Abstract:
With two consecutive product-coded ECC blocks, EB1 and EB2, as a set, the rth row of first ECB block EB1 is followed by the rth row of second ECC block EB2 in such a way that the first row of first ECC block EB1 is followed by the first row of second ECB block EB2, which is followed by the second row of first ECC block ECB1, which is followed by the second row of second ECC block EB2, and so on, to interleave data on a row basis. That is, data of two ECC blocks, EB1 and EB2, is allocated alternately on a row basis. This allocation method allows an error to be distributed after reproduction even when a serious burst error extending 18 rows occurs in an ECC block.
Abstract:
A display apparatus has a display unit having a matrix of multiple pixels, a divider to divide a field of a digital input video signal to be supplied to the display unit into a specific number of subfields, a memory storing a look-up table to be used by the divider for dividing the field into the subfields, the look-up table listing data for selectively turn on and off the subfields in accordance with gradation levels of the digital video signal, an image being to be displayed on the display unit when the subfields are selectively turn on, and a driver to drive the pixels of the display unit per specific number of subfields so that an image based on the digital input video signal is displayed on the display unit. The subfields are aligned in the lookup table in order of displaying the image. Display periods of the subfields become longer or shorter in order of displaying the image. The difference in display period between subfields becomes smaller per one subfield or per several number of the subfields as the display periods become longer. The difference in display period between subfields may be constant over the subfields.
Abstract:
A method and apparatus for altering the picture updating frequency within an MPEG compressed video data stream replaces the data of each of successive predictively encoded pictures of that data stream, such as all of the B-picture or all of the B-pictures and all of the P-pictures, with copy data which have been stored beforehand in a memory and which designate all of the macroblocks of each such replaced picture as being skipped macroblocks with respect to a corresponding reference picture, thereby ensuring that each such replaced picture will be decoded as a copy of the corresponding reference picture by a MPEG decoder apparatus. Alteration of the picture updating frequency of the stream of pictures expressed by the MPEG data stream can thereby be achieved very simply, while in addition the overall amount of MPEG data can be substantially reduced.
Abstract:
A recording area of a hard disk is managed nullunitnull by nullunitnull where a nullunitnull is constituted by physically continuous recording regions having predetermined size, and usage status of the unit is stored in an allocation unit (AU) management table. Data requiring a real time processing is stored unit by unit. When the usage status of the unit is changed or modified due to the recording or deletion of data, the AU management table is updated and then information indicative of the fact that the AU management table has been updated is recorded. An apparatus where the final change is made is detected at the time the hard disk is inserted or a file system is initialized. And if the apparatus which last made the change adopts the file system which does not use the AU management table, then the table is reconfigured so as to retain the consistency of the AU management table.
Abstract:
A flat motor is composed of a rotor 1 provided with a driving magnet 3 in a ring shape and a shaft 8, and a stator 5. The stator 1 is composed of a stator yoke 6 provided with a bearing mounting section 12 for mounting a bearing 10 for holding the rotor 1 and a driving coil mounting section 13 for mounting a plurality of driving coils 4 disposed in conjugating with the outer side of the bearing mounting section 12. The plurality of driving coils 4 is disposed in a concentric circle with facing towards the driving magnet 3. The bearing mounting section 12 is formed flat in a circular shape with centering the shaft 8. The driving coil mounting section 13 is a part of surface of approximately a circular cone shape having a vertex on the shaft 8 and is in a shape of inclining towards a direction away from the rotor 1 in accordance with being far away from the shaft 8 and formed with a pleat by bending the stator yoke 6 in a conjugating section 14 between the bearing mounting section 12 and the driving coil mounting section 13.
Abstract:
A recording disc has a lead-in area and a data area. A scrambled version of a SID code word is read out from the lead-in area of the disc. The SID code word represents a producer of the disc. The readout scrambled version is de-scrambled to recover the SID code word. The recovered SID code word is collated with reference SID code words to decide whether or not the disc is legitimate. Main information is read out from the data area of the disc when it is decided that the disc is legitimate. Readout of the main information from the data area of the disc is inhibited when it is decided that the disc is not legitimate.
Abstract:
A digital signal recording disc has a first area and a second area. The second area differs from the first area. The first area stores a first-channel digital audio signal and a second-channel digital audio signal. The first-channel digital audio signal results from quantizing a first-channel analog audio signal with a first quantization bit number. The second-channel digital audio signal results from quantizing a second-channel analog audio signal with a second quantization bit number. The second area stores information of the first and second quantization bit numbers.
Abstract:
A format of data recorded in a DVD-Audio disc is composed of an audio manager (AMG) and a plurality of audio title sets (ATSs) following the AMG. A plurality of audio packs are arranged in each ATS. An audio signal indicating a musical composition is encoded to audio data in a signal processing circuit, and the audio data is arranged in the audio packs. The audio data of the audio packs are formatted in a DVD formatting unit with the AMG to be arranged in the ATSs following the AMG. Also, copyright information is arranged in an area of a control data block placed in a read-in area of the DVD-Audio disc. Table-of-contents (TOC) information indicating a top address of the audio data is automatically produced and is arranged in an empty area of the control data block reserved for the copyright information, in an area of the audio packs, in an area of the AMG or in an area of the ATSs. The AMG, the ATSs including the audio packs and the TOC information arranged at the data format in the DVD formatting unit are transmitted to a human editor through a transmission medium and is recorded in the DVD-Audio disc. Therefore, when the audio data is read out from the DVD-Audio disc, the audio data can be easily played back from the top position of the musical composition according to the TOC information.
Abstract:
A format of data recorded in a DVD-Audio disc is composed of an audio manager (AMG) and a plurality of audio title sets (ATSs) following the AMG. A plurality of audio packs are arranged in each ATS. An audio signal indicating a musical composition is encoded to audio data in a signal processing circuit, and the audio data is arranged in the audio packs. The audio data of the audio packs are formatted in a DVD formatting unit with the AMG to be arranged in the ATSs following the AMG. Also, copyright information is arranged in an area of a control data block placed in a read-in area of the DVD-Audio disc. Table-of-contents (TOC) information indicating a top address of the audio data is automatically produced and is arranged in an empty area of the control data block reserved for the copyright information, in an area of the audio packs, in an area of the. AMG or in an area of the ATSs. The AMG, the ATSs including the audio packs and the TOC information arranged at the data format in the DVD formatting unit are transmitted to a human editor through a transmission medium and is recorded in the DVD-Audio disc. Therefore, when the audio data is read out from the DVD-Audio disc, the audio data can be easily played back from the top position of the musical composition according to the TOC information.
Abstract:
An information recording medium is at least composed of a substrate, a second recording layer, a second light transmitting layer, a first recording layer for recording different information from that to be recorded in the second recording layer, and a first light transmitting layer. The second recording layer is formed with a second microscopic pattern that is composed of continuous substance of grooves. The first recording layer is formed with a first microscopic pattern that is different from the second microscopic pattern, which is composed of continuous substance of grooves. Both sidewalls of raised portions of the first and second microscopic patterns are formed with wobbling so as to be parallel with each other. An auxiliary information and a reference clock is recorded on these sidewalls alternately and continuously.