摘要:
The present invention relates to a method and a device for displaying a sequence of images that makes it possible to prevent any unauthorized copying of the latter. It applies to any type of digital display device comprising a matrix of light cells comprising a number of rows and/or columns of cells greater than the number of rows and/or of columns of pixels of the images to be displayed. According to the invention, to disrupt the illegal copying of sequences of images in cinema auditoria, it is proposed to modify the frame frequency of the displayed images by varying the number of rows and/or columns of cells addressed with a black level for at least two images of the sequence.
摘要:
Additional information embedded in content data can be corrected with reduced load to hardware. A predetermined amount of content data entered is temporarily stored in buffer means, and from the content data temporarily stored in the buffer means, additional information embedded in the content is detected. When the additional information detected indicates that the content data can be recorded, the content data is recorded on a predetermined medium, and when the additional information indicates that recording of the content data is inhibited, no recording is performed onto the medium. Moreover, when correction of the additional information is required, the correction is made on the data stored in the buffer means.
摘要:
A rendering device to render a contents data comprises a reader (3), an information acquisition unit (6) and a controller (1). The reader (3) reads the contents data from a media. The information acquisition unit (6) acquires a copy control information. The controller (1) controls rendering of the contents data while updating the acquired copy control information.
摘要:
An information receiving device receives identification information and encrypted identification information and compares them so as to prevent unauthorized use of contents data. Contents data encrypted by a contents key and the contents key are recorded in a data storage device so as to enable another device to reproduce the contents data, thereby enhancing the versatility. A managing device manages the contents data in the data storage device so as to enable another device to use it. An information control device validates the signature of usable data so as to prevent unauthorized use of the contents data. The contents key and its handling policy, and the contents data encrypted by means of the contents key and contents use license condition information are stored in the data storage device so as to provide the contents data safely. An information recording device can select desired contents data and store it in the data storage device. An information receiving device can prevent use of contents data inhibited to provide and specified in a providing inhibition list.
摘要:
A method and system for incorporating textual and audio material into a JPEG file in a manner allowing both a photograph and the textual material to be stored as one unit and transferred as one unit. The textual materials stored in various photograph tag markers which become part of the JPEG file. The JPEG file including the textual material can be transferred to an authorized user who could edit the file based upon password security. The textual materials can appear around any of the borders of the photographs or can be directly embedded into the photograph.
摘要:
The present invention relates to a read-only disk containing sample data and a reproducing method thereof. According to the present invention, full data is encrypted and recorded on a read-only disk with additional non-encrypted sample data, which is a part of the full data, and navigation data used for searching for the sample data is also recorded on the read-only disk. And, when the encrypted data on the read-only disk is requested to be reproduced, the sample data found with reference to the navigation data is reproduced instead if there is not an authenticated decryption key. Owing to the present invention, a user can confirm easily whether a read-only disk has encrypted contents he or she wants, which will lead to purchase of its decryption key as a natural result.
摘要:
A identification data insertion system for digital data includes a DCT calculator (103) for extracting blocks (102) of 8 x 8 pixels from within a current image (101) and performing DCT (discrete cosine transform) calculation for the blocks (102), a quantizer (104) for quantizing data outputted from the DCT calculator (103), a quantization table (105) for being referred to when the quantizer (104) performs quantization, an electronic watermark data insertion element (107) for inserting electronic watermark data (106) into data after quantization, and an encoder (113) for encoding data outputted from the electronic watermark data insertion element (107) to produce MPEG data (114) in which the electronic watermark data (106) are inserted and outputting the MPEG data (114).
摘要:
The present invention is directed to a duplication controlling method for controlling duplication by inserting duplication-related control information (1,2) into contents comprising digital information. The contents are delivered together with a table containing the change positions of the control information for a predetermined range of the contents and the contents of the control information which varies at each change position.
摘要:
The present invention relates to a device and a method for displaying images. To combat the copying of images by a camcorder in a cinema auditorium, modulating the luminance of the pixels of a pattern around the value to be displayed to a high frequency which makes the pattern invisible to the human eye but which generates artefacts on the sequence filmed by the camcorder is known. According to the invention, it is proposed to temporally modulate the pattern only in the fixed areas (background or indoor scenes) or, where appropriate, the areas with weak movements. Thus, rather than degrading the image in the areas with movement by applying to them the temporal modulation processing, a decision is taken not to temporally modulate the pattern in these critical areas.