Abstract: Presented are a system and method for distributing video over a network. The system includes a source that outputs video with a first frame rate, a transmitter, a receiver, and a sink. The transmitter receives video from the source and processes the video by encoding the video with frame boundary information, packetizing, and transmitting the video. The receiver includes a frame buffer, a timing generator, and a PLL. The receiver receives and processes the video by retrieving the frame boundary information, decoding the video into sub-frames, and writing the sub-frames to the buffer. All the processing occurs on sub-frame portions of the video in sub-frame time intervals. The receiver transmits video with a second frame rate to the sink. The timing generator generates output timing and uses the PLL to synchronize the output timing with the frame boundary information and synchronizes the first and second frame rates.

Abstract: Presented are a system and method for distributing video over a network. The system includes a source that outputs video with a first frame rate, a transmitter, a receiver, and a sink. The transmitter receives video from the source and processes the video by encoding the video with frame boundary information, packetizing, and transmitting the video. The receiver includes a frame buffer, a timing generator, and a PLL. The receiver receives and processes the video by retrieving the frame boundary information, decoding the video into sub-frames, and writing the sub-frames to the buffer. All the processing occurs on sub-frame portions of the video in sub-frame time intervals. The receiver transmits video with a second frame rate to the sink. The timing generator generates output timing and uses the PLL to synchronize the output timing with the frame boundary information and synchronizes the first and second frame rates.

Abstract: The present disclosure provides for a method of pairing wireless devices as well as wireless devices employing the pairing methodology. The wireless devices each possess individual identifiers. The individual identifiers comprise a 64 bit number. Each device also possesses a number of selection indicator identifiers. The selection indicator identifier is a preferably a color comprising a 24 bit number. The individual identifier and selection indicator identifier are combined using a hash function to create a 32 bit hash group identification. A simultaneous holding of buttons on the wireless devices creates the pairing between the devices and stores the 32 bit hash group identification in the device's memory. When two unpaired devices sharing a group identification number are brought within a predetermined proximity to one another, the devices automatically pair.

Abstract: The present disclosure provides for a method of pairing wireless devices as well as wireless devices employing the pairing methodology. The wireless devices each possess individual identifiers. The individual identifiers comprise a 64 bit number. Each device also possesses a number of selection indicator identifiers. The selection indicator identifier is a preferably a color comprising a 24 bit number. The individual identifier and selection indicator identifier are combined using a hash function to create a 32 bit hash group identification. A simultaneous holding of buttons on the wireless devices creates the pairing between the devices and stores the 32 bit hash group identification in the device's memory. When two unpaired devices sharing a group identification number are brought within a predetermined proximity to one another, the devices automatically pair.

Abstract: The present disclosure provides for a method of pairing wireless devices as well as wireless devices employing the pairing methodology. The wireless devices each possess individual identifiers. The individual identifiers comprise a 64 bit number. Each device also possesses a number of selection indicator identifiers. The selection indicator identifier is a preferably a color comprising a 24 bit number. The individual identifier and selection indicator identifier are combined using a hash function to create a 32 bit hash group identification. A simultaneous holding of buttons on the wireless devices creates the pairing between the devices and stores the 32 bit hash group identification in the device's memory. When two unpaired devices sharing a group identification number are brought within a predetermined proximity to one another, the devices automatically pair.

Abstract: The present disclosure provides for a method of pairing wireless devices as well as wireless devices employing the pairing methodology. The wireless devices each possess individual identifiers. The individual identifiers comprise a 64 bit number. Each device also possesses a number of selection indicator identifiers. The selection indicator identifier is a preferably a color comprising a 24 bit number. The individual identifier and selection indicator identifier are combined using a hash function to create a 32 bit hash group identification. A simultaneous holding of buttons on the wireless devices creates the pairing between the devices and stores the 32 bit hash group identification in the device's memory. When two unpaired devices sharing a group identification number are brought within a predetermined proximity to one another, the devices automatically pair.

Abstract: The present disclosure provides for a method of pairing wireless devices as well as wireless devices employing the pairing methodology. The wireless devices each possess individual identifiers. The individual identifiers comprise a 64 bit number. Each device also possesses a number of selection indicator identifiers. The selection indicator identifier is a preferably a color comprising a 24 bit number. The individual identifier and selection indicator identifier are combined using a hash function to create a 32 bit hash group identification. A simultaneous holding of buttons on the wireless devices creates the pairing between the devices and stores the 32 bit hash group identification in the device's memory. When two unpaired devices sharing a group identification number are brought within a predetermined proximity to one another, the devices automatically pair.

Abstract: The present disclosure provides for a method of pairing wireless devices as well as wireless devices employing the pairing methodology. The wireless devices each possess individual identifiers. The individual identifiers comprise a 64 bit number. Each device also possesses a number of selection indicator identifiers. The selection indicator identifier is a preferably a color comprising a 24 bit number. The individual identifier and selection indicator identifier are combined using a hash function to create a 32 bit hash group identification. A simultaneous holding of buttons on the wireless devices creates the pairing between the devices and stores the 32 bit hash group identification in the device's memory. When two unpaired devices sharing a group identification number are brought within a predetermined proximity to one another, the devices automatically pair.

Abstract: Color space conversion from a first image definition scheme to a second image definition scheme is realized by utilizing only one step of matrix multiplication and by determining whether determined RGB values are in a valid RGB region and, if not, generating a first modification factor to bring the RGB vector onto or in close proximity to the boundary of the valid RGB region. Then, the first modification factor is employed to modify in a prescribed manner the converted chroma values. In a specific embodiment of the invention, only a single matrix multiplication is employed and the otherwise additional required multiplication and/or division steps are realized by additions and/or subtractions and by employing a prescribed iterative process to bring the RGB values into or close to the valid RGB color space region. The converted chroma values are also modified by associated second modification factors also generated in the iteration process.

Abstract: In encoding high-definition video signals, the method includes overlapping panels with a single row in the overlap, selecting the better-encoded one of the rows in the overlap, removing the unselected row, and merging bit streams from the panels. In deciding which one of the rows in the overlap is better encoded, a heuristic approach may be used, for example, a panel with the fewer bits, or with fewer errors or the panel as suggested by the motion vectors. Optionally, panels may be synchronized by copying the selected row in the overlap in place of the unselected row in the overlap.

Abstract: Color space conversion from a first image definition scheme to a second image definition scheme is realized by utilizing only one step of matrix multiplication and by determining whether determined RGB values are in a valid RGB region and, if not, generating a first modification factor to bring the RGB vector onto or in close proximity to the boundary of the valid RGB region. Then, the first modification factor is employed to modify in a prescribed manner the converted chroma values. In a specific embodiment of the invention, only a single matrix multiplication is employed and the otherwise additional required multiplication and/or division steps are realized by additions and/or subtractions and by employing a prescribed iterative process to bring the RGB values into or close to the valid RGB color space region. The converted chroma values are also modified by associated second modification factors also generated in the iteration process.

Abstract: A phase tracker receives a signal component xn and forms a phase- and gain-corrected signal zn. In particular, the phase tracker performs a Hilbert transform of xn to produce a quadrature phase component yn to form the constellation defined by (xn, yn). Consequently, phase rotation and gain adjustment are combined into a linear transform of the constellation defined by (xn, yn). The linear transform zn=&agr;xn+&bgr;yn employs two coefficients &agr; and &bgr;. The coefficients &agr; and &bgr; of the linear transform are derived so as to provide an optimal solution according to minimum mean square error. Approximations to the coefficients &agr; and &bgr; of the linear transform may be iteratively determined with a stochastic gradient method. Advantages of employing the phase- and gain-corrected signal zn as an I-phase detection result of a demodulator include 1) the phase rotation and gain adjustment are combined into one operation, and 2) the a sine/cosine lookup table is not employed.

Abstract: De-interlacing is effected by determining the motion at each missing pixel and, then, interpolating the missing lines to convert an interlaced field to a progressive frame. The interpolation employed for luminance is determined through motion detection. If motion is detected in the image field based interpolation is used and if no motion of the image is detected frame interpolation is used. Specifically, the interpolation is determined by employing a motion metric. The motion metric at a missing pixel is defined by using a prescribed combination of pixel luminance value differences. A spatial median filter is then used to remove objectionable noise from the pixel luminance value differences and to fill in so-called “holes” in the image. Indeed, the spatial median filter can be considered as providing a measure of the overall effect of all pixels that make up the object of the image.

Abstract: A digital carrier recovery system includes at least two modes of operation, namely, an acquisition mode and a tracking mode. The bandwidth of the carrier recovery loop filter is different for the acquisition mode and the tracking mode. In the acquisition mode, the digital phase-locked loop seeks and locks to the long term frequency offset of the received carrier signal. In the tracking mode, the digital phase-locked loop tracks the instantaneous variations in the carrier phase. Switching between the acquisition mode and the tracking mode is realized digitally, and includes programmable hysteresis, resulting in optimal performance in the presence of signals having high levels of phase noise (jitter). More specifically, the carrier recovery loop filter “locks” to the pilot signal of an incoming signal, e.g., a vestigial side band (VSB) video signal, by employing a so-called digital vector tracking phase-locked loop that demodulates the VSB signal.

Abstract: A digital timing recovery system advantageously employs both demodulated I-phase and Q-phase components to more accurately locate the synchronization signal of an incoming VSB signal. The Q-phase component is advantageously employed to detect the phase error. The use of the Q-phase component provides a more accurate measure of the phase error and results in a larger (wider) acquisition range for timing frequency offset. More specifically, the timing recovery system of this invention performs symbol clock recovery based on the VSB signal segment synchronization (sync) signal and generates a pulse density modulated (PDM) phase difference signal that controls a voltage controlled crystal oscillator (VCXO) in the phase-locked loop. This is realized, in one embodiment of the invention, by correlating received sync segment data with the known sync signal pattern and searching for "peaks" in the correlation values that are periodic at the known sync segment data rate.

Abstract: The present invention provides a password authentication security system for a telecommunications network having a plurality of user terminals or subscriber stations communicably coupled to the network. The system comprises a network control center coupled to the subscriber stations, to service provider stations and to network databases via the network. Upon establishment of a communication with a subscriber station, a network coupling identifier comprising in one embodiment the telephone number of the line to which the subscriber station is connected is detected at a telephone switching office and transmitted to the control center. If this is the first time communications have been established between the subscriber station and the network, the received telephone number is encrypted to produce a secret password that is then automatically transmitted to the subscriber station for storage in memory.

Abstract: Techniques for employing a television set and a television set controller as the control interface for devices which themselves do not have display capability and for services provided via the telephone network. The techniques involve control apparatus which is connected to the telephone network and a television set and is responsive to inputs from a hand-held controller for the television set. The control apparatus outputs a screen which contains control selections to the television set and the user employs the controller to make a selection. The control apparatus then performs the control function specified by the selection. One application is a telephone messaging system: integral with the control apparatus is a system which can answer calls and store voice messages, fax messages, character-string messages, and script messages. The control apparatus plays the voice messages on the television set and provide screens to the television set which display the fax and character-string messages.