Sony Corporation

U.S. Philips Corporation

Koninklijke Philips Corporation N.V.

Muneyasu Maeda

Tadao Suzuki

Johannes Jan Mons

Yoshizumi Inazawa

Johannes M M Verbakel

Nobuhiro Kihara

Kunihiko Hayashi

Audio-centered information is stored on a unitary medium by using a Table-of-Contents (TOC) mechanism that specifies an actual configuration of various audio items on the medium. In particular, each one of a set of one or more Track Areas gets at least two mutually logically conforming Sub-TOCs assigned. This allows to retrieve any constituent Sub-TOC part from at least any correct copy of the Sub-TOCs. Furthermore, one or more Master-TOCs are provided for specifically pointing to each of the Sub-TOCs.

Storing audio-centered information with a multi-level table-of-contents (TOC) mechanism having redundant sub-TOCs

A hologram device records information of an interference fringe of signal light and reference light onto a hologram recording medium and reproduces the recorded information by emitting the reference light onto a recording area of the hologram recording medium. The hologram device includes a recording/reproducing controller performing a recording operation of the information concurrently with a reproducing operation of previously-recorded information, and an error detector detecting an error in the previously-recorded information reproduced concurrently with the recording operation.

Hologram device and hologram recording/reproducing method

Storing audio-centered information with a multi-level table-of contents (TOC) mechanism having redundant sub-TOCs

A recording medium including a program region for recording a plurality of files, a first management region for management of a file-related information for the plurality of files, and a second management region for management of a medium-related information for a plurality of recording media used for recording a recording content. A reproduction method and apparatus for reproducing the aforementioned recording medium is also provided.

Recording medium, reproduction method/ apparatus with multiple table of contents

METHOD, DEVICE, AND INFORMATION STRUCTURE FOR STORING AUDIO-CENTERED INFORMATION WITH A MULTI-LEVEL TABLE-OF-CONTENTS (TOC) MECHANISM AND DOUBLING OF AREA-TOCS, A DEVICE FOR USE WITH SUCH MECHANISM AND A UNITARY STORAGE MEDIUM HAVING SUCH MECHANISM

A recording medium includes a program area in which digital data made up of a header, main data and sub-data is blocked and recorded with a variable number of sectors, with a unit sector being of a pre-set data length, and a management area in which there is recorded an identifier for discriminating the variable number of sectors in order to render the data volume of the sub-data variable with the volume of main data in the packet remaining fixed.

Recording medium and reproducing apparatus

A recording medium conforming with a specific physical format of Digital Video Disc/Digital Versatile Disc (DVD) or the like is contrived to achieve superior sound quality in audio data recording and reproduction, common usability of data, and enhanced interchangeability of an apparatus. In this recording medium, identification data signifying the existence of recorded data of a second data format such as Direct Stream Digital Disc (DSD) different from a first data format such as DVD is included in physical format management information recorded in a lead-in area. The data of such second data format is recorded in a data area in conformity with the physical format management information. And second data management information of a Table of Contents (TOC) is recorded at a predetermined position to manage an operation of reproducing the data of the second data format.

Growing community of inventors

Tokyo, Japan

Muneyasu Maeda