JP2002199366A - Device and method for reproducing data - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sufficiently protect a copyright even in the device level of a reproducing means such as a monitor and a loud speaker or a device driver level. SOLUTION: When encoded picture data 35 with a user ID is received from a data supply source device 30, a CPU/chip set/memory 51 transfers a picture to a picture output device 54, analyzed watermark information, compares the user ID obtained from watermark information with the user ID which is previously set in the device level such as a data reproducing device 50, the monitor 59 or the loudspeaker 58, performs decoding with the user ID as a key when a condition required for reproduction is satisfied and, then, displays a decoded picture. Unless the condition required for reproduction is satisfied, display and a voice output are not performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a data reproducing apparatus and a data reproducing method for reproducing data such as video and audio provided from a data supply apparatus.

[0002]

2. Description of the Related Art As a conventional video signal receiving and reproducing apparatus, for example, there is an apparatus disclosed in Japanese Patent Application Laid-Open No. 11-27647. This apparatus provides a video signal receiving / reproducing apparatus having high security for preventing unauthorized decryption / reproduction, illegal copying, and illegal distribution of received data on the receiving side for movie screening by a video distribution system.

In this conventional video signal receiving / reproducing apparatus, data transmitted from a transmitting station is subjected to encryption processing and digital watermark information addition unique to each video signal receiving / reproducing apparatus.
For decryption, the video signal receiving / reproducing device and the transmitting station are separately connected by a telephone line or the like, and authentication, decryption key information, and digital watermark invalidation information are exchanged, and decryption / reproduction processing is performed based on the information. .

On the other hand, on the receiving side, reception, decryption, invalidation of digital watermark, and decryption processing are performed by a display function (projector).
In order to prevent the processing signal from being taken out of the device, the device can be opened only by a predetermined procedure. .

[0005]

However, in the above-mentioned conventional video signal receiving / reproducing apparatus, whether or not the entire video signal receiving / reproducing apparatus reproduces is determined based on the encryption in the digital watermark information. In addition, it is possible to reproduce at a device level or a device driver level of reproducing means such as a plurality of monitors or speakers, and there is a problem that copyright protection at a device level or a device driver level is insufficient. Was.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has been made in view of a data reproducing method capable of sufficiently protecting a copyright even at a device level or a device driver level of reproducing means such as a monitor and a speaker. It is an object to provide an apparatus and a data reproducing method.

[0007]

According to the present invention, there is provided a data reproducing apparatus having a reproducing means for receiving transmitted data and reproducing the received data. The identification information for each of the reproduction means is added, and the identification information for each of the reproduction means is set in the reproduction means, and the identification information included in the received data and the reproduction information are set in the reproduction means. A reproduction control unit that outputs the data to the reproduction unit and reproduces the data when a condition necessary for reproduction of the data is satisfied, based on the identification information. .

[0008] The data is encoded data, and the reproduction control means decodes and outputs the data when outputting the data to the reproduction means. .

Further, the data is characterized in that identification information for each of the reproducing means is added as watermark information.

The reproduction control means deletes the data if the conditions necessary for reproducing the data are not satisfied.

In a data reproducing method for providing image data from a data supplying device to a data reproducing device and reproducing the image data by the data reproducing device, the data supplying device should provide the data reproducing device with the data reproducing device. Transmitting a thumbnail image of the image data, the data reproduction device receiving the thumbnail image from the data supply device,
A request for image data based on the received thumbnail image,
Transmitting the identification information of the reproduction means of the data reproduction apparatus to the data supply apparatus, and the data supply apparatus,
When receiving the request for image data and the identification information of the reproducing means of the data reproducing apparatus from the data reproducing apparatus, the image data with the identifying information of the reproducing means of the data reproducing apparatus is transmitted to the data reproducing apparatus, When the data reproducing device receives the image data, the data reproducing device determines based on the identification information included in the image data and the identification information set in the reproducing means of the data reproducing device, and Is reproduced.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a block diagram of a data reproducing apparatus 50 and the like according to the first embodiment of the present invention. In FIG. 1, reference numeral 51 denotes system management;
A CPU / chipset / memory that also functions as a reproduction control unit for performing calculations and the like;
D and 53 are other devices, 54 is an image output device that outputs image data, 55 is an audio output device that outputs audio data, 56 is a network input / output device that inputs and outputs information to and from an external network, and 57 is a CPU / A local bus connecting the chipset / memory 51 and each device, 58 is a speaker as a reproducing means for outputting sound, and 59 is a monitor as a reproducing means for displaying an image. I have.
Reference numeral 30 denotes a data supply device, and reference numeral 40 denotes an external network such as the Internet or an intranet.

Next, the operation will be described. FIG. 2 is a flowchart showing a process up to data reproduction using an example of image display according to the first embodiment of the present invention. First, the data supply device 30 transmits a thumbnail image, which is a small image serving as a sample of an image, to the data reproduction device 50 via the external network 40 (step 100). In the data reproducing device 50, the CPU / chipset / memory 51 receives the data via the network input / output device 56 and the local bus 57, and stores it in the HDD 52 or transfers it to the image output device 54, and displays the thumbnail image on the monitor 59. (Step 200).

Then, the user of the data reproducing device 50
When a real image to be transmitted from the data supply device 30 is specified with reference to the thumbnail image on the monitor 59, the CPU / chipset / memory 51 sends an image request of the real image corresponding to the thumbnail image to the data supply device 30. It is sent to the user (step 300).

When the data supply device 30 receives an image request for a real image from the data reproduction device 50, it requests the data reproduction device 50 for a user ID (step 40).
0).

In the data reproducing apparatus 50, upon receiving a request for a user ID from the data supply apparatus 30, the CPU / chipset / memory 51 transmits a device 59 such as a monitor 59 or a speaker 58 for reproducing the image on the apparatus. A level and a user ID set in advance for the device driver level are transmitted to the data supply source device 30 (step 500). That is, when presenting the user ID, if there are a plurality of monitors 59, speakers 58, and the like in the present apparatus and there is a playback device that is not used for playing back the image, the user ID of the playback device should not be transmitted. I do.

Here, the user ID is an ID managed by the data supply device 30 to identify the device of the data reproducing device 50 of each user and its device driver.
Or a managed ID set by the user of the data reproducing apparatus 50 at the device level such as the monitor 59 or the speaker 58 or the device driver level in the unit of an individual unit or a company; 58 and the device driver of the data reproducing apparatus 50, such as a product number, a lot number, an ID number, and a user ID set from the product shipping stage or the like, as long as they can identify the device and the device driver. Good.

Upon receiving the user ID from the data reproducing device 50, the data supply device 30 adds the user ID to the encoded image data to be transmitted as watermark information or the like, and converts the encoded image data with the user ID into data. The data is transmitted to the reproducing device 50 (step 600). If the data source device 30 and the data reproducing device 50 know in advance that a user ID is necessary for reproducing data, the data reproducing device 50
The user ID may be presented in step 600 together with the image request, and the user ID request process in step 500 by the data supply device 30 may not be necessary. If the user ID of the device to be used or its device driver is recognized in advance, the user ID request processing of step 500 and the user ID presentation processing of step 600 are not required, and the image request of step 400 is not required. Then, the transmission of the image with the user ID in step 600 may be performed.

Then, in the data reproducing apparatus 50, if the CPU / chipset / memory 51 receives the encoded image data 35 with the user ID and performs the processing shown in FIG. The image data with the user ID is displayed on the monitor 59 as a display device via the image output device 54 (step 700).

Incidentally, even when the data supply device 30 transmits image data with audio data or only audio data to the data reproducing device 50, the data reproducing device 50 performs the same operation as the above-described image data. It is determined whether or not the user ID added to the audio data transmitted from the data supply device 30 and transmitted matches the user ID of the vice in the audio reproduction of the speaker 59 or the like. In such a case, only the audio data may be reproduced via the audio output device 55 or together with the image data.

FIG. 3 is a flow chart showing a process at the time of information reproduction using the image display of step 700 in FIG. 2 as an example. When the CPU / chipset / memory 51 receives the encoded image data 35 with the user ID from the data supply device 30, the CPU / chipset / memory 51 transfers the image to the image output device 54 (step 710), and outputs the watermark information and the like. The user ID in the data reproduction device 50 is analyzed by analyzing the user ID in the storage device (step 720).
9 and a user ID preset at a device level such as the speaker 58 (step 730). If the conditions necessary for reproduction are satisfied (step 730)
"Yes"), after decoding using the user ID as a key, image display of the decoded image is performed (step 740).

On the other hand, if the conditions required for reproduction are not satisfied (step 730 "No"), the display is not displayed (step 750). It should be noted that the same processing is performed for the audio output to the speaker 58 so that the audio output or the audio output is not performed.

As described above, according to the first embodiment,
Since the reproduction of data is controlled by comparing the user ID at the device level or device driver level of the monitor 59 and the speaker 58, the copyright is also protected at the device level and device driver level of the reproduction means such as the monitor and the speaker. Can be adequately protected. Of course, the same applies to projectors and other data reproducing devices.

In particular, when one data reproducing apparatus has a plurality of devices such as monitors and speakers, data reproduction control is performed at a device level or a device driver level of reproducing means such as monitors and speakers. Therefore, data can be reproduced only by devices such as monitors and speakers permitted on the data supply source device 30 side. Even if one data reproducing device has a plurality of devices such as monitors and speakers, it is possible to reproduce data. Rights can be sufficiently protected.

Embodiment 2 Next, a data reproducing apparatus according to a second embodiment of the present invention will be described. The configuration itself of the data reproducing apparatus according to the second embodiment is the same as that of the first embodiment shown in FIG. 1, and the operation is performed until the data reproducing apparatus 50 receives the encoded image data 35 with the user ID. Therefore, the subsequent operation, that is, the information reproducing process shown in step 700 of FIG. 2 will be described.

FIG. 4 is a flowchart showing a process at the time of information reproduction using the image display of step 700 as an example in the second embodiment of the present invention. CPU / Chipset / Memory 51
When the coded image data 35 with the user ID is received from the data supply device 30, the image is transferred to the image output device 54 (step 710), and the user ID in the watermark information is analyzed ( Step 72
0), the user ID obtained from the watermark information is compared with the user ID preset at the device level of the data reproducing apparatus 50, its monitor 59, the speaker 58, etc. (step 730) to satisfy the conditions necessary for reproduction. If yes (step 730 “Yes”), after decoding using the user ID as a key, the image display of the decoded image is performed (step 740). Up to this point, the operation is the same as in the first embodiment.

On the other hand, if the conditions required for reproduction are not satisfied (“No” in step 730), in the second embodiment, the information of the image is deleted (step 745).
It is not displayed (step 750). It should be noted that the same processing is performed for the audio output to the speaker 58 so that the audio output or the audio output is not performed.

As described above, according to the second embodiment,
As in the case of the first embodiment, the user ID is compared at the device level or the device driver level of the monitor 59, the speaker 58, and the like, and the data playback control is performed. Copyright can be sufficiently protected even at the device level or device driver level, and the copyright can be sufficiently protected even when one data playback device has multiple devices such as monitors and speakers. Becomes possible.

In the second embodiment, when the conditions necessary for reproduction are not satisfied, the information is erased, so that further protection of the information can be realized.

[0030]

As described above, according to the present invention, judgment is made based on the identification information included in the received data and the identification information set in the reproducing means, and the condition required for reproducing the data is satisfied. In such a case, the received data is output to the reproducing means and reproduced, so that the copyright can be sufficiently protected even at the reproducing means such as a monitor or a speaker or its driver level.

When the conditions necessary for reproduction are not satisfied, the information is erased, so that further protection of the information can be realized.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a data reproducing apparatus according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing a process up to data reproduction taking an example of image display according to the first embodiment of the present invention;

FIG. 3 is step 7 in the first embodiment of the present invention.
9 is a flowchart showing a process at the time of information reproduction using an image display of 00 as an example.

FIG. 4 is a view showing a step 7 in the embodiment 2 of the present invention;
9 is a flowchart showing a process at the time of information reproduction using an image display of 00 as an example.

[Explanation of symbols]

30 data supply device, 40 external network, 5
0 data playback device, 51 CPU / chipset / memory (playback control means), 52 HDD, 53 other devices, 54 image output device, 55 audio output device, 56 network input / output device, 57 local bus, 58 speaker (playback) Means), 59 monitors (reproduction means).

Claims (5)

[Claims] 1. A data reproducing apparatus having a reproducing means for receiving transmitted data and reproducing the received data, wherein the data has identification information for each of the reproducing means added thereto. Identification information for each of the playback means is set in the playback means, and the determination is made based on the identification information included in the received data and the identification information set in the playback means,
A data reproducing apparatus comprising: a reproduction control unit that outputs the data to the reproduction unit and reproduces the data when a condition necessary for reproduction of the data is satisfied. 2. The data reproducing apparatus according to claim 1, wherein said data is encoded data, and said reproduction control means, when outputting said data to said reproduction means, transmits said data to said reproduction means. A data reproducing device for decoding and outputting. 3. The data reproducing apparatus according to claim 1, wherein identification information for each of the reproducing means is added to the data as watermark information. 4. The data reproducing apparatus according to claim 1, wherein said reproduction control means, when the condition required for reproducing the data is not satisfied, transmits the data. A data reproducing device characterized by erasing. 5. A data reproduction method for providing image data from a data supply device to a data reproduction device and reproducing the image data by the data reproduction device, wherein the data supply device should provide the data reproduction device. A thumbnail image of the image data is transmitted, the data reproduction device receives the thumbnail image from the data supply device, a request for image data based on the received thumbnail image, and identification information of reproduction means of the data reproduction device. Is transmitted to the data supply device. When the data supply device receives a request for image data from the data reproduction device and identification information of reproduction means of the data reproduction device, the data reproduction device reproduces the data. Transmitting image data with identification information of the means to the data reproducing apparatus, wherein the data reproducing apparatus When receiving, the image data is reproduced based on the identification information included in the image data and the identification information set in the reproducing means of the data reproducing apparatus. Playback method.