition, the control unit 2 performs an analog-digital conversion process on the 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, Encoding processing is performed by the processing unit 10, and the encoded music data obtained as a result is recorded on the internal recording medium 8 by the internal recording medium driving unit 7. As described above, the content recording / playback apparatus 1 can record the music content input from the music input unit 16. Incidentally, if 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 acquired from the content distribution server described above, this music The content may be reproduced in the same manner as the music content acquired from the content distribution server and recorded on the internal recording medium 8.

  Further, the control unit 2 reads out music data recorded on the external recording medium 13 or the external device 15 in accordance with the operation of the operation unit 5 by the user, and the music processing unit 10 encodes the read music data. At this time, encrypted music data is obtained by encrypting with the encryption key given from the right processing unit 9, and this encrypted music data is associated with the right information generated by the right processing unit 9 at this time To the internal recording medium 8.

  Further, the control unit 2 sequentially performs analog-digital conversion processing, encoding processing, and the like on 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. At this time, the encrypted music data is obtained by encrypting with the encryption key given from the right processing unit 9, and the encrypted music data is associated with the right information generated by the right processing unit 9 at this time. To the internal recording medium 8.

  As described above, the content recording / playback apparatus 1 can record the music content recorded in the external recording medium 13 or the external device 15 or the music content input from the music input unit 16 in the internal recording medium 8. Yes. Incidentally, each of the encryption of music data and the association of right information performed at the time of recording may be performed as necessary (for example, according to the operation of the operation unit 5 by the user). The encoded music data read from the external recording medium 13 or the external device 15 can be recorded as it is in the built-in recording medium 8 without associating information, and the music signal input from the music input unit 16 can be recorded. Then, the music processing unit 10 can sequentially perform analog-digital conversion processing, encoding processing, and the like to obtain encoded music data, and the encoded music data can be directly recorded on the built-in recording medium 8.

  Further, the control unit 2 reads out the encrypted music data and its right information recorded in the built-in recording medium 8 or reads out the encoded music data according to the operation of the operation unit 5 by the user, and reads them out to the external recording medium 13. Or to the external device 15. As described above, the content recording / playback apparatus 1 can transfer the encoded music content recorded in the internal recording medium 8 to the outside.

  Further, the control unit 2 sends display data to the display processing unit 17 based on the execution results of various programs read from the storage unit 3 (for example, acquisition, playback, recording, transfer, etc. of music content). The display processing unit 17 displays a screen based on the display data sent from the control unit 2 on the external display unit 18. In this way, the content recording / playback apparatus 1 is configured to allow the user to visually recognize various screens related to acquisition, playback, recording, and transfer of music content via 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 / playback apparatus 1 via a predetermined cable, or the housing of the content recording / playback apparatus 1. It may be directly attached to and connected internally.

  Next, a case where the configuration of the content recording / playback apparatus 1 described above is realized with a specific hardware configuration will be described with reference to FIG. In this content recording / reproducing apparatus 1, a CPU (Central Processing Unit) 20 and hardware are connected via a bus 21, and various programs read out from an EEPROM (Electronically Erasable and Programmable Read Only Memory) 22 by the CPU 20 are stored in a RAM (RAM). Random Access Memory) 23 is executed and executed to perform overall control and perform various processes.

  That is, the CPU 20 performs an operation for acquiring music content distributed from, for example, a content distribution server (not shown) on the network NT via the operation key 24 provided on the housing or the like of the content recording / playback apparatus 1. If it is recognized, a request signal for requesting distribution of music content is transmitted to the content distribution server on the network NT via the network interface 25 accordingly.

  When the content distribution server receives the request signal from the content recording / playback apparatus 1, in response to this, the content distribution server performs a billing process for charging the user of the content recording / playback apparatus 1 for the fee associated with the distribution of the requested music content. At the same time, the encrypted music data corresponding to the requested music content and the right information indicating the right to use the music content are transmitted to the content recording / reproducing apparatus 1 via the network NT. Incidentally, the right information in this case includes, for example, data that is a source of a decryption key for decrypting encrypted music data (so-called decryption key seed), content usage conditions that indicate the number of reproducible times and the number of times that music content can be transferred, In addition, a content usage state or the like indicating the number of times the music content has been actually reproduced or transferred is described.

  When the CPU 20 of the content recording / reproducing apparatus 1 receives the encrypted music data and the right information transmitted from the content distribution server via the network interface 25, the CPU 20 records them on the hard disk drive 26.

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

  Thereafter, when the CPU 20 recognizes that the user has issued a playback instruction for the music content recorded on the hard disk drive 26 via the operation key 24, the CPU 20 responds accordingly with the encrypted music data corresponding to the music content and The rights information is read from the hard disk drive 26 and sent to the rights processing and music processing module 27.

  The right processing and music processing module 27 is a hardware module that is hidden from outside the module, and is connected to the bus 21 outside the module via the local bridge 27A, and is connected to the DSP (Digital Signal) connected to the local bridge 27A. Processor) 27B is connected to an analog processing circuit 28 outside the module. Then, when the encrypted firmware for DSP 27B recorded in the hard disk drive 26 is read and supplied by the CPU 20, the rights processing and music processing module 27 takes this into the DSP 27B via the local bridge 27A. The DSP 27B decrypts the data and temporarily stores it in the RAM 27C. When the DSP 27B executes the firmware temporarily stored in the RAM 27C, the processing of the right processing unit 9 of the content recording / reproducing apparatus 1 described above and the music processing unit 10 are performed. The same processing as the digital processing is performed. The right processing and music processing module 27 has an EEPROM 27D that can be accessed by the DSP 27B, and stores confidential information and the like to be concealed from outside the module in the EEPROM 27D.

  That is, the rights processing and music processing module 27 inputs the encrypted music data and the rights information sent from the hard disk drive 26 to the DSP 27B via the local bridge 27A. The DSP 27B confirms whether or not the right information is valid, and if it is confirmed that the right information is valid, the DSP 27B uses (reproduces in this case) the encrypted music data sent together with the right information. to approve. The DSP 27B generates a decryption key for the encrypted music data based on the right information, obtains the music data by decrypting the encrypted music data with the decryption key, and further performs a decoding process or the like on the music data. After digital processing, 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, and sends the music signal to the speaker. 29 outputs music based on the music signal.

  As described above, the content recording / playback apparatus 1 can play back the music content recorded on the hard disk drive 26.

  Further, the CPU 20 of the content recording / reproducing apparatus 1 reads out music data recorded on a CD 31 loaded in a CD (Compact Disc) drive 30 in response to the operation of the operation key 24 by the user, and the read music data is read out. After the digital processing by the right processing and music processing module 27, the analog processing circuit 28 performs analog processing such as digital-analog conversion processing and amplification processing to obtain a music signal, and the music based on the music signal is sent to the speaker 29. Output from.

  Further, the CPU 20 reads out the encoded music data recorded in the USB device 33 connected via the USB (Universal Serial Bus) interface 32 in accordance with the operation of the operation key 24 by the user, and this read out encoded music data. On the other hand, after digital processing such as decoding processing is performed by the right processing and music processing module 27, a music signal is obtained by further performing analog processing such as digital-analog conversion processing and amplification processing by the analog processing circuit 28. Music based on the music signal is output from the speaker 29.

  Further, the CPU 20 performs analog processing such as analog-digital conversion processing by the analog processing circuit 28 on the music signal input from the tuner 34 or the external input terminal 35 to the analog processing circuit 28 in accordance with the operation of the operation key 24 by the user. After that, the right processing and music processing module 27 performs digital processing such as equalizing processing, and then the analog processing circuit 28 performs analog processing such as digital-analog conversion processing to obtain a music signal. The music based on is output from the speaker 29.

  As described above, the content recording / playback apparatus 1 can play back music content recorded on the CD 31 or the USB device 33 or music content input from the tuner 34 or the external input terminal 35. Incidentally, if the music content recorded on the CD 31 or the USB device 33 is encrypted music data associated with the right information, such as the music content acquired from the content distribution server described above, this music content is What is necessary is just to reproduce | regenerate like the music content acquired from the content delivery server and recorded on the hard disk drive 26.

  Further, the CPU 20 reads out music data recorded on the CD 31 or the USB device 33 in accordance with the operation of the operation key 24 by the user, and performs encoding processing on the read music data by the right processing and music processing module 27. At the same time, encrypted music data is obtained by encrypting with the encryption key generated by the right processing and music processing module 27, and the encrypted music data and the right processing and music processing module 27 are generated at this time. The rights information is recorded in association with the hard disk drive 26.

  Further, the CPU 20 performs analog processing such as analog-to-digital conversion processing by the analog processing circuit 28 on the music signal input to the analog processing circuit 28 from the tuner 34 or the external input terminal 35 in accordance with the operation of the operation key 24 by the user. After that, the digital processing such as encoding processing is performed by the right processing and music processing module 27, and at this time, encrypted music data is obtained by encrypting with the encryption key generated by the right processing and music processing module 27. The encrypted music data and the right information generated by the right processing and music processing module 27 at this time are associated with each other and recorded in the hard disk drive 26.

  As described above, the content recording / playback apparatus 1 can record 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 on the hard disk drive 26. . Incidentally, each of the encryption of music data and the association of right information performed at the time of recording may be performed as necessary (for example, according to the operation of the operation key 24 by the user). For example, the content recording / playback apparatus 1 can encode the music data read from the CD 31 and record it in the hard disk drive 26 without performing encryption and associating the right information, or the code read from the USB device 33. The digitized music data can be recorded in the hard disk drive 26 as it is. The content recording / playback apparatus 1 encodes the music signal input from the tuner 34 or the external input terminal 35 by sequentially performing analog processing, digital processing, and the like in the analog processing circuit 28 and the right processing and music processing module 27. It is also possible to obtain music data and record the encoded music data on the hard disk drive 26 as it is.

  Further, the CPU 20 reads the encrypted music data and the right information recorded in the hard disk drive 26 or reads the encoded music data according to the operation of the operation key 24 by the user, and records them in the CD 31 or the USB device 33. To do. As described above, the content recording / playback apparatus 1 can also transfer the music content recorded on the hard disk drive 26 to the outside.

  Further, the CPU 20 sends display data to the display controller 36 based on the execution results of various programs read from the EEPROM 22 (for example, acquisition, reproduction, recording, transfer, etc. of music content). The display controller 36 displays a screen based on the display data sent from the CPU 20 on the external display 37. In this way, the content recording / playback apparatus 1 is configured to allow the user to visually recognize various screens related to acquisition, playback, recording, and transfer of music content via the display 37.

  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 / playback apparatus 1 via a predetermined cable, or the casing of the content recording / playback apparatus 1 It may be directly attached to and connected internally.

  Incidentally, the CPU 20 of the content recording / playback apparatus 1 corresponds to the control unit 2 (FIG. 2) described above, the EEPROM 22 corresponds to the storage unit 3, the RAM 23 corresponds to the temporary storage unit 4, and the operation keys 24 correspond to the operation unit 5. The network interface 25 corresponds to the communication unit 6, the hard disk drive 26 corresponds to the built-in recording medium driving unit 7 and the built-in recording medium 8, and the right processing and music processing module 27 and the analog processing circuit 28 are the right processing unit. 9 and the music processing unit 10, the CD drive 30 corresponds to the external recording medium driving unit 12, the USB interface 32 corresponds to the interface unit 14, and the display controller 36 corresponds to the display processing unit 17.

  In addition to such a configuration, in the case of the content recording / reproducing apparatus 1, the DSP 27B of the right processing and music processing module 27 is an encrypted compression encoding program (hereinafter referred to as an encoding program) stored in the hard disk drive 26 in advance. By decoding various programs such as a decompression decoding program (hereinafter referred to as a decoding program), a sampling rate conversion program, and a filtering program with the DSP 27B and appropriately developing them in the RAM 27C, an encoding process, a decoding process, Data processing such as sampling rate conversion processing and filtering processing is executed. Further, the DSP 27B decrypts the encrypted data processing control program stored in advance in the hard disk drive 26 by the DSP 27B and develops it in the RAM 27C, so that these encoding processing, decoding processing, sampling rate are performed according to the data processing control program. Data processing such as conversion processing and filtering processing is controlled.

  Further, the DSP 27B performs ATRAC3 (Adaptive Transform Acoustic Coding 3), AAC (Advanced Audio Coding), WMA (Windows (registered trademark) Media Audio), RealAudio G2 Music Codec, MPEG (Moving Picture Experts Group) 1 Audio Layer as encoding processing. 3. In accordance with an encoding program according to various compression / decompression methods (hereinafter referred to as codec format) such as MPEG2 Audio Layer 3, etc., encoding processing according to ATRAC3, encoding processing according to MPEG1 Audio Layer 3, etc. Multiple types of encoding processes with different codec formats can be executed. Furthermore, the DSP 27B can execute a plurality of types of decoding processing according to decoding programs corresponding to these various codec formats.

  The DSP 27B can execute reproduction data processing for reproducing encoded music data recorded in the hard disk drive 26, for example, as such data processing. Further, as such data processing, the DSP 27B performs recording data processing when encoding music data input from the external input terminal 35 or the tuner 34 via the analog processing circuit 28 and recording it in the hard disk drive 26. You can also. Further, as such data processing, the DSP 27B converts the codec format of the encoded music data transferred from the hard disk drive 26 to the USB device 33, for example (that is, converts the music data already encoded in a predetermined codec format to, for example, the USB Data conversion for format conversion at the time of re-encoding with another codec format that can be processed by the device 33 can also be executed.

  Therefore, hereinafter, various data processing executed by the DSP 27B will be described in detail based on the circuit configurations shown in FIGS. However, for the convenience of explanation, the circuit configuration shown in FIG. 4 can be realized by the DSP 27B according to the above-described various programs in the data processing together with the input buffer memory 50 and the output buffer memory 51 as hardware provided in the DSP 27B. Various functions are shown as function blocks. In this case, as a functional block, there is a data processing control unit 52 indicating a control function of data processing executed according to the data processing control program. Further, as such functional blocks, there is a data processing block 53 that actually processes music data, and the data processing block 53 includes a decoder section 54 indicating a decoding processing function executed according to the decoding program and a sampling rate conversion program. A sampling rate converter 55 indicating the function of the sampling rate conversion process to be executed, a de-emphasis filter part 56 indicating the function of the filtering process executed according to the filtering program, and an encoder part 57 indicating the function of the encoding process executed according to the encoding program It is subdivided into.

  For the encoder unit 57 shown in FIG. 5, the functions of a plurality of types of encoding processes with different codec formats that can be realized by the DSP 27B are shown as a plurality of encoders 57A to 57N as function blocks. Further, for the decoder unit 54 shown in FIG. 6, the functions of a plurality of types of decoding processes with different codec formats that can be realized by the DSP 27B are shown as a plurality of decoders 54A to 54N as functional blocks. The data processing control unit 52, which is a partial function of the DSP 27B, controls the encoder unit 57 and the decoder unit 54 according to the codec format applied to the music data to be processed, and uses encoders 57A to 57N used for data processing. The decoders 54A to 54N are switched.

  First, the CPU 20 packetizes the encoded music data to be reproduced or the encoded music data to be converted at the time of reproduction of the music contents or conversion of the codec format for the music contents, thereby causing the packet PC as shown in FIG. Is generated. The packet PC is generated by using the encoded music data to be reproduced and the encoded music data to be converted as the packet data PD, and the packet header PH is added to the head of the packet data PD.

  In this case, for the packet header PH, the CPU 20 sorts the codec format applied to the packet data PD (that is, music data), the sampling rate and bit rate during data processing, the number of channels indicating stereo and monaural, filtering Processing condition setting information indicating processing conditions to be set for each unit in the data processing block 53 in the DSP 27B, such as presence / absence of processing execution instruction, is stored. In addition, the CPU 20 determines whether or not there is an instruction to execute the data size of the packet data PD (hereinafter referred to as the input data size) or termination processing for accurately processing the packet data PD up to the termination for the packet header PH. Control information used by the data processing control unit 52 to control each unit in the data processing block 53 such as the presence / absence of initialization of processing conditions set in each unit of the DSP 27B is also stored.

  Incidentally, the type of codec format included in the processing condition setting information indicates the codec format used for the encoding process of the packet data PD (that is, encoded music data). The type of codec format also indicates a codec format to be applied when the packet data PD is encoded again by format conversion. When generating the packet PC, the CPU 20 can also divide the encoded music data for one song into a plurality of parts, each of which can be used as packet data PD. One packet data PD can also be used. However, in the following description, a case will be described in which, for example, encoded music data for one song is directly used as one packet data PD.

  The CPU 20 sends the packet PC to the DSP 27B and temporarily records it in the input buffer memory 50. At this time, the CPU 20 gives a processing start command to the data processing control unit 52. When the data processing control unit 52 receives a processing start command given from the CPU 20, the data processing control unit 52 starts reproduction data processing and format conversion data processing accordingly. Then, the data processing control unit 52 reads the processing condition setting information and the control information from the packet header PH of the packet PC temporarily recorded in the input buffer memory 50 at that time, and in the data processing block 53 according to the read processing condition setting information. Processing conditions are set for the decoder unit 54, the sampling rate converter unit 55, the de-emphasis filter unit 56, and the encoder unit 57, respectively.

  Incidentally, the data processing control unit 52, when newly executing reproduction data processing or format conversion data processing, or when changing processing conditions, etc., according to the control information, these decoder unit 54, sampling rate converter unit 55. After initializing the de-emphasis filter unit 56 and the encoder unit 57, processing conditions are set. Further, the data processing control unit 52 provides the decoder unit 54 and the encoder unit 57 with decoders 54A to 54N and encoders 57A to 57N used for decoding processing and encoding processing according to the codec format applied to the packet data PD to be processed. Switch. However, since the data processing control unit 52 does not encode the packet data PD when executing the reproduction data processing, the data processing control unit 52 stops the processing of the encoder unit 57 only at this time. In addition, the data processing control unit 52 does not detect the execution instruction of the filtering process in the processing condition setting information regardless of whether the data process for reproduction or the data process for format conversion is executed. This process is also stopped.

  In this state, the data processing control unit 52 divides the packet data PD from the input buffer memory 50 for each data processing unit corresponding to the codec format applied thereto, and inputs it to the data processing block 53 (in this case, the decoder Part 54). Accordingly, in the data processing block 53, the decoder unit 54 decodes the packet data PD by the decoders 54A to 54N corresponding to the codec format applied thereto, and sends the obtained processing data to the sampling rate converter unit 55. . The sampling rate converter unit 55 performs a sampling rate conversion process on the processing data given from the decoder unit 54 and sends the obtained processing data to the de-emphasis filter unit 56. The de-emphasis filter unit 56 performs a filtering process on the processing data given from the sampling rate converter unit 55 and sends the obtained processing data to the encoder unit 57. The encoder unit 57 encodes the processing data given from the de-emphasis filter unit 56 by encoders 57A to 57N corresponding to the codec format applied to the packet data PD. Incidentally, in the data processing block 53, when the processing of the de-emphasis filter unit 56 and the encoder unit 57 is stopped in accordance with the setting of processing conditions and the type of data processing, the processing data obtained in the preceding stage is processed in the data processing block 53. The emphasis filter unit 56 and the encoder unit 57 are passed as they are.

  Then, the data processing control unit 52 outputs the processing data (that is, music data in this case) finally obtained as a result of processing the packet data PD for the playback in the data processing block 53 when executing the playback data processing. The data is sent to the analog processing circuit 28 as it is. In addition, the data processing control unit 52 performs processing of the packet data PD by the data processing block 53 when the format conversion data processing is executed. As a result, the data processing control unit 52 finally obtains the processing data (that is, the encoded format in this case). The converted encoded music data) is sent as output data to the CPU 20 via the output buffer memory 51.

  Further, the CPU 20 sets the processing condition setting information and control information basically the same as the processing condition setting information and control information stored in the packet header PH of the packet PC at the time of recording the music content as DSP 27B as setting and control data. To the data processing control unit 52. However, the CPU 20 obtains the input data size for the music data according to the recording time for the music data to be recorded designated by the user, for example, and adds the input data size to the control information. Further, the CPU 20 indicates the codec format applied to the encoding process of the music data to be recorded, depending on the type of codec format applied to the music data added to the processing condition setting information. Then, the CPU 20 gives a processing start command to the data processing control unit 52 together with the setting and control data.

  When the data processing control unit 52 receives the processing start command together with the setting and control data given from the CPU 20 at this time, the data processing control unit 52 starts the recording data processing accordingly. Then, the data processing control unit 52 performs the sampling rate converter unit 55, the de-emphasis filter unit 56, and the encoder unit 57 in the data processing block 53 in the same manner as described above according to the processing condition setting information included in the setting and control data at that time. Set the processing conditions.

  Incidentally, the data processing control unit 52, when newly executing the recording data processing, or when changing the processing condition, etc., according to the control information included in the setting and control data, The emphasis filter unit 56 and the encoder unit 57 are once initialized. Further, the data processing control unit 52 switches the encoders 57A to 57N used for the encoding process in accordance with the codec format applied to the music data to be recorded with respect to the encoder unit 57. However, when executing the recording data processing, the data processing control unit 52 does not decode the music data to be recorded, so the processing of the decoder unit 54 is stopped at this time. In addition, when executing the recording data processing, the data processing control unit 52 also stops the processing of the de-emphasis filter unit 56 when the execution instruction of the filtering processing is not detected in the processing condition setting information.

  In this state, the data processing control unit 52 inputs music data to be recorded supplied to the DSP 27B from the external input terminal 35 or the tuner 34 via the analog processing circuit 28 to the data processing block 53 (in this case, the decoder unit 54). Are input to the sampling rate converter 55 as they are). The sampling rate converter unit 55 performs a sampling rate conversion process on the music data given through the decoder unit 54 and sends the obtained processed data to the de-emphasis filter unit 56. The de-emphasis filter unit 56 performs a filtering process on the processing data provided from the sampling rate converter unit 55, and sends the obtained filtering data to the encoder unit 57. The encoder unit 57 encodes the processing data provided from the de-emphasis filter unit 56 by encoders 57A to 57N according to the codec format applied to the music data. Incidentally, in the data processing block 53, when the processing of the de-emphasis filter unit 56 is stopped according to the setting of the processing conditions, the processing data obtained in the preceding stage is passed through the de-emphasis filter unit 56 as it is. When the data processing control unit 52 executes the data processing for recording, the data processing block 53 processes the music data to be recorded in the data processing block 53. As a result, the data processing control unit 52 finally obtains processed data (that is, encoded music in this case) Data) is output as output data to the CPU 20 via the output buffer memory 51.

  By the way, in the various codec formats described above, a data processing unit when the packet data PD and music data are subjected to codec processing and encoding processing is uniquely defined. The various codec formats also stipulate that the processing data of each individual data processing unit is encoded and decoded using the processing data of the subsequent data processing unit and the like. Therefore, the decoder unit 54, the sampling rate converter unit 55, the de-emphasis filter unit 56, and the encoder unit 57 each have a buffer memory dedicated to its own processing. Incidentally, in the decoder unit 54 and the encoder unit 57, each of the decoders 54A to 54N and the encoders 57A to 57N has a buffer memory dedicated to its own processing. Then, the decoder unit 54, the sampling rate converter unit 55, the de-emphasis filter unit 56, and the encoder unit 57 each store the processing data of one or a plurality of data processing units in its own dedicated buffer memory. Processing data of one or more data processing units is processed.

  However, when the packet data PD and music data are input to the data processing block 53 until the end, the decoder unit 54 and the encoder unit 57 perform decoding processing and encoding processing together with the processing data of the data processing unit of the end portion. Due to the lack of processing data in other data processing units, the processing data at the end portion cannot be completely decoded and encoded, and remains in the buffer memory. Further, in the sampling rate converter unit 55 and the de-emphasis filter unit 56, if processing data that cannot be processed by the preceding decoder unit 54 remains, the processing data used for its own processing is insufficient due to the influence, and as a result, Similarly, the processing data at the end portion cannot be processed and remains in the buffer memory.

  Therefore, when the CPU 20 processes the packet data PD for one song or the music data for a predetermined input data size designated for recording alone or continuously as the last piece of the other packet data PD or music data, In order to process the packet data PD for one song and the music data for a predetermined input data size designated for recording to the end, an instruction to execute the end process is included in the control information. As a result, as shown in FIG. 8, when the data processing control unit 52 inputs the packet data PD1 and music data to the data processing block 53 to the end thereof, the data processing control unit 52 responds to the end processing execution instruction included in the control information. The decoder unit 54, the sampling rate converter unit 55, the de-emphasis filter unit 56, and the encoder unit 57 are controlled so that all the internal processing data is processed and output. As a result, the data processing control unit 52 supplements the deficient data with “0” data for the end of the packet data PD1 or the music data, for example, so that the decoder unit 54, the sampling rate converter unit 55, the de-emphasis filter The unit 56 and the encoder unit 57 can process the packet data PD1 and the music data up to the end, thus generating the output data OD1.

  Further, when the CPU 20 continuously processes a plurality of packet data PD and a plurality of music data, the CPU 20 does not particularly include an instruction to execute the termination process for the control information while the data processing is continued. . However, as shown in FIG. 9, the data processing control unit 52 sends the packet data PD3 and music data other than the last of the plurality of continuous packet data PD2 and PD3 and the plurality of music data to the data processing block 53. Even if the control information does not include an instruction to execute the termination process when the input is made to the end, the data processing block 53 is next processed until output data corresponding to the packet data PD or music data is obtained. The data processing block 53 is controlled so that the decoder unit 54, the decoder unit 54, the sampling rate converter unit 55, the de-emphasis filter unit 56 and the encoder unit 57 are operated as they are. To do. As a result, the data processing control unit 52 can generate the output data OD1 with the next packet data PD3 or data at the beginning of the music data at the end of the packet data PD1 or music data.

  Here, in practice, in the DSP 27B, the data processing control unit 52 starts the reproduction data processing control processing procedure RT1 shown in FIG. 10 when reproducing the music content. When starting the reproduction data processing control processing procedure RT1, the data processing control unit 52 writes the packet PC sent out from the CPU 20 in the input buffer memory 50 and the reproduction data processing given from the CPU 20 in step SP1. The process start command is received, and the process proceeds to the next step SP2.

  In step SP2, the data processing control unit 52 reads the packet header PH of the packet PC written in the input buffer memory 50. Then, the data processing control unit 52 detects the contents of the processing condition setting information and the control information in the packet header PH, and proceeds to the next step SP3. In step SP3, the data processing control unit 52 initializes the decoder unit 54, the sampling rate converter unit 55, and the de-emphasis filter unit 56 of the data processing block 53 according to the processing condition setting information as necessary, The processing conditions are set, and the process proceeds to the next step SP4. In step SP4, the data processing control unit 52 appropriately uses setting conditions such as the sampling rate and bit rate in the processing condition setting information based on the input data size in the control information, and processes the packet data PD to be processed at this time. (That is, the packet data PD of the packet PC written in the input buffer memory 50 at this time point) The output data size of the output data obtained as a result of processing the data for reproduction from the front end to the end is calculated, and the next step SP5 is performed. Move.

  In step SP5, the data processing control unit 52 divides the packet data PD in the input buffer memory 50 into predetermined data processing units and inputs them to the data processing block 53 (that is, the decoder unit 54), and proceeds to the next step SP6. . Here, when the data processing control unit 52 starts to input the packet data PD in the input buffer memory 50 to the data processing block 53, the data processing control unit 52 monitors the data size of the packet data PD corresponding to the data input to the data processing block 53. ing. Accordingly, in step SP6, the data processing control unit 52 determines whether or not the data size of the packet data PD input to the data processing block 53 has reached the input data size. If a negative result is obtained in step SP6, this means that the data from the beginning to the end of the packet data PD of the packet PC temporarily recorded in the input buffer memory 50 has not yet been input to the data processing block 53. Yes. Therefore, the data processing control unit 52 proceeds to the next step SP7 at this time.

  In step SP7, the data processing control unit 52 causes the data processing block 53 to execute reproduction data processing on the packet data PD, and proceeds to the next step SP8. In step SP8, the data processing control unit 52 sends the processing data obtained as a result of executing the data processing for reproduction on the packet data PD in the data processing block 53 to the analog processing circuit 28 as output data, and next step SP9. Move on.

  Here, the data processing control unit 52 monitors the data size of the output data for the amount output from the data processing block 53 at this time. Accordingly, in step SP9, the data processing control unit 52 determines whether or not the data size of the output data output from the data processing block 53 has reached the previously calculated output data size. If a negative result is obtained in step SP9, this indicates that the reproduction data processing of the packet data PD of the packet PC temporarily recorded in the input buffer memory 50 has not been completed from the beginning to the end. Therefore, the data processing control unit 52 returns to step SP5 at this time. Therefore, after that, the data processing control unit 52 cyclically repeats the processing from step SP5 to step SP9 until a positive result is obtained in any one of step SP6 and step SP9. Thus, the data processing control unit 52 sequentially inputs the packet data PD in the input buffer memory 50 to the data processing block 53 for each predetermined data processing unit, processes the packet data PD for reproduction, and obtains the result. The output data is sent to the analog processing circuit 28.

  When a positive result is obtained in step SP6 described above, this indicates that the data from the beginning to the end of the packet data PD of the packet PC temporarily recorded in the input buffer memory 50 is input to the data processing block 53. Therefore, the data processing control unit 52 moves to step SP10 at this time. In step SP10, the data processing control unit 52 determines whether or not a termination processing execution instruction has been detected based on the control information. If a negative result is obtained in step SP10, this indicates that the data processing control unit 52 has not detected an execution instruction for termination processing in the previous step SP2. That is, such a negative result indicates that a plurality of packet data PD given from the CPU 20 is continuously processed for reproduction data. Therefore, the data processing control unit 52 returns to step SP1 at this time.

  Therefore, the data processing control unit 52 receives a processing start command for the packet data PD to be processed next for data to be reproduced from the CPU 20, and continues to temporarily record it in the input buffer memory 50 at this time, similarly to the processing in steps SP2 to SP4. After sequentially executing the processing corresponding to the next packet data PD, the process proceeds to step SP5. In step SP5, the data processing control unit 52 then divides the next packet data PD in the input buffer memory 50 into predetermined data processing units and inputs them to the data processing block 53 (that is, the decoder unit 54). The process proceeds to step SP6. In step SP6, the data processing control unit 52 determines whether or not the data size of the next packet data PD input to the data processing block 53 at this time has reached the input data size corresponding to the next packet data PD. To do. In step SP6, when the data processing control unit 52 obtains a negative result, the data processing control unit 52 proceeds to next step SP7. As a result, in step SP7, the data processing control unit 52 executes the reproduction data processing in the data processing block 53 by continuing the head of the next packet data PD at the end of the previous packet data PD. The output data obtained as a result of the data processing for reproduction is sent to the analog processing circuit 28, and the process proceeds to step SP9 again.

  Here, when the data processing control unit 52 obtains a negative result again as described above in step SP9, the process returns to step SP5. As a result, the data processing control unit 52 repeatedly executes the processing from step SP5 to step SP9 as appropriate, and thereafter, the data processing until the data size of the output data reaches the output data size corresponding to the previous packet data PD. The block 53 is controlled. As a result, the data processing control unit 52 sets the data size of the output data output from the data processing block 53 by the reproduction data processing for the previous packet data PD to the output data size corresponding to the previous packet data PD. If a positive result is obtained by arriving, the process moves to the next step SP11. In step SP11, the data processing control unit 52 performs the data processing for reproduction on the previous packet data PD together with the data size of the output data (that is, the final data size of the monitored output data). After notifying that the process has been completed, the process proceeds to the next step SP12. In step SP12, the data processing control unit 52 determines whether or not the next packet data PD is being processed for reproduction. In step SP12, if the data processing control unit 52 obtains an affirmative result because it is in the middle of processing the data for reproduction of the next packet data PD continuously to the previous packet data PD, it returns to step SP5. In this way, the data processing control unit 52 continuously processes the plurality of packet data PDs for reproduction while the plurality of packet data PDs are continuously given from the CPU 20, and as a result. The obtained output data is sent to the analog processing circuit 28.

  By the way, if a positive result is obtained in step SP10 described above, this indicates that the data processing control unit 52 has detected the execution instruction of the termination process in the previous step SP2. In other words, the positive result indicates that the packet data PD that is being processed for reproduction at this time is one that is for data processing for reproduction alone or that is located at the end of a plurality of consecutive packet data PDs. Represents. Therefore, the data processing control unit 52 proceeds to the next step SP13 at this time. In step SP13, the data processing control unit 52 controls and operates the data processing block 53 so that the data processing block 53 processes and outputs all the internal processing data for reproduction, thereby terminating the end of the packet data PD. The part is terminated, and the output data obtained as a result is sent to the analog processing circuit 28, and the process proceeds to step SP11.

  Accordingly, in step SP11, the data processing control unit 52 sets the data size for the output data obtained by terminating the termination portion of the packet data PD in step SP13 to the data size of the output data before executing the termination processing. to add. As a result, the data processing control unit 52 obtains the data size of the entire output data obtained by processing the data for reproduction from the beginning to the end of the packet data PD. The data processing control unit 52 notifies the CPU 20 that the reproduction data processing for the packet data PD is completed together with the data size of the output data, and proceeds to the next step SP12. By the way, if a negative result is obtained in step SP12, this indicates that all the reproduction data processing for the packet data PD has been completed. Therefore, the data processing control unit 52 moves to the next step SP14 at this time, and ends the reproduction data processing control processing procedure RT1.

  In the DSP 27B, the data processing control unit 52 starts the recording data processing control processing procedure RT2 shown in FIG. 11 when recording the music content. When the recording data processing control processing procedure RT2 is started, the data processing control unit 52 receives the setting and control data given from the CPU 20 and a recording data processing processing start command in step SP21, and performs the next step. Move on to SP22.

  In step SP22, the data processing control unit 52 detects the contents of the processing condition setting information and control information included in the setting and control data, and proceeds to the next step SP23. In step SP23, the data processing control unit 52 initializes the sampling rate converter unit 55, the de-emphasis filter unit 56, and the encoder unit 57 of the data processing block 53 according to the processing condition setting information as necessary. The processing conditions are set and the process proceeds to the next step SP24. In step SP24, the data processing control unit 52 uses the setting conditions such as the sampling rate and the bit rate in the processing condition setting information as appropriate based on the input data size in the control information, and at this time the music data to be processed ( That is, the output data size of the output data obtained as a result of processing the recording data from the front end to the end of the music data given from the analog processing circuit 28 at this time is calculated, and the process proceeds to the next step SP25.

  In step SP25, the data processing control unit 52 inputs the music data given from the analog processing circuit 28 to the data processing block 53 (that is, the sampling rate converter unit 55), and proceeds to the next step SP26. Here, when the data processing control unit 52 starts to input the music data supplied from the analog processing circuit 28 to the data processing block 53, the data processing control unit 52 monitors the data size of the music data input to the data processing block 53. Yes. Therefore, in step SP26, the data processing control unit 52 determines whether or not the data size of the music data input to the data processing block 53 has reached the input data size. If a negative result is obtained in step SP26, this means that the data from the beginning to the end of the music data to be processed has not yet been input to the data processing block 53. Therefore, the data processing control unit 52 proceeds to the next step SP27 at this time.

  In step SP27, the data processing control unit 52 causes the data processing block 53 to execute recording data processing on the music data, and proceeds to the next step SP28. In step SP28, the data processing control unit 52 causes the processing data obtained as a result of executing the recording data processing on the music data in the data processing block 53 to be sent as output data to the CPU 20 via the output buffer memory 51, and next processed. The process proceeds to step SP29.

  Here, the data processing control unit 52 monitors the data size of the output data for the amount output from the data processing block 53 at this time. Accordingly, in step SP29, the data processing control unit 52 determines whether or not the data size of the output data output from the data processing block 53 has reached the previously calculated output data size. If a negative result is obtained in this step SP29, this indicates that the processing-target music data given from the analog processing circuit 28 has not been processed from the beginning to the end. Therefore, the data processing control unit 52 returns to step SP25 at this time. Accordingly, the data processing control unit 52 thereafter repeatedly executes the processing of step SP25 to step SP29 cyclically until a positive result is obtained in either one of step SP26 and step SP29. Thus, the data processing control unit 52 sequentially inputs the music data input from the analog processing circuit 28 to the data processing block 53, processes the music data for recording, and outputs the resulting output data to the output buffer. The data is sent to the CPU 20 via the memory 51.

  If a positive result is obtained in step SP26 described above, this indicates that the data size of the music data input from the analog processing circuit 28 to the data processing block 53 has reached the input data size. Therefore, the data processing control unit 52 moves to step SP30 at this time. In step SP30, the data processing control unit 52 determines whether or not a termination processing execution instruction has been detected based on the control information. If a negative result is obtained in step SP30, this indicates that the data processing control unit 52 has not detected an execution instruction for termination processing in the previous step SP22. That is, the negative result indicates that a plurality of music data sequentially supplied from the analog processing circuit 28 is processed for recording data. Therefore, the data processing control unit 52 returns to step SP21 at this time.

  Therefore, the data processing control unit 52 receives the setting and control data for the music data to be processed next for recording data and the processing start command from the CPU 20, and continues to the next music data in the same manner as the processing of the above-described steps SP22 to SP24. After sequentially executing the processes corresponding to the above, the process proceeds to step SP25. In step SP25, the data processing control unit 52 then inputs the next music data given from the analog processing circuit 28 to the data processing block 53 (that is, the sampling rate converter unit 55), and proceeds to the next step SP26. In step SP26, the data processing control unit 52 determines whether or not the data size of the next music data input to the data processing block 53 at this time has reached the input data size corresponding to the next music data. In step SP26, when the data processing control unit 52 obtains a negative result, the data processing control unit 52 proceeds to next step SP27. Thus, in step SP27, the data processing control unit 52 executes the recording data processing in the data processing block 53 by continuing the beginning of the next music data at the end of the previous music data, and in the subsequent step SP28, the data recording control unit 52 executes the recording data processing. The output data obtained as a result of the data processing is sent to the CPU 20 via the input buffer memory 51, and the process proceeds to step SP29 again.

  Here, if the data processing control unit 52 obtains a negative result again as described above in step SP29, it returns to step SP25. As a result, the data processing control unit 52 repeatedly executes the processing from step SP25 to step SP29 as appropriate, and thereafter the data processing block until the data size of the output data reaches the output data size corresponding to the previous music data. 53 is controlled. As a result, in the data processing control unit 52, the data size of the output data output from the data processing block 53 by the recording data processing for the previous music data reaches the output data size corresponding to the previous music data. If a positive result is obtained, the process proceeds to the next step SP31. In step SP31, the data processing control unit 52 completes the recording data processing for the previous music data together with the data size of the output data (that is, the final data size of the monitored output data). The process proceeds to the next step SP32. In step SP32, the data processing control unit 52 determines whether or not the next music data is being processed for recording data. In step SP32, the data processing control unit 52 returns to step SP25 if it obtains a positive result because the next music data is being processed for recording data following the previous music data. In this way, the data processing control unit 52 continuously processes the plurality of music data for recording while the plurality of music data is continuously supplied from the analog processing circuit 28, and as a result. The obtained output data is sent to the CPU 20 via the output buffer memory 51.

  By the way, if a positive result is obtained in step SP30 described above, this indicates that the data processing control unit 52 has detected the execution instruction of the termination process in the previous step SP22. In other words, this positive result indicates that the music data that is being processed for recording at this time is one that is for recording data processing alone, or is located at the end of a plurality of continuous music data. Yes. Therefore, the data processing control unit 52 proceeds to the next step SP33 at this time. In step SP33, the data processing control unit 52 controls and operates the data processing block 53 so that the data processing block 53 processes and outputs all of the internal processing data for recording, so that the end portion of the music data is processed. Is terminated, and the output data obtained as a result is sent to the CPU 20 via the output buffer memory 51, and the process proceeds to step SP31.

  Therefore, in step SP31, the data processing control unit 52 adds the data size for the output data obtained by terminating the termination portion of the music data in step SP33 to the data size of the output data before executing the termination processing. To do. As a result, the data processing control unit 52 obtains the data size of the entire output data obtained by processing the recording data from the beginning to the end of the music data. Then, the data processing control unit 52 notifies the CPU 20 that the recording data processing for the music data is completed together with the data size of the output data, and proceeds to the next step SP32. By the way, if a negative result is obtained in step SP32, this indicates that all the recording data processing for the music data has been completed. Accordingly, at this time, the data processing control unit 52 moves to the next step SP34 and ends the recording data processing control processing procedure RT2.

  Further, in the DSP 27B, the data processing control unit 52 starts the format conversion data processing control processing procedure RT3 shown in FIG. 12 when converting the codec format for the music content. When starting the format conversion data processing control processing procedure RT3, the data processing control unit 52 writes the packet PC sent from the CPU 20 to the input buffer memory 50 in step SP41, and also receives the format conversion data given from the CPU 20. The processing start command for data processing is received, and the process proceeds to the next step SP42.

  In step SP42, the data processing control unit 52 reads the packet header PH of the packet PC written therein from the input buffer memory 50, and detects the contents of the processing condition setting information and control information in the packet header PH. Then, the process proceeds to the next step SP43. In step SP43, the data processing control unit 52 initializes the decoder unit 54, the sampling rate converter unit 55, the de-emphasis filter unit 56, and the encoder unit 57 of the data processing block 53 as needed according to the processing condition setting information. Then, the processing conditions are set, and the process proceeds to the next step SP44. In step SP44, the data processing control unit 52 uses setting conditions such as the sampling rate and bit rate in the processing condition setting information as appropriate based on the input data size in the control information, and packet data PD to be processed at this point in time. That is, the output data size of the output data obtained as a result of processing the data for format conversion from the leading end to the end of the packet data PD of the packet PC written in the input buffer memory 50 at this time is calculated, and the next step SP45 Move on.

  In step SP45, the data processing control unit 52 divides the packet data PD in the input buffer memory 50 into predetermined data processing units and inputs them to the data processing block 53 (that is, the decoder unit 54), and proceeds to the next step SP46. . Here, the data processing control unit 52 monitors the data size of the packet data PD corresponding to the data input to the data processing block 53 as described above. Accordingly, in step SP46, the data processing control unit 52 determines whether or not the data size of the packet data PD input to the data processing block 53 has reached the input data size. If a negative result is obtained in step SP46, this means that the data from the beginning to the end of the packet data PD of the packet PC temporarily recorded in the input buffer memory 50 has not yet been input to the data processing block 53. Yes. Accordingly, the data processing control unit 52 proceeds to the next step SP47 at this time.

  In step SP47, the data processing control unit 52 causes the data processing block 53 to execute data processing for format conversion on the packet data PD, and proceeds to the next step SP48. In step SP48, the data processing control unit 52 sends the processing data obtained as a result of executing the data processing for format conversion on the packet data PD in the data processing block 53 to the CPU 20 via the output buffer memory 51 as output data. Then, the process proceeds to next step SP49.

  Here, the data processing control unit 52 monitors the data size of the output data corresponding to the amount output from the data processing block 53 in the same manner as described above. Accordingly, in step SP49, the data processing control unit 52 determines whether or not the data size of the output data output from the data processing block 53 has reached the previously calculated output data size. If a negative result is obtained in step SP49, this means that the format conversion data processing has not been completed from the beginning to the end of the packet data PD of the packet PC temporarily recorded in the input buffer memory 50. Therefore, the data processing control unit 52 returns to step SP45 at this time. Therefore, thereafter, the data processing control unit 52 repeatedly executes the processing of step SP45 to step SP49 cyclically until a positive result is obtained in either one of step SP46 and step SP49. Thereby, the data processing control unit 52 sequentially inputs the packet data PD in the input buffer memory 50 to the data processing block 53 for each predetermined data processing unit, causes the packet data PD to be processed for format conversion, and the result The obtained output data is sent to the CPU 20 via the output buffer memory 51.

  When a positive result is obtained in step SP46 described above, this indicates that the data from the beginning to the end of the packet data PD of the packet PC temporarily recorded in the input buffer memory 50 is input to the data processing block 53. Therefore, the data processing control unit 52 moves to step SP50 at this time. In step SP50, the data processing control unit 52 determines whether or not a termination processing execution instruction has been detected based on the control information. If a negative result is obtained in step SP50, this indicates that the data processing control unit 52 has not detected the termination processing execution instruction in the previous step SP42. That is, such a negative result indicates that a plurality of packet data PD given from the CPU 20 is continuously subjected to format conversion data processing. Therefore, the data processing control unit 52 returns to step SP41 at this time.

  Accordingly, the data processing control unit 52 receives a processing start command for the packet data PD to be processed next for format conversion data from the CPU 20, and continues to temporarily store the input buffer memory 50 at this time, similarly to the processing of the above-described steps SP42 to SP44. After sequentially executing processing corresponding to the recorded next packet data PD, the process proceeds to step SP45. In step SP45, the data processing control unit 52 then divides the next packet data PD in the input buffer memory 50 into a predetermined data processing unit and inputs it to the data processing block 53 (that is, the decoder unit 54). The process proceeds to step SP46. In step SP46, the data processing control unit 52 determines whether or not the data size of the next packet data PD input to the data processing block 53 at this time has reached the input data size corresponding to the next packet data PD. To do. If the data processing control unit 52 obtains a negative result in step SP46, the data processing control unit 52 proceeds to the next step SP47. As a result, in step SP47, the data processing control unit 52 executes the format conversion data processing in the data processing block 53 by continuing the head of the next packet data PD at the end of the previous packet data PD, and in the subsequent step SP48, The output data obtained as a result of the data processing for format conversion is sent to the analog processing circuit 28, and the process again proceeds to step SP49.

  Here, if the data processing control unit 52 obtains a negative result again as described above in step SP49, it returns to step SP45. As a result, the data processing control unit 52 repeatedly executes the processing from step SP45 to step SP49 as needed, and thereafter the data processing until the data size of the output data reaches the output data size corresponding to the previous packet data PD. The block 53 is controlled. As a result, the data processing control unit 52 determines that the output data size output from the data processing block 53 by the format conversion data processing for the previous packet data PD is the output data size corresponding to the previous packet data PD. If an affirmative result is obtained by reaching, the process proceeds to the next step SP51. In step SP51, the data processing control unit 52 instructs the CPU 20 to process the format conversion data for the previous packet data PD together with the data size of the output data (that is, the final data size of the output data monitored). Is finished, and the process proceeds to the next step SP52. In step SP52, the data processing control unit 52 determines whether or not the next packet data PD is being subjected to format conversion data processing. In step SP52, when the data processing control unit 52 obtains an affirmative result because the next packet data PD is being processed for data for format conversion following the previous packet data PD, the process returns to step SP45. In this way, while the plurality of packet data PDs are continuously given from the CPU 20, the data processing control unit 52 continuously processes the plurality of packet data PDs for format conversion and obtains the result. The output data is sent to the CPU 20 via the output buffer memory 51.

  By the way, if a positive result is obtained in step SP50 described above, this indicates that the data processing control unit 52 has detected the execution instruction of the termination process in the previous step SP42. That is, the positive result is that the packet data PD that has been processed for format conversion at this time is processed by the format conversion data alone, or is located at the end of a plurality of continuous packet data PD. Represents that. Therefore, the data processing control unit 52 proceeds to the next step SP53 at this time. In step SP53, the data processing control unit 52 controls and operates the data processing block 53 so that the data processing block 53 processes and outputs all the internal processing data for format conversion. The termination part is terminated, and the output data obtained as a result is sent to the CPU 20 via the output buffer memory 51, and the process proceeds to step SP51.

  Accordingly, in step SP51, the data processing control unit 52 sets the data size for the output data obtained by terminating the termination portion of the packet data PD in step SP53 to the data size of the output data before executing the termination processing. to add. As a result, the data processing control unit 52 obtains the data size of the entire output data obtained by processing the data for format conversion from the beginning to the end of the packet data PD. Then, the data processing control unit 52 notifies the CPU 20 that the format conversion data processing for the packet data PD is completed together with the data size of the output data, and proceeds to the next step SP52. If a negative result is obtained in step SP52, this indicates that all the format conversion data processing for the packet data PD has been completed. Accordingly, at this time, the data processing control unit 52 proceeds to the next step SP54 and ends the format conversion data processing control processing procedure RT3.

  By the way, when playing back music content, the content recording / playback apparatus 1 continuously plays back a plurality of music contents, repeats a single music playback mode that repeatedly plays a single music content, or plays a single music content. Music content can be played back in various playback modes, such as a single playback mode that plays back only once. The content recording / playback apparatus 1 can also change the playback mode for the music content during playback of the music content in accordance with a user instruction. For this reason, as shown in FIG. 13, the content recording / reproducing apparatus 1 continuously reproduces a plurality of music contents in the continuous reproduction mode, for example, according to a playlist in which the music contents to be reproduced and the reproduction order are registered in advance. In this case, the playback mode for one piece of music content (content 3 shown in FIG. 13) other than the last may be changed to the one-track repeated playback mode or the single playback mode by the user during the playback.

  When the CPU 20 continuously reproduces a plurality of music contents in accordance with, for example, a playlist as described above, the packet PC corresponding to the music contents other than the last of the plurality of packet PCs corresponding to the plurality of music contents is described. The termination instruction execution instruction is not stored in the packet header PH. For this reason, in the DSP 27B, during the data processing for the reproduction of the packet data PD other than the last while the data for the reproduction of the plurality of packet data PD is continuously processed according to the continuous reproduction mode for the plurality of music contents, When the continuous playback mode is changed to the one-track repeated playback mode or the single playback mode, the termination instruction is not included in the packet header PH corresponding to the packet data PD, and the CPU 20 sends the packet data. No other packet data PD is continuously given to the PD. Accordingly, the data processing control unit 52 of the DSP 27B is changed from the continuous playback mode to the one-track repeated playback mode or the single playback mode when the playback data processing control processing procedure RT1 described above is executed in such a situation. In this case, the end portion of the packet data PD in the middle of the reproduction data processing cannot be terminated.

  Accordingly, in consideration of the possibility that such a situation will occur, the CPU 20 does not store the termination instruction for the packet PC in the packet header PH of the packet PC during continuous playback of music content. When other packet data PD is not continuously processed for data subsequent to the packet data PD, it is possible to set the first termination processing automatic execution mode in which the termination portion of the previous packet data PD is automatically terminated. ing.

  That is, when the DSP 27B is set in the first termination process automatic execution mode, the data processing control unit 52 reproduces the data for reproduction shown in FIG. The process control processing procedure RT4 is started. When starting the reproduction data processing control processing procedure RT4, the data processing control unit 52 sequentially executes the processing from step SP1 to step SP9. In step SP10, the data processing control unit 52 detects that the termination processing execution instruction has been detected, that is, the packet data PD that is being processed for reproduction at this point is subjected to reproduction data processing alone, or Since it is located at the end of a plurality of continuous packet data PD, if a positive result is obtained, the process proceeds to step SP13.

  On the other hand, if the data processing control unit 52 obtains a negative result in step SP10 because it has not detected the termination processing execution instruction, it proceeds to the next step SP61. In step SP61, the data processing control unit 52 determines whether or not the next packet data PD is continuously given from the CPU 20 to the packet data PD that has been processed for reproduction data at this time. If an affirmative result is obtained in step SP61, this indicates that the playback mode has not been changed during the processing of the packet data PD for playback. Therefore, the data processing control unit 52 returns to step SP1 at this time. On the other hand, if a negative result is obtained in step SP61, this indicates that the continuous playback mode has been changed to the one-track repeated playback mode or the single playback mode during the data processing for playback of the packet data PD. ing. Therefore, the data processing control unit 52 moves to step SP13 at this time. After that, the data processing control unit 52 subsequently executes the processing of step SP13, step SP11 and step SP12, and then proceeds to the next step SP62 to end the reproduction data processing control processing procedure RT4.

  In this way, the data processing control unit 52 changes the playback mode from the continuous playback mode to the one-track repeated playback mode or the single playback mode while continuously processing the data for playback of a plurality of packet data PD. However, this can be dealt with accurately, and the end portion of the packet data PD that has been processed for reproduction data at the time of mode change can be terminated.

  By the way, in the DSP 27B, when executing the data processing for reproduction, the decoder unit 54 switches the decoders 54A to 54N used for the data processing for reproduction according to the codec format applied to the packet data PD to be processed. ing. Then, for example, when processing a plurality of packet data PD continuously for reproduction data, the CPU 20 applies the codec format applied to one packet data and the packet data PD to be processed next for reproduction data successively. If the codec format is different, the termination instruction execution instruction is stored in the packet header PH added to the one packet data PD. Therefore, when the data processing control unit 52 continuously processes data for reproduction of two packet data PDs to which different codec formats are applied, the previous packet data PD is input to the data processing block 53 for the input data size. In response to the instruction to execute the corresponding termination processing, the termination portion of the destination packet data PD is terminated. As a result, the data processing control unit 52 continues to process the next packet data PD in the other decoders 54A to 54N while the processing data of the end portion of the previous packet data PD remains in any of the decoders 54A to 54N. The decoding process is avoided.

  However, when the content recording / playback apparatus 1 is playing a plurality of music contents according to the playlist, for example, the content recording / playback apparatus 1 can change the contents of the playlist such as exchanging the music content to be played back with other music contents. Can do. Therefore, for example, as shown in FIG. 15, in the content recording / playback apparatus 1, the first music among two consecutive music contents (the contents 3 and 4 shown in FIG. 15) to which the same codec format is applied according to the playlist. During the reproduction of the content (content 3 shown in FIG. 15), the next music content (content 4 shown in FIG. 15) is another music content to which another codec format different from the codec format applied thereto is applied. There is a possibility of being exchanged for (content 5 shown in FIG. 15).

  When such a situation occurs, the data processing control unit 52 adds a packet header PH that does not store a termination processing execution instruction to the packet data PD corresponding to the previous music content. If the playback data processing control processing procedure RT1 described above is executed in such a situation, the end portion of the packet data PD in the middle of playback data processing corresponding to the previous music content cannot be terminated. Therefore, in consideration of the possibility of such a situation, the CPU 20 causes the DSP 27B to execute the data processing for reproduction on the packet data PD to which any codec format is applied during continuous reproduction of music content. When the packet data PD to be processed for reproduction next to which the same codec format as the codec format is applied is changed to other packet data PD to which another codec format is applied, the packet data being processed for the reproduction data The second end processing automatic execution mode for automatically terminating the end portion of the PD can be set.

  That is, when the DSP 27B is set to the second termination process automatic execution mode, the data processing control unit 52 is shown in FIG. 16 and FIG. The reproduction data processing control processing procedure RT5 is started. When starting the reproduction data processing control processing procedure RT5, the data processing control unit 52 sequentially executes the processing of step SP1 and step SP2, and then proceeds to step SP71. In step SP71, the data processing control unit 52 is applied to the packet data PD to be processed next for reproduction data, although it is not instructed to perform termination processing on the packet data PD being processed for reproduction. It is determined whether or not the codec format is different from the codec format applied to the packet data PD being processed for reproduction. If a negative result is obtained in step SP71, this indicates that the codec format applied to the packet data PD being processed for reproduction and the packet data PD to be processed next for reproduction data are the same. Yes. That is, this negative result indicates that the packet data PD to be processed next for reproduction data has not been changed to the packet data PD having a different codec format. Accordingly, at this time, the data processing control unit 52 proceeds to the next step SP3, and sequentially executes the processing of the steps SP3 to SP10, and subsequently the steps SP1 and SP2.

  On the other hand, when a positive result is obtained in step SP71, this indicates that the codec formats applied to the packet data PD being processed for reproduction data and the packet data PD to be processed next for reproduction data are different from each other. ing. That is, the positive result indicates that the packet data PD to be processed next for reproduction data is changed to the packet data PD having a different codec format. Therefore, the data processing control unit 52 moves to step SP13 at this time. After that, the data processing control unit 52 subsequently executes the processing of step SP13, step SP11 and step SP12, and then proceeds to the next step SP72 to end the reproduction data processing control processing procedure RT5.

  In this way, the data processing control unit 52 allows the codec in which the next packet data PD is different during the reproduction data processing for the previous packet data PD among at least two consecutive packet data PDs to which the same codec format is applied. Even if the packet data PD is changed to another packet data PD to which the format is applied, it is possible to appropriately deal with this and to terminate the end portion of the previous packet data PD.

  In the above configuration, when the DSP 27B of the content recording / playback apparatus 1 processes music data, the DSP 27B detects the input data size of the music data to be processed based on the control information provided from the CPU 20 that is the control source of the DSP 27B. The presence / absence of a termination processing execution instruction for the music data to be processed is detected. Further, the DSP 27B calculates the output data size of the output data corresponding to the input data size, inputs the music data to be processed in such a state, and executes data processing such as encoding processing and decoding processing.

  When the data size of the input music data reaches the input data size, the DSP 27B processes and outputs all the internal processing data if it detects the termination processing execution instruction. If the data size of the input music data reaches the input data size and the DSP 27B does not detect the termination processing execution instruction, the DSP 27B inputs the next music data and the output data size becomes the output data size. Data processing continues until it reaches.

  Therefore, when the content recording / playback apparatus 1 processes the last music data among a plurality of music data to be continuously processed, or when processing music data alone, the CPU 20 sends the data to the DSP 27B. By notifying the input data size of the music data and the execution instruction to the termination process, the DSP 27B can terminate the music data and obtain output data corresponding to the output data size. Further, the content recording / playback apparatus 1 particularly notifies the execution instruction of the termination process from the CPU 20 to the DSP 27B when data processing of music data other than the last of the plurality of music data to be continuously processed. Even if it is not, by notifying the input data size of the music data, when the DSP 27B inputs the music data for the input data size, the next music data is continuously input and processed. It is possible to obtain output data corresponding to the output data size by terminating the music data.

  When the DSP 27B processes the music data and obtains output data, the DSP 27B notifies the CPU 20 of the end of the data processing for the music data and also notifies the detected data size of the output data. Therefore, the CPU 20 can easily know the data size of the output data obtained by data processing of the music data, even if the CPU 20 does not process the music data.

  According to the above configuration, when the DSP 27B processes music data, the control information notified from the CPU 20 detects the presence / absence of a termination processing execution instruction for the music data and the input data size of the music data. At the same time, when the output data size corresponding to the detected input data size is calculated and the execution instruction of the termination process is detected, when the data size of the music data input to the DSP 27B reaches the input data size, the internal data If all the processing data is processed and output as output data, and the termination instruction execution instruction is not detected, the data processing is continued until the data size of the output data output from the DSP 27B reaches the output data size. I tried to do it. Thus, the content recording / playback apparatus 1 simply notifies the DSP 27B of the presence / absence of the termination process for the music data and the input data size of the music data. It is possible to execute termination processing according to the presence or absence of each. Therefore, the content recording / playback apparatus 1 can reduce the processing load on the CPU 20 during data processing of music data.

  In addition, the DSP 27B is processing data for playback when the playback mode is changed from the continuous playback mode to the one-track repeated playback mode or the single playback mode while processing a plurality of music data continuously. If the next music data is not continuously input to the DSP 27B even if the termination processing is not instructed for the music data of the current data until the data size of the output data output from the DSP 27B reaches the output data size. By continuing the data processing, the music data being processed for reproduction is automatically terminated. Therefore, the DSP 27B can almost certainly prevent the last part of the music being played back from being interrupted by the fact that the end part of the music data being played back is not processed.

  Further, the DSP 27B, during reproduction data processing for at least two consecutive music data to which the same codec format is applied, plays the music data for the next music data to other music data to which a different codec format is applied. When the change is made, the data processing is continued until the data size of the output data output from the DSP 27B reaches the output data size, even if the termination processing is not instructed for the music data in question. The music data being processed for reproduction is automatically terminated. Accordingly, the DSP 27B can almost certainly prevent the last portion of the music being played back from being interrupted because the end portion of the music data being played back is not processed at this time.

  When the music recording / playback apparatus 1 continuously processes music data, the DSP 27B detects the presence / absence of a termination process execution instruction for the music data sequentially input and the input data size of the music data, and The output data size corresponding to the detected input data size is calculated. Therefore, the content recording / reproducing apparatus 1 connects the music data before and after the CPU 20 as in the main control unit of the conventional personal computer, and adds data such as “0” to the end of the last music data. In this way, after the individual music data is terminated, the continuous music data is continuously processed by the DSP 27B without increasing the processing load by processing the data while confirming the processing status and the like. A plurality of music data can be accurately processed.

  In the content recording / playback apparatus 1, the CPU 20 gives processing conditions and control information to the DSP 27B without performing any special processing for each codec format applied to the music data to be processed. Since the music data to which is applied is processed according to the codec format, it is possible to easily cope with a large number of codec formats, so-called multi-codecs.

(3) Other Embodiments In the above-described embodiments, the case where the termination processing is performed when the music data is encoded and decoded by the DSP 27B has been described. However, the present invention is not limited to this. When music data is encrypted and decrypted by the DSP 27B, termination processing may be performed. In addition to this, the DSP 27B may execute at least one of data processing among encoding processing such as encoding processing and encryption processing, and decoding processing and decryption processing for decrypting encryption. Termination processing may be performed in the one data processing.

  In the embodiment described above, when the first and second termination processing automatic execution modes are set by the DSP 27B, the reproduction data processing control processing procedures RT4 and RT5 described above with reference to FIGS. Although the case where it executes is described, the present invention is not limited to this, and the DSP 27B may be configured to execute only the reproduction data processing control processing procedures RT4 and RT5 in advance. The DSP 27B does not execute the reproduction data processing control processing procedures RT4 and RT5 separately, but executes a reproduction data processing control processing procedure having the functions of these two reproduction data processing control processing procedures RT4 and RT5. You may do it.

  Further, in the above-described embodiment, the case where the reproduction data processing control processing procedures RT4 and RT5 described above with reference to FIGS. 14, 16 and 17 are executed at the time of reproduction of the music content has been described. Not limited to this, when recording music content or converting the codec format, the recording data processing control processing procedure or the format conversion data processing control that separately or combined the functions of the playback data processing control processing procedures RT4 and RT5. A processing procedure may be executed.

  Further, in the above-described embodiment, the case has been described in which music data is processed by the DSP 27B and terminated at that time, but the present invention is not limited to this, and the video data is processed by the DSP 27B. At that time, termination processing may be performed.

  Further, in the embodiment described above, the data processing apparatus according to the present invention is applied to the data processing apparatus 100 described above with reference to FIGS. 1 to 17, the music processing unit 10 and the DSP 27B provided in the content recording / playback apparatus 1. The present invention is not limited to this, but the present invention is not limited to this, and information recording devices such as computers, mobile phones, PDAs (Personal Digital Assistance), game machines, DVD (Digital Versatile Disc) recorders, hard disk recorders, etc. The present invention can be widely applied to various other configurations of data processing devices such as devices, data processing circuits provided in these information processing devices and recording / reproducing devices, and the like.

  Further, in the above-described embodiment, the data processing control program according to the present invention is applied to the data processing control program with respect to FIGS. 1 to 17, and the DSP 27B follows FIGS. 10 to 12, 14, and FIG. Although the reproduction data processing control processing procedures RT1, RT4, RT5, the recording data processing control processing procedure RT2, and the format conversion data processing control processing procedure RT3 described above with reference to FIGS. The present invention is not limited to this, and a data processing control program of various other configurations is applied, and a data storage control for reproduction is performed by installing the program storage medium storing the data processing control program in the content recording / reproducing apparatus 1. Processing procedure RT1, RT4, RT5, recording data Management control processing procedure RT2, it is also possible to execute the format conversion data processing control processing procedure RT3.

  Further, in the above-described embodiment, a decoding unit that decodes input encoded data, outputs the obtained decoded data, encodes the input data, and outputs the obtained encoded data As the data processing unit having at least one of the encoding units, the data processing unit 101 of the data processing device 100 described above with reference to FIGS. However, the present invention is not limited to this, and the input encoded data is decoded, and the obtained decoded data is output. At least one of a decoding unit and an encoding unit that encodes input data and outputs the obtained encoded data is provided. That way, such as data processing circuit of a hardware configuration, it is possible to widely apply various other data processing unit.

  Further, in the above-described embodiment, as the control unit for controlling the data processing unit, the control unit 102 of the data processing apparatus 100 described above with reference to FIGS. 1 to 17, the music processing unit 10 of the content recording / reproducing apparatus 1, and the DSP 27B ( In particular, the case where a data processing control program corresponding to the data processing control unit 52 is applied has been described. However, the present invention is not limited to this, such as a control circuit having a hardware configuration for controlling the data processing unit. Various other control units can be widely applied.

  Further, in the embodiment described above, FIGS. 1 to 17 are used as detection units for detecting the termination processing execution instruction for the first data input to the data processing unit and the input data size of the first data. Although the detection unit 103 of the data processing device 100 described above, the music processing unit 10 and the DSP 27B (particularly the data processing control program corresponding to the data processing control unit 52) of the content recording / playback device 1 have been described. However, the present invention is not limited to this, such as a termination circuit execution instruction for the first data input to the data processing unit, and a hardware configuration detection circuit that detects the input data size of the first data. Various other detection units can be widely applied.

  Further, in the above-described embodiment, as the calculation unit for calculating the output data size corresponding to the input data size, the calculation unit 104 of the data processing device 100 described above with reference to FIGS. The case where the processing unit 10 and the DSP 27B (particularly the data processing control program corresponding to the data processing control unit 52) are applied has been described. However, the present invention is not limited to this, and the output data size corresponding to the input data size is set. Various other calculation units such as a calculation circuit of a hardware configuration to be calculated can be widely applied.

  Furthermore, in the above-described embodiment, when the execution instruction of the termination process is detected by the detection unit, if the data size of the first data input to the data processing unit reaches the input data size, The data processing unit is controlled so that all processing data is processed and output, and when the execution instruction of the termination processing is not detected by the detection unit, the data size of the output data output from the data processing unit is output A data processing control unit that controls the data processing unit to operate the data processing unit until the data size is reached, such as the data processing control unit 105 of the data processing apparatus 100 described above with reference to FIGS. The music processing unit 10 and the DSP 27B (particularly the data processing control program corresponding to the data processing control unit 52) of the device 1 However, the present invention is not limited to this, and when the execution instruction of the termination process is detected by the detection unit, the data size of the first data input to the data processing unit is When the input data size is reached, the data processing unit is controlled to process and output all the processing data in the data processing unit, and when the detection unit has not detected the termination processing execution instruction, the data processing unit Various other data processing controls such as a data processing control circuit having a hardware configuration for controlling the data processing unit so that the data processing unit is operated until the data size of the output data to be output reaches the output data size. Parts can be widely applied.

  The present invention can be used in a data processing apparatus such as a personal computer or a mobile phone.

It is a block diagram which shows the outline | summary of the data processor by this invention. It is a block diagram which shows one Embodiment of the circuit structure by the functional block of the content recording / reproducing apparatus by this invention. It is a block diagram which shows one Embodiment of the circuit structure by the hardware block of the content recording / reproducing apparatus by this invention. It is a block diagram which shows the function structure of DSP. It is a block diagram which shows the function structure of an encoder part. It is a block diagram which shows the function structure of a decoder part. It is a basic diagram which shows the structure of a packet. It is an approximate line figure used for explanation of data processing when termination processing is instructed. It is a basic diagram with which it uses for description of a data process when the termination | terminus process is not instruct | indicated. It is a flowchart which shows the data processing control processing procedure for reproduction | regeneration. It is a flowchart which shows the recording data processing control processing procedure. It is a flowchart which shows the data processing control processing procedure for format conversion. It is an approximate line figure used for explanation of change of playback mode. It is a flowchart which shows the data processing control processing procedure for reproduction | regeneration when the 1st termination processing automatic execution mode is set. It is an approximate line figure used for explanation of change of a play list. It is a flowchart which shows the data process control process procedure (1) for reproduction | regeneration when the 2nd termination | terminus process automatic execution mode is set. It is a flowchart which shows the data processing control process procedure (2) for reproduction | regeneration when the 2nd termination | terminus process automatic execution mode is set.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Content recording / reproducing apparatus, 2 ... Control part, 10 ... Music processing part, 20 ... CPU, 27 ... Rights processing and music processing module, 27B ... DSP, 27C ... RAM, 27D ... EEPROM , 50... Input buffer, 51... Output buffer, 52... Data processing control unit, 53... Data processing block, 54 ... decoder unit, 54A to 54N. ...... De-emphasis filter unit 57 57 Encoder unit 57A to 57N Encoder 100 Data processing unit 101 Data processing unit 102 Control unit 103 Detection unit 104 Calculation , 105... Data processing control unit, RT 1, RT 4, RT 5... Reproduction data processing control processing procedure, RT 2. Management control processing procedure, RT3 ...... format conversion data processing control procedure, PC ...... packet, PD, PD1 to PD3 ...... packet data, PH ...... packet header, OD1 to OD3 ...... output data.

Claims (6)

At least one of a decoding unit that decodes input encoded data and outputs the obtained decoded processing data, and an encoding unit that encodes input data and outputs the obtained encoded processing data A data processing unit having one;
A control unit for controlling the data processing unit,
The control unit
An instruction to execute termination processing on the first data input to the data processing unit, and a detection unit that detects an input data size of the first data;
A calculation unit for calculating an output data size according to the input data size;
When the execution instruction of the termination processing is detected by the detection unit, when the data size of the first data input to the data processing unit reaches the input data size, the processing data in the data processing unit The data processing unit is controlled so as to be processed and output, and when the execution instruction of the termination processing is not detected by the detection unit, the data size of the output data output from the data processing unit is A data processing control unit that controls the data processing unit to operate the data processing unit until the output data size is reached. The data processing control unit
When the execution instruction of the termination process is not detected by the detection unit, when the data size of the first data input to the data processing unit reaches the input data size, the first data is continued. The data processing apparatus according to claim 1, wherein the data processing unit is controlled to input second data to the data processing unit. The data processing control unit
When the execution instruction of the termination process is not detected by the detection unit, when the data size of the first data input to the data processing unit reaches the input data size, the input of the second data is 2. The data processing apparatus according to claim 1, wherein when the absence is detected, the data processing unit is controlled so as to process and output all the processing data in the data processing unit. The data processing control unit
When the execution instruction of the termination processing is not detected by the detection unit, the encoding method for the second data input following the first data is different from the encoding method for the first data. 2. The data processing apparatus according to claim 1, wherein the data processing unit is controlled so as to process and output all the processing data in the data processing unit when detected. At least one of a decoding unit that decodes input encoded data and outputs the obtained decoded processing data, and an encoding unit that encodes input data and outputs the obtained encoded processing data A detection step of detecting a termination processing execution instruction for the first data input to the data processing unit having one, and an input data size of the first data;
A calculation step of calculating an output data size according to the input data size detected in the detection step;
When the execution instruction of the termination process is detected in the detection step, when the data size of the first data input to the data processing unit reaches the input data size, the processing data in the data processing unit When the execution instruction of the termination process is not detected in the detection step, the data size of the output data output from the data processing unit is A data processing method comprising: a data processing control step for controlling the data processing unit to operate the data processing unit until an output data size is reached. For information processing equipment
At least one of a decoding unit that decodes input encoded data and outputs the obtained decoded processing data, and an encoding unit that encodes input data and outputs the obtained encoded processing data A detection step of detecting a termination processing execution instruction for the first data input to the data processing unit having one, and an input data size of the first data;
A calculation step of calculating an output data size according to the input data size detected in the detection step;
When the execution instruction of the termination process is detected in the detection step, when the data size of the first data input to the data processing unit reaches the input data size, the processing data in the data processing unit When the execution instruction of the termination process is not detected in the detection step, the data size of the output data output from the data processing unit is A data processing control program for executing a data processing control step for controlling the data processing unit to operate the data processing unit until the output data size is reached.

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