Victor Company of Japan, Limited

Jvc Kenwood Corporation

Toshio Kuroiwa

Takayuki Sugahara

Seiji Higurashi

Wataru Inoha

Kenjiro Ueda

Norihiko Fuchigami

Harukuni Kobari

Atsushi Hayami

Junzo Suzuki

Masayoshi Nishitani

Hirotoshi Ohno

Tsuyoshi Oki

Yoshiaki Tanaka

Ichiro Shishido

Hiroyoshi Yoshikawa

Nobuchika Ochi

Executes a re-encoding after decoding data of a connection section A of a first MPEG picture data. This re-encoding is executed based on a control such that a transition of a VBV buffer occupation value starts from a VBV buffer occupation value at a position a and ends with a VBV buffer occupation value at a position d. Up to the position a of the first MPEG picture data, the first MPEG picture data is reproduced. Next, re-encoded MPEG picture data of the connection section A is reproduced. Thereafter, the data is connected to the position d of a second MPEG picture data, and the second MPEG picture data of the position d and after is reproduced.

MPEG picture data recording apparatus, MPEG picture data recording method, MPEG picture data recording medium, MPEG picture data generating apparatus, MPEG picture data reproducing apparatus, and MPEG picture data reproducing method

An audio signal is compressively encoded into encoding-resultant audio data. A video signal is compressively encoded into encoding-resultant video data. An audio time stamp for audio-vide synchronous reproduction is added to every unit of the encoding-resultant audio data. A video time stamp for audio-video synchronous reproduction is added to every unit of the encoding-resultant video data. The time-stamp-added audio data and the time-stamp-added video data are multiplexed into main data. To a plurality of first after-recording-purpose data for at least one of (1) the encoding-resultant audio data and (2) the encoding-resultant video data which form the main data, time stamps for reproduction synchronous with a portion of the main data and identification information for identifying the plurality of first after-recording-purpose data are added to convert the first after-recording-purpose data into second after-recording-purpose data. The second after-recording-purpose data are made into bit streams without being multiplexed with the main data.

After-recording apparatus

Video data is divided into portions which are sequentially recorded on recording mediums respectively. IDs of the respective recording mediums are set. IDs of the respective video data portions are set. Items are recoded on first one among the recording mediums. These items are the ID of the first recording medium, the ID of first one among the video data portions, the ID of second one among the recording mediums which follows the first recording medium, and the ID of second one among the video data portions. Items are recorded on last one among the recording mediums. These items are the ID of the last recording medium, the ID of last one among the video data portions, the ID of second last one among the recording mediums which precedes the last recording medium, and the ID of second last one among the video data portions.

Video data recording apparatus and method, and video data reproducing apparatus and method

Playlists are generated. Each of the generated playlists instructs playback of at least a portion or portions of one or ones selected from contents-data pieces recorded on a recording medium. Playlist management tables are generated. The generated playlist management tables correspond to the contents-data pieces, respectively. Each of the playlist management tables represents a correspondence between related one of the contents-data pieces and a playlist or playlists each instructing playback of at least a portion of the related one of the contents-data pieces. The playlists and the playlist management tables are recorded on the recording medium.

Contents-data editing apparatus, method of updating playlist of contents data, and recording medium

A once-recordable optical disk has a data recorded area in which application software for creating an information group and a first file system are prerecorded. The application software is readable with the first file system and is used to select desired ones from among information pieces stored in a personal computer and form the information group. According to instructions from the application software, a second file system and the information group readable with the second file system are written in a blank area of the optical disk. After the creation of the information group, the application software and first file system in the optical disk are disabled so that they are unreadable with the second file system.

Information recording method and optical disk

An audio disk has a first audio zone and a second audio zone. In the first audio zone, both of a plurality of tracks each including a single piece of music and a first management information including first control information for allowing each track to be reproduced are recorded. The music is composed of audio data produced from either a linear PCM signal or a signal produced by applying lossless compression to the linear PCM signal. In the second audio zone, music composed of audio signal produced under lossy compression, a plurality of files each storing a signal of a single piece of music subjected to the lossy compression, and second management information including second control information for allowing each file to be reproduced are recorded. Each piece of music stored in each file corresponds to the music included in any one of the tracks in the first audio zone.

Disk for audio data, reproduction apparatus, and method of recording/reproducing audio data

Each record of a file recording management table has three fields: Type, Contents, and Next Record Number. The Type field indicates whether the record is a 'file name record' that has file name information in the Contents field or a 'consecutive recording area record' that has position information on a consecutive recording area (position information on a positionally consecutive recording area) of file data in the Contents field. The records are linked and are recorded in one physical recording area as one file recording management table.

Recorder and recording medium

A writable storage medium has a first storage area divided into a plurality of sectors having the same data capacity and a second storage area. The first storage area stores at least encoded moving picture data and encoded audio data. The second storage area stores at least first information indicating whether the audio data is silence data, second information indicating an encoding method by which the audio data has been encoded at a constant bit rate and third information indicating the number of audio channels related to the audio data. The first and second storage areas may further store encoded bitmap video data and data identification information indicating whether the bitmap video data is invisible data, respectively. The first information is detected to determine whether the first audio data is silence data. If the first audio data is judged as the silence data, second audio data to be after-recorded is encoded by the encoding method the same as the method for the first audio data at the bit rate the same as that for the first audio data in response to the second and third information. The encoded second audio data is written over the first audio data. The data identification information is detected to determine whether the first bitmap video data is invisible data. Second bitmap video data to be after-recorded is encoded if the first bitmap video data is judged as the invisible data. The encoded second bitmap video data is written over the first bitmap video data.

Writable storage medium, apparatus and method of recording to a storage medium

An encryption key is generated in response to a plurality of information pieces being bases for the encryption key. Original information is encrypted into encryption-resultant information in response to the generated encryption key. The encryption-resultant information is divided into units. Each of the units is loaded with encryption control information for identifying the plurality of information pieces being the bases for the encryption key.

Method and apparatus for encrypting and decrypting information

A unidirectional function circuit generates a first encryption key according to the device identification information stored in a device identification information holding unit. Another unidirectional function circuit generates a second encryption key that depends on a write block address. A contents key generator generates a contents key using the first encryption key, second encryption key, and relation information. An encryptor records contents, which are encrypted using the contents key, onto a HDD.

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Yokohama, Japan

Toshio Kuroiwa