Panasonic Corporation

Matsushita Electric Industrial Co., Ltd.

Panasonic Intellectual Property Management Co., Ltd.

Masahiro Oashi

Tatsuya Shimoji

Keiichi Tanaka

Yuki Kusumi

Junichi Hirai

Naoya Takao

Takashi Kakiuchi

Kazuo Okamura

Yoshihiro Mimura

Masayuki Kozuka

Yoshiyuki Miyabe

Ikuo Minakata

Tomoyuki Okada

Shinji Inoue

Toshiya Mori

Satoshi Hashimoto

Hidetaka Ohto

Wataru Ikeda

Hiroyuki Waki

Hiroshi Yahata

Tomokazu Kanamaru

Hiroki Nakamura

Hiroaki Iwamoto

Yasuyuki Sonoda

Yoshinori Matsui

Keisei Yamamuro

Germano Leichsenring

Kiyokazu Yamanaka

Shigeaki Watanabe

Chihiro Kawahara

Masahiro Kawai

Kazutoshi Sumiya

Ryoichi Sasaki

Akira Ishikawa

Masafumi Okubo

Mitsuko Fujita

Satoru Hayama

Hidetaka Oto

Hidekazu Shimizu

Hisayuki Kino

A playback apparatus and method that executes an application while playing back a digital stream. A mixer is configured to, when a flag included in a playlist is set to ON, mix an output of a click sound using sound data with an audio output of the digital stream when a user performs an operation on an application while the application is executed. When the flag is set to OFF, the mixer refrains from mixing the output of the click sound with the audio output.

Recording medium, reproduction device, program, reproduction method, and integrated circuit

A playback apparatus has a platformthat is a program execution environment of an application. When the platforminitiates the application, a graphics information transmission unit, which corresponds to an API function, obtains graphics information and stores the graphics information in a graphics information storage unit. A graphics information control unitselects graphics information to be rendered, based on a stream event obtained by a stream event reception unitand the graphics information stored in the graphics information storage unit. The graphics information control unithas a graphics rendition unitrender the selected graphics with a video playback timing relating to the stream event.

Reproduction device

A playback apparatus includes a package management unit operable to generate package information by merging files recorded on a first recording medium and a second recording medium, in accordance with merge management information. A selection unit is operable to detect a plurality of playable titles from the package information and select one of the detected titles as a current title. A processing unit is operable to execute an application specified in the current title and that is included in the package information. A playback control engine is operable to control playback of a digital stream in the current title and that is included in the package information. Status registers each store a parameter relating to a playback status of the digital stream, and backup registers each save one of the status registers.

Playback apparatus for performing application-synchronized playback

A playback device executes playback of video data in sync with an application program associated with the video data. The playback device includes an activating unit for activating the application program, a receiving unit for receiving from a user an input specifying a playback section associated with a piece of video data and an application program, and an activation control unit. If a first input is received from the user by the receiving unit and a second input is received within the predetermined time period from reception of the first input, the activation control unit discards the first input. If a third input is not received within the predetermined time period from reception of the second input, the activation control unit activates an application program according to the second input.

Playback device, playback method, and computer-readable recording medium for ensuring stable application execution in synchronism with video data playback

A playback device that creates a virtual package by combining a structural element recorded on a BD-ROM with an additional content recorded on a removable medium. The middleware in the playback device is provided with a file I/O modulethat controls data input/output of the removable medium, in accordance with a request from an application program. When a BD-J application requests writing the structural element of the virtual package and the additional content to be written is an AV stream, the file I/O modulewrites the structural element into one or more allocation units composed of a plurality of continuous empty logical blocks in the removable medium. When the additional content to be written is not an AV stream, it writes the additional content into a normal data area that is composed of a plurality of separately scattered empty blocks in the removable medium.

Reproducing apparatus that uses continuous memory area

A BD-ROM stores PlayList information. The PlayList information defines a playback section of each of a plurality of AV clips and includes MainPath information and SubPath information. The MainPath information designates one of the AV clips as a Main Clip and defines a portion of the Main Clip as a primary playback section. The SubPath information designates another one of the AV clips as a SubClip and defines a portion of the SubClip as a secondary playback section that is to be played back in synchronism with the primary playback section. The BD-ROM stores, the one of the AV clips designated as the SubClip along with an EP_map. The EP_map shows a plurality of entry points on the SubClip in a one-to-one correspondence with entry times on the SubClip timeline.

Recording medium, reproduction device, program, reproduction method

When a plurality of AVClips recorded on a BD-ROM and Local Storageconstitute one stream sequence, a Playback Control Enginestarts playback if at least one AVClip of the stream sequence is in an enable status, even when the stream sequence also includes an AVClip which is in a disable status. While one AVClip is being played back, a Virtual FileSystem unitchanges a remaining AVClip to the enable status of being recognizable by the Playback Control Engineor the disable status of being unrecognizable by the Playback Control Engine, according to a method call by an application.

Reproducer, program, and reproducing method

A playback apparatus for playing a digital stream in conjunction with an application includes a package management unit operable to generate package information by merging files recorded on a first recording medium and a second recording medium, in accordance with merge management information, and a selection unit operable to detect a plurality of playable titles from the package information, and select one of the detected titles as a current title. After the application requests the package management unit to update the merge management information, by specifying new merge management information, the package management unit changes a file referenced from the newly specified merge management information to read-only before updating the package information, and at a point at which digital stream playback stops due to a current title change by the selection unit, the package management unit generates new package information by combining files recorded on the first and second recording media, in accordance with the newly specified merge management information.

In the Local Storage (), a plurality of files, merge management information which specifies a file out of the plurality of files to be used in combination with what is recorded on a Read-Only recording medium, and signature information used for judging the authenticity of the merge management information. The Virtual File System unit () judges the authenticity of the merge management information based on the signature information. In the case where the merge management information is judged to be authentic, the Virtual File System unit () generates package information which indicates a new file structure obtained by adding the file specified by the merge management information to the file structure of the Read-Only recording medium.

Playback apparatus and playback method

An integrated circuit stores a module that executes applications that play digital streams. When the module is executed, the integrated circuit generates package information by merging files recorded on a first recording medium and a second recording medium, in accordance with merge management information, detects a plurality of playable titles from the package information, and selects one of the detected titles as a current title. The integrated circuit executes the application associated with the current title, and the executed application makes a request to update the generated package information by specifying new merge management information. The integrated circuit changes a file referenced from the newly specified merge management information to read-only before updating the package information, and at a point at which digital stream playback stops due to a current title change, the integrated circuit generates new package information by combining files recorded on the first and second recording media, in accordance with the newly specified merge management information.

In a playback device for playing back a moving image recorded on a recording medium while executing an application recorded on the recording medium, to improve the use efficiency of a memory bus when combining the moving image with an image relating to the application. Whether or not to combine a background image, which is used as a background of GUI graphics such as a menu or a moving picture used by the application, is determined depending on whether the moving image covers the entire background image. If the moving image covers the background image, there is no need to combine the background image with the moving image. In this case, a memory bus allocated to the reading of the background image can be used for, for example, writing the moving image read from the recording medium onto a memory. Hence the memory bus bandwidth can be effectively used.

Reproduction device, image synthesis method, image synthesis program, and integrated circuit

An integrated circuit includes a storage that stores a module that has a function of a virtual machine for executing an application recorded on a recording medium. The integrated circuit also includes a central processing unit that executes the module to cause the virtual machine to function and a decoder, that is distinct from the central processing unit, that decodes a video stream and an audio stream that are included in digital streams stored on a recording media. When the central processing unit executes the module, a package manager manages status information of the digital streams. If at least one of the digital streams is in an enable status, the decoder decodes the digital stream. When the decoder decodes the digital stream, the package manager changes the status information of another digital stream to an enable status or a disable status according to a request from the application.

Integrated circuit or use in playback apparatus

A BD-ROM on which an AVClip and a Java&#x2122; application are recorded. The AVClip includes a video stream and an audio stream multiplexed therein. On the BD-ROM recorded further are management information and the Mixing_On flag corresponding to the management information. The management information indicates a playback control of the AVClip that is to be played back when the Java&#x2122; application is executed. The Mixing_On flag indicates whether or not when a user performs an operation on the Java&#x2122; application being executed while the AVClip is under the playback control, mixing of the click sound with an audio output of the AVClip is available.

Growing community of inventors

Kyoto, Japan

Masahiro Oashi