Abstract: A reproducing apparatus includes a reproducing section picking up any signals compressed in a plurality of different compression methods from a recording medium. The recording medium records the signals compressed in a plurality of different compression methods and record management information denoting association of the signals compressed in a plurality of different compression methods with each other, respectively. A decoding section decodes the signal picked up from said recording medium, and a recording section records reproduction management information including reproduction-interruption information in the reproducing section associated with the record management information onto the recording medium.

Abstract: When displaying an image taken as portrait-oriented image in a landscape-oriented display area, a cutout image including a partial area of the portrait-oriented image to be displayed is displayed. At that time, a whole image of the port-oriented image which is rotated based on rotation information thereof may be displayed along with the cutout image.

Abstract: To allow the user to specify easily a frame when video, of which the frame rate (or vertical scanning frequency) has been converted, is being edited. A data processor includes: a receiving section for receiving a signal representing first video in which a plurality of pictures are presented at a first frequency; an encoder for generating a data stream representing second video, in which the pictures are presented at a second frequency, different from the first frequency, based on the signal; and a writing section for writing the data stream on a storage medium. The encoder generates picture data about the respective pictures, first time information indicating presentation times at the first frequency, and second time information indicating presentation times at the second frequency, and stores the first time information, the second time information and picture data of the respective pictures to be presented based on the first time information in association with each other, thereby generating the data stream.

Abstract: In a printing system, a printing management server is provided to receive a document specific data identifying a print-out document from a mobile station and transmit the document specific data to a print server. The printing management server transmits a reservation identification data identifying a printing reservation of the print-out document to both the mobile station and a printing management terminal. The printing management terminal receives a printable data of the print-out document and causes a printer to perform printing of the print-out document when the reservation identification data is received.

Abstract: An opening for forming a gate electrode is provided by a first photoresist pattern formed on an insulating film. Reactive ion etching by inductively coupled plasma is applied to the insulating film through the first photoresist pattern as a mask to thereby expose the surface of a GaN semiconductor layer, evaporating thereon a gate metal such as NiAu, thereby forming the gate electrode by self-aligned process. This prevents an oxidized film from being formed on the surface of the semiconductor layer. After the gate electrode is formed, a second photoresist pattern is formed to form a field plate on the gate electrode and the insulating film through the second photoresist pattern as a mask. Thereby, Ti having a high adhesiveness with an insulating film made of SiN or the like can be used as a field plate metal.

Abstract: A field effect transistor includes an active layer formed on a semiconductor substrate, source and drain electrodes formed apart from each other on the active layer, a gate electrode formed between the source and drain electrodes, a first interlayer film formed on the active layer, a first field plate (FP) electrode connected to the gate electrode and provided on the first interlayer film between the gate and drain electrodes, a second interlayer film formed on the first interlayer film, and a second FP electrode connected to the source electrode and provided on the second interlayer film between the first FP and drain electrodes. The field effect transistor is provided which exhibits a comparatively high gain factor at high frequencies.

Abstract: To provide a technique of writing data efficiently on a storage medium and thereby play back a content continuously. Specifically, the file allocation table (FAT) of a storage medium is supposed to be read on a partial FAT basis and data is written by a preferred method for that reading method. A data processor writes a content data stream on a storage medium, on which a data storage location is defined based on a file allocation table (FAT).

Abstract: An audio/video information recording/reproducing device capable of easily implementing a post-recording function on an optical disk by using even a low-cost disk drive having a comparatively low-speed seek time. When recording a video file, it is recorded on an optical disk continuously for a duration equivalent to more than three times a seek time. When recording dubbing audio, it is recorded continuously only with constant data size at the same time with the reproducing of the recorded video file, thereby enabling concurrent real-time continuous reproducing and recording. Accordingly, concurrent reproductions of a video file and an audio file are ensured when reproducing dubbing audio.

Abstract: An audio/video information recording/reproducing device capable of easily implementing a post-recording function on an optical disk by using even a low-cost disk drive having a comparatively low-speed seek time. When recording a video file, it is recorded on an optical disk continuously for a duration equivalent to more than three times a seek time. When recording dubbing audio, it is recorded continuously only with constant data size at the same time with the reproducing of the recorded video file, thereby enabling concurrent real-time continuous reproducing and recording. Accordingly, concurrent reproductions of a video file and an audio file are ensured when reproducing dubbing audio.

Abstract: A data processor includes a stream assembling section which divides video and audio data into a plurality of packets, and makes a plurality of data units, in each of which a video packet representing a fraction of the video data and an audio packet representing a fraction of the audio data are multiplexed together to generate a data stream composed of a plurality of data units; and a writing section for writing the data stream on a storage medium. The stream assembling section determines what video packets and audio packets are included in each data unit, and if a portion of audio data, which is associated with the video data stored in a predetermined data unit, is missing from the predetermined data unit, then copied data, obtained by copying partial audio data including at least that missing portion of the audio data, is put into the data stream.

Abstract: To provide means for accessing a content data stream efficiently even when the data stream is stored on multiple files. A data processor according to the present invention can write a content data stream on a medium. The data stream includes a plurality of pictures and a playback unit with one or more decoding units that need to be decoded from a base picture. The data processor includes: at least one of an encoder for generating the data stream and a receiving section for receiving the data stream; and a media control section for writing the data stream on the medium. If the size of a file, on which the data stream is being written, has exceeded a predetermined value, the media control section goes on to write the data stream on another file, generates a piece of information showing that the stored data of the playback unit has been split into these files, and writes the information on the medium.

Abstract: An AV data recording apparatus and an AV data recording method are provided, in which even in the case of using the UDF file system, seeking can be minimized. The AV data recording method has file management information for managing continuous blocks on a disk as an extent, and dividing the extent into groups so as to manage the extent as a file, wherein a new directory is created on a disk, and a not recorded but allocated extent is kept as a reservation region for recording file management information.

Abstract: Deterioration of the high frequency characteristics of a field effect transistor is prevented, and the on- and off-gate leakage currents are reduced. A field effect transistor comprises the fourth electrode 126 between the gate electrode 122 and the drain electrode 118. The fourth electrode is formed to satisfy the relationship of 0.25=(FP2?D)/Lgd=0.5, where Lgd represents a distance between the gate and drain electrodes and FP2?D does the distance between the drain and fourth electrodes.

Abstract: An AV data recording apparatus and an AV data recording method are provided, in which even in the case of using the UDF file system, seeking can be minimized. The AV data recording method has file management information for managing continuous blocks on a disk as an extent, and dividing the extent into groups so as to manage the extent as a file, wherein a new directory is created on a disk, and a not recorded but allocated extent is kept as a reservation region for recording file management information.

Abstract: An AV data recording apparatus and an AV data recording method are provided, in which even in the case of using the UDF file system, seeking can be minimized. The AV data recording method has file management information for managing continuous blocks on a disk as an extent, and dividing the extent into groups so as to manage the extent as a file, wherein a new directory is created on a disk, and a not recorded but allocated extent is kept as a reservation region for recording file management information.

Abstract: To provide means for editing a content data stream quickly. A data processor according to the present invention can edit a content that has been written on a medium. The content is stored in a file as a data stream including multiple packets of the same packet size. And a file system for accessing data on a cluster size basis has been established on the medium. The data processor includes: a receiving section, which receives an instruction on a partial deletion range including the beginning of the file; and a media control section for deleting data, the size of which is an integral number of times as large as the least common multiple of the cluster size and the packet size, from the beginning of the file within the partial deletion range.

Abstract: An information recording or reproduction apparatus and method in which a transport packet for padding is not inserted and a limited recording space is used effectively when performing data editing to delete a mid-stream of the moving picture file consisting of an MPEG transport stream and connect the remaining portions. A data portion preceding the deleted portion, a data portion immediately after the deleted potion, and the remaining data portion are recorded as three independent data files and information on the sequence between these data files is recorded together as a management file.

Abstract: An AV data recording apparatus and an AV data recording method are provided, in which even in the case of using the UDF file system, seeking can be minimized. The AV data recording method has file management information for managing continuous blocks on a disk as an extent, and dividing the extent into groups so as to manage the extent as a file, wherein a new directory is created on a disk, and a not recorded but allocated extent is kept as a reservation region for recording file management information.

Abstract: A data processing apparatus includes a recording unit operable to record content including video stream and/or audio stream to a recording medium, and a menu recording unit operable to generate control information for displaying a first menu (“Treasure Menu”) and a second menu (“Pleasure Menu”). The first menu allows selection of content from contents which are selected by the user out of contents stored in the recording medium. The second menu is selectively displayed between the first and second menus and allows selection of content from contents which are not selected by the user. The recording unit records the control information to the recording medium.

Abstract: The present invention provides a semiconductor device having a recess-structured ohmic electrode, in which the resistance is small and variation in the resistance value caused by manufacturing irregularities is small. In the semiconductor device of the present invention, a two-dimensional electron gas layer is formed on the interface between a channel-forming layer and a Schottky layer by electrons supplied from the Schottky layer. The ohmic electrode comprises a plurality of side faces in ohmic contact with the two-dimensional electron gas layer. At least a part of side faces of the ohmic electrodes are non-parallel to a channel width direction. In a preferred embodiment of the present invention, the side faces have a saw tooth form or a comb tooth form. Since the contact area between the ohmic electrode and the two-dimensional electron gas layer is increased, ohmic resistance is reduced.