Abstract: A media storage and playback apparatus encrypts header fields and side-information fields within respective packets of a compressed, packetized media file to obfuscate unencrypted payload fields within the packets. After encrypting the header fields and side-information fields, the media storage and playback apparatus stores the encrypted header fields and side-information fields together with the unencrypted payload fields within a nonvolatile storage for later retrieval, decryption and playback.

Abstract: A computing device reorders an iteratively executed sequence of instructions such that constituent instructions that require longer execution time than other constituent instructions are grouped together. The computing device inserts, within the iteratively executed sequence of instructions, one or more additional instructions to enable parallel execution of two or more instances of the sequence of instructions such that the constituent instructions that require longer execution time will be executed concurrently with the other constituent instructions.

Abstract: A phase vocoder executes a fast-Fourier transform (FFT) with respect to an input audio data stream to generate an array of frequency-domain values corresponding to respective frequencies that are nominally uniformly distributed across a frequency range of interest, each of the frequency-domain values being representative of amplitude and phase of a spectral component of the input audio data stream at the respective frequency. The phase vocoder scales the nominally uniform distribution of the respective frequencies to reduce a cumulative error across the frequency distribution resulting from finite precision of a digital representation and then implements at least one of a time-stretching operation or a pitch-shifting operation with respect to the input data stream by manipulating the frequency-domain values with respect to one another within the array.