Abstract: A computer-implemented method, according to one embodiment, includes: estimating, by the computer system, a waiting time for copy target data to be transferred from the source medium. The waiting time includes an estimated time for locating and reading the copy target data from the source medium. The method also includes selecting, by the computer system, migration target data on the source medium based on whether migration of data to the target medium is expected to be finished within the waiting time. The selecting is based at least in part on comparing a size of the data and an allowable size calculated based on the waiting time and an estimated write transfer rate to the target medium. The method further includes migrating, by the computer system, the migration target data from the source medium to the target medium.

Abstract: A computer system, operated on a system platform, includes memories and a controller circuit. The memories include a first memory and a second memory, in which the first memory include s a first storage space and a second storage space, and a size of a total storage space of the second memory is the same as a size of the first storage space. The memories are coupled in parallel with the controller circuit, and the controller circuit assigns at least one first data zone to the first storage space and the second memory based on a kernel of the system platform, and assigns a second data zone to the second storage space. A data access frequency of the second data zone is lower than a data access frequency of the at least one first data zone.

Abstract: Systems and processes for managing memory compression security to mitigate security risks related to compressed memory page access are disclosed herein. A system for managing memory compression security includes a system memory and a memory manager. The system memory includes an uncompressed region configured to store a plurality of uncompressed memory pages and a compressed region configured to store a plurality of compressed memory pages. The memory manager identifies a memory page in the uncompressed region of the system memory as a candidate for compression and estimate a decompression time for a compressed version of the identified memory page. The memory manager determines whether the estimated decompression time is less than a constant decompression time. The memory manager, based on a determination that the estimated decompression time is less than the constant decompression time, compresses the memory page and writes the compressed memory page in the compressed region.

Abstract: Methods, computing systems and computer program products implement embodiments of the present invention that include configuring a storage system to store multiple storage entities for access by one or more host computers in communication with the storage system, and specifying a compression condition including a minimum compression ratio. The storage system can then estimate an expected compression ratio for a given storage entity, compress the given storage entity upon the expected compression ratio meeting the compression condition, and provide, to a given host computer, access to the compressed given storage entity.

Abstract: A mobile device for electronic document collaboration is disclosed. The mobile device includes a display, a processor and a storage device. The mobile device presents a first message to prompt a first user to start recording on the mobile device in order to capture at least one of audio and video information on the mobile device. After the first user has completed the recording on the mobile device, the mobile device then presents a second message to prompt a second user to start recording on the mobile device to capture at least one of audio and video information on the mobile device. The processor determines whether or not the two recordings were performed within a predetermined time interval. If the two recordings were performed within a predetermined time interval, the processor merges the two recordings into one media document, and the media document is then stored within the storage device.

Abstract: In one embodiment, a method is provided for adapting a host transfer rate between a host and a tape drive to a medium transfer rate between the tape drive and a tape. A data compression rate of untransferred data in a buffer of a tape drive is measured. A change in a future host transfer rate is predicated based on the measured compression rate. A host transfer rate between a host and the tape drive is adapted to a medium transfer rate between the tape drive and a tape, based on the predicted change.

Abstract: A memory system includes a memory device and a memory controller. The memory device includes a plurality of memory dies having different page sizes. The memory controller generates a plurality of chip selection signals for activating the plurality of memory dies based on the reordering number of requests received from a processor.

Abstract: The flash memory controller compresses data in response to a write request. On condition that there is a compression effect with respect to the compressed data, the flash memory controller writes the compressed data to the base area of a physical block of a flash memory. As physical pages assigned to the physical block, the flash memory controller reduces the physical pages assigned to the base area from 102 down to 59, and increases the physical pages assigned to the update area from 26 up to 69. Therefore, it is possible to suppress exhaustion of physical pages which are assigned to the update area, to reduce the number of erases of the physical block, and to consequently prolong device operating life.

Abstract: A mechanism is provided for determining storage device speed based on a ratio of data compression. A bandwidth (B) is identified between a storage device accessing storage medium and a host application requesting access to data on the storage medium. A host side transfer rate is identified, where the host side transfer rate (HSTR) is a rate of data transfer between the host application and the storage device. For each data set in a set of data sets of a record, a ratio of data compression (R) is identified for the data set; a compression considered host side transfer rate (CCHSTR) is determined; and the storage device speed is set to the compression considered host side transfer rate (CCHSTR) for transmitting the data set to the host application.

Abstract: A processing unit performs a method including controlling a reading-out of data from a first storage medium at a predetermined read-out data rate to produce inputted data, and controlling a compression of the inputted data to produce first compressed data of a first compressed format. The method includes controlling a storage of the first compressed data in a second storage medium at a faster writing data rate than the predetermined read-out data rate, controlling a reading-out of second compressed data of a second compressed format from the second storage medium, and controlling a decompression of the second compressed data to produce decompressed data. The method also includes controlling simultaneously the storage of the first compressed data in the second storage medium, the reading-out of the second compressed data from the second storage medium, and audibly reproducing the decompressed data. The first compressed format is different from the second compressed format.

Abstract: A method to read information from an information storage medium using a read channel, where that read channel includes a data cache, where the method generates an analog waveform comprising the information, provides that analog waveform to a read channel generates a digital signal from that analog waveform using one or more first operating parameters, corrects that digital signal at an actual error correction rate, determines if the actual error correction rate is greater than an error correction rate threshold. If the actual error correction rate exceeds the error correction rate threshold, then the method captures the digital signal, stores that captured data in a data cache, reads that digital signal from the cache, generates one or more second operating parameters, provides those one or more second operating parameters to the read channel.

Abstract: A processing unit performs a method including controlling a reading-out of data from a first storage medium at a predetermined read-out data rate to produce inputted data, and controlling a compression of the inputted data to produce first compressed data of a first compressed format. The method includes controlling a storage of the first compressed data in a second storage medium at a faster writing data rate than the predetermined read-out data rate, controlling a reading-out of second compressed data of a second compressed format from the second storage medium, and controlling a decompression of the second compressed data to produce decompressed data. The method also includes controlling simultaneously the storage of the first compressed data in the second storage medium, the reading-out of the second compressed data from the second storage medium, and audibly reproducing the decompressed data. The first compressed format is different from the second compressed format.

Abstract: A processing unit performs a method including controlling a reading-out of data from a first storage medium at a predetermined read-out data rate to produce inputted data, and controlling a compression of the inputted data to produce first compressed data of a first compressed format. The method includes controlling a storage of the first compressed data in a second storage medium at a faster writing data rate than the predetermined read-out data rate, controlling a reading-out of second compressed data of a second compressed format from the second storage medium, and controlling a decompression of the second compressed data to produce decompressed data. The method also includes controlling simultaneously the storage of the first compressed data in the second storage medium, the reading-out of the second compressed data from the second storage medium, and audibly reproducing the decompressed data. The first compressed format is different from the second compressed format.

Abstract: An information-processing apparatus includes a processing unit that compresses inputted data to produce compressed data of a first compressed format. The information-processing apparatus also includes a storage unit that stores the compressed data in a storage medium. The processing unit decompresses data, stored in the storage medium, of a second compressed format to produce decompressed data. Further, the processing unit controls the storage unit to store the compressed data of the first compressed format in the storage medium while the processing unit simultaneously decompresses the data, stored in the storage medium, of the second compressed format and reproduces the decompressed data. The first compressed format is different than the second compressed format.

Abstract: A method and apparatus to read information from an information storage medium using a read channel, where that read channel includes a data cache. The invention generates an analog waveform comprising the information, and provides that analog waveform to a read channel, and generates a digital signal from that analog waveform using one or more first operating parameters. The method error corrects that digital signal at an actual error correction rate, and determines if the actual error correction rate is greater than an error correction rate threshold. If the actual error correction rate exceeds the error correction rate threshold, then the method captures the digital signal, stores that captured data in a data cache, reads that digital signal from the cache, generates one or more second operating parameters, and provides those one or more second operating parameters to the read channel.

Abstract: A digital information receiving apparatus and method in which a receiver receives a digital signal including a video signal and an audio signal, wherein the received video signal is bit-compressed by a first compression method and the received audio signal is bit-expanded by a second compression method which is different from the first compression method, a demodulator demodulates the received digital signal, and an expander bit-expands the demodulated digital signal.

Abstract: A method and apparatus to read information from an information storage medium using a read channel, where that read channel includes a data cache. The invention generates an analog waveform comprising the information, and provides that analog waveform to a read channel, and generates a digital signal from that analog waveform using one or more first operating parameters. The method error corrects that digital signal at an actual error correction rate, and determines if the actual error correction rate is greater than an error correction rate threshold. If the actual error correction rate exceeds the error correction rate threshold, then the method captures the digital signal, stores that captured data in a data cache, reads that digital signal from the cache, generates one or more second operating parameters, and provides those one or more second operating parameters to the read channel.

Abstract: A method for digital information including at least one of digital video information and digital audio information to a transmission path. The method includes compressing the digital video information by a first compression method, bit compressing the digital audio information by a second compression method which is different from the first compression method, and adding error-detection information to both the digital video information and the digital audio information.

Abstract: A signal reconstruction technique is used to correct for wow and flutter in analog audio recordings. Elements of the recording are used to generate a signal for correcting the output. Involves locating modulated entities such as bias signal (e.g. frequency-modulated, amplitude-modulated, or phase-modulated entities) in the recording, extracting them, and utilizing them as a carrier to synchronize to a master clock, using the irregularity of the anomaly to indicate the speed and pitch information to be corrected. A carrier frequency is determined and applied to a digitized form of the recording. This may be performed even in the absence of a prescribed reference code or tone, such as a pilot tone laid down purposefully at the moment of recording. In the case of signals presumed to have an error in the carrier, a corresponding signal is buffered, and in the case of a presumed error, a last known signal is used for the duration of the error.

Abstract: A method and apparatus for transmitting and receiving digital information including video information and audio information. The video information is compressed by a first compression method and the audio information is compressed by a different second compression method for transmission on a transmission path.

Abstract: A method and apparatus for transmitting and receiving digital information including video information and audio information. The video information is compressed by a first compression method and the audio information is compressed by a different second compression method for transmission on a transmission path.

Abstract: A method and apparatus to read information from an information storage medium using a read channel, where that read channel includes a data cache. The invention generates an analog waveform comprising the information, and provides that analog waveform to a read channel, and generates a digital signal from that analog waveform using one or more first operating parameters. The method error corrects that digital signal at an actual error correction rate, and determines if the actual error correction rate is greater than an error correction rate threshold. If the actual error correction rate exceeds the error correction rate threshold, then the method captures the digital signal, stores that captured data in a data cache, reads that digital signal from the cache, generates one or more second operating parameters, and provides those one or more second operating parameters to the read channel.

Abstract: Systems and associated methods provide a level of indirection between multiple host computers and multiple data storage resources, such as removable media data storage devices. At least one of the hosts is not provided with direct access to some of the removable media data storage devices. Instead, logical addresses are provided to the host computers, where the logical addresses can relate to physical addresses associated with the data storage resources. A data storage resource handle or logical proxy may be presented to a host, and a management layer determines whether the host receives access to physical data storage resources, or virtual resources that emulate the physical resources.

Abstract: High-rate writing of data recorded on a CD into a hard disk drive (HDD) is performed while reproducing data read out of the CD at the standard bit rate prescribed for the CD. PCM data corresponding to a playback time of 10 seconds, for example, is read out of a CD and stored in a memory. The data is read out of the memory at appropriate timing and outputted after being converted into an analog audio signal by a D/A converter. In parallel, data for writing is read out of the CD in succession to reading of the data for playback and stored in the memory. The data read out of the memory is coded and compressed by an encoder and then stored in the memory. The compressed data is read out of the memory in units of a certain amount suitable for writing in an HDD and then written in the HDD.

Abstract: An apparatus for receiving digital information including a receiver which receives the digital information that has digital video information bit-compressed by a first compression system, digital audio information bit-compressed by a second compression system, and error-detection information added to both the digital video information and the digital audio information. There is also provided a demodulator which demodulates the digital information received by the receiver, an error detector which detects an error of digital information demodulated by the demodulator by use of the error-detection information, a first expander which bit-expands video information among the digital information error detected by the error detector corresponding system, and a second expander which bit-expands audio information among the digital information error detected by the error detector corresponding to the second compression system.

Abstract: A transmitting apparatus and method for transmitting a digital signal in which a time-base compressor compresses the digital signal, a bit compressor compresses the time-base compressed signal from the time-base so that a transmission rate of the time-base compressed signal from the time-base compressor is higher than a transmission rate of the bit-compressed signal from the bit-compressor, and a transmitter transmits the bit compressed signal.

Abstract: A data accumulating apparatus, comprising: storage media; receiving means for receiving digital raw data about specific information from an external electronic device; first accumulating means for accumulating the digital raw data received by the receiving means into the storage media; producing means for producing first data equal to the digital raw data accumulated in the storage media; compressing means for compressing the first data produced by the producing means to produce coded data in association with the digital raw data accumulated in the storage media; and second accumulating means for accumulating the digital coded data produced by the compressing means into the storage media.

Abstract: High rate writing of data recorded on a CD into a hard disk drive (HDD) is performed while reproducing data read out of the CD at the standard bit rate prescribed for the CD. PCM data corresponding to a playback time of 10 seconds, for example, is read out of a CD and stored in a memory for subsequent read out. In parallel, data for writing is read out of the CD and stored in the memory. The data read out of the memory is coded and compressed by an encoder and then stored back in the memory. When the data stored in the memory for playback has become smaller than a predetermined amount, an interrupt is generated during the writing process with the processing, which is given top priority, so that a next set of playback data is read out of the CD and stored in the memory.

Abstract: An apparatus and method for transmitting and receiving digital information includes a transmitting part for transmitting digital video information and digital audio information and receiving part for receiving digital video information and digital audio information. The transmitting part includes a first compressor for digital video information, a second compressor for digital audio information, a parity signal adder, a modulator, and a transmitter. The receiving part includes a receiver which receives digital information which is digital video information bit-compressed by a first compression system plus digital audio information bit-compressed by a second compression system, and to which has been added a parity signal for error detecting, phase-modulated and transmitted to a transmission path; a demodulator; an error detector, a first expander which bit-expands video information, and a second expander which bit-expands audio information.

Abstract: An apparatus for at least receiving digital information including digital video information bit-compressed by a first compression system plus digital audio information bit-compressed by a second compression system and transmitted to a transmission path. The receiver apparatus includes a receiver which receives the transmitted digital information, a demodulator which demodulates the digital information received by the receiver, an error detector which detects an error of a digital information demodulated by the demodulator by use of a parity signal, a first expander which bit-expands video information among digital information error detected by the error detector corresponding to the first compression system and a second expander which bit-expands audio information among digital information error detected by the error detector corresponding to the second compression system.

Abstract: A digital magnetic recording/reproducing device for recording or reproducing plural sorts of audio data, and a recording/reproducing method therefor. The digital magnetic recording/reproducing device includes an analog-to-digital (A/D) and digital-to-analog (D/A) converter for converting an audio analog signal into digital data or vice versa, a formatter/deformatter for converting a format of the audio signal and the data grouped to be stored in the recording sectors of the magnetic tape, a recording selection unit for transmitting the input audio signal to the A/D converter or formatter according to the type of the audio signal, and a reproduction selection unit for transmitting the data reproduced from the magnetic tape to the D/A converter or deformatter. The output data from the A/D converter and the output data from the formatter are recorded on the different recording sectors of the magnetic tape.

Abstract: A disk drive system including one or more platters, each platter supporting at least one recording surface, where the platters are aligned about a common central axis. The platters spin about the common central axis. A recording head is associated with each recording surface. An actuator mechanism couples to each recording head to move the recording head into proximity with selected portions of the recording surface in response to received commands. At least two replicates of data are stored in at least two data storage areas such that any one of the at least two replicates can be accessed to service a data access request.

Abstract: A digital signal recording/reproducing apparatus having a mode for recording a compressed input signal on a recording medium and a mode for recording a non-compressed input signal on the recording medium. The apparatus include input circuits which input a digital compressed signal and an analog non-compressed signal, an A/D converter, a data compressor, a mode change-over circuit which changes-over the mode, and a selector which selects either a digital compressed signal from the data compressor or a digital compressed signal from the input circuit. A recorder records a recording signal to a recording medium and a reproducer.

Abstract: An input signal is recorded in a recording tape ? by converting the input signal to a record signal through the modulation performed at the timing corresponding to the previously-specified number of tracks per division of signal by using input-signal converting means 1,2, 3, and 10 and then rotating a head cylinder 8 at a revolving speed lower than the revolving speed of the head cylinder 8 corresponding to the timing for modulation and corresponding to a recording rate adjusted by the recording-rate adjusting means 12 by using recording means 7, 8, 9, 10, and 11. Thereby, it is possible to make the configuration of a head cylinder same even for a system in which the number of tracks per division of signal differs due to the difference in compressibility.

Abstract: A system for scaling resolution of an input stream includes an input for receiving the image input stream which passes the image input stream to a frame buffer. The frame buffer holds one or more image frames such that a router can decorrelate the image input stream. Decorrelation may be accomplished by spatially transforming the frames of the input image stream into frequency components, temporally transforming frames of the input image stream or through color component decomposition. The decorrelated components are each passed to a processor which performs quantization and entropy encoding of the components. Each of the compressed components are passed to memory for storage. Thus, real-time throughput can be increased above the rate of the individual processing elements through decorrelation.

Abstract: A tape drive unit has a data compression engine coupled to an incoming data stream. A buffer memory stores data of the incoming data stream. A control module enables or disables the data compression engine in response to a function of the data occupancy level of the buffer memory.

Abstract: Method and apparatus for recording digital data transport stream units such as application packets in sectors of a disk type recording medium such as a digital versatile disk and create and record management information for the recorded transport stream units. In case that a single transport stream unit is divided and then recorded across two sectors, header information of the preceding sector including management information which is created corresponding to each transport stream unit is generated, and the size of the header information and transport stream units to be recorded in the preceding sector is compared with the size of a sector. If the size difference is 1 byte, an invalid header data distinguishable from normal application header extension information is inserted to maintain the correspondence between each transport stream unit to be recorded in the preceding sector and its management information.

Abstract: A tape drive apparatus employing, as a recording medium, a tape cassette (1) including a memory (4) in a cassette half unit (6) having accommodated a magnetic tape (3). When recording the application data on the magnetic tape (3), the application data to be recorded on the magnetic tape (3) is written in an area of a preset size of the memory (4), beginning from the leading end of the application data to be recorded on the magnetic tape (3). In this manner, at least the management information located at the leading end of the application data can be stored in the memory (4). In reproducing the application data from the tape cassette (1), the management information stored in the memory (4) is exploited to save time for accessing the management information recorded on the magnetic tape (3) to speed up the accessing to the data recorded on the magnetic tape (3).

Abstract: The invention relates to a digital-signal processing apparatus for playing back a digital signal recorded on a recording medium, wherein the digital signal is recorded onto the recording medium by delimiting the digital signal at predetermined time intervals into blocks and then processing each of the blocks to convert the digital signal into at least first coefficient data prescribing the amplitude of the digital signal or first coefficient data prescribing the amplitude of a component obtained as a result of conversion of the digital signal and second coefficient data for prescribing the waveform of the digital signal in conjunction with the first coefficient data, and the digital-signal processing apparatus selectively updates the first coefficient data of the digital signal recorded on the recording medium.

Abstract: A dubbing apparatus to dub data managed per program like audio data such as a piece of music is provided. In the dubbing apparatus, for passing output data read from a CD through a CD drive for compression of the data and transferring the compressed data for recording to an HD drive, an HD TOC being breakpoint information is generated based on specified information indicative of a track break of output data read from the HD drive. The HD drive generates a FAT based on the HD TOC. In the HD drive, the dubbed data can be managed per track accurately and properly without having to monitor any information indicative of each track break such as sub Q data synchronously with a stream of dubbing data.

Abstract: An apparatus and method for transmitting and receiving digital information includes a transmitting part for transmitting digital video information and digital audio information and receiving part for receiving digital video information and digital audio information. The transmitting part includes a first compressor for digital video information, a second compressor for digital audio information, a parity signal adder, a modulator, and a transmitter. The receiving part includes a receiver which receives digital information which is digital video information bit-compressed by a first compression system plus digital audio information bit-compressed by a second compression system, and to which has been added a parity signal for error detecting, phase-modulated and transmitted to a transmission path; a demodulator; an error detector, a first expander which bit-expands video information, and a second expander which bit-expands audio information.

Abstract: A hard disk drive for a computer system has at least two actuators for reading data from or writing data to the disks. The actuators may be configured to support the different methods of data access required of them. For example, if large quantities of sequential data are performed, one operation uses both actuators to increase throughput. However, if mostly random operations are to be performed, then independent usage of the actuators is preferred. These two methods of usage can be supported simultaneously, and can even be dictated by the user. The tracking format of the actuators can be configured such that the next logical track is physically located under a head on a different actuator to improve sequential operation. The actuators also may be utilized in a dual-channel configuration so that data can be written to both actuators at the same time, or read back at the same time to improve throughput. In addition, either of these configurations can be selected on a transfer-by-transfer basis by the user.

Abstract: A disk device having access to a disk in different writing modes includes a host PC. The host PC sends a command including a data transfer rate to a controller (disk drive). When the command designating the data transfer rate is received, the writing mode employed for writing data to a disk is automatically switched. The host PC already has the transfer rate to be sent. It is unnecessary to newly prepare a special command to notify the controller in order for switching between the writing modes. Therefore, versatility will not be impaired.

Abstract: A compression system stores meta-data in the compressed record to allow better access and manage merging data. Markers are added to the compression stream to indicate various things. Each compressed record has a marker to indicate the start of the compressed data. These markers have sector number as well as the relocation block numbers embedded in their data. A second marker is used to indicate free space. When compressed data is stored on the disk drive, free space is reserved so that future compression of the same, or modified, data has the ability to expand slightly without causing the data to be written to a different location. Also the compressed data can shrink and the remaining space can be filled in with this free space marker. A third type of marker is the format pattern marker. Compression algorithms generally compress the format pattern very tightly. However, the expectation is that the host will write useful data to the storage device.

Abstract: An apparatus and method for transmitting and receiving digital information includes a transmitting part for transmitting digital video information and digital audio information and receiving part for receiving digital video information and digital audio information. The transmitting part includes a first compressor for digital video information, a second compressor for digital audio information, a parity signal adder, a modulator, and a transmitter. The receiving part includes a receiver which receives digital information which is digital video information bit-compressed by a first compression system plus digital audio information bit-compressed by a second compression system, and to which has been added a parity signal for error detecting, phase-modulated and transmitted to a transmission path; a demodulator; an error detector, a first expander which bit-expands video information, and a second expander which bit-expands audio information.

Abstract: A digital information transmitting, receiving and/or recording/reproducing system, provided with the digital information transmitting apparatus for transmitting the digital information to a transmission path, a receiving apparatus for receiving the transmitted digital information and a recording/reproducing apparatus for the recording received digital information to a recording media and reproducing therefrom. The apparatus includes a compressor which compresses the digital information, a transmission parity signal adder which adds a transmission parity signal to the output signal of the compressor in order to correct an error occurring in the transmission path, wherein the transmission parity signal is different from a record parity signal to be added at the recording apparatus and a transmitter which transmits the transmission parity signal added compressed digital information added by the transmission parity signal adder to the transmission path.

Abstract: To code and record new information to be recorded on DVD-R/W 1 on which old information is already coded and recorded, an old coding parameter used to code the old information is aquired (step S6, S8, S10, S11), a new coding parameter used to code the new information is set so as to continue with the aquired old coding parameter (step S14, S15, S21, S22, S23), and the new information is coded using the setup new coding parameter and is recorded.

Abstract: An improved virtual tape storage device that can store an image of a virtual tape volume either as a stacked image or as a native image that is essentially indistinguishable from the image that would have been written had the host written the volume directly to the tape.

Abstract: During recording, a multilingual indication is generated when at least two of the audio channels of a digital audio signal are associated with a common program, and the multilingual indication is combined with the digital audio signal. During reproduction, a display is activated when a multilingual indication indicates that at least two of the audio channels included in a digital audio signal are associated with a common program.

Abstract: A digital information transmitting apparatus includes a first bit-compressor for bit-compressing a digital video information by a system of discrete cosine transform and a second bit-compressor for bit-compressing a digital audio information by a different system from the system of the first bit-compressor. A parity signal adder is provided for adding a parity signal to the bit-compressed digital video information from the first bit-compressor and the bit-compressed digital audio information from the second bit-compressor, in order to correct an error which occurs in a transmission path. A modulator is provided for phase-modulating the bit-compressed digital video information and the bit-compressed audio information, to which the parity signal has been added by the parity signal adder, and a transmitter ig provided for transmitting the modulated and parity signal added bit-compressed digital video information and bit-compressed digital audio information from the modulator, to the transmission path.