JP2013254534A - Reproducer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reproducer that allows a user to easily recognize connection between content whose reproduction is resumed and content which was reproduced last time.SOLUTION: A reproducer includes a reproduction processing unit 33. When a reproduction resumption is instructed since the reproduction stops, the reproduction processing unit 33 starts the reproduction from reproduced information before a reproduction stop position accumulated in a buffer memory 7.

Description

  The present invention relates to a disc playback apparatus for playing back content recorded on a recording medium such as a disc.

  In recent years, when playback of video / audio content recorded on a recording medium is interrupted, information including the position at which playback was interrupted is recorded, and the information recorded when playback restart is instructed is referred to. A reproduction apparatus having a resume reproduction function for resuming viewing of video / audio content from a position where reproduction is interrupted is used. Various techniques for realizing efficient data transfer in a playback apparatus having a resume playback function have been disclosed.

  For example, in the optical disk reproducing device disclosed in Patent Document 1, an overlapping portion between data already stored in the buffer memory and data to be stored in the buffer memory according to the input transfer request is detected, and the detected overlapping portion is detected. By discarding the data from the buffer memory, efficient data transfer is realized.

  In the information reproducing apparatus disclosed in Patent Document 2, when an instruction to stop reproduction is input during information reproduction, an instruction to stop reproduction and to resume reproduction is input while the reproduction information is stored in the memory. Then, the reproduction is quickly resumed by outputting the reproduction information stored in the memory.

  In the disc reproducing apparatus disclosed in Patent Document 3, information recorded on a predetermined section disc is pre-recorded from the stop position when the disc is stopped halfway, and pre-recorded information is reproduced when performing resume reproduction. In the meantime, by preparing to reproduce the information recorded on the disc, a signal is output promptly simultaneously with the reproduction command.

JP-A-11-259239 JP 2001-291328 A JP 2005-293784 A

  However, in the techniques disclosed in Patent Document 1 to Patent Document 3 described above, the reproduction is resumed from the position where the previous reproduction was stopped, and therefore, between the content that has been reproduced and the content that was reproduced the last time. There is a problem that the user's memory is discontinuous and it is difficult for the user to recognize the content whose reproduction has been resumed. In addition, since the user performs a rewinding operation to the previously played content in order to remember the connection between the content that has been resumed and the content of the previous playback, there is a problem that it takes time to reconfirm the content. there were.

  The present invention has been made to solve the above-described problems, and provides a playback device that allows a user to easily recognize the connection between content that has been played back and content that was played back last time. Objective.

  The playback device according to the present invention starts playback from information that has been played back prior to the playback stop position stored in the buffer memory when playback is instructed after playback is stopped. Is provided.

  According to the present invention, the user can easily recognize the continuity between the content in the previous reproduction and the content after the stop position.

1 is a block diagram showing a configuration of a playback device according to Embodiment 1. FIG. 3 is a block diagram showing a configuration of a decoder of the playback device according to Embodiment 1. FIG. 6 is a flowchart showing an operation at the time of content playback of the decoder of the playback device according to the first embodiment. FIG. 6 is a diagram showing a storage state at the time of content playback in the buffer memory of the playback device according to the first embodiment. 6 is a flowchart showing an operation of the decoder of the playback device according to Embodiment 1 when restarting content playback. FIG. 6 is a diagram showing an accumulation state when content reproduction is resumed in the buffer memory of the reproduction device according to the first embodiment. 4 is a flowchart showing an operation when the power of the decoder of the playback apparatus according to the first embodiment is turned off. FIG. 10 is a diagram illustrating movement of content data when the playback apparatus according to Embodiment 1 is turned off. 6 is a flowchart showing an operation when the power of the decoder of the reproduction apparatus according to the first embodiment is turned on. FIG. 6 is a diagram illustrating movement of content data when the playback apparatus according to Embodiment 1 is powered on. FIG. 6 is a diagram illustrating a storage state of video content and music content in a buffer memory of the playback device according to the first embodiment.

Embodiment 1 FIG.
FIG. 1 is a block diagram showing the configuration of a playback apparatus according to Embodiment 1 of the present invention.
The playback device 10 includes a pickup 1, a demodulator 2, a decoder 3, a D / A converter 4, an operation input unit 5, a control unit 6, a buffer memory 7, a local storage 8, and a main memory 9.
The pickup 1 reads a video / audio signal recorded on an optical disk inserted in the playback apparatus 10. The demodulator 2 demodulates the video / audio signal read by the pickup 1 into a digital signal. The demodulated video / audio signal is output to the decoder 3 via an ATA interface or the like. The decoder 3 stores the video / audio signal input from the demodulator 2 in the buffer memory 7. The decoder 3 reads out the video / audio data accumulated from the buffer memory 7 and outputs it to the D / A converter 4, or reads out the video / audio data from the memory card 40 inserted in the playback apparatus 10 and sends it to the buffer memory 7. Accumulate.

  The D / A converter 4 converts the video / audio data input from the decoder 3 into an analog signal and outputs it as a video signal and an audio signal. The operation input unit 5 includes, for example, a touch panel, a button, a keyboard, and the like, and receives a user operation input. The control unit 6 controls the pickup 1 and the decoder 3 based on a user operation input via the operation input unit 5. The buffer memory 7 is a volatile memory, and has storage areas corresponding to the optical disc 20 and the memory card 40 inserted into the playback device 10.

The local storage 8 is a non-volatile memory and is a storage area in which data can be temporarily saved when the power of the playback device 10 is turned off. For example, a large-capacity local storage 8 is mounted as standard in a BD playback device that supports BD profile 2.0 or higher, and this local storage 8 is used. The main memory 9 is a memory used by a CPU (not shown) of the playback device 10.
The optical disc 20 is, for example, a BD, a DVD-ROM, a CD, or the like. As the memory card 40, for example, various memory cards such as CompactFlash, SmartMedia, SD memory card, memory stick, MMC (registered trademark or trademark) can be applied.

Next, a detailed configuration of the decoder 3 will be described.
FIG. 2 is a block diagram showing the configuration of the decoder of the playback apparatus according to Embodiment 1 of the present invention.
The decoder 3 includes a read processing unit 31, a buffer accumulation processing unit 32, a reproduction processing unit 33, a decoding processing unit 34, and a data movement processing unit 35.
The read processing unit 31 reads content data from the memory card 40.
When the content data is reproduced, the buffer storage processing unit 32 performs a process of acquiring video / audio data after the current reproduction position from the demodulator 2 or the read processing unit 31, a so-called pre-read process, and the pre-read video / audio data. Is stored in the buffer memory 7 (hereinafter referred to as buffering processing).

  The reproduction processing unit 33 reads the content data at the current reproduction position from the buffer memory 7 and outputs the content data to the decoding processing unit 34. The decoding processing unit 34 decodes the video / audio data input from the reproduction processing unit 33 and performs video output and audio output. The data movement processing unit 35 performs a process of moving the video / audio data stored in the buffer memory 7 to the local storage 8 and storing it when a power-off request of the playback apparatus 10 is input from the control unit 6. Further, when a power-on request for the playback device 10 is input from the control unit 6, the video / audio data stored in the local storage 8 is moved to the buffer memory 7 and stored.

Next, the operation of the playback apparatus according to the first embodiment will be described focusing on the processing operation of the decoder 3. In the following description, a case where video / audio content including video and audio is reproduced will be described as an example.
First, the buffering operation during content reproduction will be described with reference to FIG. Note that FIG. 3 will be described assuming that the content reproduction process is currently ongoing.
FIG. 3 is a flowchart showing the buffering operation of the playback apparatus according to the first embodiment.
The decoder 3 refers to the control signal input from the control unit 6 and determines whether or not a content reproduction stop request has been input (step ST1). If no content playback stop request has been input (step ST1; NO), the playback processing unit 33 reads data whose playback history has not been played back (hereinafter referred to as unplayed data) from the buffer memory 7 and continues playback processing. (Step ST2). Further, the buffer accumulation processing unit 32 reads the content data input from the demodulator 2 or the read processing unit 31, and continues the process of writing to the buffer memory 7 (step ST3).

  Further, based on the data update instruction input from the control unit 6, the buffer storage processing unit 32 updates the data that has been stored in the buffer memory 7 (hereinafter referred to as “reproduced data”) (step ST4). ). The update of the reproduced data will be specifically described. A process of erasing the reproduced data from the oldest one in order of accumulation is performed so that the accumulated amount of the reproduced data in the buffer memory 7 is always a constant amount. Along with the process of erasing, a process of changing the data that has been reproduced among the unreproduced data to the reproduced data is performed. When the process of step ST4 ends, the flow returns to the determination process of step ST1, and the above-described process is repeated.

  On the other hand, when a content playback stop request is input (step ST1; YES), the playback processing unit 33 stops reading unplayed data from the buffer memory 7 and playback processing (step ST5). Further, the buffer storage processing unit 32 stops reading the content data from the demodulator 2 or the read processing unit 31 (step ST6), and erases unreproduced data stored in the buffer memory 7 (step ST7). Exit.

FIG. 4 is a diagram showing an accumulation state of the buffer memory 7 corresponding to the flowchart of FIG.
FIG. 4A shows the accumulation state of the buffer memory 7 during content reproduction, and FIG. 4B shows the accumulation state of the buffer memory 7 when the content reproduction is stopped.
In FIG. 4A, an area A represents an accumulable area of the buffer memory 7, an area B represents an accumulated area for reproduced data, and an area C represents an accumulated area for unreproduced data.
The accumulated amount of the reproduced data shown in the area B is defined in advance, and the reproduced data having the oldest accumulation time is sequentially deleted so as to maintain the prescribed accumulated amount.
The unreproduced data indicated by the area C is accumulated by a buffering process for accumulating the pre-read content data. By this buffering process, a predetermined amount of unreproduced data is accumulated from the current reproduction position O shown in FIG.

  When content is played back in the accumulation state of FIG. 4A, the start point b1 of the area B moves in the direction of new data by erasing old played back data (see arrow b1 '). In addition, the current reproduction position O also moves in the direction of new data (see arrow O ′), and as the reproduction position O moves, unreproduced data is switched to reproduced data. Furthermore, since the prefetching process of the content data is continued, the end point c1 of the area C moves in the direction of the new data (see arrow c1 ′). As described above, as the content is reproduced, the start point b1, the reproduction position O, and the end point c1 move from the old data to the new data.

When the reproduction of the content is stopped, only the reproduced data indicated by the area B is stored in the buffer memory 7 as shown in FIG.
The end point b2 of the area B is a stop position where the reproduction is stopped in the previous reproduction process, and the start point b3 of the area B which is a predetermined amount backward from the end point b2 is a resume position where the reproduction of the content is resumed in the next reproduction process. It is. While the reproduction process is performed from the start point b3 to the end point b2 in the next reproduction process, a buffering process of unreproduced data corresponding to the region C shown in FIG. 4A is executed.

  Therefore, the amount of data stored in the area B is pre-read from the optical disc 20 or the memory card 40 for content data after the end point b2 within the repeated playback time from the start point b3 to the end point b2 in the next playback process. It is assumed that the accumulated amount corresponds to more than the time required for the buffering process to be accumulated. Further, an accumulation amount corresponding to a time at which the user can recognize which point was reproduced in the previous reproduction process, that is, a time at which the user's memory is restored may be taken into consideration.

Next, the reproduction restart operation after the reproduction is stopped will be described.
In the reproduction restart operation after the reproduction is stopped, reproduction is repeatedly performed from the beginning of the reproduced content data stored in the buffer memory 7 (hereinafter referred to as overlap reproduction). While the reproduced content data is being reproduced, the reproduction device 10 spins up the optical disc 20, the decoder 3 reads out the content data from the optical disc 20 or the memory card 40, and the content data quickly from the previous reproduction stop position. Is written into the buffer memory 7 so that it can be decoded.

FIG. 5 is a flowchart showing the playback restart operation of the playback apparatus according to Embodiment 1 of the present invention.
The decoder 3 refers to the control signal input from the control unit 6 and determines whether or not a content reproduction restart request has been input (step ST11). When an instruction to resume content playback is given (step ST11; YES), the playback processing unit 33 starts playback of the played content data stored in the buffer memory 7 (step ST12). Further, the buffer accumulation processing unit 32 reads the content data input from the demodulator 2 or the reading processing unit 31 and writes it in the buffer memory 7 (step ST13).

  The reproduction processing unit 33 determines whether or not the end point of the reproduced content data has been reached, that is, whether or not the stop position in the previous reproduction process has been reached (step ST14). If the stop position in the previous reproduction process has not been reached (step ST14; NO), the process returns to step ST12 and the reproduction of the reproduced content data is continued. On the other hand, when the stop position in the previous reproduction process is reached (step ST14; YES), the reproduction processing unit 33 continues to reproduce the unreproduced data stored in the buffer memory 7 in the process of step ST13 (step ST15). ). Further, the buffer accumulation processing unit 32 updates the reproduced data in the buffer memory 7 based on the data update instruction input from the control unit 6 (step ST16). Thereafter, the flow proceeds to the processing of step ST1 of the flow shown in FIG.

FIG. 6 is a diagram showing the accumulation state of the buffer memory corresponding to the flowchart of FIG. 5, and shows the accumulation state of the buffer memory when the reproduction is resumed.
When content reproduction resumes, overlapping reproduction is performed from the start point b3 to the end point b2 of the region B. At the current playback position b4 shown in the example of FIG. 6, it is determined in the determination process of step ST14 that the stop position (end point b2) in the previous playback process has not been reached, and the playback of the content data that has been played back in the region B is performed. Will continue. In addition, while the reproduction is performed from the start point b3 to the end point b2 of the area B, the buffer accumulation processing unit 32 reads the content data from the demodulator 2 or the reading processing unit 31, and is not reproduced in the area C. Performs buffering processing to accumulate as data.

  As described above, when the content reproduction is resumed, the reproduction of the reproduced data is started using the content data stored in the buffer memory 7, so that the content data is earlier than when reading the content data from the optical disc 20 or the memory card 40. Reproduced data can be output. In addition, since the amount of reproduced data that can store a predetermined amount of unreproduced data from the stop position in the previous reproduction process is accumulated, spin-up of the optical disc 20 is performed simultaneously with overlapping reproduction of the reproduced data. In addition, the content data can be read from the optical disc 20 or the memory card 40, and the reproduction of the unreproduced content data can be continued smoothly even when the stop position in the previous reproduction process is reached.

Next, an operation when the power of the playback apparatus 10 is turned off will be described.
First, since the buffer memory 7 is composed of a volatile memory, the data in the buffer memory 7 is erased when the power of the reproducing apparatus 10 is turned off. Therefore, when a power-off request is input via the operation input unit 5, a process of moving the data stored in the buffer memory 7 to the local storage 8 configured by a nonvolatile memory and temporarily storing it is performed. Do.

FIG. 7 is a flowchart showing the operation of the playback apparatus when the power is turned off according to Embodiment 1 of the present invention.
When the decoder 3 receives the power-off request input from the control unit 6 (step ST21), the data movement processing unit 35 performs a save process for moving the reproduced data in the buffer memory 7 to the local storage 8 (step ST22). ). In step ST22, the reproduced data accumulated in all the storage areas corresponding to various storage media such as the storage area corresponding to the optical disk in the buffer memory 7 and the storage area corresponding to the micro memory card are moved to the local storage 8. Let When the process of step ST22 is completed, the decoder 3 executes a power-off process (step ST23) and ends the process. Note that the power-off processing of the decoder 3 is the same operation as that of the prior art, and thus description thereof is omitted.

FIG. 8 is a diagram showing an accumulation state of the buffer memory 7 and the local storage 8 corresponding to the flowchart of FIG.
8A shows the storage state of the local storage, FIG. 8B shows the storage state of the buffer memory corresponding to the optical disk, and FIG. 8C shows the storage state of the buffer memory corresponding to the memory card.
In the saving process by the data movement processing unit 35, the reproduced data D in the buffer memory 7a corresponding to the optical disk shown in FIG. 8B is moved to the local storage 8 (see arrow d), and shown in FIG. 8C. The reproduced data E in the buffer memory 7b corresponding to the memory card 40 is moved to the local storage 8 (see arrow e) and stored. Information that can identify the storage areas 7a and 7b of the buffer memory 7 that is the movement source is added to each data that is moved to the local storage 8 by the saving process.

Next, the operation when the playback apparatus 10 is turned on will be described.
When the power of the playback device 10 is turned on, the played data stored in the local storage 8 is moved to each storage area in the corresponding buffer memory 7. Thereby, it is possible to return to the state of the buffer memory 7 before the power is turned off in the previous process.

FIG. 9 is a flowchart showing the operation of the playback apparatus when the power is turned on according to Embodiment 1 of the present invention.
When the decoder 3 receives a power-on request input from the control unit 6 (step ST31), the decoder 3 executes a power-on process (step ST32). Note that the power-on process of the decoder 3 is the same operation as in the prior art, and thus the description thereof is omitted. Subsequently, the data movement processing unit 35 refers to the local storage 8, refers to the identification information of the movement source of the stored reproduced data, and performs a return process for moving to the corresponding storage area in the buffer memory 7. (Step ST33), the process ends.

FIG. 10 is a diagram showing the accumulation state of the buffer memory and the local storage corresponding to the flowchart of FIG.
10A shows the storage state of the local storage, FIG. 10B shows the storage state of the buffer memory corresponding to the optical disc, and FIG. 10C shows the storage state of the buffer memory corresponding to the memory card 40.
In the restoration process by the data movement processing unit 35, the reproduced data D is stored in the buffer memory 7a corresponding to the optical disc 20 based on the identification information of the movement source of the reproduced data in the local storage 8 shown in FIG. It is moved and stored (see arrow d ′ in FIG. 10), and the reproduced data E is moved and stored in the buffer memory 7b corresponding to the memory card 40 (see arrow e ′ in FIG. 10).

  When the storage state of the buffer memories 7a and 7b is restored to FIGS. 10B and 10C and a content reproduction restart request is input, the processing shown in the flowcharts of FIGS. 5 and 3 described above is performed. The reproduced data is reproduced and the unreproduced data is reproduced.

  As shown in FIGS. 8 and 10, since the buffer memory 7 includes buffer memories 7a and 7b corresponding to the respective storage media such as the optical disk 20 and the memory card 40, the buffer accumulation processing unit 32 reads the content data. Is changed from the optical disk 20 to the memory card 40, or even when the memory card 40 is changed to the optical disk, the reproduced data stored in the buffer memory 7 is used for resuming the next reproduction process without clearing the reproduced data. be able to.

  As described above, according to the first embodiment, a predetermined amount of reproduced data is accumulated when reproduction of content is stopped, and the accumulated reproduction has been performed when reproduction from the stop position is instructed. Since the data is configured to be reproduced repeatedly, when the reproduction is resumed from the stop position in the previous reproduction, the user can grasp the content of the content a predetermined amount before the stop position in the previous reproduction. It is possible to easily grasp the continuity with the contents of the subsequent contents. Thereby, the user does not need to perform a rewinding operation for confirming the content of the content before the stop position, and can smoothly resume the reproduction.

  Further, according to the first embodiment, when reproduction from the previous stop position is instructed, while the reproduced data that has been accumulated is being reproduced repeatedly, unreproduced content data after the previous stop position The content after the previous stop position can be reproduced without causing the user to wait.

  Further, according to the first embodiment, since the storage area corresponding to each of the plurality of recording media is provided in the buffer memory 7, the reproduced data can be obtained even when the recording medium to be reproduced is switched. Can continue to accumulate.

  Further, according to the first embodiment, when a power-off request is input, the data accumulated in the buffer memory 7 is moved to the local storage 8 constituted by a nonvolatile memory and temporarily stored. At the same time, since the data stored in the local storage 8 is moved to the buffer memory 7 when a power ON request is input, the reproduced data is stored even when the power of the playback device is turned off. I can leave it to you.

  In the first embodiment described above, the configuration in which the buffer accumulation processing unit 32 erases the unreproduced data accumulated in the buffer memory 7 when the content reproduction is stopped has been described. A part or all of the data may be accumulated.

Embodiment 2. FIG.
In the first embodiment described above, the processing for video / audio content including video and audio is shown. However, in the second embodiment, music content containing only music and video / audio content including video and audio are reproduced separately. A configuration for performing the processing will be described.
First, when playing music content, there is no need for clear recognition of where the previous playback process was played, and when there is a discontinuity in the user's memory regarding the previous playback and restarting playback from the stop position. However, there is no great discomfort for the user.
Therefore, in the second embodiment, it is determined whether the content to be reproduced by the reproduction processing unit 33 is video content or music content, and the accumulated amount of reproduced data in the buffer memory 7 is changed according to the content type to be reproduced. The structure to be made is shown.

FIG. 11 is a diagram illustrating a storage state of the buffer memory 7 of the playback device according to the second embodiment. FIG. 11A illustrates an example of storing the reproduced data F of the video content, and FIG. 11B illustrates the music content. An example of storing the reproduced data G of FIG.
In FIG. 11, f1 is a stop position in the previous reproduction of the video content, and g1 is a stop position in the previous reproduction of the music content. The accumulated amount g2 of the reproduced data G of the music content is set to be smaller than the accumulated amount f2 of the reproduced data F of the video content.

  Note that, as shown in FIG. 11, even when the stored amount of the reproduced data of the music content is set to be small, at least the spin-up of the optical disk 20 or the optical disk 20 or the memory is performed within the overlapping reproduction time of the reproduced data. The storage amount corresponding to the time required for the buffering process for pre-reading and storing the content data from the card 40 is maintained.

  The buffer storage processing unit 32 determines whether the playback target is video content or music content. When the content to be stored is managed in the file format, the extension of the file is referred to, and the determination is made based on the disc type of the other optical disc 20 and the like. When determining based on the extension of the file, for example, it can be determined by detecting a description of an extension indicating a music data file such as “mp3” or “mdi” from the file name. When determining based on the disc type, for example, when the optical disc is a CDDA (Compact Disc Digital Audio) or DVD-Audio, it is determined that the content is music content. On the other hand, in the case of an optical disc other than those described above, for example, BD-ROM, DVD-ROM, and CD-ROM, it is determined that the content is video content.

  As described above, according to the second embodiment, the accumulated amount of the reproduced data of the music content is suppressed to be smaller than the accumulated amount of the reproduced data of the video content. In the reproduction of music content that does not require a clear recognition of whether or not it was being reproduced, the amount of data to be duplicated reproduction can be kept to a minimum, and efficient reproduction processing can be performed.

  Further, according to the second embodiment, when resuming the reproduction of music content, at least the time required for the spin-up of the optical disc and the buffering process for prefetching and storing the content data is set as the overlap reproduction time. Since it was comprised so that the waiting time with respect to the reproduction | regeneration processing from the last stop position can be suppressed.

  In the present invention, within the scope of the invention, any combination of the embodiments, or any modification of any component in each embodiment, or omission of any component in each embodiment is possible. .

  DESCRIPTION OF SYMBOLS 1 Pickup, 2 Demodulator, 3 Decoder, 4 D / A converter, 5 Operation input part, 6 Control part, 7 Buffer memory, 8 Local storage, 9 Main memory, 10 Playback apparatus, 20 Optical disk, 31 Reading process part, 32 Buffer accumulation processing unit, 33 reproduction processing unit, 34 decoding processing unit, 35 data movement processing unit, 40 memory card.

Claims (5)

A reading unit that reads information recorded on the information recording medium; a buffer memory that temporarily stores information read from the information recording medium by the reading unit; and information that is read in the order in which the information is stored in the buffer memory In a playback device including a playback processing unit that performs playback,
The reproduction processing unit starts reproduction from reproduced information before a reproduction stop position stored in the buffer memory when an instruction to resume reproduction is given after the reproduction is stopped. Playback device.   The buffer memory uses, as the reproduced information before the reproduction stop position, reproduced information for a reproduction time necessary for reading information after the reproduction stop position from the information recording medium by the reading unit. The reproduction apparatus according to claim 1, wherein the reproduction apparatus accumulates the reproduction apparatus.   The buffer memory includes an area for each type of the information recording medium, and stores information that has been reproduced before the reproduction stop position for each type of the information recording medium in the area of the corresponding type. The reproducing apparatus according to claim 2, wherein:   The buffer memory stores reproduced information for a reproduction time set for each type of information recorded on the information recording medium as reproduced information before the reproduction stop position. The reproducing apparatus according to any one of claims 1 to 3.   5. The apparatus according to claim 1, further comprising: a non-volatile memory that temporarily saves information that has been reproduced before the reproduction stop position stored in the buffer memory when the power is cut off. The reproducing apparatus according to claim 1.

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