摘要:
A method is proposed introducing a temporarily erased flag in order to indicate a cell to be temporarily erased. In addition, necessary time stamps are set for complete Stream Object Units to be erasable to enable on the fly permanent erasure without any additional view into the streams or quick permanent erasure. Advantageously the temporarily erasure can also be completely withdrawn.
摘要:
Subtitling can be based on either pixel data or on character data. Character data allow very efficient encoding, but from character strings alone, subtitling can not be converted into a graphical representation to be overlaid over video. The intended character set, font and e.g. font size, must either be coded explicitly within the subtitling bitstream or an implicit assumption must be made about them. In pixel-based subtitling, subtitling frames are conveyed directly in the form of graphical representations by describing them as (typically rectangular) regions of pixel values on the AV screen, at the cost of considerably increased bandwidth for the subtitling data. According to the invention, a font memory is used that allows an efficient realization of pixel-based subtitle lettering, because the glyphs need only be transmitted once and thereafter are referenced by relatively compact character references during the AV event. Thereby the invention combines the advantages of pure pixel-based and pure-character-based subtitling schemes, while mostly avoiding their respective shortcomings.
摘要:
The present invention provides a picture sequence coded for horizontally moving objects such as running scripts, while complying with the rules and instructions specified in the DVD Standard, and optimizing the memory requirement. In one embodiment of the present invention, the horizontal motion is achieved by implementing a specific type of run-length coding in conjunction with a special way of combining object picture segments. The invention further provides a storage medium for storing such picture sequence coded for horizontally moving objects.
摘要:
The invention relates to the updating of a local copy of metadata. First change history data of metadata are read from an optical storage medium. Second change history data of the metadata are read from a local storage of an optical storage medium playback and/or recording device. If the first and second change history data are different a change attribute is read a from the optical storage medium and an update operation of the metadata stored in the local storage or an update operation in the optical storage medium is determined depending on the change attribute.
摘要:
The invention relates to a method of editing a data stream, the data stream having a first unique identifier of an identifier space and having assigned metadata, the metadata comprising meta information and a metadata link, the metadata link comprising the first unique identifier and at least one data packet identifier. When performing an editing operation on the data stream, a second unique identifier of the identifier space is assigned to the data stream and the first unique identifier for a resolver task is stored, using a decision metric for updating the meta link.
摘要:
The invention relates to a method of linking metadata to a data stream, the data stream having time-based navigation data and play list data, the play list data being indicative of play items of one or more play lists, the time-based navigation data mapping play items to the data stream, the method including the steps of: using the time-based navigation data for mapping of metadata to the play items, storing a metadata link being descriptive of the mapping of the metadata to the play items.
摘要:
A method for recording and reproducing video and/or audio signals having an additional information item, e.g. a title information item, recorded therein, which additional information item may be subsequently inserted into a video picture during reproduction. The additional information data are converted, thereby producing an executable sub-picture unit, and is recorded in a corresponding sub-picture data pack in addition to the data packs for the video/audio signal. Thus, it is possible to record the additional information data separately without difficulty without necessitating a change to the recording format to the effect that special data packs for the additional information items are included in the planning. The invention also relates to a corresponding recording and reproduction apparatus.
摘要:
The invention relates to the updating of a local copy of metadata. First change history data of metadata are read from an optical storage medium. Second change history data of the metadata are read from a local storage of an optical storage medium playback and/or recording device. If the first and second change history data are different a change attribute is read a from the optical storage medium and an update operation of the metadata stored in the local storage or an update operation in the optical storage medium is determined depending on the change attribute.
摘要:
Stream recording assumes e.g. a settop box to be connected to a DVD Streamer. The connection is e.g. of IEEE 1394 type using interfaces including transmitting and receiving firmware. Stream Data include one or more Stream Objects which each can be stored as a Program Stream as described in ISO/IEC 13818-1, Systems. The invention allows to realise Access Units in such DVD Streamer. Each Stream Object contains its own Access Unit data. A trickplay mode, e.g. fast forward, is performed by selecting the desired Access Units which are derived from a mapping list with incremental application packet arrival times.
摘要:
DVD Stream Recording allows to recover or permanently erase on-the-fly preliminarily erased cells on the disc. In case of very low-bitrate stream recording there could be less than one application packet and therefore timestamp per Stream Object Unit. In such situation, stuffing is necessary in order to guarantee the proper functioning of the Mapping List data retrieval. To make on-the-fly preliminarily erasure, complete recovery or permanent erase possible even for stuffing data packets located at cell boundaries, to two special timestamps defining a preliminarily erased cell and two other timestamps defining the location of a normal cell a different meaning is assigned under specific circumstances.