摘要:
An editing apparatus and method for dividing or combining a data file(s) that is segmented into blocks of a predetermined data length and recorded in a non-volatile memory. An attribute file having a predetermined length is modified so as to reflect such dividing or combining. Such attribute file is recorded in the non-volatile memory.
摘要:
An editing apparatus wherein the editing of content is controlled according to its supply source. Identification information for identifying a content supply source is recorded in a recording medium in correspondence with the content supplied from the content supply source and recorded in the recording medium. When editing of the content is requested by a user, the identification information corresponding to that contend is checked. According to the content supply source identified by the identification information, the editing of the content is enabled or disabled.
摘要:
A security unit to prevent unauthorized retrieval of data includes an encrypting unit for encrypting data in accordance with commands received by the security unit, and a common register for storing both intermediate results and final results of the data encryption. A switching element operatively coupled to the register selectively outputs the contents of the register. The switching element is controlled to prevent external access to the intermediate results of the encryption. The security unit is particularly useful as part of a memory unit that is attachable to a recording/reproduction device such as a digital audio recorder/player.
摘要:
A reproducing apparatus for reproducing data from a record medium having a program area and a management area, the program area being used for recording a plurality of files, the management area being used for managing forging prohibition information against a particular file recorded in the program area is disclosed, the apparatus comprising a calculating means for calculating the forging prohibition information managed in the management area of the record medium whenever a file recorded in the recorde medium is reproduced, a comparing means for comparing a value calculated by the calculating means corresponding to a former reproduction command with a value calculated by the calculating means corresponding to a current reproduction command, and a controlling means for permitting the file corresponding to the current reproduction command to be reproduced when the value calculated corresponding to the former reproduction command is the same as the value calculated corresponding to the current reproduction command as the result of the comparing means.
摘要:
A non-volatile recording medium for recording a digital audio signal that has been compressed at a compression rate selectable in a predetermined range and block-segmented in a predetermined data length is disclosed, wherein the predetermined data length of which the digital audio data is block-segmented is decided in consideration of the maximum recordable time and the data length of which the digital audio signal is encrypted.
摘要:
An editing apparatus and method for dividing or combining a data file(s) that is segmented into blocks of a predetermined data length and recorded in a non-volatile memory. An attribute file having a predetermined length is modified so as to reflect such dividing or combining. Such attribute file is recorded in the non-volatile memory.
摘要:
A security unit to prevent unauthorized retrieval of data includes an encrypting unit for encrypting data in accordance with commands received by the security unit, and a common register for storing both intermediate results and final results of the data encryption. A switching element operatively coupled to the register selectively outputs the contents of the register. The switching element is controlled to prevent external access to the intermediate results of the encryption. The security unit is particularly useful as part of a memory unit that is attachable to a recording/reproduction device such as a digital audio recorder/player.
摘要:
A data communication system for distributing music data files between a server and a client removably connected to the server. The system transfers music data files and corresponding management data from a client to a server. The server then determines whether the music data files were previously stored in the server on the basis of the corresponding management data transferred from the client and a management data file in the server. If it is determined that the music data files were previously stored in the server, the music data files transferred from the client are stored into their previous locations in the server. In this manner, the music data files may be repeatedly moved to and from the server and maintain their ordering on the server.
摘要:
A method and apparatus to simplify work to edit sub data by: recording one or a plurality of main data, recording management data for controlling the main data, recording one or a plurality of sub data related to the main data and sub management data for controlling the sub data on a recording medium; and linking the sub data and the sub management data so that they can be referenced from the management data.
摘要:
The present invention is a nonvolatile memory for segmenting one data file that has an attribute file and that is successively reproduced and recording parts of which the blocks are aggregated so that they disperse in the nonvolatile memory, the attribute file having first management information for linking the dispersed parts, the nonvolatile memory having a management area for second management information for linking the dispersed parts.