JP2007079876A - Signal processor, signal processing method and signal processing program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently output a desired error log. <P>SOLUTION: When error occurs in a DSP (digital signal processor) 14 of a signal processing module 13, an encrypted error log ELC encrypted after setting a flag F to an error log EL based on an error processing mode table TBL according to an error processing mode preliminarily designated by a debug worker is stored, whereby the debug worker can refer to only the desired error log EL only by acquiring and decoding all encrypted error logs ELC in a control part 11 and displaying only the error log EL with the flag F set thereto on a display part 19. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a signal processing device, a signal processing method, and a signal processing program, and is suitably applied to, for example, a content reproduction device that reproduces music content.

  2. Description of the Related Art Conventionally, in a content playback apparatus, a music signal obtained by converting music content is received by, for example, receiving a radio and playing a CD (Compact Disc), and the amplified music signal is output from a speaker. Those made to listen to music based on them are widely spread.

  Also, in recent content playback devices, music content is digitized and compressed and encoded by a compression encoding method such as MP3 (Motion Pictures Expert Group-1 Layer-3) or ATRAC (Adaptive TRansform Acoustic Coding), and the data format is a hard disk. There has also been proposed a jukebox that can be used as a jukebox that can immediately reproduce desired music content by storing a large amount in a large-capacity storage medium such as a drive.

  Such a content playback apparatus has various functions such as encoding / decoding processing, compression / decompression processing, or database management processing such as title information, in addition to music content playback processing. For this reason, at the development stage of the content reproduction apparatus, a great amount of time and effort is required for so-called debugging work in which each function is experimentally operated to find and correct an error.

As one of the effective methods in this debugging work, the content playback device itself has a function of recording a series of information about the error, that is, an error log when an error occurs, and referring to the error log later In order to elucidate the cause of an error and to examine countermeasures, there has been proposed (for example, see Patent Document 1).
JP 2003-198746 A (FIG. 2)

  Some content playback apparatuses have a function of outputting an error notification signal for notifying that an error has occurred when an error occurs, in addition to a function of recording an error log.

  For example, as shown in FIG. 10, the content reproduction apparatus 1 is totally controlled by a control unit 2 having a CPU (Central Processing Unit, not shown) configuration. The controller 2 is connected to the signal processing module 4 via the bus 3.

  The signal processing module 4 is a DSP (Digital Signal Processor) 5 that performs encoding / decoding processing, right processing (that is, processing for confirming whether or not the right information of encrypted music data is valid), and the like. And a memory 6 used as a work area of the DSP 5 and an ASIC (Application Specific Integrated Circuit) 7 that restricts access from the control unit 2 to the DSP 5 and the memory 6.

  The control unit 2 is connected to a display unit 8 for displaying various information such as title information, volume, time, and the like of music content, and an operation unit (not shown) that receives operations from the user.

  When a debugging operation is performed in the content reproduction apparatus 1, the signal processing module 4 performs error processing according to the flowchart shown in FIG.

  That is, the signal processing module 4 starts the error processing procedure RT1, moves to step SP1, executes a predetermined process such as a decoding process, and determines whether or not the execution result of this process is an error in the next step SP2. Determine. If a negative result is obtained here, the signal processing module 4 returns to step SP1 again to execute the next process.

  On the other hand, if an affirmative result is obtained in step SP4, the signal processing module 4 proceeds to the next step SP3 and executes error processing such as recording the error log EL in the memory 6, and proceeds to the subsequent step SP4 to the control unit 2. On the other hand, after outputting the error notification signal SE via the bus 3, the process proceeds to step SP1 again to execute the next process.

  On the other hand, the control unit 2 is configured to execute an error notification handling process according to the flowchart shown in FIG.

  That is, the control unit 2 starts the error notification handling processing procedure RT2, moves to step SP11, executes control processing such as updating of display contents on the display unit 8, moves to next step SP12, and transfers from the signal processing module 4 to the bus. 3 determines whether or not the error notification signal SE has been received. If a negative result is obtained here, the control unit 2 does not need to execute the error handling process in particular, and thus returns to step SP11 again to execute the next process.

  On the other hand, if an affirmative result is obtained in step SP12, this indicates that some error has occurred in the signal processing module 4. At this time, the control unit 2 moves to the next step SP13 and stops reproduction of music content, for example. After executing a predetermined error handling process such as, the process returns to step SP11 to execute the next control process.

  Thereafter, the control unit 2 makes a transition to a log acquisition mode different from the normal mode in which music content is played back, etc., by a predetermined operation mode switching operation by the debug operator, and the error log acquisition processing procedure shown in FIG. RT3 is executed.

  In other words, the control unit 2 starts the error log acquisition processing procedure RT3, moves to step SP21, requests the signal processing module 4 to transmit the error log EL, and then in step SP22 from the signal processing module 4 to the error log. Receive EL. Next, the control unit 2 moves to step SP23, displays the received error log EL on the display unit 8, and ends this error log acquisition processing procedure RT3.

  Thereafter, the content reproduction apparatus 1 displays a desired error log EL so that the content can be recognized by causing a debug operator to perform a predetermined scroll operation or the like.

  By the way, in the content reproduction apparatus 1, since errors frequently occur at the development stage, the amount of error log EL becomes enormous. As a result, the content reproduction apparatus 1 takes a great deal of time when the debug operator searches for a desired error log EL from among the enormous error logs EL, and the work efficiency of debugging deteriorates. was there.

  The present invention has been made in consideration of the above points, and intends to propose a signal processing apparatus, a signal processing method, and a signal processing program that can efficiently output a desired error log.

  In order to solve such a problem, in the present invention, the signal processing module performs signal processing on the input data, detects an error generated in the signal processing unit, and controls the signal processing module. According to the setting of the error, the control unit is notified that an error has been detected, an error log corresponding to the detected error is generated, the error log is encrypted, and the control unit according to the second setting The encrypted error log is recorded in the memory together with the flag, and the encrypted error log recorded in the memory is transferred to the control unit together with the flag in response to a request from the control unit. The encrypted error log transferred from the processing module is decrypted, and a part of the decrypted error log is output according to the flag transferred from the signal processing module. It was way.

  By performing the first setting and the second setting from the control unit to the signal processing module in advance, the signal processing module indicates that an error has been detected only when an error according to the first setting is detected. Since the flag is associated with the error according to the second setting, the second setting can be made using the flag when the control unit refers to the error log. It is possible to easily extract and output an error log corresponding to the.

  According to the present invention, an error is detected only when an error corresponding to the first setting is detected by performing the first setting and the second setting in advance for the signal processing module from the control unit. Can be notified from the signal processing module to the control unit, and since the flag is associated with the error according to the second setting, the flag is used when the control unit refers to the error log. Thus, an error log according to the second setting can be easily extracted and output, and thus a signal processing apparatus, a signal processing method, and a signal processing program that can efficiently output a desired error log can be realized.

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

(1) Configuration of Content Reproducing Device FIG. 1 shows a functional configuration of a content reproducing device 100 that reproduces music content. A control unit 101 that performs overall control in general, and control by the control unit 101. The signal processing module 102 executes various signal processing such as music content playback processing.

  The signal processing module 102 includes a signal processing unit 103 that performs signal processing on data D input from an input unit (not shown), an error detection unit 104 that detects an error generated in the signal processing unit 103, and a control unit 101. According to the first setting by the error detection unit 104, a notification unit 105 that notifies the control unit 101 that an error has been detected, an error log generation unit 106 that generates an error log EL corresponding to the error, An encryption unit 107 that encrypts the error log EL, a recording control unit 108 that records the encrypted error log ELC together with the flag F in the memory 109 according to the second setting by the control unit 101, and a control unit In response to a request from 101, the encrypted error log ELC recorded in the memory 109 is transferred to the control unit 101 together with the flag F. And a feed portion 110.

  Further, the control unit 101 decrypts the encrypted error log ELC transferred from the signal processing module 102 and the decryption unit 111 according to the flag F transferred from the signal processing module 102. And an output unit 112 that outputs a part of the error log EL.

  Next, with reference to FIG. 2, the content reproduction apparatus 10 that realizes the above-described configuration of the content reproduction apparatus 100 with a specific hardware configuration will be described. In the content reproduction apparatus 10, a CPU (Central Processing Unit) (not shown) expands various programs read from an EEPROM (Electronically Erasable and Programmable Read Only Memory) (not shown) in a RAM (Random Access Memory) (not shown). By executing this, overall control is performed and various processes are performed.

  The control unit 11 is connected to the signal processing module 13 via the bus 12. The signal processing module 13 is a DSP (Digital Signal Processor) 14 that performs encoding / decoding processing and right processing (that is, processing for confirming whether the right information of encrypted music data is valid). And a non-volatile memory 15 that is used as a work area of the DSP 14 and stores various setting values, and an ASIC (Application Specific) that restricts access from the control unit 11 to the DSP 14 and the memory 15. Integrated Circuit) 16.

  When the DSP 14 of the signal processing module 13 detects that an error has occurred during execution of various processes, the DSP 14 generates an error log EL indicating the date and time of occurrence of the error, the location and contents of the error, and encrypts the error log EL using a predetermined method. To be converted into an encryption error log ELC and recorded in the memory 15.

  The control unit 11 also outputs a part of the error log EL decrypted by the decryption processing unit 17 to the display unit 19 together with the decryption processing unit 17 for decrypting the encrypted error log ELC. 18 and an operation unit (not shown) for receiving an operation from the user is connected.

  As described above, the content reproduction apparatus 10 is configured to perform various processing such as encoding / decoding processing and right processing by the DSP 14 of the signal processing module 13, and when an error occurs during the processing, the error log EL Is generated, converted into an encryption error log ELC, and stored in the memory 15.

(2) Error Notification Mode By the way, in the development stage or the like, the content reproduction apparatus 10 is operated on a trial basis, and a debugging operation is performed to correct the error that has occurred at this time.

  In particular, the DSP 14 of the signal processing module 13 has many functions such as encoding / decoding processing, compression / decompression processing, right processing, etc., so that many errors occur in the development stage and debugging work is performed. It can be difficult.

  In order to facilitate such debugging work, the DSP 14 transmits an error notification signal SE for notifying in real time that an error has occurred when an error occurs, and the error log described above. It has a flag setting function for facilitating later extraction of the error log EL by setting a flag F to the error log EL that matches a pre-specified condition in the EL.

  Further, since the DSP 14 has many functions, errors of various importance levels, from a minor one to a serious one, occur. Therefore, in order to classify these errors, the DSP 14 associates in advance an error level EV including three levels of “low”, “medium”, and “high” corresponding to the respective importance levels.

  In addition to this configuration, the memory 15 of the signal processing module 13 stores in advance an error processing mode table TBL for easily specifying the error notification function and the flag setting function in combination as shown in FIG. Yes.

  In the error processing mode table TBL, there are a notification availability NT for enabling or disabling the error notification function, and a flag setting error level EF for specifying an error log EL for setting a flag F by an error level EV. There are provided six error processing modes, “error processing mode 1” to “error processing mode 6”, depending on the combination of notification availability NT and flag setting error level EF.

  The notification possibility NT of the error processing mode table TBL indicates whether or not the error notification signal SE is sent in real time when an error occurs in the DSP 14, and “◯” (that is, notification) or “×” (that is, notification) (Not notify) is assigned.

  Incidentally, the notification possibility NT of the error processing mode table TBL is an error processing mode in which an error processing mode value (ie, “1” to “6”) is equal to or greater than a predetermined boundary value BD (in this case, “4”). In other error processing modes, “×” is assigned.

  The flag setting error level EF of the error processing mode table TBL represents the setting conditions for setting the flag F for the error log EL when an error occurs in the DSP 14 by the error level. Either “Medium” or “High” is assigned.

  This flag setting error level EF means to include a higher level. For example, when the flag setting error level EF is assigned to the “medium” level, the DSP 14 sets “medium” level and “high” level. The flag F is set for the error log EL of the “level”.

  As described above, the signal processing module 13 has six error processing modes that combine the setting of the notification availability NT regarding the error notification function and the setting of the flag setting error level EF regarding the flag setting function, and the error processing in which the allocation content is defined. The mode table TBL is stored in the memory 15.

(3) Error processing according to error processing mode (3-1) Error processing by signal processing module By the way, the content playback apparatus 10 asks a debugging operator in advance to handle an error processing mode (that is, error processing mode 1 to error) at the time of product development. Any one of the processing modes 6) is designated, and the error processing mode is notified from the control unit 11 to the DSP 14 of the signal processing module 13 in accordance with the designation result at this time.

  After that, the DSP 14 of the signal processing module 13 is configured to execute error processing according to the specified error processing mode when an error occurs when executing various processing. This will be described below with reference to the flowchart shown in FIG.

  The DSP 14 starts the error processing procedure RT4 by receiving a predetermined processing start command from the control unit 11 according to the operation instruction of the debugging worker, and proceeds to step SP31. In step SP31, the DSP 14 executes processing such as music content compression encoding, and proceeds to the next step SP32.

  In step SP32, the DSP 14 determines whether an error has occurred. If a negative result is obtained here, the DSP 14 returns to step SP31 again and executes the next processing.

  On the other hand, if a positive result is obtained in step SP32, this indicates that an error has occurred and it is necessary to execute processing corresponding to the error. At this time, the DSP 14 proceeds to the next step SP33.

  In step SP33, the DSP 14 determines whether or not the error level EV of the generated error is higher than the flag setting error level EF. For example, when the error level EV of an error that has occurred when the error processing mode 5 is specified and the flag setting error level EF is “medium” is “high”, a positive result is obtained in this step SP33. This indicates that the flag F should be set in the error log EL. At this time, the DSP 14 proceeds to the next step SP34.

  In step SP34, the DSP 14 generates an error log EL according to the content of the error that has occurred, sets a flag F in the error log EL, and performs a predetermined encryption process to convert it into an encrypted error log ELC. This is stored in the memory 15, and the process proceeds to the next step SP36.

  On the other hand, for example, when the error processing mode 5 is designated and the flag setting error level EF is “medium”, the error level EV of the error that has occurred is “low”, and a negative result is obtained in step SP33. This means that the flag F should not be set in the error log EL. At this time, the DSP 14 proceeds to the next step SP35.

  In step SP35, the DSP 14 generates an error log EL according to the content of the error that has occurred, converts it into an encrypted error log ELC by applying a predetermined encryption process, stores this in the memory 15, and stores the next Control goes to step SP36.

  In step SP36, the DSP 14 compares the error processing mode value EM with the boundary value BD ("4" in this embodiment). For example, when a positive result is obtained in this step SP36 as in the case where the error processing mode 5 is designated and the notification possibility NT is “◯”, this indicates that error notification should be performed. The DSP 14 moves to the next step SP37.

  In step SP37, the DSP 14 sends out an error notification signal SE from the ASIC 16 (FIG. 2) to the control unit 11 via the bus 12, thereby ending a series of processing corresponding to the error, and then returning to step SP31 again. Execute the process.

  On the other hand, when a negative result is obtained in step SP36, for example, when the error processing mode 2 is specified and the notification possibility NT is “x”, this indicates that error notification should not be performed. The DSP 14 returns to step SP31 again to execute the next process.

  In this way, the DSP 14 of the signal processing module 13 determines whether or not to set the flag F in the error log EL based on the comparison result between the flag setting error level EF in the error processing mode designated in advance and the error level EV of the error that has occurred. And whether or not to perform error notification is determined based on the notification availability NT of the error processing mode.

(3-2) Error notification handling processing and error log acquisition processing by the control unit Correspondingly, the control unit 11 follows the error notification handling processing procedure RT5 as shown in FIG. Processing corresponding to SE is executed.

  In other words, the control unit 11 starts the error processing procedure RT5 by receiving an instruction to start predetermined control processing from the debug operator, and proceeds to step SP41. In step SP41, the control unit 11 executes a control process such as updating the display contents on the display unit 18 and proceeds to the next step SP42.

  In step SP42, the control unit 11 determines whether or not the error notification signal SE has been received from the signal processing module 13. If a negative result is obtained here, this indicates that an error that needs to be notified has not occurred in the signal processing module 13, and at this time, the control unit 11 returns to step SP41 again and proceeds to the next step. Execute the process.

  On the other hand, when a positive result is obtained in step SP42, this indicates that an error that needs to be notified has occurred in the signal processing module 13, and at this time, the control unit 11 corresponds to the received error notification signal SE. Therefore, the process proceeds to the next step SP43.

  In step SP43, the control unit 11 executes an error handling process such as displaying that an error has occurred on the display unit 18, and returns to step SP41 again to execute the next control process.

  After such control processing is completed, the control unit 11 of the content reproduction apparatus 10 acquires a log for acquiring the error log EL from the signal processing module by performing a predetermined operation mode switching operation by the debug operator. Transition is made to the mode, and the error log acquisition processing procedure RT6 shown in FIG. 6 is executed.

  That is, the control unit 11 starts an error processing procedure RT6 by receiving an error log acquisition instruction from the debug operator, and proceeds to step SP51. In step SP51, the control unit 11 reads all the encryption error logs ELC from the memory 15 via the bus 12, and proceeds to the next step SP52.

  In step SP52, the control unit 11 restores the error log EL by performing a predetermined decryption process on the encrypted error log ELC by the decryption processing unit 17, and proceeds to the next step SP53.

  In step SP53, the control unit 11 extracts only the error log EL for which the flag F is set from the restored error log EL by the output processing unit 18 and sends it to the display unit 19 to display it on the display screen. The process proceeds to step SP54 to end the error log acquisition processing procedure RT6.

  As described above, when the error notification signal SE is acquired from the signal processing module 13, the control unit 11 executes a predetermined error handling process in real time, and when the control unit 11 shifts to the log acquisition mode according to an instruction from the debug operator, Only the error log EL in which the flag F is set is extracted from the error log EL obtained by acquiring and decoding the conversion error log ELC and displayed on the display unit 19.

(4) Sound skip confirmation mode By the way, in the content reproduction apparatus 10, when reproducing music based on compression-encoded music content or the like, it is required not to be interrupted during reproduction.

  Therefore, the content playback device 10 is different from the above-described normal mode and log acquisition mode in a sound skip confirmation mode for confirming whether or not music is interrupted during playback of music content (hereinafter referred to as “sound skip”). Have.

(4-1) Error processing by signal processing module In practice, the control unit 11 of the content playback apparatus 10 shifts to a sound skip confirmation mode when a predetermined operation mode switching operation is performed by a debug operator, and corresponds to FIG. In accordance with the error processing procedure RT7 shown in FIG. 7, the signal processing module 13 performs error processing while decrypting the music content.

  That is, the DSP 14 of the signal processing module 13 starts the error processing procedure RT7 upon receiving a notification from the control unit 11 that the sound skip confirmation mode is to be entered, and proceeds to step SP61. In step SP61, the DSP 14 executes reproduction processing such as decryption of the music content, and proceeds to the next step SP62.

  In step SP62, the DSP 14 determines whether or not a sound skip (that is, an error) has occurred. If a negative result is obtained here, the DSP 14 returns to step SP61 again and executes the next processing.

  On the other hand, if an affirmative result is obtained in step SP62, this indicates that it is necessary to execute processing corresponding to the occurrence of the sound skip because of the sound skip, and at this time the DSP 14 proceeds to the next step SP63. Move.

  In step SP63, the DSP 14 sets a flag F in the error log EL indicating the skipping content, and proceeds to the next step SP64. Incidentally, the error name, error number, error level, error occurrence location, error occurrence time, and the like are stored in the error log EL at this time.

  In step SP64, the DSP 14 converts the error log EL into an encrypted error log ELC by performing a predetermined encryption process, writes it into the memory 15, and then returns to step SP61 again to continue the reproduction process.

  As described above, the DSP 14 of the signal processing module 13 regards the sound skip as an error and sets and records the flag F in the error log EL in the sound skip confirmation mode, but does not notify the controller 11 of the error. Has been made. This corresponds to, for example, the case where the error processing procedure RT4 (FIG. 4) described above is set to the error processing mode 1 (FIG. 3) and the sound skip is set to the error level “low”.

(4-2) Reproduction control processing and error log acquisition processing by the control unit Correspondingly, the control unit 11 follows the reproduction control processing procedure RT8 as shown in FIG. 8 corresponding to FIG. Processing corresponding to the error notification signal SE is executed.

  That is, the control unit 11 starts the reproduction control procedure RT8 when the debug operator performs the switching operation to the skip sound confirmation mode, and proceeds to step SP71. In step SP71, the control unit 11 executes a playback control process such as updating the playback time of the music content displayed on the display unit 19, and accepts an instruction to stop playback of the music content or a playback stop by the debug operator. Repeat until.

  In this case, unlike the error handling procedure RT5, the control unit 11 does not acquire an error notification from the signal processing module 13, and therefore corresponds to a case where a negative result is always obtained in step SP42 of the error handling procedure RT5. The processing to be continued.

  After such playback control processing is completed, the control unit 11 of the content playback device 10 is switched to the log acquisition mode by the debug operator, thereby performing the error log acquisition processing procedure RT9 shown in FIG. 9 corresponding to FIG. It is made to run.

  That is, the control unit 11 starts an error processing procedure RT9 by receiving an error log acquisition instruction from the debug operator, and proceeds to step SP81. In step SP81, the control unit 11 reads all the encryption error logs ELC (that is, error skip error logs) from the memory 15 via the bus 12, and proceeds to the next step SP82.

  In step SP82, the control unit 11 restores the skipped error log EL by performing a predetermined decryption process on the encrypted error log ELC by the decryption processing unit 17, and proceeds to the next step SP83.

  In step SP83, the control unit 11 sends, from the output processing unit 18 to the display unit 19, the error log EL in which the flag F is set among the restored skipping error log EL (all error logs EL in this case). As a result, the image is displayed on the display screen, the process proceeds to the next step SP84, and the error log acquisition processing procedure RT9 is terminated.

  As described above, the control unit 11 continues the reproduction control process because the error notification signal SE is not transmitted even if a sound skip (that is, an error) occurs in the DSP 14 of the signal processing module 13. Further, when the control unit 11 shifts to the log acquisition mode in response to an instruction from the debug operator, the control unit 11 acquires all the encrypted error logs ELC, decrypts them into skipping error logs EL, and displays them on the display unit 19. Yes.

(5) Operation and Effect In the above configuration, when the signal processing module 13 of the content reproduction apparatus 10 causes the debug operator to specify an error processing mode in advance and an error occurs when executing a predetermined process, Whether the flag F is set in the error log EL based on the comparison result between the flag setting error level EF of the designated error processing mode and the error level EV of the error that has occurred with reference to the error processing mode table TBL (FIG. 3) And whether or not to perform error notification is determined on the basis of the notification availability NT of the error processing mode.

  In response to this, when the error notification signal SE is acquired from the signal processing module 13, the control unit 11 executes a predetermined error handling process in real time, and when the control unit 11 transitions to the log acquisition mode according to an instruction from the debug operator, Only the error log EL in which the flag F is set is extracted from the error log EL obtained by decrypting the encrypted error log ELC and displayed on the display unit 19.

  Therefore, the content reproduction apparatus 10 sets the flag F for the error log EL that the debug operator wants to refer to later in the DSP 14 of the signal processing module 13 by designating the error processing mode in advance by the debug operator. Therefore, the debug operator desires only by acquiring all the error logs EL by the control unit 11, extracting only the error log EL in which the flag F is set, and displaying the error log EL on the display unit 19. Only the error log EL can be referred to.

  At this time, the control unit 11 may extract the error log EL in which the flag F is set in advance and display the error log EL on the display unit 19. Therefore, for example, the error log EL that matches a predetermined condition among all the error logs EL is selected. Compared to the case where complicated processing such as searching is performed, only the error log EL desired by the debug operator can be displayed by extremely simple processing.

  As a result, the control unit 11 of the content reproduction apparatus 10 does not need to take the trouble of having the debug operator visually search for a desired error log EL among all the error logs EL. This eliminates the need for complicated operations such as setting error log EL extraction conditions.

  When the error processing mode is designated in advance and the content reproduction apparatus 10 is set not to perform error notification when an error occurs in the DSP 14, the content reproduction apparatus 10 can reduce traffic on the bus associated with the error notification. The control unit 11 can be prevented from performing error handling processing.

  For example, when the content playback apparatus 10 confirms the presence or absence of sound skipping during playback of music content during debugging, a large number of error notification signals SE flow on the bus 12 if sound skipping (ie, errors) occur frequently. As a result, the transmission / reception of the music content signal is hindered to cause further sound skipping, and the transmission / reception of other data such as a control signal flowing through the bus 12 is also hindered. .

  However, since the content playback apparatus 10 is set so as not to perform error notification, the bus 12 can be kept at a traffic volume substantially the same as that during normal music content playback, so that sound skipping can be correctly confirmed. Can do.

  In this case, although the content reproduction apparatus 10 does not send an error notification in real time, the error log EL indicating the content of the error can be stored in the memory 15, so that the error log can be later given to the debug operator. By referring to the EL, the error state can be correctly grasped.

  Furthermore, since the content reproduction apparatus 10 monitors the presence or absence of sound skipping by the DSP 14 and records it as an error log EL, for example, confirming the presence or absence of sound skipping by carefully listening to the music content for a debug operator, for example. It is not necessary to perform a labor-intensive work such as, and it is possible to confirm the presence or absence of the sound skipping only by confirming the contents of the error log EL later.

  In addition, the content playback apparatus 10 has six types of error processing in which the allocation of the notification availability NT regarding the error notification function and the flag setting error level EF regarding the flag setting function are combined on the error processing mode table TBL stored in the memory 15 in advance. Since it has a mode, the setting condition of the flag F for the error log EL and whether or not error notification can be made can be specified at the same time by having the debug operator specify only one error processing mode.

  Further, the signal processing module 13 of the content reproduction apparatus 10 stores the encrypted error log ELC obtained by encrypting the error log EL in the memory 15, and the encrypted error log ELC is encrypted through the bus 12. To the control unit 11. For this reason, the content reproduction apparatus 10 illegally intercepts an encrypted error log ELC including confidential information, such as an error log EL related to rights processing, via a bus 12 by a third party or illegally from the memory 15. Even if the encrypted error log ELC is read, the possibility that the encrypted error log ELC is illegally decrypted is extremely low, and thus leakage of confidential information included in the error log EL can be prevented with high accuracy.

  According to the above configuration, when an error occurs in the DSP 14 of the signal processing module 13, the content reproduction apparatus 10 performs error log based on the error processing mode table TBL according to the error processing mode specified in advance by the debug operator. By deciding whether or not to set the flag F in the EL, the control unit 11 acquires all the error logs EL, extracts only the error log EL in which the flag F is set, and causes the display unit 19 to display it. Thus, only the error log EL desired by the debug operator can be referred to.

  In addition, when an error occurs in the DSP 14 of the signal processing module 13, the content reproduction apparatus 10 determines whether or not to send an error notification signal SE according to an error processing mode designated in advance by the debug operator, and performs control. Only when the error notification signal SE is acquired in the unit 11, a predetermined error handling process is executed in real time, so that when the error notification is not set, the traffic on the bus accompanying the error notification needs to be increased. Can be minimized.

(6) Other Embodiments In the above-described embodiment, when the error processing mode is specified, the setting condition of the flag F for the error log EL and the availability of error notification are determined according to the error processing mode table TBL. Although the case where they are set at the same time has been described, the present invention is not limited to this. For example, the setting condition of the flag F for the error log EL and whether or not error notification can be performed may be set directly and independently. good.

  In the above-described embodiment, the case where the error notification is set uniformly for all errors has been described. However, the present invention is not limited to this, for example, a specific error set in advance. Set to send error notification only when a level EV error occurs, or set to send error notification only when a specific type of error (such as sound skipping or rights processing error) occurs, Or, conversely, error notification may be set in combination with various conditions, such as setting not to perform error notification only when a specific error occurs.

  Further, in the above-described embodiment, the case where the flag F is set according to the error level EV of the error that has occurred has been described. However, the present invention is not limited to this, and for example, a specific type of error set in advance. The flag F may be set in the error log EL (for example, an error related to skipping or right processing), or the flag F may be set in an error log EL other than a specific type of error.

  Further, in the above-described embodiment, the case where the flag F is set to all the error logs EL that match the set condition has been described. However, the present invention is not limited to this. If it continues more than once, the flag F may be set only for the first three times, or the flag F may be set only for the error log EL that occurs for the first time for each type of error. As a result, it is possible to further reduce the trouble of searching for the error log EL desired by the debug operator.

  Furthermore, in the above-described embodiment, for example, when the flag setting error level EF is “medium” on the error processing mode table TBL, the error level EV corresponds to the error log EL of “medium” or “high”. Although the case where the flag setting error level EF is also included is described, the present invention is not limited to this. For example, when the flag setting error level EF is “medium”, the error level EV is “ Only the “medium” error log EL may be supported.

  Further, in the above-described embodiment, the case where only the error log EL in which the flag F is set is displayed on the display unit 18 in the control unit 11 is described. However, the present invention is not limited to this. On the contrary, the flag F is set in the error log EL other than the error log EL that the debug operator wants to refer to later in the signal processing module 13, and the error log EL in which the flag F is not set in the control unit 11. May be displayed on the display unit 18.

  Further, in the above-described embodiment, the case where the signal processing module 13 is encrypted in a state where the flag F is set in the error log EL has been described. However, the present invention is not limited to this, for example, the flag F May be separated from the error log EL and managed in the form of a flag management table or the like, and only the error log EL may be encrypted and the flag F may not be encrypted.

  In this case, it is possible to receive the flag management table separately from the encryption error log ELC received by the control unit 11, and to decrypt only the encryption error log ELC in which the flag F is set based on the flag management table. Compared with the case where the presence / absence of a flag is determined after decrypting all the encryption error logs ELC, unnecessary processing such as decryption of the encryption error log ELC for which no flag is set is omitted, thereby improving processing efficiency. Can be improved.

  Further, in the above-described embodiment, the case where all error logs EL are encrypted and stored in the memory 15 as the encrypted error log ELC has been described. However, the present invention is not limited to this, for example, it relates to right processing. The error log EL that does not need to be encrypted, such as the error log EL that is not to be encrypted, may be stored in the memory 15 without being encrypted.

  Furthermore, in the above-described embodiment, the case where the debug operator designates the error processing mode and performs the debug work at the time of product development of the content reproduction apparatus 10 has been described. “Error processing mode 3” is designated, that is, error notification is not performed, and only the error log EL with the error level EV “high” is set and recorded, so that the maintenance of the content reproduction apparatus 10 is performed. An operator who performs repair may perform maintenance or repair while referring to the error log EL.

  Furthermore, in the above-described embodiment, the case where the error log EL in which the flag F is set is displayed on the display unit 19 has been described. However, the present invention is not limited to this, for example, via a predetermined connection cable. The error log EL in which the flag F is set may be sent to an external computer device or a dedicated debugging device, or may be transferred to a storage medium such as a hard disk drive or a memory stick (registered trademark of Sony Corporation). good. In this case, the error log EL may be sent or transferred as it is or in an encrypted error log ELC state.

  Further, in the above-described embodiment, the case where the present invention is applied to the content reproduction apparatus 10 that reproduces music content has been described. However, the present invention is not limited to this, and for example, a mobile phone, a DVD (Digital Versatile Disc) The present invention may be applied to various electronic devices that are debugged during development, such as players, video recorders, personal computers, and game devices.

  Further, in the above-described embodiment, a signal processing module, an error detection unit, an error log generation unit, an encryption unit, a DSP as a recording control unit, and an ASIC 13 as a notification unit and a transfer unit, as a signal processing module. The case where the processing module 13 is configured and the control unit 11 as the control unit is configured by the decoding processing unit 17 as the decoding unit and the output processing unit 18 as the output unit has been described. Not limited to this, a signal processing module having various circuit configurations, an error detection unit, a notification unit, an error log generation unit, an encryption unit, a recording control unit, and a transfer unit constitute a signal processing module. The control unit may be configured by a decoding unit having various other circuit configurations and an output unit.

  The present invention can be used in various electronic devices having a function of notifying an error when an error occurs and recording an error log.

It is a block diagram which shows the function structure of a content reproduction apparatus. It is a block diagram which shows the hardware constitutions of the content reproduction apparatus by one Embodiment of this invention. It is a basic diagram which shows an error processing mode table. It is a flowchart which shows the error processing procedure by a signal processing module. It is a flowchart which shows the error notification corresponding | compatible process sequence by a control part. It is a flowchart which shows the error log acquisition process procedure by a control part. It is a flowchart which shows the error processing procedure by the signal processing module in a sound skip confirmation mode. It is a flowchart which shows the reproduction | regeneration control processing procedure by the control part in a sound skip confirmation mode. It is a flowchart which shows the error log acquisition process procedure by the control part in a sound skip confirmation mode. It is a block diagram which shows the hardware constitutions in the conventional content reproduction apparatus. It is a flowchart which shows the error processing procedure by the conventional signal processing module. It is a flowchart which shows the error notification corresponding | compatible process sequence by the conventional control part. It is a flowchart which shows the error log acquisition process sequence by the conventional control part.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1, 10, 100 ... Content reproduction apparatus 2, 11, 101 ... Control part, 3, 12 ... Bus, 4, 13, 102 ... Signal processing module, 5, 14 ... DSP, 6, 15, 109: Memory, 7, 16: ASIC, 8, 19: Display unit, 17: Decoding processing unit, 18: Output processing unit, 103: Signal processing unit, 104: Error detection unit, 105 ...... Notification unit, 106 ...... Error log generation unit, 107 ...... Encryption unit, 108 ...... Recording control unit, 109 ...... Memory, 110 ...... Transfer unit, 111 ...... Decryption unit, 112 ...... Output unit , EL: Error log, ELC: Encryption error log, F: Flag.

Claims (9)

A signal processing module;
A control unit for controlling the signal processing module,
The signal processing module is
A signal processing unit that performs signal processing on the input data;
An error detection unit for detecting an error occurring in the signal processing unit;
In response to the first setting by the control unit, a notification unit for notifying the control unit that the error has been detected by the error detection unit,
An error log generation unit that generates an error log corresponding to the detected error;
An encryption unit for encrypting the error log;
A recording control unit that records the encrypted error log in a memory together with a flag in accordance with a second setting by the control unit;
A transfer unit that transfers the encrypted error log stored in the memory to the control unit together with the flag in response to a request from the control unit;
The control unit
A decryption unit for decrypting the encrypted error log transferred from the signal processing module;
An output unit that outputs a part of the decoded error log in accordance with the flag transferred from the signal processing module. The signal processing apparatus according to claim 1, wherein the notification unit prohibits notification to the control unit in accordance with the first setting. The first setting indicates an error level relatively representing the importance of the error,
The signal processing apparatus according to claim 1, wherein the notification unit notifies the control unit only of the error that is equal to or higher than the error level indicated by the first setting. The first setting indicates the type of error,
The signal processing apparatus according to claim 1, wherein the notifying unit prohibits notifying the control unit of the error corresponding to the error type indicated by the first setting. The second setting indicates an error level that relatively represents the importance of the error,
The signal processing device according to claim 1, wherein the recording control unit sets the flag for the error log corresponding to the error that is equal to or higher than the error level indicated by the second setting. . The second setting indicates the type of error,
The signal processing apparatus according to claim 1, wherein the recording control unit sets the flag for the error log corresponding to the type of error indicated by the second setting. The signal processing apparatus according to claim 1, wherein the first setting and the second setting are associated with the same setting value. A signal processing step of performing signal processing on the input data by the signal processing module;
An error detection step of detecting an error generated in the signal processing step by the signal processing module;
A notification step of notifying the control unit from the signal processing module that the error has been detected in the error detection step according to a first setting by the control unit that controls the signal processing module;
An error log generation step for generating an error log corresponding to the error by the signal processing module;
An encryption step of encrypting the error log by the signal processing module;
A recording control step of recording the encrypted error log together with a flag in a memory by the signal processing module in accordance with a second setting by the control unit;
A transfer step of transferring the encrypted error log stored in the memory together with the flag from the signal processing module to the control unit in response to a request from the control unit;
A decryption step of decrypting the encrypted error log transferred from the signal processing module by the control unit;
A signal processing method comprising: an output step of outputting a part of the decoded error log from the control unit according to the flag transferred from the signal processing module. For signal processing equipment,
A signal processing step of performing signal processing on the input data by the signal processing module;
An error detection step of detecting an error generated in the signal processing step by the signal processing module;
A notification step of notifying the control unit from the signal processing module that the error has been detected in the error detection step according to a first setting by a control unit that controls the signal processing module;
An error log generation step for generating an error log corresponding to the error by the signal processing module;
An encryption step of encrypting the error log by the signal processing module;
A recording control step of recording the encrypted error log together with a flag in a memory by the signal processing module in accordance with a second setting by the control unit;
A transfer step of transferring the encrypted error log stored in the memory together with the flag from the signal processing module to the control unit in response to a request from the control unit;
A decryption step of decrypting the encrypted error log transferred from the signal processing module by the control unit;
An output step of outputting a part of the decoded error log from the control unit according to the flag transferred from the signal processing module.

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