87 results about "Recovery record" patented technology

The file system of a hard disk or optical disc may lose consistency when an unexpected event like a power failure occurs during recording. When recording a data stream, e.g. a video stream, an interruption would lead to a loss of stream data when previously known methods are used, because the file system is not updated. Further, the storage medium may become unusable. Dedicated file system data are put in regular intervals in user data fields of the data stream, providing the possibility to recover an interrupted stream recording. The method can also be used to recover data streams recorded on write-once discs, and it is independent from the used file system.

When data is recorded on an optical disc capable of recording information only once, such as a DVD-R and the like, encrypted data obtained by encrypting the recording data and a key for decrypting the encrypted data are generated, and they are recorded in different areas on the recording medium. When the data recorded by the recording method is erased, only a key portion in a file including the key for decrypting the encrypted data is physically made a defect, or is registered as the defect by a defect management system. Thereby, since the key portion becomes unreadable, it becomes impossible that the recording data is restored by decrypting the encrypted data. Therefore, the recording data can be substantially completely erased.

In a video disk recording / playback device for converting a digital video signal or the like into high-efficiency coded data and recording the coded data on a video disk, or for restoring high-efficiency coded data recorded on the video disk and reproducing an output image, wherein said digital video signal is composed of a succession of video signals of a plurality of frames and including an I picture encoded within a frame, a P picture interframe coded by forward motion compensation with reference to said I picture and / or another P picture, and a B picture interframe coded by motion compensation in both directions with reference to said I and / or P pictures temporally preceding and succeeding the B picture, there are further provided a means for recording in an image information table set up on said video disk all of the start addresses of coded data representing selected images such as images to be retrieved and the start addresses of data containing information required for reproducing the coded data. With the above configuration, retrieval of all kinds of images of I, P, and B pictures is possible by recording all of the start addresses of coded data representing selected images such as images to be retrieved and the start addresses of data containing information required for reproducing the coded data in the image information table on the video disk.

In a video disk recording / playback device for converting a digital video signal or the like into high-efficiency coded data and recording the coded data on a video disk, or for restoring high-efficiency coded data recorded on the video disk and reproducing an output image, wherein said digital video signal is composed of a succession of video signals of a plurality of frames and including an I picture encoded within a frame, a P picture interframe coded by forward motion compensation with reference to said I picture and / or another P picture, and a B picture interframe coded by motion compensation in both directions with reference to said I and / or P pictures temporally preceding and succeeding the B picture, there are further provided a means for recording in an image information table set up on said video disk all of the start addresses of coded data representing selected images such as images to be retrieved and the start addresses of data containing information required for reproducing the coded data. With the above configuration, retrieval of all kinds of images of I, P, and B pictures is possible by recording all of the start addresses of coded data representing selected images such as images to be retrieved and the start addresses of data containing information required for reproducing the coded data in the image information table on the video disk.

A recording apparatus includes recording heads mounted in a carriage which can move in a direction vertical to a main surface of a recording medium, a guide rail which guides movement of the carriage, and a recovery unit which recovers recording characteristics. The carriage has a regulating section which regulates vertical upward movement of the carriage. A regulating section distance between the guide rail and regulating section is switchable between a first distance and a second distance which is smaller than the first distance. The regulating section distance is set to the second distance when the recovery unit performs a recovery operation.

A hybrid recording and / or reproducing apparatus can deal with a readout failure of all or part of AV information on a hard disk by restoring the record by using a backup record which has been saved on a tape, and also can expand the recording capacity as the whole system based on the combination of the hard disk and tape. The apparatus consists of a server which records and reproduces AV information on the hard disk, a tape unit which records and reproduces AV information on the tape, and a control system which controls to save all or part of the AV information to be recorded on the hard disk onto the tape simultaneously to or on expiration of a certain time after the recording of the AV information on the hard disk.