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5729535 |
Method and apparatus for adapting a computer for wireless communications
Disclosed herein is a computer capable of transmitting and receiving video and audio signals over an RF bandwidth. The RF bandwidth is allocated among the audio and video signals to allow the audio...
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5729282 |
Video camera system
A digital video communication system for bidirectional communication between a first station and a second station is disclosed. The first station, which may be a camera head unit, includes a first...
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5726989 |
Method for ensuring synchronization of MPEG-1 data carried in an MPEG-2 transport stream
A method for ensuring synchronization of MPEG-1 data is carried in an MPEG-2 transport stream for decoding by an MPEG-1 decoder. The method includes searching the MPEG-2 transport stream for a...
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5712850 |
System for digital broadcasting by satellite
The invention relates to a system for digital broadcasting by satellite and including a link sending digital information to the satellite, the satellite retransmitting a broadcast multiplex....
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5708664 |
Statistical multiplexing
A transmitter for transmitting a plurality of digital signals through a plurality of channels, the channels having a predetermined total allocated bitrate, includes a plurality of encoders each...
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5706057 |
Phase detector in a carrier recovery network for a vestigial sideband signal
A television signal receiver for processing an HDTV signal transmitted in a vestigial sideband (VSB) format with a one-dimensional data constellation includes a first carrier recovery network (18),...
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5699360 |
Method of and system for distributing digital audio image data
Digitally-compressed audio and image data of a plurality of programs (logical channels) are distributed and superimposed for every horizontal synchronizing signal period together with...
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5691767 |
Video conferencing system with high resolution still image capability
Image data of four frames are stored in four memories and the image data from the four memories are sequentially transmitted, whereby still picture image data having a resolution twice the...
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5691986 |
Methods and apparatus for the editing and insertion of data into an encoded bitstream
Methods and apparatus for inserting data into an encoded data stream are disclosed. In accordance with the disclosed methods data is inserted into an encoded data stream while maintaining MPEG-2...
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5691768 |
Multiple resolution, multi-stream video system using a single standard decoder
A video system is disclosed in which a single generic MPEG standard encoder (107) is used to simultaneously code and compress plural different resolution video signals from a single input video...
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5691774 |
Apparatus for detecting motion vector and encoding picture signals
Apparatus for detecting a motion vector and encoding picture signals. Where a motion vector is obtained by block matching employing a luminance pattern obtained by eliminating dc components from a...
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5689436 |
Apparatus for compressing and decompressing video signal
While a image is displayed on a color monitor 44 based on a first digital video signal DRGB1 output from a first A-D converter 52, a second digital video signal DRGB2 output from a second A-D...
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5686961 |
Automatic video image data reduction and prioritization system and method
A system and method for processing video imagery. The system automatically selects for transmission, or storage, portions of a video image at an automatically selected compression level, and/or in...
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5686956 |
Object-by background information coding apparatus and method
An object based background information coding apparatus and method for an MPEG-4 system codes background images for effectively compressing image data corresponding to an MPEG-4 profile and for...
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5686965 |
Two-part synchronization scheme for digital video decoders
A novel synchronization scheme for use in connection with digital signal video decoder comprises a pre-parser, a channel buffer, and a post-parser. The pre-parser synchronizes to a multiplexed...
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5686964 |
Bit rate control mechanism for digital image and video data compression
A bit rate control mechanism for a digital image or video compression system estimates a complexity parameter for a current picture, or block of samples, of a video signal as a function of...
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5684804 |
Device for transmitting, receiving and decoding compressed audiovisual streams
A device for transmitting and decoding audio-visual streams arranged in accordance with standard ISO/IEC 11172 is provided. The device (DEC) comprises: interfaces (CSC, IA, CIS) for connection to a...
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5677980 |
Decoder for compressed digital signal
A decoder for decoding compressed data obtained through compression of digital data based on a high efficiency coding technique. The compressed data is processed in units of a predetermined amount...
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5677981 |
Video signal recording apparatus which receives a digital progressive scan TV signal and switches the progressive signal frame by frame alternately
A video signal recording apparatus including a switching device for receiving a digital progressive scan TV signal having a frame cycle which is 1/2 of the frame cycle of an interlaced scan TV...
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5666151 |
Multiple audio and video signal providing apparatus
A video signal provider multiplexes digital video signals for four channels and provides a signal the bandwidth of which is limited to 6 MHz by RF-modulation. An analog video signal provider...
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5661728 |
Decoder for audio signals of compressed and coded audiovisual streams
A decoder for audio signals belonging to audio-visual streams coded in accordance with standard ISO/IEC 11172 is provided. The decoder has a presentation unit (UP) which is controlled by a first...
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5659365 |
Video compression
In video motion vector generation and compensation, it is common for the chrominance sampling rate to be half the luminance sampling rate. When only a luminance motion vector is used, there can be...
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5652624 |
Systems for dither-quantizing and reconstruction of digital television signals
Recording of the stream of very coarse samples with which a preferred multiphase dither-quantizer sends compressed television permits multiple playback modes for reconstructing an archival TV...
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5646942 |
Simulcast transmission of digital programs to shared antenna receiving systems
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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5633683 |
Arrangement and method for transmitting and receiving mosaic video signals including sub-pictures for easy selection of a program to be viewed
MPEG2-based transmission systems transmit a large number of digital television programs in a single physical channel. Disclosed herein is a "Channel Navigation System" which allows a user to get an...
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5627581 |
Encoding apparatus and encoding method
The characteristic of a digital video signal is detected by first characteristic detecting circuit, and the characteristic of a digital speech signal is detected by second characteristic circuit....
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5623314 |
MPEG decoder memory data storage and transfer
Data transfer and timing in an external DRAM memory of an MPEG decoder utilizes a repetitive pattern for synchronous writing and reading of data and data refresh including a sequence header at the...
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5621465 |
Color image encoder
A color image encoder comprises a block converter for dividing a digital color video signal, which is composed of a Y signal and R-Y and B-Y signals, into blocks for the respective signals; an...
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5621429 |
Video data display controlling method and video data display processing system
A video data display controlling method and system in which an image in each image area or in each partial image area of each image area to be displayed on a display screen and designated by a user...
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5619265 |
Camera capable of selecting compression ratio efficiency
The still camera includes: an imaging section which forms an image of an object to be photographed and outputs analog image data; an A/D conversion section which performs A/D conversion upon this...
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5619269 |
Frame sync signal for digital transmission system
An ATV signal includes a field sync reference having a relatively long pseudo-random number symbol sequence followed by three relatively short pseudo-random number symbol sequences, with the middle...
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5614955 |
Compressed digital multi-channel video communications system having one or more auxiliary channels to accomodate high bit rates
A compressed digital multi-channel video communications system having at least one auxiliary channel. The other channels are assigned to respective program sources. These channels are prioritized....
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5614952 |
Digital video decoder for decoding digital high definition and/or digital standard definition television signals
Methods and apparatus for reducing the complexity of decoder circuitry and video decoder memory requirements are disclosed. The described video decoders are capable of decoding HDTV pictures at...
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5610659 |
MPEG encoder that concurrently determines video data encoding format and rate control
A coding conditions selection apparatus, adapted for inclusion in an MPEG-II encoder chip, and methods for selecting encoding parameters for a macroblock of video data includes an encoder decision...
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5610944 |
Process and device for segmentation into sub-bands and for reconstruction of a digital signal, and corresponding device
A process and device for segmentation into and reconstruction from sub-bands of a digital signal each sample of which are submitted to a parallel processing on a plurality of paths by prototype...
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5606369 |
Buffering for digital video signal encoders using joint bit-rate control
Video signal encoding apparatus, suitably for multiple video channels (A,B) has respective encoder stages (10,12) which encode a received video signal according to a predetermined coding scheme,...
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5602595 |
ATV/MPEG sync system
An ATV system encodes variable length elementary streams of data into a multilevel symbol signal comprising a plurality of multiplexed fixed length data packets without sync information. The fixed...
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5596369 |
Statistically derived method and system for decoding MPEG motion compensation and transform coded video data
A Motion Picture Experts Group (MPEG) video/audio data bitstream includes macroblocks of video data which can each include input Motion Compensation (M) data and input discrete cosine Transform...
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5596546 |
Spatially distributed signal sampling method
A method of preserving frequency components in digitally sampled signals exceeding a maximum frequency related to a predetermined digital sample interval. The signals correspond to a plurality of...
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5594550 |
Digital signal recording apparatus for recording digital data comprising a plurality of recording blocks
A recording apparatus for recording digital data comprised of a plurality of recording blocks on a recording medium includes a grouping circuit which makes a group of the digital data according to...
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5594730 |
Data distribution system and methods for its use
A subscriber system (10), operating in combination with other similar subscriber systems, for collectively and swiftly distributing multiple copies of digital data to a large number of other...
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5592237 |
High resolution image processor with multiple bus architecture
A multiple video data bus architecture permits high speed data transfer among the various circuit elements of a fluoroscopic imaging processor. This permits simultaneous acquisition, storage,...
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5585850 |
Adaptive distribution system for transmitting wideband video data over narrowband multichannel wireless communication system
A technique for transmitting wideband signals such as video signals over a communication system such as a cellular or Personal Communication System (PCS) which only has narrowband channels. The...
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5585928 |
Video signal recording and reproducing apparatus a frequency down-cinverted luminance signal into the vertical retrace line interval of a recording signal
A video signal recording apparatus includes a high band signal recording process unit wherein a high band signal separated from a video signal is transmitted to a low band to thereby be compressed...
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5583574 |
Video-data transmitter, video-data receiver, and video-data transceiver for connecting parallel video-data into serial video-data and vice versa
A video data transmitter includes: chrominance-data multiplexer which multiplexes parallel data obtained by digitizing a chrominance signal Pb, which is a component signal of an analog HDTV video...
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5577191 |
System and method for digital video editing and publishing, using intraframe-only video data in intermediate steps
A system for digital video editing and publishing is disclosed including a video capture unit, a video compression unit, and video decompression unit coupled to a host computer having video editing...
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5576837 |
Digital modulators for use with sub-nyquist sampling of raster-scanned samples of image intensity
Apparatus useful in electronics for the tape recording of a video signal, which is a baseband signal of a prescribed bandwidth extending up to a prescribed maximum frequency, processes the video...
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5574500 |
Video quality evaluating equipment for reproduced image of video signal subject to digital compression
A sync controller 14 controls an amount of delay of a delay part 15 so that original video data entered from a video source 1 is synchronized with reproduced video data which is compressed and...
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5572654 |
Method and apparatus for graceful degradation of image playback frames rates
In a method and apparatus for decompressing a digital video signal representative of an input sequence of digital video frames, a digital video signal is provided to a video decompressor having a...
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5566174 |
MPEG information signal conversion system
A method of transmitting timing critical data via an asynchronous channel. The timing critical data can be an MPEG transport stream of packets. The asynchronous channel can be a computer or...
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