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7602443 |
Methods for improved modulation of video signals
A method for modulating a video signal. Frames are selected from a plurality of frames for modulation. Intensity of a plurality of pixels of a plurality of scan lines of a field of the selected...
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7586542 |
Methods for improved modulation of video signals
A method for modulating a video signal. Frames of a plurality of frames are selected for modulation. A first magnitude alternation pattern is designated for each of a first area of a field of the...
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RE40107 |
Video/audio transmission system and method
The invention is a data pipeline system which synchronizes the display of digitized audio and video data regardless of the speed at which the data was recorded on its linear medium. To do this, the...
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7006568 |
3D wavelet based video codec with human perceptual model
A video encoding/decoding system based on 3D wavelet decomposition and the human perceptual model is implemented. JND is applied in quantizer design to improve the subjective quality of compressed...
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6954234 |
Digital video data signal processing system and method of processing digital video data signals for display by a DVI-compliant digital video display
A system and method allows a high-bandwidth serial or parallel digital video broadcast data signal to be monitored on a low-cost digital display device such as a computer monitor. The system...
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6847659 |
Methods and apparatus for reconfiguring protocol data when reducing multiplexed data streams
The present invention provides methods and apparatus for reconfiguring protocol data for a multiplexed data stream which is reduced to carry fewer services for cable-side transmission in a cable...
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6757434 |
Region-of-interest tracking method and device for wavelet-based video coding
A method and device for tracking a region-of-interest in a sequence of image frames, wherein the boundary of the target region of a previous frame is projected onto the current frame so that a...
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6477185 |
Demultiplexing and decoding apparatus for coded audio and video data
A demultiplexing and decoding apparatus for coded audio and video data realized with a simple circuit construction and reduced processing load, which processes a packet with higher priority over...
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6072837 |
Quantizing apparatus and quantizing method
A subtraction device subtracts a predicted value generated by a predicting portion from a digital picture signal supplied through an input terminal. The subtraction device generates a difference...
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6005605 |
Television distribution system and method
Within a desired service area, multiple transmitters at separately located sites simultaneously broadcast the same multi-channel, multi-program signal. Broadcast waves from the transmitters...
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5870434 |
Apparatus and method for quantizing a digital signal based on quantizing steps including odd-numbered steps
A subtraction device subtracts a predicted value generated by a predicting portion from a digital picture signal supplied through an input terminal. The subtraction device generates a difference...
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5859876 |
Method and apparatus for improving AM compatible digital broadcast analog fidelity
A digital signal transmission system is provided which minimizes the AM signal envelope distortion caused by multiple digitally modulated carriers in the same band as the AM signal. The system...
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5727090 |
Method of storing raster image in run lengths havng variable numbers of bytes and medium with raster image thus stored
The invention implements a run-length file format with improved space-sav qualities. The file starts with a header in ASCII format and includes information such as the file format, maximum X and Y...
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5583569 |
Video camera having asynchronous digital output including header data
A video camera is adapted to provide an asynchronous computer-friendly output signal instead of a standard analog video format. The output signal becomes a digitally-encoded message wherein each...
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5524025 |
Coding for digital transmission
Digital signals, such as digitized television signals, are subjected to a source coding step followed by a channel mapping step. The source coding step causes the television signal to be...
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5523795 |
Method and apparatus for serial transmission and/or reception of nonsynchronous, multiplexed signals
A method and an apparatus capable of transmitting and receiving multiplexed signals as serial data in such a manner that, even in a state where a continuous signal such as an audio digital signal...
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5495298 |
Apparatus for concealing detected erroneous data in a digital image signal
An apparatus for concealing error data of pixel data in a digital image signal. The apparatus includes a deframing circuit for detecting errors every predetermined unit to generate a first error...
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5475439 |
Image processing apparatus with chrominance processing and luminance delay
An image processing apparatus for performing digital signal processing on an input color video signal is provided with a delay circuit for cancelling a time difference which occurs between a...
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5416525 |
Method and apparatus for digitally coding and decoding a composite signal, containing baseband and out-of-band signals using relatively few bits and yielding a decoded out-of-band signal having increased quality
A composite signal which comprises a video signal situated in the base band and a frequency-modulated audio signal situated outside the base band is coded by an N-bit pulse code modulator or an...
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5386239 |
Multiple QAM digital television signal decoder
In a video signal processing system, a single adaptive passband equalizer is used to process a composite Quadrature Amplitude Modulated (QAM) signal encoded with high priority (HP) and standard...
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RE34810 |
Fast acting phase shifting apparatus for use in digital sampling systems
A method and apparatus is disclosed for controlling the sampling of a composite analog color video signal so that the analog signal is sampled at precise locations relative to the phase of the...
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5329375 |
Information recording/reproducing apparatus
In the recording apparatus and reproducing apparatus employing variable length coding, a formatting which prevents propagation of error due to transmission route error is realized. The input...
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5329360 |
Multiplexing and demultiplexing image data
Image data multiplexing apparatus for multiplexing digital luminance and chrominance data of a representation of an image into multiplexed data blocks of a predetermined length, along with a...
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5323232 |
Filter device for decimation and interpolation of chrominance components of a video signal
A decimation or interpolation filter is selectively used for decimation or interpolation of pixel data of a chrominance component of a video signal, In general, the chrominance signal and the...
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5313274 |
Color signal matrix circuit
In a matrix operation apparatus for calculating output signals by multiplying input signals with coefficients, a plurality of matrix element calculating circuits multiply the input signals with...
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5311547 |
Partial-response-channel precoding
Digital data is transmitted over partial-response channels using a precoding technique which allows for the use of a wide variety of transmit constellations. A sequence of signal points is selected...
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5301018 |
Method and apparatus for shuffling image data into statistically averaged data groups and for deshuffling the data
In a data compression process such as employed to compress video or other data, it is preferable not to compress the image data representative of the video image in a sequential format, or to take...
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5298992 |
System and method for frame-differencing based video compression/decompression with forward and reverse playback capability
A process for coding a plurality of compressed video data streams in a time ordered sequence. Each compressed data stream includes coding of frame to frame differences of a video segment, which are...
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5293228 |
Method for the coding of color images at high compression rate without filtering, corresponding decoding method, coder, decoder and applications
A method for the coding of images represented by source signals by means of which a luminance signal is formed by linear combination, using positive coefficients of the source signals, and at least...
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5289508 |
Clock information transmitting device and clock information receiving device
A clock information transmitting device coupled to a digital processing circuit which receives a transmission signal and generates a coded transmission signal includes a PLL circuit for generating...
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5285275 |
Decoding method of picture image data and decoding circuit therefore
A method of and a circuit for decoding compressed picture image data wherein compressed picture image data of a variable length can be decoded at a fixed high rate. A buffer memory into which...
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5272529 |
Adaptive hierarchical subband vector quantization encoder
A method system for data reduction of digital video signals based on vector quantization of vectors formed from coefficients of a discrete cosine transform of pixel blocks. The coefficients are...
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5260781 |
Data compression apparatus and method
A data compression system in which decorrelated data is fed to an entropy encoder (20) in batches having an internal monotonic decrease in average information content from start to end. This...
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5241382 |
Digital HDTV data packet format and receiver therefor
A macroblock packet format is provided for use in a digital HDTV system wherein successive video frames are divided into a plurality of macroblocks. The macroblocks comprise a plurality of...
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5237397 |
Color video data processing
A method for determining if uncompressed color video data was previously compressed and decompressed. Each block of color video data is examined to determine if the block was previously compressed...
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5235410 |
Apparatus and methods for non-linear processing of digital signals
A digital signal is non-linearly processed without generation of alias components by modelling the required non-linear operation by the best available quadratic function. A transformation circuit...
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5233433 |
Recording digital VCR and a reproducing digital VCR for recording and reproducing a digital PAL signal
A recording digital VCR for recording digital PAL signals sampled at four times the chrominance subcarrier frequency, includes: a selection range shifter for shifting a sample in the horizontal...
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5231487 |
Storage of video signals
Apparatus for storing a video signal includes a signal compression arrangement constituted by a spatial two-dimensional sub-band filtering arrangement that filters a digital video signal to form...
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5225904 |
Adaptive digital video compression system
A full motion color digital video signal is compressed, formatted for transmission, recorded on compact disc media and decoded at conventional video frame rates. During compression, regions of a...
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5220410 |
Method and apparaus for decoding encoded video data
Method and apparatus within a multimedia system for digitally decoding video pixel data. The pixel data is decoded to 24 bits per pixel from a compressed 8 bits per pixel format. The compressed...
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5218647 |
Method to convert between 2 color space on a 32 bit μ-processor
An improved method for converting between two color spaces such as the RGB and YIQ color on a 32 bit microprocessor. The present invention only requires in total number of operations three table...
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5218431 |
Raster image lossless compression and decompression with dynamic color lookup and two dimensional area encoding
A computer program is used to compress color graphics animation sequences for local storage and transmission to remotely networked sites in a significantly reduced size It allows playback of these...
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5166779 |
Subcarrier to horizontal phase measurement and display for multiple video signals
A subcarrier to horizontal sync (SC/H) phase difference measurement and display device for multiple sources of composite video signals includes a sample clock generator providing a sampling clock...
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5159612 |
Pulse code modulation system
A pulse code modulation process converts an analog video signal into a digital signal to be passed through a recording or transmission channel. The digital signal includes a digital words of a...
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5159327 |
Synchronous signal polarity converter of video card
A synchronous signal polarity converter of a video card comprises a data output circuit including a graphic processor and a buffer, a driving control circuit, and a synchronous signal output...
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5138440 |
Method and apparatus for communicating a plurality of asynchronous signals over a digital communication path
Multiple asynchronous signals are transmitted and received through a digital link. Each of a plurality of information signals is digitized at a digitizing rate derived from a component of the...
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5134475 |
Adaptive leak HDTV encoder
In a differential PCM encoder, the problem of error perpetuation is solved by leaking a changing, rather than a fixed, fraction of the input signal to the differential PCM. The fraction leaked is...
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5105442 |
Coded modulation with unequal error protection
Digital signals, such as digitized television signals, are subjected to a source coding step in which a class of "most important" data elements represents a proportionately greater amount of the...
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5053859 |
High definition B-MAC television signal transmission system
A method for encoding a high definition television signal comprising a first frequency spectrum portion for standard resolution and a second high frequency spectrum portion for high resolution...
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5045940 |
Video/audio transmission systsem and method
The invention is a data pipeline system which synchronizes the display of digitzed audio and video data regardless of the speed at which the data was recorded on its linear medium. To do this, the...
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