摘要:
A picture signal encoding of a predictive encoding type. The encoding process is performed so that a summation between a quantized error of codes respectively representing at least two slots in one of N (N is an integer greater than 1) quantizing patterns, for current value data and a quantized error to be obtained when next value data is coded according to at least two quantizing patterns.
摘要:
In an electronic apparatus control system provided with: a plurality of electronic apparatuses connected to a network covering a predetermined area; and a controller for controlling these electronic apparatuses, the controller (11) is provided with: a generating device for generating a group key peculiar to the network (18) in order to encrypt the information flowing through the network (18); and a wireless unit (21) for transmitting the generated group key to a plurality of the electronic apparatuses. The electronic apparatus is provided with: a memory device for storing the group key transmitted; an encrypting device for encrypting the information flowing through the network (18) using the group key; and a decoding device for decoding the encrypted information using the group key. Owing to this construction, it is possible to present a copy protection improved in the maintainability and reduced in the cost, for protecting copyright effectively even in a case that information is flown out of the network (18).
摘要:
An object of the present invention is to provide an electronic watermark embedding apparatus, an electronic watermark embedding method, a record medium having an electronic watermark capable of securely detecting the watermark in the case of performing the noise reduction process or data compression process to the information on the contents and a manufacturing method of record medium. The electronic watermark embedding apparatus is provided with an embedding device for embedding an electronic watermark comprised of a signal generated based on a predetermined rule into contents comprised of digital information; a variation device for varying intensity of the electronic watermark to be embedded into the contents; and a controlling device for controlling the variation device so as to change the intensity of the electronic watermark, and wherein the controlling device for controlling the variation means so as to increase the intensity of the electronic watermark at intervals are provided.
摘要:
An apparatus for generating a recording signal by converting an image signal and outputting the generated recording signal to an external device is provided. The image signal included image data corresponding to an image to be displayed on a display. The image data includes a plurality of data pieces each corresponding to a different one of a plurality of image elements which compose the image. The apparatus includes: a control information placing device for placing a control information piece onto one of the plurality of data pieces corresponding to one of the plurality of image elements that is to be located at an outer edge portion of the image when the image is displayed on the display screen; and a generating device for generating the recording signal including the control information piece. The control information piece includes information to control an operation of the external device.
摘要:
There is provided an information record medium on which information is recorded so as to permit, even when a reading-out error occurs, subsequent reproduction, an apparatus for recording the same and an apparatus for reproducing the same. According to the recording apparatus of the present invention, there are recorded, on the information record medium of the present invention, data groups provided with data units having at least one of video information and audio information, and reproduction control information having the first identification information for identifying each data group; and the second identification information for identifying the data group to which each data unit belongs, is recorded in each data unit. According to the reproduction apparatus of the present invention, when there is selected a data group comprising data units, there are consecutively read out the first identification information for identifying the selected data group and the second identification information for identifying the data group recorded in the data unit, to which the data unit belongs, and there is reproduced information of the data unit having the second identification information identical with the first identification information.
摘要:
A watermark information embedding method, and apparatus, capable of suppressing the quality degradation of contents and increasing the survivability of embedded information. When embedding watermark information in moving picture data formed of a plurality of still picture frames arranged in time series, a motion vector representing a property specific to moving picture is detected for each of image blocks generated by dividing a target frame. According to a motion quantity, a pixel change factor specifying rule is selected for each block. Out of pixels permitted to be changed in luminance depending upon the state of an image in each block representing a property specific to still picture, as many pixels as a number specified by the selected rule are selected. Luminance change processing for forming watermark information is conducted on the selected pixels.
摘要:
An apparatus for reading record information from a recording disk and outputting the read record information in order to reproduce the record information recorded on the recording disk, is provided. The record information includes: image information which represents an image or a picture; identification information which represents any one of at least never copy and copy free. The never copy indicates that copying of the record information is prohibited. The copy free indicates that the copying of the record information is permitted. The apparatus comprises: a read device for reading the record information from the recording disk; a first determination device for determining whether the identification information included in the read record information indicates the never copy or the copy free; a second determination device for determining whether the recording disk is a recording disk of a recordable type or a recording disk of a read-only type; an output control device for determining on the basis of determinations of the first determination device and the second determination device whether outputting the read record information is permitted or prohibited; and an output device for outputting the read record information in accordance with a determination of the output control device.
摘要:
An apparatus for superposing a digital watermark for superposing digital watermark information on an information data signal bearing original information superposes digital watermark information on an information data signal bearing original information, for each unit block consisting of a group of pieces of information data. This apparatus is provided with an auxiliary embedding circuit 10 of or embedding second digital watermark information in the information data; a blocking circuit 12 for dividing into the unit blocks the changed information data signal obtained by the auxiliary embedding circuit; and a main embedding circuit 20 for embedding first digital watermark information in the changed information data signal for each of the divided blocks. The second digital watermark information bears information for identifying the position of the divided unit block in a predetermined section of the information data signal. On the basis of the second watermark information, a detecting apparatus effects proper blocking with respect to the information data signal with the watermark embedded therein, so as to detect the first watermark information.
摘要:
An information reproducing apparatus has a read device, is capable of reproducing sub picture information and is also capable of performing a highlight display of the sub picture information. In an information record medium to be reproduced by this reproducing apparatus, at least the sub picture information and reproduction control information to control a reproduction of the sub picture information are recorded on the record track such that the sub picture information and the reproduction control information are divided into a plurality of groups. Each of the groups is a predetermined unit able to be accessed by the information reproducing apparatus, and has a sub picture pack in which the sub picture information is contained and a control pack in which the reproduction control information is contained. The reproduction control information includes (i) highlight display control information prescribing at least one of the highlight display of the sub picture information and an operation control corresponding to the sub picture information and (ii) time management information indicating times to manage a start time and an end time respectively of at least one of an effective time period during which the highlight display is effective and an effective time period during which the operation control is effective.
摘要:
An information recording apparatus (SS1) is provided with: a signal process device (72) for dividing record information (R) to be recorded into a plurality of partial record informations including at least video information, for applying a predetermined signal process to each of the partial record informations to thereby output processed partial record information (Sr, 42, 43, 44), and for generating and outputting, on the basis of control information (Si) which is inputted from the external to control a reproduction of the record information, additional information (Sac, 64: PGCI) including still time information (66E) indicative of a time for performing a still picture reproduction of a final picture of each of the partial record informations which is a picture included in each of the partial record informations at a final portion thereof after reproducing each of the partial record informations, at a time of reproducing the record information, the still time information being set for each of the partial record informations; a multiplex device (75, 76) for multiplexing the processed partial record information and the additional information to thereby generate multiplexed processed record information (Sap); and a record device (77, 78) for recording the multiplexed processed record information onto an information record medium (1: DVD).