JP3918940B2 - Recording medium playback device - Google Patents

Description

The present invention relates to a recording medium playback apparatus such as a DVD player that plays back images and sounds.

Some DVDs (Digital Versatile Discs) have a function called parental lock. This is a function that cuts out scenes that you don't want to show to your children, or automatically replaces them with other materials that you have prepared in advance to play seamlessly. For example, extreme violence and a love scene can be replaced with a safe scene as if it were such a work from the beginning.

The viewing restriction level can be set up to 8 levels in order to correspond to the system of each country in the world and is used according to the rules of each country. Which video is to be reproduced at the stage of use is set in advance on the DVD side.

When the parent sees the original scene, it is possible to call the setting screen by pressing a hidden button such as a remote control or by simultaneously pressing a plurality of buttons, and play by entering a password. The password at that time can be set or changed on the hardware side.

Since this parental lock is based on what is pre-registered in the DVD, the user has no choice but to accept the viewing restriction level set by the DVD producer. However, in most cases, the producer side does not set a viewing restriction level low or places a viewing restriction for reasons such as a sales strategy. Due to this circumstance, the idea of restricting viewing on a DVD with a predetermined content does not substantially function.

Therefore, Patent Document 1 proposes a recording medium playback device that can set a viewing restriction level suitable for a viewing restriction scene by its own judgment using the parental lock described above. In Patent Document 2, a viewing restriction level can be set corresponding to the title and label of a DVD.
JP 2001-43630 A JP 2000-287155 A

However, in Japanese Patent Laid-Open No. 2004-228688, a portion that is subject to viewing restrictions is written in advance on the disc and cannot be changed. Also, it cannot be applied to a disc for which no parental lock is set. In Patent Document 2, since viewing restrictions are set in units of DVD titles or labels, they must be set for each individual software (including titles or labels).

It is an object of the present invention to provide a recording medium playback apparatus that can easily set viewing restrictions by setting viewing restrictions based on the frequency domain of audio data.

In order to achieve the above object, the present invention provides a recording medium reproducing apparatus for reproducing a recording medium on which image data and audio data are recorded, a storage unit for storing a predetermined frequency, and an attempt to output the recording medium.
If audio data contains audio or the predetermined frequency, characterized by comprising a control section view limited so as not to output the image data corresponding to the audio data and voice data.

Note that the control unit may output a predetermined message instead of the audio data of the recording medium having the predetermined frequency or higher and the image data corresponding to the audio data.

Moreover, since the frequency that a person can hear is up to 15 kHz and normal conversation is less than 1 kHz, the predetermined frequency is preferably 2 kHz.

According to the present invention, in a recording medium reproducing apparatus capable of reproducing a DVD, an EEPROM for storing a predetermined frequency, and audio data to be output include audio of the predetermined frequency or higher.
If you are, instead of the image data corresponding to the audio data and voice data, and a control unit that controls to output a predetermined message, said predetermined frequency, characterized in that it is set to 2kHz .

According to the present invention, by restricting viewing based on the frequency of audio, it is possible to restrict viewing even on a disc that is not provided with parental lock, and also select a scene that restricts viewing for each individual software You can easily set viewing restrictions without doing so.

FIG. 1 is a block diagram showing the configuration of a DVD player. DVD player 10 is a DV
The CD drive 11 that reads out the image data digitally recorded in D as a data bit stream, and the image data and audio data before compression conversion are restored from the read data bit stream to reproduce the image and sound. Decoder 12, a control unit 13 that controls the operation of the entire DVD player 10, and an EEPR that stores a predetermined frequency as a reference for viewing restriction
An OM 14, a remote controller 15 for a user to input an operation instruction to the DVD player 10,
The light receiving circuit 16 inputs an operation instruction using an infrared blinking signal from the remote controller 15 and an operation panel 17 capable of executing the same operation instruction on the DVD player 10 side.

This CD drive 11 amplifies a servo signal processing unit 19 that drives the optical pickup 18 to a predetermined position by sending a control signal to a focus servo (not shown) and the like, and a read signal from the optical pickup 18 An RF amplifier 20 that generates a predetermined control signal, and a CD signal processing unit 21 that restores digital data recorded from the amplified signal, converts it into a data bit stream, and outputs the data bit stream. Yes.

Then, they operate mutually under the control of the control unit 13, and the data bit stream recorded on the DVD can be output to the decoder 12. The decoder 12 separates the data bit stream into a video component and an audio component and performs MPEG demodulation, and restores the video signal and the audio signal while outputting them in synchronization.

A control circuit for controlling an external device is provided in the control unit 13 as well as a CPU that is a main body of arithmetic processing, a ROM that stores a predetermined control program, a RAM that is used as a work area, and the like. Is provided. As described above, the CD drive 11 and the decoder 12 reproduce images and sounds under the control of the control unit 13.

Further, the operation panel 17 connected to the control unit 13 is provided with a plurality of keys, and a level adjustment key 17b for raising and lowering a frequency value to be restricted for viewing and a viewing value set to the level-adjusted value. A restriction setting key 17b and an ON / OFF key 17c for switching whether to enable the set viewing restriction are provided.

When a desired frequency is selected by the level adjustment key 17 a and the viewing restriction setting key 17 b is pressed, the control unit 13 stores the frequency in the EEPROM 14. And ON
If the / OFF key 17c is ON, the scene having the frequency stored in the EEPROM 14 is not reproduced, and if it is OFF, the scene is reproduced normally. The frequency to be restricted for viewing may be selected by increasing or decreasing the numerical value of the frequency by the level adjustment key 17a, or may be selected from several levels. The frequency that humans can hear is up to 15 kHz, and normal conversation is less than 1 kHz. Therefore, the setting value of the frequency for limiting viewing can be set to 2 kHz, for example.

Such various keys are also provided on the remote controller 15 and configure the same function by operation. Further, these operation contents may be displayed on a display or screen on which an image is reproduced by an OSD circuit (not shown) to prompt the user to perform the operation.

Further, a numeric keypad (not shown) may be provided on the operation panel 17 or the remote controller 15. Thereby, a numerical value can be directly input when inputting the frequency. The ON / OFF key 17
You may make it request | require the input of the password for enabling operation of c. Also ON
The / OFF key 17c may be a dip switch on the back of the main body.

FIG. 2 is a flowchart showing an outline of the reproduction process of the DVD player 10. When the user instructs playback of the DVD, first, in step S10, the ON / OFF key 17c.
Is read, and the process proceeds to step S11 to determine ON or OFF.

If it is ON in step S11, the process proceeds to step S12 and the EEPROM 14
The frequency related to viewing restriction is read out from step S13 and the process proceeds to step S13. On the other hand, step S11
If it is OFF, the process proceeds to step S16 to perform normal reproduction.

The process proceeds from step S12 to step S13 to acquire a predetermined amount of DVD data (image data, audio data, subtitle data), and the process proceeds to step S14 where the audio data has a frequency equal to or higher than the predetermined frequency (eg, 2 kHz) read in step S12. It is determined whether or not sound is included.

In step S14, when the audio | voice more than a predetermined frequency is contained, it progresses to step S15 and a viewing restriction process is performed. On the other hand, if no sound of a predetermined frequency or higher is included in step S14, the process proceeds to step S16 to perform normal reproduction. After step S15 and step S16, the process returns to step S13 to acquire the next DVD data.

In the viewing restriction process in step S15, the control unit 13 can perform control so as not to output the DVD image and sound, or can fast-forward the corresponding scene. At that time, a message such as “locking” may be displayed on the connected display.

By performing the determination in step S14 on a cell-by-cell basis, it is possible to limit viewing only for scenes where viewing is desired to be limited. In addition, when the determination is made in a unit larger than the cell, it is possible to restrict viewing including a scene before and after including a predetermined frequency.

In this way, by restricting viewing based on the audio frequency, it is possible to restrict viewing even on a disc that is not provided with parental lock, and without selecting a scene that restricts viewing for each individual disc. But you can easily set viewing restrictions.

The recording medium playback apparatus of the present invention can be used for an apparatus for playing back images and sounds, such as an optical disk playback apparatus such as a DVD player, a video tape player, and a hard disk recorder.

It is a block diagram which shows the structure of the DVD player of this invention. It is a flowchart which shows the outline | summary of the reproduction | regeneration processing of the DVD player of this invention.

Explanation of symbols

10 DVD player (recording medium playback device)
13 Control unit 14 EEPROM

Claims (4)

In a recording medium reproducing apparatus capable of reproducing a DVD,
An EEPROM for storing a predetermined frequency;
If the audio data to be output contains a voice over the predetermined frequency, instead of the image data corresponding to the audio data and voice data, and a control unit that controls to output a predetermined message Prepared,
The recording medium reproducing apparatus, wherein the predetermined frequency is set to 2 kHz. In a recording medium reproducing apparatus for reproducing a recording medium on which image data and audio data are recorded,
A storage unit for storing a predetermined frequency;
If the audio data to be output contains a voice over the predetermined frequency, characterized by comprising a control section view limited so as not to output the image data corresponding to the audio data and voice data A recording medium playback apparatus. 3. The recording medium reproducing apparatus according to claim 2, wherein the control unit outputs a predetermined message instead of the audio data of the predetermined frequency or higher and the image data corresponding to the audio data. . 4. The recording medium reproducing apparatus according to claim 2, wherein the predetermined frequency is 2 kHz.

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