JPH1118057A - Device and method for reproducing video signal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain improvement of retrievability at the time of high-speed reproduction and the reduction in the sense of fatigue or discomfort and to enable efficient retrieval by controlling the number of times of repetition for outputting the intermittent signal of an intermit signal processing means, together with the reading interval of a video signal reading means corresponding to reproduced additional information. SOLUTION: An additional information reproducing processing part 8 reproduces the additional information on the contents of a recorded video signal, together with the video signal on a recording medium 1. When reproducing the video signal from the recording medium 1 at a speed higher than the ordinary reproducing speed, a video signal reading part 2 outputs the intermittent signal by intermittently reading this video signal at every prescribed frame interval corresponding to the reproducing speed. A video signal reproducing processing part 3 outputs the outputted intermittent signals for one frame repeatedly for a prescribed number of times. Corresponding to the additional information reproduced by the additional information reproducing processing part 8, a main control part 7 controls the frame reading interval of the video signal reading part 2 and the number of times of repeated intermit signal outputs from the video signal reproducing processing part 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video signal reproducing apparatus and a video signal reproducing method, and more particularly, to a video signal reproducing apparatus and a video signal reproducing method capable of efficiently searching at high speed reproduction.

[0002]

2. Description of the Related Art In a conventional video signal reproducing apparatus which reads an analog or digital signal from a recording medium such as an optical disk or a hard disk and reproduces the analog or digital signal as a video signal or an audio signal, a high-speed reproduction of about twice or three times is performed. In addition, the video signal for one frame is read out intermittently every two or three frames, and the intermittent video signal is output for each frame.

Further, in such a conventional video signal reproducing apparatus, when a higher speed reproduction such as a 10 × speed or a 20 × speed is performed in order to achieve a quick search, for example, a video signal and an audio signal (hereinafter simply referred to as a video signal) are used. Video signal reproducing apparatus for reproducing an optical disc on which
A method of intermittently reading an image by a seek operation of moving an optical pickup in a radial direction of an optical disk has been adopted. Here, when performing such high-speed playback,
Since the video signal for one frame before and after one frame intermittently read at a constant frame interval according to the reproduction magnification has low mutual correlation, when this is output for each frame, the output is output. The image suddenly changes, making it very difficult to search. Therefore, in the related art, when performing further high-speed reproduction as described above, a method of continuously outputting a video signal of one frame intermittently read at a fixed frame interval for a plurality of frames and reproducing the video signal. Was commonly used.

[0004]

However, in such a conventional reproducing method, the amount of change (movement) of an image, the presence or absence of a scene change, and the like during the high-speed reproduction at the 10-times and 20-times speed levels described above. Irrespective of the content of the reproduced image, the video signal is read from the recording medium at a constant frame interval corresponding to the reproduction magnification. Therefore, in the conventional reproduction method, at the time of high-speed reproduction for the purpose of search, quick view, and the like, for example, in a place where the image changes drastically, an image with a small correlation before and after is continuously reproduced. There is a problem that it becomes difficult to do.

It is known that, for example, when a video signal is reproduced at a rate of 30 frames / sec, the upper limit of the number of uncorrelated images to be displayed is about 5 per second. That is, the upper limit is to repeatedly display five types of mutually uncorrelated images for six frames per second. Although this value is an average value and varies among individuals, generally, when information is further increased (for example, six types of mutually uncorrelated images are repeatedly displayed for five frames each), it becomes tired to see. Alternatively, it is known that the content cannot be determined.

Further, in such a conventional reproducing method, a sudden change of the reproduced image occurs continuously in a place where the image is largely changed, which gives stress to human vision and the like. Not suitable. For this reason,
In such a conventional reproduction method, the reproduction magnification at the time of retrieval is limited, and efficient retrieval cannot be performed.

The present invention has been proposed in order to solve the above-mentioned problems, and is intended to improve the searchability at the time of high-speed reproduction, reduce fatigue and discomfort, and perform an efficient search. It is an object of the present invention to provide a video signal reproducing apparatus and a video signal reproducing method that can perform the above.

[0008]

A video signal reproducing apparatus according to the present invention which has achieved the above object has an additional information reproducing means for reproducing additional information relating to the contents of a video signal recorded together with a video signal on a recording medium; When a video signal is reproduced from a medium at a higher speed than a normal reproduction speed, video signal reading means intermittently reads out the video signal at predetermined frame intervals according to the reproduction speed and outputs the video signal as an intermittent signal. Intermittent signal processing means for repeatedly outputting intermittent signals for frames a predetermined number of times, and outputting intermittent signals of intermittent signal processing means and intervals between frames read out by the video signal reading means according to the additional information reproduced by the additional information reproducing means. And control means for controlling the number of repetitions.

According to the video signal reproducing apparatus, the content of the video signal is controlled by controlling the read interval of the video signal reading means and the number of repetitions for outputting the intermittent signal in the intermittent signal processing means in accordance with the reproduced additional information. Is performed in accordance with the high-speed reproduction process.

A video signal reproducing method according to the present invention that achieves this object reproduces additional information relating to the contents of the video signal recorded together with the video signal from a recording medium, and reproduces the video signal from the recording medium at a normal reproduction speed. When the video signal is reproduced at a higher speed, the video signal is read out intermittently at predetermined frame intervals according to the reproduction speed and the reproduced additional information and output as an intermittent signal, and the output intermittent signal for one frame is output. The information is repeatedly output a predetermined number of times according to the reproduced additional information.

According to the video signal reproducing method, the interval between frames from which the video signal is read and the number of repetitions for outputting the intermittent signal are determined according to the reproduced additional information.
At the time of high-speed reproduction, images read from the recording medium are displayed for a certain period of time.

Further, the video signal reproducing apparatus according to the present invention, which achieves this object, provides a video signal recorded with a video signal when the video signal is reproduced from a recording medium at a higher speed than a normal reproduction speed. Signal reading means for intermittently outputting additional information relating to the content of the content at predetermined frame intervals according to the reproduction speed as an intermittent signal, and additional information detection for detecting additional information from the intermittent signal output from the video signal reading means Means, storage means for storing the intermittent signal output from the video signal reading means, intermittent signal processing means for repeatedly reading the intermittent signal for one frame from the storage means a predetermined number of times, and intermittent signal processing in accordance with the detected additional information. The interval between frames for reading out a new intermittent signal from the storage means by the signal processing means and the intermittent signal for one frame from the storage means And a control means for controlling the number of times the read returns Ri.

[0013] According to the video signal reproducing apparatus, in accordance with the additional information detected from the intermittent signal, the video signal reading means intermittently reads out from the recording medium, and the intermittent signal processing means outputs a new intermittent signal from the storage means. By controlling the interval between frames from which signals are read out and the number of times the intermittent signals for one frame are repeatedly read out from the storage means, high-speed reproduction according to the content of the video signal is performed.

Furthermore, the video signal reproducing method according to the present invention, which achieves this object, provides a method of reproducing a video signal from a recording medium at a higher speed than a normal reproduction speed. By outputting the additional information on the content of the signal intermittently at predetermined frame intervals corresponding to the reproduction speed, the additional information is output as an intermittent signal, the output intermittent signal is stored, and the additional information is detected from the output intermittent signal, The stored intermittent signal for one frame is repeatedly read out a predetermined number of times in accordance with the additional information, and is output at a frame interval corresponding to the additional information.

According to the video signal reproducing method, the interval between frames from which the video signal is read and the number of repetitions for outputting the intermittent signal are determined according to the detected additional information.
At the time of high-speed reproduction, images read from the recording medium are displayed for a certain period of time.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings. In FIG. 1 showing the first embodiment of the present invention, a video signal reproducing device 10
Is a video signal reading unit 2, a video signal reproduction processing unit 3,
Output signal processing unit 4, operation input processing unit 6, main control unit 7
And an additional information reproduction processing unit 8. Note that the video signal reproducing device 10 operates based on an operation input from the remote controller 5.

The video signal reading section 2 reads a video signal and additional information from the recording medium 1 based on a control signal from the main control section 7. The video signal reading unit 2 is configured by, for example, an optical pickup or the like, and performs a binarization process, an error correction process, and the like on the video signal and the additional information read from the recording medium 1, and then converts the video signal into a video signal. The additional information is supplied to the reproduction processing unit 3 to the additional information reproduction processing unit 8. Further, the video signal reading unit 2 detects a synchronization signal from the video signal, and supplies the synchronization signal to the main control unit 7.

The video signal reading section 2 reads video signals from the recording medium 1 at frame intervals corresponding to the reproduction magnification selected by the remote controller 5. That is, in the video signal reproducing apparatus 10, when performing high-speed reproduction, an image is thinned out from the video signal at the time of normal reproduction and reproduced. The signal is read out intermittently.

The recording medium 1 is, for example, an optical disk, a magneto-optical disk, or the like. The recording medium 1 records a video signal and additional information indicating the content of the video signal.

Here, the additional information is information that is additionally recorded in advance when a video signal is recorded on the recording medium 1 as data other than the image on the recording medium 1. In this embodiment, an image feature amount and identification information are recorded as additional information. Among them, the image feature amount refers to a motion amount obtained by motion detection, scene change information obtained by scene change point detection, and the like. On the other hand, the identification information refers to information inserted in a vertical retrace period other than image data or information superimposed on a video signal such as a pilot signal in the video signal. Specifically, the content of a program, Information about genre, presence / absence of character information, presence / absence of music, etc. The identification information is recorded at the head of the recording medium 1 (in the case of an optical disk or a magneto-optical disk, the TOC portion). Further, as the identification information, for example, a classification such as a highlight portion may be performed on a layer below the genre information, and the classification information may be recorded.

The video signal reproduction processing unit 3 performs a process of reproducing the video signal read by the video signal reading unit 2. The video signal reproduction processing unit 3 performs, for example, an analog / digital conversion process if necessary, and performs an expansion process when an image compression process such as MPEG is performed.
Further, the video signal reproduction processing unit 3 performs
A one-frame video signal intermittently supplied from the video signal reading unit 2 is repeatedly output a predetermined number of times based on a control signal from the main control unit 7. The video signal reproduction processing unit 3 supplies the video signal subjected to such reproduction processing to the output signal processing unit 4.

The output signal processing unit 4 performs an amplification process or the like so that the video signal supplied from the video signal reproduction processing unit 3 can be reproduced by a monitor. Video signal playback device 1
0, the video signal can be viewed in various reproduction modes by supplying the output from the output signal processing unit 4 to a monitor or the like. Note that the output signal processing unit 4 outputs a video signal for 30 frames per second.

The remote controller 5 gives various operation commands to the video signal reproducing device 10.
For example, power on / off of the entire video signal reproducing apparatus 10, reproduction / stop of the video signal, high-speed reproduction / slow reproduction / pause during reproduction of the video signal, and setting / change of the reproduction speed during high-speed reproduction, and the like. The instruction is output as an operation input signal. Remote controller 5
This operation input signal is received by the operation input processing unit 6.

The operation input processing unit 6 receives an operation input signal from the remote controller 5, detects the type of command, and supplies the detection signal to the main control unit 7.

The main control unit 7 is based on the detection signal from the operation input processing unit 6, and based on the detection signal, the video signal reading unit 2, the video signal reproduction processing unit 3, the output signal processing unit 4, and the additional information reproduction processing unit 8
Control.

The main control section 7 detects a synchronization signal from the video signal reproduction processing section 3 and generates a clock from the synchronization signal. The main control unit 7 supplies the generated clock to the video signal reading unit 2, the video signal reproduction processing unit 3, the output signal processing unit 4, and the like.

The additional information reproduction processing section 8 reproduces the above-mentioned additional information supplied from the video signal reading section 2. The additional information reproduced by the additional information reproduction processing unit 8 is used for control during high-speed reproduction by being input to the main control unit 7. In the case of MPEG, since the motion information indicating the motion amount of the image feature amount described above exists in the bit stream, the motion information of the read frame or information in the vicinity thereof, for example, an I-picture for random access is used.
, The motion information in the P, B-picture is detected. Since this motion information exists in units obtained by dividing the screen into fine blocks (macroblocks), the average of the obtained amount of motion (the direction can be ignored) is calculated for one screen. Further, the average of the motion amount is averaged over several frames of the acquired frames, thereby reproducing the additional information.

Next, the operation of the main controller 7 in the video signal reproducing apparatus 10 will be described with reference to the flowchart of FIG. In step S1 after the power is turned on, the main control unit 7
Performs initial processing, that is, initialization of the video signal reading unit 2, the video signal reproduction processing unit 3, the operation input processing unit 6, and the like, and proceeds to step S2.

The main controller 7 enters an operation input waiting state of waiting for an operation input signal from the remote controller 5 in step S2. Specifically, the main control unit 7 determines whether or not there is an operation input by detecting the presence or absence of a detection signal from the operation input processing unit 6, and waits in step S2 until there is an operation input, If there is an operation input, the process proceeds to step S3. In step S3, the main control unit 7 determines whether or not high-speed playback has been designated by the operation input. If it is determined that high-speed playback is not performed, the process proceeds to step S4, where normal playback processing for video signals is performed. I do.

When it is determined in step S3 that the high-speed reproduction is performed, the main control section 7 proceeds to step S5, and performs the following high-speed reproduction processing.

In step S5, the main control section 7 controls the additional information reproduction processing section 8 to operate together with the video signal reading section 2. With this control, the additional information reproduction processing unit 8 reproduces the additional information, and supplies the additional information to the main control unit 7 before reproducing the video signal. The reproduction of the additional information is performed for all the frames of the video signal recorded on the recording medium 1, but may be performed only for a certain range of frames in order to quickly shift to the reproduction operation of the video signal. .

In the next step S6, the main control unit 7
Selects the number of frames from which video signals are read from the recording medium 1 per fixed time according to the reproduction magnification of high-speed reproduction.
Thus, in the video signal reproducing device 10, the video signal recorded on the recording medium 1 is read by the video signal reading unit 2 in accordance with the reproduction magnification selected by the remote controller 5 (hereinafter, referred to as a reading interval). ) Will be selected.

In the following step S7, the main control unit 7
Reflects the additional information supplied from the additional information reproduction processing unit 8 in the above-described read interval, and appropriately changes the read interval in accordance with the additional information. Video signal reproducing device 10
Then, by this processing in step S7, the final number of frames of an image output during high-speed reproduction, that is, the number of frames of a video signal intermittently read per unit time (hereinafter, referred to as the number of read frames) and this reading. 1 issued
The number of frames for repeatedly outputting video signals for frames (hereinafter, referred to as the number of display frames) is determined. Note that the relationship between the number of read frames and the number of display frames is inversely proportional when the reproduction magnification is fixed.

In the next step S8, the main control section 7 controls the video signal reading section 2 to skip and reproduce the necessary video signals from the recording medium 1 intermittently based on the determined number of read frames. Read out. This step S8 is a process of sequentially reading out discrete images.

Further, in the next step S9, the main control section 7 controls the video signal reproduction processing section 3 so as to repeatedly output the image read by this reading processing by the number of display frames.

With this series of controls, the video signal reproducing apparatus 10 enters an operation mode in which the video signal is reproduced at a high speed according to the reproduction magnification selected by the remote controller 5, and then returns to step S2 to return to the next operation input. Wait state.

Hereinafter, a more specific control method in the high-speed reproduction process of the video signal reproducing apparatus 10 will be described. In step S6, the main control unit 7 determines the output method of the video signal by selecting the number of frames from which the video signal is read out per fixed time according to the reproduction magnification.

FIG. 3 shows an example of the case of performing 10 × speed reproduction. Hereinafter, a case where the video signal of 1200 frames and 40 seconds shown in FIG. 3A is reproduced at 120 frames and 4 seconds at high speed will be described. . In addition, about this high-speed reproduction,
For convenience of description, FIGS. 3B to 3G show only three types of patterns, but the present invention is not limited to these three types of patterns. Also, this high-speed reproduction will be described only for the case of 10 × speed reproduction, but the present invention is not limited to this 10 × speed for high speed reproduction, and is also applicable to high speed reproduction of 10 × speed or less or 10 × speed or more. Of course, you can.

In the video signal reproducing apparatus 10, for example, at the time of 10-times speed reproduction, the reading interval (number of reading frames) of three patterns A, B, and C can be selected. In the case of pattern A, the read interval is every 150 frames, and the number of read frames per 40 seconds is 8
It has become. Specifically, as shown in FIG.
Video signals A ₁ , B ₁ , C ₁ , D ₁ ,... For a total of 8 frames at intervals of 150 frames from 1200 frames of video signals
- read the H _1. In the pattern A, the number of display frames is 15, and as shown in FIG. 3E, each of the read video signals A _{1 to} H ₁ is successively repeated 15 times (for 15 frames). ) At a time, 8 × 15 = 120 frames are constituted in 4 seconds.

In the case of the B pattern, the read interval is every 300 frames, and the number of read frames per 40 seconds is 4. More specifically, as shown in FIG.
A total of four frames of video signals A ₁ , C ₁ ,
Read E ₁ and G ₁ . In the B pattern, the number of display frames is 30, and as shown in FIG. 3 (F), the read video signals A ₁ , C ₁ , E ₁ ,
And G ₁ each consecutive 30 times (30 frames)
4 × 30 = 120 frames in 4 seconds.

Further, in the case of the C pattern, the reading interval is every 600 frames, and the number of reading frames per 40 seconds is 2. Specifically, FIG.
As shown in FIG.
The video signals A ₁ and E ₁ for a total of two frames are read at 0-frame intervals. In the C pattern, the number of display frames is 60. As shown in FIG. 3F, each of the read video signals A ₁ and E ₁ is successively repeated 60 times (for 60 frames). ) At a time, 2 × 60 = 120 frames are formed in 4 seconds.

In the video signal reproducing apparatus 10, when the reproducing speed is 10 times as described above, one of the above-mentioned three patterns is selected by the main control unit 7 in the above-mentioned step S6. . The selection method differs between the fixed mode and the variable mode described below. In the video signal reproducing device 10, whether to perform high-speed reproduction in the fixed mode or the variable mode is determined by the remote controller 5 via the operation input processing unit 6.
Is selected according to the operation input signal from.

Here, the fixed mode refers to a mode in which high-speed reproduction processing is fixed to one of the patterns. For example, only the A pattern, only the B pattern, or C
Only the pattern is used, and the pattern for performing the high-speed reproduction process is selected by an operation input signal from the remote controller 5. Therefore, in this fixed mode, the user can arbitrarily change the display pattern during high-speed reproduction by operating the remote controller 5.

In the fixed mode, since the additional information is not reflected, the processing in steps S5 and S7 is not required. However, even in this fixed mode, it is possible to perform control reflecting the additional information.
For example, when the genre information is reproduced in step S5, it is only necessary to determine in step S7 which of the patterns A to C is to be used to start high-speed reproduction according to the genre. Thereby, the video signal reproducing device 1
In the case of 0, high-speed reproduction starts with an optimal setting according to the genre, and thereafter, the pattern can be arbitrarily switched by operating the remote controller 5 according to the dynamic visual acuity of the user.

On the other hand, the variable mode refers to a mode in which the high-speed reproduction process is not fixed to any pattern, and the pattern is switched (shifted) as needed according to the additional information.
In this embodiment, the basic setting when the reproduction magnification is 10 times in step S6 is set as the B pattern, and the pattern is sequentially changed in accordance with the additional information in the next step S7. That is, for example, when the amount of motion is large, the pattern shifts from the B pattern to the A pattern in step S7, and when the amount of motion is small, the pattern shifts to the C pattern. The structure of the frame is changed.

Hereinafter, the main controller 7 in the variable mode will be described.
Will be described with reference to a specific example. When the additional information supplied from the additional information reproduction processing unit 8 is the amount of motion among the above-described image feature amounts, generally, the video having more motion needs to have a larger number of read frames in order to grasp the content. Therefore, when the value of the motion amount is large, the main control unit 7 shifts to, for example, the A pattern in order to increase the number of read frames in the above step S7.
When the value of the motion amount is small, control is performed so as to shift to, for example, the C pattern in order to reduce the number of read frames.

Therefore, in this variable mode,
Video having a lot of movement, such as a sports program, is mainly reproduced in the A pattern, and easiness of search can be realized by continuously reproducing images having relatively high correlation. On the other hand, an image such as a weather forecast with almost no motion is reproduced mainly in the C pattern, and the same image is reproduced for 60 frames (2 seconds), thereby reducing the feeling of fatigue during retrieval. Is done.

When the additional information supplied from the additional information reproduction processing unit 8 is scene change information among the above-mentioned image feature amounts, the number of frames read out is generally larger for a video having more scene changes in order to grasp the contents. Needs to be increased. Therefore, when scene change information is supplied, the main control unit 7 controls in step S7 to shift to, for example, the A pattern in order to increase the number of read frames.

Therefore, in the variable mode, an image such as an action movie having a lot of scene changes is mainly reproduced in the A pattern, and the images before and after the scene change are reproduced, thereby facilitating retrieval. Is achieved. On the other hand, an image such as a romance movie with few scene changes is mainly reproduced in the C pattern, and the fatigue at the time of retrieval is reduced as described above.

Further, when the additional information supplied from the additional information reproduction processing section 8 is identification information such as the above-mentioned program contents, genre, presence / absence of character information, presence / absence of music, the main control section 7 The read frame is controlled as follows by referring to the information of

For example, a news program generally has less movement than a sports program and the like, and has many scenes in which character information is inserted. Therefore, in the video signal reproducing apparatus 10, when identification information indicating that the program content is a news program is input to the main control unit 7 via the additional information reproduction processing unit 8, the main control unit 7 In, control is performed so that high-speed reproduction is started with, for example, the C pattern in order to reduce the number of read frames. This allows
In high-speed playback of news programs, the same image
Reproduction over a frame (2 seconds) reduces the feeling of fatigue at the time of retrieval, and produces effects such as the ability to clearly read character information because a still image continues for 2 seconds.

Further, in the variable mode, the main control section 7 performs control by reflecting the identification information in the movement amount of the image feature amount and the like. For example, even with the same amount of motion, for example, the motion scene of a sports program is often more important than the motion scene of a news program. Therefore, when identification information indicating that the video signal is a sports program is input, the main control unit 7 controls so as to relatively increase the number of read frames with respect to the amount of motion.

In the variable mode described above, the number of display frames is different from each other for the A pattern, the B pattern, and the C pattern, and the product of the number of read frames is made equal to each other, so that the reproduction magnification is constant.

On the other hand, the video signal reproducing device 10
In addition, it is possible to change and display the reproduction magnification according to the content of the additional information during high-speed reproduction (hereinafter, referred to as a variable magnification mode). In this variable magnification mode, the minimum value is set while making the reading interval variable, and the number of display frames is set to a constant value. To shorten the search time as a whole. In this case, the minimum magnification during high-speed reproduction is determined by determining the minimum value of the read interval.

The variable magnification mode can be easily realized by, for example, changing only the display frame numbers of the A pattern, the B pattern, and the C pattern from the state of the variable mode to be equal to each other.

Hereinafter, a setting example of the variable magnification mode will be described with reference to FIG. In this example, the number of display frames is set to 15, which is the same as that of the pattern A, and the minimum value of the reading interval is set to 150 frames, which is the same as that of the pattern A, so that the minimum magnification at the time of high-speed reproduction is 10 times. Is set to

Here, as shown in FIG. 4A, a case will be described in which a video signal for 2400 frames (80 seconds) is reproduced at a high speed in the variable magnification mode. Also,
In order to facilitate understanding, FIGS. 4B and 4D show the case of a fixed reproduction magnification of 10 × by the pattern A shown in FIGS. 3B and 3E, respectively, and show a variable magnification mode. FIG. 4C and FIG. 4E show an example in the case of high-speed reproduction in.

The control method of the main control unit 7 when the additional information supplied from the additional information reproduction processing unit 8 is a motion amount among the above-mentioned image feature amounts will be described. Is the scene change information of the image feature amount, or the identification information such as the program content, genre, presence / absence of character information, presence / absence of music, etc., can be realized by similar control.

In the variable magnification mode, as shown on the left side of FIG. 4C, for example, when additional information indicating that the amount of motion is large is input, the state of the A pattern shown in FIG. 4B, the video signals A ₁ , B ₁ , C ₁ ,
D ₁ and E ₁ are read by the video signal reading unit 2. Then, in this state, as shown in FIG. 4E, the reproduction is performed at the minimum magnification of 10 × speed.

In the variable magnification mode, FIG.
As shown in the approximate center of (C), when additional information indicating that the amount of motion is medium is detected, the video signal is read out in the state of the B pattern shown in FIG.
The video signals G ₁ , F ₁ and I ₁ are read at 00 frame intervals, and the video signals F ₁ and H ₁ are not read. As a result, since the number of reproduced images (the number of frames) is set to 15, as shown in the approximate center of FIG.

Further, in the variable magnification mode, FIG.
(C) As shown on the right side, when additional information indicating that the amount of motion is small is detected, the video signal is read out as shown in FIG.
The state of the C pattern shown in (D) is reached, and the video signal M ₁ is read out at 600 frame intervals, and the video signals J ₁ ,
K ₁ and L ₁ are not read. Therefore, in this case, as shown on the right side of FIG.

To summarize the above processing, the reproduction time, which took 8 seconds when the speed was fixed at 10 × speed, was reduced to 4 seconds as a result, and the same search time as when the reproduction was performed at 20 × speed was required. Moreover, in this case, the interval for reading out a portion of the video signal having a large amount of motion is narrowed, and the interval for reading out a portion of a small amount of motion is widened. Will be.
Therefore, the easiness of the search is remarkably improved as compared with the case of the simple 20 × speed in which the interval for reading the video signal is fixed.

FIG. 5 shows a second embodiment of the present invention. In the second embodiment of the present invention, a video signal reproducing device 10A includes a video signal reading unit 2 and an intermittent signal processing unit 1
1, an output signal processing unit 4, an operation input processing unit 6, a main control unit 7A, an additional information reproduction processing unit 8,
An additional information detection processing unit 13 is provided.

The video signal reproducing apparatus 10A operates based on an operation input from the remote controller 5, similarly to the video signal reproducing apparatus 10 described above. Note that the portions denoted by the same reference numerals as those of the video signal reproducing device 10 described above have the same configuration as the video signal reproducing device 10, and a detailed description thereof will be omitted.

The video signal reproducing apparatus 10A has the same functions as the video signal reproducing apparatus 10, and has additional information when the video signal reading section 2 intermittently reads the video signal from the recording medium 1 during high-speed reproduction. The detection of the additional information by the detection processing unit 13 allows the video signal to be output more quickly. That is,
The additional information detection processing unit 13 detects the above-described additional information supplied when the video signal reading unit 2 intermittently reads the video signal. The additional information detected by the additional information detection processing unit 13 is used for control during high-speed reproduction by being input to the main control unit 7A.

The intermittent signal processing section 11 performs a process of reproducing the video signal read by the video signal reading section 2 in the same manner as the video signal reproduction processing section 3 in the video signal reproducing apparatus 10 described above. If necessary, analog / digital conversion processing is performed, and if image compression processing such as MPEG is performed, expansion processing is performed. Intermittent signal processing unit 11
Supplies the video signal that has undergone such a reproduction process to the output signal processing unit 4 during normal reproduction.

On the other hand, the intermittent signal processing section 11 once writes the video signal subjected to such reproduction processing to the memory 12 at the time of high-speed reproduction, and writes the video signal to this memory 12 under the control of the main control section 7A. The video signal is read out for one frame and is supplied to the output signal processing unit 4 repeatedly a predetermined number of times.

That is, in the video signal reproducing apparatus 10A, the additional information included in the video signal intermittently reproduced by the video signal reading unit 2 during high-speed reproduction is detected by the additional information detection processing unit 13 and detected. An image feature amount such as a motion amount is supplied to the main control unit 7A. Then, based on the control signal from the main control unit 7A, the intermittent signal processing unit 11 performs a thinning process in which the image feature amount is reflected when the video signal written in the memory 12 is read.

In this control, the maximum number of frames that can be reproduced at a certain magnification (that is, the minimum interval) is reproduced, and the thinning amount is varied in accordance with the image feature amount. In the video signal reproducing apparatus 10A, the video signal readout unit 2 always reads the video signal from the recording medium 1 according to the pattern A described in FIG. 3B, and the video signal reproduced intermittently by the intermittent signal processing unit 11. Is written to the memory 12. Then, the intermittent signal processing unit 11 normally performs the thinning processing so as to form the B pattern, and the additional information detection processing unit 13
May be switched to the A pattern or the C pattern in accordance with the additional information detected by.

[0070]

As described in detail above, according to the video signal reproducing apparatus of the present invention, the read interval of the video signal reading means and the intermittent signal processing means are controlled in accordance with the reproduced or detected additional information. By controlling the number of repetitions of outputting the image, each image read at a predetermined interval by the video signal reading means is displayed for a certain period of time during high-speed reproduction, and high-speed reproduction processing according to the content of the video signal is performed. Will be

Therefore, according to the video signal reproducing apparatus,
The stress of the searcher caused by the rapid reproduction of images having low correlation is alleviated, the searchability is improved, the fatigue and discomfort during the search are reduced, and the high-speed reproduction is further enhanced. It is possible to increase the magnification.

Further, according to the video signal reproducing method of the present invention, high-speed reproduction is achieved by controlling the frame interval for reading the video signal and the number of repetitions for outputting the intermittent signal in accordance with the reproduced or detected additional information. At this time, images read from the recording medium at predetermined intervals are displayed for a certain period of time, respectively, and high-speed reproduction processing according to the contents of the video signal is performed.

Therefore, according to the video signal reproducing method,
It is possible to reduce the stress on the searcher caused by the images having a low correlation being rapidly reproduced one after another, thereby improving searchability and reducing fatigue and discomfort at the time of search.

[Brief description of the drawings]

FIG. 1 is a block circuit diagram illustrating a configuration of a video signal reproducing device according to a first embodiment of the present invention.

FIG. 2 is a flowchart illustrating a control operation of a main control unit of the video signal reproducing device.

FIG. 3 is a diagram illustrating a high-speed reproduction process of the apparatus.

FIG. 4 is a diagram for explaining a high-speed reproduction process of the apparatus.

FIG. 5 is a block circuit diagram illustrating a configuration of a video signal reproducing device according to a second embodiment of the present invention.

[Explanation of symbols]

10, 10A video signal reproducing device, 1 recording medium, 2
Video signal readout section, 3 video signal reproduction processing section, 4 output signal processing section, 6 operation input processing section, 7, 7A main control section, 8
Additional information reproduction processing unit, 11 intermittent signal processing unit, 12
Memory, 13 additional information detection processing unit

Claims (10)

[Claims] 1. An additional information reproducing means for reproducing additional information relating to the contents of a video signal recorded together with a video signal on a recording medium, and reproducing the video signal from the recording medium at a higher speed than a normal reproduction speed. Video signal reading means for intermittently outputting the video signal at predetermined frame intervals according to the reproduction speed as a read-out intermittent signal; and intermittent signal processing means for repeatedly outputting the output intermittent signal for one frame a predetermined number of times. And control means for controlling the interval between frames read by the video signal reading means and the number of repetitions for outputting the intermittent signal of the intermittent signal processing means in accordance with the additional information reproduced by the additional information reproducing means. A video signal reproducing device characterized by the above-mentioned. 2. The video signal reproducing apparatus according to claim 1, wherein said additional information reproducing means reproduces additional information indicating an amount of motion of a video recorded together with said video signal on said recording medium. 3. The control means according to claim 2, wherein said control means controls to reduce the interval between frames read by said video signal reading means as the amount of motion of the video indicated by the additional information reproduced by said additional information reproducing means increases. 3. The video signal reproducing device according to claim 2, wherein: 4. The intermittent signal processing unit according to claim 4, wherein the control unit decreases the number of repetitions of outputting the intermittent signal as the motion amount of the video indicated by the additional information reproduced by the additional information reproducing unit increases. 4. The video signal reproducing device according to claim 3, wherein the video signal is controlled. 5. When reproducing a video signal from a recording medium at a higher speed than a normal reproduction speed, the video signal and additional information relating to the content of the video signal recorded together with the video signal are transmitted at predetermined frame intervals corresponding to the reproduction speed. Video signal reading means for intermittently outputting as a read intermittent signal, additional information detecting means for detecting the additional information from the intermittent signal output from the video signal reading means, and intermittent output from the video signal reading means. A storage means for storing a signal; an intermittent signal processing means for repeatedly reading the intermittent signal for one frame from the storage means a predetermined number of times; and a new intermittent signal processing means from the storage means according to the detected additional information. The interval between frames from which the intermittent signal is read out and the number of times the intermittent signal for one frame is repeatedly read out from the storage means. Video signal reproducing apparatus characterized by comprising a control means for controlling and. 6. An additional information relating to the content of the video signal recorded together with the video signal is reproduced from a recording medium, and when reproducing the video signal from the recording medium at a higher speed than a normal reproduction speed, the video signal is reproduced. The intermittent signal is read out intermittently at predetermined frame intervals according to the speed and the reproduced additional information and output as an intermittent signal, and the output intermittent signal for one frame is repeated a predetermined number of times according to the reproduced additional information. A video signal reproduction method characterized by outputting the video signal. 7. The video signal reproducing method according to claim 6, wherein additional information indicating an amount of motion of the video recorded together with the video signal is reproduced from the recording medium. 8. The intermittent signal which is output as an intermittent signal in which the frame interval of the intermittently read video signal is narrowed as the amount of motion of the video indicated by the reproduced additional information increases. Video signal playback method. 9. The apparatus according to claim 8, wherein, as the amount of motion of the video indicated by the reproduced additional information increases, the number of repetitions of the output intermittent signal for one frame is reduced and output. Video signal playback method. 10. When a video signal is reproduced from a recording medium at a speed higher than a normal reproduction speed, additional information relating to the video signal and the contents of the video signal recorded together with the video signal is provided at predetermined frame intervals corresponding to the reproduction speed. The intermittent signal is output as an intermittent signal, the output intermittent signal is stored, the additional information is detected from the output intermittent signal, and the intermittent signal for one stored frame is added to the intermittent signal. A video signal reproducing method comprising: repeatedly reading out a predetermined number of times according to information; and outputting the readout at frame intervals according to the additional information.