JPWO2007142183A1 - Content reproduction apparatus, content reproduction method, and content reproduction program - Google Patents

Abstract

Provided is a video playback device that plays back video in a video section according to a remaining battery level. The battery remaining amount measuring means 11 measures the remaining amount of the battery. The video reproducible time calculating means 12 calculates the length of time during which video can be played with reference to the measured remaining battery level. The video section relevance calculating means 13 determines whether or not the calculated time length is shorter than the time length of the video after the portion currently being reproduced. When the calculated time length is shorter, the video section importance level calculation means 13 calculates the total relevance between each video section after the current playback time position and each video section before the current playback position. Is calculated as the importance of the video section. The scheduled reproduction video section selecting unit 14 selects a video section to be reproduced based on the importance so as to be within the time length calculated by the video reproducible time calculating unit 12. The video playback means 15 plays back the video in the video section selected by the playback scheduled video section selection means 14.

Description

  This application is based on Japanese Patent Application No. 2006-156535 (filed on June 5, 2006), and claims the priority of the Paris Convention based on Japanese Patent Application No. 2006-156535. The disclosure of Japanese Patent Application No. 2006-156535 is incorporated herein by reference to Japanese Patent Application No. 2006-156535.

  The present invention relates to a content reproduction apparatus, a content reproduction method, and a content reproduction program, and in particular, a content reproduction apparatus that controls a content section to be reproduced when the remaining battery level of the content reproduction apparatus decreases, a content reproduction method, and content reproduction Regarding the program.

  Mobile terminals such as mobile phones, PDAs (Personal Digital Assistants), and notebook personal computers (notebook personal computers) related to the present invention are playing back content (for example, video) stored in the server or the mobile terminal itself. When the remaining battery level is low, it is common to warn that the remaining battery level is low and continue playing the video until just before the power supply from the battery stops.

  However, if the video playback continues normally until just before the power supply from the battery stops, the video being played cannot be played back to the end or the video playback is interrupted regardless of the convenience of the viewer. As a result, there was a problem that the viewer was uncomfortable. In particular, in the case of a sports program, a drama program, a quiz program, or the like, when the video playback ends in the middle, the discomfort given to the viewer who is worried about the result was significant.

  Patent Document 1 describes an example of a video reproduction method. The power consumption suppression method described in Patent Literature 1 detects the actual remaining battery level and predicts the battery capacity required to play back the received content. When the remaining battery level is low by comparing the remaining battery capacity with the required battery capacity, the power shortage is notified and the quality (number of frames, etc.) of moving image data is reduced from the distribution server (moving image). Send data with reduced quality).

  Further, in Patent Document 2, based on the operation mode and operation restriction process set by the user, only a part of the encoded data transmitted by the server is received to control the image quality, or the user preference data. There is described a data reproducing apparatus that controls reception, decoding, or reproduction output processing based on the importance determined based on the battery level and the remaining battery level.

  In Patent Document 3, when the remaining battery level is low, the image quality is reduced (decreasing the image quality) according to the importance of each section of the video set by the user in advance until the remaining battery level is exhausted. A method is described in which important video sections can be played back and viewed without interruption.

  Patent Document 4 describes a method of specifying an important section in content and determining a portion to be reproduced based on the acoustic feature amount of the content.

  Patent Document 5 describes an apparatus that calculates a content reproducible time based on a remaining battery level and presents a list of content with a replay time shorter than the calculated reproducible time to the user.

JP 2002-77377 A (paragraphs 0010 to 0031, FIG. 1) JP2003-264767 (paragraphs 0035-0212, FIG. 1) Japanese Patent Laying-Open No. 2005-267218 (paragraphs 0021 to 0093, FIG. 1) JP 2005-328329 A (paragraphs 0012 to 0019, FIG. 1) Japanese Patent Laying-Open No. 2005-333583 (paragraphs 0022 to 0038, FIG. 1)

  However, the methods described in Patent Document 1 to Patent Document 4 described above have the following problems.

  The methods described in Patent Document 1 to Patent Document 3 suppress power consumption by controlling the video quality to be played according to the importance of the video section, which is a video of a predefined section. Yes. However, the video content itself is distributed as it is. For this reason, there is a problem that the power supply from the battery may stop before the scene (video section) that the user wants to watch most is reproduced.

  Further, in the methods described in Patent Document 1 to Patent Document 4, the importance for a video section to be reproduced is always constant regardless of whether or not a certain video section has been viewed. For this reason, for example, the importance of the video section of the answer part of the quiz differs depending on whether the video section of the problem part of the quiz program is viewed or not. However, in the methods described in Patent Document 1 to Patent Document 4, the importance is the same regardless of whether or not viewing is performed, and the importance depends on the viewed video section even when there is a viewed video section. There is a problem that cannot be changed.

  Further, the device described in Patent Document 5 determines the content to be presented to the user based on the playback time of the content regardless of the importance of the content. There is a problem that it is not possible to present content with a long time to the user.

  Therefore, a typical object of the present invention is to provide a content reproduction apparatus, a content reproduction method, and a content reproduction program for selecting a content section to be reproduced in accordance with a reproduced part and a remaining battery level.

  According to the first aspect of the present invention, the content reproducible time calculating means for calculating the content reproducible time based on the remaining battery level, and the content section that is the content section partitioned in the time direction, Depending on the content section that has been played, the content importance level calculating means for calculating the importance level of the content section to be played back, and the content playable time according to the importance level calculated by the playback target content importance level calculating means A content playback apparatus comprising: a content section selection unit that selects a content section to be played back within the time calculated by the calculation unit; and a content playback unit that plays back the content in the content section selected by the content section selection unit. Is provided.

  According to the second aspect of the present invention, a content reproducible time calculating step for calculating a content reproducible time based on a remaining battery level, and a content interval that is a content interval divided in a time direction, In accordance with the reproduced content section, a reproduction target content importance calculation step for calculating the importance of the content section to be reproduced, and the content reproduction according to the importance calculated in the reproduction target content importance calculation step A content section selecting step for selecting a content section to be played back within the time calculated in the possible time calculating step, and a content playback step for playing back the content in the content section selected in the content section selecting step. A content playback method is provided.

  According to the third aspect of the present invention, a content reproducible time calculating step for calculating a content reproducible time based on a remaining battery level, and a content section that is a section of content divided in the time direction, In accordance with the reproduced content section, a reproduction target content importance calculation step for calculating the importance of the content section to be reproduced, and the content reproduction according to the importance calculated in the reproduction target content importance calculation step A content section selecting step for selecting a content section to be played back within the time calculated in the possible time calculating step, and a content playback step for playing back the content in the content section selected in the content section selecting step. A computer that allows the computer to perform the content playback method. Ntsu reproduction program is provided.

  According to the present invention, it is possible to easily avoid a situation in which an important scene (content section) is not reproduced because power supply from the battery is stopped. The reason is that the importance level of each content section is calculated, and the content section to be played back is determined according to the calculated importance level based on the current playback position and the remaining battery level of the content playback apparatus.

  When the remaining battery level measured by the remaining battery level measurement means falls below a certain value, the content playback time is calculated based on the remaining battery level. Content can be played.

  It is configured to calculate the importance of each content section based on the degree of relevance between each content section after the currently playing location and each content section before the content segment including the currently playing location. In this case, it is possible to reproduce the content of the unreproduced content section related to the already reproduced content section.

  When the length of the playable time of the content is shorter than the time length of the content after the currently playing portion, if the importance is calculated, the playable time of the content and the currently playing content The content can be reproduced according to the time length of the content after the point.

It is a block diagram which shows the structural example of the video reproduction apparatus of typical 1st Embodiment. It is a flowchart explaining the operation | movement of typical 1st Embodiment. It is a flowchart explaining the operation | movement of typical 2nd Embodiment. It is a block diagram which shows the structural example of the acoustic signal reproducing | regenerating apparatus of typical 3rd Embodiment. It is a flowchart explaining the operation | movement of typical 3rd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 10 Data processing part 2, 20 Storage part 3, 30 Input device 4 Display apparatus 11, 110 Battery residual quantity measurement part 12 Image | video reproducible time calculation part 13 Image | video area importance calculation part 14 Planned reproduction | regeneration video area selection part 15 Image | video Playback section 21 Video storage section 22 Video section relevance storage section 23, 230 Viewing history storage section 40 Audio output device 120 Acoustic signal reproducible time calculation section 130 Acoustic signal section importance calculation section 140 Scheduled playback acoustic signal section selection section 150 Sound Signal reproduction unit 210 Acoustic signal storage unit 220 Acoustic signal section related degree storage unit

Representative Embodiment 1
A representative first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram illustrating a configuration example of a video playback device (content playback device) according to a first exemplary embodiment of the present invention. In the present embodiment, a case where the content is a video will be described as an example.

  The video playback apparatus shown in FIG. 1 includes an input device 3, a data processing unit 1 that operates under program control, a storage unit 2 that stores information, and a display device 4. In addition, the video reproduction device is equipped with a battery that supplies power to each unit. Note that in this embodiment, the video playback device is a portable electronic device (hereinafter referred to as a mobile terminal).

  The display device 4 is a video output device such as a display and displays video. The input device 3 is an input device such as a button, a keyboard, a keypad, a pointing device, or a remote controller (remote controller), and can input an instruction relating to video reproduction such as designating a video to be reproduced.

  The storage unit 2 includes a video storage unit 21, a video segment association degree storage unit (content segment association degree storage unit) 22, and a viewing history storage unit 23. Note that the storage unit 2 may be in the mobile terminal, or may be in a location where the data processing unit 1 can acquire information stored in the storage unit 2 via a communication network.

  The video storage unit 21 stores a video (content) to be played back. The video segment relevance storage unit 22 stores the relevance between video segments. Here, the video section (content section) is obtained by dividing the video to be reproduced in the time direction. A scene defined by an editor, a camera switching shot, and the like are manually defined as video segmentation in advance. Instead of manually defining the video section, for example, a cut detection technique typified by the method described in Reference Document 1 below or a topic typified by the method described in Reference Document 2 below. A segmentation technique may be used to automatically segment the video into meaningful chunks.

[Reference 1]
Yukinobu Taniguchi, Yoshinobu Tonomura, Hiroshi Hamada, “Video Shot Switching Detection Method and Its Video Access Interface”, IEICE Transactions, Institute of Electronics, Information and Communication Engineers, April 1996, D-II, Vol. J79-D-II, No. 4, p. 538-546
[Reference 2]
Keiichiro Hoashi, Masaru Kanno, Masaki Naito, Kazunori Matsumoto, Fumiaki Shibuya, “Video Image Segmentation Method Based on Content Independent Features”, IEICE Technical Report, IEICE, June 2004, PRMU 2005-29 , P43-48

  The video segment relevance storage unit 22 stores, for each segmented video segment, the relevance of the video segment after the video segment. For example, when there are N video segments, the video segment relevance storage unit 22 determines the relevance between the first video segment and the second video segment and the first video segment with respect to the first video segment. And the degree of association between the first video section and the fourth video section, ..., and the degree of association between the first video section and the Nth video section ing.

  In addition, the video segment relevance storage unit 22 relates to the second video segment, the relevance between the second video segment and the third video segment, and the relationship between the second video segment and the fourth video segment. ... And the degree of association between the second video section and the Nth video section. Similarly, for the j-th video section, the video section relevance degree storage unit 22 similarly relates to the j-th video section and the degree of association between each video section from the j + 1-th video section to the N-th video section. Is remembered.

  The value of the degree of association R (j, k) between the j-th video section and the k-th video section may be assigned manually or automatically. As an example of a method for automatically assigning the degree of association, there is a method for calculating the degree of association by obtaining the correlation of text data assigned to each video section. The cosine similarity used in the keyword or text similarity calculation method can be used as the relevance. Reference 3 describes cosine similarity used as a method for calculating similarity between words and texts.

[Reference 3]
Yasunari Miyabe, Daiya Takamura, Manabu Okumura, “Identification of Sentence Relationships in Different Documents”, Information Processing Society of Japan, Information Processing Society of Japan, Natural Language Processing Society, July 2005, 2005-NL-169 , P. 35-42

  The viewing history storage unit 23 stores up to what time position the video has been viewed.

  The data processing unit 1 includes a remaining battery level measuring unit 11, a video reproducible time calculating unit (content reproducible time calculating unit) 12, a video section importance calculating unit (reproduction target content importance calculating unit) 13, a reproduction A scheduled video section selection unit (content section selection unit) 14 and a video playback unit 15 are included.

  The remaining battery level measurement unit 11 measures the remaining battery level of the mobile terminal. The video reproducible time calculating unit 12 refers to the remaining battery level measured by the remaining battery level measuring unit 11 and stops supplying power from the battery when the remaining battery level falls below a certain value. The time length of the video that can be played back is calculated.

  The video section importance calculation unit 13 determines whether or not the time length calculated by the video reproducible time calculation unit 12 is shorter than the time length of the video after the portion currently being played back. When determining that the time length calculated by the video reproducible time calculation unit 12 is shorter, the video section importance calculation unit 13 calls the time position of the video currently being played from the viewing history storage unit 23. Then, the degree of association between each video section after the video section including the time position of the currently played video and each video section (viewed video section) before the video section including the currently played position is shown as the video section. A value obtained by calling from the relevance level storage unit 22 and summing up the called relevance levels for each video section is calculated as the importance of the video section. The importance Vj for the j-th video section is calculated by Equation 1. In Equation 1, R (j, k) indicates the degree of association between the jth video section and the kth video section.

  The scheduled video segment selection unit 14 refers to the importance of each video segment calculated by the video segment importance calculation unit 13 so as to be within the time length calculated by the video reproducible time calculation unit 12. Select a section. For example, video sections to be played back are selected in descending order of importance so that the total time length of the video sections is within the time length calculated by the video playable time calculation unit 12. Note that the scheduled playback video section selection unit 14 allows the user to select whether the mobile terminal may automatically select the playback video section and automatically selects the playback section only when the user selects it. You may make it perform selection.

  The video playback unit (content playback unit) 15 stores the video of the video section selected by the playback scheduled video section selection unit 14 or the video (video of the video section) specified by the instruction input to the input device 3. The acquired video is displayed on the display device 4, and the video is reproduced.

  In addition, the video playback apparatus has played back the content playback time calculation process for calculating the video (content) playable time based on the remaining battery power, and the video section divided in the time direction. Content importance level calculation processing for calculating the importance level of the video segment to be played back according to the video section, and content reproducible time calculation processing according to the importance level calculated in the playback target content importance level calculation process Equipped with a content playback program for executing a content section selection process for selecting a video section to be played back within the time calculated in step 1 and a content playback process for playing back the video of the video section selected in the content section selection process. Yes.

  Next, the operation of the representative first embodiment will be described with reference to the drawings. FIG. 2 is a flowchart for explaining the operation of the representative first embodiment.

  When an identifier of video content to be played back is specified by the user via the input device 3 such as a remote controller or a keyboard, the video playback unit 15 is specified from among the videos stored in the video storage unit 21. The reproduced video is reproduced (step S101).

  The battery remaining amount measuring unit 11 measures the remaining amount of the battery of the mobile terminal at predetermined time intervals, for example (step S102). The video reproducible time calculating unit 12 refers to the remaining battery level measured by the remaining battery level measuring unit 11 and determines whether or not the remaining battery level is equal to or less than a certain value (threshold) (step). S103). When it is determined that the remaining battery level has become a certain value or less (YES in step S103), the video reproducible time calculation unit 12 can reproduce the video before the power supply from the battery stops. Is calculated (step S104).

  Next, the video section importance calculation unit 13 determines whether or not the time length calculated by the video reproducible time calculation unit 12 is shorter than the time length of the video after the part currently being played back (step S105). . When all the unviewed parts can be reproduced within the remaining battery level, that is, when the reproducible time length is equal to or greater than the unviewed part time length, the video section importance level calculation unit 13 performs the video replayable time calculation unit 12. It is determined that the time length calculated by is longer than the time length of the video after the portion currently being played back (YES in step S105). Then, the video reproduction unit 15 reproduces the video currently being reproduced as it is (step S106), and ends the processing when the reproduction is finished.

  When the time length calculated by the video reproducible time calculation unit 12 is shorter than the time length of the video after the currently played part, the video segment importance calculation unit 13 calculates the video reproducible time calculation unit 12. It is determined that the time length is shorter than the time length of the video after the current playback location (NO in step S105), and the time location of the current playback location is called from the viewing history storage unit 23 (step S107). Then, the degree of association between each video segment after the current playback time position and each video segment prior to the video segment including the part currently being played back is called from the video segment relevance storage unit 22, and is currently being played back. The importance of each video section after the location is calculated.

  The importance Vj for the j-th video section is calculated by Equation 1. Therefore, in the video of the quiz program, when the problem part (video section) of a certain quiz has been viewed, the importance of the video section of the answer part of the problem considered to be extremely high is set high. It will be.

  A method for calculating the importance of each video section will be described. For example, m is the serial number of the video section including the time position of the video currently being played back, and N is the number of video sections included in the video to be played back (step S108). Then, the video section importance calculation unit 13 calculates importance Vn (m ≦ n ≦ N) for each of the mth video section to the Nth video section (steps S109 to S111).

  Specifically, the video segment importance calculation unit 13 calculates the importance Vn of the nth video segment (step S109). Then, the video section importance calculation unit 13 adds 1 to n in order to calculate the importance of the video section after the nth video section (step S110). When n is not larger than N (NO in step S111), the video section importance calculation unit 13 calculates the importance Vn of the nth video section (1 is added in step S110). (Step S109).

  The scheduled video segment selection unit 14 refers to the importance of each video segment calculated by the video segment importance calculation unit 13 so as to be within the time length calculated by the video reproducible time calculation unit 12. Select a section. For example, as shown in step S112 and step S113, the importance is high (the importance value is large so that the total time length of the video section is within the time length calculated by the video reproducible time calculation unit 12). The video sections are arranged in order (step S112), and the video sections are selected in the arranged order (step S113).

  The video playback unit 15 acquires from the storage unit 2 the video of the video section selected by the playback scheduled video section selection unit 14 or the video specified by the instruction input to the input device 3 (video of the video section). The displayed video is displayed on the display device 4, and the video is reproduced (step S114). The video playback unit 15 may play back the videos in the video section selected by the scheduled playback video section selection unit 14 in order of importance or in order of time.

  According to the present embodiment, the importance level of the video section is calculated according to the current playback position, and the video section to be played back is selected according to the calculated importance level and the remaining battery level of the mobile terminal. Therefore, it is possible to avoid a situation in which an important scene (video section) is not reproduced because power supply from the battery is stopped.

  Note that this embodiment can be applied not only to playback of video, but also to playback of all media played back along the time axis, such as voice and music. Accordingly, both the moving image and the audio signal may be reproduced, only the moving image may be reproduced, or only the acoustic signal may be reproduced.

Representative Embodiment 2
A representative second embodiment of the present invention will be described. In the present embodiment, as in the first exemplary embodiment, a case where content is a video will be described as an example. The configuration of the video playback apparatus according to the second embodiment of the present invention is similar to the configuration of the video playback apparatus according to the first embodiment shown in FIG. Are denoted by the same reference numerals as those in FIG.

  Note that in the representative first embodiment, the video section importance calculation unit 13 calculates the importance of each video section after the time position currently being played back. However, the representative second embodiment The video section importance calculation unit 13 calculates the importance of all video sections.

  The operation of the representative second embodiment will be described with reference to the drawings. FIG. 3 is a flowchart for explaining the operation of the representative second embodiment.

  When the user specifies an identifier of video content to be played back via the input device 3 such as a remote controller or a keyboard, the video playback unit 15 is specified from among the videos stored in the video storage unit 21. The reproduced video is reproduced (step S201).

  The battery remaining amount measuring unit 11 measures the remaining battery level of the mobile terminal at predetermined time intervals, for example (step S202). The video reproducible time calculating unit 12 refers to the remaining battery level measured by the remaining battery level measuring unit 11 and determines whether or not the remaining battery level is equal to or less than a certain value (threshold) (step). S203). When it is determined that the remaining battery capacity has become a certain value or less (YES in step S203), the video reproducible time calculation unit 12 can reproduce the video before the power supply from the battery stops. Is calculated (step S204).

  The video section importance level calculation unit 13 calls the time position of the part currently being reproduced from the viewing history storage unit 23 (step S205). Then, the degree of association between each video segment after the current playback time position and each video segment prior to the video segment including the part currently being played back is called from the video segment relevance storage unit 22, and is currently being played back. The importance of each video section after the time position is calculated.

  Specifically, for example, a serial number of a video section including the time position of the currently reproduced video is m, the number of video sections included in the video to be reproduced is N, and a video including the time position of the currently reproduced video. Among the video sections before the section, the serial number p of the video section for which importance is calculated first is set as the serial number m-1 of the video section immediately before the video section including the time position of the currently reproduced video ( Step S206). Then, the video section importance calculation unit 13 calculates the importance Vn (m ≦ n ≦ N) of each of the mth video section to the Nth video section in steps S109 to S109 in the representative first embodiment. Calculation is performed in the same manner as in S111 (steps S207 to S209).

  That is, the video section importance calculation unit 13 calculates the importance Vn of the nth video section (step S207), and in order to calculate the importance of the video section after the nth video section, 1 is added to n. Is added (step S208). If n is not greater than N (NO in step S209), the video section importance calculation unit 13 calculates the importance Vn of the nth video section (1 is added in step S208). (Step S207).

  Furthermore, the video section importance calculation unit 13 adds a value obtained by multiplying the called relevance by a value less than 1 to calculate the importance of each video section before the video section including the currently reproduced part.

  The reason why weighting addition is performed by multiplying a value of less than 1 when calculating the importance of each video section prior to the video section including the currently reproduced portion will be described. If the importance of the video segment before the current video segment including the currently playing part and the importance of each video part after the currently playing part are handled equally, The video section is treated equally, and the probability that the viewed video section and the unviewed video section are reproduced becomes equal. Therefore, in order to reproduce the video section of the unviewed part more preferentially, the importance is lowered by multiplying the video section before the video section including the currently reproduced part by a weighting factor (less than 1). (Reduce the importance value).

  Specifically, the video segment importance calculation unit 13 calculates the importance Vp (0 <p ≦ m−1) of each of the m−1th video segment from the first video segment (steps S210 to S212). ). For example, when the number of video segments (N) is 6 and the fourth video segment is being played back (that is, m = 4), the importance V3 of the third video segment is the third video segment and 4 Relevance R (3, 4) with the third video section, Relevance R (3, 5) between the third video section and the fifth video section, and the third video section and the sixth video section Are the sums obtained by multiplying the relevance level R (3, 6) by a weighting factor less than 1, respectively.

  When the importance Vp of the p-th video section is calculated (step S210), the video section importance calculation unit 13 calculates 1 from p in order to calculate the importance of the video section before the p-th video section. Subtract (Step S211). If p is not less than 1 (NO in step S212), the video section importance calculation unit 13 calculates the importance Vp of the p-th video section (1 is subtracted in step S211) ( Step S210).

  Accordingly, when the fourth video section is being played back, the video section importance calculation unit 13 first calculates the importance V3 of the third video section in step S210, and then calculates the second video section. The importance V2 is calculated, and then the importance V1 of the first video section is calculated.

  The scheduled video segment selection unit 14 refers to the importance of each video segment calculated by the video segment importance calculation unit 13 so as to be within the time length calculated by the video reproducible time calculation unit 12. Select a section. For example, as shown in steps S213 and S214, the importance is high (the importance value is large so that the total time length of the video sections is within the time length calculated by the video reproducible time calculation unit 12). ) Video sections are arranged in order (step S213), and video sections are selected in the arranged order (step S214).

  The video playback unit 15 acquires from the storage unit 2 the video of the video section selected by the playback scheduled video section selection unit 14 or the video specified by the instruction input to the input device 3 (video of the video section). The displayed video is displayed on the display device 4, and the video is reproduced (step S215). The video playback unit 15 may play back the videos in the video section selected by the scheduled playback video section selection unit 14 in order of importance or in order of time. In addition, the video playback unit 15 may play back the video of each video section before the video section including the part that is currently being played.

  According to the present embodiment, the importance level of the video section is calculated according to the current playback position, and the video section to be played back is selected according to the calculated importance level and the remaining battery level of the mobile terminal. Therefore, it is possible to avoid a situation in which an important scene (video section) is not reproduced because power supply from the battery is stopped.

  Further, according to the present embodiment, even if a scene (video section) has been played back once, if the video section is important for playing back an unviewed part, the video section is played back again to the user. This makes it possible to understand the video of the unviewed part more smoothly.

Representative Embodiment 3
A representative third embodiment of the present invention will be described with reference to the drawings. FIG. 4 is a block diagram illustrating a configuration example of an acoustic signal reproduction device according to a third exemplary embodiment of the present invention. In the present embodiment, a case will be described as an example where the content is sound based on an acoustic signal.

  The acoustic signal reproduction device shown in FIG. 4 includes an input device 30, a data processing unit 10 that operates under program control, a storage unit 20 that stores information, and an audio output device 40. In addition, the acoustic signal reproducing device is equipped with a battery that supplies power to each unit. In the present embodiment, the acoustic signal reproduction device is a portable electronic device (hereinafter referred to as a mobile terminal).

  The audio output device 40 is a speaker or the like and outputs audio. The input device 30 is an input device such as a button, a keyboard, a keypad, a pointing device, or a remote controller (remote controller), and issues an instruction related to sound signal reproduction, such as designating sound signals such as music, speech, and radio programs to be reproduced. Can be entered.

  The storage unit 20 includes an acoustic signal storage unit 210, an acoustic signal section association degree storage unit 220, and a viewing history storage unit 230. The storage unit 20 may be in the mobile terminal, or may be in a place where the data processing unit 10 can acquire information stored in the storage unit 20 via a communication network.

  The acoustic signal storage unit 210 stores an acoustic signal to be reproduced. The acoustic signal section association degree storage unit 220 stores the degree of association between the acoustic signal sections. Here, the acoustic signal section is obtained by dividing the acoustic signal to be reproduced in the time direction. A scene defined by an editor, a topic switching point, and the like are manually defined in advance as sound signal breaks. Note that instead of manually defining the acoustic signal section, the acoustic signal is automatically generated using a silent section detection technique or a topic recognition technique that detects the change of topic after voice is converted into text using speech recognition technology. May be separated into meaningful groups.

  The acoustic signal section relevance degree storage unit 220 stores, for each divided acoustic signal section, a relation degree for the acoustic signal section after the acoustic signal section. For example, when there are N acoustic signal sections, the acoustic signal section relevance storage unit 220 has a degree of association between the first acoustic signal section and the second acoustic signal section with respect to the first acoustic signal section, The degree of association between the first acoustic signal section and the third acoustic signal section, the degree of association between the first acoustic signal section and the fourth acoustic signal section,..., And the first acoustic signal section and the Nth acoustic signal section The degree of association with the acoustic signal section is stored.

  In addition, the acoustic signal interval relevance storage unit 220 has a relevance between the second acoustic signal interval and the third acoustic signal interval, the second acoustic signal interval, and the fourth acoustic signal interval with respect to the second acoustic signal interval. The degree of association with the acoustic signal section,..., And the degree of association between the second acoustic signal section and the Nth acoustic signal section are stored. Similarly, the acoustic signal interval relevance storage unit 220 similarly applies the jth acoustic signal interval to the jth acoustic signal interval, and the respective sounds from the j + 1th acoustic signal interval to the Nth acoustic signal interval. The degree of association with the signal section is stored.

  The value of the degree of association R (j, k) between the jth acoustic signal section and the kth acoustic signal section may be manually assigned or automatically assigned. As an example of a method for automatically assigning the degree of association, there is a method for calculating the degree of association by obtaining the correlation of text data assigned to each acoustic signal section. The cosine similarity used in the keyword or text similarity calculation method can be used as the relevance. Reference Document 3 described above describes cosine similarity used as a method for calculating similarity between words and texts.

  The viewing history storage unit 23 stores up to which time position the sound based on the acoustic signal has been viewed. In addition, reproducing | regenerating the sound based on an acoustic signal may be described as reproducing | regenerating an acoustic signal.

  The data processing unit 10 includes a remaining battery level measurement unit 110, an acoustic signal reproducible time calculation unit 120, an acoustic signal section importance calculation unit 130, a scheduled playback acoustic signal section selection unit 140, and an acoustic signal playback unit 150. including.

  The remaining battery level measurement unit 110 measures the remaining battery level of the mobile terminal. The sound signal reproducible time calculating unit 120 refers to the remaining battery level measured by the remaining battery level measuring unit 110, and stops the power supply from the battery when the remaining battery level falls below a certain value. The time length of the acoustic signal that can be reproduced until then is calculated.

  The sound signal interval importance calculation unit 130 determines whether the time length calculated by the sound signal reproducible time calculation unit 120 is shorter than the time length of the sound signal after the portion currently being played back. When it is determined that the time length calculated by the sound signal reproducible time calculation unit 120 is shorter, the sound signal section importance calculation unit 130 calls the time position of the currently reproduced sound signal from the viewing history storage unit 230. And each acoustic signal section after the acoustic signal section including the time position of the currently reproduced acoustic signal, and each acoustic signal section (acoustic signal section that has been viewed) before the acoustic signal section including the currently reproduced portion. Is calculated from the sound signal interval relevance storage unit 220, and the sum of the called relevance values for each video interval is calculated as the importance of the sound signal interval. The importance Vj for the jth acoustic signal section is calculated by the above-described equation 1.

  The scheduled reproduction sound signal section selection unit 140 refers to the importance of each sound signal section calculated by the sound signal section importance calculation unit 130 so as to be within the time length calculated by the sound signal reproducible time calculation unit 120. The sound signal section to be reproduced is selected. For example, the acoustic signal sections to be reproduced are selected in descending order of importance so that the total time length of the acoustic signal sections is within the time length calculated by the acoustic signal reproducible time calculation unit 120. Note that the scheduled playback sound signal section selection unit 140 allows the user to select whether the mobile terminal may automatically select a playback sound signal section, and only when the user selects that the playback section is selected. Automatic selection may be performed.

  The acoustic signal reproduction unit 150 acquires and acquires the acoustic signal section selected by the scheduled reproduction acoustic signal section selection unit 140 or the acoustic signal specified by the instruction input to the input device 3 (acoustic signal in the acoustic signal section). The sound signal thus generated is converted into sound by the sound output device 40 and output, and the sound signal is reproduced.

  Next, the operation of the representative third embodiment will be described with reference to the drawings. FIG. 5 is a flowchart for explaining the operation of the representative third embodiment.

  When the user specifies the identifier of the audio signal content to be played back through the input device 3 such as a remote controller or a keyboard, the audio signal playback unit 150 displays the audio signal stored in the audio signal storage unit 210. Among them, the designated acoustic signal is reproduced (step S301).

  The battery remaining amount measuring unit 110 measures the remaining battery amount of the mobile terminal at predetermined time intervals, for example (step S302). The sound signal reproducible time calculating unit 120 refers to the remaining battery level measured by the remaining battery level measuring unit 110 and determines whether or not the remaining battery level is equal to or less than a certain value (threshold value) ( Step S303). When it is determined that the remaining battery level is equal to or less than a certain value (YES in step S303), the sound signal reproducible time calculation unit 120 can reproduce the acoustic signal until the power supply from the battery is stopped. The time length is calculated (step S304).

  Next, the sound signal interval importance calculation unit 130 determines whether or not the time length calculated by the sound signal reproducible time calculation unit 120 is shorter than the time length of the sound signal after the part currently being played back ( Step S305). When all unviewed parts can be reproduced within the remaining battery level, that is, when the reproducible time length is equal to or greater than the unviewed part time length, the acoustic signal interval importance calculation unit 130 calculates the acoustic signal reproducible time. It is determined that the time length calculated by the unit 120 is longer than the time length of the sound signal after the portion currently being reproduced (YES in step S305). Then, the acoustic signal reproducing unit 150 reproduces the currently reproduced acoustic signal as it is (step S306), and ends the processing when the reproduction is finished.

  When the time length calculated by the sound signal reproducible time calculation unit 120 is shorter than the time length of the sound signal after the currently reproduced portion, the sound signal interval importance calculation unit 130 is configured to generate a sound signal reproducible time calculation unit. It is determined that the time length calculated by 120 is shorter than the time length of the sound signal after the location currently being played back (NO in step S305), and the time position of the location currently being played back is called from the viewing history storage unit 230 (step 305). S307). Then, the degree of association between each acoustic signal section after the currently reproduced location and each acoustic signal section before the acoustic signal segment including the currently reproduced location is called from the acoustic signal interval relevance storage unit 220, respectively. The importance of each acoustic signal section after the part being reproduced is calculated.

  The importance Vj for the j-th acoustic signal section is calculated by Equation 1. Therefore, in a quiz program, when a problem part (acoustic signal section) of a certain quiz has already been viewed, the importance of the acoustic signal section of the answer part of the problem considered to be extremely high is set high. It will be.

  A method for calculating the importance of each acoustic signal section will be described. For example, m is the serial number of the acoustic signal section including the time position of the currently reproduced acoustic signal, and N is the number of acoustic signal sections included in the acoustic signal to be reproduced (step S308). Then, the sound signal interval importance calculation unit 130 calculates the importance Vn (m ≦ n ≦ N) for each of the mth sound signal interval to the Nth sound signal interval (steps S309 to S311). .

  Specifically, the acoustic signal interval importance calculation unit 130 calculates the importance Vn of the nth acoustic signal interval (step S309). Then, the sound signal interval importance calculation unit 130 adds 1 to n in order to calculate the importance of the sound signal interval after the nth sound signal interval (step S310). When n is not larger than N (NO in step S311), the acoustic signal interval importance calculation unit 130 determines the importance Vn of the nth acoustic signal interval (1 is added in step S310). Is calculated (step S309).

  The scheduled reproduction sound signal section selection unit 140 refers to the importance of each sound signal section calculated by the sound signal section importance calculation unit 130 so as to be within the time length calculated by the sound signal reproducible time calculation unit 120. The sound signal section to be reproduced is selected. For example, as shown in step S312 and step S313, the importance level is high (the importance level value) so that the total time length of the acoustic signal section is within the time length calculated by the acoustic signal reproducible time calculation unit 120. Are arranged in order (step S312), and the acoustic signal sections are selected in the arranged order (step S313).

  The acoustic signal reproducing unit 150 acquires the acoustic signal in the acoustic signal section selected by the scheduled acoustic signal section selecting unit 140 or the acoustic signal specified by the instruction input to the input device 3 (acoustic signal in the acoustic signal section). Then, the acquired sound signal is converted into sound by the sound output device 40 and output, and the sound signal is reproduced (step S314). The acoustic signal reproducing unit 150 may reproduce the acoustic signals in the acoustic signal section selected by the scheduled acoustic signal section selecting unit 140 in order of importance or in order of time.

  According to the present embodiment, the importance level of the acoustic signal section is calculated according to the current playback position, and the acoustic signal section to be played back is selected according to the calculated importance level and the remaining battery level of the mobile terminal. Since it is configured, it is possible to avoid a situation in which an important scene (sound signal section) is not reproduced because power supply from the battery is stopped.

  In the content reproduction apparatus according to the first aspect of the present invention, the content reproduction apparatus includes a battery remaining amount measuring unit that measures the remaining battery level, and the content reproducible time calculating unit is configured such that the remaining battery level measured by the remaining battery level measuring unit is a constant value. In the following cases, the content reproducible time may be calculated based on the remaining battery level.

  In the content reproduction apparatus according to the first aspect of the present invention, the content reproduction device includes a content segment relevance storage unit that stores the relevance between content segments, and the reproduction target content importance calculation means On the other hand, the degree of relevance with each content section before the content section including the currently playing portion is called from the content section relevance storage unit, and the sum of the called relevance is calculated as the importance of each content section You may make it do.

  The content playback apparatus according to the first aspect of the present invention includes a content section relevance storage unit that stores the relevance of content sections, and the playback target content importance calculation means is a time calculated by the content playable time calculation means. When the length is shorter than the time length of the content after the currently playing location, for each content segment after the currently playing location, each content segment before the content segment including the currently playing location May be called from the content interval relevance storage unit, and the sum of the called relevance may be calculated as the importance of each content interval.

  Although representative embodiments of the present invention have been described in detail, various changes, substitutions and alternatives may be made without departing from the spirit and scope of the invention as defined in the claims. It should be understood. Moreover, even if the claim is amended in the application procedure, the inventor intends that the equivalent scope of the claimed invention is maintained.

  The present invention can be applied to any device that operates on a battery and can reproduce content. For example, the present invention can be applied to content playback on a hard disk recorder, home server, personal computer, mobile phone, DVD (Digital Versatile Disc) player, CD (Compact Disc) player, digital camera, and the like. In addition to playback of content recorded on recording media, it can also be applied to playback of content contained in recording media by accessing the recording media installed on a server etc. from a device via a communication network such as the Internet. It is.

[0003]
There is a problem that it may stop.
[0013]
Further, in the methods described in Patent Document 1 to Patent Document 4, the importance for a video section to be reproduced is always constant regardless of whether or not a certain video section has been viewed. For this reason, for example, the importance of the video section of the answer part of the quiz differs depending on whether the video section of the problem part of the quiz program is viewed or not. However, in the methods described in Patent Document 1 to Patent Document 4, the importance is the same regardless of whether or not viewing is performed, and the importance depends on the viewed video section even when there is a viewed video section. There is a problem that cannot be changed.
[0014]
Further, the device described in Patent Document 5 determines the content to be presented to the user based on the playback time of the content regardless of the importance of the content. There is a problem that it is not possible to present content with a long time to the user.
[0015]
Therefore, a typical object of the present invention is to provide a content reproduction apparatus, a content reproduction method, and a content reproduction program for selecting a content section to be reproduced in accordance with a reproduced part and a remaining battery level.
Means for Solving the Problems [0016]
According to the first aspect of the present invention, the content reproducible time calculating means for calculating the content reproducible time based on the remaining battery level, and the content section that is the content section partitioned in the time direction, Reproduction target content importance calculation means for calculating importance of a content section to be reproduced and reproduction target content importance calculation means according to the reproduced content section for sections other than the reproduced content section. Content section selecting means for selecting a content section to be played back within the time calculated by the content playable time calculating means in accordance with the calculated importance, and content playing means for playing back content in the content section selected by the content section selecting means A content playback apparatus is provided.
[0017]
According to the second aspect of the present invention, a content reproducible time calculating step for calculating a content reproducible time based on a remaining battery level, and a content interval that is a content interval divided in a time direction, For sections other than the played content section, playback

[0004]
Within the time calculated in the content reproducible time calculating step according to the importance calculated in the reproduction target content importance calculating step and the importance calculated in the reproduction target content importance calculating step. There is provided a content playback method comprising: a content section selection step for selecting a content section to be played back; and a content playback step for playing back the content in the content section selected in the content section selection step.
[0018]
According to the third aspect of the present invention, a content reproducible time calculating step for calculating a content reproducible time based on a remaining battery level, and a content section that is a section of content divided in the time direction, A reproduction target content importance calculation step for calculating importance of a content section to be reproduced according to a reproduced content section with respect to a section other than the reproduced content section, and the reproduction target content importance calculation step The content section selecting step for selecting the content section to be played back within the time calculated in the content playable time calculating step and the content in the content section selected in the content section selecting step are played back according to the importance calculated in step A content playback step. Content playback program for causing playback method in a computer is provided.
Effects of the Invention [0019]
According to the present invention, it is possible to easily avoid a situation in which an important scene (content section) is not reproduced because power supply from the battery is stopped. The reason is that the importance level of each content section is calculated, and the content section to be played back is determined according to the calculated importance level based on the current playback position and the remaining battery level of the content playback apparatus.
[0020]
When the remaining battery level measured by the remaining battery level measurement means falls below a certain value, the content playback time is calculated based on the remaining battery level. Content can be played.
[0021]
It is configured to calculate the importance of each content section based on the degree of relevance between each content section after the currently playing location and each content section before the content segment including the currently playing location. If this is

According to a first aspect of the present invention, based on the remaining battery level, and the content playback time calculation means for calculating a reproduction time of the content, the content section is a section of the content separated in the time direction, advance The degree of association representing the relation between the content sections is determined, and the importance of the content section to be reproduced is set as the degree of association determined in advance between the content section to be reproduced and the reproduced content section. a reproduction target content importance calculating means for calculating on the basis of, in response to the reproduction target content importance calculating means severity was calculated, the content segment to be reproduced in the content reproduction time computation unit time calculated is a content section selecting means for selecting, playing the content in the content section the content section selection means has selected Content reproducing apparatus characterized by comprising: a content reproduction unit, is provided.

According to the second aspect of the present invention, a content reproducible time calculating step for calculating a content reproducible time based on the remaining battery level, and a content section that is a section of content divided in the time direction , in advance. The degree of association representing the relation between the content sections is determined, and the importance of the content section to be reproduced is set as the degree of association determined in advance between the content section to be reproduced and the reproduced content section. a reproduction target content importance calculating step of calculating on the basis of, the reproduction target content in accordance with the calculated degree of importance in the importance calculation step, the content segment to be reproduced in the content reproduction possible time calculated by the time calculation step The content section selection step to be selected and the content section selected in the content section selection step Content reproducing method for a content reproducing step of reproducing content, comprising the is provided.

According to a third aspect of the present invention, based on the remaining battery level, and the content playback time calculation step of calculating the reproduction time of the content, the content section is a section of the content separated in the time direction, advance The degree of association representing the relation between the content sections is determined, and the importance of the content section to be reproduced is set as the degree of association determined in advance between the content section to be reproduced and the reproduced content section. a reproduction target content importance calculating step of calculating on the basis of, the reproduction target content in accordance with the calculated degree of importance in the importance calculation step, the content segment to be reproduced in the content reproduction possible time calculated by the time calculation step The content section selection step to be selected and the content section selected in the content section selection step Content playback program for causing a content reproduction step of reproducing the content, the content playback method characterized by comprising a to a computer is provided.

Claims (12)

Content reproducible time calculating means for calculating content reproducible time based on the remaining battery power;
A reproduction target content importance calculating means for calculating importance of a content section to be reproduced according to a reproduced content section among the content sections that are content sections divided in the time direction;
Content section selecting means for selecting a content section to be played within the time calculated by the content playable time calculating means according to the importance calculated by the reproduction target content importance calculating means;
A content playback apparatus comprising: content playback means for playing back the content in the content section selected by the content section selection means. Including a battery level measuring means for measuring the battery level,
The content reproducible time calculating unit calculates a content reproducible time based on the remaining battery level when the remaining battery level measured by the remaining battery level measuring unit falls below a predetermined value. Playback device. A content section relevance storage unit that stores the relevance of content sections;
The reproduction target content importance level calculation unit is configured to store, for each content section after the currently played location, the relevance level of each content segment before the content segment including the currently played location with the content interval relevance storage unit The content reproduction apparatus according to claim 1, wherein the sum of the related degrees called is calculated as the importance of each content section. A content section relevance storage unit that stores the relevance of content sections;
When the time length calculated by the content reproducible time calculating unit is shorter than the time length of the content after the currently played location, the playback target content importance level calculating unit calculates each content section after the currently played location. On the other hand, the degree of relevance with each content section prior to the content section including the part that is currently being played is called from the content section relevance storage unit, and the sum of the called relevance is calculated as the importance of each content section. The content reproduction apparatus according to any one of claims 1 to 3. A content reproducible time calculating step for calculating a content reproducible time based on the remaining battery power;
A reproduction target content importance level calculating step for calculating the importance level of a content section to be played back according to the played content section among the content sections that are content sections divided in the time direction;
A content section selection step for selecting a content section to be played back within the time calculated in the content playable time calculation step according to the importance calculated in the playback target content importance calculation step;
A content playback method comprising: a content playback step of playing back content in the content section selected in the content section selection step. Including a battery level measurement step for measuring the battery level,
The content according to claim 5, wherein, when the remaining battery level measured in the remaining battery level measuring step is a predetermined value or less, the content reproducible time calculating step calculates the content reproducible time based on the remaining battery level. Playback method. In the content importance calculation step to be played back, the degree of relevance between the content sections before the content section including the part currently being played is calculated as the degree of relation between the content sections for each content section after the part currently being played. The content reproduction method according to claim 5 or 6, wherein a call is made from the stored content section relevance storage unit, and the sum of the called relevance is calculated as the importance of each content section. When the time length calculated in the content playable time calculation step is shorter than the time length of the content after the currently playing portion, the content target after the currently playing portion is calculated in the playback target content importance level step. On the other hand, the degree of relevance with each content section prior to the content section including the part currently being played is called from the content section relevance storage unit storing the degree of relevance between the content sections, The content reproduction method according to any one of claims 5 to 7, wherein the content reproduction method calculates the importance of the content section. A content reproducible time calculating step for calculating a content reproducible time based on the remaining battery power;
A reproduction target content importance level calculating step for calculating the importance level of a content section to be played back according to the played content section among the content sections that are content sections divided in the time direction;
A content section selection step for selecting a content section to be played back within the time calculated in the content playable time calculation step according to the importance calculated in the playback target content importance calculation step;
A content playback program for causing a computer to perform a content playback method, comprising: a content playback step of playing back content in a content section selected in the content section selection step. The content adjustment method includes a battery remaining amount measuring step of measuring a remaining battery amount,
10. The content reproducible time is calculated based on the remaining battery level in the content reproducible time calculating step when the remaining battery level measured in the battery remaining amount measuring step is a predetermined value or less. Playback program. In the content importance calculation step to be played back, the degree of relevance between the content sections before the content section including the part currently being played is calculated as the degree of relation between the content sections for each content section after the part currently being played. The content reproduction program according to claim 9 or 10, wherein the program is called from the stored content section relevance storage unit, and the sum of the called relevance is calculated as the importance of each content section. When the time length calculated in the content playable time calculation step is shorter than the time length of the content after the currently playing portion, the content target after the currently playing portion is calculated in the playback target content importance level step. On the other hand, the degree of relevance with each content section prior to the content section including the part currently being played is called from the content section relevance storage unit storing the degree of relevance between the content sections, The content reproduction program according to any one of claims 9 to 11, wherein the content reproduction program is calculated as the importance of the content section.

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