A method for the display of an image in a display area, the method comprising: requesting, from a server, a scrambled image file using an image identifier, the scrambled image file containing the image in a scrambled form; receiving the scrambled image file; dividing the scrambled image file into a plurality of image fragments, the image fragments having a first order within the scrambled image file; and rendering the image fragments on to the display area in a second order derived from the image identifier to display the image in unscrambled form.

A non-transitory tangible recording medium stores recorded AV data. The AV data includes a system stream file played by a playback device and a management information file having management information corresponding to the system stream file. The system stream file includes a first segment including repeated a first data unit that be decrypted using a first decryption key that the playback device individually has and a second data unit that cannot be decrypted by the first decryption key. The system stream file also includes a second segment which can be decrypted using a second decryption key that the playback device has in common with another playback device. The management information file has a start source packet number, which identifies a start source packet out of a plurality of source packets storing an I-picture that is a random access point, and the start source packet is situated in the second segment.

A content recording apparatus includes an obtaining unit which obtains a content having a variable-length packet structure, an encrypter which generates encrypted data by encrypting the content, and a recorder which records the encrypted data in a block unit having a fixed length in a recording medium. The encrypted data includes an invalidated region unnecessary for reproduction of the content. The recorder records a size of the invalidated region in the recording medium.

Embodiments are disclosed for techniques to detect electronic system modification. The techniques include causing an electronic system to perform a predetermined set of routines. The techniques also include generating field scans of the electronic system while the predetermined set of routines is performed. The techniques further include comparing the field scans to baseline scans of the electronic system. Additionally, the techniques include determining that one of the field scans and one of the baseline scans are different. Further, the techniques include identifying at least one difference between the one field scan and the one baseline scan.

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.

Provided are a video recording method and apparatus. The video recording method includes: in response to detecting a resume recording instruction, determining duration of a video coded by a video coder, and setting playback progress of an audio player to the duration, where the resume recording instruction is used for instructing to continue collecting video data and continue playing target audio data by using the audio player; starting the audio player, where the video coder is started before the audio player; in the case of playing the target audio data to the playback progress, in response to collecting the video data, transmitting the collected video data to the video coder so that the video coder codes the collected video data.

Methods, apparatus, systems and articles of manufacture (e.g., physical storage media) to detect media watermarks in magnetic field data are disclosed herein. Example media monitors disclosed herein include a magnetic field estimator to determine first magnetic field data, the magnetic field estimator in communication with a magnetometer. Disclosed example media monitors also include a correlator to correlate the first magnitude field data with a reference sequence to determine second magnetic field data. Disclosed example media monitors further include a watermark decoder to process the second magnetic field data to detect an audio watermark encoded in an audio signal.

Methods, apparatus, systems and articles of manufacture are disclosed for source classification using HDMI audio metadata. An example apparatus includes a metadata extractor to extract values of audio encoding parameters from HDMI metadata obtained from a monitored HDMI port of a media device, the HDMI metadata corresponding to media being output from the monitored HDMI port; map the extracted values of the audio encoding parameters to a first unique encoding class (UEC) in a set of defined UECs, different ones of the set of defined UECs corresponding to different combinations of possible values of the audio encoding parameters capable of being included in the HDMI metadata; and identify a media source corresponding to the media output from the HDMI port based on one or more possible media sources mapped to the first UEC.

The present disclosure allows for unique collection and housing of captured media, and further provides for a unique method of access for stored captured media. In some implementations, the system may use a device's native components, such as a microphone or camera, without using the native operating system. In some embodiments, captured media may be temporarily stored in a local cache until the device connects to a communication network, which may initiate transfer of the captured media to an external server. In some implementations, captured media may be accessible through a unique access mechanism, which may allow for immediate viewing of the captured media without requiring a separate download of the file.

A device for recording videos includes an image signal processor to process frames captured in response to a request for recording a video at a first frame rate, and a video encoder to encode captured frames. The device also includes processing circuitry operative to allocate image buffers from memory in response to the request, and execute a camera software to direct the image signal processor to fill each image buffer with a batch of the captured frames. For each filled image buffer, a reference of the image buffer is passed from the camera software to a video software at a second rate, which is a fraction of the first frame rate. The processing circuitry then executes the video software to provide one frame at a time to the video encoder for encoding at the first frame rate.