JP2011165281A - Disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disk device that properly performs ripping even when skipping occurs frequently in a vehicle due to vibration or ripping speed is increased. <P>SOLUTION: A drive unit (10) informs a main control unit (20) that some of digital audio signals are missing via a second communication section. The main control unit (20) informs the drive unit (10) to transmit the digital audio signals including a signal preceding the missing signal via the second communication section. The drive unit (10) transmits the digital audio signals including the signal preceding the missing signal to the main control unit (20) via a first communication section. The main control unit (20) conducts playback control by using the digital audio signals including the signal preceding the missing signal. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a disc apparatus having a function (hereinafter referred to as ripping) for compressing and recording a digital audio signal held on a CD (Compact Disc) or the like into an MP3 (MPEG Audio Layer-3) file or the like. is there.

  An apparatus for temporarily storing digital audio signals acquired from an optical disk in a buffer memory, compressing and converting data read from the buffer memory and recording it on a recording medium has been put into practical use. Thus, in order to efficiently use the buffer memory capacity, it has been proposed to change the speed of acquiring data from the optical disk based on the amount of data stored in the buffer memory (see, for example, Patent Document 1).

  In addition, the I2S standard and SPDIF standard are known as communication formats for connecting a transmitting side that transmits a digital audio signal acquired from an optical disc and a receiving side that rips the received digital audio signal or plays the ripped compressed signal. ing.

  As shown in FIG. 6, the output format of the I2S standard is such that only the digital audio signal is output through three signal lines (BCLK, LRCK, SRDATA) and no subcode is output. Therefore, the I2S standard has a feature that the communication speed can be increased. On the other hand, the SPDIF standard outputs both a digital audio signal and a subcode, but is not suitable for speeding up because of a single signal line. There is a strong demand for high-speed ripping from the market, and I2S standards are often adopted for ripping systems.

JP 2008-198293 A

  However, unlike the prior art, it does not occur when the control of the buffer memory and the control of compressing and converting and recording on the recording medium are performed by one apparatus, but there is a problem that occurs when the following configuration is adopted. The configuration is such that the transmitting side that transmits the digital audio signal acquired from the optical disc and the receiving side that rips and reproduces the received digital audio signal are connected by communication using the I2S standard, etc., and the transmitting side and the receiving side are separated. This is the case of controlling.

  Since the I2S standard output format has no subcode, the receiving side receives only the digital audio signal. Then, there is a problem that the receiving side cannot distinguish whether only the digital audio signal is in a state where data cannot be acquired from the optical disk due to external impact or vibration, or whether the data acquired from the optical disk is a silent part.

  If there is such a problem, a digital audio signal in a state where data cannot be acquired from the optical disk due to external impact or vibration may be ripped as it is on the receiving side. Thereafter, when the ripped portion is reproduced, there may be a state different from the digital audio signal held on the optical disc, for example, silent reproduction or sound skipping.

The present invention has been made to solve the conventional problems, and uses communication between a control unit on a transmission side that acquires and transmits a digital audio signal from an optical disk and a control unit between a control unit on the reception side of another unit. Thus, an object of the present invention is to provide a disk device that can be ripped correctly even in a situation where data skip occurs frequently due to vibration and the ripping speed is increased.

  In order to solve the above-described problem, the present invention includes a first control unit that determines that a digital audio signal is missing, and a second control unit that transmits the digital audio signal by the first communication unit. When the first control unit determines that the digital audio signal is missing, the first control unit notifies the main control unit that the digital audio signal is missing by the second communication unit, and the main control unit The second communication unit notifies the digital audio signal from the position before the missing to the main communication unit, and the second control unit transmits the digital audio signal from the position before the missing to the main control unit by the first communication unit. The main control unit is digitally Characterized by playback control using O signals.

  With the above configuration of the present invention, in addition to the transmission / reception of digital audio signals, the communication between the control unit on the transmission side and the reception side is used together. However, it is possible to provide a disk device capable of correctly ripping.

Block diagram of a disk device according to an embodiment of the present invention The flowchart for demonstrating the processing operation which notifies the lack of the digital data in embodiment of this invention The flowchart for demonstrating the processing operation which notifies the lack of the digital data in embodiment of this invention The flowchart for demonstrating the processing operation which confirms the abnormality of the digital data in embodiment of this invention The flowchart for demonstrating the processing operation which confirms the abnormality of the digital data in embodiment of this invention Diagram showing I2S output format

  Hereinafter, a disk device 100 according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic block diagram of a disk device 100 according to an embodiment of the present invention.

  The disk device 100 is roughly divided into a CD unit 10 and a main control unit 20. First, the CD unit 10 will be described.

  The CD unit 10 includes a pickup 32 that reads data on the disk 30, a motor unit 31 that rotates the disk 30, a driver IC 33 that moves the motor unit 31, and a control unit 40 that performs signal processing of data read from the disk 30. .

  The disk 30 is typically a CD (Compact disk) that holds digital audio signals.

  The pickup 32 acquires the digital audio signal held on the disk 30 and sends the data to the CD_LSI 42.

  The control unit 40 further includes a CPU 41, a CD_LSI 42, and a DRAM 43 when there is a shock proof reproduction function. The CPU 41 transmits / receives device information such as a reproduction state of the CD unit 10 and an instruction command from the main control unit 20 through serial communication between the CPUs 50 of the main control unit 20 described below.

  The CD_LSI 42 processes the digital audio signal acquired from the pickup 32 and outputs it in a communication format such as I2S standard. Further, when the tracking servo, the focus servo, etc. are disconnected, the pickup 32 has a function of notifying the CPU 41 that the digital audio signal cannot be acquired.

  Here, a shock proof reproduction function that requires the DRAM 43 will be described.

  The shock proof reproduction function automatically assigns memory information when a reading error occurs due to the influence of vibration or the like to prevent unpleasant sound skipping. As described above, when the shock proof reproduction function is provided, the disk 30 is rotated at a high speed to increase the speed at which the digital audio signal is acquired, and is temporarily stored in the DRAM 43 or the like. When data cannot be acquired temporarily due to external vibration, the data from the DRAM 43 is automatically output, so that the data that could not be acquired temporarily from the disk 30 until the data in the DRAM 43 is exhausted again. Can be acquired. By doing so, it is possible to prevent data output from being lost, and a more reliable digital audio signal can be transmitted from the CD_LSI 42 to the main control unit 20.

  The CD unit 10 has a function of acquiring a digital audio signal held on the disc 30 and providing the digital audio signal to the main control unit 20 or the like. Used by connecting to equipment.

  Next, each component of the main control unit 20 will be described.

  The CPU 50 once records a digital audio signal output from the CD_LSI 42 of the CD unit 10 in a communication format such as the I2S standard in the RAM 54 and the like, and confirms data consistency.

  The compression LSI 51 converts it into a compression format such as MP3 or WMA and records it in the HDD 52 or the like. In normal reproduction, since the digital audio signal output from the CD unit 10 is not lost, the compression LSI 51 may extract the audio data portion from the digital audio signal, convert it into a compression format, and record it in the HDD 52 or the like.

  The DAC 53 converts the digital signal into an analog signal and sends the analog signal to an amplifier (not shown) or the speaker 60.

  The relationship between the CD unit 10 and the main control unit 20 configured as described above will be described.

The main control unit 20 has a function of ripping and reproducing a digital audio signal, but is configured as a unit different from the CD unit 10. The main control unit 20 transmits / receives only the digital audio signal to / from the CD unit 10 using a communication format such as the I2S standard. In addition, the CPU 41 included in the control unit 40 of the CD unit 10 and the CPU 50 included in the main control unit 20 are connected by serial communication or the like. In this communication, a signal notifying that a digital audio signal has been lost due to a disc scratch or an external impact from the CD unit 10 is included.

  More specifically, for example, when there is an external vibration or the like, the CD unit 10 may fail to read data on the disk 30. Therefore, there is no problem with the digital audio signal output from the CD unit 10 as long as data can be reacquired by the shock proof reproduction function described above. However, even if there is a shockproof playback function, it cannot be handled if the DRAM 43 becomes empty. At that time, in the I2S standard, BCLK and LRCK remain output, but the SRDATA data line is missing. Then, the main control unit 20 cannot distinguish whether the digital audio signal is a silent part during normal reproduction or a missing part. However, if there is a serial communication between the CPU 41 of the CD unit 10 and the CPU 50 of the main control unit 20 that includes a signal notifying that a digital audio signal has been lost, the CPU 50 of the main control unit 20 has a normal digital audio signal. It is possible to distinguish between a silent part and a missing part during reproduction. If it is a missing part, the CPU 50 can take a countermeasure not to make an abnormal sound, such as stopping the ripping and instructing the CPU 41 to connect the data again or removing the part from the ripping target.

  If there is no shock proof reproduction function, the CD_LSI 42 informs the CPU 41 that the servo is disconnected, indicating that the tracking servo, focus servo, etc. are disconnected and the pickup 32 cannot acquire the digital audio signal. At this time, if the CPU 41 informs the main control unit 20 that the digital audio signal has been lost by the serial communication described above, the CPU 50 of the main control unit 20 may be a silent portion or a missing portion during normal reproduction of the digital audio signal. Can be distinguished.

  As described above, the present embodiment is characterized in that the CD unit 10 and the main control unit 20 are connected using the I2S standard, which is a general-purpose communication standard. Then, when a design change such as a function addition is performed, the portion corresponding to the CD unit 10 that acquires the digital audio signal held on the disk 30 rips and reproduces the digital audio signal without any change. The part corresponding to the main control unit 20 can be modified in various ways. The present embodiment is not limited to the present embodiment as long as the portion corresponding to the CD unit 10 and the portion corresponding to the main control unit 20 are connected using a general-purpose communication format such as the I2S standard. For example, a part in which a part corresponding to the CD unit 10 and a part corresponding to the main control unit 20 are mounted on the same substrate is included.

  Next, the processing flow of the CD unit 10 and the main control unit 20 will be described with reference to FIGS. 2, 3, 4, and 5. FIG.

  First, the process performed by the CPU 41 of the CD unit 10 will be described with reference to the flowchart of FIG.

  The CPU 41 of the CD unit 10 includes a module 411 that analyzes a command from the CPU 50 of the main control unit 20, a module 412 that determines the presence or absence of data loss during CD playback, and a module 413 that notifies the CPU 50 of data loss.

  Here, a case with a shock proof reproduction function will be described with reference to FIG.

First, when the module 411 receives a command from the CPU 50 by serial communication or the like (step 4111), the module 411 clears the data missing setting flag in the CPU 41 (step 4112).

  Next, when the module 412 determines that the disc is being reproduced (step 4121), it determines whether the DRAM 43 is empty (step 4122). When determining that the DRAM 43 is empty, the module 412 sets a data loss setting flag, assuming that data loss has occurred (step 4124). Then, the module 413 notifies the CPU 50 of the data missing setting flag set by the module 412 in step 4124 as data missing information by serial communication or the like (step 31).

  Next, the module 413 notifies the CPU 50 of the data missing setting flag set by the module 412 in step 4124 as data missing information to the CPU 50 by serial communication or the like (step 31).

  This is the end of the description of the case with the shockproof playback function, and the case of no shockproof playback function will be described with reference to FIG.

  If there is no shock proof reproduction function, only the part where the process of step 4122 is changed to the process of step 4123 is different from step 4111 to step 31 in FIG.

  In step 4122, the module 412 determines whether or not the DRAM 43 is empty. If there is no shock proof reproduction function, the following determination is made. The module 412 determines whether or not there is a notification from the CD_LSI 42 that the digital audio signal cannot be acquired because the servo is disconnected (step 4123). If it is determined that there is a notification, the module 412 sets a data loss setting flag because data loss has occurred (step 4124). The subsequent steps are the same as those with the shockproof playback function.

  By performing the above processing, in the CD unit 10, when data loss occurs even once in the digital audio signal during reproduction, the information is retained until a new command is transmitted from the CPU 50. By doing so, it is possible to accurately notify the data loss information to the CPU 50, and it is possible to prevent the data loss information from being missed by the CPU 50.

  Next, a digital data abnormality confirmation processing procedure performed by the CPU 50 of the main control unit 20 will be described with reference to a flowchart shown in FIG.

  The CPU 50 sets a module 501 for obtaining the latest information from the CPU 41, a general ripping control during CD playback, a module 502 for determining data recovery and setting recovery, and a target position for data recovery through serial communication or the like in the CPU 41. And a module 504 that restarts ripping by comparing the data of the digital audio signal before the occurrence of data loss.

  First, the module 501 acquires the latest information from the CPU 41 by serial communication or the like (step 5011).

  Next, when the CD unit 10 is playing back (step 5021), the module 502 expands the digital audio signal in the RAM of the CPU 50 (step 5022). If there is no information that the data output is missing in step 5011, the module 502 transfers the digital audio signal expanded in the RAM to the compression LSI 51 (step 5024), and then stores the compressed data in the HDD 52 or the like. Is done.

  On the other hand, if there is information that the digital audio signal is missing in step 5011, the module 502 determines the number of retries (step 5025), and if it is within the specified number of times, sets the position before the missing position as the target position. (Step 5026), the retry counter in the CPU 50 is increased (Step 5027). If the module 502 determines in step 5025 that the number of retries is equal to or greater than the specified number of times, the module 502 continues to rip the song (file) as it is or cancels ripping the entire song (file) ( Step 5028). This is because if the digital audio signal is missing due to scratches on the disk 30, the missing may not be eliminated even if the retry is repeated many times. In step 5031, the module 503 sends, as a retry, a command for acquiring data again from the target position set in step 5026 to the CPU 41 of the CD unit by serial communication or the like.

  In step 5041, after issuing a command by the module 503, the module 504 waits for a digital audio signal to be transmitted from the CD unit 10. When the module 501 acquires the digital audio signal, the module 504 starts comparing the newly acquired digital audio signal with the digital audio signal immediately before the data loss detection (step 5042). When the module 504 detects a coincidence portion between the old and new digital audio signals (step 5043), it resumes data transfer to the compression LSI 51 (step 5044) and clears the retry counter (step 5045).

  As described above, according to the present embodiment, the main control unit 20 side is provided with a configuration such as serial communication for notifying data loss between the CD unit 10 and another unit such as the main control unit 20. It is possible to freely set operations such as retrying to connect data missing portions or removing a song (track) being played back from the target of ripping. Therefore, the CD unit 10 side can be made very simple, and when changing the function of the entire system, the CD unit 10 side does not change anything, and other units such as the main control unit 20 are not changed. Various measures such as design changes or new designs can be made. That is, the CD unit 10 can be shared regardless of the functions of the entire system.

  The present invention can be applied to a disk device having a function of ripping a digital audio signal held on an optical disk or the like into an MP3 file or the like.

10 CD unit 20 Main control unit 30 Disc 31 Motors 32 Pickup 33 Driver IC
40 Control unit 41 CPU (in CD unit)
42 CD_LSI
43 DRAM
50 CPU (in main control unit)
51 Compression LSI
52 HDD
53 DAC
60 Speaker 70 Operation panel, LCD screen

Claims (4)

A disc device having a ripping function for compressing and recording a digital audio signal held on a disc,
A drive unit for acquiring the digital audio signal held on the disc; and a main control unit for ripping the digital audio signal;
A first communication unit that provides only the digital audio signal from the drive unit to the main control unit;
A second communication unit for transmitting and receiving an instruction command from the reproduction state of the drive unit and the main control unit;
The drive unit includes a first control unit that determines that the digital audio signal is missing, and a second control unit that transmits the digital audio signal by the first communication unit,
When the first controller determines that the digital audio signal is missing, the first controller notifies the main control unit that the digital audio signal is missing by the second communication unit;
The main control unit informs the drive unit by the second communication unit to transmit a digital audio signal from a position before the missing to the drive unit,
The second control unit transmits a digital audio signal from a position before the omission to the main control unit by the first communication unit,
The main control unit is a disc device that performs playback control using a digital audio signal from a position before the omission. The drive unit further includes a memory for shockproof playback function that temporarily holds the digital audio signal,
The first control unit determines that the digital audio signal is missing when the second control unit notifies that the memory for shockproof playback function is empty. The disk device described in 1.   The said 1st control part judges that there is a missing | missing in the said digital audio signal, when there exists a notification that the said digital audio signal cannot be acquired from the said 2nd control part. Disk unit. A drive unit for acquiring a digital audio signal held on a disc,
A first communication unit that provides only the digital audio signal is connected to the main control unit that rips the digital audio signal from the drive unit,
A second communication unit for transmitting and receiving an instruction command from the reproduction state of the drive unit and the main control unit is connected,
A first control unit that determines that the digital audio signal is missing; and a second control unit that transmits the digital audio signal by the first communication unit;
When the first controller determines that the digital audio signal is missing, the first controller notifies the main control unit that the digital audio signal is missing by the second communication unit;
The main control unit informs the drive unit by the second communication unit to transmit a digital audio signal from a position before the missing to the drive unit,
The drive unit is a drive unit that transmits a digital audio signal from a position before the omission to the main control unit by the first communication unit.