Described is a tape library system that generally comprises a plurality of tape drives and a data bus that links a host computer system to a first tape drive address and a second tape drive address. However, the first tape drive address points to a first controller and switch system that assumes the identity of one of the tape drives. The first controller and switch system is linked to a first tape drive adapted to cooperate with a first type of tape cartridge and a second tape drive adapted to cooperate with second type of tape cartridge. The second tape drive address points to a second controller and switch system that assumes the identity of a different one of the tape drives. The second controller and switch system is linked to a third tape drive adapted to cooperate with the first type of tape cartridge and a third tape drive adapted to cooperate with the second type of tape cartridge.

A method for recording parity data of data stripes within shingled media recording bands in a redundant array of independent disks can be accomplished using a plurality of shingled media recording (SMR) hard disk drives (HDD) each with a plurality of shingled data bands. A data stream received from a host computer system is sequentially stored to a plurality of block segments in successive order, one stripe at a time successively. Each of the shingled data bands possess n data blocks (or multiple data blocks that are grouped together as a data unit) that are successively ordered, each corresponding successive data block from all of the SMR HDDs defines a data stripe, accordingly n data blocks in each SMR HDD defines n stripes across the shingled data bands. A transaction group sync triggers a halt to writing the data stream. The rest of the data stripe is written with fill bits. Parity data is written to a parity drive in one or more SMR parity blocks that correspond in size and sequence to the data blocks in the data stripes possessing the first data stream and any of the fill bits.

A waveform data structure includes a plurality of types of frames having different data sizes. Each of the plurality of types of frames includes an auxiliary information area and a data area. The auxiliary information area includes an area for storing common effective-bit length data for a section of waveform samples, and an area for storing an identifier for identifying one of the plurality of types of frames. The data area is an area for storing extracted waveform samples which are extracted from the waveform samples based on the common effective-bit length. The number of the extracted waveform samples is determined based on the common effective-bit length.

There is provided a signal processing apparatus and a signal processing method capable of allowing data recorded at a high density to be robustly reproduced. A frame sync (FS) is restored by performing maximum likelihood decoding of the FS according to a time-varying trellis with a state and a state transition being limited according to a time, in maximum likelihood decoding of a reproduction signal reproduced from a disk-shaped recording medium, the FS representing a head of a frame, the FS of the frame being arranged at the head of the frame, the FS being recorded at the same positions in a track direction in two adjacent tracks.

A data storage device is disclosed comprising a head actuated over a disk surface comprising a first magnetic recording layer and a second magnetic recording layer. Data is encoded into a codeword comprising a plurality of non-binary symbols wherein each symbol represents one of a plurality of symbol values comprising a first symbol value, a second symbol value, and a third symbol value. The first symbol value is written to the disk surface by magnetizing the first and second magnetic recording layers, and the second symbol value is written to the disk surface by magnetizing the first magnetic recording layer without substantially affecting the magnetization of the second magnetic recording layer. The encoding into the codeword codes out at least one sequence of symbol values to prevent an ambiguity between detecting the first symbol value and the second symbol value during a read operation.

Some examples include receiving audio content through a microphone of an electronic device and determining whether embedded data is included in the received audio content. The electronic device may decode the received audio content to extract the embedded data. In addition, the electronic device may perform at least one of: sending a communication to a computing device over a network based on the extracted embedded data, or presenting information on a display of the electronic device based on the extracted embedded data.

Some examples include receiving audio content through a microphone of an electronic device and determining whether embedded data is included in the received audio content. The electronic device may decode the received audio content to extract the embedded data. In addition, the electronic device may perform at least one of: sending a communication to a computing device over a network based on the extracted embedded data, or presenting information on a display of the electronic device based on the extracted embedded data.

A method includes storing a data group in a first zone of a plurality of radial zones of a data storage disc. Each different one of the plurality of zones has a different throughput level. The method further includes obtaining information related to an access frequency of the data group stored in the first zone of the plurality of zones. Based on the information related to the access frequency of the data group and the different throughput levels of the different zones, a determination is made as to whether to migrate the data group from the first zone of the plurality of zones to a second zone of the plurality of zones.

It is determined, when a region of a moving object detected from an image overlaps a fixed region in the image, whether to superimpose a first mask image to be drawn in the region of the moving object on a second mask image to be drawn in the fixed region, based on an image feature amount of the region of the moving object. The drawing of the first mask image is controlled in accordance with this determination result.

It is determined, when a region of a moving object detected from an image overlaps a fixed region in the image, whether to superimpose a first mask image to be drawn in the region of the moving object on a second mask image to be drawn in the fixed region, based on an image feature amount of the region of the moving object. The drawing of the first mask image is controlled in accordance with this determination result.