Abstract: The electronic device pertaining to an embodiment comprises a housing that holds an optical disk. The housing comprises a holding space holding an optical disk, a first internal space being apart from the holding space and in which a first electronic component controlling a pickup is disposed, an intake channel leading from the first internal space to the holding space, and an exhaust channel leading from the holding space to a specific space being distinct from the first internal space.

Abstract: The electronic device pertaining to an embodiment comprises a housing that holds an optical disk. The housing comprises a holding space holding an optical disk, a first internal space being apart from the holding space and in which a first electronic component controlling a pickup is disposed, an intake channel leading from the first internal space to the holding space, and an exhaust channel leading from the holding space to a specific space being distinct from the first internal space.

Abstract: A video signal output apparatus is provided. Video format information that can be displayed on a video display apparatus is detected by an I/O unit from an input data. A comparing unit compares the detected video formats with video formats that can be converted by a converting unit, and then common video formats are set as selectable video formats and output as menu video. A user sees the menu video and selects a video format. Simultaneously with the converted digital video data, video format information is also inserted into the output data and then outputted. Accordingly, the video display apparatus switches the video format of the screen. The user can select a most suitable video format from the menu screen by only connecting the apparatuses, and then the video format of the video display image apparatus is also switched automatically.

Abstract: A video signal output apparatus is provided. Video format information that can be displayed on a video display apparatus is detected by an I/O unit from an input data. A comparing unit compares the detected video formats with video formats that can be converted by a converting unit, and then common video formats are set as selectable video formats and output as menu video. A user sees the menu video and selects a video format. Simultaneously with the converted digital video data, video format information is also inserted into the output data and then outputted. Accordingly, the video display apparatus switches the video format of the screen. The user can select a most suitable video format from the menu screen by only connecting the apparatuses, and then the video format of the video display image apparatus is also switched automatically.

Abstract: A device for synchronizing data processing, which receives input data comprising a plurality of data blocks comprising plural data sequences, and data block boundary detecting means; reference time detecting means for detecting reference time information required for updating a reference of synchronization; demultiplexing means for demultiplexing the input data; N pieces of means for detecting data processing/output time from one of the data sequences that shows a time to process and output data; and means for synchronizing data processing/output, according to the data processing/output time information detected by the N pieces of means for detecting data processing/output time, so that the N pieces of data processing/output means are synchronized with each other and process and output the data in the respective data sequences in correct timings along the temporal order.

Abstract: An optical disk apparatus having rewritable optical disk with a spiral groove which is used as an information recording track. The track has two hard address mark areas formed once every rotation of the track around the center of the disk. The hard address mark areas are arranged in a single virtual straight line passing through the center of the disk to avoid crosstalk between recorded data and the hard address mark area. The track also has a periodic radial wobble groove containing frequency information at a specified period. A servo control circuit controls rotation of the disk at a constant linear velocity (CLV) in response to frequency information from the wobble groove. The hard address mark area and the wobble groove are pre-formed when pressing the disk. Sectors of equal length, where picture and sound information is recorded, are formed by recording a soft address mark signal produced in response to the hard address mark.