JPH0884319A - Moving picture reproducing device and moving picture recording and reproducing device - Google Patents

Abstract

PURPOSE: To attain automatic variable speed reproduction in which a reproduction speed differs for an important scene and for an unimportant scene. CONSTITUTION: The device is provided with a sound volume measurement section 9 measuring the amplitude of a sound signal reproduced from a recording medium and a speed decision section 10 deciding a reproduction speed of a recording medium based on the measurement result by the sound volume measurement section 9. When an audio signal is reproduced from the recording medium, the sound volume measurement section 9 measures the amplitude of the sound and the reproduction speed is decided depending on the amount of the measured sound, and then for example, for a scene with a larger sound, the recording medium is slowly reproduced and on the contrary, for the scene with a smaller sound, the recording medium is faster reproduced to attain automatic variable speed reproduction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moving picture reproducing apparatus and a moving picture recording / reproducing apparatus, and is used for, for example, an apparatus for recording and reproducing a moving picture and a sound on a recording medium such as a tape, a disk and a semiconductor memory. Is suitable.

[0002]

2. Description of the Related Art Conventionally, the moving picture reproducing speed in a moving picture reproducing apparatus has been set by manually operating a button or a dial.

When a button is operated for reproduction, the reproduction is performed at a speed of a magnification peculiar to the button. For example, if the play button is pressed, playback is performed at normal speed, and if the fast-forward button is pressed during playback, for example, 3
Fast forward playback is performed at double speed.

When the dial is operated for reproduction, the reproduction speed may change depending on the rotation angle of the dial, or the reproduction speed may change depending on the speed at which the dial is rotated.

[0005]

In the moving picture reproducing apparatus constructed as described above, by operating buttons or dials, it is often done to speed up the reproduction of unimportant scenes to save time. There is.

However, since the conventional moving picture reproducing apparatus operates while judging whether or not the user is important while looking at the screen, even if the user tries to slow down the reproducing speed after finding an important scene during fast reproduction, the judgment is made. However, there is a drawback that important scenes may pass by due to delays in operations.

In view of the above-mentioned problems, it is an object of the present invention to automatically perform variable speed reproduction which makes the reproduction speed different between an important scene and a scene not.

[0008]

A moving picture reproducing apparatus of the present invention is a moving picture reproducing apparatus for reproducing an image signal and an audio signal recorded on a recording medium, and measures the size of the audio signal reproduced from the recording medium. And a reproduction speed determining means for determining the reproduction speed of the recording medium based on the measurement result of the volume measuring means.

Another feature of the present invention is that
The reproduction speed determination means reproduces faster than usual as the volume of the audio signal recorded on the recording medium or the audio signal reproduced from the recording medium is smaller, and conversely, as the volume is larger, the reproduction speed is closer to normal. It is characterized by doing.

Another feature of the present invention is a moving picture recording / reproducing apparatus for recording an image signal and an audio signal on a recording medium and reproducing the image signal and the audio signal recorded on the recording medium. Volume measuring means for measuring the size of the audio signal recorded on the recording medium or the audio signal reproduced from the recording medium, and reproduction for determining the reproducing speed of the recording medium based on the measurement result of the volume measuring means. A speed determining means, a speed data storing means for storing the reproducing speed data determined by the reproducing speed determining means, and a reproducing speed data recorded in the recording medium based on the reproducing speed data stored in the speed data storing means. And a speed control means for reproducing the audio signal and the image signal.

Another feature of the present invention is that in a moving image reproducing apparatus for reproducing an image signal recorded on a recording medium, the moving speed of an object in the image signal reproduced from the recording medium is measured. A moving speed measuring means and a reproducing speed determining means for determining a reproducing speed of the recording medium based on a measurement result of the moving speed measuring means are provided.

Another feature of the present invention is that the reproducing speed determining means reproduces faster than usual as the moving speed becomes smaller, and on the contrary, becomes closer to normal as the moving speed becomes larger. Is characterized by.

Another feature of the present invention is that in a moving picture recording / reproducing apparatus for recording an image signal on a recording medium and reproducing the image signal recorded on the recording medium, the moving image is recorded on the recording medium. Moving speed measuring means for measuring the moving speed of the object in the image signal, reproducing speed determining means for determining the reproducing speed of the recording medium based on the measurement result of the moving speed measuring means, and the reproducing speed determining means. Speed data storage means for storing the reproduced reproduction speed data, and speed control means for reproducing the image signal recorded on the recording medium based on the reproduction speed data stored in the speed data storage means. It is characterized by being provided.

Another feature of the present invention is that in a moving picture reproducing apparatus for reproducing an audio signal and an image signal recorded on a recording medium, the magnitude of the audio signal reproduced from the recording medium is measured. Volume measuring means, moving speed measuring means for measuring the moving speed of an object in the image signal reproduced from the recording medium, and reproduction speed of the recording medium based on the measurement results of the volume measuring means and moving speed measuring means. And a speed control means for reproducing the audio signal and the image signal recorded on the recording medium based on the reproduction speed determined by the reproduction speed determination means. To do.

Another feature of the present invention is a moving picture recording / reproducing apparatus for recording an image signal and an audio signal on a recording medium and reproducing the image signal and the audio signal recorded on the recording medium. Volume measuring means for measuring the magnitude of the audio signal recorded on the recording medium or the audio signal reproduced from the recording medium, and the image signal recorded on the recording medium or the object in the image signal reproduced from the recording medium Moving speed measuring means for measuring a moving speed of the recording medium, a reproducing speed determining means for determining a reproducing speed of the recording medium based on the measurement result of the volume measuring means and the measuring result of the moving speed measuring means, and the reproducing speed determining means. Speed data storage means for storing the reproduction speed data determined by the means, and the reproduction speed stored in the speed data storage means Characterized by providing the speed control means for reproducing audio signals and image signals recorded on the recording medium based on chromatography data.

[0016]

Since the present invention comprises the above technical means, when the recording medium is reproduced, the size of the audio signal reproduced from the recording medium is measured, and the reproduction of the recording medium is performed based on the measurement result. The speed is determined, and the recording medium is reproduced at a variable speed at the determined reproduction speed. This makes it possible to automatically perform variable-speed reproduction in which, for example, a screen with louder sound is played back slowly, and a scene with lesser sound is played back faster. According to another technique of the present invention, the size of the audio signal recorded on the recording medium or the audio signal reproduced from the recording medium is measured, and the reproduction of the recording medium is performed based on the measurement result. The speed is determined.

According to another feature of the present invention, the moving speed of the object in the image signal reproduced from the recording medium is measured, and the reproducing speed of the recording medium is determined based on the measurement result. The recording medium is reproduced at a variable speed at the determined reproduction speed. Accordingly, for example, it is possible to automatically perform the variable speed reproduction in which the screen is reproduced slowly as the moving speed of the object is high and the screen is reproduced fast as the moving speed of the object is low.
According to another technique of the present invention, the size of the image signal recorded on the recording medium or the image signal reproduced from the recording medium is measured, and the reproduction of the recording medium is performed based on the measurement result. The speed is determined.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the moving picture recording / reproducing apparatus of the present invention will be described below with reference to the drawings. The moving picture recording / reproducing apparatus of the present embodiment is constructed by paying attention to the following points. That is, for example, when a sports broadcast is recorded, non-important scenes are often reproduced faster than usual, and only important scenes are often reproduced at normal speed.

In order to automatically perform such variable-speed reproduction, it is generally highly likely that the louder the voice of the announcer or the audience, the more important the scene. Therefore, in the present embodiment, a sound volume measuring means for measuring the sound volume and a reproducing speed determining means for controlling the reproducing speed as needed based on the measurement result are provided.

FIG. 1 shows a first embodiment of the moving picture recording / reproducing apparatus of the present invention.
It is a block diagram showing each function of the embodiment of. In FIG. 1, 1 is a tuner, 2 is a recording unit, 3 is a magnetic tape, 4
Is a reproducing unit, 5 is a television receiver, 6 is a counter, 7 is a recording reservation timer, 8 is a remote controller, 9 is a volume measuring unit, 10 is a speed determining unit, and 11 is a speed control unit.

In the video recording unit 2 of the moving picture recording / reproducing apparatus of this embodiment having the above-mentioned structure, the video signal and the audio signal inputted from the tuner 1 are determined by the recording command of the recording reservation timer 7 or the remote controller 8. The signal is converted into a recording format signal and recorded on the magnetic tape 3.

The reproducing section 4 also converts the signal recorded on the magnetic tape 3 into a video signal and an audio signal in accordance with a reproduction command from the remote controller 8 and outputs the video signal and the audio signal to the television receiver 5. The value of the counter 6 is incremented when the magnetic tape 3 advances in the forward direction and is decremented when it advances in the reverse direction, and corresponds to each frame on a one-to-one basis. Note that 30 frames is 1 second.

FIG. 2 is a diagram showing the operation buttons of the remote controller 8 in this embodiment. In FIG. 2, 28 is a channel button for designating a channel selected by the tuner 1. A recording button 25 is used to start recording. Reference numeral 22 denotes a reproduction button, which is for reproducing at a normal speed. Reference numeral 23 denotes a fast-forward button, which is for performing fast-forwarding while reproducing during reproduction, and performing fast-forwarding at high speed during reproduction.

Reference numeral 21 denotes a rewind button. When the rewind button 21 is pressed, the rewind is performed while the reproduction is being performed, and the rewind is performed at a high speed when the reproduction is not being performed. 26
Is a stop button for stopping recording, playback, fast forward, and rewind. 27 is a pause button,
If the recording is in progress, the recording is temporarily stopped, and if the reproduction is in progress, the still image is reproduced. Further, when the pause button is pressed again, recording or normal reproduction is performed.

Reference numeral 24 denotes an automatic variable speed reproduction button, which is a button unique to this embodiment, and is for performing reproduction while automatically controlling the speed by the following mechanism. The sound volume measuring unit 9 rectifies and smoothes the audio signal by the device shown in FIG.
As shown in the characteristic diagram of (3), the volume corresponding to the value of the counter 6 is obtained.

As shown in FIG. 4, the speed determining unit 10 includes an integrating circuit 10a and a volume-playback speed table device 10b.
And the integration circuit 10a integrates the sound volume for 5 seconds each,
The volume / playback speed table device 10b determines the playback speed from the table of Table 1.

[0027]

[Table 1]

[0028]

[Table 2]

The speed control unit 11 controls the reproduction unit 4 so that the reproduction is performed at the above speed. By operating as described above, a scene with a low volume is reproduced faster than usual, and a scene with a high volume is reproduced at a speed closer to the normal rate.

Thus, assuming that the higher the volume is, the more important the scene is, the less important scene is reproduced faster than usual, and the more important scene is reproduced at a speed closer to the normal speed. You can In this embodiment, the volume is integrated every 5 seconds based on the value of the counter 6, but this interval may be changed arbitrarily.

Next, a second embodiment of the moving picture recording / reproducing apparatus of the present invention will be described. FIG. 6 is a functional block diagram of the second embodiment of the present invention. In the second embodiment, the reproduction speed is determined at the time of recording and the counter 6 is stored in the speed storage unit 12.
Data indicating the correspondence between the value of and the reproduction speed is stored.

However, since the moment the volume becomes loud has already become an important scene, the speed is returned to a speed close to the normal speed a few seconds before that. Therefore,
When data is stored in the speed storage unit 12 as in the example of Table 3, for example, when the speed becomes slower than 5 seconds ago, the speed 5 seconds ago is corrected to be the same as the current speed. I try to remember it from

[0033]

[Table 3]

During recording, the volume measuring section 9
The sound signal is rectified and smoothed by the sound volume measuring unit 9 shown in FIG. 3, and the sound volume corresponding to the value of the counter 6 is obtained as in the example of FIG.

As shown in FIG. 4, the speed determining section 10 is composed of an integrating circuit 10a and a volume-playback speed table device 10b. The integrating circuit 10a integrates the volume for 5 seconds, and the volume-playback speed table device 10b displays the volume. The reproduction speed is determined from the table No. 1 and the correspondence data between the value of the counter 6 and the reproduction speed is stored in the speed storage unit 12.

During reproduction, the speed controller 11
Is the speed storage unit 1 according to the automatic speed change reproduction command of the remote controller 8.
From 2 to read the playback speed corresponding to the value of the counter 6,
The reproduction unit 4 is controlled so that the reproduction is performed at the read speed.

As described above, in this embodiment, the speed storage unit 1
Since the reproduction speed is determined at the time of recording by providing 2, the speed can be returned to the normal speed from a few seconds before the volume becomes large.

In the second embodiment, the determined speed is corrected by comparing it with the speed 5 seconds before.
The comparison time may be changed arbitrarily.

Next, a third embodiment of the moving picture recording / reproducing apparatus of the present invention will be described. FIG. 7 is a functional block diagram of the moving picture recording / reproducing apparatus of the third embodiment of the present invention. In the third embodiment, the motion measuring unit 13 measures the speed of movement of an object on the screen, and the slower the moving screen, the slower the moving image and the slower the moving image.

As shown in FIG. 8, the motion measuring unit 13 is composed of a quantizing circuit 13a, a center of gravity measuring unit 13b, and a center of gravity moving amount measuring unit 13c. The center of gravity is calculated for each color, and the moving amount is calculated according to the moving amount. I try to find the speed of movement.

That is, first, the quantizing circuit 13a quantizes each pixel of one frame of an image into four colors of white, light gray, dark gray and black. Next, the center of gravity measuring unit 13b calculates the average of the X coordinates and the average of the Y coordinates of the pixels for each color to obtain the center of gravity. Furthermore, the position of the center of gravity one second before and the position of the current center of gravity are compared for each color by the center-of-gravity movement amount measuring unit 13c, and the amount of movement is obtained at a distance of 4 neighborhoods.

That is, the coordinates of the center of gravity of the current screen are (x
1, y1) The coordinates of the center of gravity of the screen one second before are (x0, y
0), the movement amount is | x1-x0 | + | y1-y
It can be represented by 0 |.

The maximum value of the moving amount of the center of gravity of each of the four colors is taken as the moving speed of the scene. Then, the reproduction speed is determined based on the table of Table 4 according to the speed of movement.
Since it is troublesome to change the reproduction speed every one second, in practice, the reproduction speed is determined by averaging the movement speeds obtained every one second every five seconds.

[0044]

[Table 4]

In the example of FIG. 9, the screen (A),
Each of (B) and (C) is a screen every 1 second, and has 640 pixels in the X direction and 480 pixels in the Y direction. The coordinates of the center of gravity of each color and the amount of movement of the center of gravity are calculated as shown in Table 5.

[0046]

[Table 5]

As described above, in this embodiment, the motion measurement 13
Is provided, and the motion measurement 13 is operated as described above, so that a screen with fast motion is played back slowly. As a result, a fast-moving screen becomes easier to see by slow-moving, and conversely, a slow-moving screen becomes faster to shorten the playback time.

The reproduction speed in the third embodiment may be determined at the time of reproduction as in the case of the first embodiment, or at the time of recording as in the case of the second embodiment. May be.

[0049]

As described above, according to the present invention, the loudness of a voice is measured and the reproduction speed is determined based on the measurement result. In a large scene, it is possible to surely perform the variable speed reproduction operation of slowly reproducing. Therefore, even when a scene is desired to be played back slowly while the recording medium is being played back quickly, it is possible to reliably avoid the inconvenience of passing by.

According to another feature of the present invention, the moving speed of the object in the image signal is measured, and the reproducing speed of the recording medium is determined based on the measurement result of the moving speed measuring means. Therefore, for example, it is possible to surely perform the variable speed reproduction operation in which the reproduction is performed fast in a scene in which the moving speed of the object is small, and on the contrary, is slowly reproduced in the scene in which the moving speed of the object is large. Therefore, in this case as well, even if a scene is desired to be played back slowly during fast playback, it is possible to reliably avoid the inconvenience of passing by.

Further, according to another feature of the present invention, the loudness of the voice in the voice signal is measured and the moving speed of the object in the image signal is measured, and based on these measurement results. Since I decided to decide the playback speed,
For example, it is possible to reliably perform a variable speed reproduction operation in which a fast playback is performed in a low-sound scene or a low moving speed of an object, and a low-speed playback is performed in a high-sound sound or a high moving speed of an object. The effect is that you can do it. Therefore, in this case as well, even if a scene is desired to be played back slowly during fast playback, it is possible to reliably avoid the inconvenience of passing by.

According to another feature of the present invention, the reproduction speed is determined at the time of recording and the reproduction speed data thus determined is stored. From this scene, the recording medium can be reproduced at the normal reproduction speed.

[Brief description of drawings]

FIG. 1 is a block diagram of a moving picture recording / reproducing apparatus showing a first embodiment of the present invention.

FIG. 2 is a diagram showing a state of operation buttons of a remote controller.

FIG. 3 is a block diagram showing a configuration of a volume measuring unit.

FIG. 4 is a block diagram showing a configuration of a speed determination unit.

FIG. 5 is a characteristic diagram showing an example of sound volume over time.

FIG. 6 is a block diagram of a moving picture recording / reproducing apparatus showing a second embodiment of the present invention.

FIG. 7 is a block diagram of a moving picture recording / reproducing apparatus showing a third embodiment of the present invention.

FIG. 8 is a block diagram showing a configuration of a motion measuring unit.

FIG. 9 is a diagram showing a specific example of movement of the center of gravity for each color.

[Explanation of symbols]

 1 Tuner 2 Recording Section 3 Magnetic Tape 4 Playback Section 5 Television Receiver 6 Counter 7 Recording Schedule Timer 8 Remote Control 9 Volume Measuring Section 10 Speed Determining Section 11 Speed Control Section 12 Speed Storage Section 13 Motion Measuring Section

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ryoji Fukuda 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Shigeki Mori 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon (72) Inventor Takashi Harada 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Shinichi Sunagawa 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. ( 72) Inventor Katsuhiko Nagasaki 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc.

Claims (8)

[Claims] 1. In a moving picture reproducing apparatus for reproducing an image signal and an audio signal recorded on a recording medium, a sound volume measuring means for measuring a size of an audio signal reproduced from the recording medium, and measurement of the sound volume measuring means. A moving picture reproducing apparatus comprising: a reproducing speed determining means for determining a reproducing speed of the recording medium based on the result. 2. The reproducing speed determining means reproduces the audio signal reproduced from the recording medium faster than usual as the volume of the audio signal decreases, and conversely reproduces at a speed closer to normal as the volume of the audio signal increases. The moving picture reproducing apparatus according to claim 1. 3. A moving image recording / reproducing apparatus for recording an image signal and an audio signal on a recording medium and reproducing the image signal and the audio signal recorded on the recording medium, the audio signal being recorded on the recording medium, or The volume measuring means for measuring the size of the audio signal reproduced from the recording medium, the reproducing speed determining means for determining the reproducing speed of the recording medium based on the measurement result of the volume measuring means, and the reproducing speed determining means. Speed data storage means for storing the determined reproduction speed data, and speed for reproducing the audio signal and the image signal recorded on the recording medium based on the reproduction speed data stored in the speed data storage means. A moving picture recording / reproducing apparatus comprising a control means. 4. A moving picture reproducing apparatus for reproducing an image signal recorded on a recording medium, a moving speed measuring means for measuring a moving speed of an object in the image signal reproduced from the recording medium, and the moving speed measuring means. And a reproducing speed determining means for determining a reproducing speed of the recording medium based on the measurement result of 1. The moving image reproducing apparatus. 5. The moving image according to claim 4, wherein the reproduction speed determination means performs reproduction at a speed lower than usual as the moving speed becomes smaller, and on the contrary, at a speed closer to normal as the moving speed becomes larger. Playback device. 6. A moving picture recording / reproducing apparatus for recording an image signal on a recording medium and reproducing the image signal recorded on the recording medium, wherein the moving speed of an object in the image signal recorded on the recording medium is measured. A moving speed measuring means, a reproducing speed determining means for determining a reproducing speed of the recording medium based on the measurement result of the moving speed measuring means, and a speed for storing the reproducing speed data determined by the reproducing speed determining means. A moving picture recording / reproducing apparatus comprising: a data storage means; and a speed control means for reproducing an image signal recorded on the recording medium based on reproduction speed data stored in the speed data storage means. . 7. A moving picture reproducing apparatus for reproducing an audio signal and an image signal recorded on a recording medium, the sound volume measuring means for measuring the size of the audio signal reproduced from the recording medium, and the reproducing apparatus for reproducing from the recording medium. Moving speed measuring means for measuring the moving speed of the object in the image signal, a reproducing speed determining means for determining a reproducing speed of the recording medium based on the measurement results of the volume measuring means and the moving speed measuring means, and the reproducing means. A moving picture reproducing apparatus comprising: speed control means for reproducing an audio signal and an image signal recorded on the recording medium based on the reproduction speed determined by the speed determining means. 8. A moving image recording / reproducing apparatus for recording an image signal and an audio signal on a recording medium and reproducing the image signal and the audio signal recorded on the recording medium, the audio signal being recorded on the recording medium, or Volume measuring means for measuring the size of the audio signal reproduced from the recording medium, and moving speed measurement for measuring the moving speed of the image signal recorded on the recording medium or the object in the image signal reproduced from the recording medium. Means, a reproduction speed determination means for determining the reproduction speed of the recording medium based on the measurement result of the volume measurement means and the measurement result of the movement speed measurement means, and the reproduction speed data determined by the reproduction speed determination means. A speed data storage means to be stored and recorded on the recording medium based on the reproduction speed data stored in the speed data storage means. Video recording and reproducing apparatus characterized by comprising a speed control means for reproducing audio signals and image signals are.