Abstract: Methods, systems, and devices for improving security of media streams are disclosed. The system can receive a decoded media stream from a media decoding pipeline that receives and decodes an encoded media stream. The system can identify, based on the decoded media stream, a set of features to generate, and generate the set of features using the decoded media stream. Such features may include luma histograms, pixel intensity data, motion vectors, edge detection, audio gain, tonal information, pitch information, among other types of features. The system can provide the set of features to a processor executing a machine-learning model, wherein the processor executing the machine-learning model is prevented from accessing the decoded media stream by the device.

Abstract: An adaptive display calibration system includes a display, a photodetector configured to capture light emitted by the display, and a set-top box connected to the display and the photodetector. The set-top box includes processing circuitry configured to transmit one or more test patterns to the display, and receive one or more measurements of the display from the photodetector in response to the test patterns. Additionally, the processing circuitry of the set-top box determines a capability of the display based on the measurements received from the photodetector and programs the set-top box based on the capability of the display.

Abstract: Compounding reproduction errors in the luminance of a pixel encoded by a non-constant luminance video encoder is High Dynamic Range (HDR) video content, which is starting to become more widely supported by commercially available display devices. HDR video content contains information that covers a wider luminance range than traditional, non-HDR video content known as Low Dynamic Range (LDR) video content. The present disclosure is directed to an apparatus and method for reducing errors in reproduced luminance of HDR video content (and other types of video content) at a video encoder and/or video decoder due to non-constant luminance video encoding.

Abstract: Disclosed are various embodiments for transcoding a video stream to facilitate accurate display. An uncompressed video stream comprising a sequence of video frames is obtained. An encoded reverse order video stream is generated from the uncompressed video stream in one embodiment. In another embodiment, the uncompressed video stream includes multiple views, and a compressed video stream is generated from the uncompressed video stream. The compressed video stream excludes one or more of the views.

Abstract: A video transmitter comprising a plurality of encoders may be operable to determine, for a transport stream, a constant overall number of bits per time interval corresponding to a frame in the transport stream. For each time interval corresponding to a start and an end of encoding of each of frames using each of the encoders, the video transmitter may allocate a target number of bits to each of the frames to achieve the constant overall number of bits. The allocation of the target number of bits may be based on frame types of the frames and CODEC types of the encoders, where the allocated target number of bits for each of the frames meets buffer overflow/underflow requirements associated with each of the encoders. A quantization parameter (QP) may be calculated and adjusted at each of one or more layers for generating an actual number of bits during encoding.

Abstract: A video transmitter comprising a plurality of encoders may be operable to determine, for a transport stream, a constant overall number of bits per time interval corresponding to a frame in the transport stream. For each time interval corresponding to a start and an end of encoding of each of frames using each of the encoders, the video transmitter may allocate a target number of bits to each of the frames to achieve the constant overall number of bits. The allocation of the target number of bits may be based on frame types of the frames and CODEC types of the encoders, where the allocated target number of bits for each of the frames meets buffer overflow/underflow requirements associated with each of the encoders. A quantization parameter (QP) may be calculated and adjusted at each of one or more layers for generating an actual number of bits during encoding.

Abstract: A video transmitter comprising a plurality of encoders may be operable to determine, for a transport stream, a constant overall number of bits per time interval corresponding to a frame in the transport stream. For each time interval corresponding to a start and an end of encoding of each of frames using each of the encoders, the video transmitter may allocate a target number of bits to each of the frames to achieve the constant overall number of bits. The allocation of the target number of bits may be based on frame types of the frames and CODEC types of the encoders, where the allocated target number of bits for each of the frames meets buffer overflow/underflow requirements associated with each of the encoders. A quantization parameter (QP) may be calculated and adjusted at each of one or more layers for generating an actual number of bits during encoding.

Abstract: Disclosed are various embodiments for transcoding a video stream to facilitate accurate display. An uncompressed video stream comprising a sequence of video frames is obtained. An encoded reverse order video stream is generated from the uncompressed video stream in one embodiment. In another embodiment, the uncompressed video stream includes multiple views, and a compressed video stream is generated from the uncompressed video stream. The compressed video stream excludes one or more of the views.

Abstract: A system and method digital video encoding. The system may define encoding classes. The system may obtain a digital video picture and assign an encoding region of the digital video picture to an encoding class. The system may determine a bit rate parameter for the encoding region based on the encoding class.

Abstract: A system and method of geometrical predistortion of a graphical source signal is provided in which the graphical source signal is merged with an input video signal for display on a display device. The input video signal is received at a hardware scaler device and a predistorted video signal is generated there from. A warping map is calculated using a programmed processor and a graphics source signal is then predistorted, in software, using the warping map to generate a warped graphical overlay signal. The predistorted video signal from the hardware scaler is then merged with the warped graphical overlay signal from the programmed processor.

Abstract: Systems and methods of motion compensated frame rate conversion are described herein. These systems and methods convert an input video sequence at a first frame rate to an output video sequence at a second frame rate through a novel motion estimation and motion vector processing stage that produces a motion field having a plurality of motion vectors that describe the movement of objects between input video frames from the perspective of an interpolated video frame. A subsequent motion compensated interpolation stage then constructs the interpolated video frame using an adaptively blended combination of a motion compensated prediction and a temporal average prediction of the pixel values from the input video frames.

Abstract: A video transmitter comprising a plurality of encoders may be operable to determine, for a transport stream, a constant overall number of bits per time interval corresponding to a frame in the transport stream. For each time interval corresponding to a start and an end of encoding of each of frames using each of the encoders, the video transmitter may allocate a target number of bits to each of the frames to achieve the constant overall number of bits. The allocation of the target number of bits may be based on frame types of the frames and CODEC types of the encoders, where the allocated target number of bits for each of the frames meets buffer overflow/underflow requirements associated with each of the encoders. A quantization parameter (QP) may be calculated and adjusted at each of one or more layers for generating an actual number of bits during encoding.

Abstract: A system and method of geometrical predistortion of a graphical source signal is provided in which the graphical source signal is merged with an input video signal for display on a display device. The input video signal is received at a hardware scaler device and a predistorted video signal is generated there from. A warping map is calculated using a programmed processor and a graphics source signal is then predistorted, in software, using the warping map to generate a warped graphical overlay signal. The predistorted video signal from the hardware scaler is then merged with the warped graphical overlay signal from the programmed processor.

Abstract: A methodology and structure is described for processing a video signal comprising a plurality of fields. Each of the fields of the video signal are partitioned into a plurality of regions. Statistical measurements are then performed on each field to detect a field-level temporal periodic pattern and on each region within the fields to detect a region-level temporal periodic pattern. The regions in each field are then processed using the field-level temporal periodic pattern and the region-level temporal periodic pattern.

Abstract: A system for enhancing brightness and resolution while correcting certain types of convergence, geometry, color and luminance errors caused by the display device, the viewing position or both. This system involves merging images from two or more sources, overlapping and offsetting pixels, or overlapping scanning lines ‘merged raster’ in a CRT or several (3) ‘merged rasters’ in color CRTs, and adjusting video content and timing, to compensate for the current viewing position and/or device distortion. Display and/or viewing perspective distortion characteristics are measured from the observers viewing position for the raster or each non-converged raster and stored as correction factor data in non-volatile memory. This data is used to modify the digital addressing of video image memory, to read and to correct pixel data for each image, adjust color, modify magnitude, and to drive the displays video amplifier at the correct time with the corrected amplitude and image data.

Abstract: In one embodiment, a method comprises an act of separating a progressive scanned frame into a plurality of fields. The plurality of fields includes at least a first field being a first portion of the progressive scanned frame and a second field being a second portion of the progressive scanned frame. In addition, the method further comprises an act of compressing data associated with the first portion of the progressive scanned frame and the second portion of the progressive scanned frame with interlaced compression logic.

Abstract: A method for generating from an input signal with a predetermined input spatial resolution a high contrast rescaled image having a predetermined output spatial resolution which differs from the input spatial resolution, comprising the steps of generating output samples from input samples of the input signal, detecting predetermined ones of the output samples which occur in excess of a predetermined time threshold from nearest occurring ones of said input samples detecting image details in the input signal at the nearest occurring ones of the input samples, and shifting the predetermined ones of the output samples so as to substantially align with the image details and thereby enhance image contrast of the details.

Abstract: A system for enhancing brightness and resolution while correcting certain types of convergence, geometry, color and luminance errors caused by the display device, the viewing position or both. This system involves merging images from two or more sources, overlapping and offsetting pixels, or overlapping scanning lines “merged raster” in a CRT or several (3) “merged rasters” in color CRT's, and adjusting video content and timing, to compensate for the current viewing position and/or device distortion. Display and/or viewing perspective distortion characteristics are measured from the observers viewing position for the raster or each non-converged raster and stored as correction factor data in non-volatile memory. This data is used to modify the digital addressing of video image memory, to read and to correct pixel data for each image, adjust color, modify magnitude, and to drive the displays video amplifier at the correct time with the corrected amplitude and image data.

Abstract: A method and apparatus for reducing the appearance of moiré in a digitally resized image wherein each input pixel value is mapped to a new value by means of a first correction function prior to being resized. At the output of the resizing engine, each pixel in the resized image is mapped to a further new value by means of a second correction function prior to being displayed. The second correction function is chosen such that the intensity of light output from the display device is substantially proportional to the value of the signal from the resizing engine, taking into account the combined transfer functions of the second correction means and the physical display device (i.e. the second correction function is substantially the inverse of the display transfer characteristic).