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WO/1989/006469A1 |
An NTSC compatible widescreen EDTV system comprises three components: (1) a main component containing center panel information and low frequency side panel information; (2) an auxiliary component containing side panel high frequency info...
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WO/1989/006470A1 |
The invention relates to an adaptive method for coding and decoding a series of images by transformation, the coding comprising: dividing each image into image element frames, each frame being represented by a frame of luminance values, ...
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WO/1989/006471A1 |
The invention relates to a synchronization method comprising the transmission of, in addition to data, inter-frame separators, in order to separate the data corresponding to distinct frames, each inter-frame separated comprising a fixed ...
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WO/1989/006082A1 |
At a sending station in a digital television transmission system embodying the invention, time-division multiplexing (60) either of the spatial-frequency analyses of the video signals from a television camera (2) or of their interframe D...
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WO/1989/005555A1 |
A method and apparatus for transmitting extended aspect ratio pictures is described. The transmitted pictures can be viewed on an extended aspect ratio high definition screen but can also be viewed on a reduced number of lines on a conve...
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WO/1989/003157A2 |
A full motion color digital video signal (52) is compressed, formated for transmission, recorded on compact disc media (20) and decoded at conventional video frame rates. During compression, regions of a frame are individually analyzed t...
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WO/1989/003155A1 |
Circuitry for processing video components of an image to be digitally reproduced within an image. The image to be reduced is digitalized and reproduced in reduced form within the original image. A high multiplexing frequency is required ...
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WO/1989/003158A1 |
A full motion color digital video signal (S2) is compressed, formatted for transmission, recorded on compact disc media (20) and decoded at conventional video frame rates. During compression, regions of a frame are individually analyzed ...
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WO/1989/002687A1 |
An NTSC compatible, single broadcast channel, widescreen EDTV system encodes and decodes a television signal comprising four components: (1) a main, standard format NTSC signal (N) with low frequency side panel image information compress...
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WO/1989/002688A1 |
An NTSC compatible, single broadcast channel, widescreen EDTV system encodes and decodes a television signal comprising: (1) a main, standard format NTSC signal (N) with low frequency side panel image information compressed into the over...
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WO/1989/002685A1 |
A system for encoding a progressive scan widescreen EDTV signal so as to be compatible with a standard NTSC receiver develops an auxiliary signal (YT) containing vertical-temporal information derived from image field difference informati...
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WO/1989/002686A1 |
An NTSC compatible, single channel widescreen EDTV system encodes and decodes a television signal comprising (1) a main, standard format NTSC signal (N) with auxiliary low frequency side panel image information compressed into an oversca...
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WO/1989/002691A1 |
A system for encoding a progressive scan widescreen EDTV signal (NTSCF) for use by both a standard interlaced NTSC receiver and a widescreen EDTV receiver develops an auxiliary signal (YTN) containing information to assist in the convers...
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WO/1989/002689A1 |
An NTSC compatible, single channel widescreen EDTV system encodes and decodes a television signal comprising (1) a main, standard format NTSC signal (N) with auxiliary low frequency side panel image information compressed into a overscan...
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WO/1989/002690A1 |
An NTSC compatible widescreen EDTV system encodes and decodes a television signal comprising: (1) a main, standard format NTSC signal (N) component with low frequency side panel image information compressed into the overscan regions ther...
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WO/1989/002204A1 |
A method for enabling an increase in the vertical definition of a transmitted television signal while preserving its bandwidth including the steps of decimating alternate lines of the television signal and reinterpolating untransmitted a...
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WO/1989/001273A1 |
A high definition television signal with a sequential scan with the standard number of lines per frame and double the frame frequency is processed to generate a single MAC line of 128 microsecond duration for each four line group of the ...
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WO/1989/001276A1 |
A widescreen television signal having left side, right side and center panel information is converted into a signal compatible with a standard television system, such as NTSC. In the compatible signal, center panel information is expande...
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WO/1989/001275A1 |
Apparatus for encoding a video signal includes means for generating a video signal containing information to be displayed during periodic horizontal line image intervals. The video signal comprises a luminance component including vertica...
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WO/1989/001274A1 |
A widescreen television signal having left side, right side and center panel information is converted into a signal compatible with a standard television system, such as NTSC. In the compatible signal, center panel information is expande...
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WO/1988/010053A1 |
An improved color subcarrier and amplitude reference signal and means for its utilization are provided for color television systems, particularly high definition, wide aspect ratio television systems wherein the high definition signal is...
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WO/1988/010051A1 |
A still image communication system performs a block cosine transformation on an image of bandwidth compression. A transmitter subsamples a full resolution image, to provide a preview image, and transforms and transmits the preview image ...
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WO/1988/010045A1 |
Improved efficiency of frequency-modulated (FM) transmission of signals through analog channels, i.e., achievement of a higher bandwidth and/or signal-to-noise ratio (SNR) in the received signal for a given channel bandwidth and channel ...
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WO/1988/007800A1 |
The present invention relates to noise reduction in television signals, in particular high definition television signals, such as High Definition Multiplexed Analogue Component (HDMAC) signals, transmitted on F.M. channel. High definitio...
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WO/1988/006778A2 |
The invention is embodied in a system comprising image memory and a display processor that automatically processes video data which alternate between having chrominance pixels of greater area than luminance pixels and having chrominance ...
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WO/1988/002955A1 |
A circuit delays a digital signal by means of shift registers. The digital signal is first stored at a high clock frequency (CK1) in an intermediate memory (21), after which it is alternately stored in intermediate memories (L2, L3) by m...
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WO/1988/001462A1 |
An HDTV video signal with 1249 lines per picture is transmitted over a transmission channel designed for 625 lines per picture by transmitting alternate samples of two lines of the 1249 line signal on a single line of the 625 line signal...
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WO/1988/000783A1 |
A PAL television signal is modified in that the vertical blanking interval includes a plurality of data items each representing picture-dependent, e.g. movement, information from a related area of the picture being transmitted, there bei...
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WO/1988/000422A1 |
Motion detector which operates by employing information contained in the frequency spectrum of a television signal. The motion detector employs a narrow band pass filter (11) at a harmonic of the vertical sweep frequency which filter is ...
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WO/1987/007810A1 |
Multiplexed analog component television signal where the clock recovery signal and the DC restoration signal alternate in different lines during the horizontal blanking interval (21). The clock recovery signal and the DC restoration sign...
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WO/1987/007809A1 |
A method and apparatus for reformatting MAC color television signal to reduce bandwidth. Chrominance and luminance components are serially arranged on a line by line basis with the luminance component not compressed or minimally compress...
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WO/1987/006418A1 |
Video signals from a source (10) are digitised and applied to a source coder (15) which segregates the signals into four channels (CH1 to CH4) of progressively less visual significance. CH1 carries basic picture information at a relative...
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WO/1987/005770A1 |
At the transmitter a coder includes a motion vector generator (10) providing vectors (MV) describing the movement of individual blocks of pixels. The video signal is 4:1 compressed in bandwidth by pre-filters (13) and a sub-sampling unit...
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WO/1987/005769A1 |
A correlation surface is derived by phase correlating two pictures selectively displaced in the X and Y directions. The illustrative surface shows a large peak at zero displacement, corresponding to a stationary background, and a fairly ...
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WO/1987/004034A1 |
A video signal received from a source (10) is bandwidth-compressed by filters (12, 14, 16), filter (14) being a temporal filter and filter (16) being a spatial filter. Selection of the filter to be used is dependent upon picture content....
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WO/1987/002849A1 |
A system for transmitting information along a common channel by means of amplitude division multiplexing. Such a system may be used to transmit RGB video signals to a network of visual display units (VDU). An encoder (1) receives RGB sig...
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WO/1986/005644A1 |
A widescreen television picture is sampled at a higher sampling rate so as to fit all of the information in the current 52.5 us active video line time. A selection signal is also incorporated with the widescreen picture signal, allowing ...
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WO/1986/004761A1 |
A clamping circuit (42, 44) for use in a line sequential video processor (73) sets separate dc voltage levels for a pair of color difference signals (B-Y, R-Y). The respective dc levels serve to identify the sequence of the color differe...
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WO/1986/004759A1 |
A system (FIGS. 1A-1C) for transmitting analog component video signals (Y, (R-Y), (B-Y)) in digital form uses sharp cut-off low-pass filters (104-106) to bandlimit the signals. Chrominance signals are limited to one-half of the 4.2 MHz b...
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WO/1986/003919A1 |
In a FM television signal angle modulated with luminance and chrominance information, there exists a high degree of correlation between picture elements occurring one line period apart. In an effort to steer the pass band of a tunable ba...
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WO/1986/003923A1 |
A television (TV) system having provision for automatically compensating for signal distortion which would cause artifacts at the point where high- and low-resolution portions of an extended aspect ratio, high definition TV display are j...
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WO/1986/001952A1 |
Amplitude limiting of a frequency modulated signal, in particular a sampled signal such as a multiplexed analogue component television signal, in order to reduce the bandwidth taken up by the signal. A number of problems arise when apply...
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WO/1986/001967A1 |
In a Multiplexed Analog Component (MAC) color television transmission system in which the MAC signal is to be converted at the receiver to a composite color television signal having a 227.5 fH color subcarrier, frequency-generation equip...
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WO/1985/005743A1 |
An automatic gain control circuit (e.g. for use in a SECAM television receiver) comprising: an input node (2); an output node (40); controllable gain amplifier means (6) having a signal input (4) connected to the input node, a control in...
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WO/1985/005205A1 |
Transform techniques for transforming numerical signal data into a transform domain and subsequent reconstruction, for purposes such as compression (bandwidth reduction) for communication or storage. The subject transforms involve severa...
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WO/1985/005002A1 |
A technique for generating a Semi-Compatible High Definition Television (SC-HDTV) signal which can be sent over two present-day Cable Television (CATV) channels. In accordance with the present invention, a HDTV signal is formed comprisin...
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WO/1985/002731A1 |
The regulation circuit comprises a digitally controlled oscillator (9) which oscillates with two frequencies which are slightly above and under a rated frequency. The digitally controlled oscillator is controlled by a phase comparator (1...
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WO/1985/002312A1 |
A television receiver in which the frequency of a read clock supplied to field memories (16a), (16b) in combination constituting a converter circuit (16) to convert the field frequency of a picture signal is varied in units of the vertic...
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WO/1985/000493A1 |
Chrominance component signals of two different types are produced such that the chrominance signals alternate within a field and between adjacent fields in order to provide an improved amount of information from which to enhance the vert...
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WO/1985/000492A1 |
An enhanced MAC signal for satellite broadcasting purposes is provided by adding additional chrominance and luminance component information to the existing signal without altering the timing relationship of the existing component informa...
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