JP2010135033A - Recording medium driving device and data providing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an audio reproduction apparatus minimizing a load in a host apparatus. <P>SOLUTION: A recording medium driving apparatus includes: a reading means reading content data from a recording medium; a data transmitting means for transmitting data read by the reading means to a prescribed host apparatus; a buffer temporarily accumulating the content data read by the reading means; a decoding means for decoding the data accumulated in the buffer and output the data as a reproduction signal; and a reproduction signal transmitting means for transmitting the reproduction signal from the decoding means to the host apparatus, and the apparatus further includes a data providing means for causing the reading means to intermittently read the content data and providing the buffer with the data (steps 31 to 35) and, in a period without the reading, reading the data separately from the above reading and providing the data transmitting means with the data (steps 36 to 40). <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a recording medium driving apparatus that reads content data from a recording medium, and a data supply method suitable for the apparatus.

  FIG. 4 shows a state in which ripping is performed in a conventional audio reproducing apparatus having an optical disk drive and a host device. The optical disk drive 50 can be connected to the host device 40 through two types of interfaces, a data output interface and an audio output interface. When ripping the optical disc 51, the content being ripped is played back in parallel with the ripping. For example, ripping is started from the first song of a CD, and playback from the first song is started at the same time.

  At that time, the optical disc drive 50 transfers the ripped data read from the optical disc 51 to the host device 40 via the data output interface, and uses the buffer memory 52 and the decoder 53 provided therein for the reproduction of the content. There is nothing. The host device 40 stores the transferred ripped data in a large-capacity storage device such as the hard disk 41, reads the stored ripped data again, decodes it by its own decoder 42, and reproduces the content.

  FIG. 5 shows a state where normal reproduction of the optical disk is performed in the apparatus shown in FIG. When performing normal playback of the optical disk 51, the optical disk drive 50 temporarily stores the data read from the optical disk 51 in the buffer memory 52, reads the stored data, decodes it by the decoder 53, and sends it via the audio output interface. To the host device 40. The host device 40 outputs reproduced sound based on the supplied audio signal.

  As a technique that enables content ripping and playback to be performed in parallel, for example, a digital audio recording device that can perform playback and data extraction of an audio CD in parallel and in cooperation is known. (See Patent Document 1). In this apparatus, two FIFO buffers are provided, one used for content reproduction and the other used for content ripping (data extraction).

JP 2002-203361 A

  However, according to the prior art of FIGS. 4 and 5 described above, a large processing capacity is required for the host device 40 during ripping. That is, the host device 40 receives ripped data from the optical disk drive 50, writes the received ripped data to the hard disk 41, and reads the written ripped data from the hard disk 41 again and decodes it by the decoder 42. Need to be executed. For this reason, a very high processing capability is required for the CPU of the host device 40. As a result, the criteria for selecting a microprocessor for the host device 40 become strict, and the cost of the host device 40 increases.

  In addition, when the processing capability of the microprocessor of the host device 40 is low, it is necessary to design with a view to adding a separate processor. As a result, not only the cost increases, but also the circuit configuration becomes complicated and the power consumption increases.

  In addition, although the optical disc drive 50 itself has a function of outputting an audio signal, a decoder 42 must be separately installed on the host device 40 side. As a result, it becomes difficult to match the quality of the audio signal output from the optical disc drive 50 itself with the quality of the audio signal output from the host device 40 during ripping.

  In addition, since writing to and reading from the hard disk 41 are alternately performed at high speed, the seek frequency in the hard disk 41 is extremely increased. In particular, when the host device 40 is a navigation device that stores map data on a hard disk, map data reading, ripping data writing, and ripping data reading occur at the same time. The Although it is possible to reduce the seek frequency in the hard disk 41 by securing a buffer memory for audio playback on the host device 40 side, it is necessary to manage the remaining buffer capacity, the transfer rate of ripped data, etc. on the host device 40 side. This is difficult to realize.

  An object of the present invention is to provide an audio reproducing apparatus capable of reducing the load on a host apparatus as much as possible with a simple configuration in view of the problems of the conventional technology.

  To achieve this object, a recording medium driving apparatus according to a first aspect of the present invention is a reading means for reading content data from a recording medium, and a data transmission for transmitting the data read by the reading means to a predetermined host device. Means, a buffer for temporarily storing content data, a decoding means for decoding the data stored in the buffer and outputting it as a reproduction signal, and transmitting a reproduction signal from the decoding means to the host device The content data is intermittently read by the reproduction signal transmitting means and the reading means to be supplied to the buffer, and the data transmission is performed separately from the reading during the period when the reading is not performed. Data supply means for supplying to the means.

  A recording medium driving apparatus according to a second invention is the recording medium driving device according to the first invention, wherein the content data includes audio and image or moving image category data, and the supply means supplies data to the buffer category. And the category of data supplied to the data transmission means is different or only partially matched.

  According to a third aspect of the present invention, there is provided a recording medium driving device according to the first or second aspect, wherein data about a plurality of contents is recorded on the recording medium, and the content of data supplied to the buffer by the supply means The content of data supplied to the data transmission means is different.

  According to a fourth aspect of the present invention, there is provided a data supply method comprising: a reading step for reading content data from a recording medium; a data transmission step for transmitting data read by the reading step to a predetermined host device; A buffer process for accumulating in the buffer, a decoding process for decoding the data accumulated in the buffer and outputting it as a reproduction signal, and a reproduction signal for transmitting the reproduction signal output by the decoding process to the host device The content data is read intermittently by the transmitting step and the reading step and accumulated by the buffer step, and is read separately from the reading and is transmitted by the data transmitting step in a period when the reading is not performed. And a data supply process for supplying to the host device. To.

  According to the present invention, the load on the host device can be reduced with a simple configuration.

  FIG. 1 is a block diagram showing the configuration of an audio playback apparatus according to an embodiment of the present invention. As shown in the figure, this apparatus includes a host apparatus 10 and an optical disk drive 20 that supplies ripped data and audio signals to the host apparatus 10. The host device 10 includes a hard disk 11 that stores ripped data and the like, and a decoder 12 that decodes audio data read from the hard disk 11, and outputs reproduced sound based on audio signals from the optical disk drive 20 and the decoder 12. And the function of storing the ripped data from the optical disk drive 20 in the hard disk 11. The optical disk drive 20 can be connected to the host device 10 through two types of interfaces, a data output interface and an audio output interface. The optical disc drive 20 can output ripped data to the host apparatus 10 via the data output interface and output an audio signal via the audio interface.

  The optical disk drive 20 includes a buffer memory 22 that temporarily stores audio data read from the optical disk 21, a decoder 23 that reads and decodes the audio data stored in the buffer memory 22, and an audio data read from the optical disk 21 as ripped data. The switch 24 is provided for switching whether to output to the buffer memory 22 or to supply to the buffer memory 22. The optical disk drive 20 reads audio data from the optical disk 21 and outputs the audio data to the host apparatus 10 as an audio signal via the switch 24, the buffer memory 22, and the decoder 23, or as the ripped data via the switch 24. The function to output to.

  FIG. 2 is a flowchart showing processing in the optical disc drive 20 when ripping the contents of the optical disc 21. This process is performed based on a predetermined program by the CPU of the optical disk drive 20 (not shown). At the time of ripping, the audio signal of the content is also supplied to the host device 10 in parallel, and the reproduction sound of the content is output in parallel at the host device 10. At this time, the content data on the optical disc 21 is read twice as ripping data and reproduction data.

  That is, the reproduction data is sequentially read through the buffer memory 22 for reproduction of the content, decoded by the decoder 23, and supplied to the host device 10 as an audio signal. At this time, the writing to the buffer memory 22 is performed at a higher speed than the reading from the buffer memory 22, and thus is performed intermittently (steps 31 to 35). During the period when writing to the buffer memory 52 is not performed, the ripping data is read from the optical disc 21 (steps 36 to 40). Note that reading from the buffer memory 22 is continuously performed until the reproduction of the content to be ripped is completed. The remaining capacity of the buffer memory 22 increases by the read amount and decreases by the written amount.

  That is, as shown in the figure, when the process is started, the optical disc drive 20 first reads out the reproduction data and writes it into the buffer memory 22 until the remaining amount of the buffer reaches a predetermined upper limit (steps 31 to 31). 35). That is, in step 31, reading of reproduction data and writing to the buffer memory 22 are started. Next, in step 32, it is determined whether or not reading of reproduction data has been completed for all data of the ripping target content. If it is determined that the process has not been completed, it is determined in step 33 whether or not the remaining capacity of the buffer memory 22 has exceeded the upper limit value. If it is determined that the value is not equal to or greater than the upper limit value, the process returns to step 32. If it is determined that the value is equal to or greater than the upper limit value, the process proceeds to step 34, and reading of reproduction data and writing to the buffer memory 22 are stopped. Further, in step 35, the address on the optical disc 21 where the reading is stopped is stored so that the reading can be resumed from the point where the reading was stopped.

  Next, the ripping data is read and transmitted to the host device 10 until the remaining amount of the buffer reaches a predetermined lower limit value and the reading of the reproduction data is resumed (steps 36 to 40). That is, first, in step 36, reading of ripping data from the optical disc 21 and transmission to the host device 10 are started. Next, in step 37, it is determined whether or not the reading of ripping data has been completed for all data of the ripping target content. If it is determined that the process has not been completed, it is determined in step 38 whether or not the remaining capacity of the buffer memory 22 has become the lower limit value or less. If it is determined that the value is not less than the lower limit, the process returns to step 37. If it is determined that the value is lower than the lower limit value, the process proceeds to step 39, and reading of ripping data and transmission to the host device 10 are stopped. Further, in step 40, the address on the optical disc 21 where the reading is stopped is stored so that the reading can be resumed from the point where reading of the ripping data is stopped. Then, the process returns to step 31. However, the reading of the reproduction data in step 31 is started from the address stored in step 36, and the reading of the ripping data in step 36 is started from the address stored in step 40.

  If it is determined in step 32 that the reproduction data has been read, the process proceeds to step 37. If it is determined in step 37 that the ripping data has been read, the process proceeds to step 41. In step 41, it is determined whether or not any reading is completed. If it is determined that any reading is not completed, the process returns to step 31. If it is determined that both have been completed, the processing in FIG. 2 is terminated.

  FIG. 3 is a timing chart showing the timing of reading the reproduction data and ripping data from the optical disc 21 in the processing of FIG. The ripping operation is started, and reading of reproduction data and writing to the buffer memory 22 are started at time t1 (step 31). Thereafter, when the remaining capacity of the buffer memory 22 reaches a predetermined upper limit value at time t2, reading of reproduction data and writing to the buffer memory 22 are stopped (step 34). At the same time, reading of ripping data and transmission to the host device 10 are started (step 36). Thereafter, when the remaining memory capacity of the buffer memory 22 reaches a predetermined lower limit at time t3, reading of ripping data and transmission to the host device 10 are stopped (step 39). At the same time, reading of the reproduction data and writing to the buffer memory 22 are started from the point where reading of the reproduction data is stopped (step 31). Thereafter, the reading of the reproduction data and the writing to the buffer memory 22 and the reading of the ripping data and the transmission to the host device 10 are repeated in the same manner.

  During this time, in the optical disk drive 20, the reproduction data in the buffer memory 22 is decoded by the decoder 23 and supplied to the host device 10 as an audio signal. In the optical disc drive 20, a reproduction sound is output based on the supplied audio signal. Further, the ripping data transmitted from the optical disk drive 20 is written as ripped data on the hard disk 11.

  According to the present embodiment, when the content is played back simultaneously with the ripping of the content, the host device 10 supports from the optical disc drive 20 even during the period when the ripped data from the optical disc drive 20 is being written to the hard disk 11. Therefore, the playback sound can be output based on the audio signal. In other words, it is not necessary to perform writing to the hard disk 11 and reading and decoding of the written data in parallel, and only the processing capacity of the CPU is consumed for communication with the optical disk drive 20 and writing to the hard disk 11. Therefore, the load on the CPU can be reduced. Therefore, the selection criteria for the microprocessor in the host device 10 can be relaxed, and the manufacturing cost of the host device 10 can be reduced.

  This also eliminates the need to add another processor even when the processing capability of the microprocessor of the host device 10 is low. Therefore, this can also reduce the cost, simplify the circuit configuration, and suppress power consumption.

  In addition, since the decoder 23 in the optical disc drive 20 is used for outputting the reproduction sound that is performed in parallel with the ripping, the quality of the reproduction sound at the time of reproducing the contents of the normal optical disc, and the reproduction sound during the ripping Can be matched with quality. Note that the playback of normal optical disk content is performed by the host device 10 based on the audio signal supplied by the optical disk drive 20 via the buffer memory 22 and the decoder 23, as in the case of playback during ripping. This is done by outputting.

  Further, while the ripping is being performed, the host device 10 only needs to concentrate on writing to the hard disk 11, so that an increase in seek frequency in the hard disk 11 can be prevented. In particular, when the host device 10 is a navigation device that stores map data on the hard disk 11, reading of the ripped data recorded on the hard disk 11 does not occur, so the seek frequency is reduced and the performance degradation of the navigation function is minimized. Can be suppressed. Further, since it is not necessary to manage the remaining amount of buffer, the transfer rate of ripped data, etc., which are necessary if a buffer is provided on the host device 10 side, the host device 10 can be configured simply.

  Further, the audio reproducing apparatus according to this embodiment can be implemented only by changing software in an existing audio reproducing apparatus having a buffer memory and a decoder in the optical disk drive. In other words, in order to realize an optical disc drive that enables audio output by itself, it is essential to install a buffer memory in order to temporarily store audio data, but this embodiment uses this feature. By alternately repeating the accumulation of the audio data in the buffer memory and the transfer of the audio data to the host device side, the content can be reproduced and ripped simultaneously.

  In addition, since the decoder 23 in the optical disk drive 20 is used for outputting reproduced sound that is performed in parallel with the ripping, the decoder 12 on the host device 10 side can be dispensed with. However, when the host apparatus 10 performs reproduction based on the ripped data recorded on the hard disk 11 after completion of ripping, the decoder 12 is necessary.

  Note that the present invention is not limited to the above-described embodiment, and can be appropriately modified and implemented. For example, in the above description, the audio reproducing apparatus including the optical disk drive has been described as an example. However, the present invention is not limited thereto, and the audio, image, or moving image reproducing function using the recording medium, and the recording medium data are directly acquired. As long as it is a device having a function (ripping function), the present invention can be implemented as such a device.

  In the above description, the case where ripping and reproduction are performed in parallel for the same audio content has been described. However, the content to be reproduced and the content to be ripped need not be of the same category or the same content. . The image data portion may be acquired while reproducing the audio portion of a certain content, or another moving image content may be ripped while reproducing the certain audio content. That is, when the content data includes audio and image or video category data, the data category included in the data supplied to the buffer and the data category included in the data supplied as ripped data May be different or only partially matched.

  Further, in the above description, the case where ripping and reproduction is performed for an optical disk storing audio content data has been described. Instead, while reproducing the moving image content using the optical disk storing moving image content data, At the same time, the present invention can be applied to the case of ripping moving image content data to the hard disk of the host device.

  Further, using an optical disk storing audio data and image data, the image data may be copied to the hard disk of the host device and displayed on the display device while reproducing the audio data.

  Further, a portable player storing audio data may be connected to the host device, and the audio data may be copied to the hard disk of the host device while reproducing the audio data with the portable player.

It is a block diagram which shows the structure of the audio reproduction apparatus which concerns on one Embodiment of this invention. 3 is a flowchart showing processing in the optical disc drive when ripping is performed in the apparatus of FIG. 1. 3 is a timing chart showing timings of reading data for reproduction and ripping from an optical disc in the process of FIG. It is a figure which shows a mode when performing ripping in the conventional audio reproduction apparatus. FIG. 5 is a diagram showing a state when normal reproduction of an optical disc is performed in the apparatus of FIG. 4.

Explanation of symbols

  10, 40: host device, 11, 41: hard disk, 12, 42: decoder, 20, 50: optical disk drive, 21, 51: optical disk, 22, 52: buffer memory, 23, 53: decoder, 24: switch.

Claims (4)

Reading means for reading content data from the recording medium;
Data transmitting means for transmitting data read by the reading means to a predetermined host device;
A buffer that temporarily stores content data;
Decoding means for decoding the data stored in the buffer and outputting it as a reproduction signal;
Reproduction signal transmission means for transmitting the reproduction signal from the decoding means to an external device;
Data supply means for intermittently reading the content data by the reading means and supplying the data to the buffer, and reading the data separately from the reading and supplying the data to the data transmitting means during a period when the reading is not performed A recording medium driving device comprising: The content data includes audio and image or video category data,
2. The recording medium driving apparatus according to claim 1, wherein a category of data supplied to the buffer by the supply unit is different from or partially coincident with a category of data supplied to the data transmission unit. . Data on a plurality of contents is recorded on the recording medium,
3. The recording medium driving device according to claim 1, wherein the data content supplied to the buffer by the supply unit is different from the data content supplied to the data transmission unit. A reading step of reading content data from the recording medium;
A data transmission step of transmitting data read by the reading step to a predetermined host device;
A buffer process for temporarily storing content data in the buffer;
Decoding the data stored in the buffer and outputting as a reproduction signal;
A reproduction signal transmission step of transmitting the reproduction signal output by the decoding step to the host device;
The content data is intermittently read by the reading step and accumulated by the buffer step, and is read separately from the reading and is sent to the host device by the data transmission step in a period when the reading is not performed. A data supply method comprising: a data supply step of supplying data.

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