JP4329005B2 - Reproduction apparatus and reproduction management method for reproduction apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a playback apparatus and a playback management method for the playback apparatus, and is suitable for application to, for example, a portable digital player adapted to be able to use both a built-in storage medium and a removable storage medium.
[0002]
[Prior art]
In recent years, portable digital players that use a semiconductor memory element such as a flash memory as a storage medium (media) and record and reproduce audio data such as music and voice on the semiconductor memory element have been put into practical use ( For example, see Patent Document 1). Some of such portable digital players have a built-in storage medium, and some are configured to be used with a removable storage medium that is detachable.
[0003]
In practice, in a portable digital player, a list for each audio data stored in a storage medium (this is called a playlist) is created, and audio data is reproduced according to the playlist.
[0004]
In this playlist as reproduction management information, each audio data stored in a storage medium is managed by being assigned to a reproduction unit called a track. Each track is given a unique track number, and a group is composed of a plurality or a single track.
[0005]
That is, FIG. 6 shows the structure of the playlist 50. For example, the track number 1, the track number 2 and the track number 3 are in the group GP1, the track number 4, the track number 5 and the track number 6 are in the group GP3. , Track number 7 and track number 8 are shown. Incidentally, the group GP1 to the group GP3 are, for example, a group name given to each album CD (Compact Disk) or a group name given to a track group in which a user arbitrarily collects a plurality of tracks. Type digital players can also manage playback in groups.
[0006]
By the way, in recent years, a two-media portable digital player that has an internal storage medium and can be used with a removable storage medium has been proposed. In a two-media combination type portable digital player, a built-in storage medium and a removable storage medium can be used in combination, which is considered to improve convenience.
[0007]
The portable digital player of the two-media combination type creates a playlist only with the tracks stored in the built-in storage medium when the removable storage medium is not attached, and in the state where the removable storage medium is attached. Integrates the track stored in the internal storage medium and the track stored in the removable storage medium to create a playlist.
[0008]
[Patent Document 1]
Japanese Patent Laid-Open No. 2001-311104
[Problems to be solved by the invention]
[0010]
Here, in such a dual-media portable digital player, it is assumed that a removable storage medium is newly attached during a reproduction operation in a state where the removable storage medium is not attached. In this case, since only the tracks stored in the built-in storage medium are described in the playlist, the tracks of the removable storage medium not described in the playlist are not reproduced.
[0011]
Further, it is assumed that the removable storage medium is attached / detached during a reproducing operation in a state where the removable storage medium is mounted in a portable digital player of two media combination type. In this case, since the tracks stored in the detachable removable storage medium are also described in the playlist, there are cases where the track specified in the playlist cannot be reproduced.
[0012]
As described above, in a portable digital player using two media, if a removable storage medium is attached or detached during the reproducing operation, a discrepancy occurs between the reproducible track and the contents of the playlist, and the reproducing operation is performed. There was a problem that could cause trouble.
[0013]
The present invention has been made in consideration of the above points, and even when a removable storage medium is detached during reproduction, the reproduction management information is appropriately updated while continuing reproduction, thereby further improving the usability of the user. The present invention intends to propose a playback apparatus and a playback management method for the playback apparatus that can be improved.
[0014]
[Means for Solving the Problems]
Content in the present invention for solving the above problems, the content data stored in the first storage medium and reproduced according to the first playlist, also stored in the second storage medium that can detachably mounted manages the playback means you reproduce the data in accordance with the second playlist, and detachable monitoring means for monitoring a removably detachable second storage medium can be attached, the first playlist and the second playlist When the second storage medium is loaded during reproduction of content data in accordance with the first playlist, the playlist management means includes the first playlist and the second playlist. The reconstructed playlist created by reconstructing the first playlist and the second playlist using both of them is managed, and the reproducing means Reproducing the content data according to the list, while reproducing the content data in accordance with the first playlist, when the second storage medium is detached, the playlist manager manages only the first playlist, playback The means reproduces the content data stored in the first storage medium according to the first playlist.
[0016]
As a result, even if a detachable second recording medium is loaded during reproduction of content data by the first recording medium, the first play list of the first recording medium and the second play of the second recording medium Since the list can be managed comprehensively, the content data in the second playlist can be reproduced after the content data in the first playlist is reproduced.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
[0018]
In FIG. 1, reference numeral 1 denotes a dual-media portable digital player (hereinafter referred to as a portable digital player) as a playback apparatus according to the present invention, which is a work area for a CPU (Central Processing Unit) 2. A RAM (Random Access Memory) 3 to be used is connected, and a basic program and various application programs are developed and executed in the RAM 3 so as to perform overall control of the portable digital player 1.
[0019]
In the portable digital player 1, a display unit 4 formed of a liquid crystal display for displaying various information such as an operation mode such as PLAY, REV, and REC, a music number, an elapsed playback time, and a remaining battery level. , An operation unit 5 for giving various commands from a user, a NAND flash memory (hereinafter referred to as a flash memory) 6 as a first storage medium for storing audio data as content data, a detachable second storage A memory stick (Sony Co., Ltd.) 7 as a medium is attached to the memory stick interface 8 as a storage medium attachment means for exchanging audio data, and audio is transmitted via an external personal computer (not shown) and a cradle 15. USB (Universal Serial Bus) interface for exchanging data Esu 9 and the audio signal processing unit 10, are connected via a bus 11. The audio signal processing unit 10 is connected to an output unit 12 such as a speaker or headphones.
[0020]
Then, the CPU 2 reads out audio data from the flash memory 6 or the memory stick 7 and supplies it to the audio signal processing unit 10 in accordance with a playlist as reproduction management information described later. The audio signal processing unit 10 generates an audio signal obtained by demodulating the supplied audio data and outputs the audio signal via the output unit 12.
[0021]
Here, the CPU 2 as the management information creation means constructs a playlist with only the tracks stored in the flash memory 6 in a state where the memory stick 7 is not attached, whereas the memory stick 7 is attached. In this state, a playlist is constructed using both the tracks stored in the flash memory 6 and the tracks stored in the memory stick 7.
[0022]
In addition to such a configuration, the CPU 2 as the management information updating unit constantly monitors the attachment / detachment of the memory stick 7 via the memory stick interface 8, and when the attachment / detachment of the memory stick 7 is detected during the reproduction operation, The playlist is rebuilt and updated according to the presence or absence of the memory stick 7.
[0023]
Next, a playback management processing procedure for rebuilding a playlist during the above-described playback operation will be described in detail with reference to the flowchart shown in FIG.
[0024]
In practice, the CPU 2 of the portable digital player 1 enters from the start step of the routine RT1 and proceeds to step SP1. In step SP1, the CPU 2 of the portable digital player 1 performs a mounting process for recognizing the storage medium and making it usable by the portable digital player 1. That is, when the flash memory 6 as the first storage medium is mounted as the drive No. 1 and the memory stick 7 as the second storage medium is mounted on the memory stick interface 8, the memory stick 7 is inserted. Mount as drive No. 2 and go to the next step SP2.
[0025]
In step SP2, the CPU 2 of the portable digital player 1 creates a playlist using the tracks stored in the mounted storage medium, and proceeds to the next step SP3.
[0026]
In step SP3, the CPU 2 as the reproducing means sequentially reads and reproduces the tracks according to the playlist from the mounted storage medium.
[0027]
In subsequent step SP4, the CPU 2 of the portable digital player 1 monitors the attachment / detachment of the memory stick 7 via the memory stick interface 8.
[0028]
When the installation of the memory stick 7 is detected in step SP4, this means that the track stored in the flash memory 6 (in this case, the track No. 3 of the drive No. 1) is reproduced during playback as shown in FIG. At this time, the CPU 2 of the portable digital player 1 moves to step SP5 and continues the track No. 3 of the drive No. 1 being reproduced as shown in FIG. 3B. During playback, the memory stick 7 is mounted as drive No. 2 and the process proceeds to the next step SP6.
[0029]
In step SP6, the CPU 2 of the portable digital player 1 uses both the track stored in the flash memory 6 and the track stored in the attached memory stick 7 as shown in FIG. The list is reconstructed, and the process proceeds to the next step SP7.
[0030]
In step SP7, when the reproduction of the track No. 3 of the drive No. 1 being reproduced is completed, the CPU 2 of the portable digital player 1 starts reproduction according to the reconstructed playlist, and then returns to step SP4 and again the memory stick. 7 is monitored. Here, when the playback mode of the portable digital player 1 is the normal playback mode, the flash memory is started by starting playback from the track next to the track that has been played back (in this case, track No. 4 of drive No. 1). 6 and the track stored in the memory stick 7 can be reproduced continuously.
[0031]
On the other hand, when the removal of the memory stick 7 is detected in step SP4, the CPU 2 of the portable digital player 1 moves to step SP8, and whether or not the currently reproduced track is a track stored in the memory stick 7. Determine whether.
[0032]
In step SP8, when the track being reproduced is not a track stored in the memory stick 7, as shown in FIG. 4 (A), this is the track stored in the flash memory 6 (in this case, the drive No. 1). In this state, the memory stick 7 is detached during the reproduction of the track No. 3). At this time, the CPU 2 of the portable digital player 1 moves to step SP9, and as shown in FIG. While continuously playing the No. 1 track No. 3, the memory stick 7 of the drive No. 2 is unmounted, and the process proceeds to the next step SP10.
[0033]
In step SP10, the CPU 2 of the portable digital player 1 reconstructs the playlist using only the tracks stored in the flash memory 6 as shown in FIG. 4C, and proceeds to step SP7.
[0034]
In step SP7, when the reproduction of track No. 3 of the drive No. 1 being reproduced is completed, the CPU 2 of the portable digital player 1 starts reproduction according to the reconstructed playlist, and then returns to step SP4, and again the memory stick 7 Monitor removal / attachment. Here, when the playback mode of the portable digital player 1 is the normal playback mode, the flash memory is restarted by restarting playback from the track next to the track that has finished playback (track No. 4 of drive No. 1 in this case). 6 can be reproduced continuously.
[0035]
On the other hand, when the track being reproduced is a track stored in the memory stick 7 in step SP8, this is the track stored in the memory stick 7 (in this case, the drive) as shown in FIG. In this state, the memory stick 7 is detached during the reproduction of the track No. 2) of No. 2. At this time, the CPU 2 of the portable digital player 1 moves to step SP11, and as shown in FIG. The playback of the currently playing track is stopped, the memory stick 7 of drive No. 2 is unmounted, and the process proceeds to the next step SP12.
[0036]
In step SP12, the CPU 2 of the portable digital player 1 reconstructs the playlist using only the tracks stored in the flash memory 6 as shown in FIG. 5C, and proceeds to step SP13.
[0037]
In step SP13, the CPU 2 of the portable digital player 1 resumes the reproduction process according to the reconstructed playlist, returns to step SP4, and again monitors the attachment / detachment of the memory stick 7.
[0038]
In the above configuration, when the CPU 2 of the portable digital player 1 detects the mounting of the memory stick 7 during the reproduction of the track stored in the flash memory 6, the memory stick 7 is reproduced while continuously reproducing the currently reproduced track. Mount and reconstruct the playlist using the tracks stored in both the flash memory 6 and the memory stick 7. Then, after the reproduction of the currently reproduced track is completed, the CPU 2 performs reproduction according to the reconstructed playlist.
[0039]
When the CPU 2 of the portable digital player 1 detects the removal of the memory stick 7 during the reproduction of the track stored in the flash memory 6, the CPU 2 unmounts the memory stick 7 while continuously reproducing the currently reproduced track, The playlist is reconstructed using only the tracks stored in the memory 6. Then, after the reproduction of the currently reproduced track is completed, the CPU 2 performs reproduction according to the reconstructed playlist.
[0040]
Thereby, in the portable digital player 1, even if the memory stick 7 is attached / detached during the reproduction of the track stored in the flash memory 6, the reproduction is continued and the appropriate playlist reflecting the attachment / detachment of the memory stick 7 is obtained. Can be updated.
[0041]
According to the above configuration, when the memory stick 7 is attached or detached during playback of the flash memory 6, the playlist is reconstructed after mounting or unmounting the memory stick 7 while continuously playing the currently playing track. Since the reproduction is performed according to the reconstructed playlist after the reproduction of the track being reproduced, the playlist can be appropriately updated and the reproduction can be continued without stopping the reproduction.
[0042]
(5) Other Embodiments In the above-described embodiment, when the memory stick 7 is attached and detached during the reproduction operation, the playlist is reconstructed while continuously reproducing the track being reproduced. If audio data or memory stick 7 is encrypted for copyright management, or if the portable digital player 1 has low processing capability, track playback and playlist reconstruction are executed simultaneously. It is thought that it is not possible to obtain.
[0043]
In this case, the track number of the track being played and the playback stop position are stored in the RAM 3 as playback stop position information, and then playback is paused. After the playlist is reconstructed, playback is resumed based on the playback stop position information. By doing so, it is possible to perform continuous reproduction in a minimum stop period without giving a sense of incongruity to the user.
[0044]
In the above-described embodiment, the portable digital player 1 that reproduces audio data from the built-in flash memory 6 as the first storage medium and the memory stick 7 as the detachable second storage medium is used for the portable digital player 1. Although the present invention is described above, the present invention is not limited to this. For example, the present invention has a plurality of storage media such as a digital player to which two or more memory sticks 7 can be attached, and at least one of them is detachable. The present invention can be applied to possible digital players.
[0045]
Furthermore, in the above-described embodiment, the present invention is applied to the portable digital player 1 that reproduces audio data from the flash memory 6 as the first storage medium and the memory stick 7 as the second storage medium. As described above, the present invention is not limited to this, and the present invention can also be applied to a digital player that reproduces video data.
[0046]
Furthermore, in the above-described embodiment, the case where the present invention is applied to the portable digital player 1 as a playback apparatus has been described. The present invention can be applied to other electronic devices.
[0047]
【The invention's effect】
As described above, according to the present invention, the content data stored in the first storage medium is reproduced according to the first playlist , and the content data stored in the second storage medium that can be detachably attached. and playback means you play in accordance with the second playlist, and detachable monitoring means for monitoring the attachment and detachment of removably mountable second storage medium, the play of managing first playlist and the second playlist When the second storage medium is loaded during reproduction of content data according to the first playlist, the playlist management means includes both the first playlist and the second playlist. manage reconstructed play list created by reconstructing the first playlist and the second playlist using, playback means, according to re-build the playlist Reproducing the content data, while reproducing the content data in accordance with the first playlist, when the second storage medium is detached, playlist management means, only the first playlist and management, playback means Since the content data stored in the first storage medium is reproduced according to the first playlist, the detachable second can be obtained during the reproduction of the content in the built-in first storage medium. Even if the storage medium is attached or detached, it is possible to reconstruct both the first playlist and the second playlist while continuing the reproduction, so that the reproduction of the content data being reproduced is completed. Later, the content data can be played back according to the rebuilt playlist, and thus copied by the rebuilt playlist without stopping the playback. Ceiling data it is possible to realize a reproducing apparatus capable of reproducing.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a circuit configuration of a portable digital player according to the present invention.
FIG. 2 is a flowchart showing a reproduction management processing procedure.
FIG. 3 is a schematic diagram for explaining a case where a memory stick is mounted during reproduction of a flash memory.
FIG. 4 is a schematic diagram for explaining a case where a memory stick is detached during reproduction of a flash memory.
FIG. 5 is a schematic diagram for explaining a case where the memory stick is detached during reproduction of the memory stick.
FIG. 6 is a schematic diagram for explaining a play list;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Portable digital player, 2 ... CPU, 3 ... RAM, 4 ... Display part, 5 ... Operation part, 6 ... Flash memory, 7 ... Memory stick, 8 ... Memory stick interface, 9 ...... USB interface, 10 ... Audio signal processing unit, 11 ... Bus, 12 ... Output unit, 15 ... Cradle.

Claims (2)

The content data stored in the first storage medium is reproduced according to the first playlist, and the content data stored in the detachable second storage medium is reproduced according to the second playlist. and playback means that,
An attachment / detachment monitoring means for monitoring the attachment / detachment of the second storage medium which is detachably attachable;
Playlist management means for managing the first playlist and the second playlist,
When the second storage medium is loaded while the content data is being reproduced according to the first playlist, the playlist management means stores both the first playlist and the second playlist. using the manage reconstructed play list created by reconstructing the first playlist and the second playlist, the upper Symbol playback unit reproduces the content data according to the above rebuild playlist ,
During playback of the content data in accordance with the first playlist, the case where the second storage medium is detached, the playlist management means, the first only manage playlists, top Symbol playback means Is a playback device that plays back the content data stored in the first storage medium in accordance with the first playlist. Playback device
A first reproduction step of reproducing the content data stored in the first storage medium according to the first playlist;
A second reproduction step of reproducing the content data stored in the second storage medium that is detachably attachable according to a second playlist;
An attachment / detachment monitoring step for monitoring the attachment / detachment of the second storage medium which is detachably attachable;
A playlist management step for managing the first playlist and the second playlist,
When the second storage medium is loaded while the content data is being reproduced according to the first playlist, the playlist management step includes both the first playlist and the second playlist. And managing the reconstructed playlist created by reconstructing the first playlist and the second playlist, wherein the first reproduction step and the second reproduction step include the reconstructed play list. Play the above content data according to the list,
When the second storage medium is detached during the reproduction of the content data according to the first playlist, the playlist management step manages only the first playlist and performs the first reproduction. The step is a playback management method for a playback device for playing back the content data stored in the first storage medium in accordance with the first playlist.

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