Abstract: A content playback apparatus includes an SKF selecting unit that selects one segment key file from plural segment key files recorded in a DVD media at a time of playback of a content of the sequence key section, a data selecting unit that selects each content corresponding to a segment number of each key entry registered in the selected segment key file, a moving picture data decrypting unit that decrypts the selected moving picture data by a segment key corresponding to the segment number, and a decoder that plays back the decrypted moving picture data.

Abstract: According to one embodiment, a firmware protection method applied to an electronic apparatus comprising a chip of a processor, wherein the processor stores external unique information and chip unique information that is assigned uniquely to the chip, the firmware protection method comprising: transferring a firmware to the electronic apparatus, the firmware subjected to an encryption and a tampering check data addition by using information that is identical with the external unique information; performing a tampering check and a decryption of the firmware by using the external unique information stored in the chip; performing an encryption of the firmware and an addition of a tampering check data to the firmware by using the chip unique information; and storing the firmware in a predetermined storage.

Abstract: According to one embodiment, since key information is written after a drive unit and host unit are assembled into a player, it is not necessary to manage, in the assembled player, the correspondence in secret key information between the drive unit and host unit. Further, in the player, even if, for example, the drive unit must be exchanged for another, encrypted key data can be shared simply by writing another key data item.

Abstract: According to one embodiment, a playback apparatus includes a unit which determines whether a value of a pointer included in each of video object units read out of a storage media is larger than the total number of hash values in a content hash table stored in the storage media, a unit which computes a hash value of a video object unit selected at a given probability from among the video object units read out of the storage media and determines whether the computed hash value coincides with a hash value stored in a hash entry indicated by a pointer included in the selected video object unit, and a unit which stops playing back digital content when the value of the pointer is larger than the total number of hash values or when the computed hash value does not coincide with the hash value stored in the hash entry.

Abstract: An information editing apparatus comprises a reproducing unit configured to reproduce audio-video information, a boundary detecting unit configured to analyze the audio-video information reproduced by the reproducing unit and detect a boundary point in the audio-video information, a chapter division specifying unit configured to specify chapter division according to the input of chapter division operation during the reproduction of the audio-video information by the reproducing unit, and a chapter setting unit configured to correct a chapter division point corresponding to the timing of specifying chapter division on the basis of the boundary point in the audio-video information detected before or after the timing of specifying chapter division at the chapter division specifying unit and set the corrected chapter division point.

Abstract: A wireless AV station is furnished with an Internet browsing function, a TV viewing function, a TV recording and playback function and a message board function, and these multiple functions are activated by a command from a plurality of personal computers each operating as remote controllers, and/or a dedicated remote controller. A control portion executes exclusive control among multiple functions based on exclusive control data, so that concurrently available functions may be used independently by a plurality of remote controllers.

Abstract: On receiving a fast-forward playback instruction from a remote-control manager, a system controller determines whether the fast-forward playback speed is equal to or higher than a predetermined speed and whether the display screen should be divided into sections. If it determines that the display screen should be divided, the system controller determines how many sections the screen should be divided into, in accordance with the fast-forward playback speed. The system controller informs a GUI manager that the display screen should be divided into sections, the number of which has been determined.

Abstract: There is disclosed a digital information system which has a digital contents protection function using WM information. The system uses the WM information during a first ripping processing to execute a first verification processing for verifying validity regarding use of contents. In this case, ID information of music contents as a ripping object is registered. The system uses the ID information to execute a second verification processing for verifying the validity regarding the use of the contents without executing the first verification processing using the WM information during the ripping processing of the music contents corresponding to the registered ID information.

Abstract: A recording and reproducing apparatus has a tuner unit channel-selects and decodes a broadcast signal and outputs picture information, a recording unit records the picture information, a reservation image recording management unit stores given day of the week information, time information, channel selection information, and continuous mode information for repeatedly carrying out reservation image recording with respect to these items of information and handling image recording information as a series of information, and which controls the tuner unit and the recording unit based on these items of information, thereby carrying out reservation image recording, and a library generating unit generates display information to display an image as a unit of management information even with respect to management information for plural rounds of image recording information when management information for the image recording information recorded on the continuous mode information is displayed as library information.

Abstract: A videophone device for transmitting/receiving an image and voice to/from another device through a network, includes a voice input unit configured to input voice data, an image input unit configured to input image data, a text data generating unit configured to generate text data while at least one of the image data and the voice data is being input, a synthesizing unit configured to synthesize the voice data, the image data and the text data to obtain data, and a communication unit configured to transmit the data obtained by the synthesizing unit.

Abstract: A wireless AV station is furnished with an Internet browsing function, a TV viewing function, a TV recording and playback function and a message board function, and these multiple functions are activated by a command from a plurality of personal computers each operating as remote controllers, and/or a dedicated remote controller. A control portion executes exclusive control among multiple functions based on exclusive control data, so that concurrently available functions may be used independently by a plurality of remote controllers.

Abstract: There is disclosed a digital information system which has a digital contents protection function using WM information. The system uses the WM information during a first ripping processing to execute a first verification processing for verifying validity regarding use of contents. In this case, ID information of music contents as a ripping object is registered. The system uses the ID information to execute a second verification processing for verifying the validity regarding the use of the contents without executing the first verification processing using the WM information during the ripping processing of the music contents corresponding to the registered ID information.

Abstract: An electronic device determines, upon receiving an acquisition request of license data necessary for installing the software or executing a specific function of the software, whether or not license data is issued by referring to management data indicating issue status of license data, stored in a secret area in the electronic device and controls permission or inhibition of issuing the license data stored in the secret area in the electronic device based on the determination result.