JP3858999B2 - Optical disk playback device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an optical disc reproducing apparatus for reproducing video information recorded on an optical disc such as a DVD (Digital Versatile Disc), and more particularly to an optical disc having a system controller that has a screen saver function and also controls the screen saver. The present invention relates to a playback device.
[0002]
[Prior art]
DVDs, which are large-capacity digital data recording media capable of recording video as digital data for a long time, have become widespread. Various information for control, a plurality of video streams, still images other than the main video are recorded on the DVD, and the optical disc playback apparatus selects one of the plurality of video streams when the DVD is played back. A function of causing a user to select one video stream and reproducing the selected video stream, a function of reproducing a still image according to the user's selection, and the like are provided.
[0003]
Selection of a video stream or a still image to be played back is performed by the user operating, for example, a selection acceptance image displayed on a display device connected to the optical disc playback device. Therefore, if the user is unsure of the selection, or if it is left as it is for a long time without making a selection, or if playback is interrupted and left as it is for a long time, the same image is displayed on the display device for a long time. It will be. This increases the possibility that the screen of the display device will cause burning, which is not preferable for the display device.
[0004]
Therefore, in order to prevent such screen burning of the display device, an optical disc adopting a screen saver technology that displays a plurality of still images at a constant time interval when the same image is displayed on the display device for a certain period of time. A reproduction apparatus is known (for example, a video reproduction apparatus disclosed in Patent Document 1).
[0005]
[Patent Document 1]
Japanese Patent Laid-Open No. 2000-50207
[Problems to be solved by the invention]
In such a conventional optical disk reproducing apparatus, when a still image is displayed on a display device for a predetermined time or longer after the optical disk is reproduced, video information is randomly read from the optical disk, and this video information is displayed as a screen saver image. However, if screen saver image information is recorded in advance on the optical disc and a still image is displayed on the display device for a predetermined time or longer, the screen saver image information that has been recorded in advance is read out as a screen saver image. However, in the conventional optical disk reproducing device, when image information for screen saver is recorded on an optical disk, the function of reading out the image information for screen saver and reproducing it as a screen saver image is not provided. In this case, the screen saver image cannot be reproduced, and there arises a problem that the diversity of the screen saver image is inferior.
[0007]
The present invention has been made in order to solve the above-described problems, and at the time of screen saver processing, image information for a screen saver recorded in advance on an optical disc can be displayed as a screen saver image, or randomly read from the optical disc. By allowing video information to be displayed as a screen saver image, an object of the present invention is to provide an optical disk reproducing apparatus capable of preventing screen burn-in of the display device and increasing the variety of screen saver images.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, an optical disc reproducing apparatus of the present invention reads and reproduces at least video information recorded on an optical disc, and generates and outputs a video signal for displaying the reproduced video information. , A key input determining means for determining whether or not there is no key input for a predetermined time after the reproduction of the video information is stopped, and when the key input determining means determines that there is no key input for a predetermined time, Screen saver image presence / absence determination means for determining whether or not there is image information for the screen saver, and when the screen saver image presence / absence determination means determines that there is image information for screen saver, the screen saver image is read out from the optical disc. Screen saver playback to control playback And when the screen saver image presence / absence determining means determines that there is no image information for the screen saver, the video information read out randomly from the optical disc is used as the screen saver image, and the video information read out again at random after a predetermined time is obtained as the screen saver image. Image reproduction control means for performing control to repeat reproduction for a predetermined time, and reproduction position control means for performing control for returning to the original reproduction position and restarting reproduction when there is a key input during reproduction of the screen saver image In the case where the image information for screen saver is recorded in advance on the optical disc, and the reproduction is stopped when the reproduction operation is performed on the optical disc on which the image information for screen saver is recorded, The key input determination means and the scan When the screen saver image is controlled according to the lean saver image presence / absence determining means and the screen saver reproduction control means, and the reproduction is stopped when the reproduction operation is performed on the optical disc on which the image information for the screen saver is not recorded, the key There line control of the screen saver image and the input determination means and the screen saver image presence determining means in accordance with said image reproduction control means, after making the control of the screen saver image and controls the playback restart according to said reproduction position control means.
[0009]
In this configuration, when the video information recorded on the optical disk is reproduced, and then the reproduction is stopped, and it is determined by the key input determination means that there is no key input by the user, the optical disk is then reproduced. The screen saver image presence / absence determining means determines whether there is screen saver image information. When it is determined that there is screen saver image information on the optical disc, the screen saver image information is read out under the control of the screen saver reproduction control means, and the screen saver image is reproduced and displayed on the display device.
[0010]
On the other hand, when it is determined that there is no screen saver image information on the optical disc, video information is randomly read from the optical disc under the control of the image reproduction control means, and a screen saver image is reproduced. Can be switched to. That is, when the data area of the optical disc is randomly accessed, the read still images are different from each other, and after a certain still image is reproduced for a predetermined time, the next different still image is reproduced for a predetermined time. The step of reproducing different still images for a predetermined time is repeated. In this way, different still images are sequentially reproduced as screen saver images and displayed on the display device.
[0011]
In this way, when the screen saver image is displayed on the display device, if there is a key input from the user, the playback position control means controls to return to the original playback position and resume playback. The reproduction is resumed from the position where the reproduction is stopped on the optical disc.
[0012]
According to the optical disc reproducing apparatus having this configuration, it is possible to display screen saver image information recorded in advance on the optical disc as a screen saver image during screen saver processing, or display video information randomly read from the optical disc as a screen saver image. By doing so, it is possible to prevent image burn-in on the screen of the display device, and of course, when a screen saver image is displayed based on screen saver image information recorded in advance on the optical disc, the screen saver image can be changed each time the optical disc changes. In addition, when a screen saver image is displayed based on video information randomly read from the optical disk, the screen saver image can be changed at a predetermined time interval. It is possible to increase the diversity of the screen saver image for saver.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a block diagram showing a configuration of an optical disc reproducing apparatus according to an embodiment of the present invention. In FIG. 1, this optical disk reproducing apparatus rotates an optical disk 1 and an optical pickup 3 that emits laser light and receives reflected light from the optical disk 1 in order to reproduce information recorded on an optical disk 1 such as a DVD. The spindle motor 2, the spindle drive circuit 19 that drives the spindle motor 2, the tracking drive circuit 17 that drives the actuator (not shown) that performs the tracking servo of the optical pickup 3, and the actuator that performs the focus servo of the optical pickup 3 A focus drive circuit 16 that drives (not shown), a sled 4 that moves the optical pickup 3 in the radial direction of the optical disc 1, and a sled drive circuit 18 that drives the sled 4 are provided.
[0019]
The optical disk reproducing apparatus also includes an RF amplifier 5 that inputs a reproduction signal (read signal) from the optical disk 1 when the optical disk 1 is reproduced, generates an RF signal from the reproduction signal, and amplifies the signal, and a VCO (voltage controlled oscillator). And a data / synchronization signal separation circuit 6 that receives an RF signal from the RF amplifier 5 and separates the data from the synchronization signal, and the data separated by the data / synchronization separation circuit 6 Is input and decoded to perform error check, and if there is an error in the data, the data decode error correction circuit 9 that corrects the error and outputs correct data, and correct data is input from the data decode error correction circuit 9 Then, the video signal and the audio signal are decoded and transmitted through the video output terminal 23 and the audio output terminal 24, respectively. For example, an AV decoding circuit 10 for supplying to the TV monitor 22 is provided.
[0020]
In addition, this disk reproducing apparatus includes a mirror detection circuit 7 that detects a mirror signal that is included in an RF signal from the RF amplifier 5 and indicates a mirror surface without a track on the optical disk 1 and counts the mirror surface, and an optical pickup 3. A tracking error detection circuit 11 for detecting a tracking error signal included in the reproduction signal, a focus error detection circuit 12 for detecting a focus error signal included in the reproduction signal from the optical pickup 3, and a tracking from the tracking error detection circuit 11. And a track cross detection circuit 13 for detecting a track cross based on the error signal and outputting a track pulse.
[0021]
In addition, the optical disc playback apparatus is provided with an operation unit 25 having a plurality of keys that are provided on the front surface of the apparatus main body and the like for performing various operations relating to on / off operation of the apparatus power supply and playback. The operation unit 25 includes light receiving means (not shown) that receives an optical signal indicating an operation command from a remote controller (remote controller) 26, and converts the optical signal into an electrical signal by the light receiving means to the system controller 14. Input a command signal. The remote control 26 has a plurality of keys (not shown) for performing on / off operations of the apparatus power supply and various operations relating to reproduction.
[0022]
In addition, the optical disk reproducing apparatus includes a system controller 14 that controls each of the above components according to a CPU 15 that performs processing of the entire apparatus. The system controller 14 performs control for focus servo of the optical pickup 3 based on the focus error signal included in the reproduction signal from the optical pickup 3, and performs optical control based on the tracking error signal included in the reproduction signal from the optical pickup 3. In order to determine the playback position of the optical disk 1 in accordance with the control for tracking servo of the pickup 3 and the playback instruction signal from the operation unit 25 or the remote controller 26, the thread 4 is driven via the thread drive circuit 18 and the optical pickup 3 is A control for moving in the radial direction, a control for rotating the spindle motor 2 via the spindle drive circuit 19 by an operation signal from the operation unit 25 or the remote control 26, a control related to the screen saver, which is a feature of this embodiment, and the like are performed. The system controller 14 is connected to a timer 20 for measuring time and a random number generator 21 for generating random numbers for reading video information from the optical disc 1 at random.
[0023]
The system controller 30 performs control related to the screen saver. Therefore, the key input determination means 27 for determining whether or not there is no key input for a predetermined time after the reproduction of the video information is stopped, and the key input determination means 27 for a predetermined time. When it is determined that there is no key input, the screen saver image presence / absence determining means 28 for determining whether or not there is screen saver image information on the optical disc 1 and the screen saver image presence / absence determining means 28 determine that there is image information for the screen saver. The screen saver reproduction control means 29 for performing control for reading out the screen saver image information from the optical disc 1 and reproducing the screen saver image, and the screen saver image presence / absence determination means 28 determine that there is no image information for the screen saver. When light Image reproduction control means 30 for performing control to repeat reproduction of video information randomly read out from the disk 1 as a screen saver image for a predetermined time and then reproducing video information randomly read out as a screen saver image for a predetermined time, and during the reproduction of the screen saver image Reproduction position control means 31 for performing control for returning to the original reproduction position and resuming reproduction when a key is input.
[0024]
When image information for screen saver is recorded in advance on the optical disc, and the reproduction is stopped when the reproduction operation is performed on the optical disc on which the image information for screen saver is recorded, the key input determination means 27 and the In the case where the screen saver image is controlled according to the screen saver image presence / absence determining means 28 and the screen saver reproduction control means 29, and the reproduction is stopped when the reproduction operation is performed on the optical disc on which the image information for the screen saver is not recorded, The screen saver image is controlled according to the key input determination means 27, the screen saver image presence / absence determination means 28, and the image reproduction control means 30.
[0025]
Next, with reference to the flowchart shown in FIG. 2, the control operation regarding the screen saver in the optical disk reproducing apparatus of this embodiment will be described. When the optical disc 1 is inserted into the optical disc playback apparatus and the video information and audio information of the optical disc 1 are being played back, the playback is stopped by the user operating the playback stop key of the remote control 26, for example (step S1). 20 starts measuring time, and it is determined by the key input determination means 27 whether there is no key input by the user's operation before this time reaches a predetermined time (step S2).
[0026]
Since the still image is displayed on the display device of the TV monitor 22, for example, after the reproduction is stopped, in order to prevent the screen of the display device from being burned, if there is no key input even after a predetermined time, the screen saver processing is started ( Step S3). Then, the screen saver image presence / absence determining means 28 determines whether or not screen saver data (image information) is present on the optical disc 1 (step S4). This determination can be made by reading out TOC (table of contents) information recorded on the optical disc. When the screen saver data is recorded on the optical disc, the TOC information includes information indicating that the screen saver data is recorded.
[0027]
When screen saver data is present on the optical disc 1, the screen pickup operation is performed by the screen saver reproduction control means 29 to seek the optical pickup 3 to the screen saver data area on the optical disc 1 (step S5). The information is read out and the screen saver image is reproduced (step S6) and displayed on the display device of the TV monitor 22. Therefore, the screen of the display device is prevented from being burned.
[0028]
Then, when there is a key input by a user operation during the reproduction (displaying) of the screen saver image, the optical pickup 3 is moved to the original reproduction position by the control of the reproduction position control means 31, and seek is performed. Resume playback from the original playback position. That is, it returns to the original reproduction position and resumes reproduction (step S8).
[0029]
On the other hand, if it is determined in step S4 that there is no screen saver data on the optical disk 1, the optical pickup 3 is randomly sought with respect to the optical disk 1 under the control of the image reproduction control means 30 (step S9). The video information in the data area is read and a still image is reproduced (step S10). That is, the image reproduction control means 30 randomly moves the optical pickup 3 based on the random number generated from the random number generator 21, reads video information from the optical disc 1 at random, and uses this video information as a still image for a screen saver. The information is displayed on the display device of the TV monitor 22.
[0030]
In this way, a still image as a screen saver is displayed on the display device of the TV monitor 22, and when a predetermined time has elapsed (step S11), the video monitor is then read out at random and the video information is used as a still image for the screen saver. It displays on 22 display devices. Accordingly, the screen saver image displayed on the display device is switched at predetermined time intervals, and the screen of the display device is prevented from being burned.
[0031]
Then, when there is a key input by a user operation during the reproduction (displaying) of the screen saver image, the optical pickup 3 is moved to the original reproduction position by the control of the reproduction position control means 31, and seek is performed. Resume playback from the original playback position. That is, it returns to the original reproduction position and resumes reproduction (step S13).
[0032]
In the above embodiment, when no image for screen saver is recorded on the optical disc 1, the video information randomly read from the optical disc 1 is used as a still image for screen saver. However, the screen saver image is not limited to a still image. A moving image may be used as an image for a screen saver.
[0033]
【The invention's effect】
As described above, according to the present invention, the system controller having the key input determination means, the screen saver image presence / absence determination means, the screen saver reproduction control means, the image reproduction control means, and the reproduction position control means is provided, and the image information for the screen saver is provided on the optical disc. Is recorded in advance, and when the reproduction is stopped while the reproduction operation is being performed on the optical disc on which the image information for the screen saver is recorded, the key input determination means, the screen saver image presence / absence determination means, and the screen saver The screen saver image is controlled in accordance with the playback control means, and when the playback is stopped while the playback operation is being performed on the optical disc on which the screen saver image information is not recorded, the key input determination means and the presence or absence of the screen saver image Judgment means and image replay Screen saver image is controlled according to the control means, so screen saver image information recorded in advance on the optical disc can be displayed as a screen saver image during screen saver processing, or video information randomly read from the optical disc can be displayed as a screen saver image By doing so, it is possible not only to prevent the screen of the display device from being burned, but also to increase the diversity of the screen saver image.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of an optical disc playback apparatus according to an embodiment of the present invention.
FIG. 2 is a flowchart for explaining control relating to a screen saver in the optical disc reproducing apparatus according to the embodiment of the present invention;
[Explanation of symbols]
1 optical disk 14 system controller 27 key input determination means 28 screen saver image presence / absence determination means 29 screen saver reproduction control means 30 image reproduction control means 31 reproduction position control means

Claims (2)

In an optical disc playback apparatus that reads and plays back at least video information recorded on an optical disc, and generates and outputs a video signal for displaying the reproduced video information.
Key input determination means for determining whether or not there is no key input for a predetermined time after the reproduction of the video information is stopped;
Screen saver image presence / absence determining means for determining whether or not there is image information for screen saver on the optical disk when it is determined by the key input determining means that there is no key input for a predetermined time;
Screen saver reproduction control means for performing control for reading screen saver image information from the optical disc and reproducing the screen saver image when it is determined by the screen saver image presence / absence judging means that there is image information for screen saver;
When the screen saver image presence / absence determining means determines that there is no screen saver image information, the video information randomly read from the optical disc is played back as a screen saver image for a predetermined time, and then the video information read out again at random is played back as a screen saver image for a predetermined time. Image reproduction control means for performing control to repeat
Comprising a system controller having a reproduction position control means for performing control to restart playback returns to the original reproduction position when the key input is there during the reproduction of the screen saver image,
When image information for a screen saver is recorded in advance on an optical disc, and the reproduction is stopped while the reproduction operation is being performed on the optical disc on which the image information for the screen saver is recorded, the key input determination means and the screen saver Control the screen saver image according to the image presence determination means and the screen saver reproduction control means,
When playback is stopped while performing a playback operation on an optical disc on which no screen saver image information is recorded, a screen saver image is displayed according to the key input determination means, the screen saver image presence / absence determination means, and the image playback control means. There line the control of,
An optical disc reproducing apparatus, wherein after the screen saver image is controlled, the reproduction restart control is performed according to the reproduction position control means . 2. The optical disk reproducing apparatus according to claim 1, wherein the screen saver image according to the image reproduction control means is a moving image .

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