Patent application number | Description | Published |
20110225474 | METHOD AND APARATUS FOR ERASURE DECODING AN ECC CODED BITSTREAM - The error correction capability of block codes can be doubled if error locations are known. Prior art approaches for error location detection always involve adding dedicated redundant data which then are evaluated to yield error location information. The present invention proposes and describes how error location information in the form of clues is derived from given DC control bits that are anyway present in a data stream. | 09-15-2011 |
20130073065 | METHOD AND APPARATUS FOR DETECTING WHICH ONE OF SYMBOLS OF WATERMARK DATA IS EMBEDDED IN A RECEIVED SIGNAL - Watermark symbol detection requires a detection metric for deciding at decoder side which candidate symbol is embedded inside the audio or video signal content. The invention provides an improved detection metric processing that achieves a reliable detection of watermarks in the presence of additional noise and echoes, and that is adaptive to signal reception conditions and requires a decreased computational power. This is performed by taking into account the information contained in the echoes of the received audio signal in the decision metric and comparing it with the corresponding metric obtained from decoding a non-marked audio signal, based on recursive calculation of false positive detection rates of Correlations for all REFP Reference Pattern peaks in correlation result values. The watermark symbol corresponding to the reference sequence having the lowest false positive error is selected as the embedded one. | 03-21-2013 |
20130155827 | METHOD AND SYSTEM FOR DETERMINING THE QUALITY OF A STORAGE SYSTEM - In accordance with an exemplary embodiment of the present invention, a method for measuring a quality parameter of an optical storage system comprising a non-diffraction-limited optical storage medium and a readout device, the method comprising the process of deriving an impulse response of the optical storage system, and the process of analyzing the impulse response to determine at least one of a width of the impulse response and a skewness of the impulse response as the quality parameter. | 06-20-2013 |
20140006790 | METHOD AND APPARATUS FOR WATERMARKING AN AC-3 ENCODED BIT STREAM | 01-02-2014 |
20150062642 | METHOD AND APPARATUS FOR STORING DATA - A method and an apparatus for storing data as a coded two-dimensional pattern of pixels on a photographic medium are described. An image representative of the data to be stored is divided into a two-dimensional array of blocks. A representative color value is determined for each block to obtain a two-dimensional array of representative color values. At least part of the data to be stored is coded such that the resulting coded two-dimensional pattern of pixels resembles the two-dimensional array of representative color values. The coded two-dimensional pattern of pixels is printed onto the photographic medium. | 03-05-2015 |
20150221317 | METHOD AND APPARATUS FOR WATERMARKING SUCCESSIVE SECTIONS OF AN AUDIO SIGNAL - Audio watermarking is the process of embedding watermark information items into an audio signal in an in-audible manner. In a first embodiment, in case the original audio signal has parts of low signal energy, an alternative signal having a level or strength given by the psycho-acoustic model is combined with the original audio signal. The combined signal is watermarked with watermark data to be embedded. In a second embodiment, in case the original audio signal has parts of low signal energy, an alternative signal having a level or strength given by the psycho-acoustic model is watermarked with watermark data to be embedded, and the audio signal is watermarked with the watermark data to be embedded. The watermarked alternative signal is combined with the watermarked audio signal. | 08-06-2015 |
20150248892 | METHOD AND APPARATUS FOR DETERMINING AN OPTIMUM FREQUENCY RANGE WITHIN A FULL FREQUENCY RANGE OF A WATERMARKED INPUT SIGNAL - Many watermarking detection algorithms are correlation based, whereby an input signal is correlated with reference signals. The correlation with the best match determines the bit value of the watermark information. Usually a watermarked signal undergoes distortion before being fed to a watermark detector. However, the modification is stronger in some frequency ranges than in others. According to the invention, the correlation result for a current input signal section is in addition used for estimating the optimal frequency range or ranges for the following section's correlation, using a cumulative correlation value curve. | 09-03-2015 |