JP2007202037A - Recording reproduction device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recording reproduction device by which a user can easily retrieve a desired point. <P>SOLUTION: A recording reproduction device of the present invention is provided with a recording rate changing means changing a recording rate depending on presence/absence of a variation of a video signal, and a chapter setting means setting a chapter at a time when the recording rate is changed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a recording / reproducing apparatus capable of recording and reproducing video information.

By detecting the video change by the network camera, the resolution and compression rate of the video to be distributed can be changed and the high-quality video can be sent at the same time, and the information can be added to the receiving side, so that the recording device on the receiving side can also be in high-quality mode. An apparatus capable of recording by switching to is known.
JP 2005-268996 A

  However, the conventional apparatus can record for a long time by switching the image quality mode, but there is no means for searching for a place where the video signal has changed during playback, so that a desired place cannot be easily searched. There was a point.

  An object of this invention is to provide the recording / reproducing apparatus with which a user can search easily a desired location.

In order to achieve the above object, a recording / reproducing apparatus of the present invention includes a camera for imaging a video signal,
Detecting means for detecting the presence or absence of a change in the video signal from the video signal by the camera;
Recording rate changing means for changing the recording rate of the video signal in accordance with the presence or absence of a change in the video signal by the detecting means;
And a chapter setting means for setting a chapter at a time when the recording rate of the video signal is changed by the recording rate changing means.

Further, the recording rate changing means, when there is no change in the video signal, to record at a predetermined recording rate,
When the change of the video signal is detected by the detection unit, recording is performed by changing to a recording rate higher than the predetermined recording rate.

  Further, the chapter setting means sets the chapter at a time before a predetermined time from a time when recording is started at a recording rate at which the recording rate of the video signal is higher than the predetermined recording rate.

  In addition, information indicating that the chapter is set is added to the video signal in which the chapter is set by the chapter setting means.

  According to the present invention, the user can easily search for a desired location from the video signal.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a schematic block diagram of a recording / reproducing apparatus 10 having an embodiment according to the present invention. FIG. 2 is a flowchart showing the operation procedure of the recording rate setting process of the recording / reproducing apparatus 10 of FIG. FIG. 3 is a conceptual diagram showing the relationship between the apparatus configuration in the embodiment and the video signal from the camera 30. FIG. 4 is a conceptual diagram showing the relationship between the recording rate and the chapter division points.

  As shown in FIG. 3B, the recording / reproducing apparatus 10 in FIG. 1 is connected to a camera 30 and a monitor 40. The subject is photographed by the camera 30, and the photographed video signal is taken into the recording / reproducing apparatus 10 and displayed on the monitor 40. As shown in FIG. 3A, the video signal is sequentially displayed on the monitor 40 from the left side of the paper to the right side of the paper in order of shooting time. However, the subject moves on the right side of the paper, and this causes a change in the video signal. Indicates that In the present embodiment, a change in the video signal in FIG. 3A is detected.

  The recording / reproducing apparatus 10 will be described with reference to FIGS. As shown in FIG. 1, the recording / reproducing apparatus 10 includes a video processing unit 11, a video change detection unit 12, a video compression processing unit 13, a video compression mode control unit 14, a recording mode control unit 15, a recording unit 16, and a video output unit. 17, an OSD (on-screen display) 18, a CPU 19, and an operation unit 20. The recording / reproducing apparatus 10 can view the video obtained by the camera 30 on the monitor 40 by the operation of the CPU 19.

  When the camera 30 connected to the recording / reproducing apparatus 10 starts photographing the subject, the CPU 19 controls the video processing unit 11 to convert the video signal obtained by the camera 30 into the video compression processing unit 13 and the video change detection unit. 11 (step S501). The video change detection unit 12 checks, for example, the amount of change at a plurality of points in the video signal. If the amount of change or the changed portion is larger than a preset value, the video change is present. As a result, it is checked whether or not a video change has been detected (step S502). The video compression processing mode control unit 14 has a table 601 for setting a video compression mode corresponding to the presence / absence of a video change as shown in FIG. 5 in advance. A command is sent to the processing mode control unit 14, and the recording rate by the video compression processing unit 13 is switched to a high image quality mode in which the recording rate is higher than when there is no video change so that the video compression processing unit 13 performs high image quality processing. This is performed (step S503). If no video change is detected in step S502, image quality processing is performed with the recording rate kept at a low image quality mode (step S504). As shown in the relationship between the elapsed time of the video signal of the subject by the camera 30 and the recording rate by the recording / reproducing apparatus 10 as shown in FIG. 4, these processes increase the recording rate when recording is detected. Then, when there is no change in the image (from the right side of FIG. 3A to the left side of the paper again), the recording rate is lowered. Then, the video data from the video compression processing unit 13 is sent to the recording unit 16 (for example, HDD, DVD) and recorded.

  Further, as shown in FIG. 4, separately from the video data, the recording mode control unit 15 displays the chapter division information (elapsed time and the recording position information of the video data at the recording unit 16) at the recording rate change point. The data is added and recorded in the recording unit 16 (step S505). As a result, as shown in FIG. 4, chapters can be set at the changing points of the video signal.

  As mentioned above, since the chapter can be set at the position where the video change is detected and the recording rate is changed, the user can immediately see where the video has changed, but how this part changes. If it can be seen, it is more convenient for the user. This can be realized, for example, by setting a chapter at a time before a preset time from the point at which the change in the image in FIG. 4 is detected. To set a chapter at this position, the video compression mode control unit 14 instructs the video compression processing unit 13 to switch to a high image quality mode with a high recording rate, and the video compression processing unit 13 records at a high recording rate. A chapter is set at an elapsed time before a preset time from the elapsed time at which the operation is started. Specifically, the position information of the video data recorded in the recording unit 16 corresponding to the time is recorded in the recording unit 16 as a chapter. Thereby, since the user can continuously check the changed part before the time when the image changes, it is easy to check the change of the image.

  Further, as shown in FIG. 6, when a plurality of video signals are recorded by the recording / reproducing apparatus 10 and a plurality of titles are generated, the above-described video change is detected. The recording / reproducing apparatus 10 can add “Yes” after the title name (XXXX), and “No” can be added after the title name of the title for which no change has been detected. This is because, for a title that the video compression mode control unit 14 instructs the video compression processing unit 13 to switch to a high image quality mode with a high recording rate, the CPU 19 adds “Yes” from the character generator (not shown) to the end of the title name. This can be done by instructing it to be attached.

  The recording / reproducing apparatus 10 of the above-described embodiment can be used for the following uses and has the following effects.

(1) Countermeasures such as thieves and vandalism By directing the camera around the house and cars, it can be used as a countermeasure against thieves and vandalism. The chapters are not divided into chapters under normal conditions, but the chapters are divided by the time specified by the user from the video part where the recorded video has changed, such as thieves and vandalism. Without skipping chapters, you can move to the playback scene just before the thief and vandalism are recorded.

(2) Wildlife monitoring By installing a camera in a forest, etc., it can be used for wildlife ecology research. The chapter is not divided into chapters in the normal state, but the chapters are divided by the time specified by the user from the video part where the recorded video has changed, such as when a wild animal appears. Without skipping chapters, you can move to a playback scene just before the part where wild animals appeared is recorded.

(3) Recording shooting stars By setting the camera facing the sky at night, it can be used for recording shooting stars. The chapter is not divided into chapters in the normal state, but the chapters are divided by the time specified by the user from the video part where the recorded video has changed, such as a shooting star flowing, so the user does not check all of the playback By skipping chapters, you can move to the playback scene just before the part where the shooting star was recorded.

  The present invention has the following effects.

1. Since only the portion where the video has changed is recorded at a high recording rate and is normally recorded at a low rate, it is possible to record for a long time with respect to a limited recording disk capacity. By adding a function capable of reproducing only a portion with a high recording rate, it is possible to reproduce only a portion where the video has changed. In addition, it is possible to view a video before detecting a change in the video.

  2. By adding a specific name or symbol to a title or chapter divided every few hours in regular recording, the user can immediately determine which one has detected a change in video. By adding a function of playing back only those to which a specific name or symbol is added, it is possible to play back only the portion where the video has changed.

1 is a schematic configuration diagram of a recording / reproducing apparatus according to an embodiment of the present invention. 6 is a flowchart showing an operation procedure of recording rate setting processing according to the embodiment. FIG. 2 is a conceptual diagram showing a relationship between a device configuration according to the embodiment and a video signal from a camera 30. The conceptual diagram which showed the relationship between the recording rate in connection with the embodiment, and a chapter division | segmentation point. The table which sets the image | video compression mode corresponding to the presence or absence of the image | video change concerning the embodiment. 6 is a screen example of a title list according to the embodiment.

Explanation of symbols

10 Recording / playback device
12 Image change detector
14 Video compression mode controller
15 Recording mode controller
30 cameras
40 monitors
601 tables

Claims (4)

A camera for imaging a video signal;
Detecting means for detecting the presence or absence of a change in the video signal from the video signal by the camera;
Recording rate changing means for changing the recording rate of the video signal in accordance with the presence or absence of a change in the video signal by the detecting means;
And a chapter setting means for setting a chapter at a time when the recording rate of the video signal is changed by the recording rate changing means. The recording rate changing means, when there is no change in the video signal, recorded at a predetermined recording rate,
2. The recording / reproducing apparatus according to claim 1, wherein when the video signal is changed by the detecting means, the recording is changed to a recording rate higher than the predetermined recording rate.   3. The chapter setting unit sets the chapter at a time that is a predetermined time before a time when recording is started at a recording rate at which the recording rate of the video signal is higher than the predetermined recording rate. Recording and playback device.   3. The recording / reproducing apparatus according to claim 2, wherein information indicating that the chapter is set is added to the video signal in which the chapter is set by the chapter setting means.

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