Matsushita Electric Industrial Co., Ltd.

Panasonic Intellectual Property Management Co., Ltd.

Nobuyuki Enoki

Mitsuaki Morita

Masaya Miyazaki

Tokuo Nakatani

Masaya Yamamoto

Toshiyuki Fukushima

Kazuhiro Mochinaga

Takenori Maehashi

Shinichi Saeki

Kiyoshi Owada

Akira Takuma

A content recording apparatus includes an obtaining unit which obtains a content having a variable-length packet structure, an encrypter which generates encrypted data by encrypting the content, and a recorder which records the encrypted data in a block unit having a fixed length in a recording medium. The encrypted data includes an invalidated region unnecessary for reproduction of the content. The recorder records a size of the invalidated region in the recording medium.

Content recording apparatus, content editing apparatus, content reproduction apparatus, content recording method, content editing method, and content reproduction method

An method for simultaneously writing a data stream onto a recording medium with a low writing and reading rate such as an optical disk and outputting a data stream stored on the recording medium. In the method, an inputted data stream is retained by the first buffer. The stream held in the first buffer is written on the recording medium. The stream recorded on the recording medium is read onto the second buffer to output the stream to an external device. The writing and the reading are controlled based on the duration to consume the stream held on the second buffer, so that the writing and reading are real-time.

Data output apparatus

An apparatus for simultaneously writing a data stream onto a recording medium with a low writing and reading rate such as an optical disk and outputting a data stream stored on the recording medium. In the apparatus, the first buffer retains an inputted data stream. The stream held in the first buffer is written on the recording medium. The stream recorded on the recording medium is read onto the second buffer to output the stream to an external device. The writing and the reading are controlled based on the duration to consume the stream held on the second buffer, so that the writing and reading are real-time.

Apparatus for simultaneously writing and outputting data stream

During video editing, video data is recorded in continuous areas of at least a predetermined length on an optical disc to ensure that the display of video images is uninterrupted. A first segment, out of a plurality of segments recorded on an optical disc, whose consecutive area on the optical disc is shorter than the predetermined length is detected. Re-encoded data that is to be reproduced either immediately before or immediately after the detected first segment is recorded next to the first segment. If the combined continuous area of the first segment and the re-encoded data is still below a predetermined length, the segment that is to be reproduced on the other side of the re-encoded data to the first segment is recorded on the optical disc so as to be positioned on the other side of the re-encoded data, thereby increasing the continuous length of the recording area beyond the predetermined length.

Video data editing apparatus and computer-readable recording medium storing an editing program

A multimedia data reproduction apparatus comprising an optical disk library containing a plurality of optical disks and a plurality of optical disk drives, a file management unit for managing names of motion picture files stored in the respective optical disks, a media management unit for managing whether each of the optical disks is being used or not, a drive management unit for managing whether each of the optical disk drives is being used or not, an open processing unit for deciding whether to accept a request to start reading or reject it according to information from the file management unit, media management unit and the drive management unit, a close processing unit for performing close processing of a motion picture file for which a request to end reading is issued, a data readout control unit for reading motion picture data in response to the request to start reading, and a network control unit for controlling communication between the above-mentioned units and terminal PCs 20. In this apparatus, it is possible to continuously reproduce motion pictures from the optical disk library.

Apparatus for reproducing multimedia data, method for reproducing

A virtual file management system constructed with a plurality of servers and a plurality of terminals that share file services provided by said servers, is that a virtual file management apparatus operating in at least one of said plurality of servers is provided that has: a management table which manages files stored on said plurality of servers by using virtual file identifiers, and in which a server name of a server where real data is stored and a real file identifier in said server are stored as a set for each of said virtual file identifiers; a receiving section which receives a file access request from each of said terminals; a request analyzing section which checks said management table by using the virtual file identifier contained in the file access request received by said receiving section, and thereby determines the server where the real data of the requested file is stored; a transmitting section which transmits data; and a request modification processing section which modifies said file access request so that a response to said file access request can be sent back to the terminal that issued said access request, directly from the server determined by said request analyzing section, and which instructs said transmitting section to transmit said modified file access request to said determined server, and

Virtual file management system

A control unit for a computer system regulates the removal of power from the computer system when a user's power off signal is received in correlation with a process control table monitoring those programs in use in a volatile memory. The volatile memory is supplemented with a temporary storing means for reserving certain types of computer programs when the computer system is turned off. The status of a program is determined upon receiving a power off signal and a decision is made on the storage of the program in a temporary storage memory of limited space.

Apparatus and method for suspending and resuming software applications

The control unit of a computer system comprises a first storing device for holding written data while the power is on, a second storing device for holding the written data, even when the power is off and a power-off preserving device for terminating power to the system after transferring the data held in the first storing device to the second storing device. The control system can be utilized to only store the effective contents of the operating data to thereby enable data reconstruction upon resumption of power. The control device can interface with a window system processing device which can enable the refreshing of graphic display information upon resumption of power. The second storing device may have limited memory capacity and the operator can be informed of its capacity prior to a final shut-off of power. The control unit can further identify those programs that are not capable of being restored to their original condition and accordingly canceling any program execution when such a condition is judged.

Apparatus and method for suspending and resuming software application on

There is disclosed a control unit of a computer system comprising a volatile storing device for holding written data while the power is on, a non-volatile storing device for holding the written data even when the power is off, and a power-off preserving device for powering off after transferring the data held in the volatile storing device to the non-volatile storing device. The control unit of the computer system further comprising a power-on resuming device for returning the data held in the non-volatile storing device to the volatile storing device. There is also disclosed a control unit of a computer system comprising a non-resumable condition judging device for judging whether the status of the computer system meets the process non resumable condition or not when the powering off operation is directed, and a non-resumable condition informing device for informing the user that the status has been judged to meet the condition.

Apparatus and method for suspending and resuming software on a computer

A control unit of a computer system comprising a process resuming device for resuming the execution of the program it was running before the powering off operation by resuming the previous contents stored in a memory device containing registers in CPU, registers in input/output control units, and a volatile memory there were before the powering off operation, a non-resumable condition judging device for judging whether the status of the computer system meets the substantially non-resumable condition or not even the stored contents in the storing device has returned to the previous status at the powering back on, and either one of a program execution control device for restarting the execution of a program from the beginning at the powering back on according to the judged results by the non-resumable condition judging device, or a power control unit for powering off after the process has been judged to be in the substantially resumable status by the non-resumable condition judging device. There is also disclosed a construction in which programs loaded by a volatile memory are preserved to a storing device capable of holding data even when the power is off according to the executing status. There is also disclosed a construction in which data exceeding the capacity of the storing device is preserved to a hard disk or the like.

Growing community of inventors

Osaka, Japan

Nobuyuki Enoki