JP2005204030A - Apparatus and program for moving image reproduction - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To give a user an incentive to continuously view a moving image in a normal state, even if the moving image could not be viewed in the normal state, since the battery is dead. <P>SOLUTION: A moving image reproducing apparatus is driven by the battery 42 to reproduce and output contents (moving image) stored in, for example, a secondary storage device 26. A CPU 20 calculates the reproduction remaining time of the moving image; based on the rest of the battery detected by a battery detecting I/F 40 and decides whether the moving picture can be reproduced to the end within the calculated reproducible remaining time. When it is decided that the moving image cannot be reproduced to the end, a preview is generated, by extracting data of an unreproduced part of the moving picture; and after the preview has been reproduced by a display device 12, the operation is stopped (interrupted). <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a moving image playback apparatus that plays a moving image driven by a battery, and a moving image playback program that is executed by the apparatus.

  2. Description of the Related Art Conventionally, a moving image playback device driven by a battery consumes a large amount of power due to its characteristics such as arithmetic components and display components required for reproducing content (moving images and audio). For this reason, the playback duration by the built-in battery is often shorter than the time desired by the user. Therefore, there are cases where viewing is interrupted due to a battery exhaustion.

  When the battery runs out, the user feels discomfort (dissatisfaction, unachieved feeling) in the interruption. In addition, it may not be convenient for the user to view again after waiting for recharging, and content may be left without watching the continuation after the interruption.

Conventionally, in the content playback of the mobile terminal device, when the capacity of the built-in battery is insufficient, it has been considered to reduce the consumption of the built-in battery by reducing the CPU load in the playback of moving image data (for example, Patent Document 1).
JP 2002-77377 A

  In the portable terminal device described in Patent Document 1, in order to reduce power consumption, for example, normal playback such as reducing a moving image frame, reducing a moving image display area, and not reproducing audio data is performed. Are output in different forms. The user does not originally desire to view the content reproduced in such an unusual form. However, if the normal playback is continued, the playback is interrupted due to running out of the battery, and as described above, the user may feel uncomfortable and lose the willingness to view the content thereafter.

  It is an object of the present invention to make it possible for a user to have a motivation to view a continuation of a moving image in a normal state even if the moving image cannot be viewed in a normal state due to battery exhaustion. The object is to provide a moving image reproducing apparatus and a moving image reproducing program.

  According to the first aspect of the present invention, in a video playback device that is battery-powered and plays back a video, the time calculation means that calculates the remaining playable time of the video based on the remaining battery level, and the time calculation means A discriminating unit that discriminates whether or not the video can be played back to the end in the remaining playable time, and if the discriminating unit determines that the video cannot be played back to the end, an excerpt of the data of the unplayed part of the video is previewed And a reproduction end means for ending the reproduction operation after reproducing the preview created by the creation means.

  According to a second aspect of the present invention, in the first aspect of the present invention, the creation unit creates a preview so that playback can be performed with the remaining playback time calculated by the time calculation unit.

  According to a third aspect of the present invention, in a moving image playback apparatus that is battery-powered and plays back a moving image, the time calculating unit that calculates the remaining playable time of the moving image based on the remaining battery level is calculated by the time calculating unit. A discriminating unit for discriminating whether or not the video can be played to the end in the remaining playable time, and a remaining playable time calculated by the time calculating unit when the discriminating unit determines that the video cannot be played to the end And a playback ending means for ending the playback operation after playing back another moving image that can be played back by.

  According to a fourth aspect of the present invention, in the first or third aspect of the present invention, when it is determined by the determination means that the video cannot be reproduced until the end of the moving image, a notification display is displayed to notify that effect. And an input means for inputting a confirmation instruction for the display by the notification display means, and the reproduction end means reproduces the predetermined image when the confirmation instruction is inputted by the input means. The operation is terminated later.

  According to a fifth aspect of the present invention, in the first aspect of the invention, the creation unit detects a portion in which the audio feature amount falls within a predetermined range in the data, and creates a preview by extracting the data of the portion. It is characterized by doing.

  The invention according to claim 6 further comprises effect processing means for effecting the preview created by the creating means in the invention according to claim 1, wherein the playback means is adapted to perform effect processing by the effect processing means. A preview that has been processed is reproduced.

  According to a seventh aspect of the present invention, there is provided a video playback device that is driven by a secondary battery and plays back a video, a time calculation unit that calculates a remaining video reproducible time based on a remaining amount of the secondary battery, and A discriminating unit for discriminating whether or not the video can be played to the end with the remaining playable time calculated by the time calculating unit, and an unplayed portion of the video when the discriminating unit determines that the video cannot be played to the end Charging time calculating means for calculating the charging time for the secondary battery necessary for reproducing the battery, time display means for performing display for notifying the charging time calculated by the charging time calculating means, and the time And an interruption means for interrupting the reproduction of the moving image after the display means displays the notification of the charging time.

  The invention according to claim 8 is the notification display means according to the invention according to claim 7, wherein when the determination means determines that the video cannot be reproduced until the end of the moving image, the notification display means displays a notification to that effect; Input means for inputting a confirmation instruction for the display by the notification display means, wherein the interruption means interrupts the reproduction of the moving image when the confirmation instruction is input by the input means.

  According to a ninth aspect of the present invention, there is provided a time calculation means for calculating a remaining reproducible time of a moving image based on a remaining battery level at the time of dividing the moving image reproduction in a moving image reproducing device that is driven by a battery and reproduces a plurality of divided moving images. And determining means for determining whether or not the moving image can be reproduced to the next segment with the remaining reproducible time calculated by the time calculating unit, and determining that the moving image cannot be reproduced to the next segment by the determining unit. In this case, there is provided interruption means for interrupting reproduction of the moving image.

  According to a tenth aspect of the present invention, in the invention according to the ninth aspect, when the determination means determines that the moving image cannot be reproduced until the next segment, a notification display means for displaying to that effect And an input means for inputting a confirmation instruction for the display by the notification display means, wherein the interruption means interrupts the reproduction of the moving image when the confirmation instruction is input by the input means. To do.

  The invention described in claim 11 is a moving image reproducing program for controlling a moving image reproducing apparatus that is battery-driven and reproduces a moving image, wherein the computer calculates the remaining reproducible time of the moving image based on the remaining battery level. A time calculating means, a determining means for determining whether or not playback is possible up to the end of the moving image with the remaining playable time calculated by the time calculating means, and when the determining means determines that playback to the end is impossible And a creation unit that extracts data of an unreproduced portion of the moving image to create a preview, and a playback end unit that ends the playback operation after playing back the preview created by the creation unit.

  According to a twelfth aspect of the present invention, there is provided a moving image reproducing program for controlling a moving image reproducing apparatus that is driven by a battery and reproduces a moving image, and the computer calculates a remaining reproducible time of the moving image based on the remaining battery level. A time calculating means, a determining means for determining whether or not playback is possible up to the end of the moving image with the remaining playable time calculated by the time calculating means, and when the determining means determines that playback to the end is impossible Then, it is made to function as a reproduction end means for ending the reproduction operation after reproducing another moving image that can be reproduced with the remaining reproducible time calculated by the time calculating means.

A thirteenth aspect of the present invention is a moving image reproduction program for controlling a moving image reproducing apparatus that is driven by a secondary battery and reproduces a moving image. Time calculating means for calculating the remaining reproducible time, determination means for determining whether or not the replayable remaining time calculated by the time calculating means can be reproduced to the end of the moving image, and reproduction to the end by the determining means When it is determined that it cannot be performed, a charging time calculation unit that calculates a charging time for the secondary battery that is required to play the unplayed part of the video, and a notification of the charging time calculated by the charging time calculation unit And a time display means for performing a display for performing the display, and an interruption means for interrupting the reproduction of the moving image after the time display means is displayed to notify the charging time. The invention described in claim 14 is a video playback program for controlling a video playback apparatus that plays back a battery-driven video that is divided into a plurality of segments, and the computer is operated based on the remaining battery level at the time of video playback segmentation. A time calculating means for calculating the remaining playable time of the moving image, a determining means for determining whether or not the moving image can be played to the next break with the remaining playable time calculated by the time calculating means, and the determination When it is determined by the means that the moving image cannot be reproduced until the next break, it is made to function as an interruption means for interrupting reproduction of the moving image.

  According to the first aspect of the present invention, the remaining reproducible time of the moving image is calculated based on the remaining battery level, and when the remaining reproducible time is not reproducible until the end of the moving image, the data of the unreproduced portion of the moving image By creating a preview from this and playing the preview and then ending the playback operation, even if the video could not be viewed until the end due to battery exhaustion, It is possible to motivate to watch the continuation of the movie in a normal state.

  According to the second aspect of the present invention, in addition to the effect of the first aspect of the invention, a preview of the entire unreproduced part is presented to the user by creating a preview so that the reproducible remaining time can be reproduced. Thus, it is possible to motivate to watch the continuation of the video.

  According to the third aspect of the present invention, the remaining playable time of the movie is calculated based on the remaining battery level, and if the remaining playable time is not playable until the end of the movie, the remaining playable time can be played. When the other video is played, the playback operation is terminated and the playback of the other video can be completed. Compared to the case where the video is interrupted and terminated due to battery exhaustion, the user's Dissatisfaction (unachieved feeling) can be alleviated.

  According to the invention of claim 4, in addition to the effect of the invention of claim 1 or claim 3, when it is determined that playback is not possible until the end of the moving image, a display for notifying that effect is displayed. When the confirmation instruction for the display is input, the operation is terminated, so that the user does not feel uncomfortable as compared with the case where the user terminates without confirmation.

  According to the fifth aspect of the present invention, in addition to the effect of the first aspect of the invention, a portion where the audio feature amount in the data falls within a predetermined range is detected, and a preview is created by extracting the data of this portion. Thus, for example, if the content of the video is a movie, it is highly likely that it is a climax scene, so a preview that appropriately includes such a characteristic part is created and the video is displayed to the user. Can be motivated to watch the continuation of

  According to the sixth aspect of the present invention, in addition to the effect of the first aspect of the invention, the effect processing is performed on the preview, and the preview that has been subjected to the effect processing is reproduced, so that the moving image is intentionally not recorded. The content of the playback part can be made ambiguous. For example, when the content of the video is a drama or other content, it is possible to avoid inadvertently informing the user of the previous development and distracting the user. It can also be confused with normal playback.

  According to the seventh aspect of the present invention, when the reproducible remaining time of the moving image is calculated based on the remaining amount of the secondary battery and it is determined that the replayable remaining time is not reproducible until the end of the moving image, By displaying the display to calculate and notify the rechargeable battery charge time required to play the unplayed part of the video, even if the video playback is interrupted due to battery exhaustion, playback is performed by recharging. It is possible to allow the user to grasp the time until the user can resume the operation, minimize the interruption time, and prompt the early restart.

  According to the eighth aspect of the invention, in addition to the effect of the seventh aspect of the invention, when it is determined that the video cannot be reproduced until the end of the moving image, a display for notifying that effect is performed, and Since the reproduction of the moving image is interrupted when a confirmation instruction is input, it is possible to prevent the user from feeling uncomfortable as compared to the case of interrupting without confirmation.

  According to the ninth aspect of the present invention, the remaining reproducible time of the moving image is calculated based on the remaining battery level at the time point of the moving image playback, and the moving image cannot be played to the next break with the calculated remaining reproducible time. Since the video playback is interrupted if it is determined, for example, when the video is divided by a plurality of chapters, the playback of the video is interrupted at the time when the chapter is divided, so that the chapter is completed. Compared to the case where the video is interrupted and ended in the middle of a chapter due to running out of battery, user dissatisfaction (unsatisfied feeling) can be alleviated and return from interruption (resumption of playback) In this case, chapter search can be used, and the trouble at the time of return can be reduced.

  According to the invention of claim 10, in addition to the effect of the invention of claim 9, when it is determined that the moving image cannot be reproduced until the next break, a display for notifying that effect is performed, and this display When the confirmation instruction is input, the reproduction of the moving image is interrupted, so that the user does not feel uncomfortable as compared with the case where the user interrupts without confirmation.

  According to the eleventh aspect of the present invention, the computer calculates the remaining reproducible time of the moving image based on the remaining battery level, and when the remaining reproducible time is not reproducible until the end of the moving image, the moving image is not replayed. By extracting the data of the part and creating a preview, and playing the preview and then ending the playback operation, it is normal for the user even if the video cannot be viewed normally due to battery exhaustion Can be motivated to watch the continuation of the video in a different state.

  According to the twelfth aspect of the present invention, when the computer can calculate the remaining playable time of the moving picture based on the remaining battery level, and the remaining playable time is not playable until the end of the moving picture, the remaining playable time Playing other videos that can be played with, and playing the preview after playing this preview, the playback of the other videos can be completed, and the video is interrupted and terminated due to battery exhaustion. Compared with the case where it is, the dissatisfaction (unsatisfied feeling) with respect to a user can be relieved.

  According to the thirteenth aspect of the invention, the computer calculates the remaining playable time of the moving image based on the remaining amount of the secondary battery, and determines that the remaining playable time cannot be played until the end of the moving image. Displays a display to calculate and notify the charging time for the secondary battery required to play the unplayed part of the video, so that even if the video playback is interrupted, It is possible to allow the user to grasp the time until the reproduction can be resumed by charging, and to minimize the interruption time and prompt the early resumption.

  According to the fourteenth aspect of the present invention, the computer calculates the remaining reproducible time of the moving image based on the remaining battery level at the time when the moving image is replayed, and the moving image is divided into the next delimiter at the calculated remaining reproducible time If it is determined that the video cannot be played, the video playback is interrupted. For example, when the video is divided by a plurality of chapters, the playback of the video is interrupted at the point where the chapters are separated. Compared to the case where the video is interrupted and ended in the middle of a chapter due to running out of battery, user dissatisfaction (unsatisfied) can be alleviated, and recovery from playback (playback) Chapter search can be used in the case of resuming), and the trouble of returning can be reduced.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a diagram showing an external configuration of a moving image playback apparatus 10 according to an embodiment of the present invention. The moving image reproducing apparatus 10 according to the present embodiment can include a computer function that reads a program recorded on a recording medium such as a semiconductor memory, a CD-ROM, a DVD, or a magnetic disk and whose operation is controlled by the program. .

  The moving image reproducing apparatus 10 is provided with a display device 12 (for example, an LCD (Liquid Crystal Display)). In addition, a plurality of input buttons 14 for inputting various instructions to the moving image playback apparatus 10 and a speaker 16 for outputting sound are provided.

FIG. 2 is a block diagram showing a functional configuration of the moving image playback apparatus 10 in the present embodiment.
As shown in FIG. 2, the moving image playback device 10 in this embodiment includes a CPU 20, a main memory 22, a secondary storage interface (I / F) 24, a secondary storage device 26, a display device I / F 28, a display device 12, An audio output I / F 32, an audio output device 16, an input button I / F 36, an input button 14, a battery detection I / F 40, a battery 42, and an external I / F 44 are provided.

  The CPU 20 controls the entire moving image playback apparatus 10 and executes various processes by executing various programs in addition to the OS (operating system) and the system control program (moving image playback program) stored in the main memory 22. To do. For example, main processing for reproducing content data (stream data) including moving images and sound by a moving image reproduction program to display moving images on the display device 12 and outputting sound from the sound output device 16 is performed. Execute. The main process includes an exception process for displaying a preview of an unreproduced portion when the remaining battery level of the battery 42 is low and not all the moving images can be reproduced within the reproducible time (details will be described later).

  The main memory 22 stores various programs and data accessed by the CPU 20. The program stored in the main memory 22 includes a program for realizing a decoding processing module for moving images and sounds. The main memory 22 is provided with an output buffer (FIFO) that can store sound and images (moving images) for several seconds each.

  The secondary storage I / F 24 controls the writing or reading of the content data with respect to the secondary storage device 26 under the control of the CPU 20.

  The secondary storage device 26 stores various programs such as an OS and a system control program (moving image reproduction program) or content data files under the control of the secondary storage I / F 24. For example, a flash memory Recording media such as hard disks are used.

  The display device I / F 28 controls display on the display device 12 (LCD) under the control of the CPU 20.

  The display device 12 displays a moving image or the like under the control of the display device I / F 28.

  The audio output I / F 32 controls audio output from the audio output device 16 (speaker) under the control of the CPU 20.

  The input button I / F 36 detects an input operation performed on the input button 14 by the user and notifies the CPU 20 of the input operation.

  The battery detection I / F 40 includes a voltage measurement component for the battery 42, reads the voltage value (remaining battery level) of the battery 42, and notifies the CPU 20 of the voltage value.

  The battery 42 supplies electric power to each unit. For example, a lithium ion secondary battery or the like is used, and a voltage value indicating the remaining amount is read by the battery detection I / F 40. Further, when the battery 42 is a secondary battery, it can be charged via a charging device (not shown).

  The external I / F 44 is an interface for connecting various external devices and networks (including LAN, Internet, public line network, etc.). The external I / F 44 can receive a file of content data, for example, via a network under the control of the CPU 20. It is also possible to read a content data file recorded on a recording medium of an external device.

The moving image playback apparatus 10 according to the present embodiment performs basic operations as follows when the power is turned on.
First, the CPU 20 executes a boot loader, loads an OS from the secondary storage device 26, and loads and executes a system control program (moving image reproduction program) on the OS environment. It is assumed that the secondary storage device 26 has a file system and stores a plurality of content data files according to the user's preference in addition to programs and setting files.

  The video playback device 10 can receive the content data file to be played back from the server device connected to the network through the external I / F 44 by communication and record it in the secondary storage device 26. By loading a recording medium (flash memory or the like) on which a file is recorded in the secondary storage device 26, the file can be captured.

  The data file handled here is, for example, a movie or television program of several minutes to several hours, for example, a video and audio encoding, and then multiplexed into a single stream (sequential file) For example, it is assumed that MPEG (Moving Picture Experts Group) standard encoding is performed. The content data file can be randomly accessed. For example, it is assumed that decoding of an image is performed in units of 30 frames per second and decoding of audio is performed in units of 20 frames per second.

  Audio can be decoded independently for each frame, and images can be decoded independently starting from an I frame (according to the MPEG standard) inserted at least one frame in 0.5 seconds. Is possible. The number of pixels is, for example, 352 vertical pixels and 240 horizontal pixels.

  The system control program starts main processing and output processing that operate in parallel after initialization. The main processing by the system control program (moving image reproduction program) basically executes processing similar to that of a general MPEG player program, but executes exception processing described later as a feature of the invention of the present invention.

(First embodiment)
Next, the operation of the video playback device 10 in the first embodiment will be described with reference to a flowchart.

  FIG. 3 shows a flowchart for explaining the main processing in the first embodiment.

  First, the CPU 20 sequentially reads the content data (stream) stored in the secondary storage device 26 designated by the user's operation on the input button 14 from the top (step A1), and the moving image data and audio data from the stream data. Are demultiplexed (separated) (step A2). Then, the CPU 20 calls each of the moving image decoding processing module and the audio decoding processing module, decodes each of the moving image data and the audio data, and writes the decoding result in the output buffer. The output buffer is used as a FIFO (First In First Out) buffer that can store sound and images for several seconds each.

  The decoding processing module decodes the audio frame and the image frame for each frame (steps A4 and A5).

  Here, the moving image reproducing apparatus 10 according to the first embodiment executes exceptional processing (step A6). Details of the exception processing will be described later.

  The CPU 20 executes the above processing to the end of the stream data (step A7).

  On the other hand, in the output process executed in parallel with the main process, the audio written in the output buffer is output from the audio output device 16 through the audio output I / F 32, and an image (moving image) is displayed on the display device I / F 28. Through the display device 12. In the output process, audio is sequentially output without interruption, and images are sequentially output in synchronization therewith.

Next, details of exception processing during main processing will be described with reference to the flowchart shown in FIG.
In the exception processing, two types of tables, that is, the reproducible time table shown in FIG. 5 and the recharge time table shown in FIG. 6 are fixedly described as a part of the system control program, or separately. Prepare as control data.

  As shown in FIG. 5, the reproducible time table stores data indicating the continuous reproducible time in association with the voltage measurement value of the battery 42. In the example shown in FIG. 5, data indicating the reproducible time at each stage (every 0.1 V) until the voltage of the battery 42 drops from 9.4 V to 7.4 V is stored. For example, when the voltage measurement value is 9.4 V, it indicates that there is a continuous reproducible time of 7200 seconds.

  As shown in FIG. 6, the recharge time table stores data indicating the charge time required to obtain a voltage higher by 0.1 V than the measured voltage value of the battery 42. The charging time required from a certain voltage measurement value to full charge (for example, 9.4 V) is 0.1 V for each voltage measurement value from the voltage measurement value of the recharge table to the voltage value of the file charge. Can be obtained by integrating the values of the charging times. Note that the charging time until the voltage value becomes an arbitrary voltage value instead of the full charge can be obtained by similarly integrating the charging times recorded in the respective tables from the voltage measurement value to the voltage value. When used with the playable time table, given the length of the stream you want to play, get the voltage value needed to play it all, and if the current voltage value falls below it, It is possible to obtain a charging time necessary for charging up to a reproducible voltage value.

  First, the CPU 20 checks the current voltage value of the battery 42 through the battery detection I / F 40 (for example, 0.1 V accuracy). Here, it is determined whether the voltage value of the battery 42 is smaller than a preset threshold voltage or, for example, less than 7.5 V (step B1).

  Here, if the current voltage value of the battery 42 is smaller than the threshold voltage value, the CPU 20 calculates the continuous reproducible time with reference to the reproducible time table based on the current voltage value of the battery 42 (step S31). B2).

  Then, it is determined whether the continuously reproducible time is shorter than the remaining reproduction time (stream remaining time) for an unreproduced stream (step B3). As a result, when the continuous reproducible time is shorter, the following processing is executed (steps B4 to B8). The remaining reproduction time of the stream can be obtained by subtracting the elapsed reproduction time from the time necessary for reproducing the entire length read from the header of the MPEG stream.

  First, the CPU 20 causes the display device 12 to notify the user that the entire content cannot be reproduced and output because the remaining battery level is insufficient, for example, “Battery runs out and playback is interrupted”. Is displayed (step B4). It is also possible to notify the voice output device 16 by outputting a message by voice or by outputting a predetermined sound effect or the like.

  Next, the CPU 20 scans the rest of the stream data, and decodes and outputs only a part as follows. Hereinafter, this decoding / output process is referred to as a preview process.

  Next, details of the preview process will be described with reference to the flowchart shown in FIG.

  The CPU 20 reads unreproduced stream data (step C1), demultiplexes, and detects an I frame that can be decoded independently thereafter (step C3). When an I frame is detected, the CPU 20 reads, for example, 500 msec of stream data (encoded data) from this I frame and demultiplexes it (steps C4 and C5). First, only the audio frame is decoded and stored in a temporary buffer. Store (step C6). The encoded data for 500 msec is 25 frames of voice.

  The CPU 20 calculates an audio feature amount for the audio data stored in the temporary buffer, and determines whether the audio feature amount falls within a predetermined range or a portion (time). Here, it is assumed that the sound level (size) is used as the sound feature amount. In order to facilitate the determination of the corresponding part, the CPU 20 calculates, for example, the mean square of the sound volume as the sound level (step C7), and whether or not it is higher than a preset threshold value. Is discriminated (step C8).

  If the audio level is higher than the threshold value, the CPU 20 performs decoding on the image frame, stores it in the temporary buffer, and performs an effect process to be described later on the decoded image (step C10). The audio is synchronized and written sequentially to the output buffer (step C11). Note that the encoded data for 500 msec is an image of 15 frames.

  Thereafter, the CPU 20 skips, for example, about 60 seconds of data (step C12), detects the next I frame in the same manner as described above, and performs the same processing until all stream data of the unreproduced portion is completed. Execute (Steps C13, C1 to C12).

  In addition, although the voice level (amplitude) is targeted as the voice feature amount described above, it is determined by extracting a part having a low voice level, a silent part, or a part including a characteristic sound. It is also possible to discriminate other feature amounts as targets.

FIG. 8 is a flowchart showing details of the effect process.
In the effect processing, image processing is performed on each decoded frame image so that the peripheral portion of the screen is masked and only the central portion of the screen is shown as a preview.

  That is, the CPU 20 initializes X and Y values indicating the pixel of interest in the frame image to 0 (steps D1 and D2), and the coordinate position of (X, Y) is outside the rectangle indicating the center of the screen in which the coordinate position is set in advance. It is determined whether or not (step D3). For example, if the coordinate positions of two diagonal points indicating a rectangle are (X1, Y1)-(X2, Y2), the inside of the rectangle indicated by (60, 88)-(179, 263) is the center of the screen.

  Here, when the pixel position of interest is outside the rectangle, the CPU 20 outputs the pixel value “0”, that is, the pixel value overwritten with the luminance and the color difference “0” as data for writing to the output buffer. (Step D4). Note that, as a reference image for MPEG inter prediction, it is necessary to hold an image without effect processing.

  On the other hand, when the position of the pixel of interest is within the rectangle, the CPU 20 uses the pixel value as it is as data to be written in the output buffer.

  The CPU 20 executes the above processing until the value of X becomes 352 or more indicating the image size while sequentially updating the value of X at the position (X, Y) of the target pixel (step D5) (steps D6, D3). ~ D5). When the value of X becomes 352 or more, the value of Y is updated (step D7), and the same processing is executed thereafter. When the processing for all the pixels with respect to a certain value of X is completed, the value of Y is updated (step D7), and the same processing as described above is executed until the value of Y becomes 240 or more (steps D8, D2). ~ D7).

  Thus, by creating a preview with effect processing, it is possible to avoid confusion with normal playback.

  When the preview process ends, the CPU 20 continues the stream of the unreproduced portion from the current voltage value of the battery 42 based on the current voltage value of the battery 42, the reproducible time table, and the recharge time table. The charging time required to charge up to the voltage value necessary for complete reproduction is calculated (step B6).

  For example, when the time required to reproduce all the streams of the unreproduced portion is 6480 seconds, it is determined from the reproduction time table that the voltage value of the battery 42 needs to be charged to 9.2V. Therefore, when the voltage value of the battery 42 at the present time is 7.6 V, charging until obtaining 0.1 V for each voltage value recorded in the recharge time table from 7.6 V to 9.2 V is obtained. By integrating the time, the required charging time can be calculated.

  The CPU 20 displays a message on the display device 12 for notifying the user of the required charging time, for example, “The battery has run out. Please charge for at least X minutes to play this continuation” Is displayed (step B7). Note that X in the message is a character string of a numerical value indicating the charging time depending on the state at that time. For example, the charging time is divided by 60 and rounded up to a minute unit. It is also possible to output a message by voice from the voice output device 16.

  After that, the CPU 20 does not return to the main process (does not execute the normal decoding process), executes the shutdown process, turns off the power, and ends the operation (step B8).

  In the above description, when all the unreproduced parts cannot be reproduced within the continuous reproducible time, the user is notified that the operation is interrupted, and the preview process and the shutdown process are executed to terminate the operation. When notifying that the playback is not possible until the end and inputting a confirmation instruction from the user in response to this notification, the operation may be terminated (shut down) after the preview is displayed as described above.

  In this case, when the confirmation of the end of the operation is not input from the user, the normal reproduction operation is performed as long as the remaining amount of the battery 42 is operable.

  Also, if all unplayed parts cannot be played within the continuous playable time, the preview process is not executed, the charging time required to play the unplayed parts is calculated, the user is notified, and the playback operation is interrupted You may make it let it. In this case, the position of the stream where playback is interrupted is recorded, and after recharging, the playback of the stream is resumed from the interrupted portion.

  Similarly to the above, it is also possible to notify that playback is not possible until the end, and to interrupt the operation when a confirmation instruction is input from the user in response to this notification.

  In this way, in the first embodiment, by extracting the data of the unplayed part and creating and playing a preview, even if the normal state of the video cannot be viewed due to battery exhaustion, The user can be motivated to view the continuation of the moving image in a normal state after charging.

Note that the moving image playback device 10 of the first embodiment can be modified as follows.
In the above description, the case where the reproduction operation is stopped (or interrupted) due to the battery being exhausted is targeted, but the present invention can be applied to the case where the reproduction operation is stopped (interrupted) in other situations. For example, when the internal temperature rises due to an overload of the video playback device 10 and stops, it is stopped due to a shortage of balance in the billing system or a limit on the amount of usage required when receiving content data from an external server device In some cases, reproduction may be interrupted due to disconnection or the like due to server maintenance or the like in the network system. The present invention can be applied as long as the remaining reproducible time can be estimated.

  Also, in the exception process, the continuous playable time is calculated, and it is determined based on this time whether all the unplayed parts can be played back. If an equivalent effect can be obtained indirectly, such as a determination based on the total amount of electric power, the determination may be made by another method.

  In the preview process, only the image is described, but the same process as the preview process for the image so that the contents of the unreproduced part can be partially grasped in the same manner for the sound. You can also. In addition, processing may be executed only for audio or only for images, or for both. In that case, the user may arbitrarily specify whether the processing target is an image or a sound, or both.

  In addition, in the above description, the description is made on the assumption that the content (stream data) is a video format with inter prediction such as MPEG, but data using other video formats such as Motion JPEG (Joint Photographic Experts Group). Can be targeted.

  In the preview process, the image frame to be previewed is extracted based on the audio feature amount (audio level), but the target frame (image, audio) is previously recorded according to the mark recorded by the producer when authoring the original data. ) May be excerpted. In that case, a preview intended by the creator can be provided to the user.

  In the preview process, a uniform absolute threshold value is given as a determination criterion for the audio level to simplify the explanation. However, this threshold value may be adaptively changed and can be acquired from audio data. You may make it discriminate | determine finely by the presence or absence of a frequency component, a pitch, whether it is a human voice, etc.

  Further, in the effect processing described with reference to FIG. 8, image processing is performed in which the peripheral portion of the screen is masked and only the central portion of the screen is shown as a preview. Image processing such as cut by low-pass filter, color conversion, negative / positive conversion, reduction conversion, emboss filter, and overlap of other images. A plurality of image processes may be executed in combination, or which image process is used may be selected and executed by the user.

  Further, the effect process may be a process integrated with the decoding process, not an independent process. For example, in MPEG decoding, it is possible to perform monochrome processing simply by not decoding color difference components.

  The effect processing may be performed with different effect effects depending on the contents. In this case, the moving image playback apparatus 10 determines the content of the content to be played back, and applies effect processing according to the determined content of the content to the preview (image, audio). The content content may be determined in any way, such as data added to the stream data, designation from the user at the time of reproduction, classification stored in the secondary storage device 26, and the like. For example, in a movie or drama, if the user knows the previous contents by previewing, the content of the unplayed part may be intentionally reduced because it may reduce the willingness to play the unplayed part in a normal state. Gives a strong effect that makes it ambiguous. In addition, there is a case where a user has a request to grasp all contents by preview while operating, without giving a normal effect in a variety program, and without having to play it in a normal state in news and educational programs. It may be possible to make a change such as not applying. How much or what kind of effect is applied to the content of which content may be fixedly determined in advance, or may be arbitrarily designated by the user.

  Further, in the above description, the preview is created in the moving image playback device 10, but when stream data is received from the server device, the preview data is received from the server device and played back and output. good. In this case, when it is determined that the remaining amount of the battery 42 is low and the entire stream cannot be reproduced, the server apparatus is notified together with data indicating the continuous reproduction possible time through the network. In this case, the server device creates a preview according to the continuous playable time or transmits a preview prepared in advance to the moving image playback device 10. The video playback device 10 plays back the preview received from the server device. As a result, the load on the moving image playback device 10 side can be reduced.

(Second Embodiment)
Next, a second embodiment of the present invention will be described.
In the first embodiment, a preview is created and output using content (stream data) of an unreproduced part in the preview process, but in the second embodiment, another content (reproducible within a continuous reproducible time) ( (Stream data) is played back.

  In the second embodiment, a stream substitution process is executed instead of the preview process in the exception process (FIG. 4) of the first embodiment. FIG. 9 is a flowchart for explaining stream substitution processing in the second embodiment. The other processing is executed in the same manner as in the first embodiment, and detailed description thereof is omitted.

  In the stream substitution processing, first, based on the continuous playable time calculated in step B2, content data files that can be played within this time are stored in, for example, the secondary storage device 26 (file system) or the external I / F 44. The server device connected through the network is searched for. At this time, the content to be searched for may be specified in advance by the user, or may be searched for the same or related field as the currently reproduced content.

  When a reproducible content is found within the continuous reproducible time (step E2, Yes), the CPU 20 reads the stream data file of the corresponding content (step E3), and from the stream data to the moving image data. The audio data is demultiplexed (separated) (step E4). Then, the CPU 20 calls the moving image decoding processing module and the audio decoding processing module, respectively, and decodes the moving image data and the audio data for each frame (steps E6 and E7). The decoding result for the audio data is written to the output buffer. On the other hand, the decoding result for the image treading is written in the temporary buffer.

  The CPU 20 performs effect processing on the decoding result for the image frame written in the temporary buffer (step E8), and writes the image on which the effect has been applied to the output buffer. Note that the effect process in step E8 can be executed in the same manner as the effect process described in the first embodiment.

  The CPU 20 executes the above processing to the end of the stream data (step E10).

  On the other hand, in the output process executed in parallel with the main process, the audio written in the output buffer is output from the audio output device 16 through the audio output I / F 32, and an image (moving image) is displayed on the display device I / F 28. Through the display device 12. In the output process, audio is sequentially output without interruption, and images are sequentially output in synchronization therewith.

  In this way, in the second embodiment, by playing back other content (stream data) that can be played back in the remaining playable time, at least the playback of the replaced content is completed and the operation is terminated (interrupted). And the user's dissatisfaction (unsatisfied) can be alleviated.

  Also in the second embodiment, each modification described in the first embodiment can be applied as appropriate.

  In the above description, the effect process is executed (step E8), but this may be omitted. Further, whether or not to execute the effect process may be arbitrarily set according to the user's designation.

(Third embodiment)
Next, a third embodiment of the present invention will be described.
In the first and second embodiments, when the operation is stopped (or interrupted) due to battery exhaustion or the like, the operation is stopped (interrupted) at an arbitrary position in the stream. However, in the third embodiment, the content is a chapter (chapter). ) Or the like, the content is stopped (interrupted) at this separation position.

  FIG. 10 shows a flowchart for explaining the main processing in the third embodiment.

  First, the CPU 20 selects the first stream of content stored in the secondary storage device 26 designated by the user's operation on the input button 14 (step F1), and opens the selected stream (step F2). For example, the entire content is reproduced by sequentially reproducing the stream for each chapter from the initial stream.

  Here, the CPU 20 reads the current voltage value of the battery 42 and calculates the continuous reproducible time with reference to the reproducible time table (FIG. 5) based on this voltage value (step F3).

  Then, it is determined whether the continuously reproducible time is shorter than the reproduction time (stream reproduction time) of the selected stream (step F4). The stream playback time can be obtained by referring to the entire length read from the header of the MPEG stream.

  As a result, if the continuous reproducible time is not shorter than the stream reproduction time, the CPU 20 reads the stream data (step F5) and demultiplexes (separates) the moving image data and audio data (step F6). Then, the CPU 20 calls each of the moving image decoding processing module and the audio decoding processing module, decodes each of the moving image data and the audio data, and writes the decoding result in the output buffer. The decoding processing module decodes the audio frame and the image frame for each frame (steps F7, F8, F9).

  In the output process executed in parallel with the main process, the audio written in the output buffer is output from the audio output device 16 through the audio output I / F 32, and an image (moving image) is displayed through the display device I / F 28. The device 12 outputs the data. In the output process, audio is sequentially output without interruption, and images are sequentially output in synchronization therewith.

  The CPU 20 executes the above processing up to the end of the stream data (step F10).

  Here, when the reproduction is completed to the end of the stream, the CPU 20 selects a stream corresponding to the next chapter (step F13), and thereafter performs the same processing as described above to perform a reproduction operation.

  At this time, if it is determined in step F4 that the continuous reproducible time is shorter than the stream reproduction time, the CPU 20 indicates that the entire content cannot be reproduced and output because the battery level is insufficient in the display device 12. A message for notifying the user, for example, a message with a text “There is not enough battery power to play the next chapter” is displayed (step F11). It is also possible to notify the voice output device 16 by outputting a message by voice or by outputting a predetermined sound effect or the like.

  Thereafter, the CPU 20 executes a shutdown process to turn off the power and finish the operation (step F12).

  In the above description, when all the streams corresponding to the chapters cannot be reproduced within the continuous playable time, the operation is terminated by notifying the user that the operation is interrupted, It is also possible to notify that the reproduction is not possible until the end, and to end (shut down) the operation when a confirmation instruction is input from the user in response to this notification. In this case, when the confirmation of the end of the operation is not input from the user, the normal reproduction operation is performed as long as the remaining amount of the battery 42 is operable.

In this way, in the third embodiment, the playback is interrupted when it is determined that the playback cannot be performed until the next chapter break. Can complete the regeneration. Therefore, as compared with the case where the moving image is interrupted and ended in the middle of the chapter due to the battery running out, the dissatisfaction (unsatisfied) with respect to the user can be alleviated. Furthermore, chapter search can be used when returning from interruption (resuming playback), and the time and effort required for returning can be reduced. Further, it is only necessary to determine whether or not the target stream can be played back within the continuous playable time only at the time of chapter separation, and the processing load can be reduced. The device 10 can be modified as follows.
In the above description, stream data for each chapter is provided independently. However, chapters may be divided by marking the inside of one stream data file.

  Further, it is determined whether or not all the stream data corresponding to each chapter can be reproduced within the continuously reproducible time (step F4), but it is not always necessary to determine all the chapters. You can do it alone. In addition, the range for checking whether playback is possible is not necessarily limited to one chapter, but a plurality of chapters are targeted, and it is determined whether playback is possible up to any one of the boundaries. May be. Further, the determination process may be performed only at the beginning of a plurality of stream data corresponding to a plurality of chapters.

Further, the first embodiment or the second embodiment can be combined.
Further, although it is determined whether or not playback is possible at the beginning of the chapter, it may be determined at the end of the chapter.
Also in the third embodiment, each modification described in the first embodiment can be applied as appropriate.

  In addition, the processing described in each of the above-described embodiments is, for example, a magnetic disk (flexible disk, hard disk, etc.), an optical disk (CD-ROM, DVD, etc.), a semiconductor memory, etc. It can be written on a recording medium and provided to various apparatuses. It is also possible to transmit to a variety of devices by transmitting via a communication medium. A computer that implements the video playback device 10 reads the video playback program recorded on the recording medium or receives the video playback program via the communication medium, and the operation is controlled by this program, so that the processing described above is performed. Execute.

  Further, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent elements are deleted from all the constituent elements shown in the embodiment, at least one of the problems described in the column of problems to be solved by the invention can be solved, and described in the column of the effect of the invention. In a case where at least one of the obtained effects can be obtained, a configuration in which this configuration requirement is deleted can be extracted as an invention.

The figure which shows the external appearance structure of the moving image reproduction apparatus 10 concerning embodiment of this invention. The block diagram which shows the function structure of the moving image reproduction apparatus 10 in this embodiment. The flowchart for demonstrating the main process in 1st Embodiment. The flowchart for demonstrating the detail of the exception process in 1st Embodiment. The figure which shows an example of the reproducible time table in 1st Embodiment. The figure which shows an example of the recharge time table in 1st Embodiment. 6 is a flowchart for explaining details of preview processing in the first embodiment. The flowchart for demonstrating the detail of the effect process in 1st Embodiment. The flowchart for demonstrating the stream alternative process in 2nd Embodiment. The flowchart for demonstrating the main process in 3rd Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Movie reproduction apparatus, 12 ... Display device (LED), 14 ... Input button, 16 ... Audio | voice output device (speaker), 20 ... CPU, 22 ... Main memory, 24 ... Secondary storage I / F, 26 ... Secondary Storage device 28 ... Display device I / F, 32 ... Audio output I / F, 36 ... Input button I / F, 40 ... Battery detection I / F, 42 ... Battery, 44 ... External I / F.

Claims (14)

In a video playback device that is battery powered and plays video,
Time calculation means for calculating the remaining playable time of the video based on the remaining battery power,
Discriminating means for discriminating whether or not playback is possible up to the end of the moving image with the remaining playable time calculated by the time calculating means;
A creation means for creating a preview by extracting the data of the unplayed portion of the video when it is determined by the determination means that the playback cannot be completed to the end;
A moving image reproducing apparatus comprising: a reproduction ending unit that reproduces the preview created by the creating unit and then ends the reproduction operation.   2. The moving image reproducing apparatus according to claim 1, wherein the creating unit creates a preview so that the reproduction is possible with the remaining reproducible time calculated by the time calculating unit. In a video playback device that is battery powered and plays video,
Time calculation means for calculating the remaining playable time of the video based on the remaining battery power,
Discriminating means for discriminating whether or not playback is possible up to the end of the moving image with the remaining playable time calculated by the time calculating means;
Replay end means for ending a replay operation after replaying another video that can be replayed with the remaining reproducible time calculated by the time calculation means when it is determined by the determination means that it cannot be played back to the end. A video playback apparatus characterized by that. When it is determined by the determination means that the video cannot be reproduced until the end of the video, a notification display means for displaying to that effect;
Input means for inputting a confirmation instruction for the display by the notification display means,
4. The moving image reproducing device according to claim 1, wherein the reproduction ending unit ends the operation after reproducing the predetermined image when a confirmation instruction is input by the input unit.   2. The moving image reproducing apparatus according to claim 1, wherein the creating unit detects a portion in which the audio feature amount falls within a predetermined range in the data, and creates a preview by extracting the data of the portion. Further comprising effect processing means for performing effect processing on the preview created by the creating means;
2. The moving image reproduction apparatus according to claim 1, wherein the reproduction unit reproduces a preview subjected to the effect processing by the effect processing unit. In a video playback device that is driven by a secondary battery and plays a video,
Time calculating means for calculating a remaining playable time of the video based on the remaining amount of the secondary battery;
Discriminating means for discriminating whether or not playback is possible up to the end of the moving image with the remaining playable time calculated by the time calculating means;
A charging time calculating means for calculating a charging time for the secondary battery that is necessary for reproducing the unreproduced portion of the moving image when it is determined by the determining means that it cannot be reproduced to the end;
Time display means for performing display for notifying the charging time calculated by the charging time calculating means;
A moving picture reproducing apparatus comprising: interruption means for interrupting reproduction of a moving picture after the time display means displays the notification of the charging time. When it is determined by the determination means that the video cannot be reproduced until the end of the video, a notification display means for displaying to that effect;
Input means for inputting a confirmation instruction for the display by the notification display means,
8. The moving image reproducing apparatus according to claim 7, wherein the interruption unit interrupts reproduction of the moving image when a confirmation instruction is input by the input unit. In a video playback device that plays a battery-powered video segmented into a plurality of segments,
A time calculation means for calculating the remaining playable time of the video based on the remaining battery level at the time of the video playback break,
Discriminating means for discriminating whether or not the moving image can be reproduced up to the next segment with the remaining reproducible time calculated by the time calculating unit;
A moving picture reproducing apparatus comprising: interrupting means for interrupting reproduction of a moving picture when the judging means determines that the moving picture cannot be reproduced until the next break. A notification display means for displaying a notification to that effect when it is determined by the determination means that the moving image cannot be reproduced until the next break;
Input means for inputting a confirmation instruction for the display by the notification display means,
10. The moving image reproducing apparatus according to claim 9, wherein the interruption unit interrupts reproduction of the moving image when a confirmation instruction is input by the input unit. A video playback program for controlling a battery-driven video playback device that plays back video,
Computer
Time calculation means for calculating the remaining playable time of the video based on the remaining battery power,
Discriminating means for discriminating whether or not playback is possible up to the end of the moving image with the remaining playable time calculated by the time calculating means;
A creation means for creating a preview by extracting the data of the unplayed portion of the video when it is determined by the determination means that the playback cannot be completed to the end;
A moving image playback program for functioning as a playback end unit that ends a playback operation after playing back a preview created by the creating unit. A video playback program for controlling a battery-driven video playback device that plays back video,
Computer
Time calculation means for calculating the remaining playable time of the video based on the remaining battery power,
Discriminating means for discriminating whether or not playback is possible up to the end of the moving image with the remaining playable time calculated by the time calculating means;
When it is determined by the determining means that it cannot be played back to the end, it functions as a playback ending means for ending the playback operation after playing another video that can be played back with the remaining playable time calculated by the time calculating means. Movie playback program for. A video playback program for controlling a video playback device that is driven by a secondary battery and plays back a video,
Computer
Time calculating means for calculating a remaining playable time of the video based on the remaining amount of the secondary battery;
Discriminating means for discriminating whether or not playback is possible up to the end of the moving image with the remaining playable remaining time calculated by the time calculating means;
A charging time calculating means for calculating a charging time for the secondary battery that is necessary for reproducing the unreproduced portion of the moving image when it is determined by the determining means that it cannot be reproduced to the end;
Time display means for performing display for notifying the charging time calculated by the charging time calculating means;
A moving picture reproduction program for functioning as interruption means for interrupting reproduction of a moving picture after the time display means is notified of the charging time. A video playback program for controlling a video playback device that plays a battery-powered and partitioned video,
Computer
A time calculation means for calculating the remaining playable time of the video based on the remaining battery level at the time of the video playback break,
Discriminating means for discriminating whether or not the moving image can be reproduced up to the next segment with the remaining reproducible time calculated by the time calculating unit;
A moving image reproduction program for functioning as interruption means for interrupting reproduction of a moving image when the determining means determines that the moving image cannot be reproduced until the next break.

Images