Nec Electronics Corporation

Tomoyuki Okuyama

Kenji Tanaka

Akihisa Nomura

An embodiment of the present invention provides a video signal multiplexing apparatus including a separator separating picture information and additional information from a received video signal, a controller adjusting, if the picture information is out of sync with the additional information, a data amount of the additional information based on a data amount of the picture information in such a manner that the picture information is in sync with the additional information, and a multiplexer multiplexing the encoded data and the additional information the data amount of which has been adjusted.

Video signal multiplexer, video signal multiplexing method, and picture reproducer

A data recording/reproducing apparatus according to an embodiment of the present invention includes: a temporary storage unit for storing a data stream including a plurality of data units, which is divided into M (M is a natural number) segments that stores the plurality of data units; a control unit for detecting that K (K is a natural number) data units related to the order of reproducing or recording data of a first data unit, after the first data unit included in the data stream is stored in the temporary storage unit, and setting relational information for the K data units in the first data unit; and a recording/reproducing unit that receives a data stream including the set first data unit from the temporary storage unit on a segment basis, and references the received data stream to generate recording data to record the data on a recording medium, and/or reads the recorded data from the recording medium to reproduce the read data.

Data recording/reproducing apparatus and method

A data stream generating apparatus for a recording/replaying apparatus includes a storage unit and a control module. The control module generates a video elementary stream and an audio elementary stream from inputted video data and audio data to store in the storage unit, and generates and stores a navigation pack in the storage unit. The control module determines an output order of the navigation pack, a plurality of video packs generated from the video elementary stream and a plurality of audio packs generated from the audio elementary stream based on a unit size of an output data stream, a data quantity of the video elementary stream and a data quantity of the audio elementary stream, while updating the navigation pack. Then, the control module outputs the navigation pack, the plurality of video packs, and the plurality of audio packs as an output data stream based on the output order.

Apparatus and method for generating data stream and recording/replaying apparatus using the same

A data recording device for recording video data and/or audio data on a recording medium comprises a compression-encoding unit for compressing and encoding an inputted data stream, hierarchizing a variable data block, and blocking a plurality of generated lower-level data blocks as an upper-level data block, a data block temporary storage unit for temporality storing at least one upper-level data block generated in the compression-encoding unit and including n number (n is a given natural number) of lower-level data blocks; and a control unit for managing a size of the upper-level data block generated in the compression-encoding unit and controlling the compression-encoding unit to perform blocking of data blocks in such a way that the upper-level data block includes a plurality of lower-level data blocks to an extent that a size of the upper-level data block does not exceed a capacity of the data block temporary storage unit.

Data recording device, data recording method, and recording control program

In the starting NV_PCK of a VOBU in a DVD-Video format stream, a flag indicating the M value preceding and succeeding the VOBU is inserted to indicate the picture structure of the VOBUs before and after a cell boundary for use in calculating time information on a DVD-VR format stream from time information on a DVD-Video format stream.

Growing community of inventors

Kanagawa, Japan

Tomoyuki Okuyama