摘要:
Die Codierung oder Decodierung von Videodaten mit den zugehörigen Audio- und/oder sonstigen Daten kann beispielsweise nach den Normen ISO/IEC 11172 (MPEG1) oder ISO/IEC 13818 (MPEG2) erfolgen. In manchen Fällen möchte man einen nach derartigen Normen codierten Bitstrom umsetzen in einen Bitstrom mit einer anderen Datenrate. Die beste Bildqualität wird dabei durch eine Decodierung des Primär-Bitstroms und anschließende Encodierung in einen Sekundär-Bitstrom erzielt. Hierzu wird jedoch eine umfangreiche Hardware benötigt. Die Erfindung basiert auf der Wiederverwendung von bewegungskompensierenden Prädiktionsvektoren des Primär-Bitstroms im Sekundär-Bitstrom. Da der Informationsgehalt der Bewegungsvektoren aus dem Primär-Bitstrom auch im Sekundär-Bitstrom seine Gültigkeit behält, ist es nicht nötig, Bewegungsvektoren zur Transcodierung neu zu errechnen. Stattdessen erfolgt eine Encodierung des Sekundär-Bitstroms mit Hilfe der Bewegungsvektoren aus dem Primär-Bitstrom. Dabei wird die Encodierung des Sekundär-Bitstroms in einem eingeschränkten Prädiktions-Mode durchgeführt, d.h. es sind im Sekundär-Bitstrom nur solche Prädiktionsmodi zugelassen, die durch den jeweiligen Block-Typ bzw. die Bewegungsinformation des Primär-Bitstroms beschrieben sind.
摘要:
Die Codierung oder Decodierung von Videodaten mit den zugehörigen Audio- und/oder sonstigen Daten kann beispielsweise nach den Normen ISO/IEC 11172 (MPEG1) oder ISO/IEC 13818 (MPEG2) erfolgen. In manchen Fällen möchte man einen nach derartigen Normen codierten Bitstrom umsetzen in einen Bitstrom mit einer anderen Datenrate. Die beste Bildqualität wird dabei durch eine Decodierung des Primär-Bitstroms und anschließende Encodierung in einen Sekundär-Bitstrom erzielt. Hierzu wird jedoch eine umfangreiche Hardware benötigt. Die Erfindung basiert auf der Wiederverwendung von bewegungskompensierenden Prädiktionsvektoren des Primär-Bitstroms im Sekundär-Bitstrom. Da der Informationsgehalt der Bewegungsvektoren aus dem Primär-Bitstrom auch im Sekundär-Bitstrom seine Gültigkeit behält, ist es nicht nötig, Bewegungsvektoren zur Transcodierung neu zu errechnen. Stattdessen erfolgt eine Encodierung des Sekundär-Bitstroms mit Hilfe der Bewegungsvektoren aus dem Primär-Bitstrom. Dabei wird die Encodierung des Sekundär-Bitstroms in einem eingeschränkten Prädiktions-Mode durchgeführt, d.h. es sind im Sekundär-Bitstrom nur solche Prädiktionsmodi zugelassen, die durch den jeweiligen Block-Typ bzw. die Bewegungsinformation des Primär-Bitstroms beschrieben sind.
摘要:
Movies are produced in 24Hz frame frequency and progressive scanning format (denoted 24p) for projection in film theatres, adhering to a worldwide standard for 35mm film. However, the major TV systems in the world use interlaced scanning and either 50Hz field frequency (denoted 50i) or 60Hz field frequency (denoted 60i). Content providers would prefer providing single-picture-frequency single-audio-speed AV discs that can be replayed in most parts of the world. A 24p audio/video data stream is supplemented with additional 50i format data items, thereby allowing 24p and 50i format replay of that data stream.
摘要:
Consumer electronic devices, such as e.g. high-definition movie players for removable storage media such as optical discs, may provide possibilities for advanced interactivity for the user, implemented as software applications. A question arising generally with such software applications is what the life cycle of such an application is, and who may control it. The invention provides a method for executing software applications within a playback device for audio-video data, wherein data from a first removable storage medium are read for a software application to be executed within said playback device, and the data comprise an indication defining a termination condition for the application. Based on said termination code and depending on how the medium holding the application is ejected, the application is terminated or may survive.
摘要:
Consumers of content protected multimedia data, such as e.g. commercially available video DVDs, want to take backup copies of these data, and want to be free to play the data on any suitable playback device, while content providers want to protect these data against pirate copying. The disclosed method for accessing application data from a first storage medium (MC), e.g. CD, uses an electronic key for decoding or converting the application data. One or more content identifiers are attached to the application data or the first storage medium (MC). The key is stored on a copy-protected separate second storage medium, e.g. RFID tag, and compared with the content identifier. Playback or format conversion of the application data is only possible when the second storage medium (MID) is available. This allows the application data to be copied, distributed or format converted, while simultaneously preserving the content rights of the data because only one copy can be used at a time.
摘要:
The typical operation of AV processing ICs includes an initialisation mode wherein registers are set up according to the desired functionality using dedicated set up software, and a normal decoding mode in which the content of the registers will not be changed any more. Often the initialisation mode software leads to un-initialised pointers and addresses for the registers. The writing of data in case of invalid pointers or address values can be avoided by additional small hardware for the register write access logic which enables or disables a write enable signal for distinct periods of time.
摘要:
Optical disc players are today connectable to the Internet, and may contain local storage capability, e.g. HDD. Additional post-production content can be downloaded and locally stored. It is difficult to include downloaded additional post-production material in menus for keeping a menu always consistent with the actually available data. Ideally, the menu should reflect the available data even if certain content is deleted or replaced with e.g. another version. A 'linked-list' approach for menu pages generates a dynamic menu structure. The menu consists of basic menu pages (11), which are retrieved from the disc, and additional pages that are downloaded together with the additional content. Page ranges may be reserved for e.g. audio, video or subtitles. The linked-list is implemented by an implicit link (22,23) from each page to the next higher or lower page number.
摘要:
A method for generating an interactive electronic menu on a display, the menu comprising menu items, wherein a menu item may be in a deselected, selected or activated state, and the menu being coded into a menu data segment, comprises that at least a first and a second menu item are connected by a parent-child relationship, wherein the second menu item being a child of the first menu item can only be selected when the first menu item is selected, and further comprises that the first and the second menu item are coded into the same data segment. The method is preferably usable for menus relating to content of digital storage media, such as optical discs, in particular read-only Blu-ray discs.
摘要:
Disclosed is a method of editing a data stream (104), the data stream having a first unique identifier of an identifier space and having assigned metadata (106), the metadata comprising meta information and a metadata link, the metadata link comprising the first unique identifier and at least one data packet identifier, the method comprising the steps of:
performing an editing operation (100) on the data stream, assigning a second unique identifier of the identifier space to the data stream, storing of the first unique identifier for a resolver (124) task, using a decision matrix (122) for updating of the meta-data link.
摘要:
Optical discs may support "Out Of Multiplex" formats, meaning that different presentation components, like video, audio and subtitles, are stored on different files on the disc, e.g. Blu-ray discs. The different data streams are read by a single pick-up, requiring frequent pick-up jumps and extensive data buffering. The method for operating a scheduler for an optical pick-up reduces the number of pick-up jumps while optimizing the required buffer space. The scheduler is based on a static schema, meaning that the buffer (B video ) for the data stream with the highest data rate is of minimal size, and therefore refilled in short periods (T), while the buffers for the lower rated streams (B audio ,B sub ) are dimensioned such that they can be refilled in multiples (n·T, n·k·T) of the short period (T). Deviations from the static schema may be allowed, e.g. due to multi-angle video technique. Afterwards the scheduler returns to the original schedule.