JP2000023105A - Method and device for prolonging/reducing reproducing time - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reproducing time prolonging/reducing method capable of easily prolonging/reducing the reproducing time of digitized video in a short time without making a viewer feel the sense of incompatibility. SOLUTION: Concerning this reproducing time prolonging/reducing method, the reproducing time of video is prolonged by sending the frame of small video change rate and low audio level twice (steps S706-S711) and the reproducing time of video is reduced by dropping the frame of small video change rate and low audio level (step S702-S705). Thus, the reproducing time can be easily prolonged/reduced in a short time in comparison with the prolongation/reduction of reproducing time through editing. Besides, since the musical scale of sounds is not lowered while decelerating the motion of video or the musical scale of sounds is not made high while quickening the motion of video in comparison with the prolongation/reduction of reproducing time through the change of reproducing speed, the sense of incompatibility to be felt by the viewer can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of processing a video, and more particularly, to a method of extending or reducing a reproduction time of a digitized video.

[0002]

2. Description of the Related Art In recent years, broadcasting stations and video production companies have
Non-linear editing systems have come into wide use. In a non-linear editing system, digitized video is taken into a computer and processed in a software manner, so that editing operations such as cut splitting and special effects can be performed easily and at high speed as compared with a tape editing system.
By the way, when playing back an edited video that has been edited using a non-linear editing system, there are cases where it is desired to play back the video while expanding or contracting (expanding / reducing) the playback time. For example, in a broadcasting station,
When broadcasting the edited video, the broadcast schedule may be shifted due to the effect of extraordinary news, etc. In such a case, if the broadcast time of the edited video is expanded or shortened and broadcasted, the generated shift can be resolved . Conventionally, in order to extend or shorten the playback time of an edited video, the edited video is re-edited by changing the playback speed or deleting a part of the video or adding another video.

[0003]

However, in the method of changing the reproduction speed, the movement of the video is slowed down and the pitch of the sound (attached to the video) is lowered, or the movement of the video is increased and the sound is reproduced at the same time. Since the pitch is higher,
Viewers feel discomfort. On the other hand, the method of re-editing the edited video increases the burden on the operator and takes time.

[0004] Therefore, an object of the present invention is to provide an easy and short time without causing a viewer to feel discomfort.
It is an object of the present invention to provide a playback time extension method capable of extending or reducing the playback time of a digitized video.

[0005]

Means for Solving the Problems and Effects of the Invention The first invention is a method for extending the reproduction time of a digitized video, wherein the video of the frame is used for all the frames constituting the video. Measuring the video change rate indicating how much the video has changed compared to the video of the previous and next frames, recording the video, and determining the video based on the playback time before and after the video is expanded. Calculating the number of operation frames indicating the number of frames to be operated out of all the frames constituting
The method includes the steps of selecting a number of frames equal to the number of operation frames, in the order of small video change rate, and transmitting the recorded video from all the frames constituting the video, and transmitting the video. For each frame, a frame operation is performed such that transmission of the video of the frame is repeated a plurality of times.

As described above, in the first invention, the reproduction time of a video is extended by transmitting a frame with a small video change rate a plurality of times, so that it is easier and longer than in the case of editing to extend the reproduction time. The reproduction time can be extended in a short time. Further, compared to the case where the reproduction time is extended by changing the reproduction speed, the movement of the video is not slowed down, so that the sense of incongruity felt by the viewer can be reduced.

According to a second aspect, in the first aspect, the image is accompanied by digitized audio, and the method further comprises the step of measuring an audio level for all frames constituting the image. In the step of selecting a frame, a frame whose audio level is lower than a predetermined value is preferentially selected.

As described above, in the second invention, the video reproduction time is extended by transmitting a frame having a low video change rate and a low audio level a plurality of times. Compared with this, the reproduction time can be extended easily and in a short time. Also, compared to the case where the reproduction time is extended by changing the reproduction speed, the movement of the video is slowed down and the pitch of the audio is not lowered, so that the sense of discomfort felt by the viewer can be reduced.

A third aspect of the present invention is based on the first aspect, further comprising a step of dividing all frames constituting the video into a plurality of blocks, wherein the step of selecting a frame includes the step of selecting a certain block among the plurality of blocks. When a frame is selected from, the next frame is selected for blocks other than the one block.

As described above, in the third aspect, since the operation target frames are scattered over a wide range, it is possible to prevent the operation target frames from concentrating on a specific position of the video and causing the viewer to feel uncomfortable.

In a fourth aspect based on the first aspect, the method further comprises the step of dividing all frames constituting the video into a plurality of blocks, and the step of selecting a frame includes the step of selecting a certain block among the plurality of blocks. When a frame is selected from, the next frame is selected for blocks other than the one block and its adjacent block.

As described above, in the fourth aspect, since the operation target frames are scattered over a wider range, it is possible to prevent the operation target frames from concentrating on a specific position of the video and causing the viewer to feel uncomfortable. .

[0013] In a fifth aspect based on the first aspect, the method further comprises the step of dividing all frames constituting the video into a plurality of blocks. In the step of selecting a frame, a frame is evenly extracted from the plurality of blocks. It is characterized by being elected.

As described above, in the fifth aspect, the operation target frames are scattered evenly throughout the entirety, so that it is possible to prevent the operation target frames from concentrating on a specific position of the video and causing the viewer to feel uncomfortable. .

A sixth aspect of the present invention is a method for shortening the reproduction time of a digitized video. For all the frames constituting the video, how much the video of the frame is compared with the video of the previous and subsequent frames. Measuring the video change rate indicating whether the video has changed, recording the video, based on the playback time before the video is shortened and the playback time after the video is shortened. Calculating the number of operation frames indicating the number of target frames, selecting all the frames constituting the video, and selecting the number of frames equal to the number of operation frames, in ascending order of the video change rate, and And transmitting the video. In the transmitting the video, for each selected frame, the video of the frame is transmitted. It is characterized by performing frame operation as no.

As described above, in the sixth aspect of the present invention, the reproduction time of a video is reduced by exposing a frame having a small video change rate, so that it is easier and shorter than in the case where the reproduction time is reduced by editing. The playback time can be reduced in time. Further, compared to the case where the reproduction time is shortened by changing the reproduction speed, the movement of the video does not become faster, so that the sense of incongruity felt by the viewer can be reduced.

According to a seventh aspect based on the sixth aspect, the image further includes a step of measuring an audio level for all frames constituting the image, wherein the image is accompanied by digitized audio. In the step of selecting a frame, a frame whose audio level is lower than a predetermined value is preferentially selected.

As described above, in the seventh aspect of the present invention, the video reproduction time is shortened by exposing a frame having a low video change rate and a low audio level, so that the reproduction time is shortened by editing. Thus, the reproduction time can be reduced easily and in a short time. Further, compared with the case where the reproduction time is shortened by changing the reproduction speed, the movement of the video becomes faster and the pitch of the sound does not become higher, so that the sense of discomfort given to the viewer can be reduced.

In an eighth aspect based on the sixth aspect, the method further comprises the step of dividing all frames constituting the video into a plurality of blocks, and the step of selecting a frame includes the step of selecting a certain block among the plurality of blocks. When a frame is selected from, the next frame is selected for blocks other than the one block.

As described above, in the eighth aspect, since the operation target frames are scattered over a wide range, it is possible to prevent the operation target frames from being concentrated on a specific position of the video and causing the viewer to feel uncomfortable.

According to a ninth aspect, in the sixth aspect, the method further comprises the step of dividing all frames constituting the video into a plurality of blocks, and the step of selecting a frame includes the step of selecting a certain block among the plurality of blocks. When a frame is selected from, the next frame is selected for blocks other than the one block and its adjacent block.

As described above, in the ninth invention, the operation target frames are scattered over a wider area, so that it is possible to prevent the operation target frames from concentrating on a specific position of the video and causing the viewer to feel uncomfortable. .

In a tenth aspect based on the sixth aspect, the method further comprises the step of dividing all the frames constituting the video into a plurality of blocks, and in the step of selecting a frame, the step of equally selecting a frame from the plurality of blocks. It is characterized by being elected.

As described above, in the tenth aspect, the operation target frames are scattered evenly throughout the whole, so that it is possible to prevent the operation target frames from concentrating on a specific position of the video and causing the viewer to feel uncomfortable. .

An eleventh invention is an apparatus for extending the playback time of a digitized video, wherein the video of the frame is compared with the video of the previous and subsequent frames for all frames constituting the video. Image change rate measuring means for measuring the image change rate indicating how much change has been made,
Recording means for recording the video, the number of operation frames indicating the number of frames to be operated out of all the frames constituting the video based on the playback time before the video is expanded and the playback time after the expansion From all the frames that make up the video, in ascending order of video change rate,
Frame selecting means for selecting the number of frames equal to the number of operation frames, and transmitting means for transmitting the video recorded in the recording means, wherein the transmitting means, when transmitting the video, each frame selected by the frame selecting means Is characterized in that a frame operation is performed such that the transmission of the video of the frame is repeated a plurality of times.

As described above, in the eleventh invention, the video reproduction time is extended by transmitting a frame having a small video change rate a plurality of times, so that the reproduction time is extended more easily and easily than by extending the reproduction time by editing. The reproduction time can be extended in a short time. Further, compared to the case where the reproduction time is extended by changing the reproduction speed, the movement of the video is not slowed down, so that the sense of incongruity felt by the viewer can be reduced.

According to a twelfth aspect, in the eleventh aspect,
The video is accompanied by digitized audio, and the video further includes audio level measuring means for measuring the audio levels of all the frames constituting the video. The frame selecting means, when selecting a frame, It is characterized in that a frame whose level is lower than a predetermined value is preferentially selected.

As described above, in the twelfth aspect, the video reproduction time is extended by transmitting a frame having a low video change rate and a low audio level a plurality of times.
The reproduction time can be extended easily and in a short time as compared with the case where the reproduction time is extended by editing. Also,
Compared with the case where the reproduction time is extended by changing the reproduction speed, the movement of the video is slowed down and the pitch of the audio is not lowered, so that the sense of discomfort felt by the viewer can be reduced.

According to a thirteenth aspect, in the eleventh aspect,
The apparatus further includes means for dividing all frames constituting the video into a plurality of blocks. When a frame is selected from a certain block among the plurality of blocks, the next frame is selected by the one frame. It is characterized in that it is performed for blocks other than blocks.

As described above, in the thirteenth aspect, since the operation target frames are scattered over a wide range, it is possible to prevent the operation target frames from concentrating on a specific position of the video and causing the viewer to feel uncomfortable.

According to a fourteenth aspect, in the eleventh aspect,
The apparatus further includes means for dividing all frames constituting the video into a plurality of blocks. When a frame is selected from a certain block among the plurality of blocks, the next frame is selected by the one frame. It is characterized in that the process is performed on blocks other than blocks and blocks adjacent thereto.

As described above, in the fourteenth aspect, since the operation target frames are scattered over a wider range, it is possible to prevent the operation target frames from being concentrated on a specific position of the video and causing the viewer to feel uncomfortable. .

According to a fifteenth aspect, in the eleventh aspect,
The apparatus further includes means for dividing all frames constituting the video into a plurality of blocks, and wherein the frame selecting means selects a frame evenly from the plurality of blocks.

As described above, in the fifteenth aspect, the operation target frames are scattered evenly throughout the entirety, so that it is possible to prevent the operation target frames from concentrating on a specific position of the video and causing the viewer to feel uncomfortable. .

A sixteenth aspect of the present invention is an apparatus for shortening the reproduction time of a digitized video, in which, for all frames constituting the video, the video of the frame is compared with the video of the previous and subsequent frames. Image change rate measuring means for measuring the image change rate indicating how much change has been made,
Recording means for recording a video, the number of operation frames indicating the number of frames to be operated out of all frames constituting the video based on the playback time before and after the video is shortened From all the frames that make up the video, in ascending order of video change rate,
Frame transmitting means for selecting a number of frames equal to the number of operation frames, and transmitting means for transmitting the video recorded in the recording means, the transmitting means, when transmitting the video, for each selected frame, It is characterized in that a frame operation is performed so as not to transmit the video of the frame.

As described above, in the sixteenth aspect, the video reproduction time is reduced by exposing a frame having a small video change rate, so that it is easier and shorter than in the case where the reproduction time is reduced by editing. The playback time can be reduced in time. Further, compared to the case where the reproduction time is shortened by changing the reproduction speed, the movement of the video does not become faster, so that the sense of incongruity felt by the viewer can be reduced.

According to a seventeenth aspect, in the sixteenth aspect,
The video is accompanied by digitized audio, and the video further includes audio level measuring means for measuring the audio levels of all the frames constituting the video. The frame selecting means, when selecting a frame, It is characterized in that a frame whose level is lower than a predetermined value is preferentially selected.

As described above, in the seventeenth aspect, since the video reproduction time is reduced by exposing frames having a low video change rate and a low audio level, the reproduction time is shortened by editing. Thus, the reproduction time can be reduced easily and in a short time. Further, compared with the case where the reproduction time is shortened by changing the reproduction speed, the movement of the video becomes faster and the pitch of the sound does not become higher, so that the sense of discomfort given to the viewer can be reduced.

According to an eighteenth aspect, in the sixteenth aspect,
The apparatus further includes means for dividing all frames constituting the video into a plurality of blocks. When a frame is selected from a certain block among the plurality of blocks, the next frame is selected by the one frame. It is characterized in that it is performed for blocks other than blocks.

As described above, in the eighteenth aspect, since the operation target frames are scattered over a wide range, it is possible to prevent the operation target frames from being concentrated on a specific position of the video and causing the viewer to feel uncomfortable.

According to a nineteenth aspect, in the sixteenth aspect,
The apparatus further includes means for dividing all frames constituting the video into a plurality of blocks. When a frame is selected from a certain block among the plurality of blocks, the next frame is selected by the one frame. It is characterized in that the process is performed on blocks other than blocks and blocks adjacent thereto.

As described above, in the nineteenth aspect, since the operation target frames are scattered over a wider range, it is possible to prevent the operation target frames from being concentrated on a specific position of the video and causing the viewer to feel uncomfortable. .

According to a twentieth aspect, in the sixteenth aspect,
The apparatus further includes means for dividing all frames constituting the video into a plurality of blocks, and wherein the frame selecting means selects a frame evenly from the plurality of blocks.

As described above, in the twentieth aspect, the operation target frames are scattered evenly throughout the entirety, so that it is possible to prevent the operation target frames from concentrating on a specific position of the video and causing the viewer to feel uncomfortable. .

A twenty-first invention is a recording medium storing a program to be executed in a computer device for extending the reproduction time of a digitized video, wherein all the frames constituting the video are stored in the frame. Measuring the video change rate indicating how much the video has changed compared to the video of the previous and subsequent frames, recording the video, based on the playback time before and after the video has been expanded Calculating the number of operation frames indicating the number of frames to be operated out of all the frames constituting the video, from all the frames constituting the video to the number of operation frames in ascending order of the video change rate Selecting the equal number of frames, and transmitting the recorded video, and transmitting the video. Records, for each selected frame, a program for realizing, on a computer device, an operating environment characterized by performing a frame operation such that transmission of an image of the frame is repeatedly performed a plurality of times. ing.

According to a twenty-second invention, in the twenty-first invention,
The video is accompanied by digitized audio, and further includes a step of further measuring the audio level for all frames constituting the video, and in the step of selecting a frame, the audio level is predetermined. A program for realizing, on a computer device, an operating environment characterized in that a frame lower than the value is preferentially selected is recorded.

According to a twenty-third aspect, in the twenty-first aspect,
The method further comprises the step of dividing all frames constituting the video into a plurality of blocks, and in the step of selecting a frame, when a frame is selected from a certain block among the plurality of blocks, the next frame is selected. A program for realizing, on a computer device, an operating environment characterized by performing operations on blocks other than the one block is recorded.

According to a twenty-fourth aspect, in the twenty-first aspect,
The method further comprises the step of dividing all frames constituting the video into a plurality of blocks, and in the step of selecting a frame, when a frame is selected from a certain block among the plurality of blocks, the next frame is selected. A program for realizing, on a computer device, an operating environment characterized by performing on one block and blocks other than its adjacent blocks is recorded.

According to a twenty-fifth aspect, in the twenty-first aspect,
The method further comprises a step of dividing all frames constituting the video into a plurality of blocks, and in the step of selecting a frame, an operating environment characterized in that frames are equally selected from the plurality of blocks. It records the program to realize it.

A twenty-sixth invention is a recording medium for recording a program to be executed in a computer device for shortening the reproduction time of a digitized video, wherein all the frames constituting the video are stored in the frame. Measuring the video change rate indicating how much the video has changed compared to the video of the previous and subsequent frames, recording the video, and based on the playback time before and after the video is shortened. Calculating the number of operation frames indicating the number of frames to be operated out of all the frames constituting the video, from all the frames constituting the video to the number of operation frames in ascending order of the video change rate Selecting the equal number of frames, and transmitting the recorded video, and transmitting the video. , For each frame that is selected, an operating environment for performing the frame operation that does not perform the transmission of the video of the frame, and records a program for realizing on a computer device.

According to a twenty-seventh aspect, in the twenty-sixth aspect,
The video is accompanied by digitized audio, and further includes a step of measuring an audio level for all frames constituting the video. In the step of selecting a frame, the audio level is set to a predetermined value. A program for realizing, on a computer device, an operating environment characterized in that a lower frame is preferentially selected is recorded.

According to a twenty-eighth aspect, in the twenty-sixth aspect,
The method further comprises the step of dividing all frames constituting the video into a plurality of blocks, and in the step of selecting a frame, when a frame is selected from a certain block among the plurality of blocks, the next frame is selected. A program for realizing, on a computer device, an operating environment characterized by performing operations on blocks other than the one block is recorded.

According to a twenty-ninth aspect, in the twenty-sixth aspect,
The method further comprises the step of dividing all frames constituting the video into a plurality of blocks, and in the step of selecting a frame, when a frame is selected from a certain block among the plurality of blocks, the next frame is selected. A program for realizing, on a computer device, an operating environment characterized by performing on one block and blocks other than its adjacent blocks is recorded.

According to a thirtieth aspect, in the twenty-sixth aspect,
The method further comprises a step of dividing all frames constituting the video into a plurality of blocks, and in the step of selecting a frame, an operating environment characterized in that frames are equally selected from the plurality of blocks. It records the program to realize it.

A thirty-first aspect of the present invention is a method for extending or shortening the reproduction time of a digitized video, wherein, for all frames constituting the video, the video of the frame is compared with the video of the preceding and following frames. Measuring the video change rate indicating how much change has occurred, recording the video, and for all the frames that make up the video, the operation sequence number indicating the order in which the frame operation is to be performed is defined as the video change rate. Relatedly determining step, creating a table describing the operation sequence number, based on the playback time before and after the expansion and contraction of the video, based on the playback time before and after the Calculating the number of operation frames indicating the number of frames to be formed, and referring to the table to obtain all the frames constituting the video Selecting a number of frames equal to the number of operation frames, and transmitting the recorded video, in ascending order of the video change rate. In the transmitting the video, the selected frame has a playback time of When decompressing is performed, a frame operation is performed such that the transmission of the video of the frame is repeatedly performed a plurality of times. When the playback time is reduced, a frame operation is performed such that the transmission of the video of the frame is not performed. And

As described above, in the thirty-first aspect, the video reproduction time is extended by transmitting a frame with a small video change rate a plurality of times, and the frame with a small video change rate is not transmitted. Since the playback time of the video is reduced, the playback time can be expanded and contracted easily and in a shorter time than in the case where the playback time is expanded and reduced by editing. Also, compared to the case where the playback time is expanded or contracted by changing the playback speed, the movement of the video does not become slower or faster, so that the sense of discomfort felt by the viewer can be reduced. Furthermore, since a table describing the operation sequence number is created and an operation frame is selected with reference to the table, once the table is created, the reproduction time can be easily and arbitrarily extended thereafter.

[0057]

Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) FIG. 1 is a block diagram showing a functional configuration of a reproduction time expansion / contraction device according to a first embodiment of the present invention. In FIG. 1, the reproduction time expansion / contraction device 10 includes a video change rate measurement storage unit 101, an audio level measurement storage unit
2. It has a video / audio recording unit 103, a control unit 104, and a video / audio transmission unit 105.

The image change rate measurement and accumulation section 101 measures the image change rate (described later) between the input and output frames and the frames before and after the frame, and stores the measurement result in a video / audio attribute table (described later). To accumulate. The audio level measurement storage unit 102 measures the audio level of the input audio for each frame, and stores the measurement result in the video / audio attribute table. The video / audio recording unit 103 records the input video and audio. The control unit 104 includes a video change rate measurement storage unit 101 and an audio level measurement storage unit 102
Operation sequence number for each frame according to the measurement result (described later)
And writes the assigned number to the video / audio attribute table. The video / audio transmitting unit 105 transmits the video / audio with reference to the video / audio attribute table, and thereby expands / contracts (extends / reduces) the video / audio reproduction time to the specified reproduction time.

Each of the above components is, for example, a CPU.
It can be realized using a computer device (not shown) provided with a memory and a disk. In that case, the CPU performs processing to extend or shorten the video playback time according to the software program stored in the memory / disk. The above software program is stored on a floppy disk or C
It is supplied to a computer device via a recording medium such as a D-ROM or through a communication line.

The video of a movie or a program edited using, for example, a non-linear editing machine (not shown) and audio accompanying the video are input to the reproduction time expansion / contraction device 10 configured as described above. It should be noted that the video and audio are digital data that can be processed (recorded in units of frames) and recorded by a computer device. The playback time expansion / contraction device 10 performs predetermined processing on the input video / audio and outputs the processed video / audio, so that the playback time of the video / audio can be visually or audibly discomforted by the viewer. Stretch so that it does not. In the following, the reproduction time stretching device 10
Will be described in detail.

When the reproduction time expansion / contraction device 10 is activated and video / audio to be expanded / contracted is input, the video / audio is transmitted through the video change rate measurement storage unit 101 and the audio level measurement storage unit 102 to the video / audio. The audio is recorded once by the audio recording unit 103. At this time, the video change rate measurement and accumulation unit 101 measures the video change rate between each frame of the video and the frames before and after the frame, and compares the measurement result with the video / video.
A process for storing in the voice attribute table is performed. Note that the video change rate between a certain frame and the previous and next frames is an amount indicating how much the video of the frame has changed compared to the video of the previous and next frames. The audio level measurement and accumulation unit 102 performs a process of measuring the audio level of each frame and storing the measurement result in the video / audio attribute table.

FIG. 2 shows an image / video for storing the measurement result by the video change rate measurement / storage unit 101 and the audio level measurement / storage unit 102, and the control unit 104 to write the operation sequence number.
4 shows a voice attribute table. Here, it is assumed that the video change rate measurement storage unit 101, the audio level measurement storage unit 102, and the control unit 104 individually have the same video / audio attribute table as in FIG. In FIG.
In the video / audio attribute table, for each frame, the video change rate, whether or not there is no voice (here, the voice level is not written as it is, but if it is lower than a predetermined level, it is written as no voice), the operation sequence number In addition, a plurality of columns are provided for writing whether or not to be operated. Also, “stretching” indicates whether the playback time is extended or shortened, “stretching rate” indicating the ratio of the playback time after stretching to the standard playback time (playback time before stretching), and Three items of “number of operation frames” indicating the number are further provided.

FIG. 3 shows the image change rate measuring and storing section 10 shown in FIG.
1 is a flowchart showing the process of FIG. 1, and FIG. 4 is a flowchart showing the process of the audio level measurement storage section 102 of FIG. First, the processing operation of the video change rate measurement storage unit 101
This will be described with reference to the flowchart of FIG. Step S3
In 01, the presence or absence of a received frame is determined for the video. Then, if the judgment result is affirmative, the processing after step S302 is executed for the frame, and if the reception of all the frames is completed and the judgment result is negative, the processing ends.

The image change rate measuring and accumulating section 101 first measures the image change rate between the received frame and the previous frame (step S302), and then measures the measurement result, that is, between the received frame and the previous frame. The image change rate is temporarily stored (step S303). Then, the temporarily stored video change rate between the previous frame and the immediately preceding frame and the video change rate between the previous frame and the received frame are summed, and the obtained value is used as the video change rate of the previous frame. The image in Figure 2
Substitute in the "video change rate" column of the audio attribute table (step S304). Then, the video change rate measurement storage unit 101
Stores the video data of the received frame in the video / audio recording unit 10
3 (step S305), and then returns to step S301.

Here, an example of a method of measuring the video change rate will be described. FIG. 5 is a diagram showing one frame of a video input to the reproduction time expansion / contraction device 10 of FIG. FIG.
A single frame 50 is composed of a plurality of pixels 501. In a display (not shown), each pixel 501 is sequentially scanned in a horizontal direction from an upper side to a lower side by an electron beam. The video is displayed on the screen. During such scanning, a certain pixel 5
01 and the next pixel 501 at the boundary between video signals (eg, RG
When the value of the B signal changes, the boundary portion is called a change point.
2a to 502d exist. Change point 502a
And 502c, the video signal changes from white to black,
At the change points 502b and 502d, the video signal changes from black to white.

For each frame 50 of the input video, the positions of the above-mentioned change points and the details of the change are listed, and for example, a certain frame 50 (this is referred to as a frame 50 a) When calculating the video change rate between 50 (this is referred to as frame 50b),
The change point list of the frame 50a (not shown) is compared with the change point list of the frame 50b. And frame 5
Of the change points of 0a, change points having different positions or contents from those of the frame 50b are counted, and the obtained number is defined as a video change rate.

Next, the processing operation of the audio level measurement storage section 102 will be described with reference to the flowchart of FIG. In step S401, the presence or absence of a received frame is determined for voice. If the determination result is affirmative, the processing from step S402 is performed on the frame. If the reception of all frames is completed and the determination result is negative, the processing ends.

The sound level measuring and storing section 102 first measures the sound level of the received frame (step S).
402) Next, it is determined whether or not the frame is a silent frame based on the obtained measurement value (step S40).
3). The determination as to whether or not the frame is a non-voice frame is performed as follows, for example. That is, a predetermined threshold is determined,
The measured value obtained in step S402 is compared with the threshold value. And if the measurement is less than the threshold,
The frame is determined to be a voiceless frame, and if the measured value is equal to or greater than the threshold value, the frame is determined to be a voiced frame.

Next, the audio level measurement / storage section 102 assigns a symbol (●) indicating that there is no audio to the video / video of FIG.
Substitute into the "silent" column of the voice attribute table (step S404). It should be noted that a frame determined to have voice is left blank. Then, the audio level measurement storage unit 1
In step 02, the audio data of the received frame is recorded in the video / audio recording unit 103 (step S405), and thereafter, the process returns to step S401.

With the above, recording of the input video and audio,
The process of measuring and storing the video change rate and the audio level for each frame is completed. Next, an operation sequence number is assigned to each frame based on the stored video change rate and audio level, and a process of selecting a frame to be operated based on those numbers is performed. FIG. 6 is a flowchart showing a process (operation frame selection control process) of the control unit 104 in FIG. 6, the control unit 104 first assigns an operation sequence number to each frame, and substitutes the assigned number into the “operation sequence number” column of the video / audio attribute table in FIG. 2 (step S601).

The assignment of operation sequence numbers is performed, for example, as follows. First, numbers are assigned to non-voice frames in ascending order of the video change rate. Then, when the numbers have been assigned to all the unvoiced frames, the numbers (serial numbers following the unvoiced frames) are sequentially added to the voiced frames in ascending order of the video change rate.

In addition, when assigning the operation sequence numbers as described above, the generation of an unpleasant clicking sound is effectively prevented, and the processing is simple, so that the processing time is shortened and the CPU resources are saved. Also. However, no matter how large the video change rate of a certain frame is, if there is no sound, a young number is assigned to the frame, so that the viewer may feel a sense of visual discomfort. Therefore, another allocation method as described below may be adopted. For example, first, provisional numbers are assigned to all frames in ascending order of the video change rate, and then the provisional numbers are replaced so that the priority of the non-voice frames is increased to some extent.

Referring again to FIG. 6, after that, the reproduction time after expansion and contraction is input to the reproduction time expansion and contraction device 10. The control unit 104 recognizes the standard playback time of the video / audio (playback time before expansion / contraction), and compares the standard playback time with the playback time after expansion / contraction (step S602). Then, as a result of the comparison, if the playback time after expansion / contraction is shorter than the standard playback time, “
(Step S603). On the other hand, if the playback time after expansion / contraction is longer than the standard playback time,
"Expansion" is substituted for the "expansion" item of the voice attribute table (step S604).

Next, the control unit 104 obtains the expansion / contraction ratio from the standard reproduction time and the reproduction time after expansion / contraction, and substitutes it into the “expansion / contraction ratio” item of the video / audio attribute table in FIG.
605). Then, the number of frames to be operated is calculated from the obtained expansion / contraction ratio, and is substituted for the “number of operation frames” item in the video / audio attribute table of FIG. 2 (step S60).
6). Further, in order from the frame with the smallest operation sequence number given in step S601, the number of frames equal to the number of operation frames calculated in step S606 is selected as the operation target frame, and the selected frame is selected as the video / video in FIG. A symbol (○) indicating that the frame is an operation target frame is substituted into the “operation target” column of the voice attribute table (step S607).

Thus, the operation frame selection control processing ends. Next, a process of transmitting the video / audio once recorded in the video / audio recording unit 103 is performed. At this time, the video / audio transmitting unit 105 operates each frame selected as an operation target to transmit video / audio, thereby extending or shortening the reproduction time.

FIG. 7 is a flowchart showing the processing of the video / audio transmitting section 105 of FIG. In FIG. 7, the video / audio transmitting unit 105 performs a process of reading and transmitting the video / audio recorded in the video / audio recording unit 103 in order from the first frame, and at this time, first, the video / audio of FIG. Referring to the voice attribute table, it is determined whether “shortened” or “extended” is assigned to the “expansion” item (step S701). And as a result of judgment, "shortening"
Is substituted, the processing of steps S702 to S705 is executed, and if "decompression" is substituted, the processing of steps S706 to S711 is executed.

When “shortening” is assigned to the “expansion” item, the video / audio transmitting unit 105 refers to the video / audio attribute table in FIG. Whether "○" is substituted in the column, that is, the frame to be transmitted (transmission frame)
Is a frame to be operated (step S702). As a result of the determination, when the transmission frame is not the operation target frame, the video / audio of the frame is read out from the video / audio recording unit 103 and transmitted (step S70).
3) On the other hand, when the transmission frame is the operation target frame, the process of reading and transmitting the video and audio of the frame is omitted. Then, the above-described processing is repeated until the transmission of the video / audio recorded in the video / audio recording unit 103 is completed (steps S704 and S705).

When “expansion” is assigned to the “expansion” item, the video / audio transmission unit 105 refers to the video / audio attribute table in FIG. 2 to determine the frame (transmission frame) to be transmitted. It is determined whether “O” is substituted in the “operation target” column, that is, whether the transmission frame is the operation target frame (step S706). As a result of the determination, when the transmission frame is the operation target frame, the video / audio of the frame is successively read out from the video / audio recording unit 103 and transmitted twice (step S70).
7 and S708), if the transmission frame is not the operation target frame, the video / audio of the frame is read out and transmitted only once from the video / audio recording unit 103 (step S709). Then, the video / audio recording unit 10
The above processing is repeated until the transmission of the video / audio recorded in No. 3 is completed (steps S710 and S711).

In other words, when shortening the reproduction time, the video / audio transmitting unit 105 removes the frame to be operated, that is, the frame having no audio and a small video change rate, when transmitting the video / audio ( In other words, the transmission is performed while skipping a frame having no sound and a small video change rate). On the other hand, when extending the reproduction time, the video / audio transmission unit 105 transmits the operation target frame, that is, a frame without sound and a small video change rate twice (one time for each of the other frames). . Thus, the process of transmitting video and audio is completed.

As described above, according to the present embodiment, the reproduction time of a video is extended by transmitting a frame with a small video change rate and a low audio level twice, and a frame with a small video change rate is exposed. By doing so, the playback time of the video is shortened, so that the playback time can be expanded and contracted more easily and in a shorter time than in the case where the playback time is expanded and reduced by editing. Also, compared to the case where the playback time is expanded or contracted by changing the playback speed, the video movement is not slowed down and the sound pitch is lowered, or the video movement is fastened and the sound pitch is not increased. Therefore, the sense of incongruity that the viewer feels can be reduced.

In the present embodiment, a frame having a small video change rate and a low audio level is selected and operated as a frame to be operated. However, at least a frame having a small video change rate is selected and the same operation is performed. As compared with the case where the reproduction time is expanded and shortened by editing, the effect that the reproduction time can be expanded and contracted easily and in a short time is obtained. In addition, compared to the case where the playback time is expanded or contracted by changing the playback speed, the motion of the video is not slowed down or accelerated, so that an effect that the sense of discomfort given to the viewer can be reduced can be obtained. .

Further, in the present embodiment, when the reproduction time is extended, the frame selected as the operation target is transmitted twice, but may be transmitted plural times. Further, the number of transmissions may be changed according to, for example, the video change rate.

In the first embodiment, the operation target frame may be concentrated at a specific position in the video. In such a case, the viewer may feel uncomfortable. Therefore, the second to fourth embodiments disclose a playback time expansion / contraction device that can prevent an operation target frame from being concentrated at a specific position in a video.

(Second Embodiment) The functional configuration of the playback time expansion and contraction device according to the second embodiment of the present invention is the same as that of the playback time expansion and contraction device according to the first embodiment. Invite. 1 performs the same operation as that of the first embodiment except for the following two differences.

The first difference is a video / audio attribute table. FIG. 8 is a video / audio attribute table in which the video change rate measurement storage unit 101 and the audio level measurement storage unit 102 of the playback time expansion / contraction device of FIG. 1 store the measurement results, and the control unit 104 writes the operation sequence number. Is shown. The difference between the table shown in FIG. 8 and the table shown in FIG. 2 is that a plurality of frames constituting the video are divided into α blocks (α is an arbitrary integer of 2 or more).

The second difference is a process for selecting an operation frame. FIG. 9 is a flowchart showing a process (operation frame selection control process) of the control unit 104 in FIG. The processing shown in FIG. 9 is different from the processing shown in FIG.
Step S902 is provided in place of step S607, and step S901 is further provided before step S601.

In step S901, the control unit 104 performs a process of dividing a plurality of frames constituting a video into α blocks. As an example of division, when the total number of frames constituting a video is 300,
The frame is divided into 10 blocks each consisting of 30 frames. Note that, depending on the total number of frames and the number of blocks, the number of frames in each block may not be uniform. For example, when the total number of frames is 298 and the number of blocks is 10, the first to eighth blocks include 30 frames, and the ninth and tenth frames include 29 frames. Thus, the division is preferably
This is performed so that the number of frames included in each block is equal.

In step S902, the control unit 104
The same number of frames as the number of operation frames calculated in step S606 are selected as operation target frames so that selection is not performed sequentially from the frame with the lowest operation sequence number assigned in step S601, but from the same block, For the selected frame, a symbol (○) indicating that the frame is an operation target is substituted in the “operation target” column of the video / audio attribute table of FIG.

That is, in FIG. 8, when selecting the frames in order from the frame having the smallest operation order number, two frames are continued from the α-th block, that is, the Y-th frame whose operation order number is “1” and the operation. The sequence number is "
The X-th frame which is 2 ″ is selected (first X-th frame).
In the embodiment described above, the selection is made in this way). However, after selecting the Y-th frame from the α-th block, the control unit 104 next selects a frame from blocks other than the α-th block.

That is, the control unit 104 first selects a frame having the smallest operation order number for all blocks. As a result, the Y-th frame whose operation sequence number is “1” is selected from the α-th block. Next, a frame having the smallest operation order number is selected for blocks other than the α-th block. As a result, the X-th frame of the α-th block is skipped without being selected, and the third frame whose operation sequence number is “3” is selected from the first block. Next, a frame having the smallest operation order number is selected for blocks other than the first block. As a result, the X-th frame whose operation sequence number is “2” is selected from the α-th block. Thereafter, the control unit 104 repeats the same selection processing as described above.

In the above example, the frame skipped without being selected (the Xth frame in this case) may be excluded from the target at the time of the next selection. In that case, next to the third frame is not the Xth frame,
A frame (not shown) whose operation sequence number is “4” is selected.

Processing other than the above, for example, video change rate measurement and accumulation processing, audio level measurement and accumulation processing, video / audio transmission processing (see FIGS. 3 to 5 and 7), and the like are the same as those in the first embodiment. Therefore, the description is omitted.

As described above, according to the present embodiment, it is possible to prevent the operation target frame from concentrating on a specific position of the video and causing the viewer to feel uncomfortable.

(Third Embodiment) The functional configuration of the reproduction time expansion / contraction device according to the third embodiment of the present invention is the same as that of the reproduction time expansion / contraction device according to the first embodiment. Invite. 1 performs the same operation as that of the first embodiment except for the following two differences.

The first difference is a video / audio attribute table. In the present embodiment, the image change rate measurement accumulation unit 10
The video / audio attribute table for storing the measurement results by the 1 and audio level measurement / storage unit 102 and the control unit 104 to write the operation sequence number is the same as that of the second embodiment. I do.

The second difference is a process for selecting an operation frame. FIG. 10 is a flowchart showing a process (operation frame selection control process) of the control unit 104 in FIG.
The processing shown in FIG. 10 is different from the processing shown in FIG. 6 in that step S1001 is provided instead of step S607, and step S901 is further provided before step S601.

Step S901 corresponds to step S9 in FIG.
This is the same processing as 01. That is, step S901
Then, the control unit 104 performs a process of dividing a plurality of frames constituting the video into α blocks (see the second embodiment).

Step S1001 is the same as step S902 in FIG. 9 except that selection of not only the same block but also adjacent blocks is not performed continuously when selecting an operation frame. Step S90
In No. 2, when an operation frame is selected, selection is not performed continuously from the same block (see the second embodiment).

That is, in step S1001, the control unit 104 calculates in step S606 such that selection is not performed in order from the frame with the smallest operation order number given in step S601, but continuously from the same or adjacent blocks. The number of frames equal to the number of operation frames is selected as an operation target frame, and the selected frame is indicated in the “operation target” column of the video / audio attribute table in FIG. Is assigned.

For example, in FIG. 8, if an operation frame is now selected from the α-th block, then the smallest operation sequence number is set for blocks other than the α-th block and the (α-1) -th block. Select the frame to have. Similarly, if an operation frame is selected from a third block (not shown), a frame having the smallest operation order number is selected next for blocks other than the second to fourth blocks.

As in the second embodiment, a frame skipped without being selected may be excluded from the target in the next selection.

Processes other than those described above, such as the video change rate measurement and accumulation process, the audio level measurement and accumulation process, and the video / audio transmission process (see FIGS. 3 to 5 and 7), are the same as in the first embodiment. Therefore, the description is omitted.

As described above, according to the present embodiment, it is possible to prevent the operation target frame from concentrating on a specific position of the video and causing the viewer to feel uncomfortable.

(Fourth Embodiment) The functional configuration of a reproduction time expansion / contraction device according to a fourth embodiment of the present invention is the same as that of the reproduction time expansion / contraction device according to the first embodiment. Invite. 1 performs the same operation as that of the first embodiment except for the following two differences.

The first difference is a video / audio attribute table. FIG. 11 shows a video / audio attribute table for the video change rate measurement storage unit 101 and the audio level measurement storage unit 102 to store the measurement results, and for the control unit 104 to write the operation sequence number. The table shown in FIG. 11 differs from the table shown in FIG. 2 in the following three points. The first is that a plurality of frames constituting a video are divided into α blocks (α is an arbitrary integer of 2 or more). Second, the number of operation frames per block is entered instead of the number of operation frames (of the entire video). Third, an operation sequence number in a block is written instead of the operation sequence number (for the entire video).

The second difference is a process for selecting an operation frame. FIG. 12 is a flowchart showing a process (operation frame selection control process) of the control unit 104 in FIG.
The processing shown in FIG. 12 is different from the processing shown in FIG. 6 in that step S1201 is replaced with step S1201,
Step S1202 is provided in place of step S606, and step S1203 is provided in place of step S607, and step S901 is provided before step S1201.
Is further provided.

Step S901 corresponds to step S9 in FIG.
This is the same processing as 01. That is, step S901
Then, the control unit 104 performs a process of dividing a plurality of frames constituting the video into α blocks (see the second embodiment). As an example of division, when the total number of frames constituting an image is 300, those 300 frames are divided into 10 blocks each including 30 frames.

Step S1201 of FIG. 6 is the same as step S601 of FIG. 6 except that an operation sequence number is assigned to each block.
This is the same processing as. In step S601, an operation sequence number is assigned to the entire image (that is, a serial number is assigned to all frames constituting the image;
).

That is, in step S1201, the control unit 104 first allocates an operation sequence number to a frame included in the first block, and then allocates an operation sequence number to a frame included in the second block. Thereafter, the same operation sequence number allocation processing is performed up to the α-th block. As a result, as in the above example, if the 300 frames constituting the video are divided into 10 blocks each including 30 frames, the 30 frames included in the first block include 1 to 30 as the operation sequence numbers. Will be allocated. Second
Similarly, any one of 1 to 30 is assigned as the operation sequence number for each of the 30 frames included in the α-th block.

Step S1202 is the same as step S606 in FIG. 6, except that the number of operation frames per block is calculated. Step S606
Then, the number of operation frames of the entire video was calculated (see the first embodiment). That is, in step S1202,
The control unit 104 calculates the number of operation frames per block from the expansion / contraction ratio obtained in step S605, and
Substituted in the item “number of operation frames per block” in the video / audio attribute table of No. 1.

The number of operation frames per block can be obtained by first obtaining the number of operation frames of the entire video and dividing the obtained number by the number of blocks. Note that the number of operation frames per block may not be uniform depending on the number of operation frames or blocks of the entire video. For example, when the number of operation frames of the entire video is 28 and the number of blocks is 10, in the first to eighth blocks, the number of operation frames per block is three, and the ninth and tenth blocks are operated.
The number of frames is two. Thus, the number of operation frames per block is preferably determined such that the number of operation frames in each block is equal.

Step S1203 of FIG. 6 is the same as step S607 of FIG. 6, except that an operation frame is selected for each block.
This is the same processing as. In step S607, an operation frame is selected from the entire video (see the first embodiment).

That is, in step S1203, the control unit 104 first performs the following processing on the first block. In order from the frame with the smallest operation sequence number given in step S1201, the number of frames equal to the number of operation frames per block calculated in step S1202 is selected as the operation target frame, and the selected frames are shown in FIG. A symbol (○) indicating that the frame is an operation target frame is substituted in the “operation target” column of the video / audio attribute table. Next, the same processing as described above is performed for the second block. Thereafter, the same processing as described above is performed up to the α-th block.

Processing other than the above, for example, video change rate measurement and accumulation processing, audio level measurement and accumulation processing, video / audio transmission processing (see FIGS. 3 to 5 and 7), and the like are the same as those in the first embodiment. Therefore, the description is omitted.

As described above, according to the present embodiment, it is possible to prevent the operation target frame from concentrating on a specific position of the video and causing the viewer to feel uncomfortable.

Here, when the second to fourth embodiments are compared with each other, the positions of the operation target frames are more widely scattered in the third embodiment than in the second embodiment.
Further, in the fourth embodiment, the positions of the operation target frames are scattered evenly throughout the video. Therefore, the discomfort felt by the viewer becomes lighter in the order of the second to fourth embodiments.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a functional configuration of a playback time expansion and contraction device according to a first embodiment of the present invention (second to fourth).
Is also incorporated in the embodiment).

FIG. 2 is a block diagram of a reproduction time expansion / contraction device (first embodiment) shown in FIG. 1 in which a video change rate measurement storage unit 101 and an audio level measurement storage unit 102 store measurement results, and a control unit 104 writes an operation sequence number. FIG. 6 is a diagram showing a video / audio attribute table for use.

FIG. 3 is a flowchart illustrating a process of an image change rate measurement accumulation unit 101 of FIG. 1;

FIG. 4 is a flowchart showing a process of a voice level measurement storage unit 102 in FIG. 1;

FIG. 5 is a view showing one frame of a video input to the reproduction time expansion / contraction device 10 of FIG. 1;

FIG. 6 is a flowchart showing processing (operation frame selection control processing) of a control unit 104 of the reproduction time expansion / contraction device 10 (first embodiment) of FIG.

FIG. 7 is a flowchart showing a process of a video / audio transmission unit 105 of the reproduction time expansion / contraction device 10 of FIG.

8 is a diagram showing an example of a reproduction time expansion device (second embodiment) shown in FIG. 1; a video change rate measurement storage unit 101 and an audio level measurement storage unit 102 store measurement results, and a control unit 104 writes an operation sequence number. FIG. 13 is a diagram showing a video / audio attribute table for the present invention (also used in the third embodiment).

FIG. 9 is a flowchart showing a process (operation frame selection control process) of a control unit 104 of the playback time expansion / contraction device 10 (second embodiment) of FIG.

FIG. 10 is a flowchart showing a process (operation frame selection control process) of a control unit 104 of the playback time expansion / contraction device 10 (third embodiment) of FIG.

FIG. 11 is a reproduction time expansion and contraction apparatus of FIG. 1 (fourth embodiment);
FIG. 7 is a diagram showing a video / audio attribute table in which a video change rate measurement storage unit 101 and an audio level measurement storage unit 102 store measurement results, and a control unit 104 writes an operation sequence number.

FIG. 12 is a flowchart showing a process (operation frame selection control process) of a control unit 104 of the playback time expansion / contraction device 10 (fourth embodiment) in FIG.

[Explanation of symbols]

 Reference Signs List 10 playback time expansion / contraction device 101 video change rate measurement storage unit 102 audio level measurement storage unit 103 video / audio recording unit 104 control unit 105 video / audio transmission unit

Claims (31)

[Claims] 1. A method for extending the playback time of a digitized video, comprising: for all frames constituting the video, how much the video of the frame changes compared to the video of the preceding and following frames. Measuring the video change rate indicating whether the video is recorded, the recording the video, and the operation target among all the frames constituting the video based on the playback time before the video is expanded and the playback time after the video is expanded. Calculating the number of operation frames indicating the number of frames to be, from all frames constituting the video, selecting the number of frames equal to the number of operation frames, in ascending order of the video change rate, and recording And transmitting the video. In the transmitting the video, for each of the selected frames, the And performing frame operations like are repeatedly performed a plurality of times the transmission of the video, playing time extension method. 2. The image is accompanied by digitized audio, and further comprising a step of measuring an audio level for all frames constituting the image, wherein the step of selecting a frame comprises: 2. The reproduction time extension method according to claim 1, wherein a frame whose audio level is lower than a predetermined value is preferentially selected. 3. The method according to claim 1, further comprising the step of dividing all frames constituting the video into a plurality of blocks, wherein the step of selecting a frame includes the steps of: 2. The selection of the next frame is performed for blocks other than the one block.
3. The reproduction time extension method according to 1. 4. The method according to claim 1, further comprising the step of dividing all the frames constituting the video into a plurality of blocks. In the step of selecting a frame, when a frame is selected from a certain block among the plurality of blocks, 2. The reproduction time extension method according to claim 1, wherein the selection of the next frame is performed on blocks other than the one block and its adjacent blocks. 5. The method according to claim 1, further comprising the step of dividing all the frames constituting the video into a plurality of blocks, wherein the step of selecting a frame includes selecting frames evenly from the plurality of blocks. The reproduction time extension method according to claim 1. 6. A method for shortening the reproduction time of a digitized video, comprising: for each frame constituting the video, how much the video of the frame changes compared to the video of the preceding and following frames. Measuring the video change rate indicating whether the video is recorded, the recording of the video, and the operation target among all the frames constituting the video, based on the reproduction time before and after the reproduction of the video. Calculating the number of operation frames indicating the number of frames to be, from all frames constituting the video, selecting the number of frames equal to the number of operation frames, in ascending order of the video change rate, and recording And transmitting the video. In the transmitting the video, for each of the selected frames, the And performing frame operation so as not to perform the delivery of video, playback time shorter way. 7. The video is accompanied by digitized audio, further comprising a step of measuring an audio level for all frames constituting the video, wherein the step of selecting a frame includes the step of: 7. The method according to claim 6, wherein a frame whose audio level is lower than a predetermined value is selected with priority. 8. The method according to claim 1, further comprising the step of dividing all frames constituting the video into a plurality of blocks, wherein the step of selecting a frame includes the steps of: 7. The selection of the next frame is performed for blocks other than the one block.
The playback time reduction method described in 1. 9. The method according to claim 9, further comprising the step of dividing all frames constituting the video into a plurality of blocks. In the step of selecting a frame, when a frame is selected from a certain block among the plurality of blocks, 7. The reproduction time reducing method according to claim 6, wherein the selection of the next frame is performed on blocks other than the one block and its adjacent blocks. 10. The method according to claim 10, further comprising the step of dividing all frames constituting the video into a plurality of blocks, wherein the step of selecting a frame includes selecting a frame evenly from the plurality of blocks. A method for shortening a reproduction time according to claim 6. 11. An apparatus for extending the playback time of a digitized video, wherein for each frame constituting the video, how much the video of the frame changes compared to the video of the previous and subsequent frames. A video change rate measuring means for measuring a video change rate indicating whether the video is recorded, a recording means for recording the video, and configuring the video based on a reproduction time before decompression and a reproduction time after decompression of the video. Calculating means for calculating the number of operation frames indicating the number of frames to be operated out of all the frames to be processed; the number of frames equal to the number of operation frames in ascending order of the video change rate from all the frames constituting the video Frame selecting means for selecting a frame, and transmitting means for transmitting the video recorded in the recording means, wherein the transmitting means transmits the video. When, for each frame the frame selection means is elected, and performs the frame operation as repeatedly performed more than once the delivery of video of the frame, the reproduction time expansion apparatus. 12. The video is accompanied by digitized audio, further comprising audio level measuring means for measuring audio levels for all frames constituting the video, wherein the frame selecting means comprises: When selecting the
12. The reproduction time extension device according to claim 11, wherein a frame whose audio level is lower than a predetermined value is selected with priority. 13. The apparatus according to claim 13, further comprising: a unit that divides all frames constituting the video into a plurality of blocks;
12. The reproduction time extension device according to claim 11, wherein when a frame is selected from a certain block, the next frame is selected for blocks other than the one block. 14. The image processing apparatus further comprising: means for dividing all frames constituting the video into a plurality of blocks, wherein the frame selecting means includes:
12. The reproduction time extending apparatus according to claim 11, wherein when a frame is selected from a certain block, the next frame is selected for a block excluding the one block and its adjacent blocks. 15. The apparatus according to claim 1, further comprising: a unit that divides all frames constituting the video into a plurality of blocks, wherein the frame selection unit selects a frame from the plurality of blocks evenly. 12. The reproduction time extension device according to item 11. 16. An apparatus for shortening a reproduction time of a digitized video, wherein for each frame constituting the video, how much the video of the frame changes compared to the video of the previous and subsequent frames. Video change rate measuring means for measuring a video change rate indicating whether the video is recorded, recording means for recording the video, the video is configured based on the playback time before shortening and the playback time after shortening Calculating means for calculating the number of operation frames indicating the number of frames to be operated out of all the frames to be processed; the number of frames equal to the number of operation frames in ascending order of the video change rate from all the frames constituting the video Frame selecting means for selecting a frame, and transmitting means for transmitting the video recorded in the recording means, wherein the transmitting means transmits the video. When, for each frame selected, and performs the frame operation that does not perform the transmission of the video of the frame,
Playback time reduction device. 17. The video image is accompanied by digitized audio, further comprising audio level measuring means for measuring audio levels for all frames constituting the video, wherein the frame selecting means comprises: When selecting the
17. The reproduction time reducing apparatus according to claim 16, wherein a frame whose audio level is lower than a predetermined value is selected with priority. 18. The apparatus according to claim 18, further comprising: means for dividing all frames constituting the video into a plurality of blocks;
17. The reproduction time reducing apparatus according to claim 16, wherein when a frame is selected from a certain block, the next frame is selected for blocks other than the one block. 19. The apparatus further comprising: means for dividing all frames constituting the video into a plurality of blocks, wherein the frame selecting means comprises:
17. The reproduction time shortening apparatus according to claim 16, wherein when a frame is selected from a certain block, the next frame is selected for blocks other than the one block and its adjacent block. 20. The image processing apparatus according to claim 20, further comprising: means for dividing all frames constituting the video into a plurality of blocks, wherein the frame selecting means selects a frame from the plurality of blocks evenly. 17. The reproduction time reducing device according to item 16. 21. A recording medium for recording a program to be executed in a computer device for extending a reproduction time of a digitized video, wherein a video of the frame is included in all frames constituting the video. Measuring a video change rate indicating how much has changed compared to the video of the previous and subsequent frames; recording the video; based on the playback time before the expansion of the video and the playback time after the expansion. Calculating the number of operation frames indicating the number of frames to be operated out of all frames constituting the video, from all the frames constituting the video, the operation frames are arranged in ascending order of the video change rate. Selecting the number of frames equal to the number, and transmitting the recorded video, In the transmitting step, for each of the selected frames, a frame operation for performing transmission of the video of the frame a plurality of times is performed. A recording medium on which a program is recorded. 22. The video is accompanied by digitized audio, and further comprising a step of further measuring an audio level for all frames constituting the video, wherein the step of selecting a frame comprises: 22. A program for realizing, on the computer device, an operating environment characterized by preferentially selecting a frame whose audio level is lower than a predetermined value.
A recording medium according to claim 1. 23. The method according to claim 23, further comprising the step of dividing all frames constituting the video into a plurality of blocks. In the step of selecting a frame, when a frame is selected from a certain block among the plurality of blocks, 22. The recording medium according to claim 21, wherein a program for realizing, on the computer device, an operating environment characterized in that selection of a next frame is performed on blocks other than the one block. 24. The method further comprises the step of dividing all frames constituting the video into a plurality of blocks, wherein the step of selecting a frame includes the steps of: 22. The program according to claim 21, wherein a program for realizing, on the computer device, an operating environment characterized in that selection of a next frame is performed on blocks other than the one block and its adjacent block. Recording medium. 25. An operation, further comprising a step of dividing all frames constituting the video into a plurality of blocks, wherein the step of selecting a frame includes selecting frames evenly from the plurality of blocks. 22. The recording medium according to claim 21, wherein a program for realizing an environment on said computer device is recorded. 26. A recording medium for recording a program to be executed in a computer device for shortening a reproduction time of a digitized video, wherein a video of the frame is used for all frames constituting the video. Measuring a video change rate indicating how much has changed compared to the video of the previous and subsequent frames; recording the video; based on the playback time before and after the shortening of the video. Calculating the number of operation frames indicating the number of frames to be operated out of all frames constituting the video, from all the frames constituting the video, the operation frames are arranged in ascending order of the video change rate. Selecting the number of frames equal to the number, and transmitting the recorded video, In the step of transmitting, for each frame selected, an operating environment for performing the frame operation that does not perform the transmission of the video of the frame, recording a program for realizing on said computer device, a recording medium. 27. The video has a digitized audio attached thereto, and further comprises a step of measuring an audio level with respect to all frames constituting the video, wherein the step of selecting a frame includes the step of: 27. A program for realizing, on the computer device, an operating environment characterized in that a frame whose audio level is lower than a predetermined value is preferentially selected.
A recording medium according to claim 1. 28. The method according to claim 28, further comprising the step of dividing all frames constituting the video into a plurality of blocks, wherein the step of selecting a frame includes the steps of: 27. The recording medium according to claim 26, wherein a program for realizing, on the computer device, an operating environment characterized in that a next frame is selected for blocks other than the one block, is recorded. 29. The method according to claim 29, further comprising a step of dividing all frames constituting the video into a plurality of blocks, wherein the step of selecting a frame includes the steps of: 27. The program according to claim 26, wherein a program for realizing, on the computer device, an operating environment characterized in that the selection of the next frame is performed on blocks other than the one block and its adjacent block. Recording medium. 30. The method according to claim 30, further comprising the step of dividing all frames constituting the video into a plurality of blocks, wherein the step of selecting a frame includes selecting frames equally from the plurality of blocks. The recording medium according to claim 26, wherein a program for realizing an environment on the computer device is recorded. 31. A method for extending or shortening the playback time of a digitized video, the method comprising: for all frames constituting the video, how much the video of the frame changes compared to the video of the previous and subsequent frames. Measuring the video change rate indicating whether or not, the step of recording the video, for all frames constituting the video, an operation sequence number indicating an order to be subjected to frame operation, the video change rate Deciding in relation to each other; creating a table describing the operation sequence number; operating the entire video constituting the video based on the reproduction time before the expansion and contraction of the video and the reproduction time after the expansion and contraction of the video. Calculating the number of operation frames indicating the number of frames to be processed; and From all the frames constituting the image, in the order of decreasing the video change rate, a step of selecting a number of frames equal to the number of the operation frames, and a step of transmitting the recorded video, comprising transmitting the video, For each selected frame, when extending the playback time, perform a frame operation to repeat the transmission of the video of the frame multiple times, and when shortening the playback time, execute the transmission of the video of the frame. A reproduction time expansion / contraction method characterized by performing a frame operation that does not perform the operation.