Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Mitsuhiro Sato

Naohiko Noguchi

Takashi Shimojima

Hiroyuki Suzuki

Hayashi Ito

Yuji Kanno

Hideki Yasukawa

Mitsuaki Inaba

Yoshio Fukushige

Shinichi Matsui

Masako Nomoto

Kaoru Murase

Shunji Harada

Yasuo Takeuchi

Ryuji Inoue

Masato Ishikawa

Yoshihiro Noguchi

Masamoto Tanabiki

Kazuya Fujimura

Masaki Kiyono

Masaki Hoshida

Emi Tsurukiri

Norio Nakamura

Kiichi Hasegawa

With content management apparatusserving as a copy origin and storage mediumas a copy target, the copy origin retains allowed copy count control information on content, and when the content is copied from the copy origin to the copy target, the allowed copy count control information retained at the copy origin before copy processing is updated in accordance with a predetermined rule to generate allowed copy count control information to be retained at the copy origin and allowed copy count control information to be retained at the copy target, and subsequent copy processing at the copy origin is done based on the allowed copy count control information retained at the copy origin, whereas subsequent copy processing on the content stored in storage mediumis done based on the allowed copy count control information stored in storage medium. In this way, it is possible to achieve content management which is easily understandable for users.

Content management method and content management apparatus

A secure device capable of reducing influences by interruptions of communication with an external device and allowing a user to install a desired application program speedily and safely. Command storage section () of this secure device () stores command groups for executing card issuance. Card issuance section () extracts a series of card issuance commands corresponding to a function of a card to be acquired from the command group stored in command storage section () and writes the commands into a buffer of card management section (), Card management section () executes each card issuance command written by card issuance section (). Card issuance is completed through internal processing of secure device ().

Secure device and system for issuing IC cards

A recording apparatus is provided for an SD memory card that has a plurality of EPUBxxx.KEY files recorded thereon, each file having a plurality of Key&Rule Entry areas, and an SD_EPUB.MMG file being read from the recording medium prior to the writing of data. A bitmap in SD_EPUB.MMG shows for each EPUBxxx.KEY file whether the EPUBxxx.KEY file has at least one Key&Rule Entry area not in use, or whether all the Key&Rule Entry areas are in use. Based on the bitmap in the read SD_EPUB.MMG file, the recording apparatus opens EPUB#u.KEY having an unused Key&Rule Entry area and writes data into the unused Key&Rule Entry area in the file. If all the Key&Rule Entry areas in EPUB#u.KEY become in use as a result of the writing of the data, the recording apparatus updates the bitmap in SD_EPUB.MMG.

Recording apparatus, medium, method, and related computer program

A package management information recording sectioncreates and records on a recording mediumpackage management information for managing packages recorded on the recording medium. A content file recording sectionrecords on the recording mediumcontent files of content file groups included in packages, and also creates and records on the recording mediumcontent file group management information for managing these content file groups. A content/metadata correspondence information recording sectioncreates and records on the recording mediuminformation on correspondence between content files and metadata files within a package or correspondence between a package itself and metadata files. By this means, the correspondence between content files and metadata files can always be maintained correctly when they are recorded separately.

File management method, content recording/playback apparatus and content recording program

A package management information recording sectioncreates a directory for each package for content distributed in package units, and creates a package management file indicating the relationship between a directory name and package identifier. A content file recording sectioncreates a content file group management file indicating the relationship between a content file name and a reference name when that content is linked from other content. A link resolution information recording sectioncreates a link resolution file indicating the correspondence between a reference name indicating content included in another package and the package identifier of the other package. A link resolution sectionof a content playback apparatusspecifies a link destination content file using these items of file management information. By this means, a link between contents can be maintained even when distributed content is recorded with a name different from the original content file name.

File management method and content recording/playback apparatus

In a document retrieving apparatus, an audio input section converts a sound into a character pattern. A language model storing section stores likelihood information. A word choosing section obtains a word selection result based on the likelihood information. A retrieval condition producing section produces retrieval conditions based on the word selection result. A document storing section stores document to be retrieved. And, a document retrieving section retrieves the documents based on the retrieval conditions. An effective document search can be performed regardless of the sentence recognition accuracy without requiring higher cost in collecting the required language data.

Document retrieving apparatus and document retrieving method

The document retrieval unit retrieves documents in a set of retrieval object documents stored in the memory unit according to the entered retrieval condition such as retrieval word, sequences each document depending on the goodness of fit to the retrieval condition, and issues the retrieval result by shuffling the documents in the sequence by occurrence. The occurrence distribution calculating unit calculates the occurrence distribution of retrieval conditions from this sequenced retrieval results and the table of sets of sample documents stored in the memory unit. The retrieval history storage unit stores the entered retrieval condition, the sequenced retrieval result from the document retrieval unit, and the occurrence distribution of retrieval conditions calculated by the occurrence distribution calculating unit in the memory unit as retrieval history. The retrieval history processing unit graphically processes the retrieval history stored in this memory unit, and calculates the occurrence distribution of retrieval condition in each set of sample document, so that the user can easily judge the validity of the retrieval condition and the effect of the retrieval condition on the retrieval result.

Document retrieval having retrieval conditions that shuffles documents in a sequence of occurrence

A searching apparatus includes an index generation portion for generating an index to provide data of the number of documents including the key word and the number of appearances of the key word. Matching degrees between the key word and documents are calculated from the number of documents including the key word and the number of appearances of the key word. A portion of documents are arranged in order of the matching degree in a buffer which are outputted as the searching result. Lower rank documents regarding the matching degree are searched by comparing the lowest matching degree of the neighbour higher ranked document arranged in the buffer. At first time searching, data of the latest edition of the documents stored in a memory is detected and stored and is used to provide second time searching operation to eliminate inconsistency in the searching result between the editions at first and second time searching operations. The index is generated every field of each document. The matching degree of combined field is calculated by logical operation between the two fields. Moreover, an index of combined field may be generated and one of field of the combined field may be omitted. The matching degree of the other field is also obtained by another logical operation.

Document searching apparatus

A system for providing keywords to facilitate a search in a text retrieval system. For each of texts constituting a text base, the system creates a word ID of each of words used in the text and a word occurrence count of a corresponding word. The word occurrence count indicates a number of occurrences of a word in each text. For each of words used in any of the texts constituting the text base, the system creates a total word occurrence count and a containing text count indicative of the number of texts containing the word. For each of words contained in the selected texts, a degree of importance is calculated by using the word occurrence count, the total word occurrence count and the containing text count. The words contained in the selected texts are sorted in order of the degree of importance. At least a part of the sorted words are displayed as related keywords.

Keyword extracting system and text retrieval system using the same

A document retrieval system for searching a document coinciding with a retrieval request the user inputs and further ranking the document in accordance with the degree of coincidence between the document and the retrieval request. In the document retrieval system, a word frequency calculating section finds out the number of documents where a word appears, a frequency of occurrence of the word in a document and obtains a weighting parameter for the word, and a frequency score calculating section obtains a frequency score on the basis of the output of the word frequency calculating section. In addition, a word cooccurrence relation checking section checks word cooccurrence relations of the retrieval request and the document, and a cooccurrence score calculating section calculates a cooccurrence score from the degree of coincidence therebetween. A document score calculating section calculates a document score on the basis of the frequency score and the cooccurrence score. The documents are ranked in order of document score and displayed to the user.

Document retrieval system

A hypertext document and anchor sentences of parent documents for the hypertext document are registered with an hypertext document identifier as document information for each of hypertext documents having reference relationships with each other. A user can refer to one hypertext document according to an anchor sentence of another hypertext document functioning as a parent document. Also, occurrence positions of one word in hypertext documents and parent documents are registered as word information for each of words. When a keyword is input, a plurality of particular hypertext documents and particular parent documents in which the keyword appears are specified according to the word information, one particular hypertext document and corresponding particular parent documents are unified to a unified hypertext document for each particular hypertext document, an occurrence frequency of the keyword in each unified hypertext document is calculated according to the document information, importance degrees of the unified hypertext documents are calculated as those of the particular hypertext documents according to the occurrence frequencies, and ranking of the particular hypertext documents are determined according to those importance degrees. Because the occurrence frequency is calculated by considering the parent documents, the particular hypertext documents can be appropriately ranked.

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Atsugi, Japan

Mitsuhiro Sato