摘要:
A D/A converter divides an input digital data into at least two overlapping digital ranges. The data in the two ranges are converted separately from digital to analog by a low-range and a high-range DAC. The resulting analog signals are then added with a weighting that maintains the proper loudness relationships in the final combined analog output. In a low range of amplitudes, only the low-range DAC performs D/A conversion. Above a predetermined amplitude threshold, some of the high significant bits to the low-range DAC are frozen, while a remaining low significant bits of the low-range DAC are permitted to vary with the input digital data. Above the predetermined amplitude threshold, a digital value is subtracted from the data fed to the high-range DAC. The subtracted value is equal to the frozen value in the low-range DAC. In some embodiments, one or more supplementary bits are developed to smooth the transition between ranges. In other embodiments, more than two DACs receive overlapping ranges of the input digital data. In some of the embodiments, positive and corresponding negative analog representations of the ranges are connected in push-pull.
摘要:
According to one embodiment, an electronic apparatus includes a speaker, a terminal, an amplifier, a power supply circuit, a setting module, a detection module, and a controller. The terminal is configured to input an audio signal from an external device. The amplifier is configured to amplify the audio signal, and to output audio from the speaker. The power supply circuit is configured to supply power to the amplifier. The setting module is configured to set data which indicates whether audio output from the speaker is to be enabled or disabled when the apparatus is in a non-operative state. The detection module is configured to detect a predetermined state of the apparatus. The controller is configured to control the power supply circuit, based on the data and the predetermined state, in order to supply the power to the amplifier when the apparatus is in the non-operative state.
摘要:
According to one embodiment, an information processing apparatus includes a first touch screen, a second touch screen display, and a display module. The display module is configured to display a first virtual keyboard includes first virtual keys in order to input key codes on the first touch screen display, and to display a second virtual keyboard includes second virtual keys in order to input key codes on the second touch screen display.
摘要:
According to one embodiment, an electronic apparatus includes a speaker, a terminal, an amplifier, a power supply circuit, a setting module, a detection module, and a controller. The terminal is configured to input an audio signal from an external device. The amplifier is configured to amplify the audio signal, and to output audio from the speaker. The power supply circuit is configured to supply power to the amplifier. The setting module is configured to set data which indicates whether audio output from the speaker is to be enabled or disabled when the apparatus is in a non-operative state. The detection module is configured to detect a predetermined state of the apparatus. The controller is configured to control the power supply circuit, based on the data and the predetermined state, in order to supply the power to the amplifier when the apparatus is in the non-operative state.
摘要:
According to one embodiment, an information processing apparatus includes a housing, a communication module in the housing and configured to execute close-proximity wireless transfer with an external device, and an antenna in the communication module and having directivity in a direction the antenna faces, the communication module being in the housing to freely pivot, and is configured to change the directivity of the antenna in the communication module by pivoting.
摘要:
On a write-once-type recording medium 10, there are provided: a definite defect management area 13 to definitely record therein defect management information; and a plurality of temporary defect management areas 14A, 14B, and 14C to temporarily record therein the defect management information. If the recording medium 10 is not yet finalized, every time the defect management information is updated, the updated defect management information is recorded into any one of the plurality of temporary defect management areas. Moreover, a status information recording area 15 is provided on the recording medium 10, and status information for indicating the temporary defect management area in which there is the defect management information recorded at last is recorded into the status information recording area 15. By referring to the status information, it is possible to quickly specify the defect management information recorded at last.
摘要:
On a write-once-type recording medium 10, there are provided: a definite defect management area 13 to definitely record therein defect management information; and a plurality of temporary defect management areas 14A, 14B, and 14C to temporarily record therein the defect management information. If the recording medium 10 is not yet finalized, every time the defect management information is updated, the updated defect management information is recorded into any one of the plurality of temporary defect management areas. Moreover, a status information recording area 15 is provided on the recording medium 10, and status information for indicating the temporary defect management area in which there is the defect management information recorded at last is recorded into the status information recording area 15. By referring to the status information, it is possible to quickly specify the defect management information recorded at last.
摘要:
According to one embodiment, an information processing apparatus includes a main body, a touch pad which is provided on the main body, a determination unit which determines whether an external pointing device is connected to the main body, and a control unit which controls the touch pad in one of a first mode for making the touch pad function as a pointing device and a second mode in which in response to tapping of one of a plurality of virtual buttons disposed on a surface of the touch pad, a function which is assigned to the tapped virtual button is activated, the control unit controlling the touch pad in the second mode if the external pointing device is connected to the main body.
摘要:
A removable component is inserted into the receptacle provided in a housing, through an inlet port provided in the outer surface of the housing. A first lock member is provided in the housing and can move between a first lock position and a first release position. At the first lock position, the first lock member holds the removable component. At the first release position, the first lock member releases the movable component. A second lock member is provided in the housing and can move, by its weight, between the second lock position and the second release position. At the second lock position, the second lock member holds the first lock member at the first lock position. At the second release position, the second lock member is released from the second lock position.
摘要:
An information record medium is provided with: a content space in which a plurality of content domains are recorded, each content domain being constructed from a series of content information; and a system space in which a plurality of menu domains corresponding to the plurality of content domains are recorded, each menu domain being constructed from menu information as for the content information. Another menu domain is recorded in the system space, in addition to the plurality of menu domains, the another menu domain being constructed from menu information as for whole of the plurality of content domains or as for whole of the information record medium.