Patent application number | Description | Published |
20130114847 | EXTRACTION OF EMBEDDED WATERMARKS FROM A HOST CONTENT USING A PLURALITY OF TENTATIVE WATERMARKS - Methods, devices and computer program products facilitate the extraction of embedded watermarks in the presence of content distortions. Distortion of the content is estimated using two or more detected watermarks with an associated probability of false detection that is above a desired level. The estimated content distortion is used to obtain pre-distorted synchronization templates and to reevaluate the detected watermarks. The use of pre-distorted synchronization templates results in obtaining better estimations of content distortion, and improved reliability of watermark detections. | 05-09-2013 |
20130114848 | EFFICIENT EXTRACTION OF EMBEDDED WATERMARKS IN THE PRESENCE OF HOST CONTENT DISTORTIONS - Methods, devices and computer program products facilitate the extraction of embedded watermarks in the presence of content distortions. Coarse estimates of a distortion or combination of distortions, present in the host content are obtained by detecting a tentative watermark, or a portion thereof, utilizing coarse pre-distorted watermark templates. Supplementary pre-distorted watermark templates are then selected in the neighborhood of the coarse distortion estimate to further re-evaluate the tentative watermark. The use of coarse and supplementary pre-distorted watermark templates results in obtaining better estimations of content distortions, and improved reliability of watermark detections in an efficient manner. | 05-09-2013 |
20130117570 | WATERMARK EXTRACTION BASED ON TENTATIVE WATERMARKS - Methods, devices and computer program products facilitate the extraction of embedded watermarks in the presence of content distortions. Pre-distorted synchronization templates are used to detect synchronization portions of embedded watermark frames. A pre-distorted synchronization template that best matches the synchronization portion of the embedded watermark frame produces an estimation of one or more distortions that are present in the content. The remainder of watermark frame can be evaluated based on the outcome of the comparison. | 05-09-2013 |
20130117571 | EXTRACTION OF EMBEDDED WATERMARKS FROM A HOST CONTENT BASED ON EXTRAPOLATION TECHNIQUES - Methods, devices and computer program products facilitate the extraction of embedded watermarks in the presence of content distortions. Subsequent to the detection of a tentative watermark, particular sections of the content are examined to form one or more extrapolated watermarks or watermark segments. Weights are assigned to the extrapolated watermarks or watermark segments, and used in combination with the detected tentative watermark to collectively assess if a desired probability of false detection is satisfied. | 05-09-2013 |
Patent application number | Description | Published |
20130185063 | MULTIPLE CODING MODE SIGNAL CLASSIFICATION - Improved audio classification is provided for encoding applications. An initial classification is performed, followed by a finer classification, to produce speech classifications and music classifications with higher accuracy and less complexity than previously available. Audio is classified as speech or music on a frame by frame basis. If the frame is classified as music by the initial classification, that frame undergoes a second, finer classification to confirm that the frame is music and not speech (e.g., speech that is tonal and/or structured that may not have been classified as speech by the initial classification). Depending on the implementation, one or more parameters may be used in the finer classification. Example parameters include voicing, modified correlation, signal activity, and long term pitch gain. | 07-18-2013 |
20130191117 | VOICE ACTIVITY DETECTION IN PRESENCE OF BACKGROUND NOISE - In speech processing systems, compensation is made for sudden changes in the background noise in the average signal-to-noise ratio (SNR) calculation. SNR outlier filtering may be used, alone or in conjunction with weighting the average SNR. Adaptive weights may be applied on the SNRs per band before computing the average SNR. The weighting function can be a function of noise level, noise type, and/or instantaneous SNR value. Another weighting mechanism applies a null filtering or outlier filtering which sets the weight in a particular band to be zero. This particular band may be characterized as the one that exhibits an SNR that is several times higher than the SNRs in other bands. | 07-25-2013 |
20140236587 | SYSTEMS AND METHODS FOR CONTROLLING AN AVERAGE ENCODING RATE - A method for controlling an average encoding rate by an electronic device is described. The method includes obtaining a speech signal. The method also includes determining a first average rate. The method further includes determining a first threshold based on the first average rate. The method additionally includes controlling the average encoding rate by determining at least one other threshold based on the first threshold. The method also includes sending an encoded speech signal. | 08-21-2014 |