9results about "Analogue recording" patented technology

The invention discloses a high-integration-level multi-valued tape reading SOC chip architecture and a tape reading method, and the architecture comprises a multi-valued reading module which is used for converting a multi-valued coding analog signal in a tape into a digital signal; the data error correction module is used for detecting and repairing data errors through an error correction algorithm; the data compression module is used for performing compression processing on the data subjected to error correction so as to reduce storage space occupation; the data encryption module is used for encrypting the compressed data based on an encryption algorithm; the interface module is used for transmitting the processed data to external equipment; and the dynamic voltage frequency adjusting module is used for dynamically adjusting the voltage and frequency of the core module according to the system load to reduce the power consumption. According to the invention, high-efficiency signal acquisition, conversion and processing can be realized while high signal reading precision is maintained, the performance and the integration level of a magnetic tape reading system are improved, and low-power-consumption design is added, so that energy consumption is greatly reduced.

Write commands in a shingled magnetic recording (SMR) drive are efficiently executed when a write command and associated write data are received by an SMR HDD from a host while the target SMR band for storing the write data is undergoing a refresh operation. In response to the write command, the HDD suspends the refresh operation, stores the write data in nonvolatile memory, and informs the host that the write command has been completed. After the write data are stored in nonvolatile memory, the HDD resumes the refresh operation, and the remaining unrefreshed data in the target SMR band are refreshed by being rewritten to the spare SMR band. The nonvolatile memory can include the spare SMR band in some instances, the target SMR band in some instances, and in both the spare SMR band and the target SMR band in some instances.

Example control circuitry, data storage devices, and methods to use dual servo channels for burst gain switching are described. The data storage device may include two servo channels, such as the dual channels in a two-dimensional magnetic recording channel, that receive read signals for the same servo sector in parallel. One channel is calibrated to use a gain value for a first portion of the servo pattern, such as the preamble and Gray code for the servo address mark, and the other channel is calibrated to use a different gain value for a second portion of the servo pattern, such as the burst pattern. The resulting signal values may then be combined to determine the position error signal. Both channels may be configured to use different gain values for different portions of the read signal with corresponding gain switching and combining them may use the most reliable portions of each signal.

A hopscotch sound recording and playback system and method for a strip of motion picture film is presented herein. The system and method includes a sound recording assembly configured to record at least two soundtracks onto the strip of motion picture film, between film perforations, and in a laterally and longitudinally offset manner. The system and method also includes a sound playback assembly configured to read the at least two soundtracks by switching or hopscotching between the soundtracks to create an assembled soundtrack. The assembled soundtrack includes alternating sections from the two soundtracks disposed between the perforations on the film.

A playback device (10) (measurement device) in a record playback system (1) including a record player (100) and the playback device (10) measures a frequency characteristic of each of a plurality of input signals which are input from the record player (100) to the playback device (10) when a plurality of test signals for measuring a characteristic of the record playback system (1) are played back by the record player (100), the plurality of test signals being recorded on a phonograph record, the plurality of input signals corresponding to the plurality of test signals recorded; calculates a measurement error between the frequency characteristic of each of the plurality of input signals measured and a predetermined frequency characteristic; selects a frequency characteristic of which the measurement error is smallest from among the frequency characteristics of the plurality of input signals, as a measurement result of the record playback system (1); and outputs the measurement result selected.

Various illustrative aspects are directed to a data storage device including one or more disks, an actuator mechanism configured to position a selected head among one or more heads proximate to a corresponding disk surface among the one or more disks, the selected head comprising a write element and an assistive energy emitter, and one or more processing devices configured to, individually or in combination: apply an assistive energy current to the assistive energy emitter while refraining from applying a write current to the write element, and vary a level of the assistive energy current over time while refraining from applying the write current to the write element.

Example control circuitry, data storage devices, and methods to use dual servo channels for burst gain switching are described. The data storage device may include two servo channels, such as the dual channels in a two-dimensional magnetic recording channel, that receive read signals for the same servo sector in parallel. One channel is calibrated to use a gain value for a first portion of the servo pattern, such as the preamble and Gray code for the servo address mark, and the other channel is calibrated to use a different gain value for a second portion of the servo pattern, such as the burst pattern. The resulting signal values may then be combined to determine the position error signal. Both channels may be configured to use different gain values for different portions of the read signal with corresponding gain switching and combining them may use the most reliable portions of each signal.

Write commands in a shingled magnetic recording (SMR) drive are efficiently executed when a write command and associated write data are received by an SMR HDD from a host while the target SMR band for storing the write data is undergoing a refresh operation. In response to the write command, the HDD suspends the refresh operation, stores the write data in nonvolatile memory, and informs the host that the write command has been completed. After the write data are stored in nonvolatile memory, the HDD resumes the refresh operation, and the remaining unrefreshed data in the target SMR band are refreshed by being rewritten to the spare SMR band. The nonvolatile memory can include the spare SMR band in some instances, the target SMR band in some instances, and in both the spare SMR band and the target SMR band in some instances.