JP4246695B2 - Playback apparatus, control method, and program - Google Patents

Description

  The present invention relates to a playback device, a control method, and a program for playing back an audio and / or video playback file, and more particularly to a playback device, a control method, and a program that appropriately process fast forward or fast reverse.

  Patent Document 1 discloses fast-forwarding of an AAC (Advanced Audio Coding) file in an ADIF (Audio Data International Format) format. A frame in ADIS format has a variable length, and there is no information about the frame length at the beginning of the frame. When fast-forwarding a file in ADIS format, if the frame bit information of each frame is not subdivided and analyzed, I don't know the address. Since it takes time to subdivide and analyze frame bit information, the head address information of each frame is saved in a table when the ADIS format file is first played back in order to shorten the fast-forward process of the ADIS format file. Thereafter, when fast-forwarding the file, the head address information of the table is referred to.

  Japanese Patent Application Laid-Open No. 2004-228561 discloses mini-disk fast-forward and fast-rewind in a mini-disc player. For example, a forward track jump is performed with a common key together with fast forward, and in the case of fast forward, the user keeps pressing the common key for a long time. The fast-forwarding audio data is decompressed for a predetermined time, and when it is determined that fast-forwarding has been performed, the fast-forwarding sound is played using the previously decompressed data and the fast-forwarding is started quickly. I am doing so.

Patent Document 3, when reproducing the variable length encoded moving image data, discloses a reproducing method capable of quickly reproduced from the specified time code position. According to the reproduction method, the variable length encoded moving image data is regarded as fixed length bit rate data, and a jump is made to an approximate position. Thereafter, some header information in the vicinity of the jump destination is examined and designated. Jumps to an address that matches the time code.

Patent Document 4 discloses an audio playback apparatus that performs fast-forward and fast-rewind of seamless format compressed audio. According to the audio reproduction device, jumping by a predetermined number of jump sectors, reading audio data from the number of read sectors equal to or greater than the minimum amount of data that can be output from the jump destination, and outputting sound about the read data, The process of jumping to the next jump destination is repeated.
JP 2002-41095 A Japanese Patent Laid-Open No. 7-29355 JP 2000-50208 A Japanese Patent Laid-Open No. 2004-206827

  For example, the aforementioned AAC file includes a file with a seek table and a file without a seek table. In the seek table, information for realizing halfway playback start is written in the AAC file, and it is difficult to start halfway playback for an AAC file without a seek table. Note that “playback can be started midway” means that the playback target file can be played back from a position after the head position, not from the head position. In a conventional playback device, if the user presses the fast-forward or fast-rewind operation key during playback of an AAC file without a seek table and then cancels the press, a silence state or decoding error occurs and playback cannot be resumed. End up. Similarly, in the conventional playback apparatus, even if the user starts fast-forward or fast-reverse with respect to a playback target file that can start playback halfway, the playback target file enters the playback target file that cannot start playback halfway. Even if fast forward and fast reverse are canceled, it becomes difficult to resume playback of the playback target file.

  Patent Documents 1 to 4 do not disclose any technique for dealing with such a problem.

  An object of the present invention is to provide a playback apparatus, a control method, and a program that can appropriately cope with a fast-forward or fast-reverse instruction from a user when a playback target file that cannot be started during playback is included in a recording medium. It is.

The reproducing apparatus of the present invention has the following means.
Playback means for playing back the file to be played,
Fast-forward or fast-reverse execution means for performing fast-forward or fast-reverse on the file to be played currently being played back,
Instruction detecting means for detecting a fast-forward or fast-reverse instruction from the user during reproduction of the file to be reproduced by the reproducing means;
In the reproduction means, it is possible to determine whether or not the reproduction target file being reproduced is capable of starting reproduction in the middle, and whether or not reproduction can be started in the middle.
If the determination of whether or not playback can be started in the middle is positive, the effective control means for operating the fast-forward or fast-reverse execution means with the fast-forward or fast-reverse instruction from the user as valid, and the user if the determination of whether or not playback can be started in the middle is negative The invalid time control means for continuing the reproduction of the file to be reproduced by the reproduction means by invalidating the fast forward or fast reverse instruction from the reproduction means.

Another reproducing apparatus of the present invention has the following means.
Instruction detection means for detecting a fast-forward or fast-reverse instruction from the user;
Fast-forward or fast-reverse execution means for performing fast-forward or fast-reverse with respect to a file that can be reproduced in the middle based on a fast-forward or fast-rewind instruction from the user,
During the fast forward or fast reverse execution by the fast forward or fast reverse execution means, when the file to be fast forwarded or fast reverse is switched, it is determined whether or not the file after switching can be started to be played halfway. Means for determining whether playback can be started halfway,
If the playback start possibility determination is positive, the fast forward or fast reverse instruction from the user is valid, and the fast forward or fast reverse by the fast forward or fast reverse execution means is continued for the file after switching. If the control means and the determination of whether or not playback can be started in the middle are negative, the fast-forward or fast-rewind instruction from the user is regarded as invalid, and the specified file different from the fast-forward or fast-reverse processing for the playback target file after switching. Invalid time processing means for processing.

The playback apparatus control method of the present invention includes the following steps.
An instruction detection step for detecting a fast-forward or fast-reverse instruction from the user during playback of the file to be played;
An intermediate playback start enable determination step for determining whether or not the playback target file currently being played can start playback on the way;
If the mid-stream playback start determination is positive, the fast-forward or fast-reverse instruction from the user is considered valid, and a control step when valid is executed to perform fast-forward or fast-rewind on the currently-played playback target file, and mid-stream playback A control step when invalid, in which if the start possibility determination is negative, the fast-forward or fast-rewind instruction from the user is invalid and the reproduction of the reproduction target file currently being reproduced is continued.

Another playback apparatus control method of the present invention includes the following steps.
An instruction detection step for detecting a fast-forward or fast-reverse instruction from the user;
A fast-forward or fast-reverse execution step for performing fast-forward or fast-reverse on a file that can be reproduced during playback based on a fast-forward or fast-rewind instruction from the user;
During the fast forward or fast reverse execution step in the fast forward or fast reverse execution step, when the file to be fast forwarded or fast rewinded is switched, it is determined whether or not the file after switching can be started to be reproduced midway. Step for determining whether playback can be started halfway,
If the playback start possibility determination is positive, the fast forward or fast reverse instruction from the user is valid, and the fast forward or fast reverse operation in the fast forward or fast reverse execution step is continued for the file after switching. If the control step and the judgment that playback can be started in the middle are negative, the fast-forward or fast-rewind instruction from the user is regarded as invalid, and the specified file different from the fast-forward or fast-reverse processing for the playback target file after switching. Invalid processing step for processing.

  The program of the present invention causes a computer to function as each means of each of the above-described playback devices.

  According to the present invention, in response to a fast-forward or fast-rewind instruction from a user, it is possible to solve a problem in a case where a file that cannot be reproduced during playback is fast-forwarded or fast-rewinded.

FIG. 1 is a schematic configuration diagram of a main part of an optical disc playback apparatus 100. The optical disk 101 is, for example, a DVD-R, DVD-RW, CD-R, or CD-RW. Various AV (audio and / or video) files such as AAC files edited by the user using authoring software of a personal computer are written on the optical disc 101. The optical disc 101 is placed on a turntable (not shown) during chucking in the optical disc playback apparatus 100 and is pressed against the turntable by a clamper (not shown) from above. The spindle motor 103 rotationally drives the turntable. The optical pickup 105 is disposed below the optical disc 101 so as to be movable in the radial direction of the optical disc 101 by a thread motor 111, and includes an objective lens 106 and an electromagnetic coil 107. The electromagnetic coil 107 swings the objective lens 106 in the axial direction and in the track width direction of the optical disc 101 based on the servo signal from the servo circuit 128, and the laser beam 108 from the objective lens 106 is irradiated onto a predetermined portion of the optical disc 101 to generate light. The pickup 105 generates an RF signal based on the reflected light from the optical disc 101. The sled motor 111 moves the optical pickup 105 to a desired position in the radial direction of the optical disc 101 based on the servo signal.

  The RF signal output from the optical pickup 105 is amplified by the RF amplifier 116 and then input to the digital signal processing circuit 117, where the digital signal processing circuit 117 undergoes processing such as demodulation, expansion, and decoding. The digital signal processing circuit 117 sends a digital audio signal or the like extracted based on the input signal from the RF amplifier 116 to a DAC (digital-analog converter), and the DAC converts the digital audio signal from the RF amplifier 116 into an analog audio signal. Convert.

The system controller 120 receives a user instruction from the operation unit 121 operated by the user and receives predetermined information from the digital signal processing circuit 117, and the digital signal processing circuit 117 and the display unit 122 based on the user instruction and input information. In addition, a control signal and a predetermined data signal are output to the servo circuit 128. The system controller 120 may be of a remote control type. In the memory 123, data used for processing by the system controller 120 is temporarily written so that the system controller 120 can read the data. The servo circuit 128 generates various servo signals based on the RF signal from the RF amplifier 116 and the control signal from the system controller 120, and sends them to the spindle motor 103, the optical pickup 105, and the thread motor 111.

  FIG. 2 is a schematic explanatory diagram of processing of the playback devices 10 (FIG. 3) and 40 (FIG. 4). 2A and 2D are processing examples of the playback apparatus 10, and FIGS. 2A, 2B, and 2C are processing examples of the playback apparatus 40. FIG. The playback devices 10 and 40 are not limited to processing of audio files, but can also process AV, that is, files in which both audio and video playback data are written. The file is an audio-only file. A plurality of tracks as a plurality of audio files are recorded on the recording medium. The recording medium is, for example, the optical disc 101 and may be another recording medium such as a hard disk or an IC memory. The audio file is, for example, an MP3, WMA, or AAC file. Each file is given a track number. In FIG. 2, files with track numbers n−1 to n + 2 are described. Some audio files can be played back from a position other than the start position (= starting playback on the way) and others cannot. In FIG. 2, it is assumed that files with track numbers n and n + 1 cannot be started to be reproduced in the middle, and files with other track numbers can be started to be reproduced in the middle. An audio file whose playback cannot be started is an AAC file without a seek table, for example. On the other hand, an audio file that can be played back midway is, for example, an MP3, WMA, or AAC file with a seek table.

(A) explains the passage of each file by reproduction (PLAY). Audio files can be played back regardless of whether or not playback can be started halfway. The playback devices 10 and 40 play back audio files in the ascending order of track numbers, and in the direction from the beginning to the end of each audio file, as in the conventional playback device.

  (B) explains the passage of each file by fast-forwarding. Fast forward progresses in the ascending order of the track number in the audio file and from the beginning to the end of each audio file. An audio file that cannot be played back halfway has a problem of hang-up due to silence or a decoding error when the user cancels fast-forwarding in the middle of the file. The playback device 40 advances fast-forwarding audio files that can be played back halfway, in ascending order of track numbers and from the beginning to the end of each audio file. On the other hand, when reaching the beginning of an audio file that cannot be played back during fast forwarding during fast forward, the playback device 40 maintains a playback pause state at the start position for a predetermined time (eg, 3 seconds). Thereafter, the jump is made to the next position, that is, the start position of the audio file having a larger track number. If the next audio file is also a file whose playback cannot be started halfway, the stopped state is maintained at the head position for a predetermined time. If the user cancels fast-forwarding during the stop state for the predetermined time, playback starts from the beginning of the audio file that cannot be played back halfway.

  (C) explains the passage of each file by fast reverse. Fast rewind progresses in the descending order of the track number in the audio file and from the end of each audio file to the top. An audio file that cannot be played back midway has a problem of hang-up due to silence or a decoding error when the user cancels the fast reverse in the middle of the file. For the audio file that can be started to be reproduced halfway, the playback device 40 advances fast rewinding in the descending order of the track number and from the end to the top of each audio file. On the other hand, when an audio file that cannot be started halfway is reached during fast rewinding, the playback device 40 enters a playback pause state at the beginning of the audio file for a predetermined time (eg, 3 seconds). And then jump to the next audio file with the track number one smaller. If the next audio file is also a file whose playback cannot be started, the playback pause state is maintained for a predetermined time at the head position of the next audio file. If the user cancels the fast rewind during the stop state for the predetermined time, the playback starts from the beginning of the audio file that cannot be played back halfway.

(D) illustrates processing when the user issues a fast forward or fast reverse request (instruction) during playback of each audio file. A circle indicates that the playback apparatus 10 performs fast-forward or fast-reverse processing in accordance with a fast-forward or fast-reverse instruction from the user. X indicates that the playback apparatus 10 ignores (invalidates) the fast forward or fast reverse instruction from the user. While the playback apparatus 10 performs fast-forward or fast-reverse processing according to a fast-forward or fast-reverse instruction from the user during playback of an audio file that can be played half-way, audio that cannot be played half-way. During playback of a file, for a fast forward or fast reverse instruction from the user, the instruction is invalidated and the playback is continued as it is.
To do.

  FIG. 3 is a functional block diagram of the playback apparatus 10. The reproduction apparatus 10 includes a reproduction unit 11, a fast-forward or fast-reverse execution unit 12, an instruction detection unit 13, an intermediate reproduction start possibility determination unit 14, an effective time control unit 15, and an invalid time control unit 16. The reproduction means 11 reproduces a reproduction target file. The fast-forward or fast-reverse execution unit 12 performs fast-forward or fast-reverse with respect to the reproduction target file currently being reproduced. The instruction detection unit 13 detects a fast-forward or fast-reverse instruction from the user during the reproduction of the reproduction target file by the reproduction unit 11. The midway reproduction start possibility determination means 14 performs halfway reproduction start possibility determination as to whether or not the reproduction target file currently being reproduced by the reproduction means 11 can be reproduced halfway. The valid time control means 15 activates the fast-forward or fast-reverse execution means 12 with the fast-forward or fast-reverse instruction from the user being valid if the determination that the playback can be started halfway is positive. When it is determined that the reproduction start possibility is not determined, the invalid time control means 16 continues the reproduction of the file to be reproduced by the reproduction means 11 by invalidating the fast forward or fast reverse instruction from the user.

  FIG. 2D described above is an example of processing in the playback apparatus 10. In the description of FIG. 2, the case where the file to be played is an audio file has been described. However, the file to be processed in the playback device 10 is not limited to an audio file, and is a file that includes both audio and video data. Or you can include video-only files.

If fast-forward or fast-rewind is performed on a file that cannot be played back halfway, when the fast-forward or fast-rewind instruction is canceled, the file cannot be played from the middle position, and the playback device becomes silent, Although the freeze may occur due to a decoding error, the playback apparatus 10 can overcome such a problem because it disables fast-forward or fast-reverse from the user.

  In a specific aspect of the playback device 10, the playback device 10 further includes a specific process execution unit 20 and an instruction duration determination unit 21. The specific process execution unit 20 executes a specific process different from the process of the fast forward or fast reverse execution unit 12 for the reproduction target file currently being reproduced. The instruction duration determination unit 21 performs an instruction continuation determination as to whether or not the duration of the fast forward or fast reverse instruction from the user has reached a predetermined value or more. The invalid time control means 16 activates the specific process execution means 20 if the instruction continuation determination becomes positive after invalidating the fast forward or fast reverse instruction from the user.

  The specific process performed by the specific process execution means 20 is, for example, a track jump to the next file in the ascending order in the case of a fast forward instruction, and a track in a descending direction in the case of a fast reverse instruction. The number is a track jump to the next file.

  The playback apparatus 10 can further be equipped with a notification means 23. The notifying unit 23 notifies the user that the halfway playback start determination is negative. The notification includes not only a visual notification on a predetermined display but also an audible notification from a speaker.

The specific mode of notification performed by the notification means 23 is as follows.
(A) The time code currently being normally reproduced is blinked. This is effective when the display capability of the playback apparatus 10 is small.
(B) The file name or folder name on the display of the playback apparatus 10 is blinked.
(C) Display on the playback device 10 as text indicating that the file cannot be fast-forwarded and fast-reversed.
(D) The above (a) to (c) are performed in combination.

Although the invalidation process or the like is described for fast-forward or fast-reverse for a file that cannot be played during playback, the playback device 10 also performs pause processing for a file that cannot be played during playback . It goes without saying that processing may be performed in the same manner as fast forward or fast reverse for a file that cannot be played back midway.

  FIG. 4 is a functional block diagram of the playback device 40. The playback device 40 includes an instruction detection unit 41, a fast-forward or fast-reverse execution unit 42, a mid-way playback start determination unit 43, an effective time control unit 44, and an invalid time processing unit 45. The instruction detection unit 41 detects a fast forward or fast reverse instruction from the user. The fast-forward or fast-reverse execution means 42 performs fast-forward or fast-reverse with respect to a file that can be reproduced halfway based on a fast-forward or fast-rewind instruction from the user. The midway reproduction start possibility determination means 43 is capable of starting reproduction of a file after switching when a file for executing fast forward or fast reverse is switched during execution of fast forward or fast reverse by the fast forward or fast reverse execution means 42. It is determined whether or not playback can be started midway. The valid time control means 44 determines that the fast-forward or fast-reverse instruction from the user is valid if the halfway playback start possibility determination is positive, and fast-forward or fast-rewind execution means 42 fast-forwards the file after switching. Or continue fast rewinding. The invalid time processing means 45 determines that the fast-forward or fast-rewind instruction from the user is invalid if it is determined that playback can be started halfway, and what is fast-forward or fast-reverse processing for the playback target file after switching? Do different specific processing.

  2B and 2C described above are an example of processing in the playback device 40. FIG. In the description of FIG. 2, the case where the file to be played is an audio file has been described. However, the file to be processed in the playback device 40 is not limited to an audio file, and is a file that includes both audio and video data. Or you can include video-only files. Fast-forward or fast-reverse is started when fast-forward or fast-rewind is instructed by the user while a file that can be reproduced during playback is being reproduced or paused.

If fast-forward or fast-rewind is performed on a file that cannot be played back halfway, when the fast-forward or fast-rewind instruction is canceled, the file cannot be played from the middle position, and the playback device becomes silent, A hang-up may occur due to a decoding error. In the playback device 40, since the file to be played at the time of receiving the fast-forward or fast-rewind instruction can be started halfway, the fast-forward or fast-rewind after the playback-target file is effectively executed by the fast-forward or fast-reverse execution means 42. As the progress of rewinding reaches a file that cannot be played back halfway, the fast forward or fast rewind process is interrupted. Thereby, the reproducing | regenerating apparatus 40 overcomes the said problem.

  A further specific aspect of the playback device 40 will be described. Note that the specific processing in the invalid time processing means 45 is, for example, (a) the start position of the file after switching (not the end position of the file that cannot be reproduced halfway even in fast rewinding, but the start position). (B) processing to maintain the playback pause state and (b) playback from the beginning of the file. In the playback device 40 employing (a), the invalid time processing means 45 cancels the fast forward or fast reverse instruction from the user when the playback pause state is maintained at the head position of the file after switching. Then, playback of the file starts from the top position. The predetermined time is, for example, 3 seconds. As a result, the playback device 40 starts fast-forward or fast-rewind from a file that can start playback in the middle, and when the fast-forward or fast-rewind position reaches a file that cannot start playback in the middle, the file can be played back without any problem. You can start.

The playback device 40 further includes elapsed time determination means 50. The elapsed time determination means 50 determines the elapsed time whether or not the elapsed time from the time when the fast-forward or fast-reverse stop is started at the head position of the file that cannot be started to be reproduced halfway is greater than or equal to a predetermined value. When disabled processing means 45, the elapsed time determination if fast forward or rewind instruction from the user when it becomes positive is FREE continuously such further performs another specific process and specific processing on the file . For example, in the case of a fast forward instruction, the track number jumps to the next file in the ascending order, and in the case of a fast reverse instruction, another specific process is a track jump to the next file in the descending direction. This is a track jump. The invalid time processing means 45 also starts playback of the file from the beginning when the fast forward or fast reverse instruction is canceled when the elapsed time determination is negative.

  The playback device 40 may include a notification unit 52 that notifies the user that the determination of whether or not playback can be started midway is negative. The notification includes not only a visual notification on a predetermined display but also an audible notification from a speaker.

The specific mode of notification performed by the notification means 52 is as follows.
(A) The time code is fixed at 0:00. This is effective when the display capability of the playback device 40 is low.
(B) The time code is fixed at 0:00 and the 0:00 is blinked. This is also effective when the display capability of the playback device 40 is small.
(C) The file name or folder name on the display of the playback device 40 is blinked. .
(D) The display of the playback device 40 displays text indicating that the file cannot be fast-forwarded and fast-reversed.
(E) The above (a) to (d) are performed in combination.

  FIG. 5 is a flowchart of the playback apparatus control method 60. The playback device control method 60 corresponds to the playback device 10. In the instruction detection step S62, during the reproduction of the file to be reproduced (determination in S61 is positive), the process proceeds to S63 as soon as a fast forward or fast reverse instruction from the user is detected. In the halfway reproduction start possibility determination step S64, a halfway reproduction start possibility determination is made as to whether or not the reproduction target file currently being reproduced can start halfway reproduction. If the determination is positive, the process proceeds to S64. If there is, the process proceeds to S65. In the effective control step S64, if the midway playback start determination is positive, the fast-forward or fast-reverse instruction from the user is validated, and fast-forward or fast-reverse is executed for the playback target file currently being played back. . In the invalid time control step S65, if it is determined that the reproduction can be started halfway, the fast forward or fast reverse instruction from the user is regarded as invalid, and the reproduction of the reproduction target file currently being reproduced is continued.

  In the modified example of S64, after the instruction continuation determination is made as to whether or not the duration of the fast-forward or fast-rewind instruction from the user has exceeded a predetermined value, the fast-forward or fast-rewind instruction from the user is invalidated When the instruction continuation determination becomes positive, it is possible to execute a specific process different from the process of the fast forward or fast reverse execution means for the file to be reproduced that is currently being reproduced. The specific process is the same as that of the playback apparatus 10.

  FIG. 6 is a flowchart of the playback apparatus control method 75. The playback device control method 75 corresponds to the playback device 40. In S76, it is determined whether the current playback start file is being played or temporarily paused. If the determination is positive, the process proceeds to S77, and if not, the playback device control method 75 is terminated. In S77, it is determined whether or not a fast forward or fast reverse instruction from the user has been detected, and the process proceeds to S78 as soon as the determination becomes positive. In the fast-forward or fast-reverse execution step S78, fast-forward or fast-reverse is executed with respect to a file that can be reproduced halfway based on a fast-forward or fast-rewind instruction from the user. Thereafter, when the file to be fast-forwarded or fast-reversed is switched (determination in S79 is positive), in the middle playback start determination step S81, the middle playback is started to determine whether the file after switching can start halfway playback. Make a possible decision. If S80 is executed before S81 and the file after switching does not exist, that is, in fast forward, the file before switching is the file with the last track number, or in fast reverse, If the file before switching is the file with the first track number and it is difficult to advance further forward or backward, the playback device control method 75 is terminated without proceeding to S81. To do. If the determination in S81 is positive, the process returns to S78, and the fast forward or fast reverse instruction from the user is made valid, and the fast forward or fast reverse in the fast forward or fast reverse execution step is continued for the file after switching. Let If the determination in S81 is negative, the process proceeds to an invalid time processing step S82. In S82, the fast-forward or fast-reverse instruction from the user is regarded as invalid, and the fast-forward or fast-reverse processing is performed on the playback target file after switching. A specific process different from the above is performed.

The specific processing in S82 is, for example, maintaining the playback pause state at the top position of the file after switching. Further, when the fast-forward or fast-rewind instruction from the user is canceled during the execution of the specific process, the file may be played back from the top position. In addition, when the elapsed time is judged whether the elapsed time from the time when the fast forward or fast reverse is stopped at the head position of the file where playback cannot be started is over a predetermined value, the elapsed time becomes positive if fast forward or rewind instruction from the user is FREE continuously such, may be performed additional specific process and specific process for the file. The specific content of the further specific processing is the same as the specific content of the additional specific processing of the playback device 40. In addition, when the elapsed time determination is negative, when the fast forward or fast reverse instruction from the user is canceled, it is preferable to start playback of the file from the beginning.

  The program to which the present invention is applied causes a computer to function as each unit of the playback device 10 or the playback device 40. Alternatively, a program to which the present invention is applied causes a computer to execute the steps of the playback device control method 60 or the playback device control method 75.

It is a principal part schematic block diagram of an optical disk reproducing device. It is a schematic explanatory drawing of the process of a reproducing | regenerating apparatus. It is a functional block diagram of a reproducing | regenerating apparatus. It is a functional block diagram of another reproducing | regenerating apparatus. It is a flowchart of the control method for reproducing | regenerating apparatus. It is a flowchart of the control method for another reproducing | regenerating apparatus.

Explanation of symbols

10: playback device, 11: playback means, 12: fast-forward or fast-reverse execution means, 13: instruction detection means, 14: playback start enable determination means, 15: valid-time control means, 16: invalid-time control means, 20: Specific processing execution means, 21: instruction duration determination means, 23: notification means, 40: playback device, 41: instruction detection means, 42: fast forward or fast reverse execution means, 43: playback start possibility determination means, 44: valid Time control means 45: Invalid time processing means 50: Elapsed time determination means 52: Notification means 60: Control method for playback device 75: Control method for playback device

Claims (12)

Define fast forward and fast rewind regardless of whether it is with playback or without playback, and move the playback position of the file to the middle between the beginning and end of the file by fast forward or fast rewind. A file that can be played back from the playback position is defined as a file that can be played back in the middle, and a file that cannot be played back from the intermediate playback position is defined as a file that cannot be played back halfway.
In the playback device, the movement of the playback position at the time of fast forward and fast reverse is a logical movement that reads the playback data of the audio file and traces the playback data associated with each playback position.
Playback means for playing back the file to be played,
Fast-forward or fast-reverse execution means for performing fast-forward or fast-reverse on the file to be played currently being played back,
Instruction detection means for detecting a fast-forward or fast-rewind instruction from the user during reproduction of the file to be reproduced by the reproduction means;
In the above-mentioned reproduction means, it is possible to determine whether or not the reproduction target file currently being reproduced is capable of starting reproduction halfway, and whether or not reproduction can be started halfway.
If the halfway reproduction start possibility determination is positive, it is determined that the fast-forwarding or fast-rewinding instruction from the user is valid and the effective-time control means for operating the fast-forwarding or fast-reverse executing means; Invalidity control means for continuing the reproduction of the file to be reproduced by the reproduction means by invalidating the fast-forward or fast-rewind instruction from the user if any;
A playback apparatus comprising: Track jump execution means for executing a track jump to the next file whose track number is in the ascending or descending direction with respect to the file to be played currently being played back,
Instruction continuation determining means for performing instruction continuation determination as to whether or not the continuation time of the instruction from the time of issuing the fast-forward or fast-rewind instruction from the user exceeds a predetermined value, and a fast-forward or fast-rewind instruction from the user If the instruction continuation determination is positive, the invalid time control means that causes the track jump execution means to execute a track jump in the ascending or descending direction ,
The playback apparatus according to claim 1, wherein: Define fast forward and fast rewind regardless of whether it is with playback or without playback, and move the playback position of the file to the middle between the beginning and end of the file by fast forward or fast rewind. A file that can be played back from the playback position is defined as a file that can be played back in the middle, and a file that cannot be played back from the intermediate playback position is defined as a file that cannot be played back halfway.
In the playback device, the movement of the playback position at the time of fast forward and fast reverse is a logical movement that reads the playback data of the audio file and traces the playback data associated with each playback position.
Instruction detection means for detecting a fast-forward or fast-reverse instruction from the user;
Fast-forward or fast-reverse execution means for performing fast-forward or fast-reverse with respect to a file that can be reproduced in the middle based on a fast-forward or fast-rewind instruction from the user,
When fast-forward or fast-reverse is executed by the fast-forward or fast-reverse means, when the file to be fast-forwarded or fast-reversed is switched, it is determined whether or not the file after switching can be started to be reproduced halfway. Means for determining whether or not playback can be started midway,
If the playback start possibility determination is positive, the fast forward or fast reverse instruction from the user is valid, and the fast forward or fast reverse by the fast forward or fast reverse execution means is continued for the file after switching. If the time control means and the judgment that playback can be started in the middle are negative, the fast-forward or fast-rewind instruction from the user is regarded as invalid and the playback target file after switching is specified differently from the fast-forward or fast-reverse processing. Invalid time processing means for performing the processing of
A playback apparatus comprising: The invalid time processing means for maintaining a playback pause state at the head position of the file after switching as the specific processing;
The playback apparatus according to claim 3, further comprising: When the playback pause state is maintained at the head position of the file after switching, when the fast forward or fast reverse instruction from the user is canceled, the invalid time processing means starts playback of the file from the head position. ,
The playback apparatus according to claim 4, further comprising: Elapsed time determination means for determining the elapsed time from the time when the fast-forward or fast-reverse stop start is started at the head position of the file that cannot be played halfway, and whether the elapsed time determination is correct. If the fast forward or fast reverse instruction from the user is still continued at the time of the above, the invalid time processing for executing the track jump to the next file with the track number in the ascending or descending direction with respect to the file means,
The playback apparatus according to claim 4, further comprising: When the elapsed time determination is negative, when the fast-forward or fast-reverse instruction from the user is canceled, the invalid time processing means for starting playback of the file from its head,
The playback apparatus according to claim 6, further comprising: The invalid time processing means for reproducing from the head of the file as the specific processing,
The playback apparatus according to claim 3, further comprising: A notification means for notifying the user that the determination of whether or not playback can be started midway is negative,
The playback apparatus according to claim 1, comprising: Define fast forward and fast rewind regardless of whether it is with playback or without playback, and move the playback position of the file to the middle between the beginning and end of the file by fast forward or fast rewind. A file that can be played back from the playback position is defined as a file that can be played back in the middle, and a file that cannot be played back from the intermediate playback position is defined as a file that cannot be played back halfway.
In the control method for a playback device, the movement of the playback position during fast forward and fast reverse is a logical movement in which playback data of an audio file is read and the playback data associated with each playback position is traced.
An instruction detection step for detecting a fast-forward or fast-reverse instruction from the user during playback of the file to be played;
An intermediate playback start enable determination step for determining whether or not the playback target file currently being played can start playback on the way;
If the halfway playback start determination is positive, a fast-forward or fast-reverse instruction from the user is regarded as valid, and a valid-time control step for executing fast-forward or fast-reverse with respect to the currently-played playback target file; and If it is determined that playback can be started halfway, the fast-forward or fast-rewind instruction from the user is invalidated, and the invalid time control step for continuing the playback of the file to be played currently being played back,
A control method for a playback apparatus, comprising: Define fast forward and fast rewind regardless of whether it is with playback or without playback, and move the playback position of the file to the middle between the beginning and end of the file by fast forward or fast rewind. A file that can be played back from the playback position is defined as a file that can be played in the middle, and a file that cannot be played back from the intermediate playback position is defined as a file that cannot be played back in the middle.
In the control method for a playback device, the movement of the playback position during fast forward and fast reverse is a logical movement in which playback data of an audio file is read and the playback data associated with each playback position is traced.
An instruction detection step for detecting a fast-forward or fast-reverse instruction from the user;
A fast-forward or fast-reverse execution step for performing fast-forward or fast-reverse with respect to a file that can be reproduced in the middle based on a fast-forward or fast-rewind instruction from the user;
During the fast forward or fast reverse execution in the fast forward or fast reverse execution step, when the file to be fast forwarded or fast reverse is switched, it is determined whether or not the file after switching can start playback in the middle. A step for determining whether playback can be started during the process,
If the playback start possibility determination is positive, the fast forward or fast reverse instruction from the user is valid, and the fast forward or fast reverse in the fast forward or fast reverse execution step is continued for the file after switching. If the time control step and the judgment that playback can be started in the middle are negative, the fast-forward or fast-rewind instruction from the user is regarded as invalid and the playback target file after switching is specified differently from the fast-forward or fast-reverse processing. Invalid processing step for performing
A control method for a playback apparatus, comprising:   The program for functioning a computer as each means of the reproducing | regenerating apparatus in any one of Claims 1-9.

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