A data storage device may be destroyed by suspending a transducing head above a data storage medium prior to inducing contact of the transducing head with a first layer of the data storage medium in response to a signal from a controller. Deflection of the transducing head can then be increased to penetrate to a destroy depth in a second layer of the data storage medium that is maintained while the data storage medium spins. The controller may then issue at least one data read command to access data from the data storage medium and when a data read error is received, the data storage medium and transducing head can be verified as destroyed and incapable of accessing data previously written to the data storage medium.

A method that applies supplementary attribute information to the e-book content is provided. The method includes retrieving the e-book content; identifying objects in the retrieved e-book content; selecting one or more of the objects; defining one or more screen alteration attribute values regarding the selected objects; collecting an application condition for applying the defined screen alteration attribute values to the selected objects; and generating the supplementary attribute information by binding the defined screen alteration attribute values to the selected objects, and an action condition.

A method for playing media data is disclosed, including: transmitting, by a first operating system, a request for processing the media data to a second operating system, the first operating system and the second operating system being installed on a same device; receiving, by the first operating system, processing results from the second operating system, wherein the second operating system is configured to process the media data based at least in part on the request to generate the processing results; and playing the media data by the first operating system based at least in part on the processing results.

To convey information using an audio channel, an audio signal is modulated to produce a modulated signal by embedding additional information into the audio signal. Modulating the audio signal processing the audio signal to produce a set of filter responses; creating a delayed version of the filter responses; modifying the delayed version of the filter responses based on the additional information to produce an echo audio signal; and combining the audio signal and the echo audio signal to produce the modulated signal. Modulating the audio signal may involve employing a modulation strength, and a psychoacoustic model may be used to modify the modulation strength based on a comparison of a distortion of the modified audio signal relative to the audio signal and a target distortion.

A method and apparatus for controlling access to encrypted data is provided. The device comprises: a processor and a memory, the processor configured to: control access to encrypted data, stored at the memory, the encrypted data categorized according to a plurality of categories, using a respective encryption key for each category in the plurality of categories; and, control access to a given encryption key according to given criteria associated with a given category, respective criteria different for each respective category, access to the given encryption key including one or more of, when the respective criteria are met, generating the given encryption key and decrypting the given encryption key.

A method of video encoding is provided to reduce the cost of network DVR storage by building on a concept of Just-In Time (JIT) transcoding which eliminates storing all formats of content in a DVR. A super-encoding procedure is provided that encodes a high resolution format, such as HEVC, while metadata is provided for lower resolution formats, such as MPEG4. The metadata can include items like motion vectors to reduce the computational costs during JIT transcoding. The super-encoded data is stored in memory of the DVR. High resolution encoded data is read directly out of the DVR memory, while lower resolutions are transcoded from the DVR memory data using the metadata to increase efficiency.

Method and device for supplying of a data set stored in a database to supply of a data set, e.g. the content of a copy protected audio CD, which is stored in a database, e.g. to a user PC on which said content of a copy protected audio CD cannot be accessed, the following steps are performed: receiving a serial code of a set of serial codes assigned to said data set, verifying of said received serial code, in case of a positive verification, accessing said data set correspond to said received and positively verified serial code from said database and outputting of at least parts of said accessed data.

An image processing apparatus includes a memory configured to store compressed data; and frame buffer compressing circuitry which includes encoder circuitry configured to compress at least some of source data to generate the compressed data and transmit the compressed data to the memory, and decoder circuitry configured to read and decompress the compressed data from the memory, in which the compressed data includes a payload and a header including actual compressed data and flag, the frame buffer compressing circuitry is configured to reflect a result obtained by comparing an accumulated compressibility corresponding to the compressed data with a reference compressibility in the flag, and is configured to perform compression or decompression in a lossy mode or a lossless mode depending on the flag.

A technique to manage members of a group of decoders having access to broadcast data, each group member sharing a common broadcast encryption scheme (BES) comprising the steps of, in a stage for a decoder to become a group member, receiving keys pertaining to the position in the group according to the BES, receiving a current group access data comprising a current group access key, and in a stage of accessing broadcast data, using the current group access data to access the broadcast data, and in a stage of renewing the current group access key, sending a first group message comprising at lease a next group access key encrypted so that only non-revoked decoders can access it, said group message being further encrypted by the current group access key, updating the current group access key with the next group access key.

A radiographic image processing apparatus includes a hardware processor and an image processor. The hardware processor obtains moving image data captured by a radiographic imaging apparatus, causes a display to display a moving image based on the moving image data, and specifies a part of the moving image data that is to be output to an external device. The image processor performs image processing on the part of the moving image data. The hardware processor outputs, to the external device, the part of the moving image data on which the image processing has been performed by the image processor.